blob: 7912629f35d284288b5cea2beb7217c1585af54a [file] [log] [blame]
Elliott Hughes2faa5f12012-01-30 14:42:07 -08001/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070016
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070017#include "class_linker.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070018
Brian Carlstromdbc05252011-09-09 01:59:59 -070019#include <deque>
Ian Rogerscf7f1912014-10-22 22:06:39 -070020#include <iostream>
Ian Rogers700a4022014-05-19 16:49:03 -070021#include <memory>
Fred Shih381e4ca2014-08-25 17:24:27 -070022#include <queue>
Ian Rogers0cfe1fb2011-08-26 03:29:44 -070023#include <string>
Andreas Gampea696c0a2014-12-10 20:51:45 -080024#include <unistd.h>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070025#include <utility>
Elliott Hughes90a33692011-08-30 13:27:07 -070026#include <vector>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070027
Mathieu Chartierc7853442015-03-27 14:35:38 -070028#include "art_field-inl.h"
Elliott Hughes1aa246d2012-12-13 09:29:36 -080029#include "base/casts.h"
Elliott Hughes07ed66b2012-12-12 18:34:25 -080030#include "base/logging.h"
Narayan Kamathd1c606f2014-06-09 16:50:19 +010031#include "base/scoped_flock.h"
Elliott Hughes1aa246d2012-12-13 09:29:36 -080032#include "base/stl_util.h"
Elliott Hughes76160052012-12-12 16:31:20 -080033#include "base/unix_file/fd_file.h"
Andreas Gampeb9aec2c2015-04-23 22:23:47 -070034#include "base/value_object.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080035#include "class_linker-inl.h"
Vladimir Marko2b5eaa22013-12-13 13:59:30 +000036#include "compiler_callbacks.h"
Elliott Hughes4740cdf2011-12-07 14:07:12 -080037#include "debugger.h"
Ian Rogers4f6ad8a2013-03-18 15:27:28 -070038#include "dex_file-inl.h"
Ian Rogers6f3dbba2014-10-14 17:41:57 -070039#include "entrypoints/runtime_asm_entrypoints.h"
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -070040#include "gc_root-inl.h"
Ian Rogers1d54e732013-05-02 21:10:01 -070041#include "gc/accounting/card_table-inl.h"
42#include "gc/accounting/heap_bitmap.h"
43#include "gc/heap.h"
44#include "gc/space/image_space.h"
Mathieu Chartiereb8167a2014-05-07 15:43:14 -070045#include "handle_scope.h"
Elliott Hughescf4c6c42011-09-01 15:16:42 -070046#include "intern_table.h"
Ian Rogers64b6d142012-10-29 16:34:15 -070047#include "interpreter/interpreter.h"
Mathieu Chartiere5f13e52015-02-24 09:37:21 -080048#include "jit/jit.h"
49#include "jit/jit_code_cache.h"
Ian Rogers0571d352011-11-03 19:51:38 -070050#include "leb128.h"
Mathieu Chartierc7853442015-03-27 14:35:38 -070051#include "linear_alloc.h"
Brian Carlstrom700c8d32012-11-05 10:42:02 -080052#include "oat.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070053#include "oat_file.h"
Richard Uhler66d874d2015-01-15 09:37:19 -080054#include "oat_file_assistant.h"
Ian Rogers22d5e732014-07-15 22:23:51 -070055#include "object_lock.h"
Brian Carlstromea46f952013-07-30 01:26:50 -070056#include "mirror/art_method-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080057#include "mirror/class.h"
58#include "mirror/class-inl.h"
59#include "mirror/class_loader.h"
Ian Rogers39ebcb82013-05-30 16:57:23 -070060#include "mirror/dex_cache-inl.h"
Mathieu Chartierdaaf3262015-03-24 13:30:28 -070061#include "mirror/field.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080062#include "mirror/iftable-inl.h"
Mathieu Chartierfc58af42015-04-16 18:00:39 -070063#include "mirror/method.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080064#include "mirror/object-inl.h"
65#include "mirror/object_array-inl.h"
66#include "mirror/proxy.h"
Fred Shih4ee7a662014-07-11 09:59:27 -070067#include "mirror/reference-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080068#include "mirror/stack_trace_element.h"
Mingyao Yang98d1cc82014-05-15 17:02:16 -070069#include "mirror/string-inl.h"
Brian Carlstrom5b332c82012-02-01 15:02:31 -080070#include "os.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070071#include "runtime.h"
Ian Rogers7655f292013-07-29 11:07:13 -070072#include "entrypoints/entrypoint_utils.h"
Elliott Hughes4d0207c2011-10-03 19:14:34 -070073#include "ScopedLocalRef.h"
Ian Rogers00f7d0e2012-07-19 15:28:27 -070074#include "scoped_thread_state_change.h"
Mathieu Chartiereb8167a2014-05-07 15:43:14 -070075#include "handle_scope-inl.h"
Ian Rogers7b078e82014-09-10 14:44:24 -070076#include "thread-inl.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070077#include "utils.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080078#include "verifier/method_verifier.h"
Elliott Hugheseac76672012-05-24 21:56:51 -070079#include "well_known_classes.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070080
81namespace art {
82
Mathieu Chartierc7853442015-03-27 14:35:38 -070083static constexpr bool kSanityCheckObjects = kIsDebugBuild;
84
Ian Rogers00f7d0e2012-07-19 15:28:27 -070085static void ThrowNoClassDefFoundError(const char* fmt, ...)
86 __attribute__((__format__(__printf__, 1, 2)))
Ian Rogersb726dcb2012-09-05 08:57:23 -070087 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
Elliott Hughes0512f022012-03-15 22:10:52 -070088static void ThrowNoClassDefFoundError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070089 va_list args;
90 va_start(args, fmt);
Ian Rogers62d6c772013-02-27 08:32:07 -080091 Thread* self = Thread::Current();
Nicolas Geoffray0aa50ce2015-03-10 11:03:29 +000092 self->ThrowNewExceptionV("Ljava/lang/NoClassDefFoundError;", fmt, args);
Ian Rogerscab01012012-01-10 17:35:46 -080093 va_end(args);
94}
95
Andreas Gampebfdcdc12015-04-22 18:10:36 -070096static bool HasInitWithString(Thread* self, ClassLinker* class_linker, const char* descriptor)
Ian Rogersb726dcb2012-09-05 08:57:23 -070097 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Andreas Gampebfdcdc12015-04-22 18:10:36 -070098 mirror::ArtMethod* method = self->GetCurrentMethod(nullptr);
99 StackHandleScope<1> hs(self);
100 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(method != nullptr ?
101 method->GetDeclaringClass()->GetClassLoader()
102 : nullptr));
103 mirror::Class* exception_class = class_linker->FindClass(self, descriptor, class_loader);
104
105 if (exception_class == nullptr) {
106 // No exc class ~ no <init>-with-string.
107 CHECK(self->IsExceptionPending());
108 self->ClearException();
109 return false;
110 }
111
112 mirror::ArtMethod* exception_init_method =
113 exception_class->FindDeclaredDirectMethod("<init>", "(Ljava/lang/String;)V");
114 return exception_init_method != nullptr;
115}
116
117void ClassLinker::ThrowEarlierClassFailure(mirror::Class* c) {
Elliott Hughes5c599942012-06-13 16:45:05 -0700118 // The class failed to initialize on a previous attempt, so we want to throw
119 // a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we
120 // failed in verification, in which case v2 5.4.1 says we need to re-throw
121 // the previous error.
Mathieu Chartiere5f13e52015-02-24 09:37:21 -0800122 Runtime* const runtime = Runtime::Current();
123 if (!runtime->IsAotCompiler()) { // Give info if this occurs at runtime.
Ian Rogers87e552d2012-08-31 15:54:48 -0700124 LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c);
125 }
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700126
Elliott Hughes5c599942012-06-13 16:45:05 -0700127 CHECK(c->IsErroneous()) << PrettyClass(c) << " " << c->GetStatus();
Ian Rogers62d6c772013-02-27 08:32:07 -0800128 Thread* self = Thread::Current();
Mathieu Chartiere5f13e52015-02-24 09:37:21 -0800129 if (runtime->IsAotCompiler()) {
Ian Rogers7b078e82014-09-10 14:44:24 -0700130 // At compile time, accurate errors and NCDFE are disabled to speed compilation.
131 mirror::Throwable* pre_allocated = runtime->GetPreAllocatedNoClassDefFoundError();
Nicolas Geoffray14691c52015-03-05 10:40:17 +0000132 self->SetException(pre_allocated);
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700133 } else {
Mathieu Chartier2cebb242015-04-21 16:50:40 -0700134 if (c->GetVerifyErrorClass() != nullptr) {
Ian Rogers7b078e82014-09-10 14:44:24 -0700135 // TODO: change the verifier to store an _instance_, with a useful detail message?
Andreas Gampebfdcdc12015-04-22 18:10:36 -0700136 // It's possible the exception doesn't have a <init>(String).
Ian Rogers7b078e82014-09-10 14:44:24 -0700137 std::string temp;
Andreas Gampebfdcdc12015-04-22 18:10:36 -0700138 const char* descriptor = c->GetVerifyErrorClass()->GetDescriptor(&temp);
139
140 if (HasInitWithString(self, this, descriptor)) {
141 self->ThrowNewException(descriptor, PrettyDescriptor(c).c_str());
142 } else {
143 self->ThrowNewException(descriptor, nullptr);
144 }
Ian Rogers7b078e82014-09-10 14:44:24 -0700145 } else {
Nicolas Geoffray0aa50ce2015-03-10 11:03:29 +0000146 self->ThrowNewException("Ljava/lang/NoClassDefFoundError;",
Ian Rogers7b078e82014-09-10 14:44:24 -0700147 PrettyDescriptor(c).c_str());
148 }
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700149 }
150}
151
Brian Carlstromb23eab12014-10-08 17:55:21 -0700152static void VlogClassInitializationFailure(Handle<mirror::Class> klass)
153 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
154 if (VLOG_IS_ON(class_linker)) {
155 std::string temp;
156 LOG(INFO) << "Failed to initialize class " << klass->GetDescriptor(&temp) << " from "
Nicolas Geoffray14691c52015-03-05 10:40:17 +0000157 << klass->GetLocation() << "\n" << Thread::Current()->GetException()->Dump();
Brian Carlstromb23eab12014-10-08 17:55:21 -0700158 }
159}
160
161static void WrapExceptionInInitializer(Handle<mirror::Class> klass)
162 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Elliott Hughesa4f94742012-05-29 16:28:38 -0700163 Thread* self = Thread::Current();
164 JNIEnv* env = self->GetJniEnv();
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700165
166 ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred());
Andreas Gampe2ed8def2014-08-28 14:41:02 -0700167 CHECK(cause.get() != nullptr);
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700168
169 env->ExceptionClear();
Elliott Hughesa4f94742012-05-29 16:28:38 -0700170 bool is_error = env->IsInstanceOf(cause.get(), WellKnownClasses::java_lang_Error);
171 env->Throw(cause.get());
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700172
Elliott Hughesa4f94742012-05-29 16:28:38 -0700173 // We only wrap non-Error exceptions; an Error can just be used as-is.
174 if (!is_error) {
Nicolas Geoffray0aa50ce2015-03-10 11:03:29 +0000175 self->ThrowNewWrappedException("Ljava/lang/ExceptionInInitializerError;", nullptr);
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700176 }
Brian Carlstromb23eab12014-10-08 17:55:21 -0700177 VlogClassInitializationFailure(klass);
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700178}
179
Fred Shih381e4ca2014-08-25 17:24:27 -0700180// Gap between two fields in object layout.
181struct FieldGap {
182 uint32_t start_offset; // The offset from the start of the object.
183 uint32_t size; // The gap size of 1, 2, or 4 bytes.
184};
185struct FieldGapsComparator {
186 explicit FieldGapsComparator() {
187 }
188 bool operator() (const FieldGap& lhs, const FieldGap& rhs)
189 NO_THREAD_SAFETY_ANALYSIS {
Andreas Gampef52857f2015-02-18 15:38:57 -0800190 // Sort by gap size, largest first. Secondary sort by starting offset.
191 return lhs.size > rhs.size || (lhs.size == rhs.size && lhs.start_offset < rhs.start_offset);
Fred Shih381e4ca2014-08-25 17:24:27 -0700192 }
193};
194typedef std::priority_queue<FieldGap, std::vector<FieldGap>, FieldGapsComparator> FieldGaps;
195
196// Adds largest aligned gaps to queue of gaps.
Andreas Gampe277ccbd2014-11-03 21:36:10 -0800197static void AddFieldGap(uint32_t gap_start, uint32_t gap_end, FieldGaps* gaps) {
Fred Shih381e4ca2014-08-25 17:24:27 -0700198 DCHECK(gaps != nullptr);
199
200 uint32_t current_offset = gap_start;
201 while (current_offset != gap_end) {
202 size_t remaining = gap_end - current_offset;
203 if (remaining >= sizeof(uint32_t) && IsAligned<4>(current_offset)) {
204 gaps->push(FieldGap {current_offset, sizeof(uint32_t)});
205 current_offset += sizeof(uint32_t);
206 } else if (remaining >= sizeof(uint16_t) && IsAligned<2>(current_offset)) {
207 gaps->push(FieldGap {current_offset, sizeof(uint16_t)});
208 current_offset += sizeof(uint16_t);
209 } else {
210 gaps->push(FieldGap {current_offset, sizeof(uint8_t)});
211 current_offset += sizeof(uint8_t);
212 }
213 DCHECK_LE(current_offset, gap_end) << "Overran gap";
214 }
215}
216// Shuffle fields forward, making use of gaps whenever possible.
217template<int n>
Vladimir Marko76649e82014-11-10 18:32:59 +0000218static void ShuffleForward(size_t* current_field_idx,
Fred Shih381e4ca2014-08-25 17:24:27 -0700219 MemberOffset* field_offset,
Mathieu Chartierc7853442015-03-27 14:35:38 -0700220 std::deque<ArtField*>* grouped_and_sorted_fields,
Fred Shih381e4ca2014-08-25 17:24:27 -0700221 FieldGaps* gaps)
222 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
223 DCHECK(current_field_idx != nullptr);
224 DCHECK(grouped_and_sorted_fields != nullptr);
Fred Shih381e4ca2014-08-25 17:24:27 -0700225 DCHECK(gaps != nullptr);
226 DCHECK(field_offset != nullptr);
227
228 DCHECK(IsPowerOfTwo(n));
229 while (!grouped_and_sorted_fields->empty()) {
Mathieu Chartierc7853442015-03-27 14:35:38 -0700230 ArtField* field = grouped_and_sorted_fields->front();
Fred Shih381e4ca2014-08-25 17:24:27 -0700231 Primitive::Type type = field->GetTypeAsPrimitiveType();
232 if (Primitive::ComponentSize(type) < n) {
233 break;
234 }
235 if (!IsAligned<n>(field_offset->Uint32Value())) {
236 MemberOffset old_offset = *field_offset;
237 *field_offset = MemberOffset(RoundUp(field_offset->Uint32Value(), n));
238 AddFieldGap(old_offset.Uint32Value(), field_offset->Uint32Value(), gaps);
239 }
240 CHECK(type != Primitive::kPrimNot) << PrettyField(field); // should be primitive types
241 grouped_and_sorted_fields->pop_front();
Fred Shih381e4ca2014-08-25 17:24:27 -0700242 if (!gaps->empty() && gaps->top().size >= n) {
243 FieldGap gap = gaps->top();
244 gaps->pop();
245 DCHECK(IsAligned<n>(gap.start_offset));
246 field->SetOffset(MemberOffset(gap.start_offset));
247 if (gap.size > n) {
248 AddFieldGap(gap.start_offset + n, gap.start_offset + gap.size, gaps);
249 }
250 } else {
251 DCHECK(IsAligned<n>(field_offset->Uint32Value()));
252 field->SetOffset(*field_offset);
253 *field_offset = MemberOffset(field_offset->Uint32Value() + n);
254 }
255 ++(*current_field_idx);
256 }
257}
258
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800259ClassLinker::ClassLinker(InternTable* intern_table)
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700260 // dex_lock_ is recursive as it may be used in stack dumping.
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700261 : dex_lock_("ClassLinker dex lock", kDefaultMutexLevel),
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700262 dex_cache_image_class_lookup_required_(false),
263 failed_dex_cache_class_lookups_(0),
Ian Rogers98379392014-02-24 16:53:16 -0800264 class_roots_(nullptr),
265 array_iftable_(nullptr),
266 find_array_class_cache_next_victim_(0),
Elliott Hughescf4c6c42011-09-01 15:16:42 -0700267 init_done_(false),
Mathieu Chartier893263b2014-03-04 11:07:42 -0800268 log_new_dex_caches_roots_(false),
269 log_new_class_table_roots_(false),
Jeff Hao0aba0ba2013-06-03 14:49:28 -0700270 intern_table_(intern_table),
Ian Rogers98379392014-02-24 16:53:16 -0800271 quick_resolution_trampoline_(nullptr),
Andreas Gampe2da88232014-02-27 12:26:20 -0800272 quick_imt_conflict_trampoline_(nullptr),
Vladimir Marko8a630572014-04-09 18:45:35 +0100273 quick_generic_jni_trampoline_(nullptr),
Mathieu Chartier2d721012014-11-10 11:08:06 -0800274 quick_to_interpreter_bridge_trampoline_(nullptr),
275 image_pointer_size_(sizeof(void*)) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -0700276 CHECK(intern_table_ != nullptr);
277 for (size_t i = 0; i < kFindArrayCacheSize; ++i) {
278 find_array_class_cache_[i] = GcRoot<mirror::Class>(nullptr);
279 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700280}
Brian Carlstroma663ea52011-08-19 23:33:41 -0700281
Richard Uhlerfbef44d2014-12-23 09:48:51 -0800282void ClassLinker::InitWithoutImage(std::vector<std::unique_ptr<const DexFile>> boot_class_path) {
Brian Carlstroma004aa92012-02-08 18:05:09 -0800283 VLOG(startup) << "ClassLinker::Init";
Alex Light64ad14d2014-08-19 14:23:13 -0700284 CHECK(!Runtime::Current()->GetHeap()->HasImageSpace()) << "Runtime has image. We should use it.";
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700285
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700286 CHECK(!init_done_);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -0700287
Elliott Hughes30646832011-10-13 16:59:46 -0700288 // java_lang_Class comes first, it's needed for AllocClass
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700289 Thread* const self = Thread::Current();
290 gc::Heap* const heap = Runtime::Current()->GetHeap();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700291 // The GC can't handle an object with a null class since we can't get the size of this object.
Mathieu Chartier1d27b342014-01-28 12:51:09 -0800292 heap->IncrementDisableMovingGC(self);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700293 StackHandleScope<64> hs(self); // 64 is picked arbitrarily.
294 Handle<mirror::Class> java_lang_Class(hs.NewHandle(down_cast<mirror::Class*>(
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700295 heap->AllocNonMovableObject<true>(self, nullptr,
296 mirror::Class::ClassClassSize(),
Brian Carlstromf3632832014-05-20 15:36:53 -0700297 VoidFunctor()))));
Andreas Gampe2ed8def2014-08-28 14:41:02 -0700298 CHECK(java_lang_Class.Get() != nullptr);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700299 mirror::Class::SetClassClass(java_lang_Class.Get());
300 java_lang_Class->SetClass(java_lang_Class.Get());
Hiroshi Yamauchi624468c2014-03-31 15:14:47 -0700301 if (kUseBakerOrBrooksReadBarrier) {
302 java_lang_Class->AssertReadBarrierPointer();
Hiroshi Yamauchi9d04a202014-01-31 13:35:49 -0800303 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700304 java_lang_Class->SetClassSize(mirror::Class::ClassClassSize());
Hiroshi Yamauchif0edfc32014-09-25 11:46:46 -0700305 java_lang_Class->SetPrimitiveType(Primitive::kPrimNot);
Mathieu Chartier1d27b342014-01-28 12:51:09 -0800306 heap->DecrementDisableMovingGC(self);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800307 // AllocClass(mirror::Class*) can now be used
Brian Carlstroma0808032011-07-18 00:39:23 -0700308
Elliott Hughes418d20f2011-09-22 14:00:39 -0700309 // Class[] is used for reflection support.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700310 Handle<mirror::Class> class_array_class(hs.NewHandle(
311 AllocClass(self, java_lang_Class.Get(), mirror::ObjectArray<mirror::Class>::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700312 class_array_class->SetComponentType(java_lang_Class.Get());
Elliott Hughes418d20f2011-09-22 14:00:39 -0700313
Ian Rogers23435d02012-09-24 11:23:12 -0700314 // java_lang_Object comes next so that object_array_class can be created.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700315 Handle<mirror::Class> java_lang_Object(hs.NewHandle(
316 AllocClass(self, java_lang_Class.Get(), mirror::Object::ClassSize())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -0700317 CHECK(java_lang_Object.Get() != nullptr);
Ian Rogers23435d02012-09-24 11:23:12 -0700318 // backfill Object as the super class of Class.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700319 java_lang_Class->SetSuperClass(java_lang_Object.Get());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700320 mirror::Class::SetStatus(java_lang_Object, mirror::Class::kStatusLoaded, self);
Brian Carlstroma0808032011-07-18 00:39:23 -0700321
Ian Rogers23435d02012-09-24 11:23:12 -0700322 // Object[] next to hold class roots.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700323 Handle<mirror::Class> object_array_class(hs.NewHandle(
324 AllocClass(self, java_lang_Class.Get(), mirror::ObjectArray<mirror::Object>::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700325 object_array_class->SetComponentType(java_lang_Object.Get());
Brian Carlstroma0808032011-07-18 00:39:23 -0700326
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700327 // Setup the char (primitive) class to be used for char[].
328 Handle<mirror::Class> char_class(hs.NewHandle(
329 AllocClass(self, java_lang_Class.Get(), mirror::Class::PrimitiveClassSize())));
Hiroshi Yamauchif0edfc32014-09-25 11:46:46 -0700330 // The primitive char class won't be initialized by
331 // InitializePrimitiveClass until line 459, but strings (and
332 // internal char arrays) will be allocated before that and the
333 // component size, which is computed from the primitive type, needs
334 // to be set here.
335 char_class->SetPrimitiveType(Primitive::kPrimChar);
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700336
Ian Rogers23435d02012-09-24 11:23:12 -0700337 // Setup the char[] class to be used for String.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700338 Handle<mirror::Class> char_array_class(hs.NewHandle(
339 AllocClass(self, java_lang_Class.Get(),
340 mirror::Array::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700341 char_array_class->SetComponentType(char_class.Get());
342 mirror::CharArray::SetArrayClass(char_array_class.Get());
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700343
Ian Rogers23435d02012-09-24 11:23:12 -0700344 // Setup String.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700345 Handle<mirror::Class> java_lang_String(hs.NewHandle(
346 AllocClass(self, java_lang_Class.Get(), mirror::String::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700347 mirror::String::SetClass(java_lang_String.Get());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700348 mirror::Class::SetStatus(java_lang_String, mirror::Class::kStatusResolved, self);
Jeff Hao848f70a2014-01-15 13:49:50 -0800349 java_lang_String->SetStringClass();
Jesse Wilson14150742011-07-29 19:04:44 -0400350
Mathieu Chartierdaaf3262015-03-24 13:30:28 -0700351 // Setup java.lang.ref.Reference.
Fred Shih4ee7a662014-07-11 09:59:27 -0700352 Handle<mirror::Class> java_lang_ref_Reference(hs.NewHandle(
353 AllocClass(self, java_lang_Class.Get(), mirror::Reference::ClassSize())));
354 mirror::Reference::SetClass(java_lang_ref_Reference.Get());
355 java_lang_ref_Reference->SetObjectSize(mirror::Reference::InstanceSize());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700356 mirror::Class::SetStatus(java_lang_ref_Reference, mirror::Class::kStatusResolved, self);
Fred Shih4ee7a662014-07-11 09:59:27 -0700357
Ian Rogers23435d02012-09-24 11:23:12 -0700358 // Create storage for root classes, save away our work so far (requires descriptors).
Mathieu Chartierdaaf3262015-03-24 13:30:28 -0700359 class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class>>(
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -0700360 mirror::ObjectArray<mirror::Class>::Alloc(self, object_array_class.Get(),
361 kClassRootsMax));
362 CHECK(!class_roots_.IsNull());
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700363 SetClassRoot(kJavaLangClass, java_lang_Class.Get());
364 SetClassRoot(kJavaLangObject, java_lang_Object.Get());
365 SetClassRoot(kClassArrayClass, class_array_class.Get());
366 SetClassRoot(kObjectArrayClass, object_array_class.Get());
367 SetClassRoot(kCharArrayClass, char_array_class.Get());
368 SetClassRoot(kJavaLangString, java_lang_String.Get());
Fred Shih4ee7a662014-07-11 09:59:27 -0700369 SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference.Get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700370
371 // Setup the primitive type classes.
Ian Rogers50b35e22012-10-04 10:09:15 -0700372 SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass(self, Primitive::kPrimBoolean));
373 SetClassRoot(kPrimitiveByte, CreatePrimitiveClass(self, Primitive::kPrimByte));
374 SetClassRoot(kPrimitiveShort, CreatePrimitiveClass(self, Primitive::kPrimShort));
375 SetClassRoot(kPrimitiveInt, CreatePrimitiveClass(self, Primitive::kPrimInt));
376 SetClassRoot(kPrimitiveLong, CreatePrimitiveClass(self, Primitive::kPrimLong));
377 SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass(self, Primitive::kPrimFloat));
378 SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass(self, Primitive::kPrimDouble));
379 SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass(self, Primitive::kPrimVoid));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700380
Ian Rogers23435d02012-09-24 11:23:12 -0700381 // Create array interface entries to populate once we can load system classes.
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -0700382 array_iftable_ = GcRoot<mirror::IfTable>(AllocIfTable(self, 2));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700383
Ian Rogers23435d02012-09-24 11:23:12 -0700384 // Create int array type for AllocDexCache (done in AppendToBootClassPath).
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700385 Handle<mirror::Class> int_array_class(hs.NewHandle(
386 AllocClass(self, java_lang_Class.Get(), mirror::Array::ClassSize())));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700387 int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700388 mirror::IntArray::SetArrayClass(int_array_class.Get());
389 SetClassRoot(kIntArrayClass, int_array_class.Get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700390
Mathieu Chartierc7853442015-03-27 14:35:38 -0700391 // Create long array type for AllocDexCache (done in AppendToBootClassPath).
392 Handle<mirror::Class> long_array_class(hs.NewHandle(
393 AllocClass(self, java_lang_Class.Get(), mirror::Array::ClassSize())));
394 long_array_class->SetComponentType(GetClassRoot(kPrimitiveLong));
395 mirror::LongArray::SetArrayClass(long_array_class.Get());
396 SetClassRoot(kLongArrayClass, long_array_class.Get());
397
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700398 // now that these are registered, we can use AllocClass() and AllocObjectArray
Brian Carlstroma0808032011-07-18 00:39:23 -0700399
Ian Rogers52813c92012-10-11 11:50:38 -0700400 // Set up DexCache. This cannot be done later since AppendToBootClassPath calls AllocDexCache.
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700401 Handle<mirror::Class> java_lang_DexCache(hs.NewHandle(
402 AllocClass(self, java_lang_Class.Get(), mirror::DexCache::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700403 SetClassRoot(kJavaLangDexCache, java_lang_DexCache.Get());
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700404 java_lang_DexCache->SetObjectSize(mirror::DexCache::InstanceSize());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700405 mirror::Class::SetStatus(java_lang_DexCache, mirror::Class::kStatusResolved, self);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700406
Mathieu Chartierc7853442015-03-27 14:35:38 -0700407 // Constructor, Method, and AbstractMethod are necessary so
Brian Carlstromf3632832014-05-20 15:36:53 -0700408 // that FindClass can link members.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700409
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700410 Handle<mirror::Class> java_lang_reflect_ArtMethod(hs.NewHandle(
411 AllocClass(self, java_lang_Class.Get(), mirror::ArtMethod::ClassSize())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -0700412 CHECK(java_lang_reflect_ArtMethod.Get() != nullptr);
Jeff Haoc7d11882015-02-03 15:08:39 -0800413 size_t pointer_size = GetInstructionSetPointerSize(Runtime::Current()->GetInstructionSet());
414 java_lang_reflect_ArtMethod->SetObjectSize(mirror::ArtMethod::InstanceSize(pointer_size));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700415 SetClassRoot(kJavaLangReflectArtMethod, java_lang_reflect_ArtMethod.Get());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700416 mirror::Class::SetStatus(java_lang_reflect_ArtMethod, mirror::Class::kStatusResolved, self);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700417 mirror::ArtMethod::SetClass(java_lang_reflect_ArtMethod.Get());
Mathieu Chartier66f19252012-09-18 08:57:04 -0700418
419 // Set up array classes for string, field, method
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700420 Handle<mirror::Class> object_array_string(hs.NewHandle(
421 AllocClass(self, java_lang_Class.Get(),
422 mirror::ObjectArray<mirror::String>::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700423 object_array_string->SetComponentType(java_lang_String.Get());
424 SetClassRoot(kJavaLangStringArrayClass, object_array_string.Get());
Mathieu Chartier66f19252012-09-18 08:57:04 -0700425
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700426 Handle<mirror::Class> object_array_art_method(hs.NewHandle(
427 AllocClass(self, java_lang_Class.Get(),
428 mirror::ObjectArray<mirror::ArtMethod>::ClassSize())));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700429 object_array_art_method->SetComponentType(java_lang_reflect_ArtMethod.Get());
430 SetClassRoot(kJavaLangReflectArtMethodArrayClass, object_array_art_method.Get());
Ian Rogers4445a7e2012-10-05 17:19:13 -0700431
Ian Rogers23435d02012-09-24 11:23:12 -0700432 // Setup boot_class_path_ and register class_path now that we can use AllocObjectArray to create
433 // DexCache instances. Needs to be after String, Field, Method arrays since AllocDexCache uses
434 // these roots.
Mathieu Chartier66f19252012-09-18 08:57:04 -0700435 CHECK_NE(0U, boot_class_path.size());
Richard Uhlerfbef44d2014-12-23 09:48:51 -0800436 for (auto& dex_file : boot_class_path) {
437 CHECK(dex_file.get() != nullptr);
Ian Rogers7b078e82014-09-10 14:44:24 -0700438 AppendToBootClassPath(self, *dex_file);
Richard Uhlerfbef44d2014-12-23 09:48:51 -0800439 opened_dex_files_.push_back(std::move(dex_file));
Mathieu Chartier66f19252012-09-18 08:57:04 -0700440 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700441
442 // now we can use FindSystemClass
443
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700444 // run char class through InitializePrimitiveClass to finish init
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700445 InitializePrimitiveClass(char_class.Get(), Primitive::kPrimChar);
446 SetClassRoot(kPrimitiveChar, char_class.Get()); // needs descriptor
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700447
Jeff Hao88474b42013-10-23 16:24:40 -0700448 // Create runtime resolution and imt conflict methods. Also setup the default imt.
449 Runtime* runtime = Runtime::Current();
450 runtime->SetResolutionMethod(runtime->CreateResolutionMethod());
451 runtime->SetImtConflictMethod(runtime->CreateImtConflictMethod());
Mathieu Chartier2d2621a2014-10-23 16:48:06 -0700452 runtime->SetImtUnimplementedMethod(runtime->CreateImtConflictMethod());
Jeff Hao88474b42013-10-23 16:24:40 -0700453 runtime->SetDefaultImt(runtime->CreateDefaultImt(this));
454
Dmitry Petrochenkof0972a42014-05-16 17:43:39 +0700455 // Set up GenericJNI entrypoint. That is mainly a hack for common_compiler_test.h so that
456 // we do not need friend classes or a publicly exposed setter.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700457 quick_generic_jni_trampoline_ = GetQuickGenericJniStub();
Mathieu Chartiere5f13e52015-02-24 09:37:21 -0800458 if (!runtime->IsAotCompiler()) {
Alex Light64ad14d2014-08-19 14:23:13 -0700459 // We need to set up the generic trampolines since we don't have an image.
Ian Rogers6f3dbba2014-10-14 17:41:57 -0700460 quick_resolution_trampoline_ = GetQuickResolutionStub();
461 quick_imt_conflict_trampoline_ = GetQuickImtConflictStub();
462 quick_to_interpreter_bridge_trampoline_ = GetQuickToInterpreterBridge();
Alex Light64ad14d2014-08-19 14:23:13 -0700463 }
Dmitry Petrochenkof0972a42014-05-16 17:43:39 +0700464
Mathieu Chartier66f19252012-09-18 08:57:04 -0700465 // Object, String and DexCache need to be rerun through FindSystemClass to finish init
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700466 mirror::Class::SetStatus(java_lang_Object, mirror::Class::kStatusNotReady, self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700467 CHECK_EQ(java_lang_Object.Get(), FindSystemClass(self, "Ljava/lang/Object;"));
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700468 CHECK_EQ(java_lang_Object->GetObjectSize(), mirror::Object::InstanceSize());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700469 mirror::Class::SetStatus(java_lang_String, mirror::Class::kStatusNotReady, self);
Ian Rogers98379392014-02-24 16:53:16 -0800470 mirror::Class* String_class = FindSystemClass(self, "Ljava/lang/String;");
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700471 if (java_lang_String.Get() != String_class) {
472 std::ostringstream os1, os2;
473 java_lang_String->DumpClass(os1, mirror::Class::kDumpClassFullDetail);
474 String_class->DumpClass(os2, mirror::Class::kDumpClassFullDetail);
475 LOG(FATAL) << os1.str() << "\n\n" << os2.str();
476 }
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700477 mirror::Class::SetStatus(java_lang_DexCache, mirror::Class::kStatusNotReady, self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700478 CHECK_EQ(java_lang_DexCache.Get(), FindSystemClass(self, "Ljava/lang/DexCache;"));
Mingyao Yang98d1cc82014-05-15 17:02:16 -0700479 CHECK_EQ(java_lang_DexCache->GetObjectSize(), mirror::DexCache::InstanceSize());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700480
Ian Rogers23435d02012-09-24 11:23:12 -0700481 // Setup the primitive array type classes - can't be done until Object has a vtable.
Ian Rogers98379392014-02-24 16:53:16 -0800482 SetClassRoot(kBooleanArrayClass, FindSystemClass(self, "[Z"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800483 mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700484
Ian Rogers98379392014-02-24 16:53:16 -0800485 SetClassRoot(kByteArrayClass, FindSystemClass(self, "[B"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800486 mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700487
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700488 CHECK_EQ(char_array_class.Get(), FindSystemClass(self, "[C"));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700489
Ian Rogers98379392014-02-24 16:53:16 -0800490 SetClassRoot(kShortArrayClass, FindSystemClass(self, "[S"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800491 mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700492
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700493 CHECK_EQ(int_array_class.Get(), FindSystemClass(self, "[I"));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700494
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700495 CHECK_EQ(long_array_class.Get(), FindSystemClass(self, "[J"));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700496
Ian Rogers98379392014-02-24 16:53:16 -0800497 SetClassRoot(kFloatArrayClass, FindSystemClass(self, "[F"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800498 mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700499
Ian Rogers98379392014-02-24 16:53:16 -0800500 SetClassRoot(kDoubleArrayClass, FindSystemClass(self, "[D"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800501 mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700502
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700503 CHECK_EQ(class_array_class.Get(), FindSystemClass(self, "[Ljava/lang/Class;"));
Elliott Hughes418d20f2011-09-22 14:00:39 -0700504
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700505 CHECK_EQ(object_array_class.Get(), FindSystemClass(self, "[Ljava/lang/Object;"));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700506
Ian Rogers23435d02012-09-24 11:23:12 -0700507 // Setup the single, global copy of "iftable".
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700508 auto java_lang_Cloneable = hs.NewHandle(FindSystemClass(self, "Ljava/lang/Cloneable;"));
509 CHECK(java_lang_Cloneable.Get() != nullptr);
510 auto java_io_Serializable = hs.NewHandle(FindSystemClass(self, "Ljava/io/Serializable;"));
511 CHECK(java_io_Serializable.Get() != nullptr);
Ian Rogers23435d02012-09-24 11:23:12 -0700512 // We assume that Cloneable/Serializable don't have superinterfaces -- normally we'd have to
513 // crawl up and explicitly list all of the supers as well.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700514 array_iftable_.Read()->SetInterface(0, java_lang_Cloneable.Get());
515 array_iftable_.Read()->SetInterface(1, java_io_Serializable.Get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700516
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700517 // Sanity check Class[] and Object[]'s interfaces. GetDirectInterface may cause thread
518 // suspension.
519 CHECK_EQ(java_lang_Cloneable.Get(),
520 mirror::Class::GetDirectInterface(self, class_array_class, 0));
521 CHECK_EQ(java_io_Serializable.Get(),
522 mirror::Class::GetDirectInterface(self, class_array_class, 1));
523 CHECK_EQ(java_lang_Cloneable.Get(),
524 mirror::Class::GetDirectInterface(self, object_array_class, 0));
525 CHECK_EQ(java_io_Serializable.Get(),
526 mirror::Class::GetDirectInterface(self, object_array_class, 1));
Brian Carlstromea46f952013-07-30 01:26:50 -0700527 // Run Class, ArtField, and ArtMethod through FindSystemClass. This initializes their
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700528 // dex_cache_ fields and register them in class_table_.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700529 CHECK_EQ(java_lang_Class.Get(), FindSystemClass(self, "Ljava/lang/Class;"));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700530
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700531 mirror::Class::SetStatus(java_lang_reflect_ArtMethod, mirror::Class::kStatusNotReady, self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700532 CHECK_EQ(java_lang_reflect_ArtMethod.Get(),
533 FindSystemClass(self, "Ljava/lang/reflect/ArtMethod;"));
534 CHECK_EQ(object_array_string.Get(),
535 FindSystemClass(self, GetClassRootDescriptor(kJavaLangStringArrayClass)));
536 CHECK_EQ(object_array_art_method.Get(),
537 FindSystemClass(self, GetClassRootDescriptor(kJavaLangReflectArtMethodArrayClass)));
Brian Carlstrom1f870082011-08-23 16:02:11 -0700538
Ian Rogers23435d02012-09-24 11:23:12 -0700539 // End of special init trickery, subsequent classes may be loaded via FindSystemClass.
Ian Rogers466bb252011-10-14 03:29:56 -0700540
Ian Rogers23435d02012-09-24 11:23:12 -0700541 // Create java.lang.reflect.Proxy root.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700542 SetClassRoot(kJavaLangReflectProxy, FindSystemClass(self, "Ljava/lang/reflect/Proxy;"));
Ian Rogers466bb252011-10-14 03:29:56 -0700543
Mathieu Chartierdaaf3262015-03-24 13:30:28 -0700544 // Create java.lang.reflect.Field.class root.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700545 auto* class_root = FindSystemClass(self, "Ljava/lang/reflect/Field;");
546 CHECK(class_root != nullptr);
547 SetClassRoot(kJavaLangReflectField, class_root);
548 mirror::Field::SetClass(class_root);
Mathieu Chartierdaaf3262015-03-24 13:30:28 -0700549
550 // Create java.lang.reflect.Field array root.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700551 class_root = FindSystemClass(self, "[Ljava/lang/reflect/Field;");
552 CHECK(class_root != nullptr);
553 SetClassRoot(kJavaLangReflectFieldArrayClass, class_root);
554 mirror::Field::SetArrayClass(class_root);
555
556 // Create java.lang.reflect.Constructor.class root and array root.
557 class_root = FindSystemClass(self, "Ljava/lang/reflect/Constructor;");
558 CHECK(class_root != nullptr);
559 SetClassRoot(kJavaLangReflectConstructor, class_root);
560 mirror::Constructor::SetClass(class_root);
561 class_root = FindSystemClass(self, "[Ljava/lang/reflect/Constructor;");
562 CHECK(class_root != nullptr);
563 SetClassRoot(kJavaLangReflectConstructorArrayClass, class_root);
564 mirror::Constructor::SetArrayClass(class_root);
565
566 // Create java.lang.reflect.Method.class root and array root.
567 class_root = FindSystemClass(self, "Ljava/lang/reflect/Method;");
568 CHECK(class_root != nullptr);
569 SetClassRoot(kJavaLangReflectMethod, class_root);
570 mirror::Method::SetClass(class_root);
571 class_root = FindSystemClass(self, "[Ljava/lang/reflect/Method;");
572 CHECK(class_root != nullptr);
573 SetClassRoot(kJavaLangReflectMethodArrayClass, class_root);
574 mirror::Method::SetArrayClass(class_root);
Mathieu Chartierdaaf3262015-03-24 13:30:28 -0700575
Brian Carlstrom1f870082011-08-23 16:02:11 -0700576 // java.lang.ref classes need to be specially flagged, but otherwise are normal classes
Fred Shih4ee7a662014-07-11 09:59:27 -0700577 // finish initializing Reference class
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -0700578 mirror::Class::SetStatus(java_lang_ref_Reference, mirror::Class::kStatusNotReady, self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700579 CHECK_EQ(java_lang_ref_Reference.Get(), FindSystemClass(self, "Ljava/lang/ref/Reference;"));
Fred Shih4ee7a662014-07-11 09:59:27 -0700580 CHECK_EQ(java_lang_ref_Reference->GetObjectSize(), mirror::Reference::InstanceSize());
581 CHECK_EQ(java_lang_ref_Reference->GetClassSize(), mirror::Reference::ClassSize());
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700582 class_root = FindSystemClass(self, "Ljava/lang/ref/FinalizerReference;");
583 class_root->SetAccessFlags(class_root->GetAccessFlags() |
584 kAccClassIsReference | kAccClassIsFinalizerReference);
585 class_root = FindSystemClass(self, "Ljava/lang/ref/PhantomReference;");
586 class_root->SetAccessFlags(class_root->GetAccessFlags() | kAccClassIsReference |
587 kAccClassIsPhantomReference);
588 class_root = FindSystemClass(self, "Ljava/lang/ref/SoftReference;");
589 class_root->SetAccessFlags(class_root->GetAccessFlags() | kAccClassIsReference);
590 class_root = FindSystemClass(self, "Ljava/lang/ref/WeakReference;");
591 class_root->SetAccessFlags(class_root->GetAccessFlags() | kAccClassIsReference |
592 kAccClassIsWeakReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700593
Ian Rogers23435d02012-09-24 11:23:12 -0700594 // Setup the ClassLoader, verifying the object_size_.
Mathieu Chartierfc58af42015-04-16 18:00:39 -0700595 class_root = FindSystemClass(self, "Ljava/lang/ClassLoader;");
596 CHECK_EQ(class_root->GetObjectSize(), mirror::ClassLoader::InstanceSize());
597 SetClassRoot(kJavaLangClassLoader, class_root);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700598
jeffhao8cd6dda2012-02-22 10:15:34 -0800599 // Set up java.lang.Throwable, java.lang.ClassNotFoundException, and
Ian Rogers23435d02012-09-24 11:23:12 -0700600 // java.lang.StackTraceElement as a convenience.
Ian Rogers98379392014-02-24 16:53:16 -0800601 SetClassRoot(kJavaLangThrowable, FindSystemClass(self, "Ljava/lang/Throwable;"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800602 mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
Brian Carlstromf3632832014-05-20 15:36:53 -0700603 SetClassRoot(kJavaLangClassNotFoundException,
604 FindSystemClass(self, "Ljava/lang/ClassNotFoundException;"));
Ian Rogers98379392014-02-24 16:53:16 -0800605 SetClassRoot(kJavaLangStackTraceElement, FindSystemClass(self, "Ljava/lang/StackTraceElement;"));
Brian Carlstromf3632832014-05-20 15:36:53 -0700606 SetClassRoot(kJavaLangStackTraceElementArrayClass,
607 FindSystemClass(self, "[Ljava/lang/StackTraceElement;"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800608 mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700609
Andreas Gampe76bd8802014-12-10 16:43:58 -0800610 // Ensure void type is resolved in the core's dex cache so java.lang.Void is correctly
611 // initialized.
612 {
613 const DexFile& dex_file = java_lang_Object->GetDexFile();
614 const DexFile::StringId* void_string_id = dex_file.FindStringId("V");
615 CHECK(void_string_id != nullptr);
616 uint32_t void_string_index = dex_file.GetIndexForStringId(*void_string_id);
617 const DexFile::TypeId* void_type_id = dex_file.FindTypeId(void_string_index);
618 CHECK(void_type_id != nullptr);
619 uint16_t void_type_idx = dex_file.GetIndexForTypeId(*void_type_id);
620 // Now we resolve void type so the dex cache contains it. We use java.lang.Object class
621 // as referrer so the used dex cache is core's one.
622 mirror::Class* resolved_type = ResolveType(dex_file, void_type_idx, java_lang_Object.Get());
623 CHECK_EQ(resolved_type, GetClassRoot(kPrimitiveVoid));
624 self->AssertNoPendingException();
625 }
626
Ian Rogers98379392014-02-24 16:53:16 -0800627 FinishInit(self);
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700628
Brian Carlstroma004aa92012-02-08 18:05:09 -0800629 VLOG(startup) << "ClassLinker::InitFromCompiler exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700630}
631
Ian Rogers98379392014-02-24 16:53:16 -0800632void ClassLinker::FinishInit(Thread* self) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800633 VLOG(startup) << "ClassLinker::FinishInit entering";
Brian Carlstrom16192862011-09-12 17:50:06 -0700634
635 // Let the heap know some key offsets into java.lang.ref instances
Elliott Hughes20cde902011-10-04 17:37:27 -0700636 // Note: we hard code the field indexes here rather than using FindInstanceField
Brian Carlstrom16192862011-09-12 17:50:06 -0700637 // as the types of the field can't be resolved prior to the runtime being
638 // fully initialized
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800639 mirror::Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference);
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700640 mirror::Class* java_lang_ref_FinalizerReference =
Ian Rogers98379392014-02-24 16:53:16 -0800641 FindSystemClass(self, "Ljava/lang/ref/FinalizerReference;");
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800642
Mathieu Chartierc7853442015-03-27 14:35:38 -0700643 ArtField* pendingNext = java_lang_ref_Reference->GetInstanceField(0);
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -0700644 CHECK_STREQ(pendingNext->GetName(), "pendingNext");
645 CHECK_STREQ(pendingNext->GetTypeDescriptor(), "Ljava/lang/ref/Reference;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700646
Mathieu Chartierc7853442015-03-27 14:35:38 -0700647 ArtField* queue = java_lang_ref_Reference->GetInstanceField(1);
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -0700648 CHECK_STREQ(queue->GetName(), "queue");
649 CHECK_STREQ(queue->GetTypeDescriptor(), "Ljava/lang/ref/ReferenceQueue;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700650
Mathieu Chartierc7853442015-03-27 14:35:38 -0700651 ArtField* queueNext = java_lang_ref_Reference->GetInstanceField(2);
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -0700652 CHECK_STREQ(queueNext->GetName(), "queueNext");
653 CHECK_STREQ(queueNext->GetTypeDescriptor(), "Ljava/lang/ref/Reference;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700654
Mathieu Chartierc7853442015-03-27 14:35:38 -0700655 ArtField* referent = java_lang_ref_Reference->GetInstanceField(3);
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -0700656 CHECK_STREQ(referent->GetName(), "referent");
657 CHECK_STREQ(referent->GetTypeDescriptor(), "Ljava/lang/Object;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700658
Mathieu Chartierc7853442015-03-27 14:35:38 -0700659 ArtField* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2);
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -0700660 CHECK_STREQ(zombie->GetName(), "zombie");
661 CHECK_STREQ(zombie->GetTypeDescriptor(), "Ljava/lang/Object;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700662
Brian Carlstroma663ea52011-08-19 23:33:41 -0700663 // ensure all class_roots_ are initialized
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700664 for (size_t i = 0; i < kClassRootsMax; i++) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700665 ClassRoot class_root = static_cast<ClassRoot>(i);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800666 mirror::Class* klass = GetClassRoot(class_root);
Andreas Gampe2ed8def2014-08-28 14:41:02 -0700667 CHECK(klass != nullptr);
668 DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != nullptr);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700669 // note SetClassRoot does additional validation.
670 // if possible add new checks there to catch errors early
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700671 }
672
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -0700673 CHECK(!array_iftable_.IsNull());
Elliott Hughes92f14b22011-10-06 12:29:54 -0700674
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700675 // disable the slow paths in FindClass and CreatePrimitiveClass now
676 // that Object, Class, and Object[] are setup
677 init_done_ = true;
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700678
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800679 VLOG(startup) << "ClassLinker::FinishInit exiting";
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700680}
681
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700682void ClassLinker::RunRootClinits() {
683 Thread* self = Thread::Current();
684 for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800685 mirror::Class* c = GetClassRoot(ClassRoot(i));
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700686 if (!c->IsArrayClass() && !c->IsPrimitive()) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -0700687 StackHandleScope<1> hs(self);
688 Handle<mirror::Class> h_class(hs.NewHandle(GetClassRoot(ClassRoot(i))));
Ian Rogers7b078e82014-09-10 14:44:24 -0700689 EnsureInitialized(self, h_class, true, true);
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700690 self->AssertNoPendingException();
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700691 }
692 }
693}
694
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700695const OatFile* ClassLinker::RegisterOatFile(const OatFile* oat_file) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700696 WriterMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstrom0d6adac2014-02-05 17:39:16 -0800697 if (kIsDebugBuild) {
698 for (size_t i = 0; i < oat_files_.size(); ++i) {
699 CHECK_NE(oat_file, oat_files_[i]) << oat_file->GetLocation();
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700700 }
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800701 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700702 VLOG(class_linker) << "Registering " << oat_file->GetLocation();
703 oat_files_.push_back(oat_file);
704 return oat_file;
Brian Carlstrom866c8622012-01-06 16:35:13 -0800705}
706
Brian Carlstrom56d947f2013-07-15 13:14:23 -0700707OatFile& ClassLinker::GetImageOatFile(gc::space::ImageSpace* space) {
708 VLOG(startup) << "ClassLinker::GetImageOatFile entering";
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700709 OatFile* oat_file = space->ReleaseOatFile();
710 CHECK_EQ(RegisterOatFile(oat_file), oat_file);
Brian Carlstrom56d947f2013-07-15 13:14:23 -0700711 VLOG(startup) << "ClassLinker::GetImageOatFile exiting";
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700712 return *oat_file;
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700713}
714
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700715class DexFileAndClassPair : ValueObject {
716 public:
717 DexFileAndClassPair(const DexFile* dex_file, size_t current_class_index, bool from_loaded_oat)
718 : cached_descriptor_(GetClassDescriptor(dex_file, current_class_index)),
719 dex_file_(dex_file),
720 current_class_index_(current_class_index),
721 from_loaded_oat_(from_loaded_oat) {}
722
723 DexFileAndClassPair(const DexFileAndClassPair&) = default;
724
725 DexFileAndClassPair& operator=(const DexFileAndClassPair& rhs) {
726 cached_descriptor_ = rhs.cached_descriptor_;
727 dex_file_ = rhs.dex_file_;
728 current_class_index_ = rhs.current_class_index_;
729 from_loaded_oat_ = rhs.from_loaded_oat_;
730 return *this;
731 }
732
733 const char* GetCachedDescriptor() const {
734 return cached_descriptor_;
735 }
736
737 bool operator<(const DexFileAndClassPair& rhs) const {
738 const char* lhsDescriptor = cached_descriptor_;
739 const char* rhsDescriptor = rhs.cached_descriptor_;
740 int cmp = strcmp(lhsDescriptor, rhsDescriptor);
741 if (cmp != 0) {
Andreas Gampe0cba0042015-04-29 20:47:16 -0700742 // Note that the order must be reversed. We want to iterate over the classes in dex files.
743 // They are sorted lexicographically. Thus, the priority-queue must be a min-queue.
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700744 return cmp > 0;
745 }
746 return dex_file_ < rhs.dex_file_;
747 }
748
749 bool DexFileHasMoreClasses() const {
750 return current_class_index_ + 1 < dex_file_->NumClassDefs();
751 }
752
753 DexFileAndClassPair GetNext() const {
754 return DexFileAndClassPair(dex_file_, current_class_index_ + 1, from_loaded_oat_);
755 }
756
757 size_t GetCurrentClassIndex() const {
758 return current_class_index_;
759 }
760
761 bool FromLoadedOat() const {
762 return from_loaded_oat_;
763 }
764
765 const DexFile* GetDexFile() const {
766 return dex_file_;
767 }
768
Andreas Gampe0cba0042015-04-29 20:47:16 -0700769 void DeleteDexFile() {
770 delete dex_file_;
771 dex_file_ = nullptr;
772 }
773
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700774 private:
775 static const char* GetClassDescriptor(const DexFile* dex_file, size_t index) {
776 const DexFile::ClassDef& class_def = dex_file->GetClassDef(static_cast<uint16_t>(index));
777 return dex_file->StringByTypeIdx(class_def.class_idx_);
778 }
779
780 const char* cached_descriptor_;
781 const DexFile* dex_file_;
782 size_t current_class_index_;
783 bool from_loaded_oat_; // We only need to compare mismatches between what we load now
784 // and what was loaded before. Any old duplicates must have been
785 // OK, and any new "internal" duplicates are as well (they must
786 // be from multidex, which resolves correctly).
787};
788
789static void AddDexFilesFromOat(const OatFile* oat_file, bool already_loaded,
790 std::priority_queue<DexFileAndClassPair>* heap) {
791 const std::vector<const OatDexFile*>& oat_dex_files = oat_file->GetOatDexFiles();
792 for (const OatDexFile* oat_dex_file : oat_dex_files) {
793 std::string error;
794 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error);
795 if (dex_file.get() == nullptr) {
796 LOG(WARNING) << "Could not create dex file from oat file: " << error;
797 } else {
798 if (dex_file->NumClassDefs() > 0U) {
799 heap->emplace(dex_file.release(), 0U, already_loaded);
800 }
801 }
802 }
803}
804
Andreas Gampe0cba0042015-04-29 20:47:16 -0700805static void AddNext(DexFileAndClassPair* original,
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700806 std::priority_queue<DexFileAndClassPair>* heap) {
Andreas Gampe0cba0042015-04-29 20:47:16 -0700807 if (original->DexFileHasMoreClasses()) {
808 heap->push(original->GetNext());
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700809 } else {
810 // Need to delete the dex file.
Andreas Gampe0cba0042015-04-29 20:47:16 -0700811 original->DeleteDexFile();
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700812 }
813}
814
815static void FreeDexFilesInHeap(std::priority_queue<DexFileAndClassPair>* heap) {
816 while (!heap->empty()) {
817 delete heap->top().GetDexFile();
818 heap->pop();
819 }
820}
821
Sebastien Hertz0de11332015-05-13 12:14:05 +0200822const OatFile* ClassLinker::GetBootOatFile() {
823 // To grab the boot oat, look at the dex files in the boot classpath. Any of those is fine, as
824 // they were all compiled into the same oat file. So grab the first one, which is guaranteed to
825 // exist if the boot class-path isn't empty.
826 if (boot_class_path_.empty()) {
827 return nullptr;
828 }
829 const DexFile* boot_dex_file = boot_class_path_[0];
830 // Is it from an oat file?
831 if (boot_dex_file->GetOatDexFile() != nullptr) {
832 return boot_dex_file->GetOatDexFile()->GetOatFile();
833 }
834 return nullptr;
835}
836
837const OatFile* ClassLinker::GetPrimaryOatFile() {
838 ReaderMutexLock mu(Thread::Current(), dex_lock_);
839 const OatFile* boot_oat_file = GetBootOatFile();
840 if (boot_oat_file != nullptr) {
841 for (const OatFile* oat_file : oat_files_) {
842 if (oat_file != boot_oat_file) {
843 return oat_file;
844 }
845 }
846 }
847 return nullptr;
848}
849
Andreas Gampe94329d32015-04-24 20:22:06 -0700850// Check for class-def collisions in dex files.
851//
852// This works by maintaining a heap with one class from each dex file, sorted by the class
853// descriptor. Then a dex-file/class pair is continually removed from the heap and compared
854// against the following top element. If the descriptor is the same, it is now checked whether
855// the two elements agree on whether their dex file was from an already-loaded oat-file or the
856// new oat file. Any disagreement indicates a collision.
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700857bool ClassLinker::HasCollisions(const OatFile* oat_file, std::string* error_msg) {
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700858 // Dex files are registered late - once a class is actually being loaded. We have to compare
Andreas Gampe0cba0042015-04-29 20:47:16 -0700859 // against the open oat files. Take the dex_lock_ that protects oat_files_ accesses.
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700860 ReaderMutexLock mu(Thread::Current(), dex_lock_);
861
Andreas Gampe0cba0042015-04-29 20:47:16 -0700862 std::priority_queue<DexFileAndClassPair> queue;
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700863
864 // Add dex files from already loaded oat files, but skip boot.
865 {
Sebastien Hertz0de11332015-05-13 12:14:05 +0200866 const OatFile* boot_oat = GetBootOatFile();
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700867 for (const OatFile* loaded_oat_file : oat_files_) {
868 if (loaded_oat_file == boot_oat) {
869 continue;
870 }
Andreas Gampe0cba0042015-04-29 20:47:16 -0700871 AddDexFilesFromOat(loaded_oat_file, true, &queue);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700872 }
873 }
874
Andreas Gampe0cba0042015-04-29 20:47:16 -0700875 if (queue.empty()) {
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700876 // No other oat files, return early.
877 return false;
878 }
879
880 // Add dex files from the oat file to check.
Andreas Gampe0cba0042015-04-29 20:47:16 -0700881 AddDexFilesFromOat(oat_file, false, &queue);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700882
Andreas Gampe0cba0042015-04-29 20:47:16 -0700883 // Now drain the queue.
884 while (!queue.empty()) {
885 DexFileAndClassPair compare_pop = queue.top();
886 queue.pop();
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700887
888 // Compare against the following elements.
Andreas Gampe0cba0042015-04-29 20:47:16 -0700889 while (!queue.empty()) {
890 DexFileAndClassPair top = queue.top();
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700891
892 if (strcmp(compare_pop.GetCachedDescriptor(), top.GetCachedDescriptor()) == 0) {
893 // Same descriptor. Check whether it's crossing old-oat-files to new-oat-files.
894 if (compare_pop.FromLoadedOat() != top.FromLoadedOat()) {
895 *error_msg =
896 StringPrintf("Found duplicated class when checking oat files: '%s' in %s and %s",
897 compare_pop.GetCachedDescriptor(),
898 compare_pop.GetDexFile()->GetLocation().c_str(),
899 top.GetDexFile()->GetLocation().c_str());
Andreas Gampe0cba0042015-04-29 20:47:16 -0700900 FreeDexFilesInHeap(&queue);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700901 return true;
902 }
903 // Pop it.
Andreas Gampe0cba0042015-04-29 20:47:16 -0700904 queue.pop();
905 AddNext(&top, &queue);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700906 } else {
907 // Something else. Done here.
908 break;
909 }
910 }
Andreas Gampe0cba0042015-04-29 20:47:16 -0700911 AddNext(&compare_pop, &queue);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700912 }
913
914 return false;
915}
916
Richard Uhler66d874d2015-01-15 09:37:19 -0800917std::vector<std::unique_ptr<const DexFile>> ClassLinker::OpenDexFilesFromOat(
918 const char* dex_location, const char* oat_location,
919 std::vector<std::string>* error_msgs) {
920 CHECK(error_msgs != nullptr);
Calin Juravle621962a2014-09-02 15:53:55 +0100921
Richard Uhler66d874d2015-01-15 09:37:19 -0800922 // Verify we aren't holding the mutator lock, which could starve GC if we
923 // have to generate or relocate an oat file.
924 Locks::mutator_lock_->AssertNotHeld(Thread::Current());
925
926 OatFileAssistant oat_file_assistant(dex_location, oat_location, kRuntimeISA,
927 !Runtime::Current()->IsAotCompiler());
928
929 // Lock the target oat location to avoid races generating and loading the
930 // oat file.
931 std::string error_msg;
932 if (!oat_file_assistant.Lock(&error_msg)) {
933 // Don't worry too much if this fails. If it does fail, it's unlikely we
934 // can generate an oat file anyway.
935 VLOG(class_linker) << "OatFileAssistant::Lock: " << error_msg;
Andreas Gampe833a4852014-05-21 18:46:59 -0700936 }
937
Richard Uhler66d874d2015-01-15 09:37:19 -0800938 // Check if we already have an up-to-date oat file open.
939 const OatFile* source_oat_file = nullptr;
940 {
941 ReaderMutexLock mu(Thread::Current(), dex_lock_);
942 for (const OatFile* oat_file : oat_files_) {
943 CHECK(oat_file != nullptr);
944 if (oat_file_assistant.GivenOatFileIsUpToDate(*oat_file)) {
945 source_oat_file = oat_file;
946 break;
Andreas Gampe833a4852014-05-21 18:46:59 -0700947 }
948 }
Andreas Gampe833a4852014-05-21 18:46:59 -0700949 }
950
Richard Uhler66d874d2015-01-15 09:37:19 -0800951 // If we didn't have an up-to-date oat file open, try to load one from disk.
952 if (source_oat_file == nullptr) {
953 // Update the oat file on disk if we can. This may fail, but that's okay.
954 // Best effort is all that matters here.
955 if (!oat_file_assistant.MakeUpToDate(&error_msg)) {
956 LOG(WARNING) << error_msg;
Andreas Gampe833a4852014-05-21 18:46:59 -0700957 }
Andreas Gampe833a4852014-05-21 18:46:59 -0700958
Richard Uhler66d874d2015-01-15 09:37:19 -0800959 // Get the oat file on disk.
960 std::unique_ptr<OatFile> oat_file = oat_file_assistant.GetBestOatFile();
961 if (oat_file.get() != nullptr) {
Andreas Gampe0cba0042015-04-29 20:47:16 -0700962 // Take the file only if it has no collisions, or we must take it because of preopting.
963 bool accept_oat_file = !HasCollisions(oat_file.get(), &error_msg);
964 if (!accept_oat_file) {
965 // Failed the collision check. Print warning.
Andreas Gampe94329d32015-04-24 20:22:06 -0700966 if (Runtime::Current()->IsDexFileFallbackEnabled()) {
967 LOG(WARNING) << "Found duplicate classes, falling back to interpreter mode for "
968 << dex_location;
969 } else {
970 LOG(WARNING) << "Found duplicate classes, dex-file-fallback disabled, will be failing to "
971 " load classes for " << dex_location;
972 }
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700973 LOG(WARNING) << error_msg;
Andreas Gampe0cba0042015-04-29 20:47:16 -0700974
975 // However, if the app was part of /system and preopted, there is no original dex file
976 // available. In that case grudgingly accept the oat file.
977 if (!DexFile::MaybeDex(dex_location)) {
978 accept_oat_file = true;
979 LOG(WARNING) << "Dex location " << dex_location << " does not seem to include dex file. "
980 << "Allow oat file use. This is potentially dangerous.";
981 }
982 }
983
984 if (accept_oat_file) {
985 source_oat_file = oat_file.release();
986 RegisterOatFile(source_oat_file);
Andreas Gampeb9aec2c2015-04-23 22:23:47 -0700987 }
Andreas Gampe833a4852014-05-21 18:46:59 -0700988 }
989 }
990
Richard Uhler66d874d2015-01-15 09:37:19 -0800991 std::vector<std::unique_ptr<const DexFile>> dex_files;
Andreas Gampe833a4852014-05-21 18:46:59 -0700992
Richard Uhler66d874d2015-01-15 09:37:19 -0800993 // Load the dex files from the oat file.
994 if (source_oat_file != nullptr) {
995 dex_files = oat_file_assistant.LoadDexFiles(*source_oat_file, dex_location);
996 if (dex_files.empty()) {
997 error_msgs->push_back("Failed to open dex files from "
998 + source_oat_file->GetLocation());
Andreas Gampe833a4852014-05-21 18:46:59 -0700999 }
1000 }
1001
Richard Uhler66d874d2015-01-15 09:37:19 -08001002 // Fall back to running out of the original dex file if we couldn't load any
1003 // dex_files from the oat file.
1004 if (dex_files.empty()) {
Jean Christophe Beyler24e04aa2014-09-12 12:03:25 -07001005 if (Runtime::Current()->IsDexFileFallbackEnabled()) {
Richard Uhler66d874d2015-01-15 09:37:19 -08001006 if (!DexFile::Open(dex_location, dex_location, &error_msg, &dex_files)) {
1007 LOG(WARNING) << error_msg;
Andreas Gampe0cba0042015-04-29 20:47:16 -07001008 error_msgs->push_back("Failed to open dex files from " + std::string(dex_location));
Jean Christophe Beyler24e04aa2014-09-12 12:03:25 -07001009 }
1010 } else {
1011 error_msgs->push_back("Fallback mode disabled, skipping dex files.");
1012 }
Andreas Gampe833a4852014-05-21 18:46:59 -07001013 }
Richard Uhler66d874d2015-01-15 09:37:19 -08001014 return dex_files;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001015}
1016
Brian Carlstromae826982011-11-09 01:33:42 -08001017const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001018 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001019 for (size_t i = 0; i < oat_files_.size(); i++) {
1020 const OatFile* oat_file = oat_files_[i];
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001021 DCHECK(oat_file != nullptr);
Brian Carlstromae826982011-11-09 01:33:42 -08001022 if (oat_file->GetLocation() == oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001023 return oat_file;
1024 }
1025 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001026 return nullptr;
Brian Carlstromfad71432011-10-16 20:25:10 -07001027}
Brian Carlstromaded5f72011-10-07 17:15:04 -07001028
Mathieu Chartiera89d7ed2014-12-05 10:57:13 -08001029void ClassLinker::InitFromImageInterpretOnlyCallback(mirror::Object* obj, void* arg) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001030 ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001031 DCHECK(obj != nullptr);
1032 DCHECK(class_linker != nullptr);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001033 if (obj->IsArtMethod()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001034 mirror::ArtMethod* method = obj->AsArtMethod();
Ian Rogers848871b2013-08-05 10:56:33 -07001035 if (!method->IsNative()) {
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08001036 const size_t pointer_size = class_linker->image_pointer_size_;
Mathieu Chartiera89d7ed2014-12-05 10:57:13 -08001037 method->SetEntryPointFromInterpreterPtrSize(artInterpreterToInterpreterBridge, pointer_size);
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08001038 if (!method->IsRuntimeMethod() && method != Runtime::Current()->GetResolutionMethod()) {
Mathieu Chartiera89d7ed2014-12-05 10:57:13 -08001039 method->SetEntryPointFromQuickCompiledCodePtrSize(GetQuickToInterpreterBridge(),
1040 pointer_size);
Ian Rogers848871b2013-08-05 10:56:33 -07001041 }
1042 }
1043 }
1044}
1045
Mathieu Chartierc7853442015-03-27 14:35:38 -07001046void SanityCheckObjectsCallback(mirror::Object* obj, void* arg ATTRIBUTE_UNUSED)
1047 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
1048 DCHECK(obj != nullptr);
1049 CHECK(obj->GetClass() != nullptr) << "Null class " << obj;
1050 CHECK(obj->GetClass()->GetClass() != nullptr) << "Null class class " << obj;
1051 if (obj->IsClass()) {
1052 auto klass = obj->AsClass();
1053 ArtField* fields[2] = { klass->GetSFields(), klass->GetIFields() };
1054 size_t num_fields[2] = { klass->NumStaticFields(), klass->NumInstanceFields() };
1055 for (size_t i = 0; i < 2; ++i) {
1056 for (size_t j = 0; j < num_fields[i]; ++j) {
1057 CHECK_EQ(fields[i][j].GetDeclaringClass(), klass);
1058 }
1059 }
1060 }
1061}
1062
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001063void ClassLinker::InitFromImage() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001064 VLOG(startup) << "ClassLinker::InitFromImage entering";
Brian Carlstroma663ea52011-08-19 23:33:41 -07001065 CHECK(!init_done_);
1066
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07001067 Runtime* const runtime = Runtime::Current();
1068 Thread* const self = Thread::Current();
1069 gc::Heap* const heap = runtime->GetHeap();
1070 gc::space::ImageSpace* const space = heap->GetImageSpace();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001071 dex_cache_image_class_lookup_required_ = true;
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001072 CHECK(space != nullptr);
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001073 OatFile& oat_file = GetImageOatFile(space);
1074 CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatChecksum(), 0U);
1075 CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatDataBegin(), 0U);
Andreas Gampe22f8e5c2014-07-09 11:38:21 -07001076 const char* image_file_location = oat_file.GetOatHeader().
1077 GetStoreValueByKey(OatHeader::kImageLocationKey);
1078 CHECK(image_file_location == nullptr || *image_file_location == 0);
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001079 quick_resolution_trampoline_ = oat_file.GetOatHeader().GetQuickResolutionTrampoline();
Jeff Hao88474b42013-10-23 16:24:40 -07001080 quick_imt_conflict_trampoline_ = oat_file.GetOatHeader().GetQuickImtConflictTrampoline();
Andreas Gampe2da88232014-02-27 12:26:20 -08001081 quick_generic_jni_trampoline_ = oat_file.GetOatHeader().GetQuickGenericJniTrampoline();
Vladimir Marko8a630572014-04-09 18:45:35 +01001082 quick_to_interpreter_bridge_trampoline_ = oat_file.GetOatHeader().GetQuickToInterpreterBridge();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001083 mirror::Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
1084 mirror::ObjectArray<mirror::DexCache>* dex_caches =
1085 dex_caches_object->AsObjectArray<mirror::DexCache>();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001086
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001087 StackHandleScope<1> hs(self);
1088 Handle<mirror::ObjectArray<mirror::Class>> class_roots(hs.NewHandle(
1089 space->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots)->
1090 AsObjectArray<mirror::Class>()));
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07001091 class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class>>(class_roots.Get());
Mathieu Chartier02b6a782012-10-26 13:51:26 -07001092
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001093 // Special case of setting up the String class early so that we can test arbitrary objects
1094 // as being Strings or not
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001095 mirror::String::SetClass(GetClassRoot(kJavaLangString));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001096
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001097 CHECK_EQ(oat_file.GetOatHeader().GetDexFileCount(),
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001098 static_cast<uint32_t>(dex_caches->GetLength()));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001099 for (int32_t i = 0; i < dex_caches->GetLength(); i++) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08001100 StackHandleScope<1> hs2(self);
1101 Handle<mirror::DexCache> dex_cache(hs2.NewHandle(dex_caches->Get(i)));
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001102 const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8());
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001103 const OatFile::OatDexFile* oat_dex_file = oat_file.GetOatDexFile(dex_file_location.c_str(),
1104 nullptr);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001105 CHECK(oat_dex_file != nullptr) << oat_file.GetLocation() << " " << dex_file_location;
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001106 std::string error_msg;
Richard Uhlerfbef44d2014-12-23 09:48:51 -08001107 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg);
1108 if (dex_file.get() == nullptr) {
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001109 LOG(FATAL) << "Failed to open dex file " << dex_file_location
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001110 << " from within oat file " << oat_file.GetLocation()
1111 << " error '" << error_msg << "'";
Ian Rogerse0a02da2014-12-02 14:10:53 -08001112 UNREACHABLE();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001113 }
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001114
1115 CHECK_EQ(dex_file->GetLocationChecksum(), oat_dex_file->GetDexFileLocationChecksum());
1116
Richard Uhlerfbef44d2014-12-23 09:48:51 -08001117 AppendToBootClassPath(*dex_file.get(), dex_cache);
1118 opened_dex_files_.push_back(std::move(dex_file));
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001119 }
1120
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001121 // Set classes on AbstractMethod early so that IsMethod tests can be performed during the live
1122 // bitmap walk.
Brian Carlstromea46f952013-07-30 01:26:50 -07001123 mirror::ArtMethod::SetClass(GetClassRoot(kJavaLangReflectArtMethod));
Mathieu Chartier2d721012014-11-10 11:08:06 -08001124 size_t art_method_object_size = mirror::ArtMethod::GetJavaLangReflectArtMethod()->GetObjectSize();
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07001125 if (!runtime->IsAotCompiler()) {
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08001126 // Aot compiler supports having an image with a different pointer size than the runtime. This
Mathieu Chartier2d721012014-11-10 11:08:06 -08001127 // happens on the host for compile 32 bit tests since we use a 64 bit libart compiler. We may
1128 // also use 32 bit dex2oat on a system with 64 bit apps.
1129 CHECK_EQ(art_method_object_size, mirror::ArtMethod::InstanceSize(sizeof(void*)))
1130 << sizeof(void*);
1131 }
1132 if (art_method_object_size == mirror::ArtMethod::InstanceSize(4)) {
1133 image_pointer_size_ = 4;
1134 } else {
1135 CHECK_EQ(art_method_object_size, mirror::ArtMethod::InstanceSize(8));
1136 image_pointer_size_ = 8;
1137 }
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001138
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001139 // Set entry point to interpreter if in InterpretOnly mode.
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08001140 if (!runtime->IsAotCompiler() && runtime->GetInstrumentation()->InterpretOnly()) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001141 heap->VisitObjects(InitFromImageInterpretOnlyCallback, this);
Mathieu Chartierb062fdd2012-07-03 09:51:48 -07001142 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07001143 if (kSanityCheckObjects) {
1144 for (int32_t i = 0; i < dex_caches->GetLength(); i++) {
1145 auto* dex_cache = dex_caches->Get(i);
1146 for (size_t j = 0; j < dex_cache->NumResolvedFields(); ++j) {
1147 auto* field = dex_cache->GetResolvedField(j, image_pointer_size_);
1148 if (field != nullptr) {
1149 CHECK(field->GetDeclaringClass()->GetClass() != nullptr);
1150 }
1151 }
1152 }
1153 heap->VisitObjects(SanityCheckObjectsCallback, nullptr);
1154 }
Brian Carlstroma663ea52011-08-19 23:33:41 -07001155
1156 // reinit class_roots_
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001157 mirror::Class::SetClassClass(class_roots->Get(kJavaLangClass));
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07001158 class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class>>(class_roots.Get());
Brian Carlstroma663ea52011-08-19 23:33:41 -07001159
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001160 // reinit array_iftable_ from any array class instance, they should be ==
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07001161 array_iftable_ = GcRoot<mirror::IfTable>(GetClassRoot(kObjectArrayClass)->GetIfTable());
Mathieu Chartier2d721012014-11-10 11:08:06 -08001162 DCHECK_EQ(array_iftable_.Read(), GetClassRoot(kBooleanArrayClass)->GetIfTable());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001163 // String class root was set above
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07001164 mirror::Field::SetClass(GetClassRoot(kJavaLangReflectField));
1165 mirror::Field::SetArrayClass(GetClassRoot(kJavaLangReflectFieldArrayClass));
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001166 mirror::Constructor::SetClass(GetClassRoot(kJavaLangReflectConstructor));
1167 mirror::Constructor::SetArrayClass(GetClassRoot(kJavaLangReflectConstructorArrayClass));
1168 mirror::Method::SetClass(GetClassRoot(kJavaLangReflectMethod));
1169 mirror::Method::SetArrayClass(GetClassRoot(kJavaLangReflectMethodArrayClass));
Fred Shih4ee7a662014-07-11 09:59:27 -07001170 mirror::Reference::SetClass(GetClassRoot(kJavaLangRefReference));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001171 mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
1172 mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
1173 mirror::CharArray::SetArrayClass(GetClassRoot(kCharArrayClass));
1174 mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
1175 mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
1176 mirror::IntArray::SetArrayClass(GetClassRoot(kIntArrayClass));
1177 mirror::LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
1178 mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
1179 mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
1180 mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Brian Carlstroma663ea52011-08-19 23:33:41 -07001181
Ian Rogers98379392014-02-24 16:53:16 -08001182 FinishInit(self);
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -07001183
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001184 VLOG(startup) << "ClassLinker::InitFromImage exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -07001185}
1186
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001187void ClassLinker::VisitClassRoots(RootVisitor* visitor, VisitRootFlags flags) {
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001188 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc7853442015-03-27 14:35:38 -07001189 BufferedRootVisitor<kDefaultBufferedRootCount> buffered_visitor(
1190 visitor, RootInfo(kRootStickyClass));
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001191 if ((flags & kVisitRootFlagAllRoots) != 0) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001192 for (GcRoot<mirror::Class>& root : class_table_) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001193 buffered_visitor.VisitRoot(root);
Mathieu Chartierc7853442015-03-27 14:35:38 -07001194 root.Read()->VisitFieldRoots(buffered_visitor);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001195 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07001196 // PreZygote classes can't move so we won't need to update fields' declaring classes.
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001197 for (GcRoot<mirror::Class>& root : pre_zygote_class_table_) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001198 buffered_visitor.VisitRoot(root);
Mathieu Chartierc7853442015-03-27 14:35:38 -07001199 root.Read()->VisitFieldRoots(buffered_visitor);
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001200 }
1201 } else if ((flags & kVisitRootFlagNewRoots) != 0) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001202 for (auto& root : new_class_roots_) {
1203 mirror::Class* old_ref = root.Read<kWithoutReadBarrier>();
Mathieu Chartierc7853442015-03-27 14:35:38 -07001204 old_ref->VisitFieldRoots(buffered_visitor);
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001205 root.VisitRoot(visitor, RootInfo(kRootStickyClass));
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001206 mirror::Class* new_ref = root.Read<kWithoutReadBarrier>();
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07001207 if (UNLIKELY(new_ref != old_ref)) {
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001208 // Uh ohes, GC moved a root in the log. Need to search the class_table and update the
1209 // corresponding object. This is slow, but luckily for us, this may only happen with a
1210 // concurrent moving GC.
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001211 auto it = class_table_.Find(GcRoot<mirror::Class>(old_ref));
Mathieu Chartiere34fa1d2015-01-14 14:55:47 -08001212 DCHECK(it != class_table_.end());
1213 *it = GcRoot<mirror::Class>(new_ref);
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001214 }
1215 }
1216 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07001217 buffered_visitor.Flush(); // Flush before clearing new_class_roots_.
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001218 if ((flags & kVisitRootFlagClearRootLog) != 0) {
1219 new_class_roots_.clear();
1220 }
1221 if ((flags & kVisitRootFlagStartLoggingNewRoots) != 0) {
1222 log_new_class_table_roots_ = true;
1223 } else if ((flags & kVisitRootFlagStopLoggingNewRoots) != 0) {
1224 log_new_class_table_roots_ = false;
1225 }
1226 // We deliberately ignore the class roots in the image since we
1227 // handle image roots by using the MS/CMS rescanning of dirty cards.
1228}
1229
Brian Carlstroma663ea52011-08-19 23:33:41 -07001230// Keep in sync with InitCallback. Anything we visit, we need to
1231// reinit references to when reinitializing a ClassLinker from a
1232// mapped image.
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001233void ClassLinker::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) {
1234 class_roots_.VisitRoot(visitor, RootInfo(kRootVMInternal));
1235 Thread* const self = Thread::Current();
Elliott Hughesf8349362012-06-18 15:00:06 -07001236 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001237 ReaderMutexLock mu(self, dex_lock_);
Mathieu Chartier893263b2014-03-04 11:07:42 -08001238 if ((flags & kVisitRootFlagAllRoots) != 0) {
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07001239 for (GcRoot<mirror::DexCache>& dex_cache : dex_caches_) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001240 dex_cache.VisitRoot(visitor, RootInfo(kRootVMInternal));
Mathieu Chartierc4621982013-09-16 19:43:47 -07001241 }
Mathieu Chartier893263b2014-03-04 11:07:42 -08001242 } else if ((flags & kVisitRootFlagNewRoots) != 0) {
1243 for (size_t index : new_dex_cache_roots_) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001244 dex_caches_[index].VisitRoot(visitor, RootInfo(kRootVMInternal));
Mathieu Chartierc4621982013-09-16 19:43:47 -07001245 }
Elliott Hughesf8349362012-06-18 15:00:06 -07001246 }
Mathieu Chartier893263b2014-03-04 11:07:42 -08001247 if ((flags & kVisitRootFlagClearRootLog) != 0) {
1248 new_dex_cache_roots_.clear();
1249 }
1250 if ((flags & kVisitRootFlagStartLoggingNewRoots) != 0) {
1251 log_new_dex_caches_roots_ = true;
1252 } else if ((flags & kVisitRootFlagStopLoggingNewRoots) != 0) {
1253 log_new_dex_caches_roots_ = false;
1254 }
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001255 }
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001256 VisitClassRoots(visitor, flags);
1257 array_iftable_.VisitRoot(visitor, RootInfo(kRootVMInternal));
Ian Rogers98379392014-02-24 16:53:16 -08001258 for (size_t i = 0; i < kFindArrayCacheSize; ++i) {
Mathieu Chartierbb87e0f2015-04-03 11:21:55 -07001259 find_array_class_cache_[i].VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal));
Ian Rogers98379392014-02-24 16:53:16 -08001260 }
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001261}
1262
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001263void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) {
1264 if (dex_cache_image_class_lookup_required_) {
1265 MoveImageClassesToClassTable();
Elliott Hughesa2155262011-11-16 16:26:58 -08001266 }
Ian Rogersdbf3be02014-08-29 15:40:08 -07001267 // TODO: why isn't this a ReaderMutexLock?
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001268 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001269 for (GcRoot<mirror::Class>& root : class_table_) {
1270 if (!visitor(root.Read(), arg)) {
1271 return;
1272 }
1273 }
1274 for (GcRoot<mirror::Class>& root : pre_zygote_class_table_) {
1275 if (!visitor(root.Read(), arg)) {
Elliott Hughesa2155262011-11-16 16:26:58 -08001276 return;
1277 }
1278 }
1279}
1280
Ian Rogersdbf3be02014-08-29 15:40:08 -07001281static bool GetClassesVisitorSet(mirror::Class* c, void* arg) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001282 std::set<mirror::Class*>* classes = reinterpret_cast<std::set<mirror::Class*>*>(arg);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001283 classes->insert(c);
1284 return true;
1285}
1286
Ian Rogersdbf3be02014-08-29 15:40:08 -07001287struct GetClassesVisitorArrayArg {
1288 Handle<mirror::ObjectArray<mirror::Class>>* classes;
1289 int32_t index;
1290 bool success;
1291};
1292
1293static bool GetClassesVisitorArray(mirror::Class* c, void* varg)
1294 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
1295 GetClassesVisitorArrayArg* arg = reinterpret_cast<GetClassesVisitorArrayArg*>(varg);
1296 if (arg->index < (*arg->classes)->GetLength()) {
1297 (*arg->classes)->Set(arg->index, c);
1298 arg->index++;
1299 return true;
1300 } else {
1301 arg->success = false;
1302 return false;
1303 }
1304}
1305
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001306void ClassLinker::VisitClassesWithoutClassesLock(ClassVisitor* visitor, void* arg) {
Ian Rogersdbf3be02014-08-29 15:40:08 -07001307 // TODO: it may be possible to avoid secondary storage if we iterate over dex caches. The problem
1308 // is avoiding duplicates.
1309 if (!kMovingClasses) {
1310 std::set<mirror::Class*> classes;
1311 VisitClasses(GetClassesVisitorSet, &classes);
1312 for (mirror::Class* klass : classes) {
1313 if (!visitor(klass, arg)) {
1314 return;
1315 }
1316 }
1317 } else {
1318 Thread* self = Thread::Current();
1319 StackHandleScope<1> hs(self);
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07001320 MutableHandle<mirror::ObjectArray<mirror::Class>> classes =
Ian Rogersdbf3be02014-08-29 15:40:08 -07001321 hs.NewHandle<mirror::ObjectArray<mirror::Class>>(nullptr);
1322 GetClassesVisitorArrayArg local_arg;
1323 local_arg.classes = &classes;
1324 local_arg.success = false;
1325 // We size the array assuming classes won't be added to the class table during the visit.
1326 // If this assumption fails we iterate again.
1327 while (!local_arg.success) {
1328 size_t class_table_size;
1329 {
Ian Rogers7b078e82014-09-10 14:44:24 -07001330 ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08001331 class_table_size = class_table_.Size() + pre_zygote_class_table_.Size();
Ian Rogersdbf3be02014-08-29 15:40:08 -07001332 }
1333 mirror::Class* class_type = mirror::Class::GetJavaLangClass();
1334 mirror::Class* array_of_class = FindArrayClass(self, &class_type);
1335 classes.Assign(
1336 mirror::ObjectArray<mirror::Class>::Alloc(self, array_of_class, class_table_size));
1337 CHECK(classes.Get() != nullptr); // OOME.
1338 local_arg.index = 0;
1339 local_arg.success = true;
1340 VisitClasses(GetClassesVisitorArray, &local_arg);
1341 }
1342 for (int32_t i = 0; i < classes->GetLength(); ++i) {
1343 // If the class table shrank during creation of the clases array we expect null elements. If
1344 // the class table grew then the loop repeats. If classes are created after the loop has
1345 // finished then we don't visit.
1346 mirror::Class* klass = classes->Get(i);
1347 if (klass != nullptr && !visitor(klass, arg)) {
1348 return;
1349 }
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001350 }
1351 }
1352}
1353
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001354ClassLinker::~ClassLinker() {
Brian Carlstromea46f952013-07-30 01:26:50 -07001355 mirror::ArtMethod::ResetClass();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001356 mirror::Class::ResetClass();
1357 mirror::Constructor::ResetClass();
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07001358 mirror::Field::ResetClass();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001359 mirror::Method::ResetClass();
1360 mirror::Reference::ResetClass();
1361 mirror::StackTraceElement::ResetClass();
1362 mirror::String::ResetClass();
1363 mirror::Throwable::ResetClass();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001364 mirror::BooleanArray::ResetArrayClass();
1365 mirror::ByteArray::ResetArrayClass();
1366 mirror::CharArray::ResetArrayClass();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001367 mirror::Constructor::ResetArrayClass();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001368 mirror::DoubleArray::ResetArrayClass();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001369 mirror::Field::ResetArrayClass();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001370 mirror::FloatArray::ResetArrayClass();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07001371 mirror::Method::ResetArrayClass();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001372 mirror::IntArray::ResetArrayClass();
1373 mirror::LongArray::ResetArrayClass();
1374 mirror::ShortArray::ResetArrayClass();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001375 STLDeleteElements(&oat_files_);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001376}
1377
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001378mirror::DexCache* ClassLinker::AllocDexCache(Thread* self, const DexFile& dex_file) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07001379 gc::Heap* const heap = Runtime::Current()->GetHeap();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001380 StackHandleScope<16> hs(self);
1381 Handle<mirror::Class> dex_cache_class(hs.NewHandle(GetClassRoot(kJavaLangDexCache)));
1382 Handle<mirror::DexCache> dex_cache(
1383 hs.NewHandle(down_cast<mirror::DexCache*>(
1384 heap->AllocObject<true>(self, dex_cache_class.Get(), dex_cache_class->GetObjectSize(),
1385 VoidFunctor()))));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001386 if (dex_cache.Get() == nullptr) {
1387 return nullptr;
Elliott Hughes30646832011-10-13 16:59:46 -07001388 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001389 Handle<mirror::String>
1390 location(hs.NewHandle(intern_table_->InternStrong(dex_file.GetLocation().c_str())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001391 if (location.Get() == nullptr) {
1392 return nullptr;
Elliott Hughes30646832011-10-13 16:59:46 -07001393 }
Ian Rogers700a4022014-05-19 16:49:03 -07001394 Handle<mirror::ObjectArray<mirror::String>>
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001395 strings(hs.NewHandle(AllocStringArray(self, dex_file.NumStringIds())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001396 if (strings.Get() == nullptr) {
1397 return nullptr;
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001398 }
Ian Rogers700a4022014-05-19 16:49:03 -07001399 Handle<mirror::ObjectArray<mirror::Class>>
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001400 types(hs.NewHandle(AllocClassArray(self, dex_file.NumTypeIds())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001401 if (types.Get() == nullptr) {
1402 return nullptr;
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001403 }
Ian Rogers700a4022014-05-19 16:49:03 -07001404 Handle<mirror::ObjectArray<mirror::ArtMethod>>
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001405 methods(hs.NewHandle(AllocArtMethodArray(self, dex_file.NumMethodIds())));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001406 if (methods.Get() == nullptr) {
1407 return nullptr;
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001408 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07001409 Handle<mirror::Array> fields;
Roland Levillainf39c9eb2015-05-26 15:02:07 +01001410 if (image_pointer_size_ == 8u) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07001411 fields = hs.NewHandle<mirror::Array>(mirror::LongArray::Alloc(self, dex_file.NumFieldIds()));
1412 } else {
Roland Levillainf39c9eb2015-05-26 15:02:07 +01001413 DCHECK_EQ(image_pointer_size_, 4u);
Mathieu Chartierc7853442015-03-27 14:35:38 -07001414 fields = hs.NewHandle<mirror::Array>(mirror::IntArray::Alloc(self, dex_file.NumFieldIds()));
1415 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001416 if (fields.Get() == nullptr) {
1417 return nullptr;
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001418 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001419 dex_cache->Init(&dex_file, location.Get(), strings.Get(), types.Get(), methods.Get(),
1420 fields.Get());
1421 return dex_cache.Get();
Brian Carlstroma0808032011-07-18 00:39:23 -07001422}
1423
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001424mirror::Class* ClassLinker::AllocClass(Thread* self, mirror::Class* java_lang_Class,
Ian Rogers6fac4472014-02-25 17:01:10 -08001425 uint32_t class_size) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001426 DCHECK_GE(class_size, sizeof(mirror::Class));
Ian Rogers1d54e732013-05-02 21:10:01 -07001427 gc::Heap* heap = Runtime::Current()->GetHeap();
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001428 mirror::Class::InitializeClassVisitor visitor(class_size);
Mathieu Chartier52e4b432014-06-10 11:22:31 -07001429 mirror::Object* k = kMovingClasses ?
Brian Carlstromf3632832014-05-20 15:36:53 -07001430 heap->AllocObject<true>(self, java_lang_Class, class_size, visitor) :
1431 heap->AllocNonMovableObject<true>(self, java_lang_Class, class_size, visitor);
Ian Rogers6fac4472014-02-25 17:01:10 -08001432 if (UNLIKELY(k == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07001433 CHECK(self->IsExceptionPending()); // OOME.
Ian Rogers6fac4472014-02-25 17:01:10 -08001434 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07001435 }
Ian Rogers6fac4472014-02-25 17:01:10 -08001436 return k->AsClass();
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001437}
1438
Ian Rogers6fac4472014-02-25 17:01:10 -08001439mirror::Class* ClassLinker::AllocClass(Thread* self, uint32_t class_size) {
Ian Rogers50b35e22012-10-04 10:09:15 -07001440 return AllocClass(self, GetClassRoot(kJavaLangClass), class_size);
Brian Carlstroma0808032011-07-18 00:39:23 -07001441}
1442
Brian Carlstromea46f952013-07-30 01:26:50 -07001443mirror::ArtMethod* ClassLinker::AllocArtMethod(Thread* self) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001444 return down_cast<mirror::ArtMethod*>(
Mathieu Chartiercbb2d202013-11-14 17:45:16 -08001445 GetClassRoot(kJavaLangReflectArtMethod)->AllocNonMovableObject(self));
Mathieu Chartier66f19252012-09-18 08:57:04 -07001446}
1447
Mathieu Chartier590fee92013-09-13 13:46:47 -07001448mirror::ObjectArray<mirror::StackTraceElement>* ClassLinker::AllocStackTraceElementArray(
1449 Thread* self, size_t length) {
1450 return mirror::ObjectArray<mirror::StackTraceElement>::Alloc(
1451 self, GetClassRoot(kJavaLangStackTraceElementArrayClass), length);
Shih-wei Liao55df06b2011-08-26 14:39:27 -07001452}
1453
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001454mirror::Class* ClassLinker::EnsureResolved(Thread* self, const char* descriptor,
1455 mirror::Class* klass) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001456 DCHECK(klass != nullptr);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001457
1458 // For temporary classes we must wait for them to be retired.
1459 if (init_done_ && klass->IsTemp()) {
1460 CHECK(!klass->IsResolved());
1461 if (klass->IsErroneous()) {
1462 ThrowEarlierClassFailure(klass);
1463 return nullptr;
1464 }
1465 StackHandleScope<1> hs(self);
1466 Handle<mirror::Class> h_class(hs.NewHandle(klass));
1467 ObjectLock<mirror::Class> lock(self, h_class);
1468 // Loop and wait for the resolving thread to retire this class.
1469 while (!h_class->IsRetired() && !h_class->IsErroneous()) {
1470 lock.WaitIgnoringInterrupts();
1471 }
1472 if (h_class->IsErroneous()) {
1473 ThrowEarlierClassFailure(h_class.Get());
1474 return nullptr;
1475 }
1476 CHECK(h_class->IsRetired());
1477 // Get the updated class from class table.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001478 klass = LookupClass(self, descriptor, ComputeModifiedUtf8Hash(descriptor),
1479 h_class.Get()->GetClassLoader());
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001480 }
1481
Brian Carlstromaded5f72011-10-07 17:15:04 -07001482 // Wait for the class if it has not already been linked.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001483 if (!klass->IsResolved() && !klass->IsErroneous()) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001484 StackHandleScope<1> hs(self);
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07001485 HandleWrapper<mirror::Class> h_class(hs.NewHandleWrapper(&klass));
1486 ObjectLock<mirror::Class> lock(self, h_class);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001487 // Check for circular dependencies between classes.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001488 if (!h_class->IsResolved() && h_class->GetClinitThreadId() == self->GetTid()) {
1489 ThrowClassCircularityError(h_class.Get());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07001490 mirror::Class::SetStatus(h_class, mirror::Class::kStatusError, self);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001491 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001492 }
1493 // Wait for the pending initialization to complete.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001494 while (!h_class->IsResolved() && !h_class->IsErroneous()) {
Ian Rogers05f30572013-02-20 12:13:11 -08001495 lock.WaitIgnoringInterrupts();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001496 }
1497 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001498
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001499 if (klass->IsErroneous()) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001500 ThrowEarlierClassFailure(klass);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001501 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001502 }
1503 // Return the loaded class. No exceptions should be pending.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001504 CHECK(klass->IsResolved()) << PrettyClass(klass);
Ian Rogers62d6c772013-02-27 08:32:07 -08001505 self->AssertNoPendingException();
Brian Carlstromaded5f72011-10-07 17:15:04 -07001506 return klass;
1507}
1508
Ian Rogers68b56852014-08-29 20:19:11 -07001509typedef std::pair<const DexFile*, const DexFile::ClassDef*> ClassPathEntry;
1510
1511// Search a collection of DexFiles for a descriptor
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001512ClassPathEntry FindInClassPath(const char* descriptor,
1513 size_t hash, const std::vector<const DexFile*>& class_path) {
1514 for (const DexFile* dex_file : class_path) {
1515 const DexFile::ClassDef* dex_class_def = dex_file->FindClassDef(descriptor, hash);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001516 if (dex_class_def != nullptr) {
Ian Rogers68b56852014-08-29 20:19:11 -07001517 return ClassPathEntry(dex_file, dex_class_def);
1518 }
1519 }
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001520 return ClassPathEntry(nullptr, nullptr);
Ian Rogers68b56852014-08-29 20:19:11 -07001521}
1522
Andreas Gampef865ea92015-04-13 22:14:19 -07001523static bool IsBootClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
1524 mirror::ClassLoader* class_loader)
1525 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
1526 return class_loader == nullptr ||
1527 class_loader->GetClass() ==
1528 soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_BootClassLoader);
1529}
1530
1531bool ClassLinker::FindClassInPathClassLoader(ScopedObjectAccessAlreadyRunnable& soa,
1532 Thread* self, const char* descriptor,
1533 size_t hash,
1534 Handle<mirror::ClassLoader> class_loader,
1535 mirror::Class** result) {
1536 // Termination case: boot class-loader.
1537 if (IsBootClassLoader(soa, class_loader.Get())) {
1538 // The boot class loader, search the boot class path.
1539 ClassPathEntry pair = FindInClassPath(descriptor, hash, boot_class_path_);
1540 if (pair.second != nullptr) {
1541 mirror::Class* klass = LookupClass(self, descriptor, hash, nullptr);
1542 if (klass != nullptr) {
1543 *result = EnsureResolved(self, descriptor, klass);
1544 } else {
1545 *result = DefineClass(self, descriptor, hash, NullHandle<mirror::ClassLoader>(),
1546 *pair.first, *pair.second);
1547 }
1548 if (*result == nullptr) {
1549 CHECK(self->IsExceptionPending()) << descriptor;
1550 self->ClearException();
1551 }
Ian Rogers32427292014-11-19 14:05:21 -08001552 } else {
Andreas Gampef865ea92015-04-13 22:14:19 -07001553 *result = nullptr;
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001554 }
Andreas Gampef865ea92015-04-13 22:14:19 -07001555 return true;
1556 }
1557
1558 // Unsupported class-loader?
1559 if (class_loader->GetClass() !=
1560 soa.Decode<mirror::Class*>(WellKnownClasses::dalvik_system_PathClassLoader)) {
1561 *result = nullptr;
1562 return false;
1563 }
1564
1565 // Handles as RegisterDexFile may allocate dex caches (and cause thread suspension).
1566 StackHandleScope<4> hs(self);
1567 Handle<mirror::ClassLoader> h_parent(hs.NewHandle(class_loader->GetParent()));
1568 bool recursive_result = FindClassInPathClassLoader(soa, self, descriptor, hash, h_parent, result);
1569
1570 if (!recursive_result) {
1571 // Something wrong up the chain.
1572 return false;
1573 }
1574
1575 if (*result != nullptr) {
1576 // Found the class up the chain.
1577 return true;
1578 }
1579
1580 // Handle this step.
1581 // Handle as if this is the child PathClassLoader.
1582 // The class loader is a PathClassLoader which inherits from BaseDexClassLoader.
1583 // We need to get the DexPathList and loop through it.
1584 ArtField* const cookie_field = soa.DecodeField(WellKnownClasses::dalvik_system_DexFile_cookie);
1585 ArtField* const dex_file_field =
1586 soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
1587 mirror::Object* dex_path_list =
1588 soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)->
1589 GetObject(class_loader.Get());
1590 if (dex_path_list != nullptr && dex_file_field != nullptr && cookie_field != nullptr) {
1591 // DexPathList has an array dexElements of Elements[] which each contain a dex file.
1592 mirror::Object* dex_elements_obj =
1593 soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList_dexElements)->
1594 GetObject(dex_path_list);
1595 // Loop through each dalvik.system.DexPathList$Element's dalvik.system.DexFile and look
1596 // at the mCookie which is a DexFile vector.
1597 if (dex_elements_obj != nullptr) {
1598 Handle<mirror::ObjectArray<mirror::Object>> dex_elements =
1599 hs.NewHandle(dex_elements_obj->AsObjectArray<mirror::Object>());
1600 for (int32_t i = 0; i < dex_elements->GetLength(); ++i) {
1601 mirror::Object* element = dex_elements->GetWithoutChecks(i);
1602 if (element == nullptr) {
1603 // Should never happen, fall back to java code to throw a NPE.
1604 break;
1605 }
1606 mirror::Object* dex_file = dex_file_field->GetObject(element);
1607 if (dex_file != nullptr) {
1608 mirror::LongArray* long_array = cookie_field->GetObject(dex_file)->AsLongArray();
1609 if (long_array == nullptr) {
1610 // This should never happen so log a warning.
1611 LOG(WARNING) << "Null DexFile::mCookie for " << descriptor;
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001612 break;
1613 }
Andreas Gampef865ea92015-04-13 22:14:19 -07001614 int32_t long_array_size = long_array->GetLength();
1615 for (int32_t j = 0; j < long_array_size; ++j) {
1616 const DexFile* cp_dex_file = reinterpret_cast<const DexFile*>(static_cast<uintptr_t>(
1617 long_array->GetWithoutChecks(j)));
1618 const DexFile::ClassDef* dex_class_def = cp_dex_file->FindClassDef(descriptor, hash);
1619 if (dex_class_def != nullptr) {
1620 RegisterDexFile(*cp_dex_file);
1621 mirror::Class* klass = DefineClass(self, descriptor, hash, class_loader,
1622 *cp_dex_file, *dex_class_def);
1623 if (klass == nullptr) {
1624 CHECK(self->IsExceptionPending()) << descriptor;
1625 self->ClearException();
1626 // TODO: Is it really right to break here, and not check the other dex files?
1627 return true;
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001628 }
Andreas Gampef865ea92015-04-13 22:14:19 -07001629 *result = klass;
1630 return true;
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001631 }
1632 }
1633 }
1634 }
1635 }
Ian Rogers32427292014-11-19 14:05:21 -08001636 self->AssertNoPendingException();
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001637 }
Andreas Gampef865ea92015-04-13 22:14:19 -07001638
1639 // Result is still null from the parent call, no need to set it again...
1640 return true;
Mathieu Chartierab0ed822014-09-11 14:21:41 -07001641}
1642
Ian Rogers98379392014-02-24 16:53:16 -08001643mirror::Class* ClassLinker::FindClass(Thread* self, const char* descriptor,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07001644 Handle<mirror::ClassLoader> class_loader) {
Elliott Hughesba8eee12012-01-24 20:25:24 -08001645 DCHECK_NE(*descriptor, '\0') << "descriptor is empty string";
Ian Rogers98379392014-02-24 16:53:16 -08001646 DCHECK(self != nullptr);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001647 self->AssertNoPendingException();
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001648 if (descriptor[1] == '\0') {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001649 // only the descriptors of primitive types should be 1 character long, also avoid class lookup
1650 // for primitive classes that aren't backed by dex files.
1651 return FindPrimitiveClass(descriptor[0]);
1652 }
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001653 const size_t hash = ComputeModifiedUtf8Hash(descriptor);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001654 // Find the class in the loaded classes table.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001655 mirror::Class* klass = LookupClass(self, descriptor, hash, class_loader.Get());
Ian Rogers68b56852014-08-29 20:19:11 -07001656 if (klass != nullptr) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001657 return EnsureResolved(self, descriptor, klass);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001658 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001659 // Class is not yet loaded.
1660 if (descriptor[0] == '[') {
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001661 return CreateArrayClass(self, descriptor, hash, class_loader);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001662 } else if (class_loader.Get() == nullptr) {
Ian Rogers63557452014-06-04 16:57:15 -07001663 // The boot class loader, search the boot class path.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001664 ClassPathEntry pair = FindInClassPath(descriptor, hash, boot_class_path_);
Ian Rogers68b56852014-08-29 20:19:11 -07001665 if (pair.second != nullptr) {
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001666 return DefineClass(self, descriptor, hash, NullHandle<mirror::ClassLoader>(), *pair.first,
Ian Rogers7b078e82014-09-10 14:44:24 -07001667 *pair.second);
Ian Rogers63557452014-06-04 16:57:15 -07001668 } else {
1669 // The boot class loader is searched ahead of the application class loader, failures are
1670 // expected and will be wrapped in a ClassNotFoundException. Use the pre-allocated error to
1671 // trigger the chaining with a proper stack trace.
1672 mirror::Throwable* pre_allocated = Runtime::Current()->GetPreAllocatedNoClassDefFoundError();
Nicolas Geoffray14691c52015-03-05 10:40:17 +00001673 self->SetException(pre_allocated);
Ian Rogers63557452014-06-04 16:57:15 -07001674 return nullptr;
Jesse Wilson47daf872011-11-23 11:42:45 -05001675 }
Jesse Wilson47daf872011-11-23 11:42:45 -05001676 } else {
Ian Rogers98379392014-02-24 16:53:16 -08001677 ScopedObjectAccessUnchecked soa(self);
Andreas Gampef865ea92015-04-13 22:14:19 -07001678 mirror::Class* cp_klass;
1679 if (FindClassInPathClassLoader(soa, self, descriptor, hash, class_loader, &cp_klass)) {
1680 // The chain was understood. So the value in cp_klass is either the class we were looking
1681 // for, or not found.
1682 if (cp_klass != nullptr) {
1683 return cp_klass;
1684 }
1685 // TODO: We handle the boot classpath loader in FindClassInPathClassLoader. Try to unify this
1686 // and the branch above. TODO: throw the right exception here.
1687
1688 // We'll let the Java-side rediscover all this and throw the exception with the right stack
1689 // trace.
Mathieu Chartier6bcae8f2014-09-04 18:33:17 -07001690 }
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07001691
1692 if (Runtime::Current()->IsAotCompiler()) {
1693 // Oops, compile-time, can't run actual class-loader code.
1694 mirror::Throwable* pre_allocated = Runtime::Current()->GetPreAllocatedNoClassDefFoundError();
1695 self->SetException(pre_allocated);
1696 return nullptr;
1697 }
1698
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001699 ScopedLocalRef<jobject> class_loader_object(soa.Env(),
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001700 soa.AddLocalReference<jobject>(class_loader.Get()));
Elliott Hughes95572412011-12-13 18:14:20 -08001701 std::string class_name_string(DescriptorToDot(descriptor));
Ian Rogers68b56852014-08-29 20:19:11 -07001702 ScopedLocalRef<jobject> result(soa.Env(), nullptr);
Ian Rogers365c1022012-06-22 15:05:28 -07001703 {
1704 ScopedThreadStateChange tsc(self, kNative);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001705 ScopedLocalRef<jobject> class_name_object(soa.Env(),
1706 soa.Env()->NewStringUTF(class_name_string.c_str()));
Ian Rogers68b56852014-08-29 20:19:11 -07001707 if (class_name_object.get() == nullptr) {
Ian Rogers63557452014-06-04 16:57:15 -07001708 DCHECK(self->IsExceptionPending()); // OOME.
Ian Rogers68b56852014-08-29 20:19:11 -07001709 return nullptr;
Ian Rogers365c1022012-06-22 15:05:28 -07001710 }
Ian Rogers68b56852014-08-29 20:19:11 -07001711 CHECK(class_loader_object.get() != nullptr);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001712 result.reset(soa.Env()->CallObjectMethod(class_loader_object.get(),
1713 WellKnownClasses::java_lang_ClassLoader_loadClass,
1714 class_name_object.get()));
Jesse Wilson47daf872011-11-23 11:42:45 -05001715 }
Ian Rogers98379392014-02-24 16:53:16 -08001716 if (self->IsExceptionPending()) {
Elliott Hughes748382f2012-01-26 18:07:38 -08001717 // If the ClassLoader threw, pass that exception up.
Ian Rogers68b56852014-08-29 20:19:11 -07001718 return nullptr;
1719 } else if (result.get() == nullptr) {
Ian Rogerscab01012012-01-10 17:35:46 -08001720 // broken loader - throw NPE to be compatible with Dalvik
Nicolas Geoffray0aa50ce2015-03-10 11:03:29 +00001721 ThrowNullPointerException(StringPrintf("ClassLoader.loadClass returned null for %s",
1722 class_name_string.c_str()).c_str());
Ian Rogers68b56852014-08-29 20:19:11 -07001723 return nullptr;
Ian Rogers761bfa82012-01-11 10:14:05 -08001724 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001725 // success, return mirror::Class*
1726 return soa.Decode<mirror::Class*>(result.get());
Ian Rogers6b0870d2011-12-15 19:38:12 -08001727 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001728 }
Ian Rogers07140832014-09-30 15:43:59 -07001729 UNREACHABLE();
Brian Carlstromaded5f72011-10-07 17:15:04 -07001730}
1731
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001732mirror::Class* ClassLinker::DefineClass(Thread* self, const char* descriptor, size_t hash,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07001733 Handle<mirror::ClassLoader> class_loader,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001734 const DexFile& dex_file,
1735 const DexFile::ClassDef& dex_class_def) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001736 StackHandleScope<3> hs(self);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001737 auto klass = hs.NewHandle<mirror::Class>(nullptr);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001738
Brian Carlstromaded5f72011-10-07 17:15:04 -07001739 // Load the class from the dex file.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001740 if (UNLIKELY(!init_done_)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001741 // finish up init of hand crafted class_roots_
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001742 if (strcmp(descriptor, "Ljava/lang/Object;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001743 klass.Assign(GetClassRoot(kJavaLangObject));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001744 } else if (strcmp(descriptor, "Ljava/lang/Class;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001745 klass.Assign(GetClassRoot(kJavaLangClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001746 } else if (strcmp(descriptor, "Ljava/lang/String;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001747 klass.Assign(GetClassRoot(kJavaLangString));
Fred Shih4ee7a662014-07-11 09:59:27 -07001748 } else if (strcmp(descriptor, "Ljava/lang/ref/Reference;") == 0) {
1749 klass.Assign(GetClassRoot(kJavaLangRefReference));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001750 } else if (strcmp(descriptor, "Ljava/lang/DexCache;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001751 klass.Assign(GetClassRoot(kJavaLangDexCache));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001752 } else if (strcmp(descriptor, "Ljava/lang/reflect/ArtMethod;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001753 klass.Assign(GetClassRoot(kJavaLangReflectArtMethod));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001754 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001755 }
1756
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001757 if (klass.Get() == nullptr) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001758 // Allocate a class with the status of not ready.
1759 // Interface object should get the right size here. Regular class will
1760 // figure out the right size later and be replaced with one of the right
1761 // size when the class becomes resolved.
1762 klass.Assign(AllocClass(self, SizeOfClassWithoutEmbeddedTables(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001763 }
Ian Rogersc114b5f2014-07-21 08:55:01 -07001764 if (UNLIKELY(klass.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07001765 CHECK(self->IsExceptionPending()); // Expect an OOME.
Ian Rogersc114b5f2014-07-21 08:55:01 -07001766 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07001767 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001768 klass->SetDexCache(FindDexCache(dex_file));
Mathieu Chartierc7853442015-03-27 14:35:38 -07001769
1770 SetupClass(dex_file, dex_class_def, klass, class_loader.Get());
1771
Jeff Hao848f70a2014-01-15 13:49:50 -08001772 // Mark the string class by setting its access flag.
1773 if (UNLIKELY(!init_done_)) {
1774 if (strcmp(descriptor, "Ljava/lang/String;") == 0) {
1775 klass->SetStringClass();
1776 }
1777 }
1778
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07001779 ObjectLock<mirror::Class> lock(self, klass);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001780 klass->SetClinitThreadId(self->GetTid());
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001781
Mathieu Chartier590fee92013-09-13 13:46:47 -07001782 // Add the newly loaded class to the loaded classes table.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08001783 mirror::Class* existing = InsertClass(descriptor, klass.Get(), hash);
Ian Rogersc114b5f2014-07-21 08:55:01 -07001784 if (existing != nullptr) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001785 // We failed to insert because we raced with another thread. Calling EnsureResolved may cause
1786 // this thread to block.
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001787 return EnsureResolved(self, descriptor, existing);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001788 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001789
Mathieu Chartierc7853442015-03-27 14:35:38 -07001790 // Load the fields and other things after we are inserted in the table. This is so that we don't
1791 // end up allocating unfree-able linear alloc resources and then lose the race condition. The
1792 // other reason is that the field roots are only visited from the class table. So we need to be
1793 // inserted before we allocate / fill in these fields.
1794 LoadClass(self, dex_file, dex_class_def, klass);
1795 if (self->IsExceptionPending()) {
1796 // An exception occured during load, set status to erroneous while holding klass' lock in case
1797 // notification is necessary.
1798 if (!klass->IsErroneous()) {
1799 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
1800 }
1801 return nullptr;
1802 }
1803
Brian Carlstromaded5f72011-10-07 17:15:04 -07001804 // Finish loading (if necessary) by finding parents
1805 CHECK(!klass->IsLoaded());
1806 if (!LoadSuperAndInterfaces(klass, dex_file)) {
1807 // Loading failed.
Ian Rogersecd4d9a2014-07-22 00:59:52 -07001808 if (!klass->IsErroneous()) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07001809 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Ian Rogersecd4d9a2014-07-22 00:59:52 -07001810 }
Ian Rogersc114b5f2014-07-21 08:55:01 -07001811 return nullptr;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001812 }
1813 CHECK(klass->IsLoaded());
1814 // Link the class (if necessary)
1815 CHECK(!klass->IsResolved());
Mathieu Chartier590fee92013-09-13 13:46:47 -07001816 // TODO: Use fast jobjects?
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07001817 auto interfaces = hs.NewHandle<mirror::ObjectArray<mirror::Class>>(nullptr);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001818
1819 mirror::Class* new_class = nullptr;
1820 if (!LinkClass(self, descriptor, klass, interfaces, &new_class)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001821 // Linking failed.
Ian Rogersecd4d9a2014-07-22 00:59:52 -07001822 if (!klass->IsErroneous()) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07001823 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Ian Rogersecd4d9a2014-07-22 00:59:52 -07001824 }
Ian Rogersc114b5f2014-07-21 08:55:01 -07001825 return nullptr;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001826 }
Mathieu Chartier524507a2014-08-27 15:28:28 -07001827 self->AssertNoPendingException();
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001828 CHECK(new_class != nullptr) << descriptor;
1829 CHECK(new_class->IsResolved()) << descriptor;
1830
1831 Handle<mirror::Class> new_class_h(hs.NewHandle(new_class));
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001832
Sebastien Hertza8a697f2015-01-15 12:28:47 +01001833 // Instrumentation may have updated entrypoints for all methods of all
1834 // classes. However it could not update methods of this class while we
1835 // were loading it. Now the class is resolved, we can update entrypoints
1836 // as required by instrumentation.
1837 if (Runtime::Current()->GetInstrumentation()->AreExitStubsInstalled()) {
1838 // We must be in the kRunnable state to prevent instrumentation from
1839 // suspending all threads to update entrypoints while we are doing it
1840 // for this class.
1841 DCHECK_EQ(self->GetState(), kRunnable);
1842 Runtime::Current()->GetInstrumentation()->InstallStubsForClass(new_class_h.Get());
1843 }
1844
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001845 /*
1846 * We send CLASS_PREPARE events to the debugger from here. The
1847 * definition of "preparation" is creating the static fields for a
1848 * class and initializing them to the standard default values, but not
1849 * executing any code (that comes later, during "initialization").
1850 *
1851 * We did the static preparation in LinkClass.
1852 *
1853 * The class has been prepared and resolved but possibly not yet verified
1854 * at this point.
1855 */
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001856 Dbg::PostClassPrepare(new_class_h.Get());
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001857
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001858 return new_class_h.Get();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001859}
1860
Mingyao Yang98d1cc82014-05-15 17:02:16 -07001861uint32_t ClassLinker::SizeOfClassWithoutEmbeddedTables(const DexFile& dex_file,
1862 const DexFile::ClassDef& dex_class_def) {
Ian Rogers13735952014-10-08 12:43:28 -07001863 const uint8_t* class_data = dex_file.GetClassData(dex_class_def);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001864 size_t num_ref = 0;
Fred Shih37f05ef2014-07-16 18:38:08 -07001865 size_t num_8 = 0;
1866 size_t num_16 = 0;
Brian Carlstrom4873d462011-08-21 15:23:39 -07001867 size_t num_32 = 0;
1868 size_t num_64 = 0;
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001869 if (class_data != nullptr) {
Ian Rogers0571d352011-11-03 19:51:38 -07001870 for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) {
1871 const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001872 const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001873 char c = descriptor[0];
Fred Shih37f05ef2014-07-16 18:38:08 -07001874 switch (c) {
1875 case 'L':
1876 case '[':
1877 num_ref++;
1878 break;
1879 case 'J':
1880 case 'D':
1881 num_64++;
1882 break;
1883 case 'I':
1884 case 'F':
1885 num_32++;
1886 break;
1887 case 'S':
1888 case 'C':
1889 num_16++;
1890 break;
1891 case 'B':
1892 case 'Z':
1893 num_8++;
1894 break;
1895 default:
1896 LOG(FATAL) << "Unknown descriptor: " << c;
Ian Rogerse0a02da2014-12-02 14:10:53 -08001897 UNREACHABLE();
Brian Carlstrom4873d462011-08-21 15:23:39 -07001898 }
1899 }
1900 }
Fred Shih37f05ef2014-07-16 18:38:08 -07001901 return mirror::Class::ComputeClassSize(false, 0, num_8, num_16, num_32, num_64, num_ref);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001902}
1903
Ian Rogers97b52f82014-08-14 11:34:07 -07001904OatFile::OatClass ClassLinker::FindOatClass(const DexFile& dex_file, uint16_t class_def_idx,
1905 bool* found) {
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001906 DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16);
Richard Uhler07b3c232015-03-31 15:57:54 -07001907 const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
Vladimir Markoaa4497d2014-09-05 14:01:17 +01001908 if (oat_dex_file == nullptr) {
Ian Rogers97b52f82014-08-14 11:34:07 -07001909 *found = false;
1910 return OatFile::OatClass::Invalid();
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01001911 }
Ian Rogers97b52f82014-08-14 11:34:07 -07001912 *found = true;
1913 return oat_dex_file->GetOatClass(class_def_idx);
Ian Rogers19846512012-02-24 11:42:47 -08001914}
1915
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001916static uint32_t GetOatMethodIndexFromMethodIndex(const DexFile& dex_file, uint16_t class_def_idx,
1917 uint32_t method_idx) {
1918 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx);
Ian Rogers13735952014-10-08 12:43:28 -07001919 const uint8_t* class_data = dex_file.GetClassData(class_def);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07001920 CHECK(class_data != nullptr);
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001921 ClassDataItemIterator it(dex_file, class_data);
1922 // Skip fields
1923 while (it.HasNextStaticField()) {
1924 it.Next();
1925 }
1926 while (it.HasNextInstanceField()) {
1927 it.Next();
1928 }
1929 // Process methods
1930 size_t class_def_method_index = 0;
1931 while (it.HasNextDirectMethod()) {
1932 if (it.GetMemberIndex() == method_idx) {
1933 return class_def_method_index;
1934 }
1935 class_def_method_index++;
1936 it.Next();
1937 }
1938 while (it.HasNextVirtualMethod()) {
1939 if (it.GetMemberIndex() == method_idx) {
1940 return class_def_method_index;
1941 }
1942 class_def_method_index++;
1943 it.Next();
1944 }
1945 DCHECK(!it.HasNext());
1946 LOG(FATAL) << "Failed to find method index " << method_idx << " in " << dex_file.GetLocation();
Ian Rogerse0a02da2014-12-02 14:10:53 -08001947 UNREACHABLE();
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001948}
1949
Ian Rogers97b52f82014-08-14 11:34:07 -07001950const OatFile::OatMethod ClassLinker::FindOatMethodFor(mirror::ArtMethod* method, bool* found) {
Ian Rogers19846512012-02-24 11:42:47 -08001951 // Although we overwrite the trampoline of non-static methods, we may get here via the resolution
Ian Rogersfb6adba2012-03-04 21:51:51 -08001952 // method for direct methods (or virtual methods made direct).
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001953 mirror::Class* declaring_class = method->GetDeclaringClass();
Ian Rogersfb6adba2012-03-04 21:51:51 -08001954 size_t oat_method_index;
1955 if (method->IsStatic() || method->IsDirect()) {
1956 // Simple case where the oat method index was stashed at load time.
1957 oat_method_index = method->GetMethodIndex();
1958 } else {
1959 // We're invoking a virtual method directly (thanks to sharpening), compute the oat_method_index
1960 // by search for its position in the declared virtual methods.
1961 oat_method_index = declaring_class->NumDirectMethods();
1962 size_t end = declaring_class->NumVirtualMethods();
Andreas Gampe277ccbd2014-11-03 21:36:10 -08001963 bool found_virtual = false;
Ian Rogersfb6adba2012-03-04 21:51:51 -08001964 for (size_t i = 0; i < end; i++) {
Jeff Hao68caf9e2014-09-03 13:48:16 -07001965 // Check method index instead of identity in case of duplicate method definitions.
1966 if (method->GetDexMethodIndex() ==
1967 declaring_class->GetVirtualMethod(i)->GetDexMethodIndex()) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08001968 found_virtual = true;
Ian Rogersfb6adba2012-03-04 21:51:51 -08001969 break;
1970 }
Ian Rogersf320b632012-03-13 18:47:47 -07001971 oat_method_index++;
Ian Rogersfb6adba2012-03-04 21:51:51 -08001972 }
Andreas Gampe277ccbd2014-11-03 21:36:10 -08001973 CHECK(found_virtual) << "Didn't find oat method index for virtual method: "
1974 << PrettyMethod(method);
Ian Rogersfb6adba2012-03-04 21:51:51 -08001975 }
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001976 DCHECK_EQ(oat_method_index,
1977 GetOatMethodIndexFromMethodIndex(*declaring_class->GetDexCache()->GetDexFile(),
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001978 method->GetDeclaringClass()->GetDexClassDefIndex(),
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001979 method->GetDexMethodIndex()));
Ian Rogers97b52f82014-08-14 11:34:07 -07001980 OatFile::OatClass oat_class = FindOatClass(*declaring_class->GetDexCache()->GetDexFile(),
1981 declaring_class->GetDexClassDefIndex(),
1982 found);
Andreas Gampe277ccbd2014-11-03 21:36:10 -08001983 if (!(*found)) {
Ian Rogers97b52f82014-08-14 11:34:07 -07001984 return OatFile::OatMethod::Invalid();
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01001985 }
Ian Rogers97b52f82014-08-14 11:34:07 -07001986 return oat_class.GetOatMethod(oat_method_index);
TDYa12785321912012-04-01 15:24:56 -07001987}
1988
1989// Special case to get oat code without overwriting a trampoline.
Ian Rogersef7d42f2014-01-06 12:55:46 -08001990const void* ClassLinker::GetQuickOatCodeFor(mirror::ArtMethod* method) {
Ian Rogers62d6c772013-02-27 08:32:07 -08001991 CHECK(!method->IsAbstract()) << PrettyMethod(method);
Jeff Hao8df6cea2013-07-29 13:54:48 -07001992 if (method->IsProxyMethod()) {
Ian Rogersef7d42f2014-01-06 12:55:46 -08001993 return GetQuickProxyInvokeHandler();
Jeff Hao8df6cea2013-07-29 13:54:48 -07001994 }
Ian Rogers97b52f82014-08-14 11:34:07 -07001995 bool found;
Mathieu Chartierc0d5f892015-02-25 13:22:57 -08001996 OatFile::OatMethod oat_method = FindOatMethodFor(method, &found);
1997 if (found) {
1998 auto* code = oat_method.GetQuickCode();
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08001999 if (code != nullptr) {
2000 return code;
Mathieu Chartier2535abe2015-02-17 10:38:49 -08002001 }
2002 }
Mathieu Chartierc0d5f892015-02-25 13:22:57 -08002003 jit::Jit* const jit = Runtime::Current()->GetJit();
2004 if (jit != nullptr) {
2005 auto* code = jit->GetCodeCache()->GetCodeFor(method);
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002006 if (code != nullptr) {
2007 return code;
2008 }
2009 }
2010 if (method->IsNative()) {
2011 // No code and native? Use generic trampoline.
2012 return GetQuickGenericJniStub();
2013 }
2014 return GetQuickToInterpreterBridge();
TDYa12785321912012-04-01 15:24:56 -07002015}
2016
Hiroshi Yamauchi9bdec882014-08-15 17:11:12 -07002017const void* ClassLinker::GetOatMethodQuickCodeFor(mirror::ArtMethod* method) {
2018 if (method->IsNative() || method->IsAbstract() || method->IsProxyMethod()) {
2019 return nullptr;
2020 }
Mathieu Chartierc0d5f892015-02-25 13:22:57 -08002021 bool found;
2022 OatFile::OatMethod oat_method = FindOatMethodFor(method, &found);
2023 if (found) {
2024 return oat_method.GetQuickCode();
2025 }
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002026 jit::Jit* jit = Runtime::Current()->GetJit();
2027 if (jit != nullptr) {
2028 auto* code = jit->GetCodeCache()->GetCodeFor(method);
2029 if (code != nullptr) {
2030 return code;
2031 }
2032 }
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002033 return nullptr;
Hiroshi Yamauchi9bdec882014-08-15 17:11:12 -07002034}
2035
Ian Rogersef7d42f2014-01-06 12:55:46 -08002036const void* ClassLinker::GetQuickOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx,
2037 uint32_t method_idx) {
Ian Rogers97b52f82014-08-14 11:34:07 -07002038 bool found;
2039 OatFile::OatClass oat_class = FindOatClass(dex_file, class_def_idx, &found);
2040 if (!found) {
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002041 return nullptr;
2042 }
Ian Rogers8b2c0b92013-09-19 02:56:49 -07002043 uint32_t oat_method_idx = GetOatMethodIndexFromMethodIndex(dex_file, class_def_idx, method_idx);
Vladimir Markod3c5beb2014-04-11 16:32:51 +01002044 return oat_class.GetOatMethod(oat_method_idx).GetQuickCode();
Ian Rogersef7d42f2014-01-06 12:55:46 -08002045}
2046
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002047// Returns true if the method must run with interpreter, false otherwise.
Elliott Hughes956af0f2014-12-11 14:34:28 -08002048static bool NeedsInterpreter(mirror::ArtMethod* method, const void* quick_code)
Brian Carlstromf3632832014-05-20 15:36:53 -07002049 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Elliott Hughes956af0f2014-12-11 14:34:28 -08002050 if (quick_code == nullptr) {
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002051 // No code: need interpreter.
Andreas Gampe2da88232014-02-27 12:26:20 -08002052 // May return true for native code, in the case of generic JNI
2053 // DCHECK(!method->IsNative());
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002054 return true;
2055 }
2056 // If interpreter mode is enabled, every method (except native and proxy) must
2057 // be run with interpreter.
2058 return Runtime::Current()->GetInstrumentation()->InterpretOnly() &&
2059 !method->IsNative() && !method->IsProxyMethod();
2060}
2061
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002062void ClassLinker::FixupStaticTrampolines(mirror::Class* klass) {
Brian Carlstrom073278c2014-02-19 15:21:21 -08002063 DCHECK(klass->IsInitialized()) << PrettyDescriptor(klass);
Ian Rogers1c829822013-09-30 18:18:50 -07002064 if (klass->NumDirectMethods() == 0) {
2065 return; // No direct methods => no static methods.
Ian Rogers19846512012-02-24 11:42:47 -08002066 }
Ian Rogers62d6c772013-02-27 08:32:07 -08002067 Runtime* runtime = Runtime::Current();
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07002068 if (!runtime->IsStarted()) {
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002069 if (runtime->IsAotCompiler() || runtime->GetHeap()->HasImageSpace()) {
Alex Light64ad14d2014-08-19 14:23:13 -07002070 return; // OAT file unavailable.
2071 }
Ian Rogers19846512012-02-24 11:42:47 -08002072 }
Alex Light64ad14d2014-08-19 14:23:13 -07002073
Mathieu Chartierf8322842014-05-16 10:59:25 -07002074 const DexFile& dex_file = klass->GetDexFile();
2075 const DexFile::ClassDef* dex_class_def = klass->GetClassDef();
Ian Rogers1c829822013-09-30 18:18:50 -07002076 CHECK(dex_class_def != nullptr);
Ian Rogers13735952014-10-08 12:43:28 -07002077 const uint8_t* class_data = dex_file.GetClassData(*dex_class_def);
Ian Rogers1c829822013-09-30 18:18:50 -07002078 // There should always be class data if there were direct methods.
2079 CHECK(class_data != nullptr) << PrettyDescriptor(klass);
Ian Rogers19846512012-02-24 11:42:47 -08002080 ClassDataItemIterator it(dex_file, class_data);
2081 // Skip fields
2082 while (it.HasNextStaticField()) {
2083 it.Next();
2084 }
2085 while (it.HasNextInstanceField()) {
2086 it.Next();
2087 }
Ian Rogers97b52f82014-08-14 11:34:07 -07002088 bool has_oat_class;
2089 OatFile::OatClass oat_class = FindOatClass(dex_file, klass->GetDexClassDefIndex(),
2090 &has_oat_class);
Ian Rogers1c829822013-09-30 18:18:50 -07002091 // Link the code of methods skipped by LinkCode.
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002092 for (size_t method_index = 0; it.HasNextDirectMethod(); ++method_index, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07002093 mirror::ArtMethod* method = klass->GetDirectMethod(method_index);
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002094 if (!method->IsStatic()) {
2095 // Only update static methods.
2096 continue;
Ian Rogers19846512012-02-24 11:42:47 -08002097 }
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002098 const void* quick_code = nullptr;
2099 if (has_oat_class) {
2100 OatFile::OatMethod oat_method = oat_class.GetOatMethod(method_index);
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002101 quick_code = oat_method.GetQuickCode();
2102 }
Elliott Hughes956af0f2014-12-11 14:34:28 -08002103 const bool enter_interpreter = NeedsInterpreter(method, quick_code);
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002104 if (enter_interpreter) {
2105 // Use interpreter entry point.
Ian Rogers1a570662014-03-12 01:02:21 -07002106 // Check whether the method is native, in which case it's generic JNI.
Elliott Hughes956af0f2014-12-11 14:34:28 -08002107 if (quick_code == nullptr && method->IsNative()) {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002108 quick_code = GetQuickGenericJniStub();
Andreas Gampe2da88232014-02-27 12:26:20 -08002109 } else {
2110 quick_code = GetQuickToInterpreterBridge();
2111 }
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002112 }
Elliott Hughes956af0f2014-12-11 14:34:28 -08002113 runtime->GetInstrumentation()->UpdateMethodsCode(method, quick_code);
Ian Rogers19846512012-02-24 11:42:47 -08002114 }
Ian Rogers62d6c772013-02-27 08:32:07 -08002115 // Ignore virtual methods on the iterator.
Ian Rogers19846512012-02-24 11:42:47 -08002116}
2117
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002118void ClassLinker::LinkCode(Handle<mirror::ArtMethod> method,
Mathieu Chartierbf99f772014-08-23 16:37:27 -07002119 const OatFile::OatClass* oat_class,
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002120 uint32_t class_def_method_index) {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002121 Runtime* runtime = Runtime::Current();
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002122 if (runtime->IsAotCompiler()) {
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002123 // The following code only applies to a non-compiler runtime.
2124 return;
2125 }
Ian Rogers62d6c772013-02-27 08:32:07 -08002126 // Method shouldn't have already been linked.
Ian Rogersef7d42f2014-01-06 12:55:46 -08002127 DCHECK(method->GetEntryPointFromQuickCompiledCode() == nullptr);
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002128 if (oat_class != nullptr) {
2129 // Every kind of method should at least get an invoke stub from the oat_method.
2130 // non-abstract methods also get their code pointers.
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002131 const OatFile::OatMethod oat_method = oat_class->GetOatMethod(class_def_method_index);
Nicolas Geoffray4fcdc942014-07-22 10:48:00 +01002132 oat_method.LinkMethod(method.Get());
2133 }
Brian Carlstrom92827a52011-10-10 15:50:01 -07002134
Jeff Hao16743632013-05-08 10:59:04 -07002135 // Install entry point from interpreter.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002136 bool enter_interpreter = NeedsInterpreter(method.Get(),
Elliott Hughes956af0f2014-12-11 14:34:28 -08002137 method->GetEntryPointFromQuickCompiledCode());
Andreas Gampebf6b92a2014-03-05 16:11:04 -08002138 if (enter_interpreter && !method->IsNative()) {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002139 method->SetEntryPointFromInterpreter(artInterpreterToInterpreterBridge);
Jeff Hao16743632013-05-08 10:59:04 -07002140 } else {
Dragos Sbirlea08bf1962013-08-12 08:53:04 -07002141 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Jeff Hao16743632013-05-08 10:59:04 -07002142 }
2143
Brian Carlstrom92827a52011-10-10 15:50:01 -07002144 if (method->IsAbstract()) {
Ian Rogersef7d42f2014-01-06 12:55:46 -08002145 method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge());
Brian Carlstrom92827a52011-10-10 15:50:01 -07002146 return;
2147 }
Ian Rogers19846512012-02-24 11:42:47 -08002148
2149 if (method->IsStatic() && !method->IsConstructor()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08002150 // For static methods excluding the class initializer, install the trampoline.
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002151 // It will be replaced by the proper entry point by ClassLinker::FixupStaticTrampolines
2152 // after initializing class (see ClassLinker::InitializeClass method).
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002153 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub());
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02002154 } else if (enter_interpreter) {
Andreas Gampebf6b92a2014-03-05 16:11:04 -08002155 if (!method->IsNative()) {
2156 // Set entry point from compiled code if there's no code or in interpreter only mode.
2157 method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge());
Andreas Gampebf6b92a2014-03-05 16:11:04 -08002158 } else {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002159 method->SetEntryPointFromQuickCompiledCode(GetQuickGenericJniStub());
Andreas Gampebf6b92a2014-03-05 16:11:04 -08002160 }
Ian Rogers0d6de042012-02-29 08:50:26 -08002161 }
jeffhao26c0a1a2012-01-17 16:28:33 -08002162
Ian Rogers62d6c772013-02-27 08:32:07 -08002163 if (method->IsNative()) {
2164 // Unregistering restores the dlsym lookup stub.
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002165 method->UnregisterNative();
Andreas Gampe90546832014-03-12 18:07:19 -07002166
2167 if (enter_interpreter) {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002168 // We have a native method here without code. Then it should have either the generic JNI
2169 // trampoline as entrypoint (non-static), or the resolution trampoline (static).
2170 // TODO: this doesn't handle all the cases where trampolines may be installed.
2171 const void* entry_point = method->GetEntryPointFromQuickCompiledCode();
2172 DCHECK(IsQuickGenericJniStub(entry_point) || IsQuickResolutionStub(entry_point));
Andreas Gampe90546832014-03-12 18:07:19 -07002173 }
Brian Carlstrom92827a52011-10-10 15:50:01 -07002174 }
2175}
2176
Mathieu Chartierc7853442015-03-27 14:35:38 -07002177void ClassLinker::SetupClass(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
2178 Handle<mirror::Class> klass, mirror::ClassLoader* class_loader) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002179 CHECK(klass.Get() != nullptr);
2180 CHECK(klass->GetDexCache() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002181 CHECK_EQ(mirror::Class::kStatusNotReady, klass->GetStatus());
Brian Carlstromf615a612011-07-23 12:50:34 -07002182 const char* descriptor = dex_file.GetClassDescriptor(dex_class_def);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002183 CHECK(descriptor != nullptr);
Brian Carlstrom934486c2011-07-12 23:42:50 -07002184
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002185 klass->SetClass(GetClassRoot(kJavaLangClass));
Andreas Gampe51829322014-08-25 15:05:04 -07002186 uint32_t access_flags = dex_class_def.GetJavaAccessFlags();
Brian Carlstrom8e3fb142013-10-09 21:00:27 -07002187 CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002188 klass->SetAccessFlags(access_flags);
2189 klass->SetClassLoader(class_loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08002190 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002191 mirror::Class::SetStatus(klass, mirror::Class::kStatusIdx, nullptr);
Brian Carlstrom934486c2011-07-12 23:42:50 -07002192
Ian Rogers8b2c0b92013-09-19 02:56:49 -07002193 klass->SetDexClassDefIndex(dex_file.GetIndexForClassDef(dex_class_def));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002194 klass->SetDexTypeIndex(dex_class_def.class_idx_);
Mathieu Chartier91a6dc42014-12-01 10:31:15 -08002195 CHECK(klass->GetDexCacheStrings() != nullptr);
Mathieu Chartierc7853442015-03-27 14:35:38 -07002196}
Brian Carlstrom934486c2011-07-12 23:42:50 -07002197
Mathieu Chartierc7853442015-03-27 14:35:38 -07002198void ClassLinker::LoadClass(Thread* self, const DexFile& dex_file,
2199 const DexFile::ClassDef& dex_class_def,
2200 Handle<mirror::Class> klass) {
Ian Rogers13735952014-10-08 12:43:28 -07002201 const uint8_t* class_data = dex_file.GetClassData(dex_class_def);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002202 if (class_data == nullptr) {
Ian Rogers0571d352011-11-03 19:51:38 -07002203 return; // no fields or methods - for example a marker interface
Brian Carlstrom934486c2011-07-12 23:42:50 -07002204 }
Ian Rogers97b52f82014-08-14 11:34:07 -07002205 bool has_oat_class = false;
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07002206 if (Runtime::Current()->IsStarted() && !Runtime::Current()->IsAotCompiler()) {
Ian Rogers97b52f82014-08-14 11:34:07 -07002207 OatFile::OatClass oat_class = FindOatClass(dex_file, klass->GetDexClassDefIndex(),
2208 &has_oat_class);
2209 if (has_oat_class) {
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002210 LoadClassMembers(self, dex_file, class_data, klass, &oat_class);
Ian Rogers97b52f82014-08-14 11:34:07 -07002211 }
2212 }
2213 if (!has_oat_class) {
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002214 LoadClassMembers(self, dex_file, class_data, klass, nullptr);
Vladimir Markod3c5beb2014-04-11 16:32:51 +01002215 }
2216}
2217
Mathieu Chartierc7853442015-03-27 14:35:38 -07002218ArtField* ClassLinker::AllocArtFieldArray(Thread* self, size_t length) {
2219 auto* const la = Runtime::Current()->GetLinearAlloc();
2220 auto* ptr = reinterpret_cast<ArtField*>(la->AllocArray<ArtField>(self, length));
2221 CHECK(ptr!= nullptr);
2222 std::uninitialized_fill_n(ptr, length, ArtField());
2223 return ptr;
2224}
2225
Ian Rogers7b078e82014-09-10 14:44:24 -07002226void ClassLinker::LoadClassMembers(Thread* self, const DexFile& dex_file,
Ian Rogers13735952014-10-08 12:43:28 -07002227 const uint8_t* class_data,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002228 Handle<mirror::Class> klass,
Vladimir Markod3c5beb2014-04-11 16:32:51 +01002229 const OatFile::OatClass* oat_class) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07002230 // Load static fields.
Ian Rogers0571d352011-11-03 19:51:38 -07002231 ClassDataItemIterator it(dex_file, class_data);
Mathieu Chartierc7853442015-03-27 14:35:38 -07002232 const size_t num_sfields = it.NumStaticFields();
2233 ArtField* sfields = num_sfields != 0 ? AllocArtFieldArray(self, num_sfields) : nullptr;
Ian Rogers0571d352011-11-03 19:51:38 -07002234 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07002235 CHECK_LT(i, num_sfields);
Mathieu Chartierc7853442015-03-27 14:35:38 -07002236 LoadField(it, klass, &sfields[i]);
Ian Rogers0571d352011-11-03 19:51:38 -07002237 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07002238 klass->SetSFields(sfields);
2239 klass->SetNumStaticFields(num_sfields);
2240 DCHECK_EQ(klass->NumStaticFields(), num_sfields);
2241 // Load instance fields.
2242 const size_t num_ifields = it.NumInstanceFields();
2243 ArtField* ifields = num_ifields != 0 ? AllocArtFieldArray(self, num_ifields) : nullptr;
Ian Rogers0571d352011-11-03 19:51:38 -07002244 for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07002245 CHECK_LT(i, num_ifields);
Mathieu Chartierc7853442015-03-27 14:35:38 -07002246 LoadField(it, klass, &ifields[i]);
Brian Carlstrom934486c2011-07-12 23:42:50 -07002247 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07002248 klass->SetIFields(ifields);
2249 klass->SetNumInstanceFields(num_ifields);
2250 DCHECK_EQ(klass->NumInstanceFields(), num_ifields);
Mathieu Chartierf3f2a7a2015-04-14 15:43:10 -07002251 // Note: We cannot have thread suspension until the field arrays are setup or else
2252 // Class::VisitFieldRoots may miss some fields.
2253 self->AllowThreadSuspension();
Ian Rogers0571d352011-11-03 19:51:38 -07002254 // Load methods.
2255 if (it.NumDirectMethods() != 0) {
Brian Carlstrom934486c2011-07-12 23:42:50 -07002256 // TODO: append direct methods to class object
Ian Rogersa436fde2013-08-27 23:34:06 -07002257 mirror::ObjectArray<mirror::ArtMethod>* directs =
2258 AllocArtMethodArray(self, it.NumDirectMethods());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002259 if (UNLIKELY(directs == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002260 CHECK(self->IsExceptionPending()); // OOME.
2261 return;
2262 }
2263 klass->SetDirectMethods(directs);
Brian Carlstrom934486c2011-07-12 23:42:50 -07002264 }
Ian Rogers0571d352011-11-03 19:51:38 -07002265 if (it.NumVirtualMethods() != 0) {
2266 // TODO: append direct methods to class object
Ian Rogersa436fde2013-08-27 23:34:06 -07002267 mirror::ObjectArray<mirror::ArtMethod>* virtuals =
2268 AllocArtMethodArray(self, it.NumVirtualMethods());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002269 if (UNLIKELY(virtuals == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002270 CHECK(self->IsExceptionPending()); // OOME.
2271 return;
2272 }
2273 klass->SetVirtualMethods(virtuals);
Brian Carlstrom934486c2011-07-12 23:42:50 -07002274 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08002275 size_t class_def_method_index = 0;
Jeff Hao68caf9e2014-09-03 13:48:16 -07002276 uint32_t last_dex_method_index = DexFile::kDexNoIndex;
2277 size_t last_class_def_method_index = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07002278 for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) {
Ian Rogers7b078e82014-09-10 14:44:24 -07002279 self->AllowThreadSuspension();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002280 StackHandleScope<1> hs(self);
2281 Handle<mirror::ArtMethod> method(hs.NewHandle(LoadMethod(self, dex_file, it, klass)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002282 if (UNLIKELY(method.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002283 CHECK(self->IsExceptionPending()); // OOME.
2284 return;
2285 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002286 klass->SetDirectMethod(i, method.Get());
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002287 LinkCode(method, oat_class, class_def_method_index);
Jeff Hao68caf9e2014-09-03 13:48:16 -07002288 uint32_t it_method_index = it.GetMemberIndex();
2289 if (last_dex_method_index == it_method_index) {
2290 // duplicate case
2291 method->SetMethodIndex(last_class_def_method_index);
2292 } else {
2293 method->SetMethodIndex(class_def_method_index);
2294 last_dex_method_index = it_method_index;
2295 last_class_def_method_index = class_def_method_index;
2296 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08002297 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07002298 }
2299 for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) {
Ian Rogers7b078e82014-09-10 14:44:24 -07002300 self->AllowThreadSuspension();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002301 StackHandleScope<1> hs(self);
2302 Handle<mirror::ArtMethod> method(hs.NewHandle(LoadMethod(self, dex_file, it, klass)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002303 if (UNLIKELY(method.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002304 CHECK(self->IsExceptionPending()); // OOME.
2305 return;
2306 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002307 klass->SetVirtualMethod(i, method.Get());
Ian Rogersfb6adba2012-03-04 21:51:51 -08002308 DCHECK_EQ(class_def_method_index, it.NumDirectMethods() + i);
Ian Rogers6a3c1fc2014-10-31 00:33:20 -07002309 LinkCode(method, oat_class, class_def_method_index);
Ian Rogersfb6adba2012-03-04 21:51:51 -08002310 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07002311 }
2312 DCHECK(!it.HasNext());
Brian Carlstrom934486c2011-07-12 23:42:50 -07002313}
2314
Mathieu Chartierc7853442015-03-27 14:35:38 -07002315void ClassLinker::LoadField(const ClassDataItemIterator& it, Handle<mirror::Class> klass,
2316 ArtField* dst) {
2317 const uint32_t field_idx = it.GetMemberIndex();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002318 dst->SetDexFieldIndex(field_idx);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002319 dst->SetDeclaringClass(klass.Get());
Andreas Gampe51829322014-08-25 15:05:04 -07002320 dst->SetAccessFlags(it.GetFieldAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07002321}
2322
Brian Carlstromea46f952013-07-30 01:26:50 -07002323mirror::ArtMethod* ClassLinker::LoadMethod(Thread* self, const DexFile& dex_file,
Ian Rogersa436fde2013-08-27 23:34:06 -07002324 const ClassDataItemIterator& it,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002325 Handle<mirror::Class> klass) {
Ian Rogers19846512012-02-24 11:42:47 -08002326 uint32_t dex_method_idx = it.GetMemberIndex();
Ian Rogers19846512012-02-24 11:42:47 -08002327 const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002328 const char* method_name = dex_file.StringDataByIdx(method_id.name_idx_);
Mathieu Chartier66f19252012-09-18 08:57:04 -07002329
Brian Carlstromea46f952013-07-30 01:26:50 -07002330 mirror::ArtMethod* dst = AllocArtMethod(self);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002331 if (UNLIKELY(dst == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002332 CHECK(self->IsExceptionPending()); // OOME.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002333 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07002334 }
Brian Carlstromea46f952013-07-30 01:26:50 -07002335 DCHECK(dst->IsArtMethod()) << PrettyDescriptor(dst->GetClass());
Mathieu Chartier66f19252012-09-18 08:57:04 -07002336
Mathieu Chartier2d5f39e2014-09-19 17:52:37 -07002337 ScopedAssertNoThreadSuspension ants(self, "LoadMethod");
Mathieu Chartier66f19252012-09-18 08:57:04 -07002338 dst->SetDexMethodIndex(dex_method_idx);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002339 dst->SetDeclaringClass(klass.Get());
Ian Rogers0571d352011-11-03 19:51:38 -07002340 dst->SetCodeItemOffset(it.GetMethodCodeItemOffset());
Brian Carlstrom934486c2011-07-12 23:42:50 -07002341
Ian Rogers19846512012-02-24 11:42:47 -08002342 dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002343 dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes());
Mathieu Chartier66f19252012-09-18 08:57:04 -07002344
Andreas Gampe51829322014-08-25 15:05:04 -07002345 uint32_t access_flags = it.GetMethodAccessFlags();
Ian Rogers241b5de2013-10-09 17:58:57 -07002346
Ian Rogersdfb325e2013-10-30 01:00:44 -07002347 if (UNLIKELY(strcmp("finalize", method_name) == 0)) {
Ian Rogers241b5de2013-10-09 17:58:57 -07002348 // Set finalizable flag on declaring class.
Ian Rogersdfb325e2013-10-30 01:00:44 -07002349 if (strcmp("V", dex_file.GetShorty(method_id.proto_idx_)) == 0) {
2350 // Void return type.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002351 if (klass->GetClassLoader() != nullptr) { // All non-boot finalizer methods are flagged.
Ian Rogersdfb325e2013-10-30 01:00:44 -07002352 klass->SetFinalizable();
2353 } else {
Ian Rogers1ff3c982014-08-12 02:30:58 -07002354 std::string temp;
2355 const char* klass_descriptor = klass->GetDescriptor(&temp);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002356 // The Enum class declares a "final" finalize() method to prevent subclasses from
2357 // introducing a finalizer. We don't want to set the finalizable flag for Enum or its
2358 // subclasses, so we exclude it here.
2359 // We also want to avoid setting the flag on Object, where we know that finalize() is
2360 // empty.
Ian Rogers1ff3c982014-08-12 02:30:58 -07002361 if (strcmp(klass_descriptor, "Ljava/lang/Object;") != 0 &&
2362 strcmp(klass_descriptor, "Ljava/lang/Enum;") != 0) {
Ian Rogers241b5de2013-10-09 17:58:57 -07002363 klass->SetFinalizable();
Ian Rogers241b5de2013-10-09 17:58:57 -07002364 }
2365 }
2366 }
2367 } else if (method_name[0] == '<') {
2368 // Fix broken access flags for initializers. Bug 11157540.
Ian Rogersdfb325e2013-10-30 01:00:44 -07002369 bool is_init = (strcmp("<init>", method_name) == 0);
2370 bool is_clinit = !is_init && (strcmp("<clinit>", method_name) == 0);
Ian Rogers241b5de2013-10-09 17:58:57 -07002371 if (UNLIKELY(!is_init && !is_clinit)) {
2372 LOG(WARNING) << "Unexpected '<' at start of method name " << method_name;
2373 } else {
2374 if (UNLIKELY((access_flags & kAccConstructor) == 0)) {
2375 LOG(WARNING) << method_name << " didn't have expected constructor access flag in class "
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002376 << PrettyDescriptor(klass.Get()) << " in dex file " << dex_file.GetLocation();
Ian Rogers241b5de2013-10-09 17:58:57 -07002377 access_flags |= kAccConstructor;
2378 }
2379 }
2380 }
2381 dst->SetAccessFlags(access_flags);
Mathieu Chartier66f19252012-09-18 08:57:04 -07002382
Mathieu Chartier66f19252012-09-18 08:57:04 -07002383 return dst;
Brian Carlstrom934486c2011-07-12 23:42:50 -07002384}
2385
Ian Rogers7b078e82014-09-10 14:44:24 -07002386void ClassLinker::AppendToBootClassPath(Thread* self, const DexFile& dex_file) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002387 StackHandleScope<1> hs(self);
2388 Handle<mirror::DexCache> dex_cache(hs.NewHandle(AllocDexCache(self, dex_file)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002389 CHECK(dex_cache.Get() != nullptr) << "Failed to allocate dex cache for "
2390 << dex_file.GetLocation();
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002391 AppendToBootClassPath(dex_file, dex_cache);
Brian Carlstroma663ea52011-08-19 23:33:41 -07002392}
2393
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002394void ClassLinker::AppendToBootClassPath(const DexFile& dex_file,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002395 Handle<mirror::DexCache> dex_cache) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002396 CHECK(dex_cache.Get() != nullptr) << dex_file.GetLocation();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07002397 boot_class_path_.push_back(&dex_file);
Brian Carlstroma663ea52011-08-19 23:33:41 -07002398 RegisterDexFile(dex_file, dex_cache);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002399}
2400
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002401bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002402 dex_lock_.AssertSharedHeld(Thread::Current());
Mathieu Chartier66f19252012-09-18 08:57:04 -07002403 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002404 mirror::DexCache* dex_cache = GetDexCache(i);
2405 if (dex_cache->GetDexFile() == &dex_file) {
Ian Rogers19846512012-02-24 11:42:47 -08002406 return true;
Brian Carlstromaded5f72011-10-07 17:15:04 -07002407 }
2408 }
2409 return false;
Brian Carlstroma663ea52011-08-19 23:33:41 -07002410}
2411
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002412bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002413 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstrom06918512011-10-16 23:39:12 -07002414 return IsDexFileRegisteredLocked(dex_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -07002415}
2416
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002417void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002418 Handle<mirror::DexCache> dex_cache) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002419 dex_lock_.AssertExclusiveHeld(Thread::Current());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002420 CHECK(dex_cache.Get() != nullptr) << dex_file.GetLocation();
Brian Carlstrom7c3d13a2013-09-04 17:15:11 -07002421 CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation()))
2422 << dex_cache->GetLocation()->ToModifiedUtf8() << " " << dex_file.GetLocation();
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07002423 dex_caches_.push_back(GcRoot<mirror::DexCache>(dex_cache.Get()));
Mathieu Chartier66f19252012-09-18 08:57:04 -07002424 dex_cache->SetDexFile(&dex_file);
Mathieu Chartier893263b2014-03-04 11:07:42 -08002425 if (log_new_dex_caches_roots_) {
2426 // TODO: This is not safe if we can remove dex caches.
2427 new_dex_cache_roots_.push_back(dex_caches_.size() - 1);
2428 }
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002429}
2430
Brian Carlstromaded5f72011-10-07 17:15:04 -07002431void ClassLinker::RegisterDexFile(const DexFile& dex_file) {
Ian Rogers1f539342012-10-03 21:09:42 -07002432 Thread* self = Thread::Current();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002433 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002434 ReaderMutexLock mu(self, dex_lock_);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002435 if (IsDexFileRegisteredLocked(dex_file)) {
2436 return;
2437 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07002438 }
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002439 // Don't alloc while holding the lock, since allocation may need to
2440 // suspend all threads and another thread may need the dex_lock_ to
2441 // get to a suspend point.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002442 StackHandleScope<1> hs(self);
2443 Handle<mirror::DexCache> dex_cache(hs.NewHandle(AllocDexCache(self, dex_file)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002444 CHECK(dex_cache.Get() != nullptr) << "Failed to allocate dex cache for "
2445 << dex_file.GetLocation();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002446 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002447 WriterMutexLock mu(self, dex_lock_);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002448 if (IsDexFileRegisteredLocked(dex_file)) {
2449 return;
2450 }
2451 RegisterDexFileLocked(dex_file, dex_cache);
2452 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07002453}
2454
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002455void ClassLinker::RegisterDexFile(const DexFile& dex_file,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002456 Handle<mirror::DexCache> dex_cache) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002457 WriterMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -07002458 RegisterDexFileLocked(dex_file, dex_cache);
2459}
2460
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002461mirror::DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002462 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002463 // Search assuming unique-ness of dex file.
Mathieu Chartier66f19252012-09-18 08:57:04 -07002464 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002465 mirror::DexCache* dex_cache = GetDexCache(i);
Mathieu Chartier66f19252012-09-18 08:57:04 -07002466 if (dex_cache->GetDexFile() == &dex_file) {
2467 return dex_cache;
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002468 }
2469 }
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002470 // Search matching by location name.
2471 std::string location(dex_file.GetLocation());
2472 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002473 mirror::DexCache* dex_cache = GetDexCache(i);
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002474 if (dex_cache->GetDexFile()->GetLocation() == location) {
2475 return dex_cache;
2476 }
2477 }
2478 // Failure, dump diagnostic and abort.
2479 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002480 mirror::DexCache* dex_cache = GetDexCache(i);
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002481 LOG(ERROR) << "Registered dex file " << i << " = " << dex_cache->GetDexFile()->GetLocation();
2482 }
2483 LOG(FATAL) << "Failed to find DexCache for DexFile " << location;
Ian Rogerse0a02da2014-12-02 14:10:53 -08002484 UNREACHABLE();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002485}
2486
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002487void ClassLinker::FixupDexCaches(mirror::ArtMethod* resolution_method) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002488 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers19846512012-02-24 11:42:47 -08002489 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002490 mirror::DexCache* dex_cache = GetDexCache(i);
2491 dex_cache->Fixup(resolution_method);
Ian Rogers19846512012-02-24 11:42:47 -08002492 }
2493}
2494
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002495mirror::Class* ClassLinker::CreatePrimitiveClass(Thread* self, Primitive::Type type) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002496 mirror::Class* klass = AllocClass(self, mirror::Class::PrimitiveClassSize());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002497 if (UNLIKELY(klass == nullptr)) {
2498 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07002499 }
2500 return InitializePrimitiveClass(klass, type);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002501}
2502
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002503mirror::Class* ClassLinker::InitializePrimitiveClass(mirror::Class* primitive_class,
2504 Primitive::Type type) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002505 CHECK(primitive_class != nullptr);
Ian Rogers1f539342012-10-03 21:09:42 -07002506 // Must hold lock on object when initializing.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002507 Thread* self = Thread::Current();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002508 StackHandleScope<1> hs(self);
2509 Handle<mirror::Class> h_class(hs.NewHandle(primitive_class));
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07002510 ObjectLock<mirror::Class> lock(self, h_class);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002511 h_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract);
2512 h_class->SetPrimitiveType(type);
2513 mirror::Class::SetStatus(h_class, mirror::Class::kStatusInitialized, self);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002514 const char* descriptor = Primitive::Descriptor(type);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002515 mirror::Class* existing = InsertClass(descriptor, h_class.Get(),
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002516 ComputeModifiedUtf8Hash(descriptor));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002517 CHECK(existing == nullptr) << "InitPrimitiveClass(" << type << ") failed";
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002518 return h_class.Get();
Carl Shapiro565f5072011-07-10 13:39:43 -07002519}
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002520
Brian Carlstrombe977852011-07-19 14:54:54 -07002521// Create an array class (i.e. the class object for the array, not the
2522// array itself). "descriptor" looks like "[C" or "[[[[B" or
2523// "[Ljava/lang/String;".
2524//
2525// If "descriptor" refers to an array of primitives, look up the
2526// primitive type's internally-generated class object.
2527//
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002528// "class_loader" is the class loader of the class that's referring to
2529// us. It's used to ensure that we're looking for the element type in
2530// the right context. It does NOT become the class loader for the
2531// array class; that always comes from the base element class.
Brian Carlstrombe977852011-07-19 14:54:54 -07002532//
Mathieu Chartier2cebb242015-04-21 16:50:40 -07002533// Returns null with an exception raised on failure.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002534mirror::Class* ClassLinker::CreateArrayClass(Thread* self, const char* descriptor, size_t hash,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002535 Handle<mirror::ClassLoader> class_loader) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002536 // Identify the underlying component type
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002537 CHECK_EQ('[', descriptor[0]);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002538 StackHandleScope<2> hs(self);
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002539 MutableHandle<mirror::Class> component_type(hs.NewHandle(FindClass(self, descriptor + 1,
2540 class_loader)));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002541 if (component_type.Get() == nullptr) {
Mathieu Chartierc0a9ea42014-02-03 16:36:49 -08002542 DCHECK(self->IsExceptionPending());
Andreas Gampedc13d7d2014-07-23 20:18:36 -07002543 // We need to accept erroneous classes as component types.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002544 const size_t component_hash = ComputeModifiedUtf8Hash(descriptor + 1);
2545 component_type.Assign(LookupClass(self, descriptor + 1, component_hash, class_loader.Get()));
Andreas Gampedc13d7d2014-07-23 20:18:36 -07002546 if (component_type.Get() == nullptr) {
2547 DCHECK(self->IsExceptionPending());
2548 return nullptr;
2549 } else {
2550 self->ClearException();
2551 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002552 }
Ian Rogers2d10b202014-05-12 19:15:18 -07002553 if (UNLIKELY(component_type->IsPrimitiveVoid())) {
2554 ThrowNoClassDefFoundError("Attempt to create array of void primitive type");
2555 return nullptr;
2556 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002557 // See if the component type is already loaded. Array classes are
2558 // always associated with the class loader of their underlying
2559 // element type -- an array of Strings goes with the loader for
2560 // java/lang/String -- so we need to look for it there. (The
2561 // caller should have checked for the existence of the class
2562 // before calling here, but they did so with *their* class loader,
2563 // not the component type's loader.)
2564 //
2565 // If we find it, the caller adds "loader" to the class' initiating
2566 // loader list, which should prevent us from going through this again.
2567 //
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002568 // This call is unnecessary if "loader" and "component_type->GetClassLoader()"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002569 // are the same, because our caller (FindClass) just did the
2570 // lookup. (Even if we get this wrong we still have correct behavior,
2571 // because we effectively do this lookup again when we add the new
2572 // class to the hash table --- necessary because of possible races with
2573 // other threads.)
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002574 if (class_loader.Get() != component_type->GetClassLoader()) {
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002575 mirror::Class* new_class = LookupClass(self, descriptor, hash, component_type->GetClassLoader());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002576 if (new_class != nullptr) {
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002577 return new_class;
2578 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002579 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002580
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002581 // Fill out the fields in the Class.
2582 //
2583 // It is possible to execute some methods against arrays, because
2584 // all arrays are subclasses of java_lang_Object_, so we need to set
2585 // up a vtable. We can just point at the one in java_lang_Object_.
2586 //
2587 // Array classes are simple enough that we don't need to do a full
2588 // link step.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002589 auto new_class = hs.NewHandle<mirror::Class>(nullptr);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002590 if (UNLIKELY(!init_done_)) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002591 // Classes that were hand created, ie not by FindSystemClass
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002592 if (strcmp(descriptor, "[Ljava/lang/Class;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002593 new_class.Assign(GetClassRoot(kClassArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002594 } else if (strcmp(descriptor, "[Ljava/lang/Object;") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002595 new_class.Assign(GetClassRoot(kObjectArrayClass));
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002596 } else if (strcmp(descriptor, GetClassRootDescriptor(kJavaLangStringArrayClass)) == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002597 new_class.Assign(GetClassRoot(kJavaLangStringArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002598 } else if (strcmp(descriptor,
Ian Rogers6f3dbba2014-10-14 17:41:57 -07002599 GetClassRootDescriptor(kJavaLangReflectArtMethodArrayClass)) == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002600 new_class.Assign(GetClassRoot(kJavaLangReflectArtMethodArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002601 } else if (strcmp(descriptor, "[C") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002602 new_class.Assign(GetClassRoot(kCharArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002603 } else if (strcmp(descriptor, "[I") == 0) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002604 new_class.Assign(GetClassRoot(kIntArrayClass));
Mathieu Chartierc7853442015-03-27 14:35:38 -07002605 } else if (strcmp(descriptor, "[J") == 0) {
2606 new_class.Assign(GetClassRoot(kLongArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002607 }
2608 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002609 if (new_class.Get() == nullptr) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002610 new_class.Assign(AllocClass(self, mirror::Array::ClassSize()));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002611 if (new_class.Get() == nullptr) {
Mathieu Chartierc0a9ea42014-02-03 16:36:49 -08002612 return nullptr;
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002613 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002614 new_class->SetComponentType(component_type.Get());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002615 }
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07002616 ObjectLock<mirror::Class> lock(self, new_class); // Must hold lock on object when initializing.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002617 DCHECK(new_class->GetComponentType() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002618 mirror::Class* java_lang_Object = GetClassRoot(kJavaLangObject);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002619 new_class->SetSuperClass(java_lang_Object);
2620 new_class->SetVTable(java_lang_Object->GetVTable());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002621 new_class->SetPrimitiveType(Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002622 new_class->SetClassLoader(component_type->GetClassLoader());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002623 mirror::Class::SetStatus(new_class, mirror::Class::kStatusLoaded, self);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07002624 {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08002625 StackHandleScope<mirror::Class::kImtSize> hs2(self,
2626 Runtime::Current()->GetImtUnimplementedMethod());
2627 new_class->PopulateEmbeddedImtAndVTable(&hs2);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07002628 }
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002629 mirror::Class::SetStatus(new_class, mirror::Class::kStatusInitialized, self);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002630 // don't need to set new_class->SetObjectSize(..)
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07002631 // because Object::SizeOf delegates to Array::SizeOf
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002632
2633
2634 // All arrays have java/lang/Cloneable and java/io/Serializable as
2635 // interfaces. We need to set that up here, so that stuff like
2636 // "instanceof" works right.
2637 //
2638 // Note: The GC could run during the call to FindSystemClass,
2639 // so we need to make sure the class object is GC-valid while we're in
2640 // there. Do this by clearing the interface list so the GC will just
2641 // think that the entries are null.
2642
2643
2644 // Use the single, global copies of "interfaces" and "iftable"
2645 // (remember not to free them for arrays).
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002646 {
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07002647 mirror::IfTable* array_iftable = array_iftable_.Read();
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07002648 CHECK(array_iftable != nullptr);
2649 new_class->SetIfTable(array_iftable);
2650 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002651
Elliott Hughes00626c22013-06-14 15:04:14 -07002652 // Inherit access flags from the component type.
2653 int access_flags = new_class->GetComponentType()->GetAccessFlags();
2654 // Lose any implementation detail flags; in particular, arrays aren't finalizable.
2655 access_flags &= kAccJavaFlagsMask;
2656 // Arrays can't be used as a superclass or interface, so we want to add "abstract final"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002657 // and remove "interface".
Elliott Hughes00626c22013-06-14 15:04:14 -07002658 access_flags |= kAccAbstract | kAccFinal;
2659 access_flags &= ~kAccInterface;
2660
2661 new_class->SetAccessFlags(access_flags);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002662
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002663 mirror::Class* existing = InsertClass(descriptor, new_class.Get(), hash);
Mathieu Chartierc0a9ea42014-02-03 16:36:49 -08002664 if (existing == nullptr) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002665 return new_class.Get();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002666 }
2667 // Another thread must have loaded the class after we
2668 // started but before we finished. Abandon what we've
2669 // done.
2670 //
2671 // (Yes, this happens.)
2672
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002673 return existing;
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002674}
2675
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002676mirror::Class* ClassLinker::FindPrimitiveClass(char type) {
Ian Rogers62f05122014-03-21 11:21:29 -07002677 switch (type) {
2678 case 'B':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002679 return GetClassRoot(kPrimitiveByte);
Ian Rogers62f05122014-03-21 11:21:29 -07002680 case 'C':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002681 return GetClassRoot(kPrimitiveChar);
Ian Rogers62f05122014-03-21 11:21:29 -07002682 case 'D':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002683 return GetClassRoot(kPrimitiveDouble);
Ian Rogers62f05122014-03-21 11:21:29 -07002684 case 'F':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002685 return GetClassRoot(kPrimitiveFloat);
Ian Rogers62f05122014-03-21 11:21:29 -07002686 case 'I':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002687 return GetClassRoot(kPrimitiveInt);
Ian Rogers62f05122014-03-21 11:21:29 -07002688 case 'J':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002689 return GetClassRoot(kPrimitiveLong);
Ian Rogers62f05122014-03-21 11:21:29 -07002690 case 'S':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002691 return GetClassRoot(kPrimitiveShort);
Ian Rogers62f05122014-03-21 11:21:29 -07002692 case 'Z':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002693 return GetClassRoot(kPrimitiveBoolean);
Ian Rogers62f05122014-03-21 11:21:29 -07002694 case 'V':
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002695 return GetClassRoot(kPrimitiveVoid);
Ian Rogers62f05122014-03-21 11:21:29 -07002696 default:
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002697 break;
Carl Shapiro744ad052011-08-06 15:53:36 -07002698 }
Elliott Hughesbd935992011-08-22 11:59:34 -07002699 std::string printable_type(PrintableChar(type));
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002700 ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002701 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002702}
2703
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002704mirror::Class* ClassLinker::InsertClass(const char* descriptor, mirror::Class* klass,
2705 size_t hash) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08002706 if (VLOG_IS_ON(class_linker)) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002707 mirror::DexCache* dex_cache = klass->GetDexCache();
Brian Carlstromae826982011-11-09 01:33:42 -08002708 std::string source;
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002709 if (dex_cache != nullptr) {
Brian Carlstromae826982011-11-09 01:33:42 -08002710 source += " from ";
2711 source += dex_cache->GetLocation()->ToModifiedUtf8();
2712 }
2713 LOG(INFO) << "Loaded class " << descriptor << source;
2714 }
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002715 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002716 mirror::Class* existing = LookupClassFromTableLocked(descriptor, klass->GetClassLoader(), hash);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002717 if (existing != nullptr) {
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002718 return existing;
Ian Rogers5d76c432011-10-31 21:42:49 -07002719 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002720 if (kIsDebugBuild && !klass->IsTemp() && klass->GetClassLoader() == nullptr &&
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002721 dex_cache_image_class_lookup_required_) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002722 // Check a class loaded with the system class loader matches one in the image if the class
2723 // is in the image.
2724 existing = LookupClassFromImage(descriptor);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002725 if (existing != nullptr) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002726 CHECK_EQ(klass, existing);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002727 }
2728 }
Mathieu Chartier4e305412014-02-19 10:54:44 -08002729 VerifyObject(klass);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002730 class_table_.InsertWithHash(GcRoot<mirror::Class>(klass), hash);
Mathieu Chartier893263b2014-03-04 11:07:42 -08002731 if (log_new_class_table_roots_) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002732 new_class_roots_.push_back(GcRoot<mirror::Class>(klass));
Mathieu Chartier893263b2014-03-04 11:07:42 -08002733 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002734 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002735}
2736
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002737mirror::Class* ClassLinker::UpdateClass(const char* descriptor, mirror::Class* klass,
2738 size_t hash) {
2739 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002740 auto existing_it = class_table_.FindWithHash(std::make_pair(descriptor, klass->GetClassLoader()),
2741 hash);
2742 if (existing_it == class_table_.end()) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002743 CHECK(klass->IsProxyClass());
2744 return nullptr;
2745 }
2746
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002747 mirror::Class* existing = existing_it->Read();
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002748 CHECK_NE(existing, klass) << descriptor;
2749 CHECK(!existing->IsResolved()) << descriptor;
2750 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusResolving) << descriptor;
2751
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002752 CHECK(!klass->IsTemp()) << descriptor;
2753 if (kIsDebugBuild && klass->GetClassLoader() == nullptr &&
2754 dex_cache_image_class_lookup_required_) {
2755 // Check a class loaded with the system class loader matches one in the image if the class
2756 // is in the image.
2757 existing = LookupClassFromImage(descriptor);
2758 if (existing != nullptr) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002759 CHECK_EQ(klass, existing) << descriptor;
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002760 }
2761 }
2762 VerifyObject(klass);
2763
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002764 // Update the element in the hash set.
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002765 *existing_it = GcRoot<mirror::Class>(klass);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002766 if (log_new_class_table_roots_) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002767 new_class_roots_.push_back(GcRoot<mirror::Class>(klass));
Mingyao Yang98d1cc82014-05-15 17:02:16 -07002768 }
2769
2770 return existing;
2771}
2772
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002773bool ClassLinker::RemoveClass(const char* descriptor, mirror::ClassLoader* class_loader) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002774 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002775 auto pair = std::make_pair(descriptor, class_loader);
2776 auto it = class_table_.Find(pair);
2777 if (it != class_table_.end()) {
2778 class_table_.Erase(it);
2779 return true;
2780 }
2781 it = pre_zygote_class_table_.Find(pair);
2782 if (it != pre_zygote_class_table_.end()) {
2783 pre_zygote_class_table_.Erase(it);
2784 return true;
Brian Carlstromae826982011-11-09 01:33:42 -08002785 }
2786 return false;
2787}
2788
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002789mirror::Class* ClassLinker::LookupClass(Thread* self, const char* descriptor, size_t hash,
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002790 mirror::ClassLoader* class_loader) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002791 {
Ian Rogers7b078e82014-09-10 14:44:24 -07002792 ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002793 mirror::Class* result = LookupClassFromTableLocked(descriptor, class_loader, hash);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002794 if (result != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002795 return result;
2796 }
Sameer Abu Asal2c6de222013-05-02 17:38:59 -07002797 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002798 if (class_loader != nullptr || !dex_cache_image_class_lookup_required_) {
2799 return nullptr;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002800 } else {
2801 // Lookup failed but need to search dex_caches_.
2802 mirror::Class* result = LookupClassFromImage(descriptor);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002803 if (result != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002804 InsertClass(descriptor, result, hash);
2805 } else {
2806 // Searching the image dex files/caches failed, we don't want to get into this situation
2807 // often as map searches are faster, so after kMaxFailedDexCacheLookups move all image
2808 // classes into the class table.
Ian Rogers68b56852014-08-29 20:19:11 -07002809 constexpr uint32_t kMaxFailedDexCacheLookups = 1000;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002810 if (++failed_dex_cache_class_lookups_ > kMaxFailedDexCacheLookups) {
2811 MoveImageClassesToClassTable();
2812 }
2813 }
2814 return result;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002815 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002816}
2817
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002818mirror::Class* ClassLinker::LookupClassFromTableLocked(const char* descriptor,
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002819 mirror::ClassLoader* class_loader,
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002820 size_t hash) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002821 auto descriptor_pair = std::make_pair(descriptor, class_loader);
2822 auto it = pre_zygote_class_table_.FindWithHash(descriptor_pair, hash);
2823 if (it == pre_zygote_class_table_.end()) {
2824 it = class_table_.FindWithHash(descriptor_pair, hash);
2825 if (it == class_table_.end()) {
2826 return nullptr;
Ian Rogers5d76c432011-10-31 21:42:49 -07002827 }
2828 }
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002829 return it->Read();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002830}
2831
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002832static mirror::ObjectArray<mirror::DexCache>* GetImageDexCaches()
2833 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
2834 gc::space::ImageSpace* image = Runtime::Current()->GetHeap()->GetImageSpace();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002835 CHECK(image != nullptr);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002836 mirror::Object* root = image->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
2837 return root->AsObjectArray<mirror::DexCache>();
2838}
2839
2840void ClassLinker::MoveImageClassesToClassTable() {
2841 Thread* self = Thread::Current();
2842 WriterMutexLock mu(self, *Locks::classlinker_classes_lock_);
2843 if (!dex_cache_image_class_lookup_required_) {
2844 return; // All dex cache classes are already in the class table.
2845 }
Mathieu Chartier2d5f39e2014-09-19 17:52:37 -07002846 ScopedAssertNoThreadSuspension ants(self, "Moving image classes to class table");
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002847 mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches();
Ian Rogers1ff3c982014-08-12 02:30:58 -07002848 std::string temp;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002849 for (int32_t i = 0; i < dex_caches->GetLength(); i++) {
2850 mirror::DexCache* dex_cache = dex_caches->Get(i);
2851 mirror::ObjectArray<mirror::Class>* types = dex_cache->GetResolvedTypes();
2852 for (int32_t j = 0; j < types->GetLength(); j++) {
2853 mirror::Class* klass = types->Get(j);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002854 if (klass != nullptr) {
2855 DCHECK(klass->GetClassLoader() == nullptr);
Ian Rogers1ff3c982014-08-12 02:30:58 -07002856 const char* descriptor = klass->GetDescriptor(&temp);
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08002857 size_t hash = ComputeModifiedUtf8Hash(descriptor);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002858 mirror::Class* existing = LookupClassFromTableLocked(descriptor, nullptr, hash);
2859 if (existing != nullptr) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002860 CHECK_EQ(existing, klass) << PrettyClassAndClassLoader(existing) << " != "
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002861 << PrettyClassAndClassLoader(klass);
2862 } else {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002863 class_table_.Insert(GcRoot<mirror::Class>(klass));
Mathieu Chartier893263b2014-03-04 11:07:42 -08002864 if (log_new_class_table_roots_) {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002865 new_class_roots_.push_back(GcRoot<mirror::Class>(klass));
Mathieu Chartier893263b2014-03-04 11:07:42 -08002866 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002867 }
2868 }
Elliott Hughes6fa602d2011-12-02 17:54:25 -08002869 }
2870 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002871 dex_cache_image_class_lookup_required_ = false;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002872}
2873
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002874void ClassLinker::MoveClassTableToPreZygote() {
2875 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
2876 DCHECK(pre_zygote_class_table_.Empty());
2877 pre_zygote_class_table_ = std::move(class_table_);
2878 class_table_.Clear();
2879}
2880
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002881mirror::Class* ClassLinker::LookupClassFromImage(const char* descriptor) {
Mathieu Chartier2d5f39e2014-09-19 17:52:37 -07002882 ScopedAssertNoThreadSuspension ants(Thread::Current(), "Image class lookup");
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002883 mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches();
2884 for (int32_t i = 0; i < dex_caches->GetLength(); ++i) {
2885 mirror::DexCache* dex_cache = dex_caches->Get(i);
2886 const DexFile* dex_file = dex_cache->GetDexFile();
Vladimir Marko801a8112014-01-06 14:28:16 +00002887 // Try binary searching the string/type index.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002888 const DexFile::StringId* string_id = dex_file->FindStringId(descriptor);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002889 if (string_id != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002890 const DexFile::TypeId* type_id =
2891 dex_file->FindTypeId(dex_file->GetIndexForStringId(*string_id));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002892 if (type_id != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002893 uint16_t type_idx = dex_file->GetIndexForTypeId(*type_id);
2894 mirror::Class* klass = dex_cache->GetResolvedType(type_idx);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002895 if (klass != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002896 return klass;
2897 }
2898 }
2899 }
2900 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002901 return nullptr;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002902}
2903
2904void ClassLinker::LookupClasses(const char* descriptor, std::vector<mirror::Class*>& result) {
2905 result.clear();
2906 if (dex_cache_image_class_lookup_required_) {
2907 MoveImageClassesToClassTable();
2908 }
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002909 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
2910 while (true) {
2911 auto it = class_table_.Find(descriptor);
2912 if (it == class_table_.end()) {
2913 break;
Elliott Hughes6fa602d2011-12-02 17:54:25 -08002914 }
Mathieu Chartierc2e20622014-11-03 11:41:47 -08002915 result.push_back(it->Read());
2916 class_table_.Erase(it);
2917 }
2918 for (mirror::Class* k : result) {
2919 class_table_.Insert(GcRoot<mirror::Class>(k));
2920 }
2921 size_t pre_zygote_start = result.size();
2922 // Now handle the pre zygote table.
2923 // Note: This dirties the pre-zygote table but shouldn't be an issue since LookupClasses is only
2924 // called from the debugger.
2925 while (true) {
2926 auto it = pre_zygote_class_table_.Find(descriptor);
2927 if (it == pre_zygote_class_table_.end()) {
2928 break;
2929 }
2930 result.push_back(it->Read());
2931 pre_zygote_class_table_.Erase(it);
2932 }
2933 for (size_t i = pre_zygote_start; i < result.size(); ++i) {
2934 pre_zygote_class_table_.Insert(GcRoot<mirror::Class>(result[i]));
Elliott Hughes6fa602d2011-12-02 17:54:25 -08002935 }
2936}
2937
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07002938void ClassLinker::VerifyClass(Thread* self, Handle<mirror::Class> klass) {
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002939 // TODO: assert that the monitor on the Class is held
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07002940 ObjectLock<mirror::Class> lock(self, klass);
Elliott Hughesd9c67be2012-02-02 19:54:06 -08002941
Ian Rogers9ffb0392012-09-10 11:56:50 -07002942 // Don't attempt to re-verify if already sufficiently verified.
Andreas Gampebb0c7f62014-09-11 10:59:33 -07002943 if (klass->IsVerified()) {
Andreas Gampe48498592014-09-10 19:48:05 -07002944 EnsurePreverifiedMethods(klass);
jeffhao98eacac2011-09-14 16:11:53 -07002945 return;
2946 }
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002947 if (klass->IsCompileTimeVerified() && Runtime::Current()->IsAotCompiler()) {
Andreas Gampebb0c7f62014-09-11 10:59:33 -07002948 return;
2949 }
jeffhao98eacac2011-09-14 16:11:53 -07002950
Ian Rogers9ffb0392012-09-10 11:56:50 -07002951 // The class might already be erroneous, for example at compile time if we attempted to verify
2952 // this class as a parent to another.
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002953 if (klass->IsErroneous()) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002954 ThrowEarlierClassFailure(klass.Get());
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002955 return;
2956 }
2957
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002958 if (klass->GetStatus() == mirror::Class::kStatusResolved) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002959 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerifying, self);
Ian Rogers9ffb0392012-09-10 11:56:50 -07002960 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002961 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime)
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002962 << PrettyClass(klass.Get());
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002963 CHECK(!Runtime::Current()->IsAotCompiler());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002964 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerifyingAtRuntime, self);
Ian Rogers9ffb0392012-09-10 11:56:50 -07002965 }
jeffhao98eacac2011-09-14 16:11:53 -07002966
Jeff Hao4a200f52014-04-01 14:58:49 -07002967 // Skip verification if disabled.
2968 if (!Runtime::Current()->IsVerificationEnabled()) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07002969 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, self);
Andreas Gampe48498592014-09-10 19:48:05 -07002970 EnsurePreverifiedMethods(klass);
Jeff Hao4a200f52014-04-01 14:58:49 -07002971 return;
2972 }
2973
Ian Rogers9ffb0392012-09-10 11:56:50 -07002974 // Verify super class.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002975 StackHandleScope<2> hs(self);
2976 Handle<mirror::Class> super(hs.NewHandle(klass->GetSuperClass()));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07002977 if (super.Get() != nullptr) {
Ian Rogers9ffb0392012-09-10 11:56:50 -07002978 // Acquire lock to prevent races on verifying the super class.
Andreas Gampe277ccbd2014-11-03 21:36:10 -08002979 ObjectLock<mirror::Class> super_lock(self, super);
Ian Rogers1c5eb702012-02-01 09:18:34 -08002980
2981 if (!super->IsVerified() && !super->IsErroneous()) {
Ian Rogers7b078e82014-09-10 14:44:24 -07002982 VerifyClass(self, super);
Ian Rogers1c5eb702012-02-01 09:18:34 -08002983 }
jeffhaof1e6b7c2012-06-05 18:33:30 -07002984 if (!super->IsCompileTimeVerified()) {
Brian Carlstromf3632832014-05-20 15:36:53 -07002985 std::string error_msg(
2986 StringPrintf("Rejecting class %s that attempts to sub-class erroneous class %s",
2987 PrettyDescriptor(klass.Get()).c_str(),
2988 PrettyDescriptor(super.Get()).c_str()));
Andreas Gampee4301ff2015-02-17 19:25:29 -08002989 LOG(WARNING) << error_msg << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8();
Nicolas Geoffray14691c52015-03-05 10:40:17 +00002990 Handle<mirror::Throwable> cause(hs.NewHandle(self->GetException()));
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002991 if (cause.Get() != nullptr) {
Ian Rogers1c5eb702012-02-01 09:18:34 -08002992 self->ClearException();
2993 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07002994 ThrowVerifyError(klass.Get(), "%s", error_msg.c_str());
2995 if (cause.Get() != nullptr) {
Nicolas Geoffray14691c52015-03-05 10:40:17 +00002996 self->GetException()->SetCause(cause.Get());
Ian Rogers1c5eb702012-02-01 09:18:34 -08002997 }
Jeff Hao22cb09b2013-12-12 14:29:15 -08002998 ClassReference ref(klass->GetDexCache()->GetDexFile(), klass->GetDexClassDefIndex());
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08002999 if (Runtime::Current()->IsAotCompiler()) {
Vladimir Marko2b5eaa22013-12-13 13:59:30 +00003000 Runtime::Current()->GetCompilerCallbacks()->ClassRejected(ref);
3001 }
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003002 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Ian Rogers1c5eb702012-02-01 09:18:34 -08003003 return;
3004 }
3005 }
3006
Elliott Hughes634eb2e2012-03-22 16:06:28 -07003007 // Try to use verification information from the oat file, otherwise do runtime verification.
Ian Rogers4445a7e2012-10-05 17:19:13 -07003008 const DexFile& dex_file = *klass->GetDexCache()->GetDexFile();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003009 mirror::Class::Status oat_file_class_status(mirror::Class::kStatusNotReady);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003010 bool preverified = VerifyClassUsingOatFile(dex_file, klass.Get(), oat_file_class_status);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003011 if (oat_file_class_status == mirror::Class::kStatusError) {
Ian Rogerse6bb3b22013-08-19 21:51:45 -07003012 VLOG(class_linker) << "Skipping runtime verification of erroneous class "
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003013 << PrettyDescriptor(klass.Get()) << " in "
Ian Rogerse6bb3b22013-08-19 21:51:45 -07003014 << klass->GetDexCache()->GetLocation()->ToModifiedUtf8();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003015 ThrowVerifyError(klass.Get(), "Rejecting class %s because it failed compile-time verification",
3016 PrettyDescriptor(klass.Get()).c_str());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003017 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
jeffhaoec014232012-09-05 10:42:25 -07003018 return;
3019 }
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02003020 verifier::MethodVerifier::FailureKind verifier_failure = verifier::MethodVerifier::kNoFailure;
Ian Rogers62d6c772013-02-27 08:32:07 -08003021 std::string error_msg;
jeffhaof1e6b7c2012-06-05 18:33:30 -07003022 if (!preverified) {
Ian Rogers7b078e82014-09-10 14:44:24 -07003023 verifier_failure = verifier::MethodVerifier::VerifyClass(self, klass.Get(),
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003024 Runtime::Current()->IsAotCompiler(),
Ian Rogers8b2c0b92013-09-19 02:56:49 -07003025 &error_msg);
jeffhaof1e6b7c2012-06-05 18:33:30 -07003026 }
3027 if (preverified || verifier_failure != verifier::MethodVerifier::kHardFailure) {
Ian Rogers529781d2012-07-23 17:24:29 -07003028 if (!preverified && verifier_failure != verifier::MethodVerifier::kNoFailure) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003029 VLOG(class_linker) << "Soft verification failure in class " << PrettyDescriptor(klass.Get())
Ian Rogers529781d2012-07-23 17:24:29 -07003030 << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8()
3031 << " because: " << error_msg;
3032 }
Ian Rogers1f539342012-10-03 21:09:42 -07003033 self->AssertNoPendingException();
jeffhaoe4f0b2a2012-08-30 11:18:57 -07003034 // Make sure all classes referenced by catch blocks are resolved.
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003035 ResolveClassExceptionHandlerTypes(dex_file, klass);
jeffhaoe4f0b2a2012-08-30 11:18:57 -07003036 if (verifier_failure == verifier::MethodVerifier::kNoFailure) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003037 // Even though there were no verifier failures we need to respect whether the super-class
3038 // was verified or requiring runtime reverification.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003039 if (super.Get() == nullptr || super->IsVerified()) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003040 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003041 } else {
3042 CHECK_EQ(super->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003043 mirror::Class::SetStatus(klass, mirror::Class::kStatusRetryVerificationAtRuntime, self);
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07003044 // Pretend a soft failure occured so that we don't consider the class verified below.
3045 verifier_failure = verifier::MethodVerifier::kSoftFailure;
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003046 }
jeffhaoe4f0b2a2012-08-30 11:18:57 -07003047 } else {
3048 CHECK_EQ(verifier_failure, verifier::MethodVerifier::kSoftFailure);
3049 // Soft failures at compile time should be retried at runtime. Soft
3050 // failures at runtime will be handled by slow paths in the generated
3051 // code. Set status accordingly.
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003052 if (Runtime::Current()->IsAotCompiler()) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003053 mirror::Class::SetStatus(klass, mirror::Class::kStatusRetryVerificationAtRuntime, self);
jeffhaoe4f0b2a2012-08-30 11:18:57 -07003054 } else {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003055 mirror::Class::SetStatus(klass, mirror::Class::kStatusVerified, self);
Andreas Gampebb0c7f62014-09-11 10:59:33 -07003056 // As this is a fake verified status, make sure the methods are _not_ marked preverified
3057 // later.
Ian Rogers7b078e82014-09-10 14:44:24 -07003058 klass->SetPreverified();
jeffhaoe4f0b2a2012-08-30 11:18:57 -07003059 }
3060 }
jeffhao5cfd6fb2011-09-27 13:54:29 -07003061 } else {
Andreas Gampee4301ff2015-02-17 19:25:29 -08003062 LOG(WARNING) << "Verification failed on class " << PrettyDescriptor(klass.Get())
Ian Rogers1c5eb702012-02-01 09:18:34 -08003063 << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8()
3064 << " because: " << error_msg;
Ian Rogers00f7d0e2012-07-19 15:28:27 -07003065 self->AssertNoPendingException();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003066 ThrowVerifyError(klass.Get(), "%s", error_msg.c_str());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003067 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
jeffhao5cfd6fb2011-09-27 13:54:29 -07003068 }
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02003069 if (preverified || verifier_failure == verifier::MethodVerifier::kNoFailure) {
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07003070 // Class is verified so we don't need to do any access check on its methods.
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02003071 // Let the interpreter know it by setting the kAccPreverified flag onto each
3072 // method.
3073 // Note: we're going here during compilation and at runtime. When we set the
3074 // kAccPreverified flag when compiling image classes, the flag is recorded
3075 // in the image and is set when loading the image.
Andreas Gampe48498592014-09-10 19:48:05 -07003076 EnsurePreverifiedMethods(klass);
3077 }
3078}
3079
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003080void ClassLinker::EnsurePreverifiedMethods(Handle<mirror::Class> klass) {
Ian Rogers7b078e82014-09-10 14:44:24 -07003081 if (!klass->IsPreverified()) {
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02003082 klass->SetPreverifiedFlagOnAllMethods();
Ian Rogers7b078e82014-09-10 14:44:24 -07003083 klass->SetPreverified();
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02003084 }
jeffhao98eacac2011-09-14 16:11:53 -07003085}
3086
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003087bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, mirror::Class* klass,
3088 mirror::Class::Status& oat_file_class_status) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003089 // If we're compiling, we can only verify the class using the oat file if
3090 // we are not compiling the image or if the class we're verifying is not part of
3091 // the app. In other words, we will only check for preverification of bootclasspath
3092 // classes.
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003093 if (Runtime::Current()->IsAotCompiler()) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003094 // Are we compiling the bootclasspath?
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07003095 if (Runtime::Current()->GetCompilerCallbacks()->IsBootImage()) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003096 return false;
3097 }
3098 // We are compiling an app (not the image).
3099
3100 // Is this an app class? (I.e. not a bootclasspath class)
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003101 if (klass->GetClassLoader() != nullptr) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003102 return false;
3103 }
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003104 }
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003105
Richard Uhler07b3c232015-03-31 15:57:54 -07003106 const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003107 // In case we run without an image there won't be a backing oat file.
3108 if (oat_dex_file == nullptr) {
Anwar Ghuloumad256bb2013-07-18 14:58:55 -07003109 return false;
3110 }
3111
Andreas Gampe76bd8802014-12-10 16:43:58 -08003112 // We may be running with a preopted oat file but without image. In this case,
3113 // we don't skip verification of preverified classes to ensure we initialize
3114 // dex caches with all types resolved during verification.
3115 // We need to trust image classes, as these might be coming out of a pre-opted, quickened boot
3116 // image (that we just failed loading), and the verifier can't be run on quickened opcodes when
3117 // the runtime isn't started. On the other hand, app classes can be re-verified even if they are
3118 // already pre-opted, as then the runtime is started.
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003119 if (!Runtime::Current()->IsAotCompiler() &&
Andreas Gampe76bd8802014-12-10 16:43:58 -08003120 !Runtime::Current()->GetHeap()->HasImageSpace() &&
3121 klass->GetClassLoader() != nullptr) {
3122 return false;
3123 }
3124
Ian Rogers8b2c0b92013-09-19 02:56:49 -07003125 uint16_t class_def_index = klass->GetDexClassDefIndex();
Vladimir Markod3c5beb2014-04-11 16:32:51 +01003126 oat_file_class_status = oat_dex_file->GetOatClass(class_def_index).GetStatus();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003127 if (oat_file_class_status == mirror::Class::kStatusVerified ||
3128 oat_file_class_status == mirror::Class::kStatusInitialized) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07003129 return true;
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003130 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003131 if (oat_file_class_status == mirror::Class::kStatusRetryVerificationAtRuntime) {
jeffhao1ac29442012-03-26 11:37:32 -07003132 // Compile time verification failed with a soft error. Compile time verification can fail
3133 // because we have incomplete type information. Consider the following:
Ian Rogersc4762272012-02-01 15:55:55 -08003134 // class ... {
3135 // Foo x;
3136 // .... () {
3137 // if (...) {
3138 // v1 gets assigned a type of resolved class Foo
3139 // } else {
3140 // v1 gets assigned a type of unresolved class Bar
3141 // }
3142 // iput x = v1
3143 // } }
3144 // when we merge v1 following the if-the-else it results in Conflict
3145 // (see verifier::RegType::Merge) as we can't know the type of Bar and we could possibly be
3146 // allowing an unsafe assignment to the field x in the iput (javac may have compiled this as
3147 // it knew Bar was a sub-class of Foo, but for us this may have been moved into a separate apk
3148 // at compile time).
3149 return false;
3150 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003151 if (oat_file_class_status == mirror::Class::kStatusError) {
jeffhao1ac29442012-03-26 11:37:32 -07003152 // Compile time verification failed with a hard error. This is caused by invalid instructions
3153 // in the class. These errors are unrecoverable.
3154 return false;
3155 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003156 if (oat_file_class_status == mirror::Class::kStatusNotReady) {
Ian Rogersc4762272012-02-01 15:55:55 -08003157 // Status is uninitialized if we couldn't determine the status at compile time, for example,
3158 // not loading the class.
3159 // TODO: when the verifier doesn't rely on Class-es failing to resolve/load the type hierarchy
3160 // isn't a problem and this case shouldn't occur
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003161 return false;
3162 }
Ian Rogers1ff3c982014-08-12 02:30:58 -07003163 std::string temp;
Elliott Hughes634eb2e2012-03-22 16:06:28 -07003164 LOG(FATAL) << "Unexpected class status: " << oat_file_class_status
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003165 << " " << dex_file.GetLocation() << " " << PrettyClass(klass) << " "
Ian Rogers1ff3c982014-08-12 02:30:58 -07003166 << klass->GetDescriptor(&temp);
Ian Rogerse0a02da2014-12-02 14:10:53 -08003167 UNREACHABLE();
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003168}
3169
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003170void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003171 Handle<mirror::Class> klass) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003172 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
3173 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i));
3174 }
3175 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
3176 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i));
3177 }
3178}
3179
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003180void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file,
Brian Carlstromea46f952013-07-30 01:26:50 -07003181 mirror::ArtMethod* method) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003182 // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod.
3183 const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003184 if (code_item == nullptr) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003185 return; // native or abstract method
3186 }
3187 if (code_item->tries_size_ == 0) {
3188 return; // nothing to process
3189 }
Ian Rogers13735952014-10-08 12:43:28 -07003190 const uint8_t* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0);
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003191 uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr);
3192 ClassLinker* linker = Runtime::Current()->GetClassLinker();
3193 for (uint32_t idx = 0; idx < handlers_size; idx++) {
3194 CatchHandlerIterator iterator(handlers_ptr);
3195 for (; iterator.HasNext(); iterator.Next()) {
3196 // Ensure exception types are resolved so that they don't need resolution to be delivered,
3197 // unresolved exception types will be ignored by exception delivery
3198 if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003199 mirror::Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003200 if (exception_type == nullptr) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08003201 DCHECK(Thread::Current()->IsExceptionPending());
3202 Thread::Current()->ClearException();
3203 }
3204 }
3205 }
3206 handlers_ptr = iterator.EndDataPointer();
3207 }
3208}
3209
Brian Carlstromea46f952013-07-30 01:26:50 -07003210static void CheckProxyConstructor(mirror::ArtMethod* constructor);
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003211static void CheckProxyMethod(Handle<mirror::ArtMethod> method,
3212 Handle<mirror::ArtMethod> prototype);
Ian Rogersc2b44472011-12-14 21:17:17 -08003213
Mathieu Chartier2b7c4d12014-05-19 10:52:16 -07003214mirror::Class* ClassLinker::CreateProxyClass(ScopedObjectAccessAlreadyRunnable& soa, jstring name,
Mathieu Chartier590fee92013-09-13 13:46:47 -07003215 jobjectArray interfaces, jobject loader,
3216 jobjectArray methods, jobjectArray throws) {
3217 Thread* self = soa.Self();
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003218 StackHandleScope<9> hs(self);
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003219 MutableHandle<mirror::Class> klass(hs.NewHandle(
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003220 AllocClass(self, GetClassRoot(kJavaLangClass), sizeof(mirror::Class))));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003221 if (klass.Get() == nullptr) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003222 CHECK(self->IsExceptionPending()); // OOME.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003223 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003224 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003225 DCHECK(klass->GetClass() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003226 klass->SetObjectSize(sizeof(mirror::Proxy));
Andreas Gampe48498592014-09-10 19:48:05 -07003227 // Set the class access flags incl. preverified, so we do not try to set the flag on the methods.
3228 klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal | kAccPreverified);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003229 klass->SetClassLoader(soa.Decode<mirror::ClassLoader*>(loader));
Ian Rogersc2b44472011-12-14 21:17:17 -08003230 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003231 klass->SetName(soa.Decode<mirror::String*>(name));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003232 mirror::Class* proxy_class = GetClassRoot(kJavaLangReflectProxy);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003233 klass->SetDexCache(proxy_class->GetDexCache());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003234 mirror::Class::SetStatus(klass, mirror::Class::kStatusIdx, self);
Ian Rogersc2b44472011-12-14 21:17:17 -08003235
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003236 // Instance fields are inherited, but we add a couple of static fields...
Mathieu Chartierc7853442015-03-27 14:35:38 -07003237 const size_t num_fields = 2;
3238 ArtField* sfields = AllocArtFieldArray(self, num_fields);
3239 klass->SetSFields(sfields);
3240 klass->SetNumStaticFields(num_fields);
3241
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003242 // 1. Create a static field 'interfaces' that holds the _declared_ interfaces implemented by
3243 // our proxy, so Class.getInterfaces doesn't return the flattened set.
Mathieu Chartierc7853442015-03-27 14:35:38 -07003244 ArtField* interfaces_sfield = &sfields[0];
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003245 interfaces_sfield->SetDexFieldIndex(0);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003246 interfaces_sfield->SetDeclaringClass(klass.Get());
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003247 interfaces_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
Mathieu Chartierc7853442015-03-27 14:35:38 -07003248
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003249 // 2. Create a static field 'throws' that holds exceptions thrown by our methods.
Mathieu Chartierc7853442015-03-27 14:35:38 -07003250 ArtField* throws_sfield = &sfields[1];
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003251 throws_sfield->SetDexFieldIndex(1);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003252 throws_sfield->SetDeclaringClass(klass.Get());
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003253 throws_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04003254
Ian Rogers466bb252011-10-14 03:29:56 -07003255 // Proxies have 1 direct method, the constructor
Ian Rogersa436fde2013-08-27 23:34:06 -07003256 {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003257 mirror::ObjectArray<mirror::ArtMethod>* directs = AllocArtMethodArray(self, 1);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003258 if (UNLIKELY(directs == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003259 CHECK(self->IsExceptionPending()); // OOME.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003260 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003261 }
3262 klass->SetDirectMethods(directs);
3263 mirror::ArtMethod* constructor = CreateProxyConstructor(self, klass, proxy_class);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003264 if (UNLIKELY(constructor == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003265 CHECK(self->IsExceptionPending()); // OOME.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003266 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003267 }
3268 klass->SetDirectMethod(0, constructor);
3269 }
Jesse Wilson95caa792011-10-12 18:14:17 -04003270
Mathieu Chartier590fee92013-09-13 13:46:47 -07003271 // Create virtual method using specified prototypes.
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003272 auto h_methods = hs.NewHandle(soa.Decode<mirror::ObjectArray<mirror::Method>*>(methods));
3273 DCHECK_EQ(h_methods->GetClass(), mirror::Method::ArrayClass())
3274 << PrettyClass(h_methods->GetClass());
3275 const size_t num_virtual_methods = h_methods->GetLength();
Ian Rogersa436fde2013-08-27 23:34:06 -07003276 {
Brian Carlstromf3632832014-05-20 15:36:53 -07003277 mirror::ObjectArray<mirror::ArtMethod>* virtuals = AllocArtMethodArray(self,
3278 num_virtual_methods);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003279 if (UNLIKELY(virtuals == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003280 CHECK(self->IsExceptionPending()); // OOME.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003281 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003282 }
3283 klass->SetVirtualMethods(virtuals);
3284 }
Jesse Wilson95caa792011-10-12 18:14:17 -04003285 for (size_t i = 0; i < num_virtual_methods; ++i) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08003286 StackHandleScope<1> hs2(self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003287 Handle<mirror::ArtMethod> prototype(hs2.NewHandle(h_methods->Get(i)->GetArtMethod()));
Ian Rogersa436fde2013-08-27 23:34:06 -07003288 mirror::ArtMethod* clone = CreateProxyMethod(self, klass, prototype);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003289 if (UNLIKELY(clone == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003290 CHECK(self->IsExceptionPending()); // OOME.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003291 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003292 }
3293 klass->SetVirtualMethod(i, clone);
Jesse Wilson95caa792011-10-12 18:14:17 -04003294 }
Ian Rogersc2b44472011-12-14 21:17:17 -08003295
3296 klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003297 mirror::Class::SetStatus(klass, mirror::Class::kStatusLoaded, self); // Now effectively in the loaded state.
Ian Rogers62d6c772013-02-27 08:32:07 -08003298 self->AssertNoPendingException();
Ian Rogersc2b44472011-12-14 21:17:17 -08003299
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003300 std::string descriptor(GetDescriptorForProxy(klass.Get()));
3301 mirror::Class* new_class = nullptr;
Ian Rogersc8982582012-09-07 16:53:25 -07003302 {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003303 // Must hold lock on object when resolved.
3304 ObjectLock<mirror::Class> resolution_lock(self, klass);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003305 // Link the fields and virtual methods, creating vtable and iftables
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003306 Handle<mirror::ObjectArray<mirror::Class> > h_interfaces(
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003307 hs.NewHandle(soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces)));
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003308 if (!LinkClass(self, descriptor.c_str(), klass, h_interfaces, &new_class)) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003309 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003310 return nullptr;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003311 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003312 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003313
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003314 CHECK(klass->IsRetired());
3315 CHECK_NE(klass.Get(), new_class);
3316 klass.Assign(new_class);
3317
3318 CHECK_EQ(interfaces_sfield->GetDeclaringClass(), new_class);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003319 interfaces_sfield->SetObject<false>(klass.Get(),
3320 soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces));
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003321 CHECK_EQ(throws_sfield->GetDeclaringClass(), new_class);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003322 throws_sfield->SetObject<false>(klass.Get(),
3323 soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class> >*>(throws));
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003324
3325 {
3326 // Lock on klass is released. Lock new class object.
3327 ObjectLock<mirror::Class> initialization_lock(self, klass);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003328 mirror::Class::SetStatus(klass, mirror::Class::kStatusInitialized, self);
Ian Rogersc8982582012-09-07 16:53:25 -07003329 }
Ian Rogersc2b44472011-12-14 21:17:17 -08003330
3331 // sanity checks
Elliott Hughes67d92002012-03-26 15:08:51 -07003332 if (kIsDebugBuild) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003333 CHECK(klass->GetIFields() == nullptr);
Ian Rogersc2b44472011-12-14 21:17:17 -08003334 CheckProxyConstructor(klass->GetDirectMethod(0));
3335 for (size_t i = 0; i < num_virtual_methods; ++i) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08003336 StackHandleScope<2> hs2(self);
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003337 Handle<mirror::ArtMethod> prototype(hs2.NewHandle(h_methods->Get(i)->GetArtMethod()));
Andreas Gampe277ccbd2014-11-03 21:36:10 -08003338 Handle<mirror::ArtMethod> virtual_method(hs2.NewHandle(klass->GetVirtualMethod(i)));
Mathieu Chartierbfd9a432014-05-21 17:43:44 -07003339 CheckProxyMethod(virtual_method, prototype);
Ian Rogersc2b44472011-12-14 21:17:17 -08003340 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003341
Mathieu Chartier590fee92013-09-13 13:46:47 -07003342 mirror::String* decoded_name = soa.Decode<mirror::String*>(name);
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003343 std::string interfaces_field_name(StringPrintf("java.lang.Class[] %s.interfaces",
Mathieu Chartier590fee92013-09-13 13:46:47 -07003344 decoded_name->ToModifiedUtf8().c_str()));
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003345 CHECK_EQ(PrettyField(klass->GetStaticField(0)), interfaces_field_name);
3346
3347 std::string throws_field_name(StringPrintf("java.lang.Class[][] %s.throws",
Mathieu Chartier590fee92013-09-13 13:46:47 -07003348 decoded_name->ToModifiedUtf8().c_str()));
Elliott Hughes2ed52c42012-03-21 16:56:56 -07003349 CHECK_EQ(PrettyField(klass->GetStaticField(1)), throws_field_name);
Ian Rogersc2b44472011-12-14 21:17:17 -08003350
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003351 CHECK_EQ(klass.Get()->GetInterfaces(),
Brian Carlstromf3632832014-05-20 15:36:53 -07003352 soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces));
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003353 CHECK_EQ(klass.Get()->GetThrows(),
Brian Carlstromf3632832014-05-20 15:36:53 -07003354 soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class>>*>(throws));
Ian Rogersc2b44472011-12-14 21:17:17 -08003355 }
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08003356 mirror::Class* existing = InsertClass(descriptor.c_str(), klass.Get(),
3357 ComputeModifiedUtf8Hash(descriptor.c_str()));
Mathieu Chartier31b9d662013-10-14 11:53:12 -07003358 CHECK(existing == nullptr);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003359 return klass.Get();
Jesse Wilson95caa792011-10-12 18:14:17 -04003360}
3361
Ian Rogersef7d42f2014-01-06 12:55:46 -08003362std::string ClassLinker::GetDescriptorForProxy(mirror::Class* proxy_class) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003363 DCHECK(proxy_class->IsProxyClass());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003364 mirror::String* name = proxy_class->GetName();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003365 DCHECK(name != nullptr);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003366 return DotToDescriptor(name->ToModifiedUtf8().c_str());
3367}
3368
Ian Rogersef7d42f2014-01-06 12:55:46 -08003369mirror::ArtMethod* ClassLinker::FindMethodForProxy(mirror::Class* proxy_class,
3370 mirror::ArtMethod* proxy_method) {
Ian Rogers16f93672012-02-14 12:29:06 -08003371 DCHECK(proxy_class->IsProxyClass());
3372 DCHECK(proxy_method->IsProxyMethod());
Ian Rogers16f93672012-02-14 12:29:06 -08003373 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07003374 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003375 // Locate the dex cache of the original interface/Object
3376 for (const GcRoot<mirror::DexCache>& root : dex_caches_) {
3377 auto* dex_cache = root.Read();
3378 if (proxy_method->HasSameDexCacheResolvedTypes(dex_cache->GetResolvedTypes())) {
3379 mirror::ArtMethod* resolved_method = dex_cache->GetResolvedMethod(
3380 proxy_method->GetDexMethodIndex());
3381 CHECK(resolved_method != nullptr);
3382 return resolved_method;
Ian Rogers16f93672012-02-14 12:29:06 -08003383 }
3384 }
3385 }
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003386 LOG(FATAL) << "Didn't find dex cache for " << PrettyClass(proxy_class) << " "
3387 << PrettyMethod(proxy_method);
3388 UNREACHABLE();
Ian Rogers16f93672012-02-14 12:29:06 -08003389}
3390
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003391
Brian Carlstromea46f952013-07-30 01:26:50 -07003392mirror::ArtMethod* ClassLinker::CreateProxyConstructor(Thread* self,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003393 Handle<mirror::Class> klass,
Brian Carlstromea46f952013-07-30 01:26:50 -07003394 mirror::Class* proxy_class) {
Ian Rogers466bb252011-10-14 03:29:56 -07003395 // Create constructor for Proxy that must initialize h
Brian Carlstromea46f952013-07-30 01:26:50 -07003396 mirror::ObjectArray<mirror::ArtMethod>* proxy_direct_methods =
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003397 proxy_class->GetDirectMethods();
Brian Carlstromea46f952013-07-30 01:26:50 -07003398 CHECK_EQ(proxy_direct_methods->GetLength(), 16);
3399 mirror::ArtMethod* proxy_constructor = proxy_direct_methods->Get(2);
Sebastien Hertzae94e352014-08-27 15:32:56 +02003400 // Ensure constructor is in dex cache so that we can use the dex cache to look up the overridden
3401 // constructor method.
3402 proxy_class->GetDexCache()->SetResolvedMethod(proxy_constructor->GetDexMethodIndex(),
3403 proxy_constructor);
Jeff Haodb8a6642014-08-14 17:18:52 -07003404 // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its
3405 // code_ too)
Jeff Haof0a3f092014-07-24 16:26:09 -07003406 mirror::ArtMethod* constructor = down_cast<mirror::ArtMethod*>(proxy_constructor->Clone(self));
3407 if (constructor == nullptr) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003408 CHECK(self->IsExceptionPending()); // OOME.
Jeff Haof0a3f092014-07-24 16:26:09 -07003409 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003410 }
Ian Rogers466bb252011-10-14 03:29:56 -07003411 // Make this constructor public and fix the class to be our Proxy version
3412 constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003413 constructor->SetDeclaringClass(klass.Get());
Ian Rogersc2b44472011-12-14 21:17:17 -08003414 return constructor;
3415}
3416
Brian Carlstromea46f952013-07-30 01:26:50 -07003417static void CheckProxyConstructor(mirror::ArtMethod* constructor)
Ian Rogersb726dcb2012-09-05 08:57:23 -07003418 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers466bb252011-10-14 03:29:56 -07003419 CHECK(constructor->IsConstructor());
Mathieu Chartierbfd9a432014-05-21 17:43:44 -07003420 CHECK_STREQ(constructor->GetName(), "<init>");
3421 CHECK_STREQ(constructor->GetSignature().ToString().c_str(),
3422 "(Ljava/lang/reflect/InvocationHandler;)V");
Ian Rogers466bb252011-10-14 03:29:56 -07003423 DCHECK(constructor->IsPublic());
Jesse Wilson95caa792011-10-12 18:14:17 -04003424}
3425
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003426mirror::ArtMethod* ClassLinker::CreateProxyMethod(Thread* self,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003427 Handle<mirror::Class> klass,
3428 Handle<mirror::ArtMethod> prototype) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003429 // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden
3430 // prototype method
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003431 auto* dex_cache = prototype->GetDeclaringClass()->GetDexCache();
3432 // Avoid dirtying the dex cache unless we need to.
3433 if (dex_cache->GetResolvedMethod(prototype->GetDexMethodIndex()) != prototype.Get()) {
3434 dex_cache->SetResolvedMethod(prototype->GetDexMethodIndex(), prototype.Get());
3435 }
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003436 // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize
Ian Rogers466bb252011-10-14 03:29:56 -07003437 // as necessary
Brian Carlstromea46f952013-07-30 01:26:50 -07003438 mirror::ArtMethod* method = down_cast<mirror::ArtMethod*>(prototype->Clone(self));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003439 if (UNLIKELY(method == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003440 CHECK(self->IsExceptionPending()); // OOME.
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003441 return nullptr;
Ian Rogersa436fde2013-08-27 23:34:06 -07003442 }
Ian Rogers466bb252011-10-14 03:29:56 -07003443
3444 // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to
3445 // the intersection of throw exceptions as defined in Proxy
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003446 method->SetDeclaringClass(klass.Get());
Ian Rogers466bb252011-10-14 03:29:56 -07003447 method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04003448
Ian Rogers466bb252011-10-14 03:29:56 -07003449 // At runtime the method looks like a reference and argument saving method, clone the code
3450 // related parameters from this method.
Ian Rogersef7d42f2014-01-06 12:55:46 -08003451 method->SetEntryPointFromQuickCompiledCode(GetQuickProxyInvokeHandler());
Dragos Sbirlea08bf1962013-08-12 08:53:04 -07003452 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Ian Rogers16f93672012-02-14 12:29:06 -08003453
Ian Rogersc2b44472011-12-14 21:17:17 -08003454 return method;
3455}
Jesse Wilson95caa792011-10-12 18:14:17 -04003456
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003457static void CheckProxyMethod(Handle<mirror::ArtMethod> method,
3458 Handle<mirror::ArtMethod> prototype)
Ian Rogersb726dcb2012-09-05 08:57:23 -07003459 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers466bb252011-10-14 03:29:56 -07003460 // Basic sanity
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003461 CHECK(!prototype->IsFinal());
3462 CHECK(method->IsFinal());
3463 CHECK(!method->IsAbstract());
Ian Rogers19846512012-02-24 11:42:47 -08003464
3465 // The proxy method doesn't have its own dex cache or dex file and so it steals those of its
3466 // interface prototype. The exception to this are Constructors and the Class of the Proxy itself.
Andreas Gampe58a5af82014-07-31 16:23:49 -07003467 CHECK(prototype->HasSameDexCacheResolvedMethods(method.Get()));
3468 CHECK(prototype->HasSameDexCacheResolvedTypes(method.Get()));
Mathieu Chartierfc58af42015-04-16 18:00:39 -07003469 CHECK_EQ(prototype->GetDeclaringClass()->GetDexCache(), method->GetDexCache());
Ian Rogers19846512012-02-24 11:42:47 -08003470 CHECK_EQ(prototype->GetDexMethodIndex(), method->GetDexMethodIndex());
3471
Mathieu Chartierbfd9a432014-05-21 17:43:44 -07003472 CHECK_STREQ(method->GetName(), prototype->GetName());
3473 CHECK_STREQ(method->GetShorty(), prototype->GetShorty());
Ian Rogers466bb252011-10-14 03:29:56 -07003474 // More complex sanity - via dex cache
Ian Rogersded66a02014-10-28 18:12:55 -07003475 CHECK_EQ(method->GetInterfaceMethodIfProxy()->GetReturnType(), prototype->GetReturnType());
Jesse Wilson95caa792011-10-12 18:14:17 -04003476}
3477
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003478static bool CanWeInitializeClass(mirror::Class* klass, bool can_init_statics,
3479 bool can_init_parents)
3480 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Brian Carlstrom610e49f2013-11-04 17:07:22 -08003481 if (can_init_statics && can_init_parents) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003482 return true;
3483 }
3484 if (!can_init_statics) {
3485 // Check if there's a class initializer.
Ian Rogersd91d6d62013-09-25 20:26:14 -07003486 mirror::ArtMethod* clinit = klass->FindClassInitializer();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003487 if (clinit != nullptr) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003488 return false;
3489 }
3490 // Check if there are encoded static values needing initialization.
3491 if (klass->NumStaticFields() != 0) {
Mathieu Chartierf8322842014-05-16 10:59:25 -07003492 const DexFile::ClassDef* dex_class_def = klass->GetClassDef();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003493 DCHECK(dex_class_def != nullptr);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003494 if (dex_class_def->static_values_off_ != 0) {
3495 return false;
3496 }
3497 }
3498 }
3499 if (!klass->IsInterface() && klass->HasSuperClass()) {
3500 mirror::Class* super_class = klass->GetSuperClass();
3501 if (!can_init_parents && !super_class->IsInitialized()) {
3502 return false;
3503 } else {
Brian Carlstrom610e49f2013-11-04 17:07:22 -08003504 if (!CanWeInitializeClass(super_class, can_init_statics, can_init_parents)) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003505 return false;
3506 }
3507 }
3508 }
3509 return true;
3510}
3511
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003512bool ClassLinker::InitializeClass(Thread* self, Handle<mirror::Class> klass,
Ian Rogers7b078e82014-09-10 14:44:24 -07003513 bool can_init_statics, bool can_init_parents) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003514 // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol
3515
3516 // Are we already initialized and therefore done?
3517 // Note: we differ from the JLS here as we don't do this under the lock, this is benign as
3518 // an initialized class will never change its state.
3519 if (klass->IsInitialized()) {
3520 return true;
3521 }
3522
3523 // Fast fail if initialization requires a full runtime. Not part of the JLS.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003524 if (!CanWeInitializeClass(klass.Get(), can_init_statics, can_init_parents)) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003525 return false;
3526 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003527
Ian Rogers7b078e82014-09-10 14:44:24 -07003528 self->AllowThreadSuspension();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003529 uint64_t t0;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003530 {
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07003531 ObjectLock<mirror::Class> lock(self, klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003532
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003533 // Re-check under the lock in case another thread initialized ahead of us.
3534 if (klass->IsInitialized()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003535 return true;
3536 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003537
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003538 // Was the class already found to be erroneous? Done under the lock to match the JLS.
Brian Carlstromd1422f82011-09-28 11:37:09 -07003539 if (klass->IsErroneous()) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003540 ThrowEarlierClassFailure(klass.Get());
Brian Carlstromb23eab12014-10-08 17:55:21 -07003541 VlogClassInitializationFailure(klass);
Brian Carlstromd1422f82011-09-28 11:37:09 -07003542 return false;
3543 }
3544
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003545 CHECK(klass->IsResolved()) << PrettyClass(klass.Get()) << ": state=" << klass->GetStatus();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003546
3547 if (!klass->IsVerified()) {
Ian Rogers7b078e82014-09-10 14:44:24 -07003548 VerifyClass(self, klass);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003549 if (!klass->IsVerified()) {
3550 // We failed to verify, expect either the klass to be erroneous or verification failed at
3551 // compile time.
3552 if (klass->IsErroneous()) {
jeffhaoa9b3bf42012-06-06 17:18:39 -07003553 CHECK(self->IsExceptionPending());
Brian Carlstromb23eab12014-10-08 17:55:21 -07003554 VlogClassInitializationFailure(klass);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003555 } else {
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003556 CHECK(Runtime::Current()->IsAotCompiler());
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003557 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime);
jeffhaoa9b3bf42012-06-06 17:18:39 -07003558 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003559 return false;
Mathieu Chartier524507a2014-08-27 15:28:28 -07003560 } else {
3561 self->AssertNoPendingException();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003562 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003563 }
3564
Brian Carlstromd1422f82011-09-28 11:37:09 -07003565 // If the class is kStatusInitializing, either this thread is
3566 // initializing higher up the stack or another thread has beat us
3567 // to initializing and we need to wait. Either way, this
3568 // invocation of InitializeClass will not be responsible for
3569 // running <clinit> and will return.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003570 if (klass->GetStatus() == mirror::Class::kStatusInitializing) {
Mathieu Chartier524507a2014-08-27 15:28:28 -07003571 // Could have got an exception during verification.
3572 if (self->IsExceptionPending()) {
Brian Carlstromb23eab12014-10-08 17:55:21 -07003573 VlogClassInitializationFailure(klass);
Mathieu Chartier524507a2014-08-27 15:28:28 -07003574 return false;
3575 }
Elliott Hughes005ab2e2011-09-11 17:15:31 -07003576 // We caught somebody else in the act; was it us?
Elliott Hughesdcc24742011-09-07 14:02:44 -07003577 if (klass->GetClinitThreadId() == self->GetTid()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003578 // Yes. That's fine. Return so we can continue initializing.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003579 return true;
3580 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07003581 // No. That's fine. Wait for another thread to finish initializing.
3582 return WaitForInitializeClass(klass, self, lock);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003583 }
3584
3585 if (!ValidateSuperClassDescriptors(klass)) {
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003586 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003587 return false;
3588 }
Ian Rogers7b078e82014-09-10 14:44:24 -07003589 self->AllowThreadSuspension();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003590
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003591 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusVerified) << PrettyClass(klass.Get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003592
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003593 // From here out other threads may observe that we're initializing and so changes of state
3594 // require the a notification.
Elliott Hughesdcc24742011-09-07 14:02:44 -07003595 klass->SetClinitThreadId(self->GetTid());
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003596 mirror::Class::SetStatus(klass, mirror::Class::kStatusInitializing, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003597
3598 t0 = NanoTime();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003599 }
3600
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07003601 // Initialize super classes, must be done while initializing for the JLS.
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003602 if (!klass->IsInterface() && klass->HasSuperClass()) {
3603 mirror::Class* super_class = klass->GetSuperClass();
3604 if (!super_class->IsInitialized()) {
3605 CHECK(!super_class->IsInterface());
3606 CHECK(can_init_parents);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003607 StackHandleScope<1> hs(self);
3608 Handle<mirror::Class> handle_scope_super(hs.NewHandle(super_class));
Ian Rogers7b078e82014-09-10 14:44:24 -07003609 bool super_initialized = InitializeClass(self, handle_scope_super, can_init_statics, true);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003610 if (!super_initialized) {
3611 // The super class was verified ahead of entering initializing, we should only be here if
3612 // the super class became erroneous due to initialization.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003613 CHECK(handle_scope_super->IsErroneous() && self->IsExceptionPending())
Brian Carlstromf3632832014-05-20 15:36:53 -07003614 << "Super class initialization failed for "
3615 << PrettyDescriptor(handle_scope_super.Get())
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003616 << " that has unexpected status " << handle_scope_super->GetStatus()
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003617 << "\nPending exception:\n"
Nicolas Geoffray14691c52015-03-05 10:40:17 +00003618 << (self->GetException() != nullptr ? self->GetException()->Dump() : "");
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07003619 ObjectLock<mirror::Class> lock(self, klass);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003620 // Initialization failed because the super-class is erroneous.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003621 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003622 return false;
3623 }
Ian Rogers1bddec32012-02-04 12:27:34 -08003624 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003625 }
3626
Mathieu Chartier05d89ee2014-10-28 13:57:04 -07003627 const size_t num_static_fields = klass->NumStaticFields();
3628 if (num_static_fields > 0) {
Mathieu Chartierf8322842014-05-16 10:59:25 -07003629 const DexFile::ClassDef* dex_class_def = klass->GetClassDef();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003630 CHECK(dex_class_def != nullptr);
Mathieu Chartierf8322842014-05-16 10:59:25 -07003631 const DexFile& dex_file = klass->GetDexFile();
Hiroshi Yamauchi67ef46a2014-08-21 15:59:43 -07003632 StackHandleScope<3> hs(self);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003633 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader()));
Mathieu Chartierf8322842014-05-16 10:59:25 -07003634 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache()));
Mathieu Chartier05d89ee2014-10-28 13:57:04 -07003635
3636 // Eagerly fill in static fields so that the we don't have to do as many expensive
3637 // Class::FindStaticField in ResolveField.
3638 for (size_t i = 0; i < num_static_fields; ++i) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07003639 ArtField* field = klass->GetStaticField(i);
Mathieu Chartier05d89ee2014-10-28 13:57:04 -07003640 const uint32_t field_idx = field->GetDexFieldIndex();
Mathieu Chartierc7853442015-03-27 14:35:38 -07003641 ArtField* resolved_field = dex_cache->GetResolvedField(field_idx, image_pointer_size_);
Mathieu Chartier05d89ee2014-10-28 13:57:04 -07003642 if (resolved_field == nullptr) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07003643 dex_cache->SetResolvedField(field_idx, field, image_pointer_size_);
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07003644 } else {
3645 DCHECK_EQ(field, resolved_field);
Mathieu Chartier05d89ee2014-10-28 13:57:04 -07003646 }
3647 }
3648
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003649 EncodedStaticFieldValueIterator value_it(dex_file, &dex_cache, &class_loader,
3650 this, *dex_class_def);
Ian Rogers13735952014-10-08 12:43:28 -07003651 const uint8_t* class_data = dex_file.GetClassData(*dex_class_def);
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003652 ClassDataItemIterator field_it(dex_file, class_data);
3653 if (value_it.HasNext()) {
3654 DCHECK(field_it.HasNextStaticField());
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003655 CHECK(can_init_statics);
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003656 for ( ; value_it.HasNext(); value_it.Next(), field_it.Next()) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07003657 ArtField* field = ResolveField(
3658 dex_file, field_it.GetMemberIndex(), dex_cache, class_loader, true);
Sebastien Hertzd2fe10a2014-01-15 10:20:56 +01003659 if (Runtime::Current()->IsActiveTransaction()) {
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003660 value_it.ReadValueToField<true>(field);
Sebastien Hertzd2fe10a2014-01-15 10:20:56 +01003661 } else {
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003662 value_it.ReadValueToField<false>(field);
Sebastien Hertzd2fe10a2014-01-15 10:20:56 +01003663 }
Hiroshi Yamauchi88500112014-08-22 12:12:56 -07003664 DCHECK(!value_it.HasNext() || field_it.HasNextStaticField());
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003665 }
3666 }
3667 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003668
Ian Rogersd91d6d62013-09-25 20:26:14 -07003669 mirror::ArtMethod* clinit = klass->FindClassInitializer();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003670 if (clinit != nullptr) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003671 CHECK(can_init_statics);
Ian Rogers5d27faf2014-05-02 17:17:18 -07003672 JValue result;
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003673 clinit->Invoke(self, nullptr, 0, &result, "V");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003674 }
3675
Ian Rogers7b078e82014-09-10 14:44:24 -07003676 self->AllowThreadSuspension();
Elliott Hughes83df2ac2011-10-11 16:37:54 -07003677 uint64_t t1 = NanoTime();
3678
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003679 bool success = true;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003680 {
Mathieu Chartierdb2633c2014-05-16 09:59:29 -07003681 ObjectLock<mirror::Class> lock(self, klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003682
3683 if (self->IsExceptionPending()) {
Brian Carlstromb23eab12014-10-08 17:55:21 -07003684 WrapExceptionInInitializer(klass);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003685 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003686 success = false;
Sebastien Hertz1c80bec2015-02-03 11:58:06 +01003687 } else if (Runtime::Current()->IsTransactionAborted()) {
3688 // The exception thrown when the transaction aborted has been caught and cleared
3689 // so we need to throw it again now.
Sebastien Hertzbd9cf9f2015-03-03 12:16:13 +01003690 VLOG(compiler) << "Return from class initializer of " << PrettyDescriptor(klass.Get())
3691 << " without exception while transaction was aborted: re-throw it now.";
Sebastien Hertz2fd7e692015-04-02 11:11:19 +02003692 Runtime::Current()->ThrowTransactionAbortError(self);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003693 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Sebastien Hertz1c80bec2015-02-03 11:58:06 +01003694 success = false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003695 } else {
Elliott Hughes83df2ac2011-10-11 16:37:54 -07003696 RuntimeStats* global_stats = Runtime::Current()->GetStats();
3697 RuntimeStats* thread_stats = self->GetStats();
3698 ++global_stats->class_init_count;
3699 ++thread_stats->class_init_count;
3700 global_stats->class_init_time_ns += (t1 - t0);
3701 thread_stats->class_init_time_ns += (t1 - t0);
Ian Rogerse6bb3b22013-08-19 21:51:45 -07003702 // Set the class as initialized except if failed to initialize static fields.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003703 mirror::Class::SetStatus(klass, mirror::Class::kStatusInitialized, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003704 if (VLOG_IS_ON(class_linker)) {
Ian Rogers1ff3c982014-08-12 02:30:58 -07003705 std::string temp;
3706 LOG(INFO) << "Initialized class " << klass->GetDescriptor(&temp) << " from " <<
Mathieu Chartierf8322842014-05-16 10:59:25 -07003707 klass->GetLocation();
Brian Carlstromae826982011-11-09 01:33:42 -08003708 }
Brian Carlstrom073278c2014-02-19 15:21:21 -08003709 // Opportunistically set static method trampolines to their destination.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003710 FixupStaticTrampolines(klass.Get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003711 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003712 }
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003713 return success;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003714}
3715
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003716bool ClassLinker::WaitForInitializeClass(Handle<mirror::Class> klass, Thread* self,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003717 ObjectLock<mirror::Class>& lock)
Ian Rogersb726dcb2012-09-05 08:57:23 -07003718 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003719 while (true) {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07003720 self->AssertNoPendingException();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003721 CHECK(!klass->IsInitialized());
Ian Rogers05f30572013-02-20 12:13:11 -08003722 lock.WaitIgnoringInterrupts();
Brian Carlstromd1422f82011-09-28 11:37:09 -07003723
3724 // When we wake up, repeat the test for init-in-progress. If
3725 // there's an exception pending (only possible if
Brian Carlstromb23eab12014-10-08 17:55:21 -07003726 // we were not using WaitIgnoringInterrupts), bail out.
Brian Carlstromd1422f82011-09-28 11:37:09 -07003727 if (self->IsExceptionPending()) {
Brian Carlstromb23eab12014-10-08 17:55:21 -07003728 WrapExceptionInInitializer(klass);
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003729 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Brian Carlstromd1422f82011-09-28 11:37:09 -07003730 return false;
3731 }
3732 // Spurious wakeup? Go back to waiting.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003733 if (klass->GetStatus() == mirror::Class::kStatusInitializing) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003734 continue;
3735 }
Mathieu Chartiere5f13e52015-02-24 09:37:21 -08003736 if (klass->GetStatus() == mirror::Class::kStatusVerified &&
3737 Runtime::Current()->IsAotCompiler()) {
Ian Rogers3d1548d2012-09-24 14:08:03 -07003738 // Compile time initialization failed.
3739 return false;
3740 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07003741 if (klass->IsErroneous()) {
3742 // The caller wants an exception, but it was thrown in a
3743 // different thread. Synthesize one here.
Brian Carlstromdf143242011-10-10 18:05:34 -07003744 ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread",
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003745 PrettyDescriptor(klass.Get()).c_str());
Brian Carlstromb23eab12014-10-08 17:55:21 -07003746 VlogClassInitializationFailure(klass);
Brian Carlstromd1422f82011-09-28 11:37:09 -07003747 return false;
3748 }
3749 if (klass->IsInitialized()) {
3750 return true;
3751 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07003752 LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass.Get()) << " is "
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003753 << klass->GetStatus();
Brian Carlstromd1422f82011-09-28 11:37:09 -07003754 }
Ian Rogers07140832014-09-30 15:43:59 -07003755 UNREACHABLE();
Brian Carlstromd1422f82011-09-28 11:37:09 -07003756}
3757
Ian Rogersb5fb2072014-12-02 17:22:02 -08003758static bool HasSameSignatureWithDifferentClassLoaders(Thread* self,
3759 Handle<mirror::ArtMethod> method1,
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003760 Handle<mirror::ArtMethod> method2,
3761 std::string* error_msg)
Ian Rogersb5fb2072014-12-02 17:22:02 -08003762 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
3763 {
3764 StackHandleScope<1> hs(self);
3765 Handle<mirror::Class> return_type(hs.NewHandle(method1->GetReturnType()));
Vladimir Marko862f43c2015-02-10 18:22:57 +00003766 mirror::Class* other_return_type = method2->GetReturnType();
3767 // NOTE: return_type.Get() must be sequenced after method2->GetReturnType().
3768 if (UNLIKELY(other_return_type != return_type.Get())) {
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003769 *error_msg = StringPrintf("Return types mismatch: %s(%p) vs %s(%p)",
3770 PrettyClassAndClassLoader(return_type.Get()).c_str(),
3771 return_type.Get(),
3772 PrettyClassAndClassLoader(other_return_type).c_str(),
3773 other_return_type);
Ian Rogersb5fb2072014-12-02 17:22:02 -08003774 return false;
3775 }
3776 }
3777 const DexFile::TypeList* types1 = method1->GetParameterTypeList();
3778 const DexFile::TypeList* types2 = method2->GetParameterTypeList();
3779 if (types1 == nullptr) {
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003780 if (types2 != nullptr && types2->Size() != 0) {
3781 *error_msg = StringPrintf("Type list mismatch with %s",
3782 PrettyMethod(method2.Get(), true).c_str());
3783 return false;
3784 }
3785 return true;
Ian Rogersb5fb2072014-12-02 17:22:02 -08003786 } else if (UNLIKELY(types2 == nullptr)) {
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003787 if (types1->Size() != 0) {
3788 *error_msg = StringPrintf("Type list mismatch with %s",
3789 PrettyMethod(method2.Get(), true).c_str());
3790 return false;
3791 }
3792 return true;
Ian Rogersb5fb2072014-12-02 17:22:02 -08003793 }
3794 uint32_t num_types = types1->Size();
3795 if (UNLIKELY(num_types != types2->Size())) {
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003796 *error_msg = StringPrintf("Type list mismatch with %s",
3797 PrettyMethod(method2.Get(), true).c_str());
Ian Rogersb5fb2072014-12-02 17:22:02 -08003798 return false;
3799 }
3800 for (uint32_t i = 0; i < num_types; ++i) {
Vladimir Marko862f43c2015-02-10 18:22:57 +00003801 StackHandleScope<1> hs(self);
3802 Handle<mirror::Class> param_type(hs.NewHandle(
3803 method1->GetClassFromTypeIndex(types1->GetTypeItem(i).type_idx_, true)));
Ian Rogersb5fb2072014-12-02 17:22:02 -08003804 mirror::Class* other_param_type =
3805 method2->GetClassFromTypeIndex(types2->GetTypeItem(i).type_idx_, true);
Vladimir Marko862f43c2015-02-10 18:22:57 +00003806 // NOTE: param_type.Get() must be sequenced after method2->GetClassFromTypeIndex(...).
3807 if (UNLIKELY(param_type.Get() != other_param_type)) {
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003808 *error_msg = StringPrintf("Parameter %u type mismatch: %s(%p) vs %s(%p)",
3809 i,
3810 PrettyClassAndClassLoader(param_type.Get()).c_str(),
3811 param_type.Get(),
3812 PrettyClassAndClassLoader(other_param_type).c_str(),
3813 other_param_type);
Ian Rogersb5fb2072014-12-02 17:22:02 -08003814 return false;
3815 }
3816 }
3817 return true;
3818}
3819
3820
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003821bool ClassLinker::ValidateSuperClassDescriptors(Handle<mirror::Class> klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003822 if (klass->IsInterface()) {
3823 return true;
3824 }
Ian Rogers151f2212014-05-06 11:27:27 -07003825 // Begin with the methods local to the superclass.
Ian Rogersded66a02014-10-28 18:12:55 -07003826 Thread* self = Thread::Current();
3827 StackHandleScope<2> hs(self);
Ian Rogersb5fb2072014-12-02 17:22:02 -08003828 MutableHandle<mirror::ArtMethod> h_m(hs.NewHandle<mirror::ArtMethod>(nullptr));
3829 MutableHandle<mirror::ArtMethod> super_h_m(hs.NewHandle<mirror::ArtMethod>(nullptr));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003830 if (klass->HasSuperClass() &&
3831 klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) {
Mingyao Yang2cdbad72014-07-16 10:44:41 -07003832 for (int i = klass->GetSuperClass()->GetVTableLength() - 1; i >= 0; --i) {
Ian Rogersb5fb2072014-12-02 17:22:02 -08003833 h_m.Assign(klass->GetVTableEntry(i));
3834 super_h_m.Assign(klass->GetSuperClass()->GetVTableEntry(i));
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003835 if (h_m.Get() != super_h_m.Get()) {
3836 std::string error_msg;
3837 if (!HasSameSignatureWithDifferentClassLoaders(self, h_m, super_h_m, &error_msg)) {
3838 ThrowLinkageError(klass.Get(),
3839 "Class %s method %s resolves differently in superclass %s: %s",
3840 PrettyDescriptor(klass.Get()).c_str(),
3841 PrettyMethod(h_m.Get()).c_str(),
3842 PrettyDescriptor(klass->GetSuperClass()).c_str(),
3843 error_msg.c_str());
3844 return false;
3845 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003846 }
3847 }
3848 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003849 for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) {
Ian Rogers151f2212014-05-06 11:27:27 -07003850 if (klass->GetClassLoader() != klass->GetIfTable()->GetInterface(i)->GetClassLoader()) {
3851 uint32_t num_methods = klass->GetIfTable()->GetInterface(i)->NumVirtualMethods();
3852 for (uint32_t j = 0; j < num_methods; ++j) {
Ian Rogersb5fb2072014-12-02 17:22:02 -08003853 h_m.Assign(klass->GetIfTable()->GetMethodArray(i)->GetWithoutChecks(j));
3854 super_h_m.Assign(klass->GetIfTable()->GetInterface(i)->GetVirtualMethod(j));
Andreas Gamped8ca52e2015-02-13 15:23:18 -08003855 if (h_m.Get() != super_h_m.Get()) {
3856 std::string error_msg;
3857 if (!HasSameSignatureWithDifferentClassLoaders(self, h_m, super_h_m, &error_msg)) {
3858 ThrowLinkageError(klass.Get(),
3859 "Class %s method %s resolves differently in interface %s: %s",
3860 PrettyDescriptor(klass.Get()).c_str(),
3861 PrettyMethod(h_m.Get()).c_str(),
3862 PrettyDescriptor(klass->GetIfTable()->GetInterface(i)).c_str(),
3863 error_msg.c_str());
3864 return false;
3865 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003866 }
3867 }
3868 }
3869 }
3870 return true;
3871}
3872
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003873bool ClassLinker::EnsureInitialized(Thread* self, Handle<mirror::Class> c, bool can_init_fields,
3874 bool can_init_parents) {
Mathieu Chartier0cd81352014-05-22 16:48:55 -07003875 DCHECK(c.Get() != nullptr);
Mathieu Chartier524507a2014-08-27 15:28:28 -07003876 if (c->IsInitialized()) {
Andreas Gampe48498592014-09-10 19:48:05 -07003877 EnsurePreverifiedMethods(c);
Mathieu Chartier524507a2014-08-27 15:28:28 -07003878 return true;
3879 }
Ian Rogers7b078e82014-09-10 14:44:24 -07003880 const bool success = InitializeClass(self, c, can_init_fields, can_init_parents);
Mathieu Chartier524507a2014-08-27 15:28:28 -07003881 if (!success) {
3882 if (can_init_fields && can_init_parents) {
3883 CHECK(self->IsExceptionPending()) << PrettyClass(c.Get());
3884 }
3885 } else {
3886 self->AssertNoPendingException();
Ian Rogers595799e2012-01-11 17:32:51 -08003887 }
3888 return success;
Elliott Hughesf4c21c92011-08-19 17:31:31 -07003889}
3890
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003891void ClassLinker::FixupTemporaryDeclaringClass(mirror::Class* temp_class, mirror::Class* new_class) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07003892 ArtField* fields = new_class->GetIFields();
3893 for (size_t i = 0, count = new_class->NumInstanceFields(); i < count; i++) {
3894 if (fields[i].GetDeclaringClass() == temp_class) {
3895 fields[i].SetDeclaringClass(new_class);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003896 }
3897 }
3898
3899 fields = new_class->GetSFields();
Mathieu Chartierc7853442015-03-27 14:35:38 -07003900 for (size_t i = 0, count = new_class->NumStaticFields(); i < count; i++) {
3901 if (fields[i].GetDeclaringClass() == temp_class) {
3902 fields[i].SetDeclaringClass(new_class);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003903 }
3904 }
3905
3906 mirror::ObjectArray<mirror::ArtMethod>* methods = new_class->GetDirectMethods();
3907 if (methods != nullptr) {
3908 for (int index = 0; index < methods->GetLength(); index ++) {
3909 if (methods->Get(index)->GetDeclaringClass() == temp_class) {
3910 methods->Get(index)->SetDeclaringClass(new_class);
3911 }
3912 }
3913 }
3914
3915 methods = new_class->GetVirtualMethods();
3916 if (methods != nullptr) {
3917 for (int index = 0; index < methods->GetLength(); index ++) {
3918 if (methods->Get(index)->GetDeclaringClass() == temp_class) {
3919 methods->Get(index)->SetDeclaringClass(new_class);
3920 }
3921 }
3922 }
3923}
3924
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07003925bool ClassLinker::LinkClass(Thread* self, const char* descriptor, Handle<mirror::Class> klass,
3926 Handle<mirror::ObjectArray<mirror::Class>> interfaces,
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003927 mirror::Class** new_class) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003928 CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus());
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003929
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003930 if (!LinkSuperClass(klass)) {
3931 return false;
3932 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07003933 StackHandleScope<mirror::Class::kImtSize> imt_handle_scope(
3934 self, Runtime::Current()->GetImtUnimplementedMethod());
3935 if (!LinkMethods(self, klass, interfaces, &imt_handle_scope)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003936 return false;
3937 }
Ian Rogers7b078e82014-09-10 14:44:24 -07003938 if (!LinkInstanceFields(self, klass)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003939 return false;
3940 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003941 size_t class_size;
Ian Rogers7b078e82014-09-10 14:44:24 -07003942 if (!LinkStaticFields(self, klass, &class_size)) {
Brian Carlstrom4873d462011-08-21 15:23:39 -07003943 return false;
3944 }
3945 CreateReferenceInstanceOffsets(klass);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003946 CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus());
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003947
3948 if (!klass->IsTemp() || (!init_done_ && klass->GetClassSize() == class_size)) {
3949 // We don't need to retire this class as it has no embedded tables or it was created the
3950 // correct size during class linker initialization.
3951 CHECK_EQ(klass->GetClassSize(), class_size) << PrettyDescriptor(klass.Get());
3952
3953 if (klass->ShouldHaveEmbeddedImtAndVTable()) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07003954 klass->PopulateEmbeddedImtAndVTable(&imt_handle_scope);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003955 }
3956
3957 // This will notify waiters on klass that saw the not yet resolved
3958 // class in the class_table_ during EnsureResolved.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003959 mirror::Class::SetStatus(klass, mirror::Class::kStatusResolved, self);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003960 *new_class = klass.Get();
3961 } else {
3962 CHECK(!klass->IsResolved());
3963 // Retire the temporary class and create the correctly sized resolved class.
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07003964 *new_class = klass->CopyOf(self, class_size, &imt_handle_scope);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003965 if (UNLIKELY(*new_class == nullptr)) {
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003966 CHECK(self->IsExceptionPending()); // Expect an OOME.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003967 mirror::Class::SetStatus(klass, mirror::Class::kStatusError, self);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003968 return false;
3969 }
3970
3971 CHECK_EQ((*new_class)->GetClassSize(), class_size);
3972 StackHandleScope<1> hs(self);
3973 auto new_class_h = hs.NewHandleWrapper<mirror::Class>(new_class);
3974 ObjectLock<mirror::Class> lock(self, new_class_h);
3975
3976 FixupTemporaryDeclaringClass(klass.Get(), new_class_h.Get());
3977
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08003978 mirror::Class* existing = UpdateClass(descriptor, new_class_h.Get(),
3979 ComputeModifiedUtf8Hash(descriptor));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07003980 CHECK(existing == nullptr || existing == klass.Get());
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003981
3982 // This will notify waiters on temp class that saw the not yet resolved class in the
3983 // class_table_ during EnsureResolved.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003984 mirror::Class::SetStatus(klass, mirror::Class::kStatusRetired, self);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003985
3986 CHECK_EQ(new_class_h->GetStatus(), mirror::Class::kStatusResolving);
3987 // This will notify waiters on new_class that saw the not yet resolved
3988 // class in the class_table_ during EnsureResolved.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07003989 mirror::Class::SetStatus(new_class_h, mirror::Class::kStatusResolved, self);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07003990 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003991 return true;
3992}
3993
Andreas Gampefd9eb392014-11-06 16:52:58 -08003994static void CountMethodsAndFields(ClassDataItemIterator& dex_data,
3995 size_t* virtual_methods,
3996 size_t* direct_methods,
3997 size_t* static_fields,
3998 size_t* instance_fields) {
3999 *virtual_methods = *direct_methods = *static_fields = *instance_fields = 0;
4000
4001 while (dex_data.HasNextStaticField()) {
4002 dex_data.Next();
4003 (*static_fields)++;
4004 }
4005 while (dex_data.HasNextInstanceField()) {
4006 dex_data.Next();
4007 (*instance_fields)++;
4008 }
4009 while (dex_data.HasNextDirectMethod()) {
4010 (*direct_methods)++;
4011 dex_data.Next();
4012 }
4013 while (dex_data.HasNextVirtualMethod()) {
4014 (*virtual_methods)++;
4015 dex_data.Next();
4016 }
4017 DCHECK(!dex_data.HasNext());
4018}
4019
4020static void DumpClass(std::ostream& os,
4021 const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
4022 const char* suffix) {
4023 ClassDataItemIterator dex_data(dex_file, dex_file.GetClassData(dex_class_def));
4024 os << dex_file.GetClassDescriptor(dex_class_def) << suffix << ":\n";
4025 os << " Static fields:\n";
4026 while (dex_data.HasNextStaticField()) {
4027 const DexFile::FieldId& id = dex_file.GetFieldId(dex_data.GetMemberIndex());
4028 os << " " << dex_file.GetFieldTypeDescriptor(id) << " " << dex_file.GetFieldName(id) << "\n";
4029 dex_data.Next();
4030 }
4031 os << " Instance fields:\n";
4032 while (dex_data.HasNextInstanceField()) {
4033 const DexFile::FieldId& id = dex_file.GetFieldId(dex_data.GetMemberIndex());
4034 os << " " << dex_file.GetFieldTypeDescriptor(id) << " " << dex_file.GetFieldName(id) << "\n";
4035 dex_data.Next();
4036 }
4037 os << " Direct methods:\n";
4038 while (dex_data.HasNextDirectMethod()) {
4039 const DexFile::MethodId& id = dex_file.GetMethodId(dex_data.GetMemberIndex());
4040 os << " " << dex_file.GetMethodName(id) << dex_file.GetMethodSignature(id).ToString() << "\n";
4041 dex_data.Next();
4042 }
4043 os << " Virtual methods:\n";
4044 while (dex_data.HasNextVirtualMethod()) {
4045 const DexFile::MethodId& id = dex_file.GetMethodId(dex_data.GetMemberIndex());
4046 os << " " << dex_file.GetMethodName(id) << dex_file.GetMethodSignature(id).ToString() << "\n";
4047 dex_data.Next();
4048 }
4049}
4050
4051static std::string DumpClasses(const DexFile& dex_file1, const DexFile::ClassDef& dex_class_def1,
4052 const DexFile& dex_file2, const DexFile::ClassDef& dex_class_def2) {
4053 std::ostringstream os;
4054 DumpClass(os, dex_file1, dex_class_def1, " (Compile time)");
4055 DumpClass(os, dex_file2, dex_class_def2, " (Runtime)");
4056 return os.str();
4057}
4058
4059
4060// Very simple structural check on whether the classes match. Only compares the number of
4061// methods and fields.
4062static bool SimpleStructuralCheck(const DexFile& dex_file1, const DexFile::ClassDef& dex_class_def1,
4063 const DexFile& dex_file2, const DexFile::ClassDef& dex_class_def2,
4064 std::string* error_msg) {
4065 ClassDataItemIterator dex_data1(dex_file1, dex_file1.GetClassData(dex_class_def1));
4066 ClassDataItemIterator dex_data2(dex_file2, dex_file2.GetClassData(dex_class_def2));
4067
4068 // Counters for current dex file.
4069 size_t dex_virtual_methods1, dex_direct_methods1, dex_static_fields1, dex_instance_fields1;
4070 CountMethodsAndFields(dex_data1, &dex_virtual_methods1, &dex_direct_methods1, &dex_static_fields1,
4071 &dex_instance_fields1);
4072 // Counters for compile-time dex file.
4073 size_t dex_virtual_methods2, dex_direct_methods2, dex_static_fields2, dex_instance_fields2;
4074 CountMethodsAndFields(dex_data2, &dex_virtual_methods2, &dex_direct_methods2, &dex_static_fields2,
4075 &dex_instance_fields2);
4076
4077 if (dex_virtual_methods1 != dex_virtual_methods2) {
4078 std::string class_dump = DumpClasses(dex_file1, dex_class_def1, dex_file2, dex_class_def2);
4079 *error_msg = StringPrintf("Virtual method count off: %zu vs %zu\n%s", dex_virtual_methods1,
4080 dex_virtual_methods2, class_dump.c_str());
4081 return false;
4082 }
4083 if (dex_direct_methods1 != dex_direct_methods2) {
4084 std::string class_dump = DumpClasses(dex_file1, dex_class_def1, dex_file2, dex_class_def2);
4085 *error_msg = StringPrintf("Direct method count off: %zu vs %zu\n%s", dex_direct_methods1,
4086 dex_direct_methods2, class_dump.c_str());
4087 return false;
4088 }
4089 if (dex_static_fields1 != dex_static_fields2) {
4090 std::string class_dump = DumpClasses(dex_file1, dex_class_def1, dex_file2, dex_class_def2);
4091 *error_msg = StringPrintf("Static field count off: %zu vs %zu\n%s", dex_static_fields1,
4092 dex_static_fields2, class_dump.c_str());
4093 return false;
4094 }
4095 if (dex_instance_fields1 != dex_instance_fields2) {
4096 std::string class_dump = DumpClasses(dex_file1, dex_class_def1, dex_file2, dex_class_def2);
4097 *error_msg = StringPrintf("Instance field count off: %zu vs %zu\n%s", dex_instance_fields1,
4098 dex_instance_fields2, class_dump.c_str());
4099 return false;
4100 }
4101
4102 return true;
4103}
4104
4105// Checks whether a the super-class changed from what we had at compile-time. This would
4106// invalidate quickening.
4107static bool CheckSuperClassChange(Handle<mirror::Class> klass,
4108 const DexFile& dex_file,
4109 const DexFile::ClassDef& class_def,
4110 mirror::Class* super_class)
4111 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
4112 // Check for unexpected changes in the superclass.
4113 // Quick check 1) is the super_class class-loader the boot class loader? This always has
4114 // precedence.
4115 if (super_class->GetClassLoader() != nullptr &&
4116 // Quick check 2) different dex cache? Breaks can only occur for different dex files,
4117 // which is implied by different dex cache.
4118 klass->GetDexCache() != super_class->GetDexCache()) {
4119 // Now comes the expensive part: things can be broken if (a) the klass' dex file has a
4120 // definition for the super-class, and (b) the files are in separate oat files. The oat files
4121 // are referenced from the dex file, so do (b) first. Only relevant if we have oat files.
Richard Uhler07b3c232015-03-31 15:57:54 -07004122 const OatDexFile* class_oat_dex_file = dex_file.GetOatDexFile();
4123 const OatFile* class_oat_file = nullptr;
4124 if (class_oat_dex_file != nullptr) {
4125 class_oat_file = class_oat_dex_file->GetOatFile();
4126 }
4127
Andreas Gampefd9eb392014-11-06 16:52:58 -08004128 if (class_oat_file != nullptr) {
Richard Uhler07b3c232015-03-31 15:57:54 -07004129 const OatDexFile* loaded_super_oat_dex_file = super_class->GetDexFile().GetOatDexFile();
4130 const OatFile* loaded_super_oat_file = nullptr;
4131 if (loaded_super_oat_dex_file != nullptr) {
4132 loaded_super_oat_file = loaded_super_oat_dex_file->GetOatFile();
4133 }
4134
Andreas Gampefd9eb392014-11-06 16:52:58 -08004135 if (loaded_super_oat_file != nullptr && class_oat_file != loaded_super_oat_file) {
4136 // Now check (a).
4137 const DexFile::ClassDef* super_class_def = dex_file.FindClassDef(class_def.superclass_idx_);
4138 if (super_class_def != nullptr) {
4139 // Uh-oh, we found something. Do our check.
4140 std::string error_msg;
4141 if (!SimpleStructuralCheck(dex_file, *super_class_def,
4142 super_class->GetDexFile(), *super_class->GetClassDef(),
4143 &error_msg)) {
4144 // Print a warning to the log. This exception might be caught, e.g., as common in test
4145 // drivers. When the class is later tried to be used, we re-throw a new instance, as we
4146 // only save the type of the exception.
4147 LOG(WARNING) << "Incompatible structural change detected: " <<
4148 StringPrintf(
4149 "Structural change of %s is hazardous (%s at compile time, %s at runtime): %s",
4150 PrettyType(super_class_def->class_idx_, dex_file).c_str(),
4151 class_oat_file->GetLocation().c_str(),
4152 loaded_super_oat_file->GetLocation().c_str(),
4153 error_msg.c_str());
4154 ThrowIncompatibleClassChangeError(klass.Get(),
4155 "Structural change of %s is hazardous (%s at compile time, %s at runtime): %s",
4156 PrettyType(super_class_def->class_idx_, dex_file).c_str(),
4157 class_oat_file->GetLocation().c_str(),
4158 loaded_super_oat_file->GetLocation().c_str(),
4159 error_msg.c_str());
4160 return false;
4161 }
4162 }
4163 }
4164 }
4165 }
4166 return true;
4167}
4168
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004169bool ClassLinker::LoadSuperAndInterfaces(Handle<mirror::Class> klass, const DexFile& dex_file) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004170 CHECK_EQ(mirror::Class::kStatusIdx, klass->GetStatus());
Ian Rogers8b2c0b92013-09-19 02:56:49 -07004171 const DexFile::ClassDef& class_def = dex_file.GetClassDef(klass->GetDexClassDefIndex());
4172 uint16_t super_class_idx = class_def.superclass_idx_;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004173 if (super_class_idx != DexFile::kDexNoIndex16) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004174 mirror::Class* super_class = ResolveType(dex_file, super_class_idx, klass.Get());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004175 if (super_class == nullptr) {
Brian Carlstrom65ca0772011-09-24 16:03:08 -07004176 DCHECK(Thread::Current()->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004177 return false;
4178 }
Ian Rogersbe125a92012-01-11 15:19:49 -08004179 // Verify
4180 if (!klass->CanAccess(super_class)) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004181 ThrowIllegalAccessError(klass.Get(), "Class %s extended by class %s is inaccessible",
Ian Rogers62d6c772013-02-27 08:32:07 -08004182 PrettyDescriptor(super_class).c_str(),
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004183 PrettyDescriptor(klass.Get()).c_str());
Ian Rogersbe125a92012-01-11 15:19:49 -08004184 return false;
4185 }
Mingyao Yang98d1cc82014-05-15 17:02:16 -07004186 CHECK(super_class->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004187 klass->SetSuperClass(super_class);
Andreas Gampefd9eb392014-11-06 16:52:58 -08004188
4189 if (!CheckSuperClassChange(klass, dex_file, class_def, super_class)) {
4190 DCHECK(Thread::Current()->IsExceptionPending());
4191 return false;
4192 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004193 }
Ian Rogers8b2c0b92013-09-19 02:56:49 -07004194 const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(class_def);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004195 if (interfaces != nullptr) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004196 for (size_t i = 0; i < interfaces->Size(); i++) {
4197 uint16_t idx = interfaces->GetTypeItem(i).type_idx_;
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004198 mirror::Class* interface = ResolveType(dex_file, idx, klass.Get());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004199 if (interface == nullptr) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004200 DCHECK(Thread::Current()->IsExceptionPending());
4201 return false;
4202 }
4203 // Verify
4204 if (!klass->CanAccess(interface)) {
4205 // TODO: the RI seemed to ignore this in my testing.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004206 ThrowIllegalAccessError(klass.Get(), "Interface %s implemented by class %s is inaccessible",
Ian Rogers62d6c772013-02-27 08:32:07 -08004207 PrettyDescriptor(interface).c_str(),
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004208 PrettyDescriptor(klass.Get()).c_str());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004209 return false;
4210 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004211 }
4212 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07004213 // Mark the class as loaded.
Hiroshi Yamauchi5b783e62015-03-18 17:20:11 -07004214 mirror::Class::SetStatus(klass, mirror::Class::kStatusLoaded, nullptr);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004215 return true;
4216}
4217
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004218bool ClassLinker::LinkSuperClass(Handle<mirror::Class> klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004219 CHECK(!klass->IsPrimitive());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004220 mirror::Class* super = klass->GetSuperClass();
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004221 if (klass.Get() == GetClassRoot(kJavaLangObject)) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004222 if (super != nullptr) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004223 ThrowClassFormatError(klass.Get(), "java.lang.Object must not have a superclass");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004224 return false;
4225 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004226 return true;
4227 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004228 if (super == nullptr) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004229 ThrowLinkageError(klass.Get(), "No superclass defined for class %s",
4230 PrettyDescriptor(klass.Get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004231 return false;
4232 }
4233 // Verify
Elliott Hughes4a2b4172011-09-20 17:08:25 -07004234 if (super->IsFinal() || super->IsInterface()) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004235 ThrowIncompatibleClassChangeError(klass.Get(), "Superclass %s of %s is %s",
Ian Rogers62d6c772013-02-27 08:32:07 -08004236 PrettyDescriptor(super).c_str(),
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004237 PrettyDescriptor(klass.Get()).c_str(),
Ian Rogers62d6c772013-02-27 08:32:07 -08004238 super->IsFinal() ? "declared final" : "an interface");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004239 return false;
4240 }
4241 if (!klass->CanAccess(super)) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004242 ThrowIllegalAccessError(klass.Get(), "Superclass %s is inaccessible to class %s",
Ian Rogers62d6c772013-02-27 08:32:07 -08004243 PrettyDescriptor(super).c_str(),
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004244 PrettyDescriptor(klass.Get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004245 return false;
4246 }
Elliott Hughes20cde902011-10-04 17:37:27 -07004247
Brian Carlstromf3632832014-05-20 15:36:53 -07004248 // Inherit kAccClassIsFinalizable from the superclass in case this
4249 // class doesn't override finalize.
Elliott Hughes20cde902011-10-04 17:37:27 -07004250 if (super->IsFinalizable()) {
4251 klass->SetFinalizable();
4252 }
4253
Elliott Hughes2da50362011-10-10 16:57:08 -07004254 // Inherit reference flags (if any) from the superclass.
4255 int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask);
4256 if (reference_flags != 0) {
4257 klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags);
4258 }
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07004259 // Disallow custom direct subclasses of java.lang.ref.Reference.
Elliott Hughesbf61ba32011-10-11 10:53:09 -07004260 if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004261 ThrowLinkageError(klass.Get(),
Ian Rogers62d6c772013-02-27 08:32:07 -08004262 "Class %s attempts to subclass java.lang.ref.Reference, which is not allowed",
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004263 PrettyDescriptor(klass.Get()).c_str());
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07004264 return false;
4265 }
Elliott Hughes2da50362011-10-10 16:57:08 -07004266
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004267 if (kIsDebugBuild) {
4268 // Ensure super classes are fully resolved prior to resolving fields..
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004269 while (super != nullptr) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004270 CHECK(super->IsResolved());
4271 super = super->GetSuperClass();
4272 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004273 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004274 return true;
4275}
4276
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004277// Populate the class vtable and itable. Compute return type indices.
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004278bool ClassLinker::LinkMethods(Thread* self, Handle<mirror::Class> klass,
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004279 Handle<mirror::ObjectArray<mirror::Class>> interfaces,
4280 StackHandleScope<mirror::Class::kImtSize>* out_imt) {
Ian Rogers7b078e82014-09-10 14:44:24 -07004281 self->AllowThreadSuspension();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004282 if (klass->IsInterface()) {
4283 // No vtable.
4284 size_t count = klass->NumVirtualMethods();
Andreas Gampeab1eb0d2015-02-13 19:23:55 -08004285 if (!IsUint<16>(count)) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004286 ThrowClassFormatError(klass.Get(), "Too many methods on interface: %zd", count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004287 return false;
4288 }
Carl Shapiro565f5072011-07-10 13:39:43 -07004289 for (size_t i = 0; i < count; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004290 klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004291 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004292 } else if (!LinkVirtualMethods(self, klass)) { // Link virtual methods first.
4293 return false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004294 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004295 return LinkInterfaceMethods(self, klass, interfaces, out_imt); // Link interface method last.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004296}
4297
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004298// Comparator for name and signature of a method, used in finding overriding methods. Implementation
4299// avoids the use of handles, if it didn't then rather than compare dex files we could compare dex
4300// caches in the implementation below.
4301class MethodNameAndSignatureComparator FINAL : public ValueObject {
4302 public:
4303 explicit MethodNameAndSignatureComparator(mirror::ArtMethod* method)
4304 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) :
4305 dex_file_(method->GetDexFile()), mid_(&dex_file_->GetMethodId(method->GetDexMethodIndex())),
4306 name_(nullptr), name_len_(0) {
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004307 DCHECK(!method->IsProxyMethod()) << PrettyMethod(method);
4308 }
4309
4310 const char* GetName() {
4311 if (name_ == nullptr) {
4312 name_ = dex_file_->StringDataAndUtf16LengthByIdx(mid_->name_idx_, &name_len_);
4313 }
4314 return name_;
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004315 }
4316
4317 bool HasSameNameAndSignature(mirror::ArtMethod* other)
4318 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
4319 DCHECK(!other->IsProxyMethod()) << PrettyMethod(other);
4320 const DexFile* other_dex_file = other->GetDexFile();
4321 const DexFile::MethodId& other_mid = other_dex_file->GetMethodId(other->GetDexMethodIndex());
4322 if (dex_file_ == other_dex_file) {
4323 return mid_->name_idx_ == other_mid.name_idx_ && mid_->proto_idx_ == other_mid.proto_idx_;
4324 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004325 GetName(); // Only used to make sure its calculated.
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004326 uint32_t other_name_len;
4327 const char* other_name = other_dex_file->StringDataAndUtf16LengthByIdx(other_mid.name_idx_,
4328 &other_name_len);
4329 if (name_len_ != other_name_len || strcmp(name_, other_name) != 0) {
4330 return false;
4331 }
4332 return dex_file_->GetMethodSignature(*mid_) == other_dex_file->GetMethodSignature(other_mid);
4333 }
4334
4335 private:
4336 // Dex file for the method to compare against.
4337 const DexFile* const dex_file_;
4338 // MethodId for the method to compare against.
4339 const DexFile::MethodId* const mid_;
4340 // Lazily computed name from the dex file's strings.
4341 const char* name_;
4342 // Lazily computed name length.
4343 uint32_t name_len_;
4344};
4345
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004346class LinkVirtualHashTable {
4347 public:
4348 LinkVirtualHashTable(Handle<mirror::Class> klass, size_t hash_size, uint32_t* hash_table)
4349 : klass_(klass), hash_size_(hash_size), hash_table_(hash_table) {
4350 std::fill(hash_table_, hash_table_ + hash_size_, invalid_index_);
4351 }
4352 void Add(uint32_t virtual_method_index) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
4353 mirror::ArtMethod* local_method = klass_->GetVirtualMethodDuringLinking(virtual_method_index);
4354 const char* name = local_method->GetName();
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08004355 uint32_t hash = ComputeModifiedUtf8Hash(name);
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004356 uint32_t index = hash % hash_size_;
4357 // Linear probe until we have an empty slot.
4358 while (hash_table_[index] != invalid_index_) {
4359 if (++index == hash_size_) {
4360 index = 0;
4361 }
4362 }
4363 hash_table_[index] = virtual_method_index;
4364 }
4365 uint32_t FindAndRemove(MethodNameAndSignatureComparator* comparator)
4366 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
4367 const char* name = comparator->GetName();
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08004368 uint32_t hash = ComputeModifiedUtf8Hash(name);
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004369 size_t index = hash % hash_size_;
4370 while (true) {
4371 const uint32_t value = hash_table_[index];
4372 // Since linear probe makes continuous blocks, hitting an invalid index means we are done
4373 // the block and can safely assume not found.
4374 if (value == invalid_index_) {
4375 break;
4376 }
4377 if (value != removed_index_) { // This signifies not already overriden.
4378 mirror::ArtMethod* virtual_method =
4379 klass_->GetVirtualMethodDuringLinking(value);
4380 if (comparator->HasSameNameAndSignature(virtual_method->GetInterfaceMethodIfProxy())) {
4381 hash_table_[index] = removed_index_;
4382 return value;
4383 }
4384 }
4385 if (++index == hash_size_) {
4386 index = 0;
4387 }
4388 }
4389 return GetNotFoundIndex();
4390 }
4391 static uint32_t GetNotFoundIndex() {
4392 return invalid_index_;
4393 }
4394
4395 private:
4396 static const uint32_t invalid_index_;
4397 static const uint32_t removed_index_;
4398
4399 Handle<mirror::Class> klass_;
4400 const size_t hash_size_;
4401 uint32_t* const hash_table_;
4402};
4403
4404const uint32_t LinkVirtualHashTable::invalid_index_ = std::numeric_limits<uint32_t>::max();
4405const uint32_t LinkVirtualHashTable::removed_index_ = std::numeric_limits<uint32_t>::max() - 1;
4406
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004407bool ClassLinker::LinkVirtualMethods(Thread* self, Handle<mirror::Class> klass) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004408 const size_t num_virtual_methods = klass->NumVirtualMethods();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004409 if (klass->HasSuperClass()) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004410 const size_t super_vtable_length = klass->GetSuperClass()->GetVTableLength();
4411 const size_t max_count = num_virtual_methods + super_vtable_length;
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004412 StackHandleScope<2> hs(self);
Mingyao Yang38eecb02014-08-13 14:51:03 -07004413 Handle<mirror::Class> super_class(hs.NewHandle(klass->GetSuperClass()));
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004414 MutableHandle<mirror::ObjectArray<mirror::ArtMethod>> vtable;
Mingyao Yang2cdbad72014-07-16 10:44:41 -07004415 if (super_class->ShouldHaveEmbeddedImtAndVTable()) {
4416 vtable = hs.NewHandle(AllocArtMethodArray(self, max_count));
4417 if (UNLIKELY(vtable.Get() == nullptr)) {
4418 CHECK(self->IsExceptionPending()); // OOME.
4419 return false;
4420 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004421 for (size_t i = 0; i < super_vtable_length; i++) {
4422 vtable->SetWithoutChecks<false>(i, super_class->GetEmbeddedVTableEntry(i));
Mingyao Yang2cdbad72014-07-16 10:44:41 -07004423 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004424 if (num_virtual_methods == 0) {
4425 klass->SetVTable(vtable.Get());
4426 return true;
4427 }
Mingyao Yang2cdbad72014-07-16 10:44:41 -07004428 } else {
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004429 mirror::ObjectArray<mirror::ArtMethod>* super_vtable = super_class->GetVTable();
4430 CHECK(super_vtable != nullptr) << PrettyClass(super_class.Get());
4431 if (num_virtual_methods == 0) {
4432 klass->SetVTable(super_vtable);
4433 return true;
4434 }
4435 vtable = hs.NewHandle(super_vtable->CopyOf(self, max_count));
Mingyao Yang2cdbad72014-07-16 10:44:41 -07004436 if (UNLIKELY(vtable.Get() == nullptr)) {
4437 CHECK(self->IsExceptionPending()); // OOME.
4438 return false;
4439 }
Ian Rogersa436fde2013-08-27 23:34:06 -07004440 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004441 // How the algorithm works:
4442 // 1. Populate hash table by adding num_virtual_methods from klass. The values in the hash
4443 // table are: invalid_index for unused slots, index super_vtable_length + i for a virtual
4444 // method which has not been matched to a vtable method, and j if the virtual method at the
4445 // index overrode the super virtual method at index j.
4446 // 2. Loop through super virtual methods, if they overwrite, update hash table to j
4447 // (j < super_vtable_length) to avoid redundant checks. (TODO maybe use this info for reducing
4448 // the need for the initial vtable which we later shrink back down).
4449 // 3. Add non overridden methods to the end of the vtable.
4450 static constexpr size_t kMaxStackHash = 250;
4451 const size_t hash_table_size = num_virtual_methods * 3;
4452 uint32_t* hash_table_ptr;
4453 std::unique_ptr<uint32_t[]> hash_heap_storage;
4454 if (hash_table_size <= kMaxStackHash) {
4455 hash_table_ptr = reinterpret_cast<uint32_t*>(
4456 alloca(hash_table_size * sizeof(*hash_table_ptr)));
4457 } else {
4458 hash_heap_storage.reset(new uint32_t[hash_table_size]);
4459 hash_table_ptr = hash_heap_storage.get();
4460 }
4461 LinkVirtualHashTable hash_table(klass, hash_table_size, hash_table_ptr);
4462 // Add virtual methods to the hash table.
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004463 for (size_t i = 0; i < num_virtual_methods; ++i) {
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004464 hash_table.Add(i);
4465 }
4466 // Loop through each super vtable method and see if they are overriden by a method we added to
4467 // the hash table.
4468 for (size_t j = 0; j < super_vtable_length; ++j) {
4469 // Search the hash table to see if we are overidden by any method.
4470 mirror::ArtMethod* super_method = vtable->GetWithoutChecks(j);
4471 MethodNameAndSignatureComparator super_method_name_comparator(
4472 super_method->GetInterfaceMethodIfProxy());
4473 uint32_t hash_index = hash_table.FindAndRemove(&super_method_name_comparator);
4474 if (hash_index != hash_table.GetNotFoundIndex()) {
4475 mirror::ArtMethod* virtual_method = klass->GetVirtualMethodDuringLinking(hash_index);
4476 if (klass->CanAccessMember(super_method->GetDeclaringClass(),
4477 super_method->GetAccessFlags())) {
4478 if (super_method->IsFinal()) {
4479 ThrowLinkageError(klass.Get(), "Method %s overrides final method in class %s",
4480 PrettyMethod(virtual_method).c_str(),
4481 super_method->GetDeclaringClassDescriptor());
4482 return false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004483 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004484 vtable->SetWithoutChecks<false>(j, virtual_method);
4485 virtual_method->SetMethodIndex(j);
4486 } else {
4487 LOG(WARNING) << "Before Android 4.1, method " << PrettyMethod(virtual_method)
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004488 << " would have incorrectly overridden the package-private method in "
4489 << PrettyDescriptor(super_method->GetDeclaringClassDescriptor());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004490 }
4491 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004492 }
4493 // Add the non overridden methods at the end.
4494 size_t actual_count = super_vtable_length;
4495 for (size_t i = 0; i < num_virtual_methods; ++i) {
4496 mirror::ArtMethod* local_method = klass->GetVirtualMethodDuringLinking(i);
4497 size_t method_idx = local_method->GetMethodIndexDuringLinking();
4498 if (method_idx < super_vtable_length &&
4499 local_method == vtable->GetWithoutChecks(method_idx)) {
4500 continue;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004501 }
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004502 vtable->SetWithoutChecks<false>(actual_count, local_method);
4503 local_method->SetMethodIndex(actual_count);
4504 ++actual_count;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004505 }
Andreas Gampeab1eb0d2015-02-13 19:23:55 -08004506 if (!IsUint<16>(actual_count)) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004507 ThrowClassFormatError(klass.Get(), "Too many methods defined on class: %zd", actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004508 return false;
4509 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004510 // Shrink vtable if possible
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004511 CHECK_LE(actual_count, max_count);
4512 if (actual_count < max_count) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004513 vtable.Assign(vtable->CopyOf(self, actual_count));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004514 if (UNLIKELY(vtable.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004515 CHECK(self->IsExceptionPending()); // OOME.
4516 return false;
4517 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004518 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004519 klass->SetVTable(vtable.Get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004520 } else {
Mathieu Chartierbfd9a432014-05-21 17:43:44 -07004521 CHECK_EQ(klass.Get(), GetClassRoot(kJavaLangObject));
Andreas Gampeab1eb0d2015-02-13 19:23:55 -08004522 if (!IsUint<16>(num_virtual_methods)) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004523 ThrowClassFormatError(klass.Get(), "Too many methods: %d",
4524 static_cast<int>(num_virtual_methods));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004525 return false;
4526 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004527 mirror::ObjectArray<mirror::ArtMethod>* vtable = AllocArtMethodArray(self, num_virtual_methods);
4528 if (UNLIKELY(vtable == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004529 CHECK(self->IsExceptionPending()); // OOME.
4530 return false;
4531 }
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07004532 for (size_t i = 0; i < num_virtual_methods; ++i) {
Brian Carlstromea46f952013-07-30 01:26:50 -07004533 mirror::ArtMethod* virtual_method = klass->GetVirtualMethodDuringLinking(i);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004534 vtable->SetWithoutChecks<false>(i, virtual_method);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004535 virtual_method->SetMethodIndex(i & 0xFFFF);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004536 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004537 klass->SetVTable(vtable);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004538 }
4539 return true;
4540}
4541
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004542bool ClassLinker::LinkInterfaceMethods(Thread* self, Handle<mirror::Class> klass,
4543 Handle<mirror::ObjectArray<mirror::Class>> interfaces,
4544 StackHandleScope<mirror::Class::kImtSize>* out_imt) {
Mathieu Chartierd035c2d2014-10-27 17:30:20 -07004545 StackHandleScope<3> hs(self);
Mathieu Chartierbfd9a432014-05-21 17:43:44 -07004546 Runtime* const runtime = Runtime::Current();
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004547 const bool has_superclass = klass->HasSuperClass();
4548 const size_t super_ifcount = has_superclass ? klass->GetSuperClass()->GetIfTableCount() : 0U;
4549 const bool have_interfaces = interfaces.Get() != nullptr;
4550 const size_t num_interfaces =
4551 have_interfaces ? interfaces->GetLength() : klass->NumDirectInterfaces();
4552 if (num_interfaces == 0) {
4553 if (super_ifcount == 0) {
4554 // Class implements no interfaces.
4555 DCHECK_EQ(klass->GetIfTableCount(), 0);
4556 DCHECK(klass->GetIfTable() == nullptr);
4557 return true;
4558 }
Ian Rogers9bc81912012-10-11 21:43:36 -07004559 // Class implements same interfaces as parent, are any of these not marker interfaces?
4560 bool has_non_marker_interface = false;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004561 mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable();
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004562 for (size_t i = 0; i < super_ifcount; ++i) {
Ian Rogers9bc81912012-10-11 21:43:36 -07004563 if (super_iftable->GetMethodArrayCount(i) > 0) {
4564 has_non_marker_interface = true;
4565 break;
4566 }
4567 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004568 // Class just inherits marker interfaces from parent so recycle parent's iftable.
Ian Rogers9bc81912012-10-11 21:43:36 -07004569 if (!has_non_marker_interface) {
Ian Rogers9bc81912012-10-11 21:43:36 -07004570 klass->SetIfTable(super_iftable);
4571 return true;
4572 }
4573 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004574 size_t ifcount = super_ifcount + num_interfaces;
4575 for (size_t i = 0; i < num_interfaces; i++) {
4576 mirror::Class* interface = have_interfaces ?
4577 interfaces->GetWithoutChecks(i) : mirror::Class::GetDirectInterface(self, klass, i);
4578 DCHECK(interface != nullptr);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004579 if (UNLIKELY(!interface->IsInterface())) {
4580 std::string temp;
4581 ThrowIncompatibleClassChangeError(klass.Get(), "Class %s implements non-interface class %s",
4582 PrettyDescriptor(klass.Get()).c_str(),
4583 PrettyDescriptor(interface->GetDescriptor(&temp)).c_str());
4584 return false;
4585 }
4586 ifcount += interface->GetIfTableCount();
4587 }
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004588 MutableHandle<mirror::IfTable> iftable(hs.NewHandle(AllocIfTable(self, ifcount)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004589 if (UNLIKELY(iftable.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004590 CHECK(self->IsExceptionPending()); // OOME.
4591 return false;
4592 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004593 if (super_ifcount != 0) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004594 mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable();
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07004595 for (size_t i = 0; i < super_ifcount; i++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004596 mirror::Class* super_interface = super_iftable->GetInterface(i);
Ian Rogers9bc81912012-10-11 21:43:36 -07004597 iftable->SetInterface(i, super_interface);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07004598 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004599 }
Ian Rogers7b078e82014-09-10 14:44:24 -07004600 self->AllowThreadSuspension();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004601 // Flatten the interface inheritance hierarchy.
4602 size_t idx = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004603 for (size_t i = 0; i < num_interfaces; i++) {
Mathieu Chartierd035c2d2014-10-27 17:30:20 -07004604 mirror::Class* interface = have_interfaces ? interfaces->Get(i) :
4605 mirror::Class::GetDirectInterface(self, klass, i);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004606 // Check if interface is already in iftable
4607 bool duplicate = false;
4608 for (size_t j = 0; j < idx; j++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004609 mirror::Class* existing_interface = iftable->GetInterface(j);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004610 if (existing_interface == interface) {
4611 duplicate = true;
4612 break;
4613 }
4614 }
4615 if (!duplicate) {
4616 // Add this non-duplicate interface.
Ian Rogers9bc81912012-10-11 21:43:36 -07004617 iftable->SetInterface(idx++, interface);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004618 // Add this interface's non-duplicate super-interfaces.
4619 for (int32_t j = 0; j < interface->GetIfTableCount(); j++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004620 mirror::Class* super_interface = interface->GetIfTable()->GetInterface(j);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004621 bool super_duplicate = false;
4622 for (size_t k = 0; k < idx; k++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004623 mirror::Class* existing_interface = iftable->GetInterface(k);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004624 if (existing_interface == super_interface) {
4625 super_duplicate = true;
4626 break;
4627 }
4628 }
4629 if (!super_duplicate) {
Ian Rogers9bc81912012-10-11 21:43:36 -07004630 iftable->SetInterface(idx++, super_interface);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004631 }
4632 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004633 }
4634 }
Ian Rogers7b078e82014-09-10 14:44:24 -07004635 self->AllowThreadSuspension();
Ian Rogersb52b01a2012-01-12 17:01:38 -08004636 // Shrink iftable in case duplicates were found
4637 if (idx < ifcount) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004638 DCHECK_NE(num_interfaces, 0U);
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004639 iftable.Assign(down_cast<mirror::IfTable*>(iftable->CopyOf(self, idx * mirror::IfTable::kMax)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004640 if (UNLIKELY(iftable.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004641 CHECK(self->IsExceptionPending()); // OOME.
4642 return false;
4643 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08004644 ifcount = idx;
4645 } else {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004646 DCHECK_EQ(idx, ifcount);
Ian Rogersb52b01a2012-01-12 17:01:38 -08004647 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004648 klass->SetIfTable(iftable.Get());
Elliott Hughes4681c802011-09-25 18:04:37 -07004649 // If we're an interface, we don't need the vtable pointers, so we're done.
Ian Rogers9bc81912012-10-11 21:43:36 -07004650 if (klass->IsInterface()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004651 return true;
4652 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004653 size_t miranda_list_size = 0;
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004654 size_t max_miranda_methods = 0; // The max size of miranda_list.
4655 for (size_t i = 0; i < ifcount; ++i) {
4656 max_miranda_methods += iftable->GetInterface(i)->NumVirtualMethods();
4657 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004658 MutableHandle<mirror::ObjectArray<mirror::ArtMethod>>
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004659 miranda_list(hs.NewHandle(AllocArtMethodArray(self, max_miranda_methods)));
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004660 MutableHandle<mirror::ObjectArray<mirror::ArtMethod>> vtable(
4661 hs.NewHandle(klass->GetVTableDuringLinking()));
4662 // Copy the IMT from the super class if possible.
4663 bool extend_super_iftable = false;
4664 if (has_superclass) {
4665 mirror::Class* super_class = klass->GetSuperClass();
4666 extend_super_iftable = true;
4667 if (super_class->ShouldHaveEmbeddedImtAndVTable()) {
4668 for (size_t i = 0; i < mirror::Class::kImtSize; ++i) {
4669 out_imt->SetReference(i, super_class->GetEmbeddedImTableEntry(i));
4670 }
4671 } else {
4672 // No imt in the super class, need to reconstruct from the iftable.
4673 mirror::IfTable* if_table = super_class->GetIfTable();
4674 mirror::ArtMethod* conflict_method = runtime->GetImtConflictMethod();
4675 const size_t length = super_class->GetIfTableCount();
4676 for (size_t i = 0; i < length; ++i) {
4677 mirror::Class* interface = iftable->GetInterface(i);
4678 const size_t num_virtuals = interface->NumVirtualMethods();
4679 const size_t method_array_count = if_table->GetMethodArrayCount(i);
4680 DCHECK_EQ(num_virtuals, method_array_count);
4681 if (method_array_count == 0) {
4682 continue;
4683 }
4684 mirror::ObjectArray<mirror::ArtMethod>* method_array = if_table->GetMethodArray(i);
4685 for (size_t j = 0; j < num_virtuals; ++j) {
4686 mirror::ArtMethod* method = method_array->GetWithoutChecks(j);
4687 if (method->IsMiranda()) {
4688 continue;
4689 }
4690 mirror::ArtMethod* interface_method = interface->GetVirtualMethod(j);
4691 uint32_t imt_index = interface_method->GetDexMethodIndex() % mirror::Class::kImtSize;
4692 mirror::ArtMethod* imt_ref = out_imt->GetReference(imt_index)->AsArtMethod();
4693 if (imt_ref == runtime->GetImtUnimplementedMethod()) {
4694 out_imt->SetReference(imt_index, method);
4695 } else if (imt_ref != conflict_method) {
4696 out_imt->SetReference(imt_index, conflict_method);
4697 }
4698 }
4699 }
4700 }
4701 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07004702 for (size_t i = 0; i < ifcount; ++i) {
Ian Rogers7b078e82014-09-10 14:44:24 -07004703 self->AllowThreadSuspension();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004704 size_t num_methods = iftable->GetInterface(i)->NumVirtualMethods();
Ian Rogers9bc81912012-10-11 21:43:36 -07004705 if (num_methods > 0) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08004706 StackHandleScope<2> hs2(self);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004707 const bool is_super = i < super_ifcount;
4708 const bool super_interface = is_super && extend_super_iftable;
4709 Handle<mirror::ObjectArray<mirror::ArtMethod>> method_array;
4710 Handle<mirror::ObjectArray<mirror::ArtMethod>> input_array;
4711 if (super_interface) {
4712 mirror::IfTable* if_table = klass->GetSuperClass()->GetIfTable();
4713 DCHECK(if_table != nullptr);
4714 DCHECK(if_table->GetMethodArray(i) != nullptr);
4715 // If we are working on a super interface, try extending the existing method array.
Andreas Gampe277ccbd2014-11-03 21:36:10 -08004716 method_array = hs2.NewHandle(if_table->GetMethodArray(i)->Clone(self)->
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004717 AsObjectArray<mirror::ArtMethod>());
4718 // We are overwriting a super class interface, try to only virtual methods instead of the
4719 // whole vtable.
Andreas Gampe277ccbd2014-11-03 21:36:10 -08004720 input_array = hs2.NewHandle(klass->GetVirtualMethods());
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004721 } else {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08004722 method_array = hs2.NewHandle(AllocArtMethodArray(self, num_methods));
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004723 // A new interface, we need the whole vtable incase a new interface method is implemented
4724 // in the whole superclass.
4725 input_array = vtable;
4726 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004727 if (UNLIKELY(method_array.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004728 CHECK(self->IsExceptionPending()); // OOME.
4729 return false;
4730 }
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004731 iftable->SetMethodArray(i, method_array.Get());
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004732 if (input_array.Get() == nullptr) {
4733 // If the added virtual methods is empty, do nothing.
4734 DCHECK(super_interface);
4735 continue;
4736 }
Ian Rogers62d6c772013-02-27 08:32:07 -08004737 for (size_t j = 0; j < num_methods; ++j) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004738 mirror::ArtMethod* interface_method = iftable->GetInterface(i)->GetVirtualMethod(j);
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004739 MethodNameAndSignatureComparator interface_name_comparator(
4740 interface_method->GetInterfaceMethodIfProxy());
Ian Rogers9bc81912012-10-11 21:43:36 -07004741 int32_t k;
4742 // For each method listed in the interface's method list, find the
4743 // matching method in our class's method list. We want to favor the
4744 // subclass over the superclass, which just requires walking
4745 // back from the end of the vtable. (This only matters if the
4746 // superclass defines a private method and this class redefines
4747 // it -- otherwise it would use the same vtable slot. In .dex files
4748 // those don't end up in the virtual method table, so it shouldn't
4749 // matter which direction we go. We walk it backward anyway.)
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004750 for (k = input_array->GetLength() - 1; k >= 0; --k) {
4751 mirror::ArtMethod* vtable_method = input_array->GetWithoutChecks(k);
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004752 mirror::ArtMethod* vtable_method_for_name_comparison =
4753 vtable_method->GetInterfaceMethodIfProxy();
4754 if (interface_name_comparator.HasSameNameAndSignature(
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004755 vtable_method_for_name_comparison)) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004756 if (!vtable_method->IsAbstract() && !vtable_method->IsPublic()) {
Brian Carlstromf3632832014-05-20 15:36:53 -07004757 ThrowIllegalAccessError(
4758 klass.Get(),
4759 "Method '%s' implementing interface method '%s' is not public",
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004760 PrettyMethod(vtable_method).c_str(),
4761 PrettyMethod(interface_method).c_str());
Ian Rogers9bc81912012-10-11 21:43:36 -07004762 return false;
4763 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004764 method_array->SetWithoutChecks<false>(j, vtable_method);
Jeff Hao88474b42013-10-23 16:24:40 -07004765 // Place method in imt if entry is empty, place conflict otherwise.
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004766 uint32_t imt_index = interface_method->GetDexMethodIndex() % mirror::Class::kImtSize;
4767 mirror::ArtMethod* imt_ref = out_imt->GetReference(imt_index)->AsArtMethod();
4768 mirror::ArtMethod* conflict_method = runtime->GetImtConflictMethod();
4769 if (imt_ref == runtime->GetImtUnimplementedMethod()) {
4770 out_imt->SetReference(imt_index, vtable_method);
4771 } else if (imt_ref != conflict_method) {
4772 // If we are not a conflict and we have the same signature and name as the imt entry,
4773 // it must be that we overwrote a superclass vtable entry.
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004774 MethodNameAndSignatureComparator imt_ref_name_comparator(
4775 imt_ref->GetInterfaceMethodIfProxy());
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004776 if (imt_ref_name_comparator.HasSameNameAndSignature(
Mathieu Chartier9f3629d2014-10-28 18:23:02 -07004777 vtable_method_for_name_comparison)) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004778 out_imt->SetReference(imt_index, vtable_method);
4779 } else {
4780 out_imt->SetReference(imt_index, conflict_method);
4781 }
Jeff Hao88474b42013-10-23 16:24:40 -07004782 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004783 break;
4784 }
4785 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004786 if (k < 0 && !super_interface) {
4787 mirror::ArtMethod* miranda_method = nullptr;
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004788 for (size_t l = 0; l < miranda_list_size; ++l) {
4789 mirror::ArtMethod* mir_method = miranda_list->Get(l);
Ian Rogers03b6eaf2014-10-28 09:34:57 -07004790 if (interface_name_comparator.HasSameNameAndSignature(mir_method)) {
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004791 miranda_method = mir_method;
Ian Rogers9bc81912012-10-11 21:43:36 -07004792 break;
4793 }
4794 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004795 if (miranda_method == nullptr) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004796 // Point the interface table at a phantom slot.
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004797 miranda_method = interface_method->Clone(self)->AsArtMethod();
4798 if (UNLIKELY(miranda_method == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004799 CHECK(self->IsExceptionPending()); // OOME.
4800 return false;
4801 }
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004802 DCHECK_LT(miranda_list_size, max_miranda_methods);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004803 miranda_list->Set<false>(miranda_list_size++, miranda_method);
Ian Rogers9bc81912012-10-11 21:43:36 -07004804 }
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004805 method_array->SetWithoutChecks<false>(j, miranda_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004806 }
4807 }
4808 }
4809 }
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004810 if (miranda_list_size > 0) {
Brian Carlstrom913af1b2011-07-23 21:41:13 -07004811 int old_method_count = klass->NumVirtualMethods();
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004812 int new_method_count = old_method_count + miranda_list_size;
Ian Rogersa436fde2013-08-27 23:34:06 -07004813 mirror::ObjectArray<mirror::ArtMethod>* virtuals;
4814 if (old_method_count == 0) {
4815 virtuals = AllocArtMethodArray(self, new_method_count);
4816 } else {
4817 virtuals = klass->GetVirtualMethods()->CopyOf(self, new_method_count);
4818 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004819 if (UNLIKELY(virtuals == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004820 CHECK(self->IsExceptionPending()); // OOME.
4821 return false;
4822 }
4823 klass->SetVirtualMethods(virtuals);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004824
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004825 int old_vtable_count = vtable->GetLength();
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004826 int new_vtable_count = old_vtable_count + miranda_list_size;
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004827 vtable.Assign(vtable->CopyOf(self, new_vtable_count));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004828 if (UNLIKELY(vtable.Get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07004829 CHECK(self->IsExceptionPending()); // OOME.
4830 return false;
4831 }
Hiroshi Yamauchi41369d22014-08-19 13:10:36 -07004832 for (size_t i = 0; i < miranda_list_size; ++i) {
4833 mirror::ArtMethod* method = miranda_list->Get(i);
Ian Rogers9074b992011-10-26 17:41:55 -07004834 // Leave the declaring class alone as type indices are relative to it
Brian Carlstrom92827a52011-10-10 15:50:01 -07004835 method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda);
4836 method->SetMethodIndex(0xFFFF & (old_vtable_count + i));
4837 klass->SetVirtualMethod(old_method_count + i, method);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004838 vtable->SetWithoutChecks<false>(old_vtable_count + i, method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004839 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004840 // TODO: do not assign to the vtable field until it is fully constructed.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07004841 klass->SetVTable(vtable.Get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004842 }
Elliott Hughes4681c802011-09-25 18:04:37 -07004843
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004844 if (kIsDebugBuild) {
Andreas Gampe277ccbd2014-11-03 21:36:10 -08004845 mirror::ObjectArray<mirror::ArtMethod>* check_vtable = klass->GetVTableDuringLinking();
4846 for (int i = 0; i < check_vtable->GetLength(); ++i) {
4847 CHECK(check_vtable->GetWithoutChecks(i) != nullptr);
Mathieu Chartier2d2621a2014-10-23 16:48:06 -07004848 }
Elliott Hughes4681c802011-09-25 18:04:37 -07004849 }
4850
Ian Rogers7b078e82014-09-10 14:44:24 -07004851 self->AllowThreadSuspension();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004852 return true;
4853}
4854
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004855bool ClassLinker::LinkInstanceFields(Thread* self, Handle<mirror::Class> klass) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004856 CHECK(klass.Get() != nullptr);
Ian Rogers7b078e82014-09-10 14:44:24 -07004857 return LinkFields(self, klass, false, nullptr);
Brian Carlstrom4873d462011-08-21 15:23:39 -07004858}
4859
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004860bool ClassLinker::LinkStaticFields(Thread* self, Handle<mirror::Class> klass, size_t* class_size) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004861 CHECK(klass.Get() != nullptr);
Ian Rogers7b078e82014-09-10 14:44:24 -07004862 return LinkFields(self, klass, true, class_size);
Brian Carlstrom4873d462011-08-21 15:23:39 -07004863}
4864
Brian Carlstromdbc05252011-09-09 01:59:59 -07004865struct LinkFieldsComparator {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004866 explicit LinkFieldsComparator() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
4867 }
Ian Rogers00f7d0e2012-07-19 15:28:27 -07004868 // No thread safety analysis as will be called from STL. Checked lock held in constructor.
Mathieu Chartierc7853442015-03-27 14:35:38 -07004869 bool operator()(ArtField* field1, ArtField* field2)
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004870 NO_THREAD_SAFETY_ANALYSIS {
Fred Shih37f05ef2014-07-16 18:38:08 -07004871 // First come reference fields, then 64-bit, then 32-bit, and then 16-bit, then finally 8-bit.
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -07004872 Primitive::Type type1 = field1->GetTypeAsPrimitiveType();
4873 Primitive::Type type2 = field2->GetTypeAsPrimitiveType();
Ian Rogersef7d42f2014-01-06 12:55:46 -08004874 if (type1 != type2) {
Vladimir Markod5777482014-11-12 17:02:02 +00004875 if (type1 == Primitive::kPrimNot) {
4876 // Reference always goes first.
4877 return true;
Ian Rogersef7d42f2014-01-06 12:55:46 -08004878 }
Vladimir Markod5777482014-11-12 17:02:02 +00004879 if (type2 == Primitive::kPrimNot) {
4880 // Reference always goes first.
4881 return false;
4882 }
4883 size_t size1 = Primitive::ComponentSize(type1);
4884 size_t size2 = Primitive::ComponentSize(type2);
4885 if (size1 != size2) {
4886 // Larger primitive types go first.
4887 return size1 > size2;
4888 }
4889 // Primitive types differ but sizes match. Arbitrarily order by primitive type.
4890 return type1 < type2;
Brian Carlstromdbc05252011-09-09 01:59:59 -07004891 }
Vladimir Marko7a7c1db2014-11-17 15:13:34 +00004892 // Same basic group? Then sort by dex field index. This is guaranteed to be sorted
4893 // by name and for equal names by type id index.
4894 // NOTE: This works also for proxies. Their static fields are assigned appropriate indexes.
4895 return field1->GetDexFieldIndex() < field2->GetDexFieldIndex();
Brian Carlstromdbc05252011-09-09 01:59:59 -07004896 }
4897};
4898
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07004899bool ClassLinker::LinkFields(Thread* self, Handle<mirror::Class> klass, bool is_static,
Ian Rogers7b078e82014-09-10 14:44:24 -07004900 size_t* class_size) {
4901 self->AllowThreadSuspension();
Mathieu Chartierc7853442015-03-27 14:35:38 -07004902 const size_t num_fields = is_static ? klass->NumStaticFields() : klass->NumInstanceFields();
4903 ArtField* const fields = is_static ? klass->GetSFields() : klass->GetIFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004904
Mingyao Yang98d1cc82014-05-15 17:02:16 -07004905 // Initialize field_offset
Brian Carlstrom693267a2011-09-06 09:25:34 -07004906 MemberOffset field_offset(0);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004907 if (is_static) {
Vladimir Marko76649e82014-11-10 18:32:59 +00004908 field_offset = klass->GetFirstReferenceStaticFieldOffsetDuringLinking();
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004909 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004910 mirror::Class* super_class = klass->GetSuperClass();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004911 if (super_class != nullptr) {
Brian Carlstromf3632832014-05-20 15:36:53 -07004912 CHECK(super_class->IsResolved())
4913 << PrettyClass(klass.Get()) << " " << PrettyClass(super_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004914 field_offset = MemberOffset(super_class->GetObjectSize());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004915 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004916 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004917
Andreas Gampe2ed8def2014-08-28 14:41:02 -07004918 CHECK_EQ(num_fields == 0, fields == nullptr) << PrettyClass(klass.Get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004919
Brian Carlstromdbc05252011-09-09 01:59:59 -07004920 // we want a relatively stable order so that adding new fields
Elliott Hughesadb460d2011-10-05 17:02:34 -07004921 // minimizes disruption of C++ version such as Class and Method.
Mathieu Chartierc7853442015-03-27 14:35:38 -07004922 std::deque<ArtField*> grouped_and_sorted_fields;
Mathieu Chartier2d5f39e2014-09-19 17:52:37 -07004923 const char* old_no_suspend_cause = self->StartAssertNoThreadSuspension(
Fred Shih37f05ef2014-07-16 18:38:08 -07004924 "Naked ArtField references in deque");
Brian Carlstromdbc05252011-09-09 01:59:59 -07004925 for (size_t i = 0; i < num_fields; i++) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07004926 grouped_and_sorted_fields.push_back(&fields[i]);
Brian Carlstromdbc05252011-09-09 01:59:59 -07004927 }
Mathieu Chartier590fee92013-09-13 13:46:47 -07004928 std::sort(grouped_and_sorted_fields.begin(), grouped_and_sorted_fields.end(),
4929 LinkFieldsComparator());
Brian Carlstromdbc05252011-09-09 01:59:59 -07004930
Fred Shih381e4ca2014-08-25 17:24:27 -07004931 // References should be at the front.
Brian Carlstromdbc05252011-09-09 01:59:59 -07004932 size_t current_field = 0;
4933 size_t num_reference_fields = 0;
Fred Shih381e4ca2014-08-25 17:24:27 -07004934 FieldGaps gaps;
4935
Brian Carlstromdbc05252011-09-09 01:59:59 -07004936 for (; current_field < num_fields; current_field++) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07004937 ArtField* field = grouped_and_sorted_fields.front();
Mathieu Chartier61c5ebc2014-06-05 17:42:53 -07004938 Primitive::Type type = field->GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07004939 bool isPrimitive = type != Primitive::kPrimNot;
Brian Carlstromdbc05252011-09-09 01:59:59 -07004940 if (isPrimitive) {
Brian Carlstrom7934ac22013-07-26 10:54:15 -07004941 break; // past last reference, move on to the next phase
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004942 }
Vladimir Marko76649e82014-11-10 18:32:59 +00004943 if (UNLIKELY(!IsAligned<sizeof(mirror::HeapReference<mirror::Object>)>(
4944 field_offset.Uint32Value()))) {
Fred Shih381e4ca2014-08-25 17:24:27 -07004945 MemberOffset old_offset = field_offset;
4946 field_offset = MemberOffset(RoundUp(field_offset.Uint32Value(), 4));
4947 AddFieldGap(old_offset.Uint32Value(), field_offset.Uint32Value(), &gaps);
4948 }
Vladimir Marko76649e82014-11-10 18:32:59 +00004949 DCHECK(IsAligned<sizeof(mirror::HeapReference<mirror::Object>)>(field_offset.Uint32Value()));
Brian Carlstromdbc05252011-09-09 01:59:59 -07004950 grouped_and_sorted_fields.pop_front();
4951 num_reference_fields++;
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004952 field->SetOffset(field_offset);
Vladimir Marko76649e82014-11-10 18:32:59 +00004953 field_offset = MemberOffset(field_offset.Uint32Value() +
4954 sizeof(mirror::HeapReference<mirror::Object>));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004955 }
Fred Shih381e4ca2014-08-25 17:24:27 -07004956 // Gaps are stored as a max heap which means that we must shuffle from largest to smallest
4957 // otherwise we could end up with suboptimal gap fills.
Vladimir Marko76649e82014-11-10 18:32:59 +00004958 ShuffleForward<8>(&current_field, &field_offset, &grouped_and_sorted_fields, &gaps);
4959 ShuffleForward<4>(&current_field, &field_offset, &grouped_and_sorted_fields, &gaps);
4960 ShuffleForward<2>(&current_field, &field_offset, &grouped_and_sorted_fields, &gaps);
4961 ShuffleForward<1>(&current_field, &field_offset, &grouped_and_sorted_fields, &gaps);
Fred Shih37f05ef2014-07-16 18:38:08 -07004962 CHECK(grouped_and_sorted_fields.empty()) << "Missed " << grouped_and_sorted_fields.size() <<
4963 " fields.";
Ian Rogers7b078e82014-09-10 14:44:24 -07004964 self->EndAssertNoThreadSuspension(old_no_suspend_cause);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004965
Elliott Hughesadb460d2011-10-05 17:02:34 -07004966 // We lie to the GC about the java.lang.ref.Reference.referent field, so it doesn't scan it.
Mathieu Chartier0cd81352014-05-22 16:48:55 -07004967 if (!is_static && klass->DescriptorEquals("Ljava/lang/ref/Reference;")) {
Elliott Hughesadb460d2011-10-05 17:02:34 -07004968 // We know there are no non-reference fields in the Reference classes, and we know
4969 // that 'referent' is alphabetically last, so this is easy...
Brian Carlstromf3632832014-05-20 15:36:53 -07004970 CHECK_EQ(num_reference_fields, num_fields) << PrettyClass(klass.Get());
Mathieu Chartierc7853442015-03-27 14:35:38 -07004971 CHECK_STREQ(fields[num_fields - 1].GetName(), "referent") << PrettyClass(klass.Get());
Elliott Hughesadb460d2011-10-05 17:02:34 -07004972 --num_reference_fields;
4973 }
4974
Mingyao Yang98d1cc82014-05-15 17:02:16 -07004975 size_t size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004976 // Update klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004977 if (is_static) {
4978 klass->SetNumReferenceStaticFields(num_reference_fields);
Mingyao Yang98d1cc82014-05-15 17:02:16 -07004979 *class_size = size;
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004980 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004981 klass->SetNumReferenceInstanceFields(num_reference_fields);
Brian Carlstromdbc05252011-09-09 01:59:59 -07004982 if (!klass->IsVariableSize()) {
Mathieu Chartier2d721012014-11-10 11:08:06 -08004983 if (klass->DescriptorEquals("Ljava/lang/reflect/ArtMethod;")) {
Jeff Haoc7d11882015-02-03 15:08:39 -08004984 size_t pointer_size = GetInstructionSetPointerSize(Runtime::Current()->GetInstructionSet());
4985 klass->SetObjectSize(mirror::ArtMethod::InstanceSize(pointer_size));
Mathieu Chartier2d721012014-11-10 11:08:06 -08004986 } else {
4987 std::string temp;
4988 DCHECK_GE(size, sizeof(mirror::Object)) << klass->GetDescriptor(&temp);
4989 size_t previous_size = klass->GetObjectSize();
4990 if (previous_size != 0) {
4991 // Make sure that we didn't originally have an incorrect size.
4992 CHECK_EQ(previous_size, size) << klass->GetDescriptor(&temp);
4993 }
4994 klass->SetObjectSize(size);
Mathieu Chartier79b4f382013-10-23 15:21:37 -07004995 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004996 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004997 }
Vladimir Marko76649e82014-11-10 18:32:59 +00004998
4999 if (kIsDebugBuild) {
5000 // Make sure that the fields array is ordered by name but all reference
5001 // offsets are at the beginning as far as alignment allows.
5002 MemberOffset start_ref_offset = is_static
5003 ? klass->GetFirstReferenceStaticFieldOffsetDuringLinking()
5004 : klass->GetFirstReferenceInstanceFieldOffset();
5005 MemberOffset end_ref_offset(start_ref_offset.Uint32Value() +
5006 num_reference_fields *
5007 sizeof(mirror::HeapReference<mirror::Object>));
5008 MemberOffset current_ref_offset = start_ref_offset;
5009 for (size_t i = 0; i < num_fields; i++) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07005010 ArtField* field = &fields[i];
5011 VLOG(class_linker) << "LinkFields: " << (is_static ? "static" : "instance")
5012 << " class=" << PrettyClass(klass.Get()) << " field=" << PrettyField(field) << " offset="
5013 << field->GetOffset();
Vladimir Marko76649e82014-11-10 18:32:59 +00005014 if (i != 0) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07005015 ArtField* const prev_field = &fields[i - 1];
Vladimir Marko7a7c1db2014-11-17 15:13:34 +00005016 // NOTE: The field names can be the same. This is not possible in the Java language
5017 // but it's valid Java/dex bytecode and for example proguard can generate such bytecode.
5018 CHECK_LE(strcmp(prev_field->GetName(), field->GetName()), 0);
Vladimir Marko76649e82014-11-10 18:32:59 +00005019 }
5020 Primitive::Type type = field->GetTypeAsPrimitiveType();
5021 bool is_primitive = type != Primitive::kPrimNot;
5022 if (klass->DescriptorEquals("Ljava/lang/ref/Reference;") &&
5023 strcmp("referent", field->GetName()) == 0) {
5024 is_primitive = true; // We lied above, so we have to expect a lie here.
5025 }
5026 MemberOffset offset = field->GetOffsetDuringLinking();
5027 if (is_primitive) {
5028 if (offset.Uint32Value() < end_ref_offset.Uint32Value()) {
5029 // Shuffled before references.
5030 size_t type_size = Primitive::ComponentSize(type);
5031 CHECK_LT(type_size, sizeof(mirror::HeapReference<mirror::Object>));
5032 CHECK_LT(offset.Uint32Value(), start_ref_offset.Uint32Value());
5033 CHECK_LE(offset.Uint32Value() + type_size, start_ref_offset.Uint32Value());
5034 CHECK(!IsAligned<sizeof(mirror::HeapReference<mirror::Object>)>(offset.Uint32Value()));
5035 }
5036 } else {
5037 CHECK_EQ(current_ref_offset.Uint32Value(), offset.Uint32Value());
5038 current_ref_offset = MemberOffset(current_ref_offset.Uint32Value() +
5039 sizeof(mirror::HeapReference<mirror::Object>));
5040 }
5041 }
5042 CHECK_EQ(current_ref_offset.Uint32Value(), end_ref_offset.Uint32Value());
5043 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005044 return true;
5045}
5046
Vladimir Marko76649e82014-11-10 18:32:59 +00005047// Set the bitmap of reference instance field offsets.
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07005048void ClassLinker::CreateReferenceInstanceOffsets(Handle<mirror::Class> klass) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07005049 uint32_t reference_offsets = 0;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005050 mirror::Class* super_class = klass->GetSuperClass();
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005051 // Leave the reference offsets as 0 for mirror::Object (the class field is handled specially).
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005052 if (super_class != nullptr) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07005053 reference_offsets = super_class->GetReferenceInstanceOffsets();
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005054 // Compute reference offsets unless our superclass overflowed.
5055 if (reference_offsets != mirror::Class::kClassWalkSuper) {
5056 size_t num_reference_fields = klass->NumReferenceInstanceFieldsDuringLinking();
Vladimir Marko76649e82014-11-10 18:32:59 +00005057 if (num_reference_fields != 0u) {
5058 // All of the fields that contain object references are guaranteed be grouped in memory
5059 // starting at an appropriately aligned address after super class object data.
5060 uint32_t start_offset = RoundUp(super_class->GetObjectSize(),
5061 sizeof(mirror::HeapReference<mirror::Object>));
5062 uint32_t start_bit = (start_offset - mirror::kObjectHeaderSize) /
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005063 sizeof(mirror::HeapReference<mirror::Object>);
Vladimir Marko76649e82014-11-10 18:32:59 +00005064 if (start_bit + num_reference_fields > 32) {
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005065 reference_offsets = mirror::Class::kClassWalkSuper;
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005066 } else {
Vladimir Marko76649e82014-11-10 18:32:59 +00005067 reference_offsets |= (0xffffffffu << start_bit) &
5068 (0xffffffffu >> (32 - (start_bit + num_reference_fields)));
Ian Rogerscdc1aaf2014-10-09 13:21:38 -07005069 }
5070 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07005071 }
5072 }
Mingyao Yangfaff0f02014-09-10 12:03:22 -07005073 klass->SetReferenceInstanceOffsets(reference_offsets);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005074}
5075
Mathieu Chartier590fee92013-09-13 13:46:47 -07005076mirror::String* ClassLinker::ResolveString(const DexFile& dex_file, uint32_t string_idx,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07005077 Handle<mirror::DexCache> dex_cache) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005078 DCHECK(dex_cache.Get() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005079 mirror::String* resolved = dex_cache->GetResolvedString(string_idx);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005080 if (resolved != nullptr) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005081 return resolved;
5082 }
Ian Rogersdfb325e2013-10-30 01:00:44 -07005083 uint32_t utf16_length;
5084 const char* utf8_data = dex_file.StringDataAndUtf16LengthByIdx(string_idx, &utf16_length);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005085 mirror::String* string = intern_table_->InternStrong(utf16_length, utf8_data);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005086 dex_cache->SetResolvedString(string_idx, string);
5087 return string;
5088}
5089
Mathieu Chartier590fee92013-09-13 13:46:47 -07005090mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx,
Ian Rogersef7d42f2014-01-06 12:55:46 -08005091 mirror::Class* referrer) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005092 StackHandleScope<2> hs(Thread::Current());
5093 Handle<mirror::DexCache> dex_cache(hs.NewHandle(referrer->GetDexCache()));
5094 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(referrer->GetClassLoader()));
Mathieu Chartier590fee92013-09-13 13:46:47 -07005095 return ResolveType(dex_file, type_idx, dex_cache, class_loader);
5096}
5097
5098mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07005099 Handle<mirror::DexCache> dex_cache,
5100 Handle<mirror::ClassLoader> class_loader) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005101 DCHECK(dex_cache.Get() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005102 mirror::Class* resolved = dex_cache->GetResolvedType(type_idx);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005103 if (resolved == nullptr) {
Ian Rogers98379392014-02-24 16:53:16 -08005104 Thread* self = Thread::Current();
Ian Rogers0571d352011-11-03 19:51:38 -07005105 const char* descriptor = dex_file.StringByTypeIdx(type_idx);
Ian Rogers98379392014-02-24 16:53:16 -08005106 resolved = FindClass(self, descriptor, class_loader);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005107 if (resolved != nullptr) {
Jesse Wilson254db0f2011-11-16 16:44:11 -05005108 // TODO: we used to throw here if resolved's class loader was not the
5109 // boot class loader. This was to permit different classes with the
5110 // same name to be loaded simultaneously by different loaders
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07005111 dex_cache->SetResolvedType(type_idx, resolved);
5112 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -08005113 CHECK(self->IsExceptionPending())
Ian Rogerscab01012012-01-10 17:35:46 -08005114 << "Expected pending exception for failed resolution of: " << descriptor;
Ian Rogers62d6c772013-02-27 08:32:07 -08005115 // Convert a ClassNotFoundException to a NoClassDefFoundError.
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005116 StackHandleScope<1> hs(self);
Nicolas Geoffray14691c52015-03-05 10:40:17 +00005117 Handle<mirror::Throwable> cause(hs.NewHandle(self->GetException()));
Ian Rogers62d6c772013-02-27 08:32:07 -08005118 if (cause->InstanceOf(GetClassRoot(kJavaLangClassNotFoundException))) {
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005119 DCHECK(resolved == nullptr); // No Handle needed to preserve resolved.
Ian Rogers98379392014-02-24 16:53:16 -08005120 self->ClearException();
jeffhao8cd6dda2012-02-22 10:15:34 -08005121 ThrowNoClassDefFoundError("Failed resolution of: %s", descriptor);
Nicolas Geoffray14691c52015-03-05 10:40:17 +00005122 self->GetException()->SetCause(cause.Get());
jeffhao8cd6dda2012-02-22 10:15:34 -08005123 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07005124 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005125 }
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005126 DCHECK((resolved == nullptr) || resolved->IsResolved() || resolved->IsErroneous())
Brian Carlstromabcf7ae2013-09-23 22:19:52 -07005127 << PrettyDescriptor(resolved) << " " << resolved->GetStatus();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005128 return resolved;
5129}
5130
Mathieu Chartier0cd81352014-05-22 16:48:55 -07005131mirror::ArtMethod* ClassLinker::ResolveMethod(const DexFile& dex_file, uint32_t method_idx,
Andreas Gampe5a4b8a22014-09-11 08:30:08 -07005132 Handle<mirror::DexCache> dex_cache,
5133 Handle<mirror::ClassLoader> class_loader,
5134 Handle<mirror::ArtMethod> referrer,
Ian Rogersd91d6d62013-09-25 20:26:14 -07005135 InvokeType type) {
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005136 DCHECK(dex_cache.Get() != nullptr);
Ian Rogers08f753d2012-08-24 14:35:25 -07005137 // Check for hit in the dex cache.
Brian Carlstromea46f952013-07-30 01:26:50 -07005138 mirror::ArtMethod* resolved = dex_cache->GetResolvedMethod(method_idx);
Mathieu Chartier0cd81352014-05-22 16:48:55 -07005139 if (resolved != nullptr && !resolved->IsRuntimeMethod()) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005140 return resolved;
5141 }
Ian Rogers08f753d2012-08-24 14:35:25 -07005142 // Fail, get the declaring class.
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005143 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005144 mirror::Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader);
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005145 if (klass == nullptr) {
Elliott Hughescc5f9a92011-09-28 19:17:29 -07005146 DCHECK(Thread::Current()->IsExceptionPending());
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005147 return nullptr;
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005148 }
Ian Rogers08f753d2012-08-24 14:35:25 -07005149 // Scan using method_idx, this saves string compares but will only hit for matching dex
5150 // caches/files.
5151 switch (type) {
5152 case kDirect: // Fall-through.
5153 case kStatic:
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005154 resolved = klass->FindDirectMethod(dex_cache.Get(), method_idx);
Ian Rogers08f753d2012-08-24 14:35:25 -07005155 break;
5156 case kInterface:
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005157 resolved = klass->FindInterfaceMethod(dex_cache.Get(), method_idx);
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005158 DCHECK(resolved == nullptr || resolved->GetDeclaringClass()->IsInterface());
Ian Rogers08f753d2012-08-24 14:35:25 -07005159 break;
5160 case kSuper: // Fall-through.
5161 case kVirtual:
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005162 resolved = klass->FindVirtualMethod(dex_cache.Get(), method_idx);
Ian Rogers08f753d2012-08-24 14:35:25 -07005163 break;
5164 default:
5165 LOG(FATAL) << "Unreachable - invocation type: " << type;
Ian Rogers2c4257b2014-10-24 14:20:06 -07005166 UNREACHABLE();
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07005167 }
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005168 if (resolved == nullptr) {
Ian Rogers08f753d2012-08-24 14:35:25 -07005169 // Search by name, which works across dex files.
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005170 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
Ian Rogersd91d6d62013-09-25 20:26:14 -07005171 const Signature signature = dex_file.GetMethodSignature(method_id);
Ian Rogers08f753d2012-08-24 14:35:25 -07005172 switch (type) {
5173 case kDirect: // Fall-through.
5174 case kStatic:
jeffhao8cd6dda2012-02-22 10:15:34 -08005175 resolved = klass->FindDirectMethod(name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07005176 break;
5177 case kInterface:
5178 resolved = klass->FindInterfaceMethod(name, signature);
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005179 DCHECK(resolved == nullptr || resolved->GetDeclaringClass()->IsInterface());
Ian Rogers08f753d2012-08-24 14:35:25 -07005180 break;
5181 case kSuper: // Fall-through.
5182 case kVirtual:
5183 resolved = klass->FindVirtualMethod(name, signature);
5184 break;
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005185 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005186 }
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005187 // If we found a method, check for incompatible class changes.
5188 if (LIKELY(resolved != nullptr && !resolved->CheckIncompatibleClassChange(type))) {
Ian Rogers08f753d2012-08-24 14:35:25 -07005189 // Be a good citizen and update the dex cache to speed subsequent calls.
5190 dex_cache->SetResolvedMethod(method_idx, resolved);
5191 return resolved;
5192 } else {
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005193 // If we had a method, it's an incompatible-class-change error.
5194 if (resolved != nullptr) {
5195 ThrowIncompatibleClassChangeError(type, resolved->GetInvokeType(), resolved, referrer.Get());
5196 } else {
5197 // We failed to find the method which means either an access error, an incompatible class
5198 // change, or no such method. First try to find the method among direct and virtual methods.
5199 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
5200 const Signature signature = dex_file.GetMethodSignature(method_id);
5201 switch (type) {
5202 case kDirect:
5203 case kStatic:
Ian Rogers08f753d2012-08-24 14:35:25 -07005204 resolved = klass->FindVirtualMethod(name, signature);
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005205 // Note: kDirect and kStatic are also mutually exclusive, but in that case we would
5206 // have had a resolved method before, which triggers the "true" branch above.
5207 break;
5208 case kInterface:
5209 case kVirtual:
5210 case kSuper:
5211 resolved = klass->FindDirectMethod(name, signature);
5212 break;
5213 }
5214
5215 // If we found something, check that it can be accessed by the referrer.
Ian Rogerse0a02da2014-12-02 14:10:53 -08005216 bool exception_generated = false;
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005217 if (resolved != nullptr && referrer.Get() != nullptr) {
5218 mirror::Class* methods_class = resolved->GetDeclaringClass();
5219 mirror::Class* referring_class = referrer->GetDeclaringClass();
5220 if (!referring_class->CanAccess(methods_class)) {
5221 ThrowIllegalAccessErrorClassForMethodDispatch(referring_class, methods_class,
5222 resolved, type);
Ian Rogerse0a02da2014-12-02 14:10:53 -08005223 exception_generated = true;
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005224 } else if (!referring_class->CanAccessMember(methods_class,
5225 resolved->GetAccessFlags())) {
5226 ThrowIllegalAccessErrorMethod(referring_class, resolved);
Ian Rogerse0a02da2014-12-02 14:10:53 -08005227 exception_generated = true;
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005228 }
5229 }
Ian Rogerse0a02da2014-12-02 14:10:53 -08005230 if (!exception_generated) {
5231 // Otherwise, throw an IncompatibleClassChangeError if we found something, and check
5232 // interface methods and throw if we find the method there. If we find nothing, throw a
5233 // NoSuchMethodError.
5234 switch (type) {
5235 case kDirect:
5236 case kStatic:
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005237 if (resolved != nullptr) {
5238 ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer.Get());
5239 } else {
Ian Rogerse0a02da2014-12-02 14:10:53 -08005240 resolved = klass->FindInterfaceMethod(name, signature);
5241 if (resolved != nullptr) {
5242 ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer.Get());
5243 } else {
5244 ThrowNoSuchMethodError(type, klass, name, signature);
5245 }
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005246 }
Ian Rogerse0a02da2014-12-02 14:10:53 -08005247 break;
5248 case kInterface:
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005249 if (resolved != nullptr) {
Ian Rogerse0a02da2014-12-02 14:10:53 -08005250 ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get());
5251 } else {
5252 resolved = klass->FindVirtualMethod(name, signature);
5253 if (resolved != nullptr) {
5254 ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer.Get());
5255 } else {
5256 ThrowNoSuchMethodError(type, klass, name, signature);
5257 }
5258 }
5259 break;
5260 case kSuper:
5261 if (resolved != nullptr) {
5262 ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get());
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005263 } else {
5264 ThrowNoSuchMethodError(type, klass, name, signature);
5265 }
Ian Rogerse0a02da2014-12-02 14:10:53 -08005266 break;
5267 case kVirtual:
5268 if (resolved != nullptr) {
5269 ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get());
5270 } else {
5271 resolved = klass->FindInterfaceMethod(name, signature);
5272 if (resolved != nullptr) {
5273 ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer.Get());
5274 } else {
5275 ThrowNoSuchMethodError(type, klass, name, signature);
5276 }
5277 }
5278 break;
5279 }
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005280 }
Ian Rogers08f753d2012-08-24 14:35:25 -07005281 }
Ian Rogerse0a02da2014-12-02 14:10:53 -08005282 Thread::Current()->AssertPendingException();
Andreas Gampeeff0f5d2014-08-13 21:49:37 -07005283 return nullptr;
Ian Rogers08f753d2012-08-24 14:35:25 -07005284 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005285}
5286
Mathieu Chartierc7853442015-03-27 14:35:38 -07005287ArtField* ClassLinker::ResolveField(const DexFile& dex_file, uint32_t field_idx,
5288 Handle<mirror::DexCache> dex_cache,
5289 Handle<mirror::ClassLoader> class_loader, bool is_static) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005290 DCHECK(dex_cache.Get() != nullptr);
Mathieu Chartierc7853442015-03-27 14:35:38 -07005291 ArtField* resolved = dex_cache->GetResolvedField(field_idx, image_pointer_size_);
Andreas Gampe58a5af82014-07-31 16:23:49 -07005292 if (resolved != nullptr) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005293 return resolved;
5294 }
5295 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
Mathieu Chartierf8322842014-05-16 10:59:25 -07005296 Thread* const self = Thread::Current();
5297 StackHandleScope<1> hs(self);
5298 Handle<mirror::Class> klass(
5299 hs.NewHandle(ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader)));
Andreas Gampe58a5af82014-07-31 16:23:49 -07005300 if (klass.Get() == nullptr) {
Ian Rogers9f1ab122011-12-12 08:52:43 -08005301 DCHECK(Thread::Current()->IsExceptionPending());
Andreas Gampe58a5af82014-07-31 16:23:49 -07005302 return nullptr;
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005303 }
5304
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07005305 if (is_static) {
Mathieu Chartierf8322842014-05-16 10:59:25 -07005306 resolved = mirror::Class::FindStaticField(self, klass, dex_cache.Get(), field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07005307 } else {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005308 resolved = klass->FindInstanceField(dex_cache.Get(), field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07005309 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005310
Andreas Gampe58a5af82014-07-31 16:23:49 -07005311 if (resolved == nullptr) {
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005312 const char* name = dex_file.GetFieldName(field_id);
5313 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
5314 if (is_static) {
Mathieu Chartierf8322842014-05-16 10:59:25 -07005315 resolved = mirror::Class::FindStaticField(self, klass, name, type);
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005316 } else {
5317 resolved = klass->FindInstanceField(name, type);
5318 }
Andreas Gampe58a5af82014-07-31 16:23:49 -07005319 if (resolved == nullptr) {
Mathieu Chartierf8322842014-05-16 10:59:25 -07005320 ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass.Get(), type, name);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005321 return nullptr;
Ian Rogers7b0c5b42012-02-16 15:29:07 -08005322 }
Ian Rogersb067ac22011-12-13 18:05:09 -08005323 }
Mathieu Chartierc7853442015-03-27 14:35:38 -07005324 dex_cache->SetResolvedField(field_idx, resolved, image_pointer_size_);
Ian Rogersb067ac22011-12-13 18:05:09 -08005325 return resolved;
5326}
5327
Mathieu Chartierc7853442015-03-27 14:35:38 -07005328ArtField* ClassLinker::ResolveFieldJLS(const DexFile& dex_file, uint32_t field_idx,
5329 Handle<mirror::DexCache> dex_cache,
5330 Handle<mirror::ClassLoader> class_loader) {
Mathieu Chartiereb8167a2014-05-07 15:43:14 -07005331 DCHECK(dex_cache.Get() != nullptr);
Mathieu Chartierc7853442015-03-27 14:35:38 -07005332 ArtField* resolved = dex_cache->GetResolvedField(field_idx, image_pointer_size_);
Andreas Gampe58a5af82014-07-31 16:23:49 -07005333 if (resolved != nullptr) {
Ian Rogersb067ac22011-12-13 18:05:09 -08005334 return resolved;
5335 }
5336 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
Mathieu Chartierf8322842014-05-16 10:59:25 -07005337 Thread* self = Thread::Current();
5338 StackHandleScope<1> hs(self);
5339 Handle<mirror::Class> klass(
5340 hs.NewHandle(ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader)));
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005341 if (klass.Get() == nullptr) {
Ian Rogersb067ac22011-12-13 18:05:09 -08005342 DCHECK(Thread::Current()->IsExceptionPending());
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005343 return nullptr;
Ian Rogersb067ac22011-12-13 18:05:09 -08005344 }
5345
Ian Rogersdfb325e2013-10-30 01:00:44 -07005346 StringPiece name(dex_file.StringDataByIdx(field_id.name_idx_));
5347 StringPiece type(dex_file.StringDataByIdx(
Ian Rogersfc0e94b2013-09-23 23:51:32 -07005348 dex_file.GetTypeId(field_id.type_idx_).descriptor_idx_));
Mathieu Chartierf8322842014-05-16 10:59:25 -07005349 resolved = mirror::Class::FindField(self, klass, name, type);
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005350 if (resolved != nullptr) {
Mathieu Chartierc7853442015-03-27 14:35:38 -07005351 dex_cache->SetResolvedField(field_idx, resolved, image_pointer_size_);
Ian Rogersb067ac22011-12-13 18:05:09 -08005352 } else {
Mathieu Chartierf8322842014-05-16 10:59:25 -07005353 ThrowNoSuchFieldError("", klass.Get(), type, name);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07005354 }
5355 return resolved;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07005356}
5357
Brian Carlstromea46f952013-07-30 01:26:50 -07005358const char* ClassLinker::MethodShorty(uint32_t method_idx, mirror::ArtMethod* referrer,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005359 uint32_t* length) {
5360 mirror::Class* declaring_class = referrer->GetDeclaringClass();
5361 mirror::DexCache* dex_cache = declaring_class->GetDexCache();
Ian Rogers4445a7e2012-10-05 17:19:13 -07005362 const DexFile& dex_file = *dex_cache->GetDexFile();
Ian Rogersad25ac52011-10-04 19:13:33 -07005363 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Ian Rogers19846512012-02-24 11:42:47 -08005364 return dex_file.GetMethodShorty(method_id, length);
Ian Rogersad25ac52011-10-04 19:13:33 -07005365}
5366
Ian Rogers7dfb28c2013-08-22 08:18:36 -07005367void ClassLinker::DumpAllClasses(int flags) {
5368 if (dex_cache_image_class_lookup_required_) {
5369 MoveImageClassesToClassTable();
5370 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07005371 // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker
5372 // lock held, because it might need to resolve a field's type, which would try to take the lock.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005373 std::vector<mirror::Class*> all_classes;
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07005374 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07005375 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005376 for (GcRoot<mirror::Class>& it : class_table_) {
5377 all_classes.push_back(it.Read());
Ian Rogers5d76c432011-10-31 21:42:49 -07005378 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07005379 }
5380
5381 for (size_t i = 0; i < all_classes.size(); ++i) {
5382 all_classes[i]->DumpClass(std::cerr, flags);
5383 }
5384}
5385
Elliott Hughes956af0f2014-12-11 14:34:28 -08005386static OatFile::OatMethod CreateOatMethod(const void* code) {
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005387 CHECK(code != nullptr);
Mathieu Chartier957ca1c2014-11-21 16:51:29 -08005388 const uint8_t* base = reinterpret_cast<const uint8_t*>(code); // Base of data points at code.
5389 base -= sizeof(void*); // Move backward so that code_offset != 0.
5390 const uint32_t code_offset = sizeof(void*);
5391 return OatFile::OatMethod(base, code_offset);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005392}
5393
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005394bool ClassLinker::IsQuickResolutionStub(const void* entry_point) const {
5395 return (entry_point == GetQuickResolutionStub()) ||
5396 (quick_resolution_trampoline_ == entry_point);
5397}
5398
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005399bool ClassLinker::IsQuickToInterpreterBridge(const void* entry_point) const {
5400 return (entry_point == GetQuickToInterpreterBridge()) ||
5401 (quick_to_interpreter_bridge_trampoline_ == entry_point);
5402}
5403
5404bool ClassLinker::IsQuickGenericJniStub(const void* entry_point) const {
5405 return (entry_point == GetQuickGenericJniStub()) ||
5406 (quick_generic_jni_trampoline_ == entry_point);
5407}
5408
5409const void* ClassLinker::GetRuntimeQuickGenericJniStub() const {
5410 return GetQuickGenericJniStub();
5411}
5412
Elliott Hughes956af0f2014-12-11 14:34:28 -08005413void ClassLinker::SetEntryPointsToCompiledCode(mirror::ArtMethod* method,
5414 const void* method_code) const {
5415 OatFile::OatMethod oat_method = CreateOatMethod(method_code);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005416 oat_method.LinkMethod(method);
5417 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005418}
5419
5420void ClassLinker::SetEntryPointsToInterpreter(mirror::ArtMethod* method) const {
5421 if (!method->IsNative()) {
5422 method->SetEntryPointFromInterpreter(artInterpreterToInterpreterBridge);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005423 method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge());
5424 } else {
5425 const void* quick_method_code = GetQuickGenericJniStub();
Elliott Hughes956af0f2014-12-11 14:34:28 -08005426 OatFile::OatMethod oat_method = CreateOatMethod(quick_method_code);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005427 oat_method.LinkMethod(method);
5428 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005429 }
5430}
5431
Ian Rogers7dfb28c2013-08-22 08:18:36 -07005432void ClassLinker::DumpForSigQuit(std::ostream& os) {
Ian Rogers7b078e82014-09-10 14:44:24 -07005433 Thread* self = Thread::Current();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07005434 if (dex_cache_image_class_lookup_required_) {
Ian Rogers7b078e82014-09-10 14:44:24 -07005435 ScopedObjectAccess soa(self);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07005436 MoveImageClassesToClassTable();
5437 }
Ian Rogers7b078e82014-09-10 14:44:24 -07005438 ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005439 os << "Zygote loaded classes=" << pre_zygote_class_table_.Size() << " post zygote classes="
5440 << class_table_.Size() << "\n";
Elliott Hughescac6cc72011-11-03 20:31:21 -07005441}
5442
Ian Rogers7dfb28c2013-08-22 08:18:36 -07005443size_t ClassLinker::NumLoadedClasses() {
5444 if (dex_cache_image_class_lookup_required_) {
5445 MoveImageClassesToClassTable();
5446 }
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07005447 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005448 // Only return non zygote classes since these are the ones which apps which care about.
5449 return class_table_.Size();
Elliott Hughese27955c2011-08-26 15:21:24 -07005450}
5451
Brian Carlstrom47d237a2011-10-18 15:08:33 -07005452pid_t ClassLinker::GetClassesLockOwner() {
Ian Rogersb726dcb2012-09-05 08:57:23 -07005453 return Locks::classlinker_classes_lock_->GetExclusiveOwnerTid();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07005454}
5455
5456pid_t ClassLinker::GetDexLockOwner() {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07005457 return dex_lock_.GetExclusiveOwnerTid();
Brian Carlstrom24a3c2e2011-10-17 18:07:52 -07005458}
5459
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08005460void ClassLinker::SetClassRoot(ClassRoot class_root, mirror::Class* klass) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08005461 DCHECK(!init_done_);
5462
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005463 DCHECK(klass != nullptr);
5464 DCHECK(klass->GetClassLoader() == nullptr);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08005465
Hiroshi Yamauchi94f7b492014-07-22 18:08:23 -07005466 mirror::ObjectArray<mirror::Class>* class_roots = class_roots_.Read();
Andreas Gampe2ed8def2014-08-28 14:41:02 -07005467 DCHECK(class_roots != nullptr);
5468 DCHECK(class_roots->Get(class_root) == nullptr);
Hiroshi Yamauchie9e3e692014-06-24 14:31:37 -07005469 class_roots->Set<false>(class_root, klass);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08005470}
5471
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005472const char* ClassLinker::GetClassRootDescriptor(ClassRoot class_root) {
5473 static const char* class_roots_descriptors[] = {
5474 "Ljava/lang/Class;",
5475 "Ljava/lang/Object;",
5476 "[Ljava/lang/Class;",
5477 "[Ljava/lang/Object;",
5478 "Ljava/lang/String;",
5479 "Ljava/lang/DexCache;",
5480 "Ljava/lang/ref/Reference;",
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005481 "Ljava/lang/reflect/ArtMethod;",
Mathieu Chartierfc58af42015-04-16 18:00:39 -07005482 "Ljava/lang/reflect/Constructor;",
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07005483 "Ljava/lang/reflect/Field;",
Mathieu Chartierfc58af42015-04-16 18:00:39 -07005484 "Ljava/lang/reflect/Method;",
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005485 "Ljava/lang/reflect/Proxy;",
5486 "[Ljava/lang/String;",
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005487 "[Ljava/lang/reflect/ArtMethod;",
Mathieu Chartierfc58af42015-04-16 18:00:39 -07005488 "[Ljava/lang/reflect/Constructor;",
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07005489 "[Ljava/lang/reflect/Field;",
Mathieu Chartierfc58af42015-04-16 18:00:39 -07005490 "[Ljava/lang/reflect/Method;",
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005491 "Ljava/lang/ClassLoader;",
5492 "Ljava/lang/Throwable;",
5493 "Ljava/lang/ClassNotFoundException;",
5494 "Ljava/lang/StackTraceElement;",
5495 "Z",
5496 "B",
5497 "C",
5498 "D",
5499 "F",
5500 "I",
5501 "J",
5502 "S",
5503 "V",
5504 "[Z",
5505 "[B",
5506 "[C",
5507 "[D",
5508 "[F",
5509 "[I",
5510 "[J",
5511 "[S",
5512 "[Ljava/lang/StackTraceElement;",
5513 };
Andreas Gampe575e78c2014-11-03 23:41:03 -08005514 static_assert(arraysize(class_roots_descriptors) == size_t(kClassRootsMax),
5515 "Mismatch between class descriptors and class-root enum");
Ian Rogers6f3dbba2014-10-14 17:41:57 -07005516
5517 const char* descriptor = class_roots_descriptors[class_root];
5518 CHECK(descriptor != nullptr);
5519 return descriptor;
5520}
5521
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005522std::size_t ClassLinker::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& root)
5523 const {
5524 std::string temp;
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08005525 return ComputeModifiedUtf8Hash(root.Read()->GetDescriptor(&temp));
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005526}
5527
5528bool ClassLinker::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& a,
Mathieu Chartier47f867a2015-03-18 10:39:00 -07005529 const GcRoot<mirror::Class>& b) const {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005530 if (a.Read()->GetClassLoader() != b.Read()->GetClassLoader()) {
5531 return false;
5532 }
5533 std::string temp;
5534 return a.Read()->DescriptorEquals(b.Read()->GetDescriptor(&temp));
5535}
5536
5537std::size_t ClassLinker::ClassDescriptorHashEquals::operator()(
5538 const std::pair<const char*, mirror::ClassLoader*>& element) const {
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08005539 return ComputeModifiedUtf8Hash(element.first);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005540}
5541
5542bool ClassLinker::ClassDescriptorHashEquals::operator()(
Mathieu Chartier47f867a2015-03-18 10:39:00 -07005543 const GcRoot<mirror::Class>& a, const std::pair<const char*, mirror::ClassLoader*>& b) const {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005544 if (a.Read()->GetClassLoader() != b.second) {
5545 return false;
5546 }
5547 return a.Read()->DescriptorEquals(b.first);
5548}
5549
5550bool ClassLinker::ClassDescriptorHashEquals::operator()(const GcRoot<mirror::Class>& a,
Mathieu Chartier47f867a2015-03-18 10:39:00 -07005551 const char* descriptor) const {
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005552 return a.Read()->DescriptorEquals(descriptor);
5553}
5554
5555std::size_t ClassLinker::ClassDescriptorHashEquals::operator()(const char* descriptor) const {
Mathieu Chartiere7c9a8c2014-11-06 16:35:45 -08005556 return ComputeModifiedUtf8Hash(descriptor);
Mathieu Chartierc2e20622014-11-03 11:41:47 -08005557}
5558
Sebastien Hertz6963e442014-11-26 22:11:27 +01005559bool ClassLinker::MayBeCalledWithDirectCodePointer(mirror::ArtMethod* m) {
Mathieu Chartierd8565452015-03-26 09:41:50 -07005560 if (Runtime::Current()->UseJit()) {
5561 // JIT can have direct code pointers from any method to any other method.
5562 return true;
5563 }
Sebastien Hertz6963e442014-11-26 22:11:27 +01005564 // Non-image methods don't use direct code pointer.
5565 if (!m->GetDeclaringClass()->IsBootStrapClassLoaded()) {
5566 return false;
5567 }
5568 if (m->IsPrivate()) {
5569 // The method can only be called inside its own oat file. Therefore it won't be called using
5570 // its direct code if the oat file has been compiled in PIC mode.
Sebastien Hertz6963e442014-11-26 22:11:27 +01005571 const DexFile& dex_file = m->GetDeclaringClass()->GetDexFile();
Richard Uhler07b3c232015-03-31 15:57:54 -07005572 const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
Sebastien Hertz6963e442014-11-26 22:11:27 +01005573 if (oat_dex_file == nullptr) {
5574 // No oat file: the method has not been compiled.
5575 return false;
5576 }
5577 const OatFile* oat_file = oat_dex_file->GetOatFile();
5578 return oat_file != nullptr && !oat_file->IsPic();
5579 } else {
5580 // The method can be called outside its own oat file. Therefore it won't be called using its
5581 // direct code pointer only if all loaded oat files have been compiled in PIC mode.
5582 ReaderMutexLock mu(Thread::Current(), dex_lock_);
5583 for (const OatFile* oat_file : oat_files_) {
5584 if (!oat_file->IsPic()) {
5585 return true;
5586 }
5587 }
5588 return false;
5589 }
5590}
5591
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005592jobject ClassLinker::CreatePathClassLoader(Thread* self, std::vector<const DexFile*>& dex_files) {
5593 // SOAAlreadyRunnable is protected, and we need something to add a global reference.
5594 // We could move the jobject to the callers, but all call-sites do this...
5595 ScopedObjectAccessUnchecked soa(self);
5596
5597 // Register the dex files.
5598 for (const DexFile* dex_file : dex_files) {
5599 RegisterDexFile(*dex_file);
5600 }
5601
5602 // For now, create a libcore-level DexFile for each ART DexFile. This "explodes" multidex.
Mathieu Chartierc7853442015-03-27 14:35:38 -07005603 StackHandleScope<10> hs(self);
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005604
Mathieu Chartierc7853442015-03-27 14:35:38 -07005605 ArtField* dex_elements_field =
5606 soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList_dexElements);
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005607
Mathieu Chartierc7853442015-03-27 14:35:38 -07005608 mirror::Class* dex_elements_class = dex_elements_field->GetType<true>();
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005609 DCHECK(dex_elements_class != nullptr);
5610 DCHECK(dex_elements_class->IsArrayClass());
Mathieu Chartierdaaf3262015-03-24 13:30:28 -07005611 Handle<mirror::ObjectArray<mirror::Object>> h_dex_elements(hs.NewHandle(
5612 mirror::ObjectArray<mirror::Object>::Alloc(self, dex_elements_class, dex_files.size())));
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005613 Handle<mirror::Class> h_dex_element_class =
5614 hs.NewHandle(dex_elements_class->GetComponentType());
5615
Mathieu Chartierc7853442015-03-27 14:35:38 -07005616 ArtField* element_file_field =
5617 soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
5618 DCHECK_EQ(h_dex_element_class.Get(), element_file_field->GetDeclaringClass());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005619
Mathieu Chartierc7853442015-03-27 14:35:38 -07005620 ArtField* cookie_field = soa.DecodeField(WellKnownClasses::dalvik_system_DexFile_cookie);
5621 DCHECK_EQ(cookie_field->GetDeclaringClass(), element_file_field->GetType<false>());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005622
5623 // Fill the elements array.
5624 int32_t index = 0;
5625 for (const DexFile* dex_file : dex_files) {
5626 StackHandleScope<3> hs2(self);
5627
5628 Handle<mirror::LongArray> h_long_array = hs2.NewHandle(mirror::LongArray::Alloc(self, 1));
5629 DCHECK(h_long_array.Get() != nullptr);
5630 h_long_array->Set(0, reinterpret_cast<intptr_t>(dex_file));
5631
5632 Handle<mirror::Object> h_dex_file = hs2.NewHandle(
Mathieu Chartierc7853442015-03-27 14:35:38 -07005633 cookie_field->GetDeclaringClass()->AllocObject(self));
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005634 DCHECK(h_dex_file.Get() != nullptr);
Mathieu Chartierc7853442015-03-27 14:35:38 -07005635 cookie_field->SetObject<false>(h_dex_file.Get(), h_long_array.Get());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005636
5637 Handle<mirror::Object> h_element = hs2.NewHandle(h_dex_element_class->AllocObject(self));
5638 DCHECK(h_element.Get() != nullptr);
Mathieu Chartierc7853442015-03-27 14:35:38 -07005639 element_file_field->SetObject<false>(h_element.Get(), h_dex_file.Get());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005640
5641 h_dex_elements->Set(index, h_element.Get());
5642 index++;
5643 }
5644 DCHECK_EQ(index, h_dex_elements->GetLength());
5645
5646 // Create DexPathList.
5647 Handle<mirror::Object> h_dex_path_list = hs.NewHandle(
Mathieu Chartierc7853442015-03-27 14:35:38 -07005648 dex_elements_field->GetDeclaringClass()->AllocObject(self));
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005649 DCHECK(h_dex_path_list.Get() != nullptr);
5650 // Set elements.
Mathieu Chartierc7853442015-03-27 14:35:38 -07005651 dex_elements_field->SetObject<false>(h_dex_path_list.Get(), h_dex_elements.Get());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005652
5653 // Create PathClassLoader.
5654 Handle<mirror::Class> h_path_class_class = hs.NewHandle(
5655 soa.Decode<mirror::Class*>(WellKnownClasses::dalvik_system_PathClassLoader));
5656 Handle<mirror::Object> h_path_class_loader = hs.NewHandle(
5657 h_path_class_class->AllocObject(self));
5658 DCHECK(h_path_class_loader.Get() != nullptr);
5659 // Set DexPathList.
Mathieu Chartierc7853442015-03-27 14:35:38 -07005660 ArtField* path_list_field =
5661 soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList);
5662 DCHECK(path_list_field != nullptr);
5663 path_list_field->SetObject<false>(h_path_class_loader.Get(), h_dex_path_list.Get());
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005664
5665 // Make a pretend boot-classpath.
5666 // TODO: Should we scan the image?
Mathieu Chartierc7853442015-03-27 14:35:38 -07005667 ArtField* const parent_field =
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005668 mirror::Class::FindField(self, hs.NewHandle(h_path_class_loader->GetClass()), "parent",
Mathieu Chartierc7853442015-03-27 14:35:38 -07005669 "Ljava/lang/ClassLoader;");
Roland Levillainf39c9eb2015-05-26 15:02:07 +01005670 DCHECK(parent_field != nullptr);
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005671 mirror::Object* boot_cl =
5672 soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_BootClassLoader)->AllocObject(self);
Mathieu Chartierc7853442015-03-27 14:35:38 -07005673 parent_field->SetObject<false>(h_path_class_loader.Get(), boot_cl);
Andreas Gampe81c6f8d2015-03-25 17:19:53 -07005674
5675 // Make it a global ref and return.
5676 ScopedLocalRef<jobject> local_ref(
5677 soa.Env(), soa.Env()->AddLocalReference<jobject>(h_path_class_loader.Get()));
5678 return soa.Env()->NewGlobalRef(local_ref.get());
5679}
5680
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07005681} // namespace art