blob: fbb47bdfaeedb1f7c3f15823c5c4f9a52f9e9ea1 [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 Carlstromd601af82012-01-06 10:15:19 -080019#include <fcntl.h>
20#include <sys/file.h>
21#include <sys/stat.h>
Brian Carlstromdbf05b72011-12-15 00:55:24 -080022#include <sys/types.h>
23#include <sys/wait.h>
24
Brian Carlstromdbc05252011-09-09 01:59:59 -070025#include <deque>
Ian Rogers0cfe1fb2011-08-26 03:29:44 -070026#include <string>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070027#include <utility>
Elliott Hughes90a33692011-08-30 13:27:07 -070028#include <vector>
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070029
Elliott Hughes1aa246d2012-12-13 09:29:36 -080030#include "base/casts.h"
Elliott Hughes07ed66b2012-12-12 18:34:25 -080031#include "base/logging.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"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080034#include "class_linker-inl.h"
Vladimir Marko2b5eaa22013-12-13 13:59:30 +000035#include "compiler_callbacks.h"
Elliott Hughes4740cdf2011-12-07 14:07:12 -080036#include "debugger.h"
Ian Rogers4f6ad8a2013-03-18 15:27:28 -070037#include "dex_file-inl.h"
Ian Rogers1d54e732013-05-02 21:10:01 -070038#include "gc/accounting/card_table-inl.h"
39#include "gc/accounting/heap_bitmap.h"
40#include "gc/heap.h"
41#include "gc/space/image_space.h"
Elliott Hughescf4c6c42011-09-01 15:16:42 -070042#include "intern_table.h"
Ian Rogers64b6d142012-10-29 16:34:15 -070043#include "interpreter/interpreter.h"
Ian Rogers0571d352011-11-03 19:51:38 -070044#include "leb128.h"
Brian Carlstrom700c8d32012-11-05 10:42:02 -080045#include "oat.h"
Brian Carlstrom58ae9412011-10-04 00:56:06 -070046#include "oat_file.h"
Brian Carlstromea46f952013-07-30 01:26:50 -070047#include "mirror/art_field-inl.h"
48#include "mirror/art_method-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080049#include "mirror/class.h"
50#include "mirror/class-inl.h"
51#include "mirror/class_loader.h"
Ian Rogers39ebcb82013-05-30 16:57:23 -070052#include "mirror/dex_cache-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080053#include "mirror/iftable-inl.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080054#include "mirror/object-inl.h"
55#include "mirror/object_array-inl.h"
56#include "mirror/proxy.h"
57#include "mirror/stack_trace_element.h"
Ian Rogers6d4d9fc2011-11-30 16:24:48 -080058#include "object_utils.h"
Brian Carlstrom5b332c82012-02-01 15:02:31 -080059#include "os.h"
Brian Carlstrom1f870082011-08-23 16:02:11 -070060#include "runtime.h"
Ian Rogers7655f292013-07-29 11:07:13 -070061#include "entrypoints/entrypoint_utils.h"
Elliott Hughes4d0207c2011-10-03 19:14:34 -070062#include "ScopedLocalRef.h"
Ian Rogers00f7d0e2012-07-19 15:28:27 -070063#include "scoped_thread_state_change.h"
Ian Rogers1f539342012-10-03 21:09:42 -070064#include "sirt_ref.h"
Brian Carlstrom40381fb2011-10-19 14:13:40 -070065#include "stack_indirect_reference_table.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070066#include "thread.h"
Elliott Hughes54e7df12011-09-16 11:47:04 -070067#include "UniquePtr.h"
Brian Carlstrom578bbdc2011-07-21 14:07:47 -070068#include "utils.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080069#include "verifier/method_verifier.h"
Elliott Hugheseac76672012-05-24 21:56:51 -070070#include "well_known_classes.h"
Carl Shapiro0e5d75d2011-07-06 18:28:37 -070071
72namespace art {
73
Ian Rogers00f7d0e2012-07-19 15:28:27 -070074static void ThrowNoClassDefFoundError(const char* fmt, ...)
75 __attribute__((__format__(__printf__, 1, 2)))
Ian Rogersb726dcb2012-09-05 08:57:23 -070076 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
Elliott Hughes0512f022012-03-15 22:10:52 -070077static void ThrowNoClassDefFoundError(const char* fmt, ...) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -070078 va_list args;
79 va_start(args, fmt);
Ian Rogers62d6c772013-02-27 08:32:07 -080080 Thread* self = Thread::Current();
81 ThrowLocation throw_location = self->GetCurrentLocationForThrow();
82 self->ThrowNewExceptionV(throw_location, "Ljava/lang/NoClassDefFoundError;", fmt, args);
Ian Rogerscab01012012-01-10 17:35:46 -080083 va_end(args);
84}
85
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080086static void ThrowEarlierClassFailure(mirror::Class* c)
Ian Rogersb726dcb2012-09-05 08:57:23 -070087 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Elliott Hughes5c599942012-06-13 16:45:05 -070088 // The class failed to initialize on a previous attempt, so we want to throw
89 // a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we
90 // failed in verification, in which case v2 5.4.1 says we need to re-throw
91 // the previous error.
Ian Rogers87e552d2012-08-31 15:54:48 -070092 if (!Runtime::Current()->IsCompiler()) { // Give info if this occurs at runtime.
93 LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c);
94 }
Elliott Hughes4a2b4172011-09-20 17:08:25 -070095
Elliott Hughes5c599942012-06-13 16:45:05 -070096 CHECK(c->IsErroneous()) << PrettyClass(c) << " " << c->GetStatus();
Ian Rogers62d6c772013-02-27 08:32:07 -080097 Thread* self = Thread::Current();
98 ThrowLocation throw_location = self->GetCurrentLocationForThrow();
Elliott Hughes4a2b4172011-09-20 17:08:25 -070099 if (c->GetVerifyErrorClass() != NULL) {
100 // TODO: change the verifier to store an _instance_, with a useful detail message?
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800101 ClassHelper ve_ch(c->GetVerifyErrorClass());
Ian Rogers62d6c772013-02-27 08:32:07 -0800102 self->ThrowNewException(throw_location, ve_ch.GetDescriptor(), PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700103 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -0800104 self->ThrowNewException(throw_location, "Ljava/lang/NoClassDefFoundError;",
105 PrettyDescriptor(c).c_str());
Elliott Hughes4a2b4172011-09-20 17:08:25 -0700106 }
107}
108
Ian Rogers62d6c772013-02-27 08:32:07 -0800109static void WrapExceptionInInitializer() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Elliott Hughesa4f94742012-05-29 16:28:38 -0700110 Thread* self = Thread::Current();
111 JNIEnv* env = self->GetJniEnv();
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700112
113 ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred());
114 CHECK(cause.get() != NULL);
115
116 env->ExceptionClear();
Elliott Hughesa4f94742012-05-29 16:28:38 -0700117 bool is_error = env->IsInstanceOf(cause.get(), WellKnownClasses::java_lang_Error);
118 env->Throw(cause.get());
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700119
Elliott Hughesa4f94742012-05-29 16:28:38 -0700120 // We only wrap non-Error exceptions; an Error can just be used as-is.
121 if (!is_error) {
Ian Rogers62d6c772013-02-27 08:32:07 -0800122 ThrowLocation throw_location = self->GetCurrentLocationForThrow();
123 self->ThrowNewWrappedException(throw_location, "Ljava/lang/ExceptionInInitializerError;", NULL);
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700124 }
Elliott Hughes4d0207c2011-10-03 19:14:34 -0700125}
126
Elliott Hughesc3b77c72011-12-15 20:56:48 -0800127static size_t Hash(const char* s) {
128 // This is the java.lang.String hashcode for convenience, not interoperability.
129 size_t hash = 0;
130 for (; *s != '\0'; ++s) {
131 hash = hash * 31 + *s;
132 }
133 return hash;
134}
135
Elliott Hughes418d20f2011-09-22 14:00:39 -0700136const char* ClassLinker::class_roots_descriptors_[] = {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700137 "Ljava/lang/Class;",
138 "Ljava/lang/Object;",
Elliott Hughes418d20f2011-09-22 14:00:39 -0700139 "[Ljava/lang/Class;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700140 "[Ljava/lang/Object;",
141 "Ljava/lang/String;",
Mathieu Chartier66f19252012-09-18 08:57:04 -0700142 "Ljava/lang/DexCache;",
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700143 "Ljava/lang/ref/Reference;",
Brian Carlstromea46f952013-07-30 01:26:50 -0700144 "Ljava/lang/reflect/ArtField;",
145 "Ljava/lang/reflect/ArtMethod;",
Ian Rogers466bb252011-10-14 03:29:56 -0700146 "Ljava/lang/reflect/Proxy;",
Mathieu Chartier66f19252012-09-18 08:57:04 -0700147 "[Ljava/lang/String;",
Brian Carlstromea46f952013-07-30 01:26:50 -0700148 "[Ljava/lang/reflect/ArtField;",
149 "[Ljava/lang/reflect/ArtMethod;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700150 "Ljava/lang/ClassLoader;",
Ian Rogers5167c972012-02-03 10:41:20 -0800151 "Ljava/lang/Throwable;",
jeffhao8cd6dda2012-02-22 10:15:34 -0800152 "Ljava/lang/ClassNotFoundException;",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700153 "Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700154 "Z",
155 "B",
156 "C",
157 "D",
158 "F",
159 "I",
160 "J",
161 "S",
162 "V",
163 "[Z",
164 "[B",
165 "[C",
166 "[D",
167 "[F",
168 "[I",
169 "[J",
170 "[S",
Shih-wei Liao55df06b2011-08-26 14:39:27 -0700171 "[Ljava/lang/StackTraceElement;",
Brian Carlstroma663ea52011-08-19 23:33:41 -0700172};
173
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800174ClassLinker::ClassLinker(InternTable* intern_table)
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700175 // dex_lock_ is recursive as it may be used in stack dumping.
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700176 : dex_lock_("ClassLinker dex lock", kDefaultMutexLevel),
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700177 dex_cache_image_class_lookup_required_(false),
178 failed_dex_cache_class_lookups_(0),
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700179 class_roots_(NULL),
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700180 array_iftable_(NULL),
Elliott Hughescf4c6c42011-09-01 15:16:42 -0700181 init_done_(false),
Mathieu Chartierc4621982013-09-16 19:43:47 -0700182 dex_caches_dirty_(false),
183 class_table_dirty_(false),
Jeff Hao0aba0ba2013-06-03 14:49:28 -0700184 intern_table_(intern_table),
185 portable_resolution_trampoline_(NULL),
Jeff Hao88474b42013-10-23 16:24:40 -0700186 quick_resolution_trampoline_(NULL),
187 portable_imt_conflict_trampoline_(NULL),
188 quick_imt_conflict_trampoline_(NULL) {
Elliott Hughes418d20f2011-09-22 14:00:39 -0700189 CHECK_EQ(arraysize(class_roots_descriptors_), size_t(kClassRootsMax));
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -0700190}
Brian Carlstroma663ea52011-08-19 23:33:41 -0700191
Brian Carlstroma004aa92012-02-08 18:05:09 -0800192void ClassLinker::InitFromCompiler(const std::vector<const DexFile*>& boot_class_path) {
193 VLOG(startup) << "ClassLinker::Init";
194 CHECK(Runtime::Current()->IsCompiler());
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700195
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700196 CHECK(!init_done_);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -0700197
Elliott Hughes30646832011-10-13 16:59:46 -0700198 // java_lang_Class comes first, it's needed for AllocClass
Ian Rogers1f539342012-10-03 21:09:42 -0700199 Thread* self = Thread::Current();
Ian Rogers1d54e732013-05-02 21:10:01 -0700200 gc::Heap* heap = Runtime::Current()->GetHeap();
Mathieu Chartier590fee92013-09-13 13:46:47 -0700201 // The GC can't handle an object with a null class since we can't get the size of this object.
202 heap->IncrementDisableGC(self);
Mathieu Chartiercbb2d202013-11-14 17:45:16 -0800203 SirtRef<mirror::Class> java_lang_Class(self, down_cast<mirror::Class*>(
204 heap->AllocNonMovableObject<true>(self, nullptr, sizeof(mirror::ClassClass))));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700205 CHECK(java_lang_Class.get() != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800206 mirror::Class::SetClassClass(java_lang_Class.get());
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700207 java_lang_Class->SetClass(java_lang_Class.get());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800208 java_lang_Class->SetClassSize(sizeof(mirror::ClassClass));
Mathieu Chartier590fee92013-09-13 13:46:47 -0700209 heap->DecrementDisableGC(self);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800210 // AllocClass(mirror::Class*) can now be used
Brian Carlstroma0808032011-07-18 00:39:23 -0700211
Elliott Hughes418d20f2011-09-22 14:00:39 -0700212 // Class[] is used for reflection support.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800213 SirtRef<mirror::Class> class_array_class(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700214 class_array_class->SetComponentType(java_lang_Class.get());
Elliott Hughes418d20f2011-09-22 14:00:39 -0700215
Ian Rogers23435d02012-09-24 11:23:12 -0700216 // java_lang_Object comes next so that object_array_class can be created.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800217 SirtRef<mirror::Class> java_lang_Object(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700218 CHECK(java_lang_Object.get() != NULL);
Ian Rogers23435d02012-09-24 11:23:12 -0700219 // backfill Object as the super class of Class.
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700220 java_lang_Class->SetSuperClass(java_lang_Object.get());
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700221 java_lang_Object->SetStatus(mirror::Class::kStatusLoaded, self);
Brian Carlstroma0808032011-07-18 00:39:23 -0700222
Ian Rogers23435d02012-09-24 11:23:12 -0700223 // Object[] next to hold class roots.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800224 SirtRef<mirror::Class> object_array_class(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700225 object_array_class->SetComponentType(java_lang_Object.get());
Brian Carlstroma0808032011-07-18 00:39:23 -0700226
Ian Rogers23435d02012-09-24 11:23:12 -0700227 // Setup the char class to be used for char[].
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800228 SirtRef<mirror::Class> char_class(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700229
Ian Rogers23435d02012-09-24 11:23:12 -0700230 // Setup the char[] class to be used for String.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800231 SirtRef<mirror::Class> char_array_class(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700232 char_array_class->SetComponentType(char_class.get());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800233 mirror::CharArray::SetArrayClass(char_array_class.get());
Brian Carlstrom9cff8e12011-08-18 16:47:29 -0700234
Ian Rogers23435d02012-09-24 11:23:12 -0700235 // Setup String.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800236 SirtRef<mirror::Class> java_lang_String(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::StringClass)));
237 mirror::String::SetClass(java_lang_String.get());
238 java_lang_String->SetObjectSize(sizeof(mirror::String));
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700239 java_lang_String->SetStatus(mirror::Class::kStatusResolved, self);
Jesse Wilson14150742011-07-29 19:04:44 -0400240
Ian Rogers23435d02012-09-24 11:23:12 -0700241 // Create storage for root classes, save away our work so far (requires descriptors).
Mathieu Chartiercbb2d202013-11-14 17:45:16 -0800242 class_roots_ = mirror::ObjectArray<mirror::Class>::Alloc(self, object_array_class.get(),
243 kClassRootsMax);
Elliott Hughes30646832011-10-13 16:59:46 -0700244 CHECK(class_roots_ != NULL);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700245 SetClassRoot(kJavaLangClass, java_lang_Class.get());
246 SetClassRoot(kJavaLangObject, java_lang_Object.get());
247 SetClassRoot(kClassArrayClass, class_array_class.get());
248 SetClassRoot(kObjectArrayClass, object_array_class.get());
249 SetClassRoot(kCharArrayClass, char_array_class.get());
250 SetClassRoot(kJavaLangString, java_lang_String.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700251
252 // Setup the primitive type classes.
Ian Rogers50b35e22012-10-04 10:09:15 -0700253 SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass(self, Primitive::kPrimBoolean));
254 SetClassRoot(kPrimitiveByte, CreatePrimitiveClass(self, Primitive::kPrimByte));
255 SetClassRoot(kPrimitiveShort, CreatePrimitiveClass(self, Primitive::kPrimShort));
256 SetClassRoot(kPrimitiveInt, CreatePrimitiveClass(self, Primitive::kPrimInt));
257 SetClassRoot(kPrimitiveLong, CreatePrimitiveClass(self, Primitive::kPrimLong));
258 SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass(self, Primitive::kPrimFloat));
259 SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass(self, Primitive::kPrimDouble));
260 SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass(self, Primitive::kPrimVoid));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700261
Ian Rogers23435d02012-09-24 11:23:12 -0700262 // Create array interface entries to populate once we can load system classes.
Ian Rogers50b35e22012-10-04 10:09:15 -0700263 array_iftable_ = AllocIfTable(self, 2);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700264
Ian Rogers23435d02012-09-24 11:23:12 -0700265 // Create int array type for AllocDexCache (done in AppendToBootClassPath).
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800266 SirtRef<mirror::Class> int_array_class(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::Class)));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700267 int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800268 mirror::IntArray::SetArrayClass(int_array_class.get());
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700269 SetClassRoot(kIntArrayClass, int_array_class.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700270
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700271 // now that these are registered, we can use AllocClass() and AllocObjectArray
Brian Carlstroma0808032011-07-18 00:39:23 -0700272
Ian Rogers52813c92012-10-11 11:50:38 -0700273 // Set up DexCache. This cannot be done later since AppendToBootClassPath calls AllocDexCache.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800274 SirtRef<mirror::Class>
275 java_lang_DexCache(self, AllocClass(self, java_lang_Class.get(), sizeof(mirror::DexCacheClass)));
Mathieu Chartier66f19252012-09-18 08:57:04 -0700276 SetClassRoot(kJavaLangDexCache, java_lang_DexCache.get());
Mathieu Chartier79b4f382013-10-23 15:21:37 -0700277 java_lang_DexCache->SetObjectSize(sizeof(mirror::DexCache));
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700278 java_lang_DexCache->SetStatus(mirror::Class::kStatusResolved, self);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700279
Mathieu Chartier66f19252012-09-18 08:57:04 -0700280 // Constructor, Field, Method, and AbstractMethod are necessary so that FindClass can link members.
Brian Carlstromea46f952013-07-30 01:26:50 -0700281 SirtRef<mirror::Class> java_lang_reflect_ArtField(self, AllocClass(self, java_lang_Class.get(),
282 sizeof(mirror::ArtFieldClass)));
283 CHECK(java_lang_reflect_ArtField.get() != NULL);
284 java_lang_reflect_ArtField->SetObjectSize(sizeof(mirror::ArtField));
285 SetClassRoot(kJavaLangReflectArtField, java_lang_reflect_ArtField.get());
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700286 java_lang_reflect_ArtField->SetStatus(mirror::Class::kStatusResolved, self);
Brian Carlstromea46f952013-07-30 01:26:50 -0700287 mirror::ArtField::SetClass(java_lang_reflect_ArtField.get());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700288
Brian Carlstromea46f952013-07-30 01:26:50 -0700289 SirtRef<mirror::Class> java_lang_reflect_ArtMethod(self, AllocClass(self, java_lang_Class.get(),
290 sizeof(mirror::ArtMethodClass)));
291 CHECK(java_lang_reflect_ArtMethod.get() != NULL);
292 java_lang_reflect_ArtMethod->SetObjectSize(sizeof(mirror::ArtMethod));
293 SetClassRoot(kJavaLangReflectArtMethod, java_lang_reflect_ArtMethod.get());
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700294 java_lang_reflect_ArtMethod->SetStatus(mirror::Class::kStatusResolved, self);
Ian Rogers4445a7e2012-10-05 17:19:13 -0700295
Brian Carlstromea46f952013-07-30 01:26:50 -0700296 mirror::ArtMethod::SetClass(java_lang_reflect_ArtMethod.get());
Mathieu Chartier66f19252012-09-18 08:57:04 -0700297
298 // Set up array classes for string, field, method
Brian Carlstromea46f952013-07-30 01:26:50 -0700299 SirtRef<mirror::Class> object_array_string(self, AllocClass(self, java_lang_Class.get(),
300 sizeof(mirror::Class)));
Mathieu Chartier66f19252012-09-18 08:57:04 -0700301 object_array_string->SetComponentType(java_lang_String.get());
302 SetClassRoot(kJavaLangStringArrayClass, object_array_string.get());
303
Brian Carlstromea46f952013-07-30 01:26:50 -0700304 SirtRef<mirror::Class> object_array_art_method(self, AllocClass(self, java_lang_Class.get(),
305 sizeof(mirror::Class)));
306 object_array_art_method->SetComponentType(java_lang_reflect_ArtMethod.get());
307 SetClassRoot(kJavaLangReflectArtMethodArrayClass, object_array_art_method.get());
Ian Rogers4445a7e2012-10-05 17:19:13 -0700308
Brian Carlstromea46f952013-07-30 01:26:50 -0700309 SirtRef<mirror::Class> object_array_art_field(self, AllocClass(self, java_lang_Class.get(),
310 sizeof(mirror::Class)));
311 object_array_art_field->SetComponentType(java_lang_reflect_ArtField.get());
312 SetClassRoot(kJavaLangReflectArtFieldArrayClass, object_array_art_field.get());
Mathieu Chartier66f19252012-09-18 08:57:04 -0700313
Ian Rogers23435d02012-09-24 11:23:12 -0700314 // Setup boot_class_path_ and register class_path now that we can use AllocObjectArray to create
315 // DexCache instances. Needs to be after String, Field, Method arrays since AllocDexCache uses
316 // these roots.
Mathieu Chartier66f19252012-09-18 08:57:04 -0700317 CHECK_NE(0U, boot_class_path.size());
318 for (size_t i = 0; i != boot_class_path.size(); ++i) {
319 const DexFile* dex_file = boot_class_path[i];
320 CHECK(dex_file != NULL);
321 AppendToBootClassPath(*dex_file);
322 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700323
324 // now we can use FindSystemClass
325
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700326 // run char class through InitializePrimitiveClass to finish init
Ian Rogersc8982582012-09-07 16:53:25 -0700327 InitializePrimitiveClass(char_class.get(), Primitive::kPrimChar);
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700328 SetClassRoot(kPrimitiveChar, char_class.get()); // needs descriptor
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -0700329
Jeff Hao88474b42013-10-23 16:24:40 -0700330 // Create runtime resolution and imt conflict methods. Also setup the default imt.
331 Runtime* runtime = Runtime::Current();
332 runtime->SetResolutionMethod(runtime->CreateResolutionMethod());
333 runtime->SetImtConflictMethod(runtime->CreateImtConflictMethod());
334 runtime->SetDefaultImt(runtime->CreateDefaultImt(this));
335
Mathieu Chartier66f19252012-09-18 08:57:04 -0700336 // Object, String and DexCache need to be rerun through FindSystemClass to finish init
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700337 java_lang_Object->SetStatus(mirror::Class::kStatusNotReady, self);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800338 mirror::Class* Object_class = FindSystemClass("Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700339 CHECK_EQ(java_lang_Object.get(), Object_class);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800340 CHECK_EQ(java_lang_Object->GetObjectSize(), sizeof(mirror::Object));
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700341 java_lang_String->SetStatus(mirror::Class::kStatusNotReady, self);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800342 mirror::Class* String_class = FindSystemClass("Ljava/lang/String;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700343 CHECK_EQ(java_lang_String.get(), String_class);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800344 CHECK_EQ(java_lang_String->GetObjectSize(), sizeof(mirror::String));
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700345 java_lang_DexCache->SetStatus(mirror::Class::kStatusNotReady, self);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800346 mirror::Class* DexCache_class = FindSystemClass("Ljava/lang/DexCache;");
Mathieu Chartier66f19252012-09-18 08:57:04 -0700347 CHECK_EQ(java_lang_String.get(), String_class);
348 CHECK_EQ(java_lang_DexCache.get(), DexCache_class);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800349 CHECK_EQ(java_lang_DexCache->GetObjectSize(), sizeof(mirror::DexCache));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700350
Ian Rogers23435d02012-09-24 11:23:12 -0700351 // Setup the primitive array type classes - can't be done until Object has a vtable.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700352 SetClassRoot(kBooleanArrayClass, FindSystemClass("[Z"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800353 mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700354
355 SetClassRoot(kByteArrayClass, FindSystemClass("[B"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800356 mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700357
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800358 mirror::Class* found_char_array_class = FindSystemClass("[C");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700359 CHECK_EQ(char_array_class.get(), found_char_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700360
361 SetClassRoot(kShortArrayClass, FindSystemClass("[S"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800362 mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700363
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800364 mirror::Class* found_int_array_class = FindSystemClass("[I");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700365 CHECK_EQ(int_array_class.get(), found_int_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700366
367 SetClassRoot(kLongArrayClass, FindSystemClass("[J"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800368 mirror::LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700369
370 SetClassRoot(kFloatArrayClass, FindSystemClass("[F"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800371 mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700372
373 SetClassRoot(kDoubleArrayClass, FindSystemClass("[D"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800374 mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700375
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800376 mirror::Class* found_class_array_class = FindSystemClass("[Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700377 CHECK_EQ(class_array_class.get(), found_class_array_class);
Elliott Hughes418d20f2011-09-22 14:00:39 -0700378
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800379 mirror::Class* found_object_array_class = FindSystemClass("[Ljava/lang/Object;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700380 CHECK_EQ(object_array_class.get(), found_object_array_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700381
Ian Rogers23435d02012-09-24 11:23:12 -0700382 // Setup the single, global copy of "iftable".
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800383 mirror::Class* java_lang_Cloneable = FindSystemClass("Ljava/lang/Cloneable;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700384 CHECK(java_lang_Cloneable != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800385 mirror::Class* java_io_Serializable = FindSystemClass("Ljava/io/Serializable;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700386 CHECK(java_io_Serializable != NULL);
Ian Rogers23435d02012-09-24 11:23:12 -0700387 // We assume that Cloneable/Serializable don't have superinterfaces -- normally we'd have to
388 // crawl up and explicitly list all of the supers as well.
Ian Rogers9bc81912012-10-11 21:43:36 -0700389 array_iftable_->SetInterface(0, java_lang_Cloneable);
390 array_iftable_->SetInterface(1, java_io_Serializable);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700391
Ian Rogers23435d02012-09-24 11:23:12 -0700392 // Sanity check Class[] and Object[]'s interfaces.
Mathieu Chartier590fee92013-09-13 13:46:47 -0700393 ClassHelper kh(class_array_class.get());
Ian Rogersd24e2642012-06-06 21:21:43 -0700394 CHECK_EQ(java_lang_Cloneable, kh.GetDirectInterface(0));
395 CHECK_EQ(java_io_Serializable, kh.GetDirectInterface(1));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800396 kh.ChangeClass(object_array_class.get());
Ian Rogersd24e2642012-06-06 21:21:43 -0700397 CHECK_EQ(java_lang_Cloneable, kh.GetDirectInterface(0));
398 CHECK_EQ(java_io_Serializable, kh.GetDirectInterface(1));
Brian Carlstromea46f952013-07-30 01:26:50 -0700399 // Run Class, ArtField, and ArtMethod through FindSystemClass. This initializes their
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700400 // dex_cache_ fields and register them in class_table_.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800401 mirror::Class* Class_class = FindSystemClass("Ljava/lang/Class;");
Brian Carlstrom40381fb2011-10-19 14:13:40 -0700402 CHECK_EQ(java_lang_Class.get(), Class_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700403
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700404 java_lang_reflect_ArtMethod->SetStatus(mirror::Class::kStatusNotReady, self);
Brian Carlstromea46f952013-07-30 01:26:50 -0700405 mirror::Class* Art_method_class = FindSystemClass("Ljava/lang/reflect/ArtMethod;");
406 CHECK_EQ(java_lang_reflect_ArtMethod.get(), Art_method_class);
Mathieu Chartier66f19252012-09-18 08:57:04 -0700407
Ian Rogers7dfb28c2013-08-22 08:18:36 -0700408 java_lang_reflect_ArtField->SetStatus(mirror::Class::kStatusNotReady, self);
Brian Carlstromea46f952013-07-30 01:26:50 -0700409 mirror::Class* Art_field_class = FindSystemClass("Ljava/lang/reflect/ArtField;");
410 CHECK_EQ(java_lang_reflect_ArtField.get(), Art_field_class);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700411
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800412 mirror::Class* String_array_class = FindSystemClass(class_roots_descriptors_[kJavaLangStringArrayClass]);
Mathieu Chartier66f19252012-09-18 08:57:04 -0700413 CHECK_EQ(object_array_string.get(), String_array_class);
414
Brian Carlstromea46f952013-07-30 01:26:50 -0700415 mirror::Class* Art_method_array_class =
416 FindSystemClass(class_roots_descriptors_[kJavaLangReflectArtMethodArrayClass]);
417 CHECK_EQ(object_array_art_method.get(), Art_method_array_class);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700418
Brian Carlstromea46f952013-07-30 01:26:50 -0700419 mirror::Class* Art_field_array_class =
420 FindSystemClass(class_roots_descriptors_[kJavaLangReflectArtFieldArrayClass]);
421 CHECK_EQ(object_array_art_field.get(), Art_field_array_class);
Ian Rogers4445a7e2012-10-05 17:19:13 -0700422
Ian Rogers23435d02012-09-24 11:23:12 -0700423 // End of special init trickery, subsequent classes may be loaded via FindSystemClass.
Ian Rogers466bb252011-10-14 03:29:56 -0700424
Ian Rogers23435d02012-09-24 11:23:12 -0700425 // Create java.lang.reflect.Proxy root.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800426 mirror::Class* java_lang_reflect_Proxy = FindSystemClass("Ljava/lang/reflect/Proxy;");
Ian Rogers466bb252011-10-14 03:29:56 -0700427 SetClassRoot(kJavaLangReflectProxy, java_lang_reflect_Proxy);
428
Brian Carlstrom1f870082011-08-23 16:02:11 -0700429 // java.lang.ref classes need to be specially flagged, but otherwise are normal classes
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800430 mirror::Class* java_lang_ref_Reference = FindSystemClass("Ljava/lang/ref/Reference;");
Elliott Hughesbf61ba32011-10-11 10:53:09 -0700431 SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800432 mirror::Class* java_lang_ref_FinalizerReference = FindSystemClass("Ljava/lang/ref/FinalizerReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700433 java_lang_ref_FinalizerReference->SetAccessFlags(
434 java_lang_ref_FinalizerReference->GetAccessFlags() |
435 kAccClassIsReference | kAccClassIsFinalizerReference);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800436 mirror::Class* java_lang_ref_PhantomReference = FindSystemClass("Ljava/lang/ref/PhantomReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700437 java_lang_ref_PhantomReference->SetAccessFlags(
438 java_lang_ref_PhantomReference->GetAccessFlags() |
439 kAccClassIsReference | kAccClassIsPhantomReference);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800440 mirror::Class* java_lang_ref_SoftReference = FindSystemClass("Ljava/lang/ref/SoftReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700441 java_lang_ref_SoftReference->SetAccessFlags(
442 java_lang_ref_SoftReference->GetAccessFlags() | kAccClassIsReference);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800443 mirror::Class* java_lang_ref_WeakReference = FindSystemClass("Ljava/lang/ref/WeakReference;");
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700444 java_lang_ref_WeakReference->SetAccessFlags(
445 java_lang_ref_WeakReference->GetAccessFlags() |
446 kAccClassIsReference | kAccClassIsWeakReference);
Brian Carlstrom1f870082011-08-23 16:02:11 -0700447
Ian Rogers23435d02012-09-24 11:23:12 -0700448 // Setup the ClassLoader, verifying the object_size_.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800449 mirror::Class* java_lang_ClassLoader = FindSystemClass("Ljava/lang/ClassLoader;");
450 CHECK_EQ(java_lang_ClassLoader->GetObjectSize(), sizeof(mirror::ClassLoader));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700451 SetClassRoot(kJavaLangClassLoader, java_lang_ClassLoader);
452
jeffhao8cd6dda2012-02-22 10:15:34 -0800453 // Set up java.lang.Throwable, java.lang.ClassNotFoundException, and
Ian Rogers23435d02012-09-24 11:23:12 -0700454 // java.lang.StackTraceElement as a convenience.
Ian Rogers5167c972012-02-03 10:41:20 -0800455 SetClassRoot(kJavaLangThrowable, FindSystemClass("Ljava/lang/Throwable;"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800456 mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
jeffhao8cd6dda2012-02-22 10:15:34 -0800457 SetClassRoot(kJavaLangClassNotFoundException, FindSystemClass("Ljava/lang/ClassNotFoundException;"));
Brian Carlstrom1f870082011-08-23 16:02:11 -0700458 SetClassRoot(kJavaLangStackTraceElement, FindSystemClass("Ljava/lang/StackTraceElement;"));
459 SetClassRoot(kJavaLangStackTraceElementArrayClass, FindSystemClass("[Ljava/lang/StackTraceElement;"));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800460 mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Elliott Hughesd8ddfd52011-08-15 14:32:53 -0700461
Brian Carlstroma663ea52011-08-19 23:33:41 -0700462 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700463
Brian Carlstroma004aa92012-02-08 18:05:09 -0800464 VLOG(startup) << "ClassLinker::InitFromCompiler exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -0700465}
466
467void ClassLinker::FinishInit() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800468 VLOG(startup) << "ClassLinker::FinishInit entering";
Brian Carlstrom16192862011-09-12 17:50:06 -0700469
470 // Let the heap know some key offsets into java.lang.ref instances
Elliott Hughes20cde902011-10-04 17:37:27 -0700471 // Note: we hard code the field indexes here rather than using FindInstanceField
Brian Carlstrom16192862011-09-12 17:50:06 -0700472 // as the types of the field can't be resolved prior to the runtime being
473 // fully initialized
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800474 mirror::Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference);
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700475 mirror::Class* java_lang_ref_FinalizerReference =
476 FindSystemClass("Ljava/lang/ref/FinalizerReference;");
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800477
Brian Carlstromea46f952013-07-30 01:26:50 -0700478 mirror::ArtField* pendingNext = java_lang_ref_Reference->GetInstanceField(0);
Mathieu Chartier590fee92013-09-13 13:46:47 -0700479 FieldHelper fh(pendingNext);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800480 CHECK_STREQ(fh.GetName(), "pendingNext");
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700481 CHECK_STREQ(fh.GetTypeDescriptor(), "Ljava/lang/ref/Reference;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700482
Brian Carlstromea46f952013-07-30 01:26:50 -0700483 mirror::ArtField* queue = java_lang_ref_Reference->GetInstanceField(1);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800484 fh.ChangeField(queue);
485 CHECK_STREQ(fh.GetName(), "queue");
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700486 CHECK_STREQ(fh.GetTypeDescriptor(), "Ljava/lang/ref/ReferenceQueue;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700487
Brian Carlstromea46f952013-07-30 01:26:50 -0700488 mirror::ArtField* queueNext = java_lang_ref_Reference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800489 fh.ChangeField(queueNext);
490 CHECK_STREQ(fh.GetName(), "queueNext");
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700491 CHECK_STREQ(fh.GetTypeDescriptor(), "Ljava/lang/ref/Reference;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700492
Brian Carlstromea46f952013-07-30 01:26:50 -0700493 mirror::ArtField* referent = java_lang_ref_Reference->GetInstanceField(3);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800494 fh.ChangeField(referent);
495 CHECK_STREQ(fh.GetName(), "referent");
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700496 CHECK_STREQ(fh.GetTypeDescriptor(), "Ljava/lang/Object;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700497
Brian Carlstromea46f952013-07-30 01:26:50 -0700498 mirror::ArtField* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -0800499 fh.ChangeField(zombie);
500 CHECK_STREQ(fh.GetName(), "zombie");
Ian Rogers8b2c0b92013-09-19 02:56:49 -0700501 CHECK_STREQ(fh.GetTypeDescriptor(), "Ljava/lang/Object;");
Brian Carlstrom16192862011-09-12 17:50:06 -0700502
Ian Rogers1d54e732013-05-02 21:10:01 -0700503 gc::Heap* heap = Runtime::Current()->GetHeap();
Elliott Hughesb3bd5f02012-03-08 21:05:27 -0800504 heap->SetReferenceOffsets(referent->GetOffset(),
Brian Carlstrom16192862011-09-12 17:50:06 -0700505 queue->GetOffset(),
506 queueNext->GetOffset(),
507 pendingNext->GetOffset(),
508 zombie->GetOffset());
509
Brian Carlstroma663ea52011-08-19 23:33:41 -0700510 // ensure all class_roots_ are initialized
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700511 for (size_t i = 0; i < kClassRootsMax; i++) {
Brian Carlstroma663ea52011-08-19 23:33:41 -0700512 ClassRoot class_root = static_cast<ClassRoot>(i);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800513 mirror::Class* klass = GetClassRoot(class_root);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700514 CHECK(klass != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -0700515 DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != NULL);
Brian Carlstroma663ea52011-08-19 23:33:41 -0700516 // note SetClassRoot does additional validation.
517 // if possible add new checks there to catch errors early
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700518 }
519
Elliott Hughes92f14b22011-10-06 12:29:54 -0700520 CHECK(array_iftable_ != NULL);
Elliott Hughes92f14b22011-10-06 12:29:54 -0700521
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700522 // disable the slow paths in FindClass and CreatePrimitiveClass now
523 // that Object, Class, and Object[] are setup
524 init_done_ = true;
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -0700525
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -0800526 VLOG(startup) << "ClassLinker::FinishInit exiting";
Brian Carlstrom75cb3b42011-07-28 02:13:36 -0700527}
528
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700529void ClassLinker::RunRootClinits() {
530 Thread* self = Thread::Current();
531 for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -0800532 mirror::Class* c = GetClassRoot(ClassRoot(i));
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700533 if (!c->IsArrayClass() && !c->IsPrimitive()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -0800534 SirtRef<mirror::Class> sirt_class(self, GetClassRoot(ClassRoot(i)));
535 EnsureInitialized(sirt_class, true, true);
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700536 self->AssertNoPendingException();
Elliott Hughes2a20cfd2011-09-23 19:30:41 -0700537 }
538 }
539}
540
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700541bool ClassLinker::GenerateOatFile(const char* dex_filename,
Brian Carlstromd601af82012-01-06 10:15:19 -0800542 int oat_fd,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700543 const char* oat_cache_filename) {
544 Locks::mutator_lock_->AssertNotHeld(Thread::Current()); // Avoid starving GC.
Brian Carlstroma56fcd62012-02-04 21:23:01 -0800545 std::string dex2oat_string(GetAndroidRoot());
Elliott Hughes67d92002012-03-26 15:08:51 -0700546 dex2oat_string += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800547 const char* dex2oat = dex2oat_string.c_str();
548
Brian Carlstroma004aa92012-02-08 18:05:09 -0800549 const char* class_path = Runtime::Current()->GetClassPathString().c_str();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800550
Ian Rogers1d54e732013-05-02 21:10:01 -0700551 gc::Heap* heap = Runtime::Current()->GetHeap();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800552 std::string boot_image_option_string("--boot-image=");
Brian Carlstromfddf6f62012-03-15 16:56:45 -0700553 boot_image_option_string += heap->GetImageSpace()->GetImageFilename();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800554 const char* boot_image_option = boot_image_option_string.c_str();
555
556 std::string dex_file_option_string("--dex-file=");
Brian Carlstromd601af82012-01-06 10:15:19 -0800557 dex_file_option_string += dex_filename;
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800558 const char* dex_file_option = dex_file_option_string.c_str();
559
Brian Carlstromd601af82012-01-06 10:15:19 -0800560 std::string oat_fd_option_string("--oat-fd=");
Brian Carlstrom866c8622012-01-06 16:35:13 -0800561 StringAppendF(&oat_fd_option_string, "%d", oat_fd);
Brian Carlstromd601af82012-01-06 10:15:19 -0800562 const char* oat_fd_option = oat_fd_option_string.c_str();
563
Brian Carlstroma004aa92012-02-08 18:05:09 -0800564 std::string oat_location_option_string("--oat-location=");
565 oat_location_option_string += oat_cache_filename;
566 const char* oat_location_option = oat_location_option_string.c_str();
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800567
buzbeea024a062013-07-31 10:47:37 -0700568 std::string oat_compiler_filter_string("-compiler-filter:");
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700569 Runtime::CompilerFilter filter = Runtime::Current()->GetCompilerFilter();
570 switch (filter) {
buzbeea024a062013-07-31 10:47:37 -0700571 case Runtime::kInterpretOnly:
572 oat_compiler_filter_string += "interpret-only";
573 break;
buzbeea024a062013-07-31 10:47:37 -0700574 case Runtime::kSpace:
575 oat_compiler_filter_string += "space";
576 break;
577 case Runtime::kBalanced:
578 oat_compiler_filter_string += "balanced";
579 break;
580 case Runtime::kSpeed:
581 oat_compiler_filter_string += "speed";
582 break;
buzbeefe9ca402013-08-21 09:48:11 -0700583 case Runtime::kEverything:
584 oat_compiler_filter_string += "everything";
585 break;
buzbeea024a062013-07-31 10:47:37 -0700586 default:
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700587 LOG(FATAL) << "Unexpected case: " << filter;
buzbeea024a062013-07-31 10:47:37 -0700588 }
589 const char* oat_compiler_filter_option = oat_compiler_filter_string.c_str();
590
jeffhao262bf462011-10-20 18:36:32 -0700591 // fork and exec dex2oat
592 pid_t pid = fork();
593 if (pid == 0) {
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800594 // no allocation allowed between fork and exec
Ian Rogers725aee52012-01-11 11:56:56 -0800595
596 // change process groups, so we don't get reaped by ProcessManager
597 setpgid(0, 0);
598
Brian Carlstromb00309f2013-09-30 14:23:30 -0700599 // gLogVerbosity.class_linker = true;
jeffhao10037c82012-01-23 15:06:23 -0800600 VLOG(class_linker) << dex2oat
601 << " --runtime-arg -Xms64m"
602 << " --runtime-arg -Xmx64m"
603 << " --runtime-arg -classpath"
604 << " --runtime-arg " << class_path
buzbeea024a062013-07-31 10:47:37 -0700605 << " --runtime-arg " << oat_compiler_filter_option
Brian Carlstrom265091e2013-01-30 14:08:26 -0800606#if !defined(ART_TARGET)
607 << " --host"
608#endif
jeffhao10037c82012-01-23 15:06:23 -0800609 << " " << boot_image_option
610 << " " << dex_file_option
611 << " " << oat_fd_option
Brian Carlstroma004aa92012-02-08 18:05:09 -0800612 << " " << oat_location_option;
jeffhao10037c82012-01-23 15:06:23 -0800613
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800614 execl(dex2oat, dex2oat,
jeffhao5d840402011-10-24 17:09:45 -0700615 "--runtime-arg", "-Xms64m",
616 "--runtime-arg", "-Xmx64m",
Jesse Wilson254db0f2011-11-16 16:44:11 -0500617 "--runtime-arg", "-classpath",
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800618 "--runtime-arg", class_path,
buzbeea024a062013-07-31 10:47:37 -0700619 "--runtime-arg", oat_compiler_filter_option,
Brian Carlstrom265091e2013-01-30 14:08:26 -0800620#if !defined(ART_TARGET)
621 "--host",
622#endif
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800623 boot_image_option,
624 dex_file_option,
Brian Carlstromd601af82012-01-06 10:15:19 -0800625 oat_fd_option,
Brian Carlstroma004aa92012-02-08 18:05:09 -0800626 oat_location_option,
jeffhao262bf462011-10-20 18:36:32 -0700627 NULL);
628
Brian Carlstrom29e7ac72011-12-05 23:42:57 -0800629 PLOG(FATAL) << "execl(" << dex2oat << ") failed";
Brian Carlstromd601af82012-01-06 10:15:19 -0800630 return false;
jeffhao262bf462011-10-20 18:36:32 -0700631 } else {
632 // wait for dex2oat to finish
633 int status;
634 pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
635 if (got_pid != pid) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700636 ScopedObjectAccess soa(Thread::Current());
637 ThrowIOException("Failed to create oat file. Waitpid failed: wanted %d, got %d", pid,
638 got_pid);
Brian Carlstromd601af82012-01-06 10:15:19 -0800639 return false;
jeffhao262bf462011-10-20 18:36:32 -0700640 }
641 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700642 ScopedObjectAccess soa(Thread::Current());
643 ThrowIOException("Failed to create oat file. %s failed with dex-file '%s'", dex2oat,
644 dex_filename);
Brian Carlstromd601af82012-01-06 10:15:19 -0800645 return false;
jeffhao262bf462011-10-20 18:36:32 -0700646 }
647 }
Brian Carlstromd601af82012-01-06 10:15:19 -0800648 return true;
jeffhao262bf462011-10-20 18:36:32 -0700649}
650
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700651const OatFile* ClassLinker::RegisterOatFile(const OatFile* oat_file) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700652 WriterMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700653 for (size_t i = 0; i < oat_files_.size(); ++i) {
654 if (UNLIKELY(oat_file->GetLocation() == oat_files_[i]->GetLocation())) {
655 VLOG(class_linker) << "Attempt to register oat file that's already registered: "
656 << oat_file->GetLocation();
657 for (size_t j = i; j < oat_files_.size(); ++j) {
658 CHECK_NE(oat_file, oat_files_[j]) << "Attempt to re-register dex file.";
659 }
660 delete oat_file;
661 return oat_files_[i];
Ian Rogers1bf8d4d2013-05-30 00:18:49 -0700662 }
Ian Rogers2bcb4a42012-11-08 10:39:18 -0800663 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700664 VLOG(class_linker) << "Registering " << oat_file->GetLocation();
665 oat_files_.push_back(oat_file);
666 return oat_file;
Brian Carlstrom866c8622012-01-06 16:35:13 -0800667}
668
Brian Carlstrom56d947f2013-07-15 13:14:23 -0700669OatFile& ClassLinker::GetImageOatFile(gc::space::ImageSpace* space) {
670 VLOG(startup) << "ClassLinker::GetImageOatFile entering";
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700671 OatFile* oat_file = space->ReleaseOatFile();
672 CHECK_EQ(RegisterOatFile(oat_file), oat_file);
Brian Carlstrom56d947f2013-07-15 13:14:23 -0700673 VLOG(startup) << "ClassLinker::GetImageOatFile exiting";
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700674 return *oat_file;
Brian Carlstrom58ae9412011-10-04 00:56:06 -0700675}
676
Brian Carlstromae826982011-11-09 01:33:42 -0800677const OatFile* ClassLinker::FindOpenedOatFileForDexFile(const DexFile& dex_file) {
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800678 const char* dex_location = dex_file.GetLocation().c_str();
679 uint32_t dex_location_checksum = dex_file.GetLocationChecksum();
680 return FindOpenedOatFileFromDexLocation(dex_location, &dex_location_checksum);
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800681}
682
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700683const OatFile* ClassLinker::FindOpenedOatFileFromDexLocation(const char* dex_location,
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800684 const uint32_t* const dex_location_checksum) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700685 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstromae826982011-11-09 01:33:42 -0800686 for (size_t i = 0; i < oat_files_.size(); i++) {
687 const OatFile* oat_file = oat_files_[i];
688 DCHECK(oat_file != NULL);
Brian Carlstrom756ee4e2013-10-03 15:46:12 -0700689 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location,
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800690 dex_location_checksum,
Brian Carlstrom756ee4e2013-10-03 15:46:12 -0700691 false);
Brian Carlstroma004aa92012-02-08 18:05:09 -0800692 if (oat_dex_file != NULL) {
Brian Carlstromae826982011-11-09 01:33:42 -0800693 return oat_file;
694 }
695 }
696 return NULL;
697}
698
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700699const DexFile* ClassLinker::FindDexFileInOatLocation(const char* dex_location,
Ian Rogerse3359f72013-06-11 15:14:11 -0700700 uint32_t dex_location_checksum,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700701 const char* oat_location,
702 std::string* error_msg) {
Brian Carlstromf1d34552013-07-12 20:22:23 -0700703 UniquePtr<OatFile> oat_file(OatFile::Open(oat_location, oat_location, NULL,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700704 !Runtime::Current()->IsCompiler(),
705 error_msg));
706 if (oat_file.get() == nullptr) {
707 *error_msg = StringPrintf("Failed to find existing oat file at %s: %s", oat_location,
708 error_msg->c_str());
709 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800710 }
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700711 Runtime* runtime = Runtime::Current();
712 const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader();
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700713 uint32_t expected_image_oat_checksum = image_header.GetOatChecksum();
714 uint32_t actual_image_oat_checksum = oat_file->GetOatHeader().GetImageFileLocationOatChecksum();
715 if (expected_image_oat_checksum != actual_image_oat_checksum) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700716 *error_msg = StringPrintf("Failed to find oat file at '%s' with expected image oat checksum of "
717 "0x%x, found 0x%x", oat_location, expected_image_oat_checksum,
718 actual_image_oat_checksum);
719 return nullptr;
Brian Carlstrom28db0122012-10-18 16:20:41 -0700720 }
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700721
722 uint32_t expected_image_oat_offset = reinterpret_cast<uint32_t>(image_header.GetOatDataBegin());
723 uint32_t actual_image_oat_offset = oat_file->GetOatHeader().GetImageFileLocationOatDataBegin();
724 if (expected_image_oat_offset != actual_image_oat_offset) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700725 *error_msg = StringPrintf("Failed to find oat file at '%s' with expected image oat offset %ud, "
726 "found %ud", oat_location, expected_image_oat_offset,
727 actual_image_oat_offset);
728 return nullptr;
Brian Carlstrom81f3ca12012-03-17 00:27:35 -0700729 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700730 // TODO: this registers the oat file now as we may use the oat_dex_file later and we want the
731 // intern behavior of RegisterOatFile. However, if we take an early return we could remove
732 // the oat file.
733 const OatFile* opened_oat_file = RegisterOatFile(oat_file.release());
734 const OatFile::OatDexFile* oat_dex_file = opened_oat_file->GetOatDexFile(dex_location,
735 &dex_location_checksum);
736 if (oat_dex_file == nullptr) {
737 *error_msg = StringPrintf("Failed to find oat file at '%s' containing '%s'", oat_location,
738 dex_location);
739 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800740 }
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700741 uint32_t expected_dex_checksum = dex_location_checksum;
742 uint32_t actual_dex_checksum = oat_dex_file->GetDexFileLocationChecksum();
743 if (expected_dex_checksum != actual_dex_checksum) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700744 *error_msg = StringPrintf("Failed to find oat file at '%s' with expected dex checksum of 0x%x, "
745 "found 0x%x", oat_location, expected_dex_checksum,
746 actual_dex_checksum);
747 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800748 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700749 return oat_dex_file->OpenDexFile(error_msg);
Ian Rogers00f7d0e2012-07-19 15:28:27 -0700750}
751
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700752class ScopedFlock {
753 public:
754 ScopedFlock() {}
755
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700756 bool Init(const char* filename, std::string* error_msg) {
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700757 while (true) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700758 file_.reset(OS::OpenFileWithFlags(filename, O_CREAT | O_RDWR));
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700759 if (file_.get() == NULL) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700760 *error_msg = StringPrintf("Failed to open file '%s'", filename);
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700761 return false;
762 }
763 int flock_result = TEMP_FAILURE_RETRY(flock(file_->Fd(), LOCK_EX));
764 if (flock_result != 0) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700765 *error_msg = StringPrintf("Failed to lock file '%s': %s", filename, strerror(errno));
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700766 return false;
767 }
768 struct stat fstat_stat;
769 int fstat_result = TEMP_FAILURE_RETRY(fstat(file_->Fd(), &fstat_stat));
770 if (fstat_result != 0) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700771 *error_msg = StringPrintf("Failed to fstat file '%s': %s", filename, strerror(errno));
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700772 return false;
773 }
774 struct stat stat_stat;
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700775 int stat_result = TEMP_FAILURE_RETRY(stat(filename, &stat_stat));
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700776 if (stat_result != 0) {
777 PLOG(WARNING) << "Failed to stat, will retry: " << filename;
778 // ENOENT can happen if someone racing with us unlinks the file we created so just retry.
779 continue;
780 }
781 if (fstat_stat.st_dev != stat_stat.st_dev || fstat_stat.st_ino != stat_stat.st_ino) {
782 LOG(WARNING) << "File changed while locking, will retry: " << filename;
783 continue;
784 }
785 return true;
786 }
787 }
788
789 File& GetFile() {
790 return *file_;
791 }
792
793 ~ScopedFlock() {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -0700794 if (file_.get() != NULL) {
795 int flock_result = TEMP_FAILURE_RETRY(flock(file_->Fd(), LOCK_UN));
796 CHECK_EQ(0, flock_result);
797 }
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700798 }
799
800 private:
801 UniquePtr<File> file_;
802
803 DISALLOW_COPY_AND_ASSIGN(ScopedFlock);
804};
805
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700806const DexFile* ClassLinker::FindOrCreateOatFileForDexLocation(const char* dex_location,
807 uint32_t dex_location_checksum,
808 const char* oat_location,
809 std::string* error_msg) {
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700810 // We play a locking game here so that if two different processes
811 // race to generate (or worse, one tries to open a partial generated
812 // file) we will be okay. This is actually common with apps that use
813 // DexClassLoader to work around the dex method reference limit and
814 // that have a background service running in a separate process.
815 ScopedFlock scoped_flock;
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700816 if (!scoped_flock.Init(oat_location, error_msg)) {
817 return nullptr;
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700818 }
819
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800820 // Check if we already have an up-to-date output file
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700821 const DexFile* dex_file = FindDexFileInOatLocation(dex_location, dex_location_checksum,
822 oat_location, error_msg);
823 if (dex_file != nullptr) {
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800824 return dex_file;
825 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700826 VLOG(class_linker) << "Failed to find dex file '" << dex_location << "' in oat location '"
827 << oat_location << "': " << *error_msg;
828 error_msg->clear();
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800829
830 // Generate the output oat file for the dex file
Brian Carlstrom7571e8b2013-08-12 17:04:14 -0700831 VLOG(class_linker) << "Generating oat file " << oat_location << " for " << dex_location;
832 if (!GenerateOatFile(dex_location, scoped_flock.GetFile().Fd(), oat_location)) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700833 CHECK(Thread::Current()->IsExceptionPending());
834 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800835 }
Brian Carlstromf1d34552013-07-12 20:22:23 -0700836 const OatFile* oat_file = OatFile::Open(oat_location, oat_location, NULL,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700837 !Runtime::Current()->IsCompiler(),
838 error_msg);
839 if (oat_file == nullptr) {
840 *error_msg = StringPrintf("Failed to open generated oat file '%s': %s",
841 oat_location, error_msg->c_str());
842 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800843 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700844 oat_file = RegisterOatFile(oat_file);
845 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location,
846 &dex_location_checksum);
847 if (oat_dex_file == nullptr) {
848 *error_msg = StringPrintf("Failed to find dex file '%s' (checksum 0x%x) in generated out file "
849 "'%s'", dex_location, dex_location_checksum, oat_location);
850 return nullptr;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800851 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700852 const DexFile* result = oat_dex_file->OpenDexFile(error_msg);
853 CHECK(result != nullptr) << *error_msg;
Brian Carlstrom756ee4e2013-10-03 15:46:12 -0700854 CHECK_EQ(dex_location_checksum, result->GetLocationChecksum())
855 << "dex_location=" << dex_location << " oat_location=" << oat_location << std::hex
856 << " dex_location_checksum=" << dex_location_checksum
Brian Carlstromb00309f2013-09-30 14:23:30 -0700857 << " DexFile::GetLocationChecksum()=" << result->GetLocationChecksum();
858 return result;
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800859}
860
Brian Carlstromafe25512012-06-27 17:02:58 -0700861bool ClassLinker::VerifyOatFileChecksums(const OatFile* oat_file,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700862 const char* dex_location,
863 uint32_t dex_location_checksum,
864 std::string* error_msg) {
Brian Carlstromafe25512012-06-27 17:02:58 -0700865 Runtime* runtime = Runtime::Current();
866 const ImageHeader& image_header = runtime->GetHeap()->GetImageSpace()->GetImageHeader();
Brian Carlstrom28db0122012-10-18 16:20:41 -0700867 uint32_t image_oat_checksum = image_header.GetOatChecksum();
Brian Carlstrom700c8d32012-11-05 10:42:02 -0800868 uint32_t image_oat_data_begin = reinterpret_cast<uint32_t>(image_header.GetOatDataBegin());
Brian Carlstrom28db0122012-10-18 16:20:41 -0700869 bool image_check = ((oat_file->GetOatHeader().GetImageFileLocationOatChecksum() == image_oat_checksum)
Brian Carlstrom700c8d32012-11-05 10:42:02 -0800870 && (oat_file->GetOatHeader().GetImageFileLocationOatDataBegin() == image_oat_data_begin));
Brian Carlstrom46b8a622012-06-19 23:13:22 -0700871
Brian Carlstrom756ee4e2013-10-03 15:46:12 -0700872 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, &dex_location_checksum);
Brian Carlstromafe25512012-06-27 17:02:58 -0700873 if (oat_dex_file == NULL) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700874 *error_msg = StringPrintf("oat file '%s' does not contain contents for '%s' with checksum 0x%x",
875 oat_file->GetLocation().c_str(), dex_location, dex_location_checksum);
Brian Carlstromafe25512012-06-27 17:02:58 -0700876 std::vector<const OatFile::OatDexFile*> oat_dex_files = oat_file->GetOatDexFiles();
877 for (size_t i = 0; i < oat_dex_files.size(); i++) {
878 const OatFile::OatDexFile* oat_dex_file = oat_dex_files[i];
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700879 *error_msg += StringPrintf("\noat file '%s' contains contents for '%s'",
880 oat_file->GetLocation().c_str(),
881 oat_dex_file->GetDexFileLocation().c_str());
Brian Carlstromafe25512012-06-27 17:02:58 -0700882 }
883 return false;
884 }
Brian Carlstrom28db0122012-10-18 16:20:41 -0700885 bool dex_check = dex_location_checksum == oat_dex_file->GetDexFileLocationChecksum();
Brian Carlstrom46b8a622012-06-19 23:13:22 -0700886
Brian Carlstromafe25512012-06-27 17:02:58 -0700887 if (image_check && dex_check) {
888 return true;
889 }
Brian Carlstrom46b8a622012-06-19 23:13:22 -0700890
Brian Carlstromafe25512012-06-27 17:02:58 -0700891 if (!image_check) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700892 ScopedObjectAccess soa(Thread::Current());
893 mirror::String* oat_location = image_header.GetImageRoot(ImageHeader::kOatLocation)->AsString();
894 std::string image_file(oat_location->ToModifiedUtf8());
895 *error_msg = StringPrintf("oat file '%s' mismatch (0x%x, %d) with '%s' (0x%x, %d)",
896 oat_file->GetLocation().c_str(),
897 oat_file->GetOatHeader().GetImageFileLocationOatChecksum(),
898 oat_file->GetOatHeader().GetImageFileLocationOatDataBegin(),
899 image_file.c_str(), image_oat_checksum, image_oat_data_begin);
Brian Carlstromafe25512012-06-27 17:02:58 -0700900 }
901 if (!dex_check) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700902 *error_msg = StringPrintf("oat file '%s' mismatch (0x%x) with '%s' (0x%x)",
903 oat_file->GetLocation().c_str(),
904 oat_dex_file->GetDexFileLocationChecksum(),
905 dex_location, dex_location_checksum);
Brian Carlstromafe25512012-06-27 17:02:58 -0700906 }
907 return false;
908}
909
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700910const DexFile* ClassLinker::VerifyAndOpenDexFileFromOatFile(const std::string& oat_file_location,
911 const char* dex_location,
912 std::string* error_msg,
913 bool* open_failed) {
914 UniquePtr<const OatFile> oat_file(FindOatFileFromOatLocation(oat_file_location, error_msg));
915 if (oat_file.get() == nullptr) {
916 *open_failed = true;
917 return nullptr;
Brian Carlstromafe25512012-06-27 17:02:58 -0700918 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700919 *open_failed = false;
920 uint32_t dex_location_checksum;
921 if (!DexFile::GetChecksum(dex_location, &dex_location_checksum, error_msg)) {
922 // If no classes.dex found in dex_location, it has been stripped or is corrupt, assume oat is
923 // up-to-date. This is the common case in user builds for jar's and apk's in the /system
924 // directory.
925 const OatFile* opened_oat_file = oat_file.release();
926 opened_oat_file = RegisterOatFile(opened_oat_file);
927 const OatFile::OatDexFile* oat_dex_file = opened_oat_file->GetOatDexFile(dex_location, NULL);
928 if (oat_dex_file == nullptr) {
929 *error_msg = StringPrintf("Dex checksum mismatch for location '%s' and failed to find oat "
930 "dex file '%s': %s", oat_file_location.c_str(), dex_location,
931 error_msg->c_str());
932 return nullptr;
933 }
934 return oat_dex_file->OpenDexFile(error_msg);
935 }
936
937 bool verified = VerifyOatFileChecksums(oat_file.get(), dex_location, dex_location_checksum,
938 error_msg);
939 if (!verified) {
940 return nullptr;
941 }
942 const OatFile* opened_oat_file = oat_file.release();
943 opened_oat_file = RegisterOatFile(opened_oat_file);
944 return opened_oat_file->GetOatDexFile(dex_location,
945 &dex_location_checksum)->OpenDexFile(error_msg);
Brian Carlstrom46b8a622012-06-19 23:13:22 -0700946}
947
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700948const DexFile* ClassLinker::FindDexFileInOatFileFromDexLocation(const char* dex_location,
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800949 const uint32_t* const dex_location_checksum,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700950 std::string* error_msg) {
Brian Carlstrom756ee4e2013-10-03 15:46:12 -0700951 const OatFile* open_oat_file = FindOpenedOatFileFromDexLocation(dex_location,
952 dex_location_checksum);
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700953 if (open_oat_file != nullptr) {
954 const OatFile::OatDexFile* oat_dex_file = open_oat_file->GetOatDexFile(dex_location,
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800955 dex_location_checksum);
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700956 return oat_dex_file->OpenDexFile(error_msg);
Brian Carlstromae826982011-11-09 01:33:42 -0800957 }
958
Brian Carlstrom46b8a622012-06-19 23:13:22 -0700959 // Look for an existing file next to dex. for example, for
Brian Carlstrom30e2ea42013-06-19 23:25:37 -0700960 // /foo/bar/baz.jar, look for /foo/bar/baz.odex.
961 std::string odex_filename(OatFile::DexFilenameToOdexFilename(dex_location));
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700962 bool open_failed;
963 const DexFile* dex_file = VerifyAndOpenDexFileFromOatFile(odex_filename, dex_location,
964 error_msg, &open_failed);
965 if (dex_file != nullptr) {
966 return dex_file;
Brian Carlstroma004aa92012-02-08 18:05:09 -0800967 }
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800968 if (dex_location_checksum == nullptr) {
969 *error_msg = StringPrintf("Failed to open oat file from %s and no classes.dex found in %s: %s",
970 odex_filename.c_str(), dex_location, error_msg->c_str());
971 return nullptr;
972 }
973
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700974 std::string cache_error_msg;
Brian Carlstrom30e2ea42013-06-19 23:25:37 -0700975 std::string cache_location(GetDalvikCacheFilenameOrDie(dex_location));
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700976 dex_file = VerifyAndOpenDexFileFromOatFile(cache_location, dex_location, &cache_error_msg,
977 &open_failed);
978 if (dex_file != nullptr) {
979 return dex_file;
jeffhao262bf462011-10-20 18:36:32 -0700980 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700981 if (!open_failed && TEMP_FAILURE_RETRY(unlink(cache_location.c_str())) != 0) {
982 PLOG(FATAL) << "Failed to remove obsolete oat file from " << cache_location;
983 }
984 VLOG(class_linker) << "Failed to open oat file from " << odex_filename
985 << " (error '" << *error_msg << "') or " << cache_location
986 << " (error '" << cache_error_msg << "').";
Brian Carlstroma004aa92012-02-08 18:05:09 -0800987
Brian Carlstrom5b332c82012-02-01 15:02:31 -0800988 // Try to generate oat file if it wasn't found or was obsolete.
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700989 error_msg->clear();
Brian Carlstrom08cbf662013-12-10 16:52:57 -0800990 return FindOrCreateOatFileForDexLocation(dex_location, *dex_location_checksum,
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700991 cache_location.c_str(), error_msg);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700992}
993
Brian Carlstromae826982011-11-09 01:33:42 -0800994const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) {
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700995 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -0700996 for (size_t i = 0; i < oat_files_.size(); i++) {
997 const OatFile* oat_file = oat_files_[i];
Ian Rogers8d31bbd2013-10-13 10:44:14 -0700998 DCHECK(oat_file != nullptr);
Brian Carlstromae826982011-11-09 01:33:42 -0800999 if (oat_file->GetLocation() == oat_location) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001000 return oat_file;
1001 }
1002 }
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001003 return nullptr;
Brian Carlstromfad71432011-10-16 20:25:10 -07001004}
Brian Carlstromaded5f72011-10-07 17:15:04 -07001005
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001006const OatFile* ClassLinker::FindOatFileFromOatLocation(const std::string& oat_location,
1007 std::string* error_msg) {
jeffhaof6174e82012-01-31 16:14:17 -08001008 const OatFile* oat_file = FindOpenedOatFileFromOatLocation(oat_location);
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001009 if (oat_file != nullptr) {
jeffhaof6174e82012-01-31 16:14:17 -08001010 return oat_file;
1011 }
1012
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001013 oat_file = OatFile::Open(oat_location, oat_location, NULL, !Runtime::Current()->IsCompiler(),
1014 error_msg);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001015 if (oat_file == NULL) {
Brian Carlstroma004aa92012-02-08 18:05:09 -08001016 return NULL;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001017 }
1018 return oat_file;
1019}
1020
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001021static void InitFromImageInterpretOnlyCallback(mirror::Object* obj, void* arg)
Ian Rogers848871b2013-08-05 10:56:33 -07001022 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001023 ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg);
1024
Ian Rogers848871b2013-08-05 10:56:33 -07001025 DCHECK(obj != NULL);
1026 DCHECK(class_linker != NULL);
1027
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001028 if (obj->IsArtMethod()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001029 mirror::ArtMethod* method = obj->AsArtMethod();
Ian Rogers848871b2013-08-05 10:56:33 -07001030 if (!method->IsNative()) {
1031 method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge);
1032 if (method != Runtime::Current()->GetResolutionMethod()) {
1033 method->SetEntryPointFromCompiledCode(GetCompiledCodeToInterpreterBridge());
1034 }
1035 }
1036 }
1037}
1038
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001039void ClassLinker::InitFromImage() {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001040 VLOG(startup) << "ClassLinker::InitFromImage entering";
Brian Carlstroma663ea52011-08-19 23:33:41 -07001041 CHECK(!init_done_);
1042
Mathieu Chartier590fee92013-09-13 13:46:47 -07001043 Thread* self = Thread::Current();
Ian Rogers1d54e732013-05-02 21:10:01 -07001044 gc::Heap* heap = Runtime::Current()->GetHeap();
1045 gc::space::ImageSpace* space = heap->GetImageSpace();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001046 dex_cache_image_class_lookup_required_ = true;
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001047 CHECK(space != NULL);
1048 OatFile& oat_file = GetImageOatFile(space);
1049 CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatChecksum(), 0U);
1050 CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatDataBegin(), 0U);
1051 CHECK(oat_file.GetOatHeader().GetImageFileLocation().empty());
1052 portable_resolution_trampoline_ = oat_file.GetOatHeader().GetPortableResolutionTrampoline();
1053 quick_resolution_trampoline_ = oat_file.GetOatHeader().GetQuickResolutionTrampoline();
Jeff Hao88474b42013-10-23 16:24:40 -07001054 portable_imt_conflict_trampoline_ = oat_file.GetOatHeader().GetPortableImtConflictTrampoline();
1055 quick_imt_conflict_trampoline_ = oat_file.GetOatHeader().GetQuickImtConflictTrampoline();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001056 mirror::Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
1057 mirror::ObjectArray<mirror::DexCache>* dex_caches =
1058 dex_caches_object->AsObjectArray<mirror::DexCache>();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001059
Mathieu Chartier590fee92013-09-13 13:46:47 -07001060 SirtRef<mirror::ObjectArray<mirror::Class> > class_roots(
1061 self,
1062 space->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots)->AsObjectArray<mirror::Class>());
1063 class_roots_ = class_roots.get();
Mathieu Chartier02b6a782012-10-26 13:51:26 -07001064
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001065 // Special case of setting up the String class early so that we can test arbitrary objects
1066 // as being Strings or not
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001067 mirror::String::SetClass(GetClassRoot(kJavaLangString));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001068
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001069 CHECK_EQ(oat_file.GetOatHeader().GetDexFileCount(),
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001070 static_cast<uint32_t>(dex_caches->GetLength()));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001071 for (int32_t i = 0; i < dex_caches->GetLength(); i++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001072 SirtRef<mirror::DexCache> dex_cache(self, dex_caches->Get(i));
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001073 const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8());
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001074 const OatFile::OatDexFile* oat_dex_file = oat_file.GetOatDexFile(dex_file_location.c_str(),
1075 nullptr);
Brian Carlstrom56d947f2013-07-15 13:14:23 -07001076 CHECK(oat_dex_file != NULL) << oat_file.GetLocation() << " " << dex_file_location;
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001077 std::string error_msg;
1078 const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg);
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001079 if (dex_file == NULL) {
1080 LOG(FATAL) << "Failed to open dex file " << dex_file_location
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001081 << " from within oat file " << oat_file.GetLocation()
1082 << " error '" << error_msg << "'";
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001083 }
Brian Carlstromfddf6f62012-03-15 16:56:45 -07001084
1085 CHECK_EQ(dex_file->GetLocationChecksum(), oat_dex_file->GetDexFileLocationChecksum());
1086
1087 AppendToBootClassPath(*dex_file, dex_cache);
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001088 }
1089
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001090 // Set classes on AbstractMethod early so that IsMethod tests can be performed during the live
1091 // bitmap walk.
Brian Carlstromea46f952013-07-30 01:26:50 -07001092 mirror::ArtMethod::SetClass(GetClassRoot(kJavaLangReflectArtMethod));
Anwar Ghuloumc4f105d2013-04-10 16:12:11 -07001093
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001094 // Set entry point to interpreter if in InterpretOnly mode.
1095 if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) {
Ian Rogers50b35e22012-10-04 10:09:15 -07001096 ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
Mathieu Chartier590fee92013-09-13 13:46:47 -07001097 heap->VisitObjects(InitFromImageInterpretOnlyCallback, this);
Mathieu Chartierb062fdd2012-07-03 09:51:48 -07001098 }
Brian Carlstroma663ea52011-08-19 23:33:41 -07001099
1100 // reinit class_roots_
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001101 mirror::Class::SetClassClass(class_roots->Get(kJavaLangClass));
Mathieu Chartier590fee92013-09-13 13:46:47 -07001102 class_roots_ = class_roots.get();
Brian Carlstroma663ea52011-08-19 23:33:41 -07001103
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001104 // reinit array_iftable_ from any array class instance, they should be ==
Elliott Hughes92f14b22011-10-06 12:29:54 -07001105 array_iftable_ = GetClassRoot(kObjectArrayClass)->GetIfTable();
1106 DCHECK(array_iftable_ == GetClassRoot(kBooleanArrayClass)->GetIfTable());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001107 // String class root was set above
Brian Carlstromea46f952013-07-30 01:26:50 -07001108 mirror::ArtField::SetClass(GetClassRoot(kJavaLangReflectArtField));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001109 mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass));
1110 mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass));
1111 mirror::CharArray::SetArrayClass(GetClassRoot(kCharArrayClass));
1112 mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass));
1113 mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass));
1114 mirror::IntArray::SetArrayClass(GetClassRoot(kIntArrayClass));
1115 mirror::LongArray::SetArrayClass(GetClassRoot(kLongArrayClass));
1116 mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass));
1117 mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable));
1118 mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement));
Brian Carlstroma663ea52011-08-19 23:33:41 -07001119
1120 FinishInit();
Brian Carlstrom0a5b14d2011-09-27 13:29:15 -07001121
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08001122 VLOG(startup) << "ClassLinker::InitFromImage exiting";
Brian Carlstroma663ea52011-08-19 23:33:41 -07001123}
1124
Brian Carlstroma663ea52011-08-19 23:33:41 -07001125// Keep in sync with InitCallback. Anything we visit, we need to
1126// reinit references to when reinitializing a ClassLinker from a
1127// mapped image.
Mathieu Chartierc4621982013-09-16 19:43:47 -07001128void ClassLinker::VisitRoots(RootVisitor* visitor, void* arg, bool only_dirty, bool clean_dirty) {
Mathieu Chartierb3070522013-09-17 14:18:21 -07001129 class_roots_ = down_cast<mirror::ObjectArray<mirror::Class>*>(visitor(class_roots_, arg));
Ian Rogers50b35e22012-10-04 10:09:15 -07001130 Thread* self = Thread::Current();
Elliott Hughesf8349362012-06-18 15:00:06 -07001131 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001132 ReaderMutexLock mu(self, dex_lock_);
Mathieu Chartierc4621982013-09-16 19:43:47 -07001133 if (!only_dirty || dex_caches_dirty_) {
Mathieu Chartierb3070522013-09-17 14:18:21 -07001134 for (mirror::DexCache*& dex_cache : dex_caches_) {
1135 dex_cache = down_cast<mirror::DexCache*>(visitor(dex_cache, arg));
1136 DCHECK(dex_cache != nullptr);
Mathieu Chartierc4621982013-09-16 19:43:47 -07001137 }
1138 if (clean_dirty) {
1139 dex_caches_dirty_ = false;
1140 }
Elliott Hughesf8349362012-06-18 15:00:06 -07001141 }
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001142 }
1143
Brian Carlstrom7e93b502011-08-04 14:16:22 -07001144 {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001145 WriterMutexLock mu(self, *Locks::classlinker_classes_lock_);
Mathieu Chartierc4621982013-09-16 19:43:47 -07001146 if (!only_dirty || class_table_dirty_) {
Mathieu Chartierb3070522013-09-17 14:18:21 -07001147 for (std::pair<const size_t, mirror::Class*>& it : class_table_) {
1148 it.second = down_cast<mirror::Class*>(visitor(it.second, arg));
1149 DCHECK(it.second != nullptr);
Mathieu Chartierc4621982013-09-16 19:43:47 -07001150 }
1151 if (clean_dirty) {
1152 class_table_dirty_ = false;
1153 }
Brian Carlstrom7e93b502011-08-04 14:16:22 -07001154 }
Mathieu Chartier262e5ff2012-06-01 17:35:38 -07001155
1156 // We deliberately ignore the class roots in the image since we
1157 // handle image roots by using the MS/CMS rescanning of dirty cards.
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001158 }
Brian Carlstrom7e93b502011-08-04 14:16:22 -07001159
Mathieu Chartier423d2a32013-09-12 17:33:56 -07001160 array_iftable_ = reinterpret_cast<mirror::IfTable*>(visitor(array_iftable_, arg));
1161 DCHECK(array_iftable_ != nullptr);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001162}
1163
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001164void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) {
1165 if (dex_cache_image_class_lookup_required_) {
1166 MoveImageClassesToClassTable();
Elliott Hughesa2155262011-11-16 16:26:58 -08001167 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001168 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001169 for (const std::pair<size_t, mirror::Class*>& it : class_table_) {
Mathieu Chartier02e25112013-08-14 16:14:24 -07001170 if (!visitor(it.second, arg)) {
Elliott Hughesa2155262011-11-16 16:26:58 -08001171 return;
1172 }
1173 }
1174}
1175
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001176static bool GetClassesVisitor(mirror::Class* c, void* arg) {
1177 std::set<mirror::Class*>* classes = reinterpret_cast<std::set<mirror::Class*>*>(arg);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001178 classes->insert(c);
1179 return true;
1180}
1181
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001182void ClassLinker::VisitClassesWithoutClassesLock(ClassVisitor* visitor, void* arg) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001183 std::set<mirror::Class*> classes;
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001184 VisitClasses(GetClassesVisitor, &classes);
Mathieu Chartier02e25112013-08-14 16:14:24 -07001185 for (mirror::Class* klass : classes) {
1186 if (!visitor(klass, arg)) {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001187 return;
1188 }
1189 }
1190}
1191
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001192ClassLinker::~ClassLinker() {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001193 mirror::Class::ResetClass();
1194 mirror::String::ResetClass();
Brian Carlstromea46f952013-07-30 01:26:50 -07001195 mirror::ArtField::ResetClass();
1196 mirror::ArtMethod::ResetClass();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001197 mirror::BooleanArray::ResetArrayClass();
1198 mirror::ByteArray::ResetArrayClass();
1199 mirror::CharArray::ResetArrayClass();
1200 mirror::DoubleArray::ResetArrayClass();
1201 mirror::FloatArray::ResetArrayClass();
1202 mirror::IntArray::ResetArrayClass();
1203 mirror::LongArray::ResetArrayClass();
1204 mirror::ShortArray::ResetArrayClass();
1205 mirror::Throwable::ResetClass();
1206 mirror::StackTraceElement::ResetClass();
Brian Carlstrom58ae9412011-10-04 00:56:06 -07001207 STLDeleteElements(&boot_class_path_);
1208 STLDeleteElements(&oat_files_);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001209}
1210
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001211mirror::DexCache* ClassLinker::AllocDexCache(Thread* self, const DexFile& dex_file) {
Ian Rogers1d54e732013-05-02 21:10:01 -07001212 gc::Heap* heap = Runtime::Current()->GetHeap();
Mathieu Chartier590fee92013-09-13 13:46:47 -07001213 SirtRef<mirror::Class> dex_cache_class(self, GetClassRoot(kJavaLangDexCache));
1214 SirtRef<mirror::DexCache> dex_cache(
1215 self, down_cast<mirror::DexCache*>(
Mathieu Chartiercbb2d202013-11-14 17:45:16 -08001216 heap->AllocObject<true>(self, dex_cache_class.get(), dex_cache_class->GetObjectSize())));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001217 if (dex_cache.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -07001218 return NULL;
1219 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001220 SirtRef<mirror::String>
1221 location(self, intern_table_->InternStrong(dex_file.GetLocation().c_str()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001222 if (location.get() == NULL) {
Elliott Hughes30646832011-10-13 16:59:46 -07001223 return NULL;
1224 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001225 SirtRef<mirror::ObjectArray<mirror::String> >
1226 strings(self, AllocStringArray(self, dex_file.NumStringIds()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001227 if (strings.get() == NULL) {
1228 return NULL;
1229 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001230 SirtRef<mirror::ObjectArray<mirror::Class> >
1231 types(self, AllocClassArray(self, dex_file.NumTypeIds()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001232 if (types.get() == NULL) {
1233 return NULL;
1234 }
Brian Carlstromea46f952013-07-30 01:26:50 -07001235 SirtRef<mirror::ObjectArray<mirror::ArtMethod> >
1236 methods(self, AllocArtMethodArray(self, dex_file.NumMethodIds()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001237 if (methods.get() == NULL) {
1238 return NULL;
1239 }
Brian Carlstromea46f952013-07-30 01:26:50 -07001240 SirtRef<mirror::ObjectArray<mirror::ArtField> >
1241 fields(self, AllocArtFieldArray(self, dex_file.NumFieldIds()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001242 if (fields.get() == NULL) {
1243 return NULL;
1244 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001245 SirtRef<mirror::ObjectArray<mirror::StaticStorageBase> >
Ian Rogers50b35e22012-10-04 10:09:15 -07001246 initialized_static_storage(self,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001247 AllocObjectArray<mirror::StaticStorageBase>(self, dex_file.NumTypeIds()));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001248 if (initialized_static_storage.get() == NULL) {
1249 return NULL;
1250 }
1251
Mathieu Chartier590fee92013-09-13 13:46:47 -07001252 dex_cache->Init(&dex_file, location.get(), strings.get(), types.get(), methods.get(),
1253 fields.get(), initialized_static_storage.get());
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001254 return dex_cache.get();
Brian Carlstroma0808032011-07-18 00:39:23 -07001255}
1256
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001257mirror::Class* ClassLinker::AllocClass(Thread* self, mirror::Class* java_lang_Class,
1258 size_t class_size) {
1259 DCHECK_GE(class_size, sizeof(mirror::Class));
Ian Rogers1d54e732013-05-02 21:10:01 -07001260 gc::Heap* heap = Runtime::Current()->GetHeap();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001261 mirror::Object* k =
1262 kMovingClasses ?
1263 heap->AllocObject<true>(self, java_lang_Class, class_size) :
1264 heap->AllocNonMovableObject<true>(self, java_lang_Class, class_size);
Ian Rogersa436fde2013-08-27 23:34:06 -07001265 if (UNLIKELY(k == NULL)) {
1266 CHECK(self->IsExceptionPending()); // OOME.
1267 return NULL;
1268 }
1269 mirror::Class* klass = k->AsClass();
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001270 klass->SetPrimitiveType(Primitive::kPrimNot); // Default to not being primitive.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001271 klass->SetClassSize(class_size);
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001272 klass->SetDexClassDefIndex(DexFile::kDexNoIndex16); // Default to no valid class def index.
1273 klass->SetDexTypeIndex(DexFile::kDexNoIndex16); // Default to no valid type index.
Ian Rogersa436fde2013-08-27 23:34:06 -07001274 return klass;
Brian Carlstrom75cb3b42011-07-28 02:13:36 -07001275}
1276
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001277mirror::Class* ClassLinker::AllocClass(Thread* self, size_t class_size) {
Ian Rogers50b35e22012-10-04 10:09:15 -07001278 return AllocClass(self, GetClassRoot(kJavaLangClass), class_size);
Brian Carlstroma0808032011-07-18 00:39:23 -07001279}
1280
Brian Carlstromea46f952013-07-30 01:26:50 -07001281mirror::ArtField* ClassLinker::AllocArtField(Thread* self) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001282 return down_cast<mirror::ArtField*>(
Mathieu Chartiercbb2d202013-11-14 17:45:16 -08001283 GetClassRoot(kJavaLangReflectArtField)->AllocNonMovableObject(self));
Brian Carlstroma0808032011-07-18 00:39:23 -07001284}
1285
Brian Carlstromea46f952013-07-30 01:26:50 -07001286mirror::ArtMethod* ClassLinker::AllocArtMethod(Thread* self) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001287 return down_cast<mirror::ArtMethod*>(
Mathieu Chartiercbb2d202013-11-14 17:45:16 -08001288 GetClassRoot(kJavaLangReflectArtMethod)->AllocNonMovableObject(self));
Mathieu Chartier66f19252012-09-18 08:57:04 -07001289}
1290
Mathieu Chartier590fee92013-09-13 13:46:47 -07001291mirror::ObjectArray<mirror::StackTraceElement>* ClassLinker::AllocStackTraceElementArray(
1292 Thread* self, size_t length) {
1293 return mirror::ObjectArray<mirror::StackTraceElement>::Alloc(
1294 self, GetClassRoot(kJavaLangStackTraceElementArrayClass), length);
Shih-wei Liao55df06b2011-08-26 14:39:27 -07001295}
1296
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001297static mirror::Class* EnsureResolved(Thread* self, mirror::Class* klass)
Ian Rogersb726dcb2012-09-05 08:57:23 -07001298 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001299 DCHECK(klass != NULL);
1300 // Wait for the class if it has not already been linked.
Elliott Hughes5fe594f2011-09-08 12:33:17 -07001301 if (!klass->IsResolved() && !klass->IsErroneous()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001302 SirtRef<mirror::Class> sirt_class(self, klass);
1303 ObjectLock<mirror::Class> lock(self, &sirt_class);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001304 // Check for circular dependencies between classes.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001305 if (!sirt_class->IsResolved() && sirt_class->GetClinitThreadId() == self->GetTid()) {
1306 ThrowClassCircularityError(sirt_class.get());
1307 sirt_class->SetStatus(mirror::Class::kStatusError, self);
1308 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001309 }
1310 // Wait for the pending initialization to complete.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001311 while (!sirt_class->IsResolved() && !sirt_class->IsErroneous()) {
Ian Rogers05f30572013-02-20 12:13:11 -08001312 lock.WaitIgnoringInterrupts();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001313 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001314 klass = sirt_class.get();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001315 }
1316 if (klass->IsErroneous()) {
Elliott Hughes4a2b4172011-09-20 17:08:25 -07001317 ThrowEarlierClassFailure(klass);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001318 return nullptr;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001319 }
1320 // Return the loaded class. No exceptions should be pending.
Brian Carlstromaded5f72011-10-07 17:15:04 -07001321 CHECK(klass->IsResolved()) << PrettyClass(klass);
Ian Rogers62d6c772013-02-27 08:32:07 -08001322 self->AssertNoPendingException();
Brian Carlstromaded5f72011-10-07 17:15:04 -07001323 return klass;
1324}
1325
Ian Rogersbe7149f2013-08-20 09:29:39 -07001326bool ClassLinker::IsInBootClassPath(const char* descriptor) {
1327 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
1328 return pair.second != NULL;
1329}
1330
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001331mirror::Class* ClassLinker::FindSystemClass(const char* descriptor) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001332 SirtRef<mirror::ClassLoader> class_loader(Thread::Current(), nullptr);
1333 return FindClass(descriptor, class_loader);
Elliott Hughesdb7d5e92011-12-16 18:47:37 -08001334}
1335
Mathieu Chartier590fee92013-09-13 13:46:47 -07001336mirror::Class* ClassLinker::FindClass(const char* descriptor,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001337 const SirtRef<mirror::ClassLoader>& class_loader) {
Elliott Hughesba8eee12012-01-24 20:25:24 -08001338 DCHECK_NE(*descriptor, '\0') << "descriptor is empty string";
Brian Carlstromaded5f72011-10-07 17:15:04 -07001339 Thread* self = Thread::Current();
1340 DCHECK(self != NULL);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001341 self->AssertNoPendingException();
Elliott Hughesc3b77c72011-12-15 20:56:48 -08001342 if (descriptor[1] == '\0') {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001343 // only the descriptors of primitive types should be 1 character long, also avoid class lookup
1344 // for primitive classes that aren't backed by dex files.
1345 return FindPrimitiveClass(descriptor[0]);
1346 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001347 // Find the class in the loaded classes table.
Mathieu Chartier590fee92013-09-13 13:46:47 -07001348 mirror::Class* klass = LookupClass(descriptor, class_loader.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001349 if (klass != NULL) {
Ian Rogers50b35e22012-10-04 10:09:15 -07001350 return EnsureResolved(self, klass);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001351 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001352 // Class is not yet loaded.
1353 if (descriptor[0] == '[') {
1354 return CreateArrayClass(descriptor, class_loader);
Mathieu Chartier590fee92013-09-13 13:46:47 -07001355 } else if (class_loader.get() == nullptr) {
Jesse Wilson47daf872011-11-23 11:42:45 -05001356 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_);
1357 if (pair.second != NULL) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07001358 SirtRef<mirror::ClassLoader> class_loader(self, nullptr);
1359 return DefineClass(descriptor, class_loader, *pair.first, *pair.second);
Jesse Wilson47daf872011-11-23 11:42:45 -05001360 }
Elliott Hughesb3bd5f02012-03-08 21:05:27 -08001361 } else if (Runtime::Current()->UseCompileTimeClassPath()) {
Ian Rogersbe7149f2013-08-20 09:29:39 -07001362 // First try the boot class path, we check the descriptor first to avoid an unnecessary
1363 // throw of a NoClassDefFoundError.
1364 if (IsInBootClassPath(descriptor)) {
1365 mirror::Class* system_class = FindSystemClass(descriptor);
1366 CHECK(system_class != NULL);
Jesse Wilson47daf872011-11-23 11:42:45 -05001367 return system_class;
1368 }
Ian Rogersbe7149f2013-08-20 09:29:39 -07001369 // Next try the compile time class path.
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001370 const std::vector<const DexFile*>* class_path;
1371 {
Ian Rogersbe7149f2013-08-20 09:29:39 -07001372 ScopedObjectAccessUnchecked soa(self);
Mathieu Chartier590fee92013-09-13 13:46:47 -07001373 ScopedLocalRef<jobject> jclass_loader(soa.Env(),
1374 soa.AddLocalReference<jobject>(class_loader.get()));
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001375 class_path = &Runtime::Current()->GetCompileTimeClassPath(jclass_loader.get());
1376 }
1377
1378 DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, *class_path);
Jesse Wilson47daf872011-11-23 11:42:45 -05001379 if (pair.second != NULL) {
1380 return DefineClass(descriptor, class_loader, *pair.first, *pair.second);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001381 }
Jesse Wilson47daf872011-11-23 11:42:45 -05001382
1383 } else {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001384 ScopedObjectAccessUnchecked soa(self->GetJniEnv());
1385 ScopedLocalRef<jobject> class_loader_object(soa.Env(),
Mathieu Chartier590fee92013-09-13 13:46:47 -07001386 soa.AddLocalReference<jobject>(class_loader.get()));
Elliott Hughes95572412011-12-13 18:14:20 -08001387 std::string class_name_string(DescriptorToDot(descriptor));
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001388 ScopedLocalRef<jobject> result(soa.Env(), NULL);
Ian Rogers365c1022012-06-22 15:05:28 -07001389 {
1390 ScopedThreadStateChange tsc(self, kNative);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001391 ScopedLocalRef<jobject> class_name_object(soa.Env(),
1392 soa.Env()->NewStringUTF(class_name_string.c_str()));
Ian Rogers365c1022012-06-22 15:05:28 -07001393 if (class_name_object.get() == NULL) {
1394 return NULL;
1395 }
1396 CHECK(class_loader_object.get() != NULL);
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001397 result.reset(soa.Env()->CallObjectMethod(class_loader_object.get(),
1398 WellKnownClasses::java_lang_ClassLoader_loadClass,
1399 class_name_object.get()));
Jesse Wilson47daf872011-11-23 11:42:45 -05001400 }
Ian Rogers62d6c772013-02-27 08:32:07 -08001401 if (soa.Self()->IsExceptionPending()) {
Elliott Hughes748382f2012-01-26 18:07:38 -08001402 // If the ClassLoader threw, pass that exception up.
1403 return NULL;
Ian Rogers761bfa82012-01-11 10:14:05 -08001404 } else if (result.get() == NULL) {
Ian Rogerscab01012012-01-10 17:35:46 -08001405 // broken loader - throw NPE to be compatible with Dalvik
Ian Rogers62d6c772013-02-27 08:32:07 -08001406 ThrowNullPointerException(NULL, StringPrintf("ClassLoader.loadClass returned null for %s",
1407 class_name_string.c_str()).c_str());
Ian Rogerscab01012012-01-10 17:35:46 -08001408 return NULL;
Ian Rogers761bfa82012-01-11 10:14:05 -08001409 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001410 // success, return mirror::Class*
1411 return soa.Decode<mirror::Class*>(result.get());
Ian Rogers6b0870d2011-12-15 19:38:12 -08001412 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001413 }
1414
Elliott Hughes82914b62012-04-09 15:56:29 -07001415 ThrowNoClassDefFoundError("Class %s not found", PrintableString(descriptor).c_str());
Jesse Wilson47daf872011-11-23 11:42:45 -05001416 return NULL;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001417}
1418
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001419mirror::Class* ClassLinker::DefineClass(const char* descriptor,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001420 const SirtRef<mirror::ClassLoader>& class_loader,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001421 const DexFile& dex_file,
1422 const DexFile::ClassDef& dex_class_def) {
Ian Rogers1f539342012-10-03 21:09:42 -07001423 Thread* self = Thread::Current();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001424 SirtRef<mirror::Class> klass(self, NULL);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001425 // Load the class from the dex file.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001426 if (UNLIKELY(!init_done_)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001427 // finish up init of hand crafted class_roots_
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001428 if (strcmp(descriptor, "Ljava/lang/Object;") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001429 klass.reset(GetClassRoot(kJavaLangObject));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001430 } else if (strcmp(descriptor, "Ljava/lang/Class;") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001431 klass.reset(GetClassRoot(kJavaLangClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001432 } else if (strcmp(descriptor, "Ljava/lang/String;") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001433 klass.reset(GetClassRoot(kJavaLangString));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001434 } else if (strcmp(descriptor, "Ljava/lang/DexCache;") == 0) {
Mathieu Chartier66f19252012-09-18 08:57:04 -07001435 klass.reset(GetClassRoot(kJavaLangDexCache));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001436 } else if (strcmp(descriptor, "Ljava/lang/reflect/ArtField;") == 0) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001437 klass.reset(GetClassRoot(kJavaLangReflectArtField));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001438 } else if (strcmp(descriptor, "Ljava/lang/reflect/ArtMethod;") == 0) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001439 klass.reset(GetClassRoot(kJavaLangReflectArtMethod));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001440 } else {
Ian Rogers50b35e22012-10-04 10:09:15 -07001441 klass.reset(AllocClass(self, SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001442 }
1443 } else {
Ian Rogers50b35e22012-10-04 10:09:15 -07001444 klass.reset(AllocClass(self, SizeOfClass(dex_file, dex_class_def)));
Brian Carlstromaded5f72011-10-07 17:15:04 -07001445 }
Ian Rogersa436fde2013-08-27 23:34:06 -07001446 if (UNLIKELY(klass.get() == NULL)) {
1447 CHECK(self->IsExceptionPending()); // Expect an OOME.
1448 return NULL;
1449 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001450 klass->SetDexCache(FindDexCache(dex_file));
Mathieu Chartier590fee92013-09-13 13:46:47 -07001451 LoadClass(dex_file, dex_class_def, klass, class_loader.get());
Brian Carlstromaded5f72011-10-07 17:15:04 -07001452 // Check for a pending exception during load
Brian Carlstromaded5f72011-10-07 17:15:04 -07001453 if (self->IsExceptionPending()) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001454 klass->SetStatus(mirror::Class::kStatusError, self);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001455 return NULL;
1456 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001457 ObjectLock<mirror::Class> lock(self, &klass);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001458 klass->SetClinitThreadId(self->GetTid());
Mathieu Chartier590fee92013-09-13 13:46:47 -07001459 // Add the newly loaded class to the loaded classes table.
1460 mirror::Class* existing = InsertClass(descriptor, klass.get(), Hash(descriptor));
1461 if (existing != NULL) {
1462 // We failed to insert because we raced with another thread. Calling EnsureResolved may cause
1463 // this thread to block.
1464 return EnsureResolved(self, existing);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001465 }
1466 // Finish loading (if necessary) by finding parents
1467 CHECK(!klass->IsLoaded());
1468 if (!LoadSuperAndInterfaces(klass, dex_file)) {
1469 // Loading failed.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001470 klass->SetStatus(mirror::Class::kStatusError, self);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001471 return NULL;
1472 }
1473 CHECK(klass->IsLoaded());
1474 // Link the class (if necessary)
1475 CHECK(!klass->IsResolved());
Mathieu Chartier590fee92013-09-13 13:46:47 -07001476 // TODO: Use fast jobjects?
1477 SirtRef<mirror::ObjectArray<mirror::Class> > interfaces(self, nullptr);
1478 if (!LinkClass(self, klass, interfaces)) {
Brian Carlstromaded5f72011-10-07 17:15:04 -07001479 // Linking failed.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001480 klass->SetStatus(mirror::Class::kStatusError, self);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001481 return NULL;
1482 }
1483 CHECK(klass->IsResolved());
Elliott Hughes4740cdf2011-12-07 14:07:12 -08001484
1485 /*
1486 * We send CLASS_PREPARE events to the debugger from here. The
1487 * definition of "preparation" is creating the static fields for a
1488 * class and initializing them to the standard default values, but not
1489 * executing any code (that comes later, during "initialization").
1490 *
1491 * We did the static preparation in LinkClass.
1492 *
1493 * The class has been prepared and resolved but possibly not yet verified
1494 * at this point.
1495 */
1496 Dbg::PostClassPrepare(klass.get());
1497
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001498 return klass.get();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07001499}
1500
Brian Carlstrom4873d462011-08-21 15:23:39 -07001501// Precomputes size that will be needed for Class, matching LinkStaticFields
1502size_t ClassLinker::SizeOfClass(const DexFile& dex_file,
1503 const DexFile::ClassDef& dex_class_def) {
1504 const byte* class_data = dex_file.GetClassData(dex_class_def);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001505 size_t num_ref = 0;
1506 size_t num_32 = 0;
1507 size_t num_64 = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07001508 if (class_data != NULL) {
1509 for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) {
1510 const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07001511 const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001512 char c = descriptor[0];
1513 if (c == 'L' || c == '[') {
1514 num_ref++;
1515 } else if (c == 'J' || c == 'D') {
1516 num_64++;
1517 } else {
1518 num_32++;
1519 }
1520 }
1521 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07001522 // start with generic class data
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001523 size_t size = sizeof(mirror::Class);
Brian Carlstrom4873d462011-08-21 15:23:39 -07001524 // follow with reference fields which must be contiguous at start
1525 size += (num_ref * sizeof(uint32_t));
1526 // if there are 64-bit fields to add, make sure they are aligned
Brian Carlstrom7934ac22013-07-26 10:54:15 -07001527 if (num_64 != 0 && size != RoundUp(size, 8)) { // for 64-bit alignment
Brian Carlstrom4873d462011-08-21 15:23:39 -07001528 if (num_32 != 0) {
1529 // use an available 32-bit field for padding
1530 num_32--;
1531 }
1532 size += sizeof(uint32_t); // either way, we are adding a word
1533 DCHECK_EQ(size, RoundUp(size, 8));
1534 }
1535 // tack on any 64-bit fields now that alignment is assured
1536 size += (num_64 * sizeof(uint64_t));
1537 // tack on any remaining 32-bit fields
1538 size += (num_32 * sizeof(uint32_t));
1539 return size;
1540}
1541
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001542const OatFile::OatClass* ClassLinker::GetOatClass(const DexFile& dex_file, uint16_t class_def_idx) {
1543 DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16);
Ian Rogers19846512012-02-24 11:42:47 -08001544 const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001545 CHECK(oat_file != NULL) << dex_file.GetLocation();
Brian Carlstrom756ee4e2013-10-03 15:46:12 -07001546 uint dex_location_checksum = dex_file.GetLocationChecksum();
Ian Rogers8d31bbd2013-10-13 10:44:14 -07001547 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation().c_str(),
Brian Carlstrom756ee4e2013-10-03 15:46:12 -07001548 &dex_location_checksum);
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001549 CHECK(oat_dex_file != NULL) << dex_file.GetLocation();
1550 const OatFile::OatClass* oat_class = oat_dex_file->GetOatClass(class_def_idx);
1551 CHECK(oat_class != NULL) << dex_file.GetLocation() << " " << class_def_idx;
Ian Rogers19846512012-02-24 11:42:47 -08001552 return oat_class;
1553}
1554
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001555static uint32_t GetOatMethodIndexFromMethodIndex(const DexFile& dex_file, uint16_t class_def_idx,
1556 uint32_t method_idx) {
1557 const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx);
1558 const byte* class_data = dex_file.GetClassData(class_def);
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001559 CHECK(class_data != NULL);
1560 ClassDataItemIterator it(dex_file, class_data);
1561 // Skip fields
1562 while (it.HasNextStaticField()) {
1563 it.Next();
1564 }
1565 while (it.HasNextInstanceField()) {
1566 it.Next();
1567 }
1568 // Process methods
1569 size_t class_def_method_index = 0;
1570 while (it.HasNextDirectMethod()) {
1571 if (it.GetMemberIndex() == method_idx) {
1572 return class_def_method_index;
1573 }
1574 class_def_method_index++;
1575 it.Next();
1576 }
1577 while (it.HasNextVirtualMethod()) {
1578 if (it.GetMemberIndex() == method_idx) {
1579 return class_def_method_index;
1580 }
1581 class_def_method_index++;
1582 it.Next();
1583 }
1584 DCHECK(!it.HasNext());
1585 LOG(FATAL) << "Failed to find method index " << method_idx << " in " << dex_file.GetLocation();
1586 return 0;
1587}
1588
Brian Carlstromea46f952013-07-30 01:26:50 -07001589const OatFile::OatMethod ClassLinker::GetOatMethodFor(const mirror::ArtMethod* method) {
Ian Rogers19846512012-02-24 11:42:47 -08001590 // Although we overwrite the trampoline of non-static methods, we may get here via the resolution
Ian Rogersfb6adba2012-03-04 21:51:51 -08001591 // method for direct methods (or virtual methods made direct).
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001592 mirror::Class* declaring_class = method->GetDeclaringClass();
Ian Rogersfb6adba2012-03-04 21:51:51 -08001593 size_t oat_method_index;
1594 if (method->IsStatic() || method->IsDirect()) {
1595 // Simple case where the oat method index was stashed at load time.
1596 oat_method_index = method->GetMethodIndex();
1597 } else {
1598 // We're invoking a virtual method directly (thanks to sharpening), compute the oat_method_index
1599 // by search for its position in the declared virtual methods.
1600 oat_method_index = declaring_class->NumDirectMethods();
1601 size_t end = declaring_class->NumVirtualMethods();
1602 bool found = false;
1603 for (size_t i = 0; i < end; i++) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001604 if (declaring_class->GetVirtualMethod(i) == method) {
1605 found = true;
1606 break;
1607 }
Ian Rogersf320b632012-03-13 18:47:47 -07001608 oat_method_index++;
Ian Rogersfb6adba2012-03-04 21:51:51 -08001609 }
1610 CHECK(found) << "Didn't find oat method index for virtual method: " << PrettyMethod(method);
1611 }
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001612 UniquePtr<const OatFile::OatClass>
1613 oat_class(GetOatClass(*declaring_class->GetDexCache()->GetDexFile(),
1614 declaring_class->GetDexClassDefIndex()));
Brian Carlstromf5822582012-03-19 22:34:31 -07001615 CHECK(oat_class.get() != NULL);
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001616 DCHECK_EQ(oat_method_index,
1617 GetOatMethodIndexFromMethodIndex(*declaring_class->GetDexCache()->GetDexFile(),
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001618 method->GetDeclaringClass()->GetDexClassDefIndex(),
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001619 method->GetDexMethodIndex()));
1620
TDYa12785321912012-04-01 15:24:56 -07001621 return oat_class->GetOatMethod(oat_method_index);
1622}
1623
1624// Special case to get oat code without overwriting a trampoline.
Brian Carlstromea46f952013-07-30 01:26:50 -07001625const void* ClassLinker::GetOatCodeFor(const mirror::ArtMethod* method) {
Ian Rogers62d6c772013-02-27 08:32:07 -08001626 CHECK(!method->IsAbstract()) << PrettyMethod(method);
Jeff Hao8df6cea2013-07-29 13:54:48 -07001627 if (method->IsProxyMethod()) {
1628#if !defined(ART_USE_PORTABLE_COMPILER)
1629 return reinterpret_cast<void*>(art_quick_proxy_invoke_handler);
1630#else
1631 return reinterpret_cast<void*>(art_portable_proxy_invoke_handler);
1632#endif
1633 }
Ian Rogersf3e98552013-03-20 15:49:49 -07001634 const void* result = GetOatMethodFor(method).GetCode();
1635 if (result == NULL) {
1636 // No code? You must mean to go into the interpreter.
Ian Rogers848871b2013-08-05 10:56:33 -07001637 result = GetCompiledCodeToInterpreterBridge();
Ian Rogersf3e98552013-03-20 15:49:49 -07001638 }
1639 return result;
TDYa12785321912012-04-01 15:24:56 -07001640}
1641
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001642const void* ClassLinker::GetOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx,
1643 uint32_t method_idx) {
1644 UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(dex_file, class_def_idx));
1645 CHECK(oat_class.get() != nullptr);
1646 uint32_t oat_method_idx = GetOatMethodIndexFromMethodIndex(dex_file, class_def_idx, method_idx);
Mathieu Chartiere35517a2012-10-30 18:49:55 -07001647 return oat_class->GetOatMethod(oat_method_idx).GetCode();
1648}
1649
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001650// Returns true if the method must run with interpreter, false otherwise.
Brian Carlstromea46f952013-07-30 01:26:50 -07001651static bool NeedsInterpreter(const mirror::ArtMethod* method, const void* code) {
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001652 if (code == NULL) {
1653 // No code: need interpreter.
1654 return true;
1655 }
Dragos Sbirlea90af14d2013-08-15 17:50:16 -07001656#ifdef ART_SEA_IR_MODE
1657 ScopedObjectAccess soa(Thread::Current());
1658 if (std::string::npos != PrettyMethod(method).find("fibonacci")) {
1659 LOG(INFO) << "Found " << PrettyMethod(method);
1660 return false;
1661 }
1662#endif
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001663 // If interpreter mode is enabled, every method (except native and proxy) must
1664 // be run with interpreter.
1665 return Runtime::Current()->GetInstrumentation()->InterpretOnly() &&
1666 !method->IsNative() && !method->IsProxyMethod();
1667}
1668
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001669void ClassLinker::FixupStaticTrampolines(mirror::Class* klass) {
Ian Rogers1c829822013-09-30 18:18:50 -07001670 if (klass->NumDirectMethods() == 0) {
1671 return; // No direct methods => no static methods.
Ian Rogers19846512012-02-24 11:42:47 -08001672 }
Ian Rogers62d6c772013-02-27 08:32:07 -08001673 Runtime* runtime = Runtime::Current();
1674 if (!runtime->IsStarted() || runtime->UseCompileTimeClassPath()) {
Ian Rogers1c829822013-09-30 18:18:50 -07001675 return; // OAT file unavailable.
Ian Rogers19846512012-02-24 11:42:47 -08001676 }
Ian Rogers1c829822013-09-30 18:18:50 -07001677 ClassHelper kh(klass);
1678 const DexFile& dex_file = kh.GetDexFile();
1679 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
1680 CHECK(dex_class_def != nullptr);
1681 const byte* class_data = dex_file.GetClassData(*dex_class_def);
1682 // There should always be class data if there were direct methods.
1683 CHECK(class_data != nullptr) << PrettyDescriptor(klass);
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001684 UniquePtr<const OatFile::OatClass> oat_class(GetOatClass(dex_file, klass->GetDexClassDefIndex()));
Ian Rogers1c829822013-09-30 18:18:50 -07001685 CHECK(oat_class.get() != nullptr);
Ian Rogers19846512012-02-24 11:42:47 -08001686 ClassDataItemIterator it(dex_file, class_data);
1687 // Skip fields
1688 while (it.HasNextStaticField()) {
1689 it.Next();
1690 }
1691 while (it.HasNextInstanceField()) {
1692 it.Next();
1693 }
Ian Rogers1c829822013-09-30 18:18:50 -07001694 // Link the code of methods skipped by LinkCode.
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001695 for (size_t method_index = 0; it.HasNextDirectMethod(); ++method_index, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001696 mirror::ArtMethod* method = klass->GetDirectMethod(method_index);
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001697 if (!method->IsStatic()) {
1698 // Only update static methods.
1699 continue;
Ian Rogers19846512012-02-24 11:42:47 -08001700 }
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001701 const void* code = oat_class->GetOatMethod(method_index).GetCode();
1702 const bool enter_interpreter = NeedsInterpreter(method, code);
1703 if (enter_interpreter) {
1704 // Use interpreter entry point.
Ian Rogers848871b2013-08-05 10:56:33 -07001705 code = GetCompiledCodeToInterpreterBridge();
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001706 }
1707 runtime->GetInstrumentation()->UpdateMethodsCode(method, code);
Ian Rogers19846512012-02-24 11:42:47 -08001708 }
Ian Rogers62d6c772013-02-27 08:32:07 -08001709 // Ignore virtual methods on the iterator.
Ian Rogers19846512012-02-24 11:42:47 -08001710}
1711
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001712static void LinkCode(const SirtRef<mirror::ArtMethod>& method, const OatFile::OatClass* oat_class,
Ian Rogers00f7d0e2012-07-19 15:28:27 -07001713 uint32_t method_index)
Ian Rogersb726dcb2012-09-05 08:57:23 -07001714 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers62d6c772013-02-27 08:32:07 -08001715 // Method shouldn't have already been linked.
Jeff Haoaa4a7932013-05-13 11:28:27 -07001716 DCHECK(method->GetEntryPointFromCompiledCode() == NULL);
Brian Carlstrom92827a52011-10-10 15:50:01 -07001717 // Every kind of method should at least get an invoke stub from the oat_method.
1718 // non-abstract methods also get their code pointers.
1719 const OatFile::OatMethod oat_method = oat_class->GetOatMethod(method_index);
Brian Carlstrom265091e2013-01-30 14:08:26 -08001720 oat_method.LinkMethod(method.get());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001721
Jeff Hao16743632013-05-08 10:59:04 -07001722 // Install entry point from interpreter.
Jeff Hao790ad902013-05-22 15:02:08 -07001723 Runtime* runtime = Runtime::Current();
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001724 bool enter_interpreter = NeedsInterpreter(method.get(), method->GetEntryPointFromCompiledCode());
Jeff Hao0aba0ba2013-06-03 14:49:28 -07001725 if (enter_interpreter) {
Ian Rogers848871b2013-08-05 10:56:33 -07001726 method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge);
Jeff Hao16743632013-05-08 10:59:04 -07001727 } else {
Dragos Sbirlea08bf1962013-08-12 08:53:04 -07001728 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Jeff Hao16743632013-05-08 10:59:04 -07001729 }
1730
Brian Carlstrom92827a52011-10-10 15:50:01 -07001731 if (method->IsAbstract()) {
Ian Rogers848871b2013-08-05 10:56:33 -07001732 method->SetEntryPointFromCompiledCode(GetCompiledCodeToInterpreterBridge());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001733 return;
1734 }
Ian Rogers19846512012-02-24 11:42:47 -08001735
1736 if (method->IsStatic() && !method->IsConstructor()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08001737 // For static methods excluding the class initializer, install the trampoline.
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001738 // It will be replaced by the proper entry point by ClassLinker::FixupStaticTrampolines
1739 // after initializing class (see ClassLinker::InitializeClass method).
Jeff Hao0aba0ba2013-06-03 14:49:28 -07001740 method->SetEntryPointFromCompiledCode(GetResolutionTrampoline(runtime->GetClassLinker()));
Sebastien Hertz7d658cf2013-07-09 10:56:11 +02001741 } else if (enter_interpreter) {
1742 // Set entry point from compiled code if there's no code or in interpreter only mode.
Ian Rogers848871b2013-08-05 10:56:33 -07001743 method->SetEntryPointFromCompiledCode(GetCompiledCodeToInterpreterBridge());
Ian Rogers0d6de042012-02-29 08:50:26 -08001744 }
jeffhao26c0a1a2012-01-17 16:28:33 -08001745
Ian Rogers62d6c772013-02-27 08:32:07 -08001746 if (method->IsNative()) {
1747 // Unregistering restores the dlsym lookup stub.
1748 method->UnregisterNative(Thread::Current());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001749 }
Ian Rogersf3e98552013-03-20 15:49:49 -07001750
Ian Rogers62d6c772013-02-27 08:32:07 -08001751 // Allow instrumentation its chance to hijack code.
Jeff Haoaa4a7932013-05-13 11:28:27 -07001752 runtime->GetInstrumentation()->UpdateMethodsCode(method.get(),
1753 method->GetEntryPointFromCompiledCode());
Brian Carlstrom92827a52011-10-10 15:50:01 -07001754}
1755
Brian Carlstromf615a612011-07-23 12:50:34 -07001756void ClassLinker::LoadClass(const DexFile& dex_file,
1757 const DexFile::ClassDef& dex_class_def,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001758 const SirtRef<mirror::Class>& klass,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001759 mirror::ClassLoader* class_loader) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001760 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001761 CHECK(klass->GetDexCache() != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001762 CHECK_EQ(mirror::Class::kStatusNotReady, klass->GetStatus());
Brian Carlstromf615a612011-07-23 12:50:34 -07001763 const char* descriptor = dex_file.GetClassDescriptor(dex_class_def);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001764 CHECK(descriptor != NULL);
1765
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001766 klass->SetClass(GetClassRoot(kJavaLangClass));
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001767 uint32_t access_flags = dex_class_def.access_flags_;
Elliott Hughes582a7d12011-10-10 18:38:42 -07001768 // Make sure that none of our runtime-only flags are set.
Brian Carlstrom8e3fb142013-10-09 21:00:27 -07001769 CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001770 klass->SetAccessFlags(access_flags);
1771 klass->SetClassLoader(class_loader);
Ian Rogersc2b44472011-12-14 21:17:17 -08001772 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07001773 klass->SetStatus(mirror::Class::kStatusIdx, NULL);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001774
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001775 klass->SetDexClassDefIndex(dex_file.GetIndexForClassDef(dex_class_def));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001776 klass->SetDexTypeIndex(dex_class_def.class_idx_);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001777
Ian Rogers0571d352011-11-03 19:51:38 -07001778 // Load fields fields.
1779 const byte* class_data = dex_file.GetClassData(dex_class_def);
1780 if (class_data == NULL) {
1781 return; // no fields or methods - for example a marker interface
Brian Carlstrom934486c2011-07-12 23:42:50 -07001782 }
Ian Rogers0571d352011-11-03 19:51:38 -07001783 ClassDataItemIterator it(dex_file, class_data);
Ian Rogers50b35e22012-10-04 10:09:15 -07001784 Thread* self = Thread::Current();
Ian Rogers0571d352011-11-03 19:51:38 -07001785 if (it.NumStaticFields() != 0) {
Ian Rogersa436fde2013-08-27 23:34:06 -07001786 mirror::ObjectArray<mirror::ArtField>* statics = AllocArtFieldArray(self, it.NumStaticFields());
1787 if (UNLIKELY(statics == NULL)) {
1788 CHECK(self->IsExceptionPending()); // OOME.
1789 return;
1790 }
1791 klass->SetSFields(statics);
Ian Rogers0571d352011-11-03 19:51:38 -07001792 }
1793 if (it.NumInstanceFields() != 0) {
Ian Rogersa436fde2013-08-27 23:34:06 -07001794 mirror::ObjectArray<mirror::ArtField>* fields =
1795 AllocArtFieldArray(self, it.NumInstanceFields());
1796 if (UNLIKELY(fields == NULL)) {
1797 CHECK(self->IsExceptionPending()); // OOME.
1798 return;
1799 }
1800 klass->SetIFields(fields);
Ian Rogers0571d352011-11-03 19:51:38 -07001801 }
1802 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001803 SirtRef<mirror::ArtField> sfield(self, AllocArtField(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07001804 if (UNLIKELY(sfield.get() == NULL)) {
1805 CHECK(self->IsExceptionPending()); // OOME.
1806 return;
1807 }
Ian Rogers0571d352011-11-03 19:51:38 -07001808 klass->SetStaticField(i, sfield.get());
1809 LoadField(dex_file, it, klass, sfield);
1810 }
1811 for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001812 SirtRef<mirror::ArtField> ifield(self, AllocArtField(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07001813 if (UNLIKELY(ifield.get() == NULL)) {
1814 CHECK(self->IsExceptionPending()); // OOME.
1815 return;
1816 }
Ian Rogers0571d352011-11-03 19:51:38 -07001817 klass->SetInstanceField(i, ifield.get());
1818 LoadField(dex_file, it, klass, ifield);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001819 }
1820
Brian Carlstromf5822582012-03-19 22:34:31 -07001821 UniquePtr<const OatFile::OatClass> oat_class;
1822 if (Runtime::Current()->IsStarted() && !Runtime::Current()->UseCompileTimeClassPath()) {
Ian Rogers8b2c0b92013-09-19 02:56:49 -07001823 oat_class.reset(GetOatClass(dex_file, klass->GetDexClassDefIndex()));
Brian Carlstromf5822582012-03-19 22:34:31 -07001824 }
Ian Rogers19846512012-02-24 11:42:47 -08001825
Ian Rogers0571d352011-11-03 19:51:38 -07001826 // Load methods.
1827 if (it.NumDirectMethods() != 0) {
Brian Carlstrom934486c2011-07-12 23:42:50 -07001828 // TODO: append direct methods to class object
Ian Rogersa436fde2013-08-27 23:34:06 -07001829 mirror::ObjectArray<mirror::ArtMethod>* directs =
1830 AllocArtMethodArray(self, it.NumDirectMethods());
1831 if (UNLIKELY(directs == NULL)) {
1832 CHECK(self->IsExceptionPending()); // OOME.
1833 return;
1834 }
1835 klass->SetDirectMethods(directs);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001836 }
Ian Rogers0571d352011-11-03 19:51:38 -07001837 if (it.NumVirtualMethods() != 0) {
1838 // TODO: append direct methods to class object
Ian Rogersa436fde2013-08-27 23:34:06 -07001839 mirror::ObjectArray<mirror::ArtMethod>* virtuals =
1840 AllocArtMethodArray(self, it.NumVirtualMethods());
1841 if (UNLIKELY(virtuals == NULL)) {
1842 CHECK(self->IsExceptionPending()); // OOME.
1843 return;
1844 }
1845 klass->SetVirtualMethods(virtuals);
Brian Carlstrom934486c2011-07-12 23:42:50 -07001846 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001847 size_t class_def_method_index = 0;
Ian Rogers0571d352011-11-03 19:51:38 -07001848 for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001849 SirtRef<mirror::ArtMethod> method(self, LoadMethod(self, dex_file, it, klass));
Ian Rogersa436fde2013-08-27 23:34:06 -07001850 if (UNLIKELY(method.get() == NULL)) {
1851 CHECK(self->IsExceptionPending()); // OOME.
1852 return;
1853 }
Ian Rogers0571d352011-11-03 19:51:38 -07001854 klass->SetDirectMethod(i, method.get());
Ian Rogers0571d352011-11-03 19:51:38 -07001855 if (oat_class.get() != NULL) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001856 LinkCode(method, oat_class.get(), class_def_method_index);
Ian Rogers0571d352011-11-03 19:51:38 -07001857 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001858 method->SetMethodIndex(class_def_method_index);
1859 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07001860 }
1861 for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07001862 SirtRef<mirror::ArtMethod> method(self, LoadMethod(self, dex_file, it, klass));
Ian Rogersa436fde2013-08-27 23:34:06 -07001863 if (UNLIKELY(method.get() == NULL)) {
1864 CHECK(self->IsExceptionPending()); // OOME.
1865 return;
1866 }
Ian Rogers0571d352011-11-03 19:51:38 -07001867 klass->SetVirtualMethod(i, method.get());
Ian Rogersfb6adba2012-03-04 21:51:51 -08001868 DCHECK_EQ(class_def_method_index, it.NumDirectMethods() + i);
Ian Rogers0571d352011-11-03 19:51:38 -07001869 if (oat_class.get() != NULL) {
Ian Rogersfb6adba2012-03-04 21:51:51 -08001870 LinkCode(method, oat_class.get(), class_def_method_index);
Ian Rogers0571d352011-11-03 19:51:38 -07001871 }
Ian Rogersfb6adba2012-03-04 21:51:51 -08001872 class_def_method_index++;
Ian Rogers0571d352011-11-03 19:51:38 -07001873 }
1874 DCHECK(!it.HasNext());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001875}
1876
Elliott Hughes1bac54f2012-03-16 12:48:31 -07001877void ClassLinker::LoadField(const DexFile& /*dex_file*/, const ClassDataItemIterator& it,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001878 const SirtRef<mirror::Class>& klass,
1879 const SirtRef<mirror::ArtField>& dst) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08001880 uint32_t field_idx = it.GetMemberIndex();
1881 dst->SetDexFieldIndex(field_idx);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001882 dst->SetDeclaringClass(klass.get());
Ian Rogers0571d352011-11-03 19:51:38 -07001883 dst->SetAccessFlags(it.GetMemberAccessFlags());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001884}
1885
Brian Carlstromea46f952013-07-30 01:26:50 -07001886mirror::ArtMethod* ClassLinker::LoadMethod(Thread* self, const DexFile& dex_file,
Ian Rogersa436fde2013-08-27 23:34:06 -07001887 const ClassDataItemIterator& it,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001888 const SirtRef<mirror::Class>& klass) {
Ian Rogers19846512012-02-24 11:42:47 -08001889 uint32_t dex_method_idx = it.GetMemberIndex();
Ian Rogers19846512012-02-24 11:42:47 -08001890 const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
Ian Rogersdfb325e2013-10-30 01:00:44 -07001891 const char* method_name = dex_file.StringDataByIdx(method_id.name_idx_);
Mathieu Chartier66f19252012-09-18 08:57:04 -07001892
Brian Carlstromea46f952013-07-30 01:26:50 -07001893 mirror::ArtMethod* dst = AllocArtMethod(self);
Ian Rogersa436fde2013-08-27 23:34:06 -07001894 if (UNLIKELY(dst == NULL)) {
1895 CHECK(self->IsExceptionPending()); // OOME.
1896 return NULL;
1897 }
Brian Carlstromea46f952013-07-30 01:26:50 -07001898 DCHECK(dst->IsArtMethod()) << PrettyDescriptor(dst->GetClass());
Mathieu Chartier66f19252012-09-18 08:57:04 -07001899
Ian Rogers50b35e22012-10-04 10:09:15 -07001900 const char* old_cause = self->StartAssertNoThreadSuspension("LoadMethod");
Mathieu Chartier66f19252012-09-18 08:57:04 -07001901 dst->SetDexMethodIndex(dex_method_idx);
1902 dst->SetDeclaringClass(klass.get());
Ian Rogers0571d352011-11-03 19:51:38 -07001903 dst->SetCodeItemOffset(it.GetMethodCodeItemOffset());
Brian Carlstrom934486c2011-07-12 23:42:50 -07001904
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001905 dst->SetDexCacheStrings(klass->GetDexCache()->GetStrings());
Ian Rogers19846512012-02-24 11:42:47 -08001906 dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001907 dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07001908 dst->SetDexCacheInitializedStaticStorage(klass->GetDexCache()->GetInitializedStaticStorage());
Mathieu Chartier66f19252012-09-18 08:57:04 -07001909
Ian Rogers241b5de2013-10-09 17:58:57 -07001910 uint32_t access_flags = it.GetMemberAccessFlags();
1911
Ian Rogersdfb325e2013-10-30 01:00:44 -07001912 if (UNLIKELY(strcmp("finalize", method_name) == 0)) {
Ian Rogers241b5de2013-10-09 17:58:57 -07001913 // Set finalizable flag on declaring class.
Ian Rogersdfb325e2013-10-30 01:00:44 -07001914 if (strcmp("V", dex_file.GetShorty(method_id.proto_idx_)) == 0) {
1915 // Void return type.
1916 if (klass->GetClassLoader() != NULL) { // All non-boot finalizer methods are flagged
1917 klass->SetFinalizable();
1918 } else {
1919 ClassHelper kh(klass.get());
1920 const char* klass_descriptor = kh.GetDescriptor();
1921 // The Enum class declares a "final" finalize() method to prevent subclasses from
1922 // introducing a finalizer. We don't want to set the finalizable flag for Enum or its
1923 // subclasses, so we exclude it here.
1924 // We also want to avoid setting the flag on Object, where we know that finalize() is
1925 // empty.
1926 if ((strcmp("Ljava/lang/Object;", klass_descriptor) != 0) &&
1927 (strcmp("Ljava/lang/Enum;", klass_descriptor) != 0)) {
Ian Rogers241b5de2013-10-09 17:58:57 -07001928 klass->SetFinalizable();
Ian Rogers241b5de2013-10-09 17:58:57 -07001929 }
1930 }
1931 }
1932 } else if (method_name[0] == '<') {
1933 // Fix broken access flags for initializers. Bug 11157540.
Ian Rogersdfb325e2013-10-30 01:00:44 -07001934 bool is_init = (strcmp("<init>", method_name) == 0);
1935 bool is_clinit = !is_init && (strcmp("<clinit>", method_name) == 0);
Ian Rogers241b5de2013-10-09 17:58:57 -07001936 if (UNLIKELY(!is_init && !is_clinit)) {
1937 LOG(WARNING) << "Unexpected '<' at start of method name " << method_name;
1938 } else {
1939 if (UNLIKELY((access_flags & kAccConstructor) == 0)) {
1940 LOG(WARNING) << method_name << " didn't have expected constructor access flag in class "
1941 << PrettyDescriptor(klass.get()) << " in dex file " << dex_file.GetLocation();
1942 access_flags |= kAccConstructor;
1943 }
1944 }
1945 }
1946 dst->SetAccessFlags(access_flags);
Mathieu Chartier66f19252012-09-18 08:57:04 -07001947
Ian Rogers50b35e22012-10-04 10:09:15 -07001948 self->EndAssertNoThreadSuspension(old_cause);
Mathieu Chartier66f19252012-09-18 08:57:04 -07001949 return dst;
Brian Carlstrom934486c2011-07-12 23:42:50 -07001950}
1951
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001952void ClassLinker::AppendToBootClassPath(const DexFile& dex_file) {
Ian Rogers50b35e22012-10-04 10:09:15 -07001953 Thread* self = Thread::Current();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08001954 SirtRef<mirror::DexCache> dex_cache(self, AllocDexCache(self, dex_file));
Ian Rogersa436fde2013-08-27 23:34:06 -07001955 CHECK(dex_cache.get() != NULL) << "Failed to allocate dex cache for " << dex_file.GetLocation();
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001956 AppendToBootClassPath(dex_file, dex_cache);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001957}
1958
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001959void ClassLinker::AppendToBootClassPath(const DexFile& dex_file,
1960 const SirtRef<mirror::DexCache>& dex_cache) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001961 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07001962 boot_class_path_.push_back(&dex_file);
Brian Carlstroma663ea52011-08-19 23:33:41 -07001963 RegisterDexFile(dex_file, dex_cache);
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001964}
1965
Brian Carlstromaded5f72011-10-07 17:15:04 -07001966bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) const {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001967 dex_lock_.AssertSharedHeld(Thread::Current());
Mathieu Chartier66f19252012-09-18 08:57:04 -07001968 for (size_t i = 0; i != dex_caches_.size(); ++i) {
1969 if (dex_caches_[i]->GetDexFile() == &dex_file) {
Ian Rogers19846512012-02-24 11:42:47 -08001970 return true;
Brian Carlstromaded5f72011-10-07 17:15:04 -07001971 }
1972 }
1973 return false;
Brian Carlstroma663ea52011-08-19 23:33:41 -07001974}
1975
Brian Carlstromaded5f72011-10-07 17:15:04 -07001976bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) const {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001977 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstrom06918512011-10-16 23:39:12 -07001978 return IsDexFileRegisteredLocked(dex_file);
Brian Carlstromaded5f72011-10-07 17:15:04 -07001979}
1980
Mathieu Chartierc528dba2013-11-26 12:00:11 -08001981void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file,
1982 const SirtRef<mirror::DexCache>& dex_cache) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001983 dex_lock_.AssertExclusiveHeld(Thread::Current());
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001984 CHECK(dex_cache.get() != NULL) << dex_file.GetLocation();
Brian Carlstrom7c3d13a2013-09-04 17:15:11 -07001985 CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation()))
1986 << dex_cache->GetLocation()->ToModifiedUtf8() << " " << dex_file.GetLocation();
Brian Carlstrom40381fb2011-10-19 14:13:40 -07001987 dex_caches_.push_back(dex_cache.get());
Mathieu Chartier66f19252012-09-18 08:57:04 -07001988 dex_cache->SetDexFile(&dex_file);
Mathieu Chartierc4621982013-09-16 19:43:47 -07001989 dex_caches_dirty_ = true;
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07001990}
1991
Brian Carlstromaded5f72011-10-07 17:15:04 -07001992void ClassLinker::RegisterDexFile(const DexFile& dex_file) {
Ian Rogers1f539342012-10-03 21:09:42 -07001993 Thread* self = Thread::Current();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001994 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07001995 ReaderMutexLock mu(self, dex_lock_);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07001996 if (IsDexFileRegisteredLocked(dex_file)) {
1997 return;
1998 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07001999 }
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002000 // Don't alloc while holding the lock, since allocation may need to
2001 // suspend all threads and another thread may need the dex_lock_ to
2002 // get to a suspend point.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002003 SirtRef<mirror::DexCache> dex_cache(self, AllocDexCache(self, dex_file));
Ian Rogersa436fde2013-08-27 23:34:06 -07002004 CHECK(dex_cache.get() != NULL) << "Failed to allocate dex cache for " << dex_file.GetLocation();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002005 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002006 WriterMutexLock mu(self, dex_lock_);
Brian Carlstrom47d237a2011-10-18 15:08:33 -07002007 if (IsDexFileRegisteredLocked(dex_file)) {
2008 return;
2009 }
2010 RegisterDexFileLocked(dex_file, dex_cache);
2011 }
Brian Carlstromaded5f72011-10-07 17:15:04 -07002012}
2013
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002014void ClassLinker::RegisterDexFile(const DexFile& dex_file,
2015 const SirtRef<mirror::DexCache>& dex_cache) {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002016 WriterMutexLock mu(Thread::Current(), dex_lock_);
Brian Carlstromaded5f72011-10-07 17:15:04 -07002017 RegisterDexFileLocked(dex_file, dex_cache);
2018}
2019
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002020mirror::DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) const {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002021 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002022 // Search assuming unique-ness of dex file.
Mathieu Chartier66f19252012-09-18 08:57:04 -07002023 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002024 mirror::DexCache* dex_cache = dex_caches_[i];
Mathieu Chartier66f19252012-09-18 08:57:04 -07002025 if (dex_cache->GetDexFile() == &dex_file) {
2026 return dex_cache;
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002027 }
2028 }
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002029 // Search matching by location name.
2030 std::string location(dex_file.GetLocation());
2031 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002032 mirror::DexCache* dex_cache = dex_caches_[i];
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002033 if (dex_cache->GetDexFile()->GetLocation() == location) {
2034 return dex_cache;
2035 }
2036 }
2037 // Failure, dump diagnostic and abort.
2038 for (size_t i = 0; i != dex_caches_.size(); ++i) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002039 mirror::DexCache* dex_cache = dex_caches_[i];
Ian Rogers2bcb4a42012-11-08 10:39:18 -08002040 LOG(ERROR) << "Registered dex file " << i << " = " << dex_cache->GetDexFile()->GetLocation();
2041 }
2042 LOG(FATAL) << "Failed to find DexCache for DexFile " << location;
Brian Carlstrom578bbdc2011-07-21 14:07:47 -07002043 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002044}
2045
Brian Carlstromea46f952013-07-30 01:26:50 -07002046void ClassLinker::FixupDexCaches(mirror::ArtMethod* resolution_method) const {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002047 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers19846512012-02-24 11:42:47 -08002048 for (size_t i = 0; i != dex_caches_.size(); ++i) {
2049 dex_caches_[i]->Fixup(resolution_method);
2050 }
2051}
2052
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002053mirror::Class* ClassLinker::CreatePrimitiveClass(Thread* self, Primitive::Type type) {
Ian Rogersa436fde2013-08-27 23:34:06 -07002054 mirror::Class* klass = AllocClass(self, sizeof(mirror::Class));
2055 if (UNLIKELY(klass == NULL)) {
2056 return NULL;
2057 }
2058 return InitializePrimitiveClass(klass, type);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002059}
2060
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002061mirror::Class* ClassLinker::InitializePrimitiveClass(mirror::Class* primitive_class,
2062 Primitive::Type type) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002063 CHECK(primitive_class != NULL);
Ian Rogers1f539342012-10-03 21:09:42 -07002064 // Must hold lock on object when initializing.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002065 Thread* self = Thread::Current();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002066 SirtRef<mirror::Class> sirt_class(self, primitive_class);
2067 ObjectLock<mirror::Class> lock(self, &sirt_class);
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002068 primitive_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract);
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002069 primitive_class->SetPrimitiveType(type);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002070 primitive_class->SetStatus(mirror::Class::kStatusInitialized, self);
2071 const char* descriptor = Primitive::Descriptor(type);
2072 mirror::Class* existing = InsertClass(descriptor, primitive_class, Hash(descriptor));
Ian Rogersc8982582012-09-07 16:53:25 -07002073 CHECK(existing == NULL) << "InitPrimitiveClass(" << type << ") failed";
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002074 return primitive_class;
Carl Shapiro565f5072011-07-10 13:39:43 -07002075}
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002076
Brian Carlstrombe977852011-07-19 14:54:54 -07002077// Create an array class (i.e. the class object for the array, not the
2078// array itself). "descriptor" looks like "[C" or "[[[[B" or
2079// "[Ljava/lang/String;".
2080//
2081// If "descriptor" refers to an array of primitives, look up the
2082// primitive type's internally-generated class object.
2083//
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002084// "class_loader" is the class loader of the class that's referring to
2085// us. It's used to ensure that we're looking for the element type in
2086// the right context. It does NOT become the class loader for the
2087// array class; that always comes from the base element class.
Brian Carlstrombe977852011-07-19 14:54:54 -07002088//
2089// Returns NULL with an exception raised on failure.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002090mirror::Class* ClassLinker::CreateArrayClass(const char* descriptor,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002091 const SirtRef<mirror::ClassLoader>& class_loader) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002092 // Identify the underlying component type
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002093 CHECK_EQ('[', descriptor[0]);
2094 mirror::Class* component_type = FindClass(descriptor + 1, class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002095 if (component_type == NULL) {
Brian Carlstrom5b8e4c82011-09-18 01:38:59 -07002096 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002097 return NULL;
2098 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002099
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002100 // See if the component type is already loaded. Array classes are
2101 // always associated with the class loader of their underlying
2102 // element type -- an array of Strings goes with the loader for
2103 // java/lang/String -- so we need to look for it there. (The
2104 // caller should have checked for the existence of the class
2105 // before calling here, but they did so with *their* class loader,
2106 // not the component type's loader.)
2107 //
2108 // If we find it, the caller adds "loader" to the class' initiating
2109 // loader list, which should prevent us from going through this again.
2110 //
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002111 // This call is unnecessary if "loader" and "component_type->GetClassLoader()"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002112 // are the same, because our caller (FindClass) just did the
2113 // lookup. (Even if we get this wrong we still have correct behavior,
2114 // because we effectively do this lookup again when we add the new
2115 // class to the hash table --- necessary because of possible races with
2116 // other threads.)
Mathieu Chartier590fee92013-09-13 13:46:47 -07002117 if (class_loader.get() != component_type->GetClassLoader()) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002118 mirror::Class* new_class = LookupClass(descriptor, component_type->GetClassLoader());
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002119 if (new_class != NULL) {
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002120 return new_class;
2121 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002122 }
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002123
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002124 // Fill out the fields in the Class.
2125 //
2126 // It is possible to execute some methods against arrays, because
2127 // all arrays are subclasses of java_lang_Object_, so we need to set
2128 // up a vtable. We can just point at the one in java_lang_Object_.
2129 //
2130 // Array classes are simple enough that we don't need to do a full
2131 // link step.
Ian Rogers1f539342012-10-03 21:09:42 -07002132 Thread* self = Thread::Current();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002133 SirtRef<mirror::Class> new_class(self, NULL);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002134 if (UNLIKELY(!init_done_)) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002135 // Classes that were hand created, ie not by FindSystemClass
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002136 if (strcmp(descriptor, "[Ljava/lang/Class;") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002137 new_class.reset(GetClassRoot(kClassArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002138 } else if (strcmp(descriptor, "[Ljava/lang/Object;") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002139 new_class.reset(GetClassRoot(kObjectArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002140 } else if (strcmp(descriptor, class_roots_descriptors_[kJavaLangStringArrayClass]) == 0) {
Mathieu Chartier66f19252012-09-18 08:57:04 -07002141 new_class.reset(GetClassRoot(kJavaLangStringArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002142 } else if (strcmp(descriptor,
2143 class_roots_descriptors_[kJavaLangReflectArtMethodArrayClass]) == 0) {
Brian Carlstromea46f952013-07-30 01:26:50 -07002144 new_class.reset(GetClassRoot(kJavaLangReflectArtMethodArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002145 } else if (strcmp(descriptor,
2146 class_roots_descriptors_[kJavaLangReflectArtFieldArrayClass]) == 0) {
Brian Carlstromea46f952013-07-30 01:26:50 -07002147 new_class.reset(GetClassRoot(kJavaLangReflectArtFieldArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002148 } else if (strcmp(descriptor, "[C") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002149 new_class.reset(GetClassRoot(kCharArrayClass));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002150 } else if (strcmp(descriptor, "[I") == 0) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002151 new_class.reset(GetClassRoot(kIntArrayClass));
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002152 }
2153 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002154 if (new_class.get() == NULL) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002155 new_class.reset(AllocClass(self, sizeof(mirror::Class)));
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002156 if (new_class.get() == NULL) {
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002157 return NULL;
2158 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002159 new_class->SetComponentType(component_type);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002160 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002161 ObjectLock<mirror::Class> lock(self, &new_class); // Must hold lock on object when initializing.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002162 DCHECK(new_class->GetComponentType() != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002163 mirror::Class* java_lang_Object = GetClassRoot(kJavaLangObject);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002164 new_class->SetSuperClass(java_lang_Object);
2165 new_class->SetVTable(java_lang_Object->GetVTable());
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002166 new_class->SetPrimitiveType(Primitive::kPrimNot);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002167 new_class->SetClassLoader(component_type->GetClassLoader());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002168 new_class->SetStatus(mirror::Class::kStatusInitialized, self);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07002169 // don't need to set new_class->SetObjectSize(..)
Brian Carlstrom9cff8e12011-08-18 16:47:29 -07002170 // because Object::SizeOf delegates to Array::SizeOf
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002171
2172
2173 // All arrays have java/lang/Cloneable and java/io/Serializable as
2174 // interfaces. We need to set that up here, so that stuff like
2175 // "instanceof" works right.
2176 //
2177 // Note: The GC could run during the call to FindSystemClass,
2178 // so we need to make sure the class object is GC-valid while we're in
2179 // there. Do this by clearing the interface list so the GC will just
2180 // think that the entries are null.
2181
2182
2183 // Use the single, global copies of "interfaces" and "iftable"
2184 // (remember not to free them for arrays).
Elliott Hughes92f14b22011-10-06 12:29:54 -07002185 CHECK(array_iftable_ != NULL);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07002186 new_class->SetIfTable(array_iftable_);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002187
Elliott Hughes00626c22013-06-14 15:04:14 -07002188 // Inherit access flags from the component type.
2189 int access_flags = new_class->GetComponentType()->GetAccessFlags();
2190 // Lose any implementation detail flags; in particular, arrays aren't finalizable.
2191 access_flags &= kAccJavaFlagsMask;
2192 // Arrays can't be used as a superclass or interface, so we want to add "abstract final"
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002193 // and remove "interface".
Elliott Hughes00626c22013-06-14 15:04:14 -07002194 access_flags |= kAccAbstract | kAccFinal;
2195 access_flags &= ~kAccInterface;
2196
2197 new_class->SetAccessFlags(access_flags);
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002198
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002199 mirror::Class* existing = InsertClass(descriptor, new_class.get(), Hash(descriptor));
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002200 if (existing == NULL) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002201 return new_class.get();
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002202 }
2203 // Another thread must have loaded the class after we
2204 // started but before we finished. Abandon what we've
2205 // done.
2206 //
2207 // (Yes, this happens.)
2208
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002209 return existing;
Brian Carlstroma331b3c2011-07-18 17:47:56 -07002210}
2211
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002212mirror::Class* ClassLinker::FindPrimitiveClass(char type) {
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002213 switch (Primitive::GetType(type)) {
2214 case Primitive::kPrimByte:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002215 return GetClassRoot(kPrimitiveByte);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002216 case Primitive::kPrimChar:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002217 return GetClassRoot(kPrimitiveChar);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002218 case Primitive::kPrimDouble:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002219 return GetClassRoot(kPrimitiveDouble);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002220 case Primitive::kPrimFloat:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002221 return GetClassRoot(kPrimitiveFloat);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002222 case Primitive::kPrimInt:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002223 return GetClassRoot(kPrimitiveInt);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002224 case Primitive::kPrimLong:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002225 return GetClassRoot(kPrimitiveLong);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002226 case Primitive::kPrimShort:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002227 return GetClassRoot(kPrimitiveShort);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002228 case Primitive::kPrimBoolean:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002229 return GetClassRoot(kPrimitiveBoolean);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002230 case Primitive::kPrimVoid:
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002231 return GetClassRoot(kPrimitiveVoid);
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07002232 case Primitive::kPrimNot:
2233 break;
Carl Shapiro744ad052011-08-06 15:53:36 -07002234 }
Elliott Hughesbd935992011-08-22 11:59:34 -07002235 std::string printable_type(PrintableChar(type));
Elliott Hughes4a2b4172011-09-20 17:08:25 -07002236 ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str());
Elliott Hughesbd935992011-08-22 11:59:34 -07002237 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002238}
2239
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002240mirror::Class* ClassLinker::InsertClass(const char* descriptor, mirror::Class* klass,
2241 size_t hash) {
Elliott Hughes4dd9b4d2011-12-12 18:29:24 -08002242 if (VLOG_IS_ON(class_linker)) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002243 mirror::DexCache* dex_cache = klass->GetDexCache();
Brian Carlstromae826982011-11-09 01:33:42 -08002244 std::string source;
2245 if (dex_cache != NULL) {
2246 source += " from ";
2247 source += dex_cache->GetLocation()->ToModifiedUtf8();
2248 }
2249 LOG(INFO) << "Loaded class " << descriptor << source;
2250 }
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002251 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers1d54e732013-05-02 21:10:01 -07002252 mirror::Class* existing =
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002253 LookupClassFromTableLocked(descriptor, klass->GetClassLoader(), hash);
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002254 if (existing != NULL) {
2255 return existing;
Ian Rogers5d76c432011-10-31 21:42:49 -07002256 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002257 if (kIsDebugBuild && klass->GetClassLoader() == NULL && dex_cache_image_class_lookup_required_) {
2258 // Check a class loaded with the system class loader matches one in the image if the class
2259 // is in the image.
2260 existing = LookupClassFromImage(descriptor);
2261 if (existing != NULL) {
2262 CHECK(klass == existing);
2263 }
2264 }
Ian Rogers1d54e732013-05-02 21:10:01 -07002265 Runtime::Current()->GetHeap()->VerifyObject(klass);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002266 class_table_.insert(std::make_pair(hash, klass));
Mathieu Chartierc4621982013-09-16 19:43:47 -07002267 class_table_dirty_ = true;
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002268 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002269}
2270
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002271bool ClassLinker::RemoveClass(const char* descriptor, const mirror::ClassLoader* class_loader) {
Elliott Hughesc3b77c72011-12-15 20:56:48 -08002272 size_t hash = Hash(descriptor);
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002273 WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002274 for (auto it = class_table_.lower_bound(hash), end = class_table_.end(); it != end && it->first == hash;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002275 ++it) {
2276 mirror::Class* klass = it->second;
Mathieu Chartier590fee92013-09-13 13:46:47 -07002277 ClassHelper kh(klass);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002278 if ((klass->GetClassLoader() == class_loader) &&
2279 (strcmp(descriptor, kh.GetDescriptor()) == 0)) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002280 class_table_.erase(it);
Brian Carlstromae826982011-11-09 01:33:42 -08002281 return true;
2282 }
2283 }
2284 return false;
2285}
2286
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002287mirror::Class* ClassLinker::LookupClass(const char* descriptor,
2288 const mirror::ClassLoader* class_loader) {
Elliott Hughesc3b77c72011-12-15 20:56:48 -08002289 size_t hash = Hash(descriptor);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002290 {
2291 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
2292 mirror::Class* result = LookupClassFromTableLocked(descriptor, class_loader, hash);
2293 if (result != NULL) {
2294 return result;
2295 }
Sameer Abu Asal2c6de222013-05-02 17:38:59 -07002296 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002297 if (class_loader != NULL || !dex_cache_image_class_lookup_required_) {
2298 return NULL;
2299 } else {
2300 // Lookup failed but need to search dex_caches_.
2301 mirror::Class* result = LookupClassFromImage(descriptor);
2302 if (result != NULL) {
2303 InsertClass(descriptor, result, hash);
2304 } else {
2305 // Searching the image dex files/caches failed, we don't want to get into this situation
2306 // often as map searches are faster, so after kMaxFailedDexCacheLookups move all image
2307 // classes into the class table.
2308 const int32_t kMaxFailedDexCacheLookups = 1000;
2309 if (++failed_dex_cache_class_lookups_ > kMaxFailedDexCacheLookups) {
2310 MoveImageClassesToClassTable();
2311 }
2312 }
2313 return result;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002314 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002315}
2316
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002317mirror::Class* ClassLinker::LookupClassFromTableLocked(const char* descriptor,
2318 const mirror::ClassLoader* class_loader,
2319 size_t hash) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002320 auto end = class_table_.end();
2321 for (auto it = class_table_.lower_bound(hash); it != end && it->first == hash; ++it) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002322 mirror::Class* klass = it->second;
Mathieu Chartier590fee92013-09-13 13:46:47 -07002323 ClassHelper kh(klass);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002324 if ((klass->GetClassLoader() == class_loader) &&
2325 (strcmp(descriptor, kh.GetDescriptor()) == 0)) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002326 if (kIsDebugBuild) {
2327 // Check for duplicates in the table.
2328 for (++it; it != end && it->first == hash; ++it) {
2329 mirror::Class* klass2 = it->second;
Mathieu Chartier590fee92013-09-13 13:46:47 -07002330 ClassHelper kh(klass2);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002331 CHECK(!((klass2->GetClassLoader() == class_loader) &&
2332 (strcmp(descriptor, kh.GetDescriptor()) == 0)))
Ian Rogersfc0e94b2013-09-23 23:51:32 -07002333 << PrettyClass(klass) << " " << klass << " " << klass->GetClassLoader() << " "
2334 << PrettyClass(klass2) << " " << klass2 << " " << klass2->GetClassLoader();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002335 }
Brian Carlstrom07bb8552012-01-18 22:10:50 -08002336 }
Ian Rogers5d76c432011-10-31 21:42:49 -07002337 return klass;
2338 }
2339 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07002340 return NULL;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07002341}
2342
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002343static mirror::ObjectArray<mirror::DexCache>* GetImageDexCaches()
2344 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
2345 gc::space::ImageSpace* image = Runtime::Current()->GetHeap()->GetImageSpace();
2346 CHECK(image != NULL);
2347 mirror::Object* root = image->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches);
2348 return root->AsObjectArray<mirror::DexCache>();
2349}
2350
2351void ClassLinker::MoveImageClassesToClassTable() {
2352 Thread* self = Thread::Current();
2353 WriterMutexLock mu(self, *Locks::classlinker_classes_lock_);
2354 if (!dex_cache_image_class_lookup_required_) {
2355 return; // All dex cache classes are already in the class table.
2356 }
2357 const char* old_no_suspend_cause =
2358 self->StartAssertNoThreadSuspension("Moving image classes to class table");
2359 mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002360 for (int32_t i = 0; i < dex_caches->GetLength(); i++) {
2361 mirror::DexCache* dex_cache = dex_caches->Get(i);
2362 mirror::ObjectArray<mirror::Class>* types = dex_cache->GetResolvedTypes();
2363 for (int32_t j = 0; j < types->GetLength(); j++) {
2364 mirror::Class* klass = types->Get(j);
2365 if (klass != NULL) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07002366 ClassHelper kh(klass);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002367 DCHECK(klass->GetClassLoader() == NULL);
2368 const char* descriptor = kh.GetDescriptor();
2369 size_t hash = Hash(descriptor);
2370 mirror::Class* existing = LookupClassFromTableLocked(descriptor, NULL, hash);
2371 if (existing != NULL) {
2372 CHECK(existing == klass) << PrettyClassAndClassLoader(existing) << " != "
2373 << PrettyClassAndClassLoader(klass);
2374 } else {
2375 class_table_.insert(std::make_pair(hash, klass));
2376 }
2377 }
Elliott Hughes6fa602d2011-12-02 17:54:25 -08002378 }
2379 }
Mathieu Chartierc4621982013-09-16 19:43:47 -07002380 class_table_dirty_ = true;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002381 dex_cache_image_class_lookup_required_ = false;
2382 self->EndAssertNoThreadSuspension(old_no_suspend_cause);
2383}
2384
2385mirror::Class* ClassLinker::LookupClassFromImage(const char* descriptor) {
2386 Thread* self = Thread::Current();
2387 const char* old_no_suspend_cause =
2388 self->StartAssertNoThreadSuspension("Image class lookup");
2389 mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches();
2390 for (int32_t i = 0; i < dex_caches->GetLength(); ++i) {
2391 mirror::DexCache* dex_cache = dex_caches->Get(i);
2392 const DexFile* dex_file = dex_cache->GetDexFile();
2393 // First search using the class def map, but don't bother for non-class types.
2394 if (descriptor[0] == 'L') {
Ian Rogers8b2c0b92013-09-19 02:56:49 -07002395 const DexFile::StringId* descriptor_string_id = dex_file->FindStringId(descriptor);
2396 if (descriptor_string_id != NULL) {
2397 const DexFile::TypeId* type_id =
2398 dex_file->FindTypeId(dex_file->GetIndexForStringId(*descriptor_string_id));
2399 if (type_id != NULL) {
2400 mirror::Class* klass = dex_cache->GetResolvedType(dex_file->GetIndexForTypeId(*type_id));
2401 if (klass != NULL) {
2402 self->EndAssertNoThreadSuspension(old_no_suspend_cause);
2403 return klass;
2404 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002405 }
2406 }
2407 }
2408 // Now try binary searching the string/type index.
2409 const DexFile::StringId* string_id = dex_file->FindStringId(descriptor);
2410 if (string_id != NULL) {
2411 const DexFile::TypeId* type_id =
2412 dex_file->FindTypeId(dex_file->GetIndexForStringId(*string_id));
2413 if (type_id != NULL) {
2414 uint16_t type_idx = dex_file->GetIndexForTypeId(*type_id);
2415 mirror::Class* klass = dex_cache->GetResolvedType(type_idx);
2416 if (klass != NULL) {
2417 self->EndAssertNoThreadSuspension(old_no_suspend_cause);
2418 return klass;
2419 }
2420 }
2421 }
2422 }
2423 self->EndAssertNoThreadSuspension(old_no_suspend_cause);
2424 return NULL;
2425}
2426
2427void ClassLinker::LookupClasses(const char* descriptor, std::vector<mirror::Class*>& result) {
2428 result.clear();
2429 if (dex_cache_image_class_lookup_required_) {
2430 MoveImageClassesToClassTable();
2431 }
2432 size_t hash = Hash(descriptor);
2433 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002434 for (auto it = class_table_.lower_bound(hash), end = class_table_.end();
Mathieu Chartier02e25112013-08-14 16:14:24 -07002435 it != end && it->first == hash; ++it) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002436 mirror::Class* klass = it->second;
Mathieu Chartier590fee92013-09-13 13:46:47 -07002437 ClassHelper kh(klass);
Ian Rogersdfb325e2013-10-30 01:00:44 -07002438 if (strcmp(descriptor, kh.GetDescriptor()) == 0) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002439 result.push_back(klass);
Elliott Hughes6fa602d2011-12-02 17:54:25 -08002440 }
2441 }
2442}
2443
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002444void ClassLinker::VerifyClass(const SirtRef<mirror::Class>& klass) {
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002445 // TODO: assert that the monitor on the Class is held
Ian Rogers1f539342012-10-03 21:09:42 -07002446 Thread* self = Thread::Current();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002447 ObjectLock<mirror::Class> lock(self, &klass);
Elliott Hughesd9c67be2012-02-02 19:54:06 -08002448
Ian Rogers9ffb0392012-09-10 11:56:50 -07002449 // Don't attempt to re-verify if already sufficiently verified.
2450 if (klass->IsVerified() ||
2451 (klass->IsCompileTimeVerified() && Runtime::Current()->IsCompiler())) {
jeffhao98eacac2011-09-14 16:11:53 -07002452 return;
2453 }
2454
Ian Rogers9ffb0392012-09-10 11:56:50 -07002455 // The class might already be erroneous, for example at compile time if we attempted to verify
2456 // this class as a parent to another.
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002457 if (klass->IsErroneous()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002458 ThrowEarlierClassFailure(klass.get());
Brian Carlstrom9b5ee882012-02-28 09:48:54 -08002459 return;
2460 }
2461
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002462 if (klass->GetStatus() == mirror::Class::kStatusResolved) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002463 klass->SetStatus(mirror::Class::kStatusVerifying, self);
Ian Rogers9ffb0392012-09-10 11:56:50 -07002464 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002465 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime)
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002466 << PrettyClass(klass.get());
Ian Rogers9ffb0392012-09-10 11:56:50 -07002467 CHECK(!Runtime::Current()->IsCompiler());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002468 klass->SetStatus(mirror::Class::kStatusVerifyingAtRuntime, self);
Ian Rogers9ffb0392012-09-10 11:56:50 -07002469 }
jeffhao98eacac2011-09-14 16:11:53 -07002470
Ian Rogers9ffb0392012-09-10 11:56:50 -07002471 // Verify super class.
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002472 SirtRef<mirror::Class> super(self, klass->GetSuperClass());
2473 if (super.get() != NULL) {
Ian Rogers9ffb0392012-09-10 11:56:50 -07002474 // Acquire lock to prevent races on verifying the super class.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002475 ObjectLock<mirror::Class> lock(self, &super);
Ian Rogers1c5eb702012-02-01 09:18:34 -08002476
2477 if (!super->IsVerified() && !super->IsErroneous()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002478 VerifyClass(super);
Ian Rogers1c5eb702012-02-01 09:18:34 -08002479 }
jeffhaof1e6b7c2012-06-05 18:33:30 -07002480 if (!super->IsCompileTimeVerified()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08002481 std::string error_msg(StringPrintf("Rejecting class %s that attempts to sub-class erroneous class %s",
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002482 PrettyDescriptor(klass.get()).c_str(),
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002483 PrettyDescriptor(super.get()).c_str()));
Ian Rogers1c5eb702012-02-01 09:18:34 -08002484 LOG(ERROR) << error_msg << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8();
Ian Rogers62d6c772013-02-27 08:32:07 -08002485 SirtRef<mirror::Throwable> cause(self, self->GetException(NULL));
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002486 if (cause.get() != nullptr) {
Ian Rogers1c5eb702012-02-01 09:18:34 -08002487 self->ClearException();
2488 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002489 ThrowVerifyError(klass.get(), "%s", error_msg.c_str());
2490 if (cause.get() != nullptr) {
2491 self->GetException(nullptr)->SetCause(cause.get());
Ian Rogers1c5eb702012-02-01 09:18:34 -08002492 }
Jeff Hao22cb09b2013-12-12 14:29:15 -08002493 ClassReference ref(klass->GetDexCache()->GetDexFile(), klass->GetDexClassDefIndex());
Vladimir Marko2b5eaa22013-12-13 13:59:30 +00002494 if (Runtime::Current()->IsCompiler()) {
2495 Runtime::Current()->GetCompilerCallbacks()->ClassRejected(ref);
2496 }
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002497 klass->SetStatus(mirror::Class::kStatusError, self);
Ian Rogers1c5eb702012-02-01 09:18:34 -08002498 return;
2499 }
2500 }
2501
Elliott Hughes634eb2e2012-03-22 16:06:28 -07002502 // Try to use verification information from the oat file, otherwise do runtime verification.
Ian Rogers4445a7e2012-10-05 17:19:13 -07002503 const DexFile& dex_file = *klass->GetDexCache()->GetDexFile();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002504 mirror::Class::Status oat_file_class_status(mirror::Class::kStatusNotReady);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002505 bool preverified = VerifyClassUsingOatFile(dex_file, klass.get(), oat_file_class_status);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002506 if (oat_file_class_status == mirror::Class::kStatusError) {
Ian Rogerse6bb3b22013-08-19 21:51:45 -07002507 VLOG(class_linker) << "Skipping runtime verification of erroneous class "
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002508 << PrettyDescriptor(klass.get()) << " in "
Ian Rogerse6bb3b22013-08-19 21:51:45 -07002509 << klass->GetDexCache()->GetLocation()->ToModifiedUtf8();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002510 ThrowVerifyError(klass.get(), "Rejecting class %s because it failed compile-time verification",
2511 PrettyDescriptor(klass.get()).c_str());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002512 klass->SetStatus(mirror::Class::kStatusError, self);
jeffhaoec014232012-09-05 10:42:25 -07002513 return;
2514 }
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02002515 verifier::MethodVerifier::FailureKind verifier_failure = verifier::MethodVerifier::kNoFailure;
Ian Rogers62d6c772013-02-27 08:32:07 -08002516 std::string error_msg;
jeffhaof1e6b7c2012-06-05 18:33:30 -07002517 if (!preverified) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002518 verifier_failure = verifier::MethodVerifier::VerifyClass(klass.get(),
Ian Rogers8b2c0b92013-09-19 02:56:49 -07002519 Runtime::Current()->IsCompiler(),
2520 &error_msg);
jeffhaof1e6b7c2012-06-05 18:33:30 -07002521 }
2522 if (preverified || verifier_failure != verifier::MethodVerifier::kHardFailure) {
Ian Rogers529781d2012-07-23 17:24:29 -07002523 if (!preverified && verifier_failure != verifier::MethodVerifier::kNoFailure) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002524 VLOG(class_linker) << "Soft verification failure in class " << PrettyDescriptor(klass.get())
Ian Rogers529781d2012-07-23 17:24:29 -07002525 << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8()
2526 << " because: " << error_msg;
2527 }
Ian Rogers1f539342012-10-03 21:09:42 -07002528 self->AssertNoPendingException();
jeffhaoe4f0b2a2012-08-30 11:18:57 -07002529 // Make sure all classes referenced by catch blocks are resolved.
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002530 ResolveClassExceptionHandlerTypes(dex_file, klass);
jeffhaoe4f0b2a2012-08-30 11:18:57 -07002531 if (verifier_failure == verifier::MethodVerifier::kNoFailure) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002532 // Even though there were no verifier failures we need to respect whether the super-class
2533 // was verified or requiring runtime reverification.
2534 if (super.get() == NULL || super->IsVerified()) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002535 klass->SetStatus(mirror::Class::kStatusVerified, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002536 } else {
2537 CHECK_EQ(super->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002538 klass->SetStatus(mirror::Class::kStatusRetryVerificationAtRuntime, self);
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07002539 // Pretend a soft failure occured so that we don't consider the class verified below.
2540 verifier_failure = verifier::MethodVerifier::kSoftFailure;
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002541 }
jeffhaoe4f0b2a2012-08-30 11:18:57 -07002542 } else {
2543 CHECK_EQ(verifier_failure, verifier::MethodVerifier::kSoftFailure);
2544 // Soft failures at compile time should be retried at runtime. Soft
2545 // failures at runtime will be handled by slow paths in the generated
2546 // code. Set status accordingly.
2547 if (Runtime::Current()->IsCompiler()) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002548 klass->SetStatus(mirror::Class::kStatusRetryVerificationAtRuntime, self);
jeffhaoe4f0b2a2012-08-30 11:18:57 -07002549 } else {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002550 klass->SetStatus(mirror::Class::kStatusVerified, self);
jeffhaoe4f0b2a2012-08-30 11:18:57 -07002551 }
2552 }
jeffhao5cfd6fb2011-09-27 13:54:29 -07002553 } else {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002554 LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(klass.get())
Ian Rogers1c5eb702012-02-01 09:18:34 -08002555 << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8()
2556 << " because: " << error_msg;
Ian Rogers00f7d0e2012-07-19 15:28:27 -07002557 self->AssertNoPendingException();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002558 ThrowVerifyError(klass.get(), "%s", error_msg.c_str());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002559 klass->SetStatus(mirror::Class::kStatusError, self);
jeffhao5cfd6fb2011-09-27 13:54:29 -07002560 }
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02002561 if (preverified || verifier_failure == verifier::MethodVerifier::kNoFailure) {
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07002562 // Class is verified so we don't need to do any access check on its methods.
Sebastien Hertz233ea8e2013-06-06 11:57:09 +02002563 // Let the interpreter know it by setting the kAccPreverified flag onto each
2564 // method.
2565 // Note: we're going here during compilation and at runtime. When we set the
2566 // kAccPreverified flag when compiling image classes, the flag is recorded
2567 // in the image and is set when loading the image.
2568 klass->SetPreverifiedFlagOnAllMethods();
2569 }
jeffhao98eacac2011-09-14 16:11:53 -07002570}
2571
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002572bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, mirror::Class* klass,
2573 mirror::Class::Status& oat_file_class_status) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07002574 // If we're compiling, we can only verify the class using the oat file if
2575 // we are not compiling the image or if the class we're verifying is not part of
2576 // the app. In other words, we will only check for preverification of bootclasspath
2577 // classes.
2578 if (Runtime::Current()->IsCompiler()) {
2579 // Are we compiling the bootclasspath?
2580 if (!Runtime::Current()->UseCompileTimeClassPath()) {
2581 return false;
2582 }
2583 // We are compiling an app (not the image).
2584
2585 // Is this an app class? (I.e. not a bootclasspath class)
2586 if (klass->GetClassLoader() != NULL) {
2587 return false;
2588 }
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002589 }
Anwar Ghuloum044d2832013-07-17 15:22:31 -07002590
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002591 const OatFile* oat_file = FindOpenedOatFileForDexFile(dex_file);
Anwar Ghuloumad256bb2013-07-18 14:58:55 -07002592 // Make this work with gtests, which do not set up the image properly.
2593 // TODO: we should clean up gtests to set up the image path properly.
2594 if (Runtime::Current()->IsCompiler() && (oat_file == NULL)) {
2595 return false;
2596 }
2597
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002598 CHECK(oat_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
Brian Carlstrom756ee4e2013-10-03 15:46:12 -07002599 uint dex_location_checksum = dex_file.GetLocationChecksum();
Ian Rogers8d31bbd2013-10-13 10:44:14 -07002600 const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_file.GetLocation().c_str(),
Brian Carlstrom756ee4e2013-10-03 15:46:12 -07002601 &dex_location_checksum);
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002602 CHECK(oat_dex_file != NULL) << dex_file.GetLocation() << " " << PrettyClass(klass);
Ian Rogers8b2c0b92013-09-19 02:56:49 -07002603 uint16_t class_def_index = klass->GetDexClassDefIndex();
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002604 UniquePtr<const OatFile::OatClass> oat_class(oat_dex_file->GetOatClass(class_def_index));
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002605 CHECK(oat_class.get() != NULL)
Ian Rogersfc0e94b2013-09-23 23:51:32 -07002606 << dex_file.GetLocation() << " " << PrettyClass(klass) << " "
2607 << ClassHelper(klass).GetDescriptor();
Elliott Hughes634eb2e2012-03-22 16:06:28 -07002608 oat_file_class_status = oat_class->GetStatus();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002609 if (oat_file_class_status == mirror::Class::kStatusVerified ||
2610 oat_file_class_status == mirror::Class::kStatusInitialized) {
Anwar Ghuloum044d2832013-07-17 15:22:31 -07002611 return true;
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002612 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002613 if (oat_file_class_status == mirror::Class::kStatusRetryVerificationAtRuntime) {
jeffhao1ac29442012-03-26 11:37:32 -07002614 // Compile time verification failed with a soft error. Compile time verification can fail
2615 // because we have incomplete type information. Consider the following:
Ian Rogersc4762272012-02-01 15:55:55 -08002616 // class ... {
2617 // Foo x;
2618 // .... () {
2619 // if (...) {
2620 // v1 gets assigned a type of resolved class Foo
2621 // } else {
2622 // v1 gets assigned a type of unresolved class Bar
2623 // }
2624 // iput x = v1
2625 // } }
2626 // when we merge v1 following the if-the-else it results in Conflict
2627 // (see verifier::RegType::Merge) as we can't know the type of Bar and we could possibly be
2628 // allowing an unsafe assignment to the field x in the iput (javac may have compiled this as
2629 // it knew Bar was a sub-class of Foo, but for us this may have been moved into a separate apk
2630 // at compile time).
2631 return false;
2632 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002633 if (oat_file_class_status == mirror::Class::kStatusError) {
jeffhao1ac29442012-03-26 11:37:32 -07002634 // Compile time verification failed with a hard error. This is caused by invalid instructions
2635 // in the class. These errors are unrecoverable.
2636 return false;
2637 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002638 if (oat_file_class_status == mirror::Class::kStatusNotReady) {
Ian Rogersc4762272012-02-01 15:55:55 -08002639 // Status is uninitialized if we couldn't determine the status at compile time, for example,
2640 // not loading the class.
2641 // TODO: when the verifier doesn't rely on Class-es failing to resolve/load the type hierarchy
2642 // isn't a problem and this case shouldn't occur
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002643 return false;
2644 }
Elliott Hughes634eb2e2012-03-22 16:06:28 -07002645 LOG(FATAL) << "Unexpected class status: " << oat_file_class_status
Ian Rogersfc0e94b2013-09-23 23:51:32 -07002646 << " " << dex_file.GetLocation() << " " << PrettyClass(klass) << " "
2647 << ClassHelper(klass).GetDescriptor();
Brian Carlstrom5b332c82012-02-01 15:02:31 -08002648
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002649 return false;
2650}
2651
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002652void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file,
2653 const SirtRef<mirror::Class>& klass) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002654 for (size_t i = 0; i < klass->NumDirectMethods(); i++) {
2655 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i));
2656 }
2657 for (size_t i = 0; i < klass->NumVirtualMethods(); i++) {
2658 ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i));
2659 }
2660}
2661
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002662void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file,
Brian Carlstromea46f952013-07-30 01:26:50 -07002663 mirror::ArtMethod* method) {
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002664 // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod.
2665 const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset());
2666 if (code_item == NULL) {
2667 return; // native or abstract method
2668 }
2669 if (code_item->tries_size_ == 0) {
2670 return; // nothing to process
2671 }
2672 const byte* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0);
2673 uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr);
2674 ClassLinker* linker = Runtime::Current()->GetClassLinker();
2675 for (uint32_t idx = 0; idx < handlers_size; idx++) {
2676 CatchHandlerIterator iterator(handlers_ptr);
2677 for (; iterator.HasNext(); iterator.Next()) {
2678 // Ensure exception types are resolved so that they don't need resolution to be delivered,
2679 // unresolved exception types will be ignored by exception delivery
2680 if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002681 mirror::Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method);
Brian Carlstrome7d856b2012-01-11 18:10:55 -08002682 if (exception_type == NULL) {
2683 DCHECK(Thread::Current()->IsExceptionPending());
2684 Thread::Current()->ClearException();
2685 }
2686 }
2687 }
2688 handlers_ptr = iterator.EndDataPointer();
2689 }
2690}
2691
Brian Carlstromea46f952013-07-30 01:26:50 -07002692static void CheckProxyConstructor(mirror::ArtMethod* constructor);
2693static void CheckProxyMethod(mirror::ArtMethod* method,
2694 SirtRef<mirror::ArtMethod>& prototype);
Ian Rogersc2b44472011-12-14 21:17:17 -08002695
Mathieu Chartier590fee92013-09-13 13:46:47 -07002696mirror::Class* ClassLinker::CreateProxyClass(ScopedObjectAccess& soa, jstring name,
2697 jobjectArray interfaces, jobject loader,
2698 jobjectArray methods, jobjectArray throws) {
2699 Thread* self = soa.Self();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002700 SirtRef<mirror::Class> klass(self, AllocClass(self, GetClassRoot(kJavaLangClass),
2701 sizeof(mirror::SynthesizedProxyClass)));
Ian Rogersa436fde2013-08-27 23:34:06 -07002702 if (klass.get() == NULL) {
2703 CHECK(self->IsExceptionPending()); // OOME.
2704 return NULL;
2705 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002706 DCHECK(klass->GetClass() != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002707 klass->SetObjectSize(sizeof(mirror::Proxy));
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002708 klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal);
Mathieu Chartier590fee92013-09-13 13:46:47 -07002709 klass->SetClassLoader(soa.Decode<mirror::ClassLoader*>(loader));
Ian Rogersc2b44472011-12-14 21:17:17 -08002710 DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot);
Mathieu Chartier590fee92013-09-13 13:46:47 -07002711 klass->SetName(soa.Decode<mirror::String*>(name));
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002712 mirror::Class* proxy_class = GetClassRoot(kJavaLangReflectProxy);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002713 klass->SetDexCache(proxy_class->GetDexCache());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002714 klass->SetStatus(mirror::Class::kStatusIdx, self);
Ian Rogersc2b44472011-12-14 21:17:17 -08002715
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002716 // Instance fields are inherited, but we add a couple of static fields...
Ian Rogersa436fde2013-08-27 23:34:06 -07002717 {
2718 mirror::ObjectArray<mirror::ArtField>* sfields = AllocArtFieldArray(self, 2);
2719 if (UNLIKELY(sfields == NULL)) {
2720 CHECK(self->IsExceptionPending()); // OOME.
2721 return NULL;
2722 }
2723 klass->SetSFields(sfields);
2724 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002725 // 1. Create a static field 'interfaces' that holds the _declared_ interfaces implemented by
2726 // our proxy, so Class.getInterfaces doesn't return the flattened set.
Brian Carlstromea46f952013-07-30 01:26:50 -07002727 SirtRef<mirror::ArtField> interfaces_sfield(self, AllocArtField(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07002728 if (UNLIKELY(interfaces_sfield.get() == NULL)) {
2729 CHECK(self->IsExceptionPending()); // OOME.
2730 return NULL;
2731 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002732 klass->SetStaticField(0, interfaces_sfield.get());
2733 interfaces_sfield->SetDexFieldIndex(0);
2734 interfaces_sfield->SetDeclaringClass(klass.get());
2735 interfaces_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
2736 // 2. Create a static field 'throws' that holds exceptions thrown by our methods.
Brian Carlstromea46f952013-07-30 01:26:50 -07002737 SirtRef<mirror::ArtField> throws_sfield(self, AllocArtField(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07002738 if (UNLIKELY(throws_sfield.get() == NULL)) {
2739 CHECK(self->IsExceptionPending()); // OOME.
2740 return NULL;
2741 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002742 klass->SetStaticField(1, throws_sfield.get());
2743 throws_sfield->SetDexFieldIndex(1);
2744 throws_sfield->SetDeclaringClass(klass.get());
2745 throws_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002746
Ian Rogers466bb252011-10-14 03:29:56 -07002747 // Proxies have 1 direct method, the constructor
Ian Rogersa436fde2013-08-27 23:34:06 -07002748 {
Mathieu Chartier590fee92013-09-13 13:46:47 -07002749 mirror::ObjectArray<mirror::ArtMethod>* directs = AllocArtMethodArray(self, 1);
Ian Rogersa436fde2013-08-27 23:34:06 -07002750 if (UNLIKELY(directs == NULL)) {
2751 CHECK(self->IsExceptionPending()); // OOME.
2752 return NULL;
2753 }
2754 klass->SetDirectMethods(directs);
2755 mirror::ArtMethod* constructor = CreateProxyConstructor(self, klass, proxy_class);
2756 if (UNLIKELY(constructor == NULL)) {
2757 CHECK(self->IsExceptionPending()); // OOME.
2758 return NULL;
2759 }
2760 klass->SetDirectMethod(0, constructor);
2761 }
Jesse Wilson95caa792011-10-12 18:14:17 -04002762
Mathieu Chartier590fee92013-09-13 13:46:47 -07002763 // Create virtual method using specified prototypes.
2764 size_t num_virtual_methods =
2765 soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods)->GetLength();
Ian Rogersa436fde2013-08-27 23:34:06 -07002766 {
Mathieu Chartier590fee92013-09-13 13:46:47 -07002767 mirror::ObjectArray<mirror::ArtMethod>* virtuals = AllocArtMethodArray(self, num_virtual_methods);
Ian Rogersa436fde2013-08-27 23:34:06 -07002768 if (UNLIKELY(virtuals == NULL)) {
2769 CHECK(self->IsExceptionPending()); // OOME.
2770 return NULL;
2771 }
2772 klass->SetVirtualMethods(virtuals);
2773 }
Jesse Wilson95caa792011-10-12 18:14:17 -04002774 for (size_t i = 0; i < num_virtual_methods; ++i) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07002775 mirror::ObjectArray<mirror::ArtMethod>* decoded_methods =
2776 soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods);
2777 SirtRef<mirror::ArtMethod> prototype(self, decoded_methods->Get(i));
Ian Rogersa436fde2013-08-27 23:34:06 -07002778 mirror::ArtMethod* clone = CreateProxyMethod(self, klass, prototype);
2779 if (UNLIKELY(clone == NULL)) {
2780 CHECK(self->IsExceptionPending()); // OOME.
2781 return NULL;
2782 }
2783 klass->SetVirtualMethod(i, clone);
Jesse Wilson95caa792011-10-12 18:14:17 -04002784 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002785
2786 klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002787 klass->SetStatus(mirror::Class::kStatusLoaded, self); // Class is now effectively in the loaded state
Ian Rogers62d6c772013-02-27 08:32:07 -08002788 self->AssertNoPendingException();
Ian Rogersc2b44472011-12-14 21:17:17 -08002789
Ian Rogersc8982582012-09-07 16:53:25 -07002790 {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002791 ObjectLock<mirror::Class> lock(self, &klass); // Must hold lock on object when resolved.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002792 // Link the fields and virtual methods, creating vtable and iftables
Mathieu Chartier590fee92013-09-13 13:46:47 -07002793 SirtRef<mirror::ObjectArray<mirror::Class> > sirt_interfaces(
2794 self, soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces));
2795 if (!LinkClass(self, klass, sirt_interfaces)) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002796 klass->SetStatus(mirror::Class::kStatusError, self);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002797 return nullptr;
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002798 }
2799
Mathieu Chartier590fee92013-09-13 13:46:47 -07002800 interfaces_sfield->SetObject(klass.get(), soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces));
2801 throws_sfield->SetObject(klass.get(), soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class> >*>(throws));
Ian Rogers7dfb28c2013-08-22 08:18:36 -07002802 klass->SetStatus(mirror::Class::kStatusInitialized, self);
Ian Rogersc8982582012-09-07 16:53:25 -07002803 }
Ian Rogersc2b44472011-12-14 21:17:17 -08002804
2805 // sanity checks
Elliott Hughes67d92002012-03-26 15:08:51 -07002806 if (kIsDebugBuild) {
Ian Rogersc2b44472011-12-14 21:17:17 -08002807 CHECK(klass->GetIFields() == NULL);
2808 CheckProxyConstructor(klass->GetDirectMethod(0));
2809 for (size_t i = 0; i < num_virtual_methods; ++i) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07002810 mirror::ObjectArray<mirror::ArtMethod>* decoded_methods =
2811 soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods);
2812 SirtRef<mirror::ArtMethod> prototype(self, decoded_methods->Get(i));
Ian Rogersc2b44472011-12-14 21:17:17 -08002813 CheckProxyMethod(klass->GetVirtualMethod(i), prototype);
2814 }
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002815
Mathieu Chartier590fee92013-09-13 13:46:47 -07002816 mirror::String* decoded_name = soa.Decode<mirror::String*>(name);
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002817 std::string interfaces_field_name(StringPrintf("java.lang.Class[] %s.interfaces",
Mathieu Chartier590fee92013-09-13 13:46:47 -07002818 decoded_name->ToModifiedUtf8().c_str()));
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002819 CHECK_EQ(PrettyField(klass->GetStaticField(0)), interfaces_field_name);
2820
2821 std::string throws_field_name(StringPrintf("java.lang.Class[][] %s.throws",
Mathieu Chartier590fee92013-09-13 13:46:47 -07002822 decoded_name->ToModifiedUtf8().c_str()));
Elliott Hughes2ed52c42012-03-21 16:56:56 -07002823 CHECK_EQ(PrettyField(klass->GetStaticField(1)), throws_field_name);
Ian Rogersc2b44472011-12-14 21:17:17 -08002824
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002825 mirror::SynthesizedProxyClass* synth_proxy_class =
2826 down_cast<mirror::SynthesizedProxyClass*>(klass.get());
Mathieu Chartier590fee92013-09-13 13:46:47 -07002827 CHECK_EQ(synth_proxy_class->GetInterfaces(), soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces));
2828 CHECK_EQ(synth_proxy_class->GetThrows(), soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class> >*>(throws));
Ian Rogersc2b44472011-12-14 21:17:17 -08002829 }
Mathieu Chartier31b9d662013-10-14 11:53:12 -07002830 std::string descriptor(GetDescriptorForProxy(klass.get()));
2831 mirror::Class* existing = InsertClass(descriptor.c_str(), klass.get(), Hash(descriptor.c_str()));
2832 CHECK(existing == nullptr);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002833 return klass.get();
Jesse Wilson95caa792011-10-12 18:14:17 -04002834}
2835
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002836std::string ClassLinker::GetDescriptorForProxy(const mirror::Class* proxy_class) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002837 DCHECK(proxy_class->IsProxyClass());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002838 mirror::String* name = proxy_class->GetName();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002839 DCHECK(name != NULL);
2840 return DotToDescriptor(name->ToModifiedUtf8().c_str());
2841}
2842
Brian Carlstromea46f952013-07-30 01:26:50 -07002843mirror::ArtMethod* ClassLinker::FindMethodForProxy(const mirror::Class* proxy_class,
2844 const mirror::ArtMethod* proxy_method) {
Ian Rogers16f93672012-02-14 12:29:06 -08002845 DCHECK(proxy_class->IsProxyClass());
2846 DCHECK(proxy_method->IsProxyMethod());
2847 // Locate the dex cache of the original interface/Object
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002848 mirror::DexCache* dex_cache = NULL;
Ian Rogers16f93672012-02-14 12:29:06 -08002849 {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002850 mirror::ObjectArray<mirror::Class>* resolved_types = proxy_method->GetDexCacheResolvedTypes();
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07002851 ReaderMutexLock mu(Thread::Current(), dex_lock_);
Ian Rogers16f93672012-02-14 12:29:06 -08002852 for (size_t i = 0; i != dex_caches_.size(); ++i) {
2853 if (dex_caches_[i]->GetResolvedTypes() == resolved_types) {
2854 dex_cache = dex_caches_[i];
2855 break;
2856 }
2857 }
2858 }
2859 CHECK(dex_cache != NULL);
2860 uint32_t method_idx = proxy_method->GetDexMethodIndex();
Brian Carlstromea46f952013-07-30 01:26:50 -07002861 mirror::ArtMethod* resolved_method = dex_cache->GetResolvedMethod(method_idx);
Ian Rogers16f93672012-02-14 12:29:06 -08002862 CHECK(resolved_method != NULL);
2863 return resolved_method;
2864}
2865
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002866
Brian Carlstromea46f952013-07-30 01:26:50 -07002867mirror::ArtMethod* ClassLinker::CreateProxyConstructor(Thread* self,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002868 const SirtRef<mirror::Class>& klass,
Brian Carlstromea46f952013-07-30 01:26:50 -07002869 mirror::Class* proxy_class) {
Ian Rogers466bb252011-10-14 03:29:56 -07002870 // Create constructor for Proxy that must initialize h
Brian Carlstromea46f952013-07-30 01:26:50 -07002871 mirror::ObjectArray<mirror::ArtMethod>* proxy_direct_methods =
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002872 proxy_class->GetDirectMethods();
Brian Carlstromea46f952013-07-30 01:26:50 -07002873 CHECK_EQ(proxy_direct_methods->GetLength(), 16);
2874 mirror::ArtMethod* proxy_constructor = proxy_direct_methods->Get(2);
Ian Rogers466bb252011-10-14 03:29:56 -07002875 // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its
2876 // code_ too)
Brian Carlstromea46f952013-07-30 01:26:50 -07002877 mirror::ArtMethod* constructor =
2878 down_cast<mirror::ArtMethod*>(proxy_constructor->Clone(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07002879 if (constructor == NULL) {
2880 CHECK(self->IsExceptionPending()); // OOME.
2881 return NULL;
2882 }
Ian Rogers466bb252011-10-14 03:29:56 -07002883 // Make this constructor public and fix the class to be our Proxy version
2884 constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic);
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002885 constructor->SetDeclaringClass(klass.get());
Ian Rogersc2b44472011-12-14 21:17:17 -08002886 return constructor;
2887}
2888
Brian Carlstromea46f952013-07-30 01:26:50 -07002889static void CheckProxyConstructor(mirror::ArtMethod* constructor)
Ian Rogersb726dcb2012-09-05 08:57:23 -07002890 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers466bb252011-10-14 03:29:56 -07002891 CHECK(constructor->IsConstructor());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002892 MethodHelper mh(constructor);
2893 CHECK_STREQ(mh.GetName(), "<init>");
Ian Rogersd91d6d62013-09-25 20:26:14 -07002894 CHECK_STREQ(mh.GetSignature().ToString().c_str(), "(Ljava/lang/reflect/InvocationHandler;)V");
Ian Rogers466bb252011-10-14 03:29:56 -07002895 DCHECK(constructor->IsPublic());
Jesse Wilson95caa792011-10-12 18:14:17 -04002896}
2897
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002898mirror::ArtMethod* ClassLinker::CreateProxyMethod(Thread* self,
2899 const SirtRef<mirror::Class>& klass,
2900 const SirtRef<mirror::ArtMethod>& prototype) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002901 // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden
2902 // prototype method
Ian Rogers16f93672012-02-14 12:29:06 -08002903 prototype->GetDeclaringClass()->GetDexCache()->SetResolvedMethod(prototype->GetDexMethodIndex(),
2904 prototype.get());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002905 // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize
Ian Rogers466bb252011-10-14 03:29:56 -07002906 // as necessary
Brian Carlstromea46f952013-07-30 01:26:50 -07002907 mirror::ArtMethod* method = down_cast<mirror::ArtMethod*>(prototype->Clone(self));
Ian Rogersa436fde2013-08-27 23:34:06 -07002908 if (UNLIKELY(method == NULL)) {
2909 CHECK(self->IsExceptionPending()); // OOME.
2910 return NULL;
2911 }
Ian Rogers466bb252011-10-14 03:29:56 -07002912
2913 // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to
2914 // the intersection of throw exceptions as defined in Proxy
Brian Carlstrom40381fb2011-10-19 14:13:40 -07002915 method->SetDeclaringClass(klass.get());
Ian Rogers466bb252011-10-14 03:29:56 -07002916 method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal);
Jesse Wilson95caa792011-10-12 18:14:17 -04002917
Ian Rogers466bb252011-10-14 03:29:56 -07002918 // At runtime the method looks like a reference and argument saving method, clone the code
2919 // related parameters from this method.
Brian Carlstromea46f952013-07-30 01:26:50 -07002920 mirror::ArtMethod* refs_and_args =
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08002921 Runtime::Current()->GetCalleeSaveMethod(Runtime::kRefsAndArgs);
Ian Rogers466bb252011-10-14 03:29:56 -07002922 method->SetCoreSpillMask(refs_and_args->GetCoreSpillMask());
2923 method->SetFpSpillMask(refs_and_args->GetFpSpillMask());
2924 method->SetFrameSizeInBytes(refs_and_args->GetFrameSizeInBytes());
Ian Rogers848871b2013-08-05 10:56:33 -07002925 method->SetEntryPointFromCompiledCode(GetProxyInvokeHandler());
Dragos Sbirlea08bf1962013-08-12 08:53:04 -07002926 method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
Ian Rogers16f93672012-02-14 12:29:06 -08002927
Ian Rogersc2b44472011-12-14 21:17:17 -08002928 return method;
2929}
Jesse Wilson95caa792011-10-12 18:14:17 -04002930
Brian Carlstromea46f952013-07-30 01:26:50 -07002931static void CheckProxyMethod(mirror::ArtMethod* method,
2932 SirtRef<mirror::ArtMethod>& prototype)
Ian Rogersb726dcb2012-09-05 08:57:23 -07002933 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Ian Rogers466bb252011-10-14 03:29:56 -07002934 // Basic sanity
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002935 CHECK(!prototype->IsFinal());
2936 CHECK(method->IsFinal());
2937 CHECK(!method->IsAbstract());
Ian Rogers19846512012-02-24 11:42:47 -08002938
2939 // The proxy method doesn't have its own dex cache or dex file and so it steals those of its
2940 // interface prototype. The exception to this are Constructors and the Class of the Proxy itself.
2941 CHECK_EQ(prototype->GetDexCacheStrings(), method->GetDexCacheStrings());
2942 CHECK_EQ(prototype->GetDexCacheResolvedMethods(), method->GetDexCacheResolvedMethods());
2943 CHECK_EQ(prototype->GetDexCacheResolvedTypes(), method->GetDexCacheResolvedTypes());
2944 CHECK_EQ(prototype->GetDexCacheInitializedStaticStorage(),
2945 method->GetDexCacheInitializedStaticStorage());
2946 CHECK_EQ(prototype->GetDexMethodIndex(), method->GetDexMethodIndex());
2947
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08002948 MethodHelper mh(method);
Ian Rogers19846512012-02-24 11:42:47 -08002949 MethodHelper mh2(prototype.get());
2950 CHECK_STREQ(mh.GetName(), mh2.GetName());
2951 CHECK_STREQ(mh.GetShorty(), mh2.GetShorty());
Ian Rogers466bb252011-10-14 03:29:56 -07002952 // More complex sanity - via dex cache
Ian Rogers19846512012-02-24 11:42:47 -08002953 CHECK_EQ(mh.GetReturnType(), mh2.GetReturnType());
Jesse Wilson95caa792011-10-12 18:14:17 -04002954}
2955
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002956static bool CanWeInitializeClass(mirror::Class* klass, bool can_init_statics,
2957 bool can_init_parents)
2958 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Brian Carlstrom610e49f2013-11-04 17:07:22 -08002959 if (can_init_statics && can_init_parents) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002960 return true;
2961 }
2962 if (!can_init_statics) {
2963 // Check if there's a class initializer.
Ian Rogersd91d6d62013-09-25 20:26:14 -07002964 mirror::ArtMethod* clinit = klass->FindClassInitializer();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002965 if (clinit != NULL) {
2966 return false;
2967 }
2968 // Check if there are encoded static values needing initialization.
2969 if (klass->NumStaticFields() != 0) {
2970 ClassHelper kh(klass);
2971 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
2972 DCHECK(dex_class_def != NULL);
2973 if (dex_class_def->static_values_off_ != 0) {
2974 return false;
2975 }
2976 }
2977 }
2978 if (!klass->IsInterface() && klass->HasSuperClass()) {
2979 mirror::Class* super_class = klass->GetSuperClass();
2980 if (!can_init_parents && !super_class->IsInitialized()) {
2981 return false;
2982 } else {
Brian Carlstrom610e49f2013-11-04 17:07:22 -08002983 if (!CanWeInitializeClass(super_class, can_init_statics, can_init_parents)) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002984 return false;
2985 }
2986 }
2987 }
2988 return true;
2989}
2990
Mathieu Chartier590fee92013-09-13 13:46:47 -07002991bool ClassLinker::IsInitialized() const {
2992 return init_done_;
2993}
2994
Mathieu Chartierc528dba2013-11-26 12:00:11 -08002995bool ClassLinker::InitializeClass(const SirtRef<mirror::Class>& klass, bool can_init_statics,
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07002996 bool can_init_parents) {
2997 // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol
2998
2999 // Are we already initialized and therefore done?
3000 // Note: we differ from the JLS here as we don't do this under the lock, this is benign as
3001 // an initialized class will never change its state.
3002 if (klass->IsInitialized()) {
3003 return true;
3004 }
3005
3006 // Fast fail if initialization requires a full runtime. Not part of the JLS.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003007 if (!CanWeInitializeClass(klass.get(), can_init_statics, can_init_parents)) {
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003008 return false;
3009 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003010
Carl Shapirob5573532011-07-12 18:22:59 -07003011 Thread* self = Thread::Current();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003012 uint64_t t0;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003013 {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003014 ObjectLock<mirror::Class> lock(self, &klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003015
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003016 // Re-check under the lock in case another thread initialized ahead of us.
3017 if (klass->IsInitialized()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003018 return true;
3019 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003020
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003021 // Was the class already found to be erroneous? Done under the lock to match the JLS.
Brian Carlstromd1422f82011-09-28 11:37:09 -07003022 if (klass->IsErroneous()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003023 ThrowEarlierClassFailure(klass.get());
Brian Carlstromd1422f82011-09-28 11:37:09 -07003024 return false;
3025 }
3026
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003027 CHECK(klass->IsResolved()) << PrettyClass(klass.get()) << ": state=" << klass->GetStatus();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003028
3029 if (!klass->IsVerified()) {
jeffhao98eacac2011-09-14 16:11:53 -07003030 VerifyClass(klass);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003031 if (!klass->IsVerified()) {
3032 // We failed to verify, expect either the klass to be erroneous or verification failed at
3033 // compile time.
3034 if (klass->IsErroneous()) {
jeffhaoa9b3bf42012-06-06 17:18:39 -07003035 CHECK(self->IsExceptionPending());
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003036 } else {
3037 CHECK(Runtime::Current()->IsCompiler());
3038 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime);
jeffhaoa9b3bf42012-06-06 17:18:39 -07003039 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003040 return false;
3041 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003042 }
3043
Brian Carlstromd1422f82011-09-28 11:37:09 -07003044 // If the class is kStatusInitializing, either this thread is
3045 // initializing higher up the stack or another thread has beat us
3046 // to initializing and we need to wait. Either way, this
3047 // invocation of InitializeClass will not be responsible for
3048 // running <clinit> and will return.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003049 if (klass->GetStatus() == mirror::Class::kStatusInitializing) {
Elliott Hughes005ab2e2011-09-11 17:15:31 -07003050 // We caught somebody else in the act; was it us?
Elliott Hughesdcc24742011-09-07 14:02:44 -07003051 if (klass->GetClinitThreadId() == self->GetTid()) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003052 // Yes. That's fine. Return so we can continue initializing.
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003053 return true;
3054 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07003055 // No. That's fine. Wait for another thread to finish initializing.
3056 return WaitForInitializeClass(klass, self, lock);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003057 }
3058
3059 if (!ValidateSuperClassDescriptors(klass)) {
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003060 klass->SetStatus(mirror::Class::kStatusError, self);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003061 return false;
3062 }
3063
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003064 CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusVerified) << PrettyClass(klass.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003065
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003066 // From here out other threads may observe that we're initializing and so changes of state
3067 // require the a notification.
Elliott Hughesdcc24742011-09-07 14:02:44 -07003068 klass->SetClinitThreadId(self->GetTid());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003069 klass->SetStatus(mirror::Class::kStatusInitializing, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003070
3071 t0 = NanoTime();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003072 }
3073
Brian Carlstrom6d3f72c2013-08-21 18:06:34 -07003074 // Initialize super classes, must be done while initializing for the JLS.
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003075 if (!klass->IsInterface() && klass->HasSuperClass()) {
3076 mirror::Class* super_class = klass->GetSuperClass();
3077 if (!super_class->IsInitialized()) {
3078 CHECK(!super_class->IsInterface());
3079 CHECK(can_init_parents);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003080 SirtRef<mirror::Class> sirt_super(self, super_class);
3081 bool super_initialized = InitializeClass(sirt_super, can_init_statics, true);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003082 if (!super_initialized) {
3083 // The super class was verified ahead of entering initializing, we should only be here if
3084 // the super class became erroneous due to initialization.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003085 CHECK(sirt_super->IsErroneous() && self->IsExceptionPending())
3086 << "Super class initialization failed for " << PrettyDescriptor(sirt_super.get())
3087 << " that has unexpected status " << sirt_super->GetStatus()
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003088 << "\nPending exception:\n"
3089 << (self->GetException(NULL) != NULL ? self->GetException(NULL)->Dump() : "");
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003090 ObjectLock<mirror::Class> lock(self, &klass);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003091 // Initialization failed because the super-class is erroneous.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003092 klass->SetStatus(mirror::Class::kStatusError, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003093 return false;
3094 }
Ian Rogers1bddec32012-02-04 12:27:34 -08003095 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003096 }
3097
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003098 if (klass->NumStaticFields() > 0) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003099 ClassHelper kh(klass.get());
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003100 const DexFile::ClassDef* dex_class_def = kh.GetClassDef();
3101 CHECK(dex_class_def != NULL);
3102 const DexFile& dex_file = kh.GetDexFile();
Mathieu Chartier590fee92013-09-13 13:46:47 -07003103 SirtRef<mirror::ClassLoader> class_loader(self, klass->GetClassLoader());
3104 SirtRef<mirror::DexCache> dex_cache(self, kh.GetDexCache());
3105 EncodedStaticFieldValueIterator it(dex_file, &dex_cache, &class_loader,
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003106 this, *dex_class_def);
3107 if (it.HasNext()) {
3108 CHECK(can_init_statics);
3109 // We reordered the fields, so we need to be able to map the field indexes to the right fields.
3110 SafeMap<uint32_t, mirror::ArtField*> field_map;
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003111 ConstructFieldMap(dex_file, *dex_class_def, klass.get(), field_map);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003112 for (size_t i = 0; it.HasNext(); i++, it.Next()) {
3113 it.ReadValueToField(field_map.Get(i));
3114 }
3115 }
3116 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003117
Ian Rogersd91d6d62013-09-25 20:26:14 -07003118 mirror::ArtMethod* clinit = klass->FindClassInitializer();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003119 if (clinit != NULL) {
3120 CHECK(can_init_statics);
3121 if (LIKELY(Runtime::Current()->IsStarted())) {
Jeff Hao5d917302013-02-27 17:57:33 -08003122 JValue result;
Jeff Hao6474d192013-03-26 14:08:09 -07003123 clinit->Invoke(self, NULL, 0, &result, 'V');
Ian Rogers64b6d142012-10-29 16:34:15 -07003124 } else {
Jeff Hao6474d192013-03-26 14:08:09 -07003125 art::interpreter::EnterInterpreterFromInvoke(self, clinit, NULL, NULL, NULL);
Ian Rogers64b6d142012-10-29 16:34:15 -07003126 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003127 }
3128
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003129 // Opportunistically set static method trampolines to their destination.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003130 FixupStaticTrampolines(klass.get());
Ian Rogers19846512012-02-24 11:42:47 -08003131
Elliott Hughes83df2ac2011-10-11 16:37:54 -07003132 uint64_t t1 = NanoTime();
3133
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003134 bool success = true;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003135 {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003136 ObjectLock<mirror::Class> lock(self, &klass);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003137
3138 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07003139 WrapExceptionInInitializer();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003140 klass->SetStatus(mirror::Class::kStatusError, self);
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003141 success = false;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003142 } else {
Elliott Hughes83df2ac2011-10-11 16:37:54 -07003143 RuntimeStats* global_stats = Runtime::Current()->GetStats();
3144 RuntimeStats* thread_stats = self->GetStats();
3145 ++global_stats->class_init_count;
3146 ++thread_stats->class_init_count;
3147 global_stats->class_init_time_ns += (t1 - t0);
3148 thread_stats->class_init_time_ns += (t1 - t0);
Ian Rogerse6bb3b22013-08-19 21:51:45 -07003149 // Set the class as initialized except if failed to initialize static fields.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003150 klass->SetStatus(mirror::Class::kStatusInitialized, self);
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003151 if (VLOG_IS_ON(class_linker)) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003152 ClassHelper kh(klass.get());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003153 LOG(INFO) << "Initialized class " << kh.GetDescriptor() << " from " << kh.GetLocation();
Brian Carlstromae826982011-11-09 01:33:42 -08003154 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003155 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003156 }
Ian Rogersbdfb1a52012-01-12 14:05:22 -08003157 return success;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003158}
3159
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003160bool ClassLinker::WaitForInitializeClass(const SirtRef<mirror::Class>& klass, Thread* self,
3161 ObjectLock<mirror::Class>& lock)
Ian Rogersb726dcb2012-09-05 08:57:23 -07003162 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003163 while (true) {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07003164 self->AssertNoPendingException();
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003165 CHECK(!klass->IsInitialized());
Ian Rogers05f30572013-02-20 12:13:11 -08003166 lock.WaitIgnoringInterrupts();
Brian Carlstromd1422f82011-09-28 11:37:09 -07003167
3168 // When we wake up, repeat the test for init-in-progress. If
3169 // there's an exception pending (only possible if
3170 // "interruptShouldThrow" was set), bail out.
3171 if (self->IsExceptionPending()) {
Elliott Hughes4d0207c2011-10-03 19:14:34 -07003172 WrapExceptionInInitializer();
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003173 klass->SetStatus(mirror::Class::kStatusError, self);
Brian Carlstromd1422f82011-09-28 11:37:09 -07003174 return false;
3175 }
3176 // Spurious wakeup? Go back to waiting.
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003177 if (klass->GetStatus() == mirror::Class::kStatusInitializing) {
Brian Carlstromd1422f82011-09-28 11:37:09 -07003178 continue;
3179 }
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003180 if (klass->GetStatus() == mirror::Class::kStatusVerified && Runtime::Current()->IsCompiler()) {
Ian Rogers3d1548d2012-09-24 14:08:03 -07003181 // Compile time initialization failed.
3182 return false;
3183 }
Brian Carlstromd1422f82011-09-28 11:37:09 -07003184 if (klass->IsErroneous()) {
3185 // The caller wants an exception, but it was thrown in a
3186 // different thread. Synthesize one here.
Brian Carlstromdf143242011-10-10 18:05:34 -07003187 ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread",
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003188 PrettyDescriptor(klass.get()).c_str());
Brian Carlstromd1422f82011-09-28 11:37:09 -07003189 return false;
3190 }
3191 if (klass->IsInitialized()) {
3192 return true;
3193 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003194 LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass.get()) << " is "
3195 << klass->GetStatus();
Brian Carlstromd1422f82011-09-28 11:37:09 -07003196 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003197 LOG(FATAL) << "Not Reached" << PrettyClass(klass.get());
Brian Carlstromd1422f82011-09-28 11:37:09 -07003198}
3199
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003200bool ClassLinker::ValidateSuperClassDescriptors(const SirtRef<mirror::Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003201 if (klass->IsInterface()) {
3202 return true;
3203 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003204 Thread* self = Thread::Current();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003205 // begin with the methods local to the superclass
3206 if (klass->HasSuperClass() &&
3207 klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003208 SirtRef<mirror::Class> super(self, klass->GetSuperClass());
Ian Rogers595799e2012-01-11 17:32:51 -08003209 for (int i = super->GetVTable()->GetLength() - 1; i >= 0; --i) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003210 const mirror::ArtMethod* method = klass->GetVTable()->Get(i);
Ian Rogers595799e2012-01-11 17:32:51 -08003211 if (method != super->GetVTable()->Get(i) &&
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003212 !IsSameMethodSignatureInDifferentClassContexts(method, super.get(), klass.get())) {
3213 ThrowLinkageError(klass.get(), "Class %s method %s resolves differently in superclass %s",
3214 PrettyDescriptor(klass.get()).c_str(), PrettyMethod(method).c_str(),
3215 PrettyDescriptor(super.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003216 return false;
3217 }
3218 }
3219 }
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003220 for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003221 SirtRef<mirror::Class> interface(self, klass->GetIfTable()->GetInterface(i));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003222 if (klass->GetClassLoader() != interface->GetClassLoader()) {
3223 for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003224 const mirror::ArtMethod* method = klass->GetIfTable()->GetMethodArray(i)->Get(j);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003225 if (!IsSameMethodSignatureInDifferentClassContexts(method, interface.get(),
Ian Rogers595799e2012-01-11 17:32:51 -08003226 method->GetDeclaringClass())) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003227 ThrowLinkageError(klass.get(), "Class %s method %s resolves differently in interface %s",
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003228 PrettyDescriptor(method->GetDeclaringClass()).c_str(),
3229 PrettyMethod(method).c_str(),
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003230 PrettyDescriptor(interface.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003231 return false;
3232 }
3233 }
3234 }
3235 }
3236 return true;
3237}
3238
Ian Rogers595799e2012-01-11 17:32:51 -08003239// Returns true if classes referenced by the signature of the method are the
3240// same classes in klass1 as they are in klass2.
Brian Carlstromea46f952013-07-30 01:26:50 -07003241bool ClassLinker::IsSameMethodSignatureInDifferentClassContexts(const mirror::ArtMethod* method,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003242 const mirror::Class* klass1,
3243 const mirror::Class* klass2) {
Ian Rogers9074b992011-10-26 17:41:55 -07003244 if (klass1 == klass2) {
3245 return true;
Brian Carlstrome10b6972011-09-26 13:49:03 -07003246 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003247 Thread* self = Thread::Current();
3248 CHECK(klass1 != nullptr);
3249 CHECK(klass2 != nullptr);
3250 SirtRef<mirror::ClassLoader> loader1(self, klass1->GetClassLoader());
3251 SirtRef<mirror::ClassLoader> loader2(self, klass2->GetClassLoader());
Ian Rogers4445a7e2012-10-05 17:19:13 -07003252 const DexFile& dex_file = *method->GetDeclaringClass()->GetDexCache()->GetDexFile();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003253 const DexFile::ProtoId& proto_id =
3254 dex_file.GetMethodPrototype(dex_file.GetMethodId(method->GetDexMethodIndex()));
Ian Rogers0571d352011-11-03 19:51:38 -07003255 for (DexFileParameterIterator it(dex_file, proto_id); it.HasNext(); it.Next()) {
3256 const char* descriptor = it.GetDescriptor();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003257 if (descriptor == nullptr) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003258 break;
3259 }
3260 if (descriptor[0] == 'L' || descriptor[0] == '[') {
3261 // Found a non-primitive type.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003262 if (!IsSameDescriptorInDifferentClassContexts(descriptor, loader1, loader2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003263 return false;
3264 }
3265 }
3266 }
3267 // Check the return type
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07003268 const char* descriptor = dex_file.GetReturnTypeDescriptor(proto_id);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003269 if (descriptor[0] == 'L' || descriptor[0] == '[') {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003270 if (!IsSameDescriptorInDifferentClassContexts(descriptor, loader1, loader2)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003271 return false;
3272 }
3273 }
3274 return true;
3275}
3276
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003277// Returns true if the descriptor resolves to the same class in the context of loader1 and loader2.
Ian Rogers595799e2012-01-11 17:32:51 -08003278bool ClassLinker::IsSameDescriptorInDifferentClassContexts(const char* descriptor,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003279 SirtRef<mirror::ClassLoader>& loader1,
3280 SirtRef<mirror::ClassLoader>& loader2) {
3281 CHECK(descriptor != nullptr);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003282 Thread* self = Thread::Current();
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003283 SirtRef<mirror::Class> found1(self, FindClass(descriptor, loader1));
3284 if (found1.get() == nullptr) {
3285 self->ClearException();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003286 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003287 mirror::Class* found2 = FindClass(descriptor, loader2);
3288 if (found2 == nullptr) {
3289 self->ClearException();
Ian Rogers595799e2012-01-11 17:32:51 -08003290 }
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003291 return found1.get() == found2;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003292}
3293
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003294bool ClassLinker::EnsureInitialized(const SirtRef<mirror::Class>& c, bool can_init_fields,
3295 bool can_init_parents) {
3296 DCHECK(c.get() != NULL);
Elliott Hughesf4c21c92011-08-19 17:31:31 -07003297 if (c->IsInitialized()) {
3298 return true;
3299 }
3300
Ian Rogers8f3c9ae2013-08-20 17:26:41 -07003301 bool success = InitializeClass(c, can_init_fields, can_init_parents);
Ian Rogers595799e2012-01-11 17:32:51 -08003302 if (!success) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003303 if (can_init_fields && can_init_parents) {
3304 CHECK(Thread::Current()->IsExceptionPending()) << PrettyClass(c.get());
3305 }
Ian Rogers595799e2012-01-11 17:32:51 -08003306 }
3307 return success;
Elliott Hughesf4c21c92011-08-19 17:31:31 -07003308}
3309
Elliott Hughes5fe594f2011-09-08 12:33:17 -07003310void ClassLinker::ConstructFieldMap(const DexFile& dex_file, const DexFile::ClassDef& dex_class_def,
Mathieu Chartier590fee92013-09-13 13:46:47 -07003311 mirror::Class* c,
3312 SafeMap<uint32_t, mirror::ArtField*>& field_map) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07003313 const byte* class_data = dex_file.GetClassData(dex_class_def);
Ian Rogers0571d352011-11-03 19:51:38 -07003314 ClassDataItemIterator it(dex_file, class_data);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003315 Thread* self = Thread::Current();
3316 SirtRef<mirror::DexCache> dex_cache(self, c->GetDexCache());
3317 SirtRef<mirror::ClassLoader> class_loader(self, c->GetClassLoader());
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003318 CHECK(!kMovingFields);
Ian Rogers0571d352011-11-03 19:51:38 -07003319 for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003320 field_map.Put(i, ResolveField(dex_file, it.GetMemberIndex(), dex_cache, class_loader, true));
Elliott Hughes5fe594f2011-09-08 12:33:17 -07003321 }
3322}
3323
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003324bool ClassLinker::LinkClass(Thread* self, const SirtRef<mirror::Class>& klass,
3325 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003326 CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003327 if (!LinkSuperClass(klass)) {
3328 return false;
3329 }
Ian Rogersc2b44472011-12-14 21:17:17 -08003330 if (!LinkMethods(klass, interfaces)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003331 return false;
3332 }
3333 if (!LinkInstanceFields(klass)) {
3334 return false;
3335 }
Brian Carlstrom4873d462011-08-21 15:23:39 -07003336 if (!LinkStaticFields(klass)) {
3337 return false;
3338 }
3339 CreateReferenceInstanceOffsets(klass);
3340 CreateReferenceStaticOffsets(klass);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003341 CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus());
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003342 klass->SetStatus(mirror::Class::kStatusResolved, self);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003343 return true;
3344}
3345
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003346bool ClassLinker::LoadSuperAndInterfaces(const SirtRef<mirror::Class>& klass,
3347 const DexFile& dex_file) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003348 CHECK_EQ(mirror::Class::kStatusIdx, klass->GetStatus());
Ian Rogers8b2c0b92013-09-19 02:56:49 -07003349 const DexFile::ClassDef& class_def = dex_file.GetClassDef(klass->GetDexClassDefIndex());
3350 uint16_t super_class_idx = class_def.superclass_idx_;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003351 if (super_class_idx != DexFile::kDexNoIndex16) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003352 mirror::Class* super_class = ResolveType(dex_file, super_class_idx, klass.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003353 if (super_class == NULL) {
Brian Carlstrom65ca0772011-09-24 16:03:08 -07003354 DCHECK(Thread::Current()->IsExceptionPending());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003355 return false;
3356 }
Ian Rogersbe125a92012-01-11 15:19:49 -08003357 // Verify
3358 if (!klass->CanAccess(super_class)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003359 ThrowIllegalAccessError(klass.get(), "Class %s extended by class %s is inaccessible",
3360 PrettyDescriptor(super_class).c_str(),
3361 PrettyDescriptor(klass.get()).c_str());
Ian Rogersbe125a92012-01-11 15:19:49 -08003362 return false;
3363 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003364 klass->SetSuperClass(super_class);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003365 }
Ian Rogers8b2c0b92013-09-19 02:56:49 -07003366 const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(class_def);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003367 if (interfaces != NULL) {
3368 for (size_t i = 0; i < interfaces->Size(); i++) {
3369 uint16_t idx = interfaces->GetTypeItem(i).type_idx_;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003370 mirror::Class* interface = ResolveType(dex_file, idx, klass.get());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003371 if (interface == NULL) {
3372 DCHECK(Thread::Current()->IsExceptionPending());
3373 return false;
3374 }
3375 // Verify
3376 if (!klass->CanAccess(interface)) {
3377 // TODO: the RI seemed to ignore this in my testing.
Ian Rogers62d6c772013-02-27 08:32:07 -08003378 ThrowIllegalAccessError(klass.get(), "Interface %s implemented by class %s is inaccessible",
3379 PrettyDescriptor(interface).c_str(),
3380 PrettyDescriptor(klass.get()).c_str());
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003381 return false;
3382 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003383 }
3384 }
Brian Carlstrom74eb46a2011-08-02 20:10:14 -07003385 // Mark the class as loaded.
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003386 klass->SetStatus(mirror::Class::kStatusLoaded, NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003387 return true;
3388}
3389
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003390bool ClassLinker::LinkSuperClass(const SirtRef<mirror::Class>& klass) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003391 CHECK(!klass->IsPrimitive());
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003392 mirror::Class* super = klass->GetSuperClass();
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003393 if (klass.get() == GetClassRoot(kJavaLangObject)) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003394 if (super != NULL) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003395 ThrowClassFormatError(klass.get(), "java.lang.Object must not have a superclass");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003396 return false;
3397 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003398 return true;
3399 }
3400 if (super == NULL) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003401 ThrowLinkageError(klass.get(), "No superclass defined for class %s",
3402 PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003403 return false;
3404 }
3405 // Verify
Elliott Hughes4a2b4172011-09-20 17:08:25 -07003406 if (super->IsFinal() || super->IsInterface()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003407 ThrowIncompatibleClassChangeError(klass.get(), "Superclass %s of %s is %s",
3408 PrettyDescriptor(super).c_str(),
3409 PrettyDescriptor(klass.get()).c_str(),
3410 super->IsFinal() ? "declared final" : "an interface");
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003411 return false;
3412 }
3413 if (!klass->CanAccess(super)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003414 ThrowIllegalAccessError(klass.get(), "Superclass %s is inaccessible to class %s",
3415 PrettyDescriptor(super).c_str(),
3416 PrettyDescriptor(klass.get()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003417 return false;
3418 }
Elliott Hughes20cde902011-10-04 17:37:27 -07003419
3420 // Inherit kAccClassIsFinalizable from the superclass in case this class doesn't override finalize.
3421 if (super->IsFinalizable()) {
3422 klass->SetFinalizable();
3423 }
3424
Elliott Hughes2da50362011-10-10 16:57:08 -07003425 // Inherit reference flags (if any) from the superclass.
3426 int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask);
3427 if (reference_flags != 0) {
3428 klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags);
3429 }
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07003430 // Disallow custom direct subclasses of java.lang.ref.Reference.
Elliott Hughesbf61ba32011-10-11 10:53:09 -07003431 if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003432 ThrowLinkageError(klass.get(),
3433 "Class %s attempts to subclass java.lang.ref.Reference, which is not allowed",
3434 PrettyDescriptor(klass.get()).c_str());
Elliott Hughes72ee0ae2011-10-10 17:31:28 -07003435 return false;
3436 }
Elliott Hughes2da50362011-10-10 16:57:08 -07003437
Ian Rogers7dfb28c2013-08-22 08:18:36 -07003438 if (kIsDebugBuild) {
3439 // Ensure super classes are fully resolved prior to resolving fields..
3440 while (super != NULL) {
3441 CHECK(super->IsResolved());
3442 super = super->GetSuperClass();
3443 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003444 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003445 return true;
3446}
3447
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003448// Populate the class vtable and itable. Compute return type indices.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003449bool ClassLinker::LinkMethods(const SirtRef<mirror::Class>& klass,
3450 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003451 if (klass->IsInterface()) {
3452 // No vtable.
3453 size_t count = klass->NumVirtualMethods();
3454 if (!IsUint(16, count)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003455 ThrowClassFormatError(klass.get(), "Too many methods on interface: %zd", count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003456 return false;
3457 }
Carl Shapiro565f5072011-07-10 13:39:43 -07003458 for (size_t i = 0; i < count; ++i) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003459 klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003460 }
jeffhaobdb76512011-09-07 11:43:16 -07003461 // Link interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003462 return LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003463 } else {
Elliott Hughesbc258fa2011-10-06 14:45:21 -07003464 // Link virtual and interface method tables
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003465 return LinkVirtualMethods(klass) && LinkInterfaceMethods(klass, interfaces);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003466 }
3467 return true;
3468}
3469
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003470bool ClassLinker::LinkVirtualMethods(const SirtRef<mirror::Class>& klass) {
Ian Rogers1f539342012-10-03 21:09:42 -07003471 Thread* self = Thread::Current();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003472 if (klass->HasSuperClass()) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003473 uint32_t max_count = klass->NumVirtualMethods() + klass->GetSuperClass()->GetVTable()->GetLength();
3474 size_t actual_count = klass->GetSuperClass()->GetVTable()->GetLength();
Brian Carlstrom4a96b602011-07-26 16:40:23 -07003475 CHECK_LE(actual_count, max_count);
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07003476 // TODO: do not assign to the vtable field until it is fully constructed.
Brian Carlstromea46f952013-07-30 01:26:50 -07003477 SirtRef<mirror::ObjectArray<mirror::ArtMethod> >
Ian Rogers50b35e22012-10-04 10:09:15 -07003478 vtable(self, klass->GetSuperClass()->GetVTable()->CopyOf(self, max_count));
Ian Rogersa436fde2013-08-27 23:34:06 -07003479 if (UNLIKELY(vtable.get() == NULL)) {
3480 CHECK(self->IsExceptionPending()); // OOME.
3481 return false;
3482 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003483 // See if any of our virtual methods override the superclass.
3484 for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003485 mirror::ArtMethod* local_method = klass->GetVirtualMethodDuringLinking(i);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003486 MethodHelper local_mh(local_method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003487 size_t j = 0;
Brian Carlstrom4a96b602011-07-26 16:40:23 -07003488 for (; j < actual_count; ++j) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003489 mirror::ArtMethod* super_method = vtable->Get(j);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003490 MethodHelper super_mh(super_method);
Elliott Hughes39717372012-07-13 16:21:23 -07003491 if (local_mh.HasSameNameAndSignature(&super_mh)) {
3492 if (klass->CanAccessMember(super_method->GetDeclaringClass(), super_method->GetAccessFlags())) {
3493 if (super_method->IsFinal()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003494 ThrowLinkageError(klass.get(), "Method %s overrides final method in class %s",
Elliott Hughes39717372012-07-13 16:21:23 -07003495 PrettyMethod(local_method).c_str(),
3496 super_mh.GetDeclaringClassDescriptor());
3497 return false;
3498 }
3499 vtable->Set(j, local_method);
3500 local_method->SetMethodIndex(j);
3501 break;
3502 } else {
3503 LOG(WARNING) << "Before Android 4.1, method " << PrettyMethod(local_method)
3504 << " would have incorrectly overridden the package-private method in "
3505 << PrettyDescriptor(super_mh.GetDeclaringClassDescriptor());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003506 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003507 }
3508 }
Brian Carlstrom4a96b602011-07-26 16:40:23 -07003509 if (j == actual_count) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003510 // Not overriding, append.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003511 vtable->Set(actual_count, local_method);
3512 local_method->SetMethodIndex(actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003513 actual_count += 1;
3514 }
3515 }
3516 if (!IsUint(16, actual_count)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003517 ThrowClassFormatError(klass.get(), "Too many methods defined on class: %zd", actual_count);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003518 return false;
3519 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003520 // Shrink vtable if possible
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003521 CHECK_LE(actual_count, max_count);
3522 if (actual_count < max_count) {
Ian Rogers50b35e22012-10-04 10:09:15 -07003523 vtable.reset(vtable->CopyOf(self, actual_count));
Ian Rogersa436fde2013-08-27 23:34:06 -07003524 if (UNLIKELY(vtable.get() == NULL)) {
3525 CHECK(self->IsExceptionPending()); // OOME.
3526 return false;
3527 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003528 }
Ian Rogers30fab402012-01-23 15:43:46 -08003529 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003530 } else {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003531 CHECK(klass.get() == GetClassRoot(kJavaLangObject));
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07003532 uint32_t num_virtual_methods = klass->NumVirtualMethods();
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07003533 if (!IsUint(16, num_virtual_methods)) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003534 ThrowClassFormatError(klass.get(), "Too many methods: %d", num_virtual_methods);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003535 return false;
3536 }
Brian Carlstromea46f952013-07-30 01:26:50 -07003537 SirtRef<mirror::ObjectArray<mirror::ArtMethod> >
3538 vtable(self, AllocArtMethodArray(self, num_virtual_methods));
Ian Rogersa436fde2013-08-27 23:34:06 -07003539 if (UNLIKELY(vtable.get() == NULL)) {
3540 CHECK(self->IsExceptionPending()); // OOME.
3541 return false;
3542 }
Brian Carlstroma40f9bc2011-07-26 21:26:07 -07003543 for (size_t i = 0; i < num_virtual_methods; ++i) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003544 mirror::ArtMethod* virtual_method = klass->GetVirtualMethodDuringLinking(i);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003545 vtable->Set(i, virtual_method);
3546 virtual_method->SetMethodIndex(i & 0xFFFF);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003547 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003548 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003549 }
3550 return true;
3551}
3552
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003553bool ClassLinker::LinkInterfaceMethods(const SirtRef<mirror::Class>& klass,
3554 const SirtRef<mirror::ObjectArray<mirror::Class> >& interfaces) {
Jeff Hao88474b42013-10-23 16:24:40 -07003555 // Set the imt table to be all conflicts by default.
3556 klass->SetImTable(Runtime::Current()->GetDefaultImt());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003557 size_t super_ifcount;
3558 if (klass->HasSuperClass()) {
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003559 super_ifcount = klass->GetSuperClass()->GetIfTableCount();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003560 } else {
3561 super_ifcount = 0;
3562 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07003563 size_t ifcount = super_ifcount;
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003564 uint32_t num_interfaces;
3565 {
3566 ClassHelper kh(klass.get());
3567 num_interfaces =
3568 interfaces.get() == nullptr ? kh.NumDirectInterfaces() : interfaces->GetLength();
3569 ifcount += num_interfaces;
3570 for (size_t i = 0; i < num_interfaces; i++) {
3571 mirror::Class* interface =
3572 interfaces.get() == nullptr ? kh.GetDirectInterface(i) : interfaces->Get(i);
3573 ifcount += interface->GetIfTableCount();
3574 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003575 }
Brian Carlstrom913af1b2011-07-23 21:41:13 -07003576 if (ifcount == 0) {
Ian Rogers9bc81912012-10-11 21:43:36 -07003577 // Class implements no interfaces.
3578 DCHECK_EQ(klass->GetIfTableCount(), 0);
3579 DCHECK(klass->GetIfTable() == NULL);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003580 return true;
3581 }
Ian Rogers9bc81912012-10-11 21:43:36 -07003582 if (ifcount == super_ifcount) {
3583 // Class implements same interfaces as parent, are any of these not marker interfaces?
3584 bool has_non_marker_interface = false;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003585 mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable();
Ian Rogers9bc81912012-10-11 21:43:36 -07003586 for (size_t i = 0; i < ifcount; ++i) {
3587 if (super_iftable->GetMethodArrayCount(i) > 0) {
3588 has_non_marker_interface = true;
3589 break;
3590 }
3591 }
3592 if (!has_non_marker_interface) {
3593 // Class just inherits marker interfaces from parent so recycle parent's iftable.
3594 klass->SetIfTable(super_iftable);
3595 return true;
3596 }
3597 }
Ian Rogers1f539342012-10-03 21:09:42 -07003598 Thread* self = Thread::Current();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003599 SirtRef<mirror::IfTable> iftable(self, AllocIfTable(self, ifcount));
Ian Rogersa436fde2013-08-27 23:34:06 -07003600 if (UNLIKELY(iftable.get() == NULL)) {
3601 CHECK(self->IsExceptionPending()); // OOME.
3602 return false;
3603 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003604 if (super_ifcount != 0) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003605 mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable();
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003606 for (size_t i = 0; i < super_ifcount; i++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003607 mirror::Class* super_interface = super_iftable->GetInterface(i);
Ian Rogers9bc81912012-10-11 21:43:36 -07003608 iftable->SetInterface(i, super_interface);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003609 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003610 }
3611 // Flatten the interface inheritance hierarchy.
3612 size_t idx = super_ifcount;
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003613 for (size_t i = 0; i < num_interfaces; i++) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003614 ClassHelper kh(klass.get());
Mathieu Chartier590fee92013-09-13 13:46:47 -07003615 mirror::Class* interface =
3616 interfaces.get() == nullptr ? kh.GetDirectInterface(i) : interfaces->Get(i);
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003617 DCHECK(interface != NULL);
3618 if (!interface->IsInterface()) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003619 ClassHelper ih(interface);
Ian Rogers62d6c772013-02-27 08:32:07 -08003620 ThrowIncompatibleClassChangeError(klass.get(), "Class %s implements non-interface class %s",
3621 PrettyDescriptor(klass.get()).c_str(),
3622 PrettyDescriptor(ih.GetDescriptor()).c_str());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003623 return false;
3624 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08003625 // Check if interface is already in iftable
3626 bool duplicate = false;
3627 for (size_t j = 0; j < idx; j++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003628 mirror::Class* existing_interface = iftable->GetInterface(j);
Ian Rogersb52b01a2012-01-12 17:01:38 -08003629 if (existing_interface == interface) {
3630 duplicate = true;
3631 break;
3632 }
3633 }
3634 if (!duplicate) {
3635 // Add this non-duplicate interface.
Ian Rogers9bc81912012-10-11 21:43:36 -07003636 iftable->SetInterface(idx++, interface);
Ian Rogersb52b01a2012-01-12 17:01:38 -08003637 // Add this interface's non-duplicate super-interfaces.
3638 for (int32_t j = 0; j < interface->GetIfTableCount(); j++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003639 mirror::Class* super_interface = interface->GetIfTable()->GetInterface(j);
Ian Rogersb52b01a2012-01-12 17:01:38 -08003640 bool super_duplicate = false;
3641 for (size_t k = 0; k < idx; k++) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003642 mirror::Class* existing_interface = iftable->GetInterface(k);
Ian Rogersb52b01a2012-01-12 17:01:38 -08003643 if (existing_interface == super_interface) {
3644 super_duplicate = true;
3645 break;
3646 }
3647 }
3648 if (!super_duplicate) {
Ian Rogers9bc81912012-10-11 21:43:36 -07003649 iftable->SetInterface(idx++, super_interface);
Ian Rogersb52b01a2012-01-12 17:01:38 -08003650 }
3651 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003652 }
3653 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08003654 // Shrink iftable in case duplicates were found
3655 if (idx < ifcount) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003656 iftable.reset(down_cast<mirror::IfTable*>(iftable->CopyOf(self, idx * mirror::IfTable::kMax)));
Ian Rogersa436fde2013-08-27 23:34:06 -07003657 if (UNLIKELY(iftable.get() == NULL)) {
3658 CHECK(self->IsExceptionPending()); // OOME.
3659 return false;
3660 }
Ian Rogersb52b01a2012-01-12 17:01:38 -08003661 ifcount = idx;
3662 } else {
3663 CHECK_EQ(idx, ifcount);
3664 }
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003665 klass->SetIfTable(iftable.get());
Elliott Hughes4681c802011-09-25 18:04:37 -07003666
3667 // If we're an interface, we don't need the vtable pointers, so we're done.
Ian Rogers9bc81912012-10-11 21:43:36 -07003668 if (klass->IsInterface()) {
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003669 return true;
3670 }
Jeff Hao88474b42013-10-23 16:24:40 -07003671 // Allocate imtable
3672 bool imtable_changed = false;
3673 SirtRef<mirror::ObjectArray<mirror::ArtMethod> > imtable(self, AllocArtMethodArray(self, kImtSize));
3674 if (UNLIKELY(imtable.get() == NULL)) {
3675 CHECK(self->IsExceptionPending()); // OOME.
3676 return false;
3677 }
Brian Carlstromea46f952013-07-30 01:26:50 -07003678 std::vector<mirror::ArtMethod*> miranda_list;
Brian Carlstrom4b620ff2011-09-11 01:11:01 -07003679 for (size_t i = 0; i < ifcount; ++i) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003680 size_t num_methods = iftable->GetInterface(i)->NumVirtualMethods();
Ian Rogers9bc81912012-10-11 21:43:36 -07003681 if (num_methods > 0) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003682 SirtRef<mirror::ObjectArray<mirror::ArtMethod> >
3683 method_array(self, AllocArtMethodArray(self, num_methods));
3684 if (UNLIKELY(method_array.get() == nullptr)) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003685 CHECK(self->IsExceptionPending()); // OOME.
3686 return false;
3687 }
Mathieu Chartier590fee92013-09-13 13:46:47 -07003688 iftable->SetMethodArray(i, method_array.get());
3689 SirtRef<mirror::ObjectArray<mirror::ArtMethod> > vtable(self,
3690 klass->GetVTableDuringLinking());
Ian Rogers62d6c772013-02-27 08:32:07 -08003691 for (size_t j = 0; j < num_methods; ++j) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003692 mirror::ArtMethod* interface_method = iftable->GetInterface(i)->GetVirtualMethod(j);
3693 MethodHelper interface_mh(interface_method);
Ian Rogers9bc81912012-10-11 21:43:36 -07003694 int32_t k;
3695 // For each method listed in the interface's method list, find the
3696 // matching method in our class's method list. We want to favor the
3697 // subclass over the superclass, which just requires walking
3698 // back from the end of the vtable. (This only matters if the
3699 // superclass defines a private method and this class redefines
3700 // it -- otherwise it would use the same vtable slot. In .dex files
3701 // those don't end up in the virtual method table, so it shouldn't
3702 // matter which direction we go. We walk it backward anyway.)
3703 for (k = vtable->GetLength() - 1; k >= 0; --k) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003704 mirror::ArtMethod* vtable_method = vtable->Get(k);
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003705 MethodHelper vtable_mh(vtable_method);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003706 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
Elliott Hughes68243612013-02-22 17:16:07 -08003707 if (!vtable_method->IsAbstract() && !vtable_method->IsPublic()) {
Ian Rogers62d6c772013-02-27 08:32:07 -08003708 ThrowIllegalAccessError(klass.get(),
3709 "Method '%s' implementing interface method '%s' is not public",
3710 PrettyMethod(vtable_method).c_str(),
3711 PrettyMethod(interface_method).c_str());
Ian Rogers9bc81912012-10-11 21:43:36 -07003712 return false;
3713 }
3714 method_array->Set(j, vtable_method);
Jeff Hao88474b42013-10-23 16:24:40 -07003715 // Place method in imt if entry is empty, place conflict otherwise.
3716 uint32_t imt_index = interface_method->GetDexMethodIndex() % kImtSize;
3717 if (imtable->Get(imt_index) == NULL) {
3718 imtable->Set(imt_index, vtable_method);
3719 imtable_changed = true;
3720 } else {
3721 imtable->Set(imt_index, Runtime::Current()->GetImtConflictMethod());
3722 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003723 break;
3724 }
3725 }
Ian Rogers9bc81912012-10-11 21:43:36 -07003726 if (k < 0) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003727 SirtRef<mirror::ArtMethod> miranda_method(self, NULL);
Ian Rogers9bc81912012-10-11 21:43:36 -07003728 for (size_t mir = 0; mir < miranda_list.size(); mir++) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003729 mirror::ArtMethod* mir_method = miranda_list[mir];
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003730 MethodHelper vtable_mh(mir_method);
Ian Rogers9bc81912012-10-11 21:43:36 -07003731 if (interface_mh.HasSameNameAndSignature(&vtable_mh)) {
3732 miranda_method.reset(miranda_list[mir]);
3733 break;
3734 }
3735 }
3736 if (miranda_method.get() == NULL) {
Ian Rogersa436fde2013-08-27 23:34:06 -07003737 // Point the interface table at a phantom slot.
Brian Carlstromea46f952013-07-30 01:26:50 -07003738 miranda_method.reset(down_cast<mirror::ArtMethod*>(interface_method->Clone(self)));
Ian Rogersa436fde2013-08-27 23:34:06 -07003739 if (UNLIKELY(miranda_method.get() == NULL)) {
3740 CHECK(self->IsExceptionPending()); // OOME.
3741 return false;
3742 }
Ian Rogersa436fde2013-08-27 23:34:06 -07003743 // TODO: If a methods move then the miranda_list may hold stale references.
Ian Rogers9bc81912012-10-11 21:43:36 -07003744 miranda_list.push_back(miranda_method.get());
3745 }
3746 method_array->Set(j, miranda_method.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003747 }
3748 }
3749 }
3750 }
Jeff Hao88474b42013-10-23 16:24:40 -07003751 if (imtable_changed) {
3752 // Fill in empty entries in interface method table with conflict.
3753 mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
3754 for (size_t i = 0; i < kImtSize; i++) {
3755 if (imtable->Get(i) == NULL) {
3756 imtable->Set(i, imt_conflict_method);
3757 }
3758 }
3759 klass->SetImTable(imtable.get());
3760 }
Elliott Hughes4681c802011-09-25 18:04:37 -07003761 if (!miranda_list.empty()) {
Brian Carlstrom913af1b2011-07-23 21:41:13 -07003762 int old_method_count = klass->NumVirtualMethods();
Elliott Hughes4681c802011-09-25 18:04:37 -07003763 int new_method_count = old_method_count + miranda_list.size();
Ian Rogersa436fde2013-08-27 23:34:06 -07003764 mirror::ObjectArray<mirror::ArtMethod>* virtuals;
3765 if (old_method_count == 0) {
3766 virtuals = AllocArtMethodArray(self, new_method_count);
3767 } else {
3768 virtuals = klass->GetVirtualMethods()->CopyOf(self, new_method_count);
3769 }
3770 if (UNLIKELY(virtuals == NULL)) {
3771 CHECK(self->IsExceptionPending()); // OOME.
3772 return false;
3773 }
3774 klass->SetVirtualMethods(virtuals);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003775
Brian Carlstromea46f952013-07-30 01:26:50 -07003776 SirtRef<mirror::ObjectArray<mirror::ArtMethod> >
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003777 vtable(self, klass->GetVTableDuringLinking());
Ian Rogers30fab402012-01-23 15:43:46 -08003778 CHECK(vtable.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003779 int old_vtable_count = vtable->GetLength();
Elliott Hughes4681c802011-09-25 18:04:37 -07003780 int new_vtable_count = old_vtable_count + miranda_list.size();
Ian Rogers50b35e22012-10-04 10:09:15 -07003781 vtable.reset(vtable->CopyOf(self, new_vtable_count));
Ian Rogersa436fde2013-08-27 23:34:06 -07003782 if (UNLIKELY(vtable.get() == NULL)) {
3783 CHECK(self->IsExceptionPending()); // OOME.
3784 return false;
3785 }
Elliott Hughes4681c802011-09-25 18:04:37 -07003786 for (size_t i = 0; i < miranda_list.size(); ++i) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003787 mirror::ArtMethod* method = miranda_list[i];
Ian Rogers9074b992011-10-26 17:41:55 -07003788 // Leave the declaring class alone as type indices are relative to it
Brian Carlstrom92827a52011-10-10 15:50:01 -07003789 method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda);
3790 method->SetMethodIndex(0xFFFF & (old_vtable_count + i));
3791 klass->SetVirtualMethod(old_method_count + i, method);
3792 vtable->Set(old_vtable_count + i, method);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003793 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003794 // TODO: do not assign to the vtable field until it is fully constructed.
Ian Rogers30fab402012-01-23 15:43:46 -08003795 klass->SetVTable(vtable.get());
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003796 }
Elliott Hughes4681c802011-09-25 18:04:37 -07003797
Brian Carlstromea46f952013-07-30 01:26:50 -07003798 mirror::ObjectArray<mirror::ArtMethod>* vtable = klass->GetVTableDuringLinking();
Elliott Hughes4681c802011-09-25 18:04:37 -07003799 for (int i = 0; i < vtable->GetLength(); ++i) {
3800 CHECK(vtable->Get(i) != NULL);
3801 }
3802
3803// klass->DumpClass(std::cerr, Class::kDumpClassFullDetail);
3804
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003805 return true;
3806}
3807
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003808bool ClassLinker::LinkInstanceFields(const SirtRef<mirror::Class>& klass) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003809 CHECK(klass.get() != NULL);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003810 return LinkFields(klass, false);
Brian Carlstrom4873d462011-08-21 15:23:39 -07003811}
3812
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003813bool ClassLinker::LinkStaticFields(const SirtRef<mirror::Class>& klass) {
Brian Carlstrom40381fb2011-10-19 14:13:40 -07003814 CHECK(klass.get() != NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003815 size_t allocated_class_size = klass->GetClassSize();
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003816 bool success = LinkFields(klass, true);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003817 CHECK_EQ(allocated_class_size, klass->GetClassSize());
Brian Carlstrom4873d462011-08-21 15:23:39 -07003818 return success;
3819}
3820
Brian Carlstromdbc05252011-09-09 01:59:59 -07003821struct LinkFieldsComparator {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003822 explicit LinkFieldsComparator() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
3823 }
Ian Rogers00f7d0e2012-07-19 15:28:27 -07003824 // No thread safety analysis as will be called from STL. Checked lock held in constructor.
Brian Carlstromea46f952013-07-30 01:26:50 -07003825 bool operator()(const mirror::ArtField* field1, const mirror::ArtField* field2)
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003826 NO_THREAD_SAFETY_ANALYSIS {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003827 // First come reference fields, then 64-bit, and finally 32-bit
Mathieu Chartier590fee92013-09-13 13:46:47 -07003828 FieldHelper fh1(field1);
3829 Primitive::Type type1 = fh1.GetTypeAsPrimitiveType();
3830 FieldHelper fh2(field2);
3831 Primitive::Type type2 = fh2.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003832 bool isPrimitive1 = type1 != Primitive::kPrimNot;
3833 bool isPrimitive2 = type2 != Primitive::kPrimNot;
3834 bool is64bit1 = isPrimitive1 && (type1 == Primitive::kPrimLong || type1 == Primitive::kPrimDouble);
3835 bool is64bit2 = isPrimitive2 && (type2 == Primitive::kPrimLong || type2 == Primitive::kPrimDouble);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003836 int order1 = (!isPrimitive1 ? 0 : (is64bit1 ? 1 : 2));
3837 int order2 = (!isPrimitive2 ? 0 : (is64bit2 ? 1 : 2));
3838 if (order1 != order2) {
3839 return order1 < order2;
3840 }
3841
3842 // same basic group? then sort by string.
Mathieu Chartier590fee92013-09-13 13:46:47 -07003843 const char* name1 = fh1.GetName();
3844 const char* name2 = fh2.GetName();
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003845 return strcmp(name1, name2) < 0;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003846 }
3847};
3848
Mathieu Chartierc528dba2013-11-26 12:00:11 -08003849bool ClassLinker::LinkFields(const SirtRef<mirror::Class>& klass, bool is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003850 size_t num_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003851 is_static ? klass->NumStaticFields() : klass->NumInstanceFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003852
Brian Carlstromea46f952013-07-30 01:26:50 -07003853 mirror::ObjectArray<mirror::ArtField>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003854 is_static ? klass->GetSFields() : klass->GetIFields();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003855
3856 // Initialize size and field_offset
Brian Carlstrom693267a2011-09-06 09:25:34 -07003857 size_t size;
3858 MemberOffset field_offset(0);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003859 if (is_static) {
3860 size = klass->GetClassSize();
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003861 field_offset = mirror::Class::FieldsOffset();
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003862 } else {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08003863 mirror::Class* super_class = klass->GetSuperClass();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003864 if (super_class != NULL) {
Elliott Hughes5fe594f2011-09-08 12:33:17 -07003865 CHECK(super_class->IsResolved());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003866 field_offset = MemberOffset(super_class->GetObjectSize());
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003867 }
3868 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003869 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003870
Brian Carlstromdbc05252011-09-09 01:59:59 -07003871 CHECK_EQ(num_fields == 0, fields == NULL);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003872
Brian Carlstromdbc05252011-09-09 01:59:59 -07003873 // we want a relatively stable order so that adding new fields
Elliott Hughesadb460d2011-10-05 17:02:34 -07003874 // minimizes disruption of C++ version such as Class and Method.
Brian Carlstromea46f952013-07-30 01:26:50 -07003875 std::deque<mirror::ArtField*> grouped_and_sorted_fields;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003876 for (size_t i = 0; i < num_fields; i++) {
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003877 mirror::ArtField* f = fields->Get(i);
3878 CHECK(f != NULL);
3879 grouped_and_sorted_fields.push_back(f);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003880 }
Mathieu Chartier590fee92013-09-13 13:46:47 -07003881 std::sort(grouped_and_sorted_fields.begin(), grouped_and_sorted_fields.end(),
3882 LinkFieldsComparator());
Brian Carlstromdbc05252011-09-09 01:59:59 -07003883
3884 // References should be at the front.
3885 size_t current_field = 0;
3886 size_t num_reference_fields = 0;
3887 for (; current_field < num_fields; current_field++) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003888 mirror::ArtField* field = grouped_and_sorted_fields.front();
Mathieu Chartier590fee92013-09-13 13:46:47 -07003889 FieldHelper fh(field);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003890 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003891 bool isPrimitive = type != Primitive::kPrimNot;
Brian Carlstromdbc05252011-09-09 01:59:59 -07003892 if (isPrimitive) {
Brian Carlstrom7934ac22013-07-26 10:54:15 -07003893 break; // past last reference, move on to the next phase
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003894 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07003895 grouped_and_sorted_fields.pop_front();
3896 num_reference_fields++;
3897 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003898 field->SetOffset(field_offset);
3899 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003900 }
3901
3902 // Now we want to pack all of the double-wide fields together. If
3903 // we're not aligned, though, we want to shuffle one 32-bit field
3904 // into place. If we can't find one, we'll have to pad it.
Elliott Hughes06b37d92011-10-16 11:51:29 -07003905 if (current_field != num_fields && !IsAligned<8>(field_offset.Uint32Value())) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003906 for (size_t i = 0; i < grouped_and_sorted_fields.size(); i++) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003907 mirror::ArtField* field = grouped_and_sorted_fields[i];
Mathieu Chartier590fee92013-09-13 13:46:47 -07003908 FieldHelper fh(field);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003909 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003910 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
3911 if (type == Primitive::kPrimLong || type == Primitive::kPrimDouble) {
Brian Carlstromdbc05252011-09-09 01:59:59 -07003912 continue;
3913 }
3914 fields->Set(current_field++, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003915 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003916 // drop the consumed field
3917 grouped_and_sorted_fields.erase(grouped_and_sorted_fields.begin() + i);
3918 break;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003919 }
Brian Carlstromdbc05252011-09-09 01:59:59 -07003920 // whether we found a 32-bit field for padding or not, we advance
3921 field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t));
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003922 }
3923
3924 // Alignment is good, shuffle any double-wide fields forward, and
3925 // finish assigning field offsets to all fields.
Elliott Hughes06b37d92011-10-16 11:51:29 -07003926 DCHECK(current_field == num_fields || IsAligned<8>(field_offset.Uint32Value()));
Brian Carlstromdbc05252011-09-09 01:59:59 -07003927 while (!grouped_and_sorted_fields.empty()) {
Brian Carlstromea46f952013-07-30 01:26:50 -07003928 mirror::ArtField* field = grouped_and_sorted_fields.front();
Brian Carlstromdbc05252011-09-09 01:59:59 -07003929 grouped_and_sorted_fields.pop_front();
Mathieu Chartier590fee92013-09-13 13:46:47 -07003930 FieldHelper fh(field);
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08003931 Primitive::Type type = fh.GetTypeAsPrimitiveType();
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003932 CHECK(type != Primitive::kPrimNot); // should only be working on primitive types
Brian Carlstromdbc05252011-09-09 01:59:59 -07003933 fields->Set(current_field, field);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003934 field->SetOffset(field_offset);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003935 field_offset = MemberOffset(field_offset.Uint32Value() +
Brian Carlstrom6b4ef022011-10-23 14:59:04 -07003936 ((type == Primitive::kPrimLong || type == Primitive::kPrimDouble)
Brian Carlstromdbc05252011-09-09 01:59:59 -07003937 ? sizeof(uint64_t)
3938 : sizeof(uint32_t)));
3939 current_field++;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003940 }
3941
Elliott Hughesadb460d2011-10-05 17:02:34 -07003942 // We lie to the GC about the java.lang.ref.Reference.referent field, so it doesn't scan it.
Ian Rogers64b6d142012-10-29 16:34:15 -07003943 if (!is_static &&
Mathieu Chartier590fee92013-09-13 13:46:47 -07003944 (strcmp("Ljava/lang/ref/Reference;", ClassHelper(klass.get()).GetDescriptor()) == 0)) {
Elliott Hughesadb460d2011-10-05 17:02:34 -07003945 // We know there are no non-reference fields in the Reference classes, and we know
3946 // that 'referent' is alphabetically last, so this is easy...
3947 CHECK_EQ(num_reference_fields, num_fields);
Mathieu Chartier590fee92013-09-13 13:46:47 -07003948 FieldHelper fh(fields->Get(num_fields - 1));
Elliott Hughesba8eee12012-01-24 20:25:24 -08003949 CHECK_STREQ(fh.GetName(), "referent");
Elliott Hughesadb460d2011-10-05 17:02:34 -07003950 --num_reference_fields;
3951 }
3952
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003953 if (kIsDebugBuild) {
3954 // Make sure that all reference fields appear before
3955 // non-reference fields, and all double-wide fields are aligned.
3956 bool seen_non_ref = false;
3957 for (size_t i = 0; i < num_fields; i++) {
3958 mirror::ArtField* field = fields->Get(i);
3959 if (false) { // enable to debug field layout
3960 LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance")
3961 << " class=" << PrettyClass(klass.get())
3962 << " field=" << PrettyField(field)
3963 << " offset=" << field->GetField32(MemberOffset(mirror::ArtField::OffsetOffset()),
3964 false);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003965 }
Mathieu Chartier590fee92013-09-13 13:46:47 -07003966 FieldHelper fh(field);
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003967 Primitive::Type type = fh.GetTypeAsPrimitiveType();
3968 bool is_primitive = type != Primitive::kPrimNot;
Mathieu Chartier590fee92013-09-13 13:46:47 -07003969 if ((strcmp("Ljava/lang/ref/Reference;", ClassHelper(klass.get()).GetDescriptor()) == 0)
Ian Rogersdfb325e2013-10-30 01:00:44 -07003970 && (strcmp("referent", fh.GetName()) == 0)) {
Ian Rogersfc0e94b2013-09-23 23:51:32 -07003971 is_primitive = true; // We lied above, so we have to expect a lie here.
3972 }
3973 if (is_primitive) {
3974 if (!seen_non_ref) {
3975 seen_non_ref = true;
3976 DCHECK_EQ(num_reference_fields, i);
3977 }
3978 } else {
3979 DCHECK(!seen_non_ref);
3980 }
3981 }
3982 if (!seen_non_ref) {
3983 DCHECK_EQ(num_fields, num_reference_fields);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07003984 }
3985 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003986 size = field_offset.Uint32Value();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003987 // Update klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07003988 if (is_static) {
3989 klass->SetNumReferenceStaticFields(num_reference_fields);
3990 klass->SetClassSize(size);
3991 } else {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07003992 klass->SetNumReferenceInstanceFields(num_reference_fields);
Brian Carlstromdbc05252011-09-09 01:59:59 -07003993 if (!klass->IsVariableSize()) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07003994 DCHECK_GE(size, sizeof(mirror::Object)) << ClassHelper(klass.get()).GetDescriptor();
Mathieu Chartier79b4f382013-10-23 15:21:37 -07003995 size_t previous_size = klass->GetObjectSize();
3996 if (previous_size != 0) {
3997 // Make sure that we didn't originally have an incorrect size.
3998 CHECK_EQ(previous_size, size);
3999 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004000 klass->SetObjectSize(size);
4001 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004002 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004003 return true;
4004}
4005
4006// Set the bitmap of reference offsets, refOffsets, from the ifields
4007// list.
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004008void ClassLinker::CreateReferenceInstanceOffsets(const SirtRef<mirror::Class>& klass) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004009 uint32_t reference_offsets = 0;
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004010 mirror::Class* super_class = klass->GetSuperClass();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004011 if (super_class != NULL) {
4012 reference_offsets = super_class->GetReferenceInstanceOffsets();
Brian Carlstrom4873d462011-08-21 15:23:39 -07004013 // If our superclass overflowed, we don't stand a chance.
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004014 if (reference_offsets == CLASS_WALK_SUPER) {
4015 klass->SetReferenceInstanceOffsets(reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07004016 return;
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004017 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004018 }
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004019 CreateReferenceOffsets(klass, false, reference_offsets);
Brian Carlstrom4873d462011-08-21 15:23:39 -07004020}
4021
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004022void ClassLinker::CreateReferenceStaticOffsets(const SirtRef<mirror::Class>& klass) {
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004023 CreateReferenceOffsets(klass, true, 0);
Brian Carlstrom4873d462011-08-21 15:23:39 -07004024}
4025
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004026void ClassLinker::CreateReferenceOffsets(const SirtRef<mirror::Class>& klass, bool is_static,
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004027 uint32_t reference_offsets) {
4028 size_t num_reference_fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004029 is_static ? klass->NumReferenceStaticFieldsDuringLinking()
4030 : klass->NumReferenceInstanceFieldsDuringLinking();
Brian Carlstromea46f952013-07-30 01:26:50 -07004031 const mirror::ObjectArray<mirror::ArtField>* fields =
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004032 is_static ? klass->GetSFields() : klass->GetIFields();
Brian Carlstrom4873d462011-08-21 15:23:39 -07004033 // All of the fields that contain object references are guaranteed
4034 // to be at the beginning of the fields list.
4035 for (size_t i = 0; i < num_reference_fields; ++i) {
4036 // Note that byte_offset is the offset from the beginning of
4037 // object, not the offset into instance data
Brian Carlstromea46f952013-07-30 01:26:50 -07004038 const mirror::ArtField* field = fields->Get(i);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004039 MemberOffset byte_offset = field->GetOffsetDuringLinking();
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004040 CHECK_EQ(byte_offset.Uint32Value() & (CLASS_OFFSET_ALIGNMENT - 1), 0U);
4041 if (CLASS_CAN_ENCODE_OFFSET(byte_offset.Uint32Value())) {
4042 uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset.Uint32Value());
Brian Carlstrom4873d462011-08-21 15:23:39 -07004043 CHECK_NE(new_bit, 0U);
4044 reference_offsets |= new_bit;
4045 } else {
4046 reference_offsets = CLASS_WALK_SUPER;
4047 break;
4048 }
4049 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004050 // Update fields in klass
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004051 if (is_static) {
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004052 klass->SetReferenceStaticOffsets(reference_offsets);
Brian Carlstrom3320cf42011-10-04 14:58:28 -07004053 } else {
4054 klass->SetReferenceInstanceOffsets(reference_offsets);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004055 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004056}
4057
Mathieu Chartier590fee92013-09-13 13:46:47 -07004058mirror::String* ClassLinker::ResolveString(const DexFile& dex_file, uint32_t string_idx,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004059 const SirtRef<mirror::DexCache>& dex_cache) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004060 DCHECK(dex_cache.get() != nullptr);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004061 mirror::String* resolved = dex_cache->GetResolvedString(string_idx);
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004062 if (resolved != NULL) {
4063 return resolved;
4064 }
Ian Rogersdfb325e2013-10-30 01:00:44 -07004065 uint32_t utf16_length;
4066 const char* utf8_data = dex_file.StringDataAndUtf16LengthByIdx(string_idx, &utf16_length);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004067 mirror::String* string = intern_table_->InternStrong(utf16_length, utf8_data);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004068 dex_cache->SetResolvedString(string_idx, string);
4069 return string;
4070}
4071
Mathieu Chartier590fee92013-09-13 13:46:47 -07004072mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx,
4073 const mirror::Class* referrer) {
4074 Thread* self = Thread::Current();
4075 SirtRef<mirror::DexCache> dex_cache(self, referrer->GetDexCache());
4076 SirtRef<mirror::ClassLoader> class_loader(self, referrer->GetClassLoader());
4077 return ResolveType(dex_file, type_idx, dex_cache, class_loader);
4078}
4079
4080mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004081 const SirtRef<mirror::DexCache>& dex_cache,
4082 const SirtRef<mirror::ClassLoader>& class_loader) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004083 DCHECK(dex_cache.get() != NULL);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004084 mirror::Class* resolved = dex_cache->GetResolvedType(type_idx);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004085 if (resolved == NULL) {
Ian Rogers0571d352011-11-03 19:51:38 -07004086 const char* descriptor = dex_file.StringByTypeIdx(type_idx);
Brian Carlstromaded5f72011-10-07 17:15:04 -07004087 resolved = FindClass(descriptor, class_loader);
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004088 if (resolved != NULL) {
Jesse Wilson254db0f2011-11-16 16:44:11 -05004089 // TODO: we used to throw here if resolved's class loader was not the
4090 // boot class loader. This was to permit different classes with the
4091 // same name to be loaded simultaneously by different loaders
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004092 dex_cache->SetResolvedType(type_idx, resolved);
4093 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -08004094 Thread* self = Thread::Current();
4095 CHECK(self->IsExceptionPending())
Ian Rogerscab01012012-01-10 17:35:46 -08004096 << "Expected pending exception for failed resolution of: " << descriptor;
Ian Rogers62d6c772013-02-27 08:32:07 -08004097 // Convert a ClassNotFoundException to a NoClassDefFoundError.
4098 SirtRef<mirror::Throwable> cause(self, self->GetException(NULL));
4099 if (cause->InstanceOf(GetClassRoot(kJavaLangClassNotFoundException))) {
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004100 SirtRef<mirror::Class> sirt_resolved(self, resolved);
jeffhao8cd6dda2012-02-22 10:15:34 -08004101 Thread::Current()->ClearException();
4102 ThrowNoClassDefFoundError("Failed resolution of: %s", descriptor);
Ian Rogers62d6c772013-02-27 08:32:07 -08004103 self->GetException(NULL)->SetCause(cause.get());
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004104 resolved = sirt_resolved.get();
jeffhao8cd6dda2012-02-22 10:15:34 -08004105 }
Ian Rogers0cfe1fb2011-08-26 03:29:44 -07004106 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004107 }
Brian Carlstromabcf7ae2013-09-23 22:19:52 -07004108 DCHECK((resolved == NULL) || resolved->IsResolved() || resolved->IsErroneous())
4109 << PrettyDescriptor(resolved) << " " << resolved->GetStatus();
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004110 return resolved;
4111}
4112
Brian Carlstromea46f952013-07-30 01:26:50 -07004113mirror::ArtMethod* ClassLinker::ResolveMethod(const DexFile& dex_file,
Ian Rogersd91d6d62013-09-25 20:26:14 -07004114 uint32_t method_idx,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004115 const SirtRef<mirror::DexCache>& dex_cache,
4116 const SirtRef<mirror::ClassLoader>& class_loader,
Ian Rogersd91d6d62013-09-25 20:26:14 -07004117 const mirror::ArtMethod* referrer,
4118 InvokeType type) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004119 DCHECK(dex_cache.get() != NULL);
Ian Rogers08f753d2012-08-24 14:35:25 -07004120 // Check for hit in the dex cache.
Brian Carlstromea46f952013-07-30 01:26:50 -07004121 mirror::ArtMethod* resolved = dex_cache->GetResolvedMethod(method_idx);
Ian Rogers8d31bbd2013-10-13 10:44:14 -07004122 if (resolved != NULL && !resolved->IsRuntimeMethod()) {
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004123 return resolved;
4124 }
Ian Rogers08f753d2012-08-24 14:35:25 -07004125 // Fail, get the declaring class.
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004126 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004127 mirror::Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004128 if (klass == NULL) {
Elliott Hughescc5f9a92011-09-28 19:17:29 -07004129 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004130 return NULL;
4131 }
Ian Rogers08f753d2012-08-24 14:35:25 -07004132 // Scan using method_idx, this saves string compares but will only hit for matching dex
4133 // caches/files.
4134 switch (type) {
4135 case kDirect: // Fall-through.
4136 case kStatic:
Mathieu Chartier590fee92013-09-13 13:46:47 -07004137 resolved = klass->FindDirectMethod(dex_cache.get(), method_idx);
Ian Rogers08f753d2012-08-24 14:35:25 -07004138 break;
4139 case kInterface:
Mathieu Chartier590fee92013-09-13 13:46:47 -07004140 resolved = klass->FindInterfaceMethod(dex_cache.get(), method_idx);
Ian Rogers4c5b2652012-12-15 21:36:16 -08004141 DCHECK(resolved == NULL || resolved->GetDeclaringClass()->IsInterface());
Ian Rogers08f753d2012-08-24 14:35:25 -07004142 break;
4143 case kSuper: // Fall-through.
4144 case kVirtual:
Mathieu Chartier590fee92013-09-13 13:46:47 -07004145 resolved = klass->FindVirtualMethod(dex_cache.get(), method_idx);
Ian Rogers08f753d2012-08-24 14:35:25 -07004146 break;
4147 default:
4148 LOG(FATAL) << "Unreachable - invocation type: " << type;
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07004149 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08004150 if (resolved == NULL) {
Ian Rogers08f753d2012-08-24 14:35:25 -07004151 // Search by name, which works across dex files.
Ian Rogers7b0c5b42012-02-16 15:29:07 -08004152 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
Ian Rogersd91d6d62013-09-25 20:26:14 -07004153 const Signature signature = dex_file.GetMethodSignature(method_id);
Ian Rogers08f753d2012-08-24 14:35:25 -07004154 switch (type) {
4155 case kDirect: // Fall-through.
4156 case kStatic:
jeffhao8cd6dda2012-02-22 10:15:34 -08004157 resolved = klass->FindDirectMethod(name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07004158 break;
4159 case kInterface:
4160 resolved = klass->FindInterfaceMethod(name, signature);
Ian Rogers4c5b2652012-12-15 21:36:16 -08004161 DCHECK(resolved == NULL || resolved->GetDeclaringClass()->IsInterface());
Ian Rogers08f753d2012-08-24 14:35:25 -07004162 break;
4163 case kSuper: // Fall-through.
4164 case kVirtual:
4165 resolved = klass->FindVirtualMethod(name, signature);
4166 break;
Ian Rogers7b0c5b42012-02-16 15:29:07 -08004167 }
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004168 }
Ian Rogers08f753d2012-08-24 14:35:25 -07004169 if (resolved != NULL) {
4170 // We found a method, check for incompatible class changes.
Ian Rogers87e552d2012-08-31 15:54:48 -07004171 if (resolved->CheckIncompatibleClassChange(type)) {
4172 resolved = NULL;
Ian Rogers08f753d2012-08-24 14:35:25 -07004173 }
4174 }
4175 if (resolved != NULL) {
4176 // Be a good citizen and update the dex cache to speed subsequent calls.
4177 dex_cache->SetResolvedMethod(method_idx, resolved);
4178 return resolved;
4179 } else {
jeffhaoc0228b82012-08-29 18:15:05 -07004180 // We failed to find the method which means either an access error, an incompatible class
4181 // change, or no such method. First try to find the method among direct and virtual methods.
Ian Rogers08f753d2012-08-24 14:35:25 -07004182 const char* name = dex_file.StringDataByIdx(method_id.name_idx_);
Ian Rogersd91d6d62013-09-25 20:26:14 -07004183 const Signature signature = dex_file.GetMethodSignature(method_id);
Ian Rogers08f753d2012-08-24 14:35:25 -07004184 switch (type) {
4185 case kDirect:
4186 case kStatic:
4187 resolved = klass->FindVirtualMethod(name, signature);
jeffhaoc0228b82012-08-29 18:15:05 -07004188 break;
4189 case kInterface:
4190 case kVirtual:
4191 case kSuper:
4192 resolved = klass->FindDirectMethod(name, signature);
4193 break;
4194 }
4195
4196 // If we found something, check that it can be accessed by the referrer.
4197 if (resolved != NULL && referrer != NULL) {
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004198 mirror::Class* methods_class = resolved->GetDeclaringClass();
4199 mirror::Class* referring_class = referrer->GetDeclaringClass();
jeffhaoc0228b82012-08-29 18:15:05 -07004200 if (!referring_class->CanAccess(methods_class)) {
Ian Rogers87e552d2012-08-31 15:54:48 -07004201 ThrowIllegalAccessErrorClassForMethodDispatch(referring_class, methods_class,
4202 referrer, resolved, type);
jeffhaoc0228b82012-08-29 18:15:05 -07004203 return NULL;
4204 } else if (!referring_class->CanAccessMember(methods_class,
4205 resolved->GetAccessFlags())) {
Ian Rogers87e552d2012-08-31 15:54:48 -07004206 ThrowIllegalAccessErrorMethod(referring_class, resolved);
jeffhaoc0228b82012-08-29 18:15:05 -07004207 return NULL;
4208 }
4209 }
4210
4211 // Otherwise, throw an IncompatibleClassChangeError if we found something, and check interface
4212 // methods and throw if we find the method there. If we find nothing, throw a NoSuchMethodError.
4213 switch (type) {
4214 case kDirect:
4215 case kStatic:
Ian Rogers08f753d2012-08-24 14:35:25 -07004216 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004217 ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004218 } else {
4219 resolved = klass->FindInterfaceMethod(name, signature);
4220 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004221 ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004222 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -08004223 ThrowNoSuchMethodError(type, klass, name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07004224 }
4225 }
4226 break;
4227 case kInterface:
Ian Rogers08f753d2012-08-24 14:35:25 -07004228 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004229 ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004230 } else {
4231 resolved = klass->FindVirtualMethod(name, signature);
4232 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004233 ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004234 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -08004235 ThrowNoSuchMethodError(type, klass, name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07004236 }
4237 }
4238 break;
4239 case kSuper:
Ian Rogers62d6c772013-02-27 08:32:07 -08004240 ThrowNoSuchMethodError(type, klass, name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07004241 break;
4242 case kVirtual:
Ian Rogers08f753d2012-08-24 14:35:25 -07004243 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004244 ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004245 } else {
4246 resolved = klass->FindInterfaceMethod(name, signature);
4247 if (resolved != NULL) {
Ian Rogers2fc14272012-08-30 10:56:57 -07004248 ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer);
Ian Rogers08f753d2012-08-24 14:35:25 -07004249 } else {
Ian Rogers62d6c772013-02-27 08:32:07 -08004250 ThrowNoSuchMethodError(type, klass, name, signature);
Ian Rogers08f753d2012-08-24 14:35:25 -07004251 }
4252 }
4253 break;
4254 }
4255 DCHECK(Thread::Current()->IsExceptionPending());
4256 return NULL;
4257 }
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004258}
4259
Mathieu Chartier590fee92013-09-13 13:46:47 -07004260mirror::ArtField* ClassLinker::ResolveField(const DexFile& dex_file, uint32_t field_idx,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004261 const SirtRef<mirror::DexCache>& dex_cache,
4262 const SirtRef<mirror::ClassLoader>& class_loader,
Brian Carlstrome8104522013-10-15 21:56:36 -07004263 bool is_static) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004264 DCHECK(dex_cache.get() != nullptr);
Brian Carlstromea46f952013-07-30 01:26:50 -07004265 mirror::ArtField* resolved = dex_cache->GetResolvedField(field_idx);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004266 if (resolved != NULL) {
4267 return resolved;
4268 }
4269 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004270 mirror::Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004271 if (klass == NULL) {
Ian Rogers9f1ab122011-12-12 08:52:43 -08004272 DCHECK(Thread::Current()->IsExceptionPending());
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004273 return NULL;
4274 }
4275
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07004276 if (is_static) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004277 resolved = klass->FindStaticField(dex_cache.get(), field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07004278 } else {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004279 resolved = klass->FindInstanceField(dex_cache.get(), field_idx);
Brian Carlstrom20cfffa2011-08-26 02:31:27 -07004280 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08004281
4282 if (resolved == NULL) {
4283 const char* name = dex_file.GetFieldName(field_id);
4284 const char* type = dex_file.GetFieldTypeDescriptor(field_id);
4285 if (is_static) {
4286 resolved = klass->FindStaticField(name, type);
4287 } else {
4288 resolved = klass->FindInstanceField(name, type);
4289 }
4290 if (resolved == NULL) {
4291 ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass, type, name);
4292 return NULL;
4293 }
Ian Rogersb067ac22011-12-13 18:05:09 -08004294 }
Ian Rogers7b0c5b42012-02-16 15:29:07 -08004295 dex_cache->SetResolvedField(field_idx, resolved);
Ian Rogersb067ac22011-12-13 18:05:09 -08004296 return resolved;
4297}
4298
Brian Carlstromea46f952013-07-30 01:26:50 -07004299mirror::ArtField* ClassLinker::ResolveFieldJLS(const DexFile& dex_file,
Ian Rogersfc0e94b2013-09-23 23:51:32 -07004300 uint32_t field_idx,
Mathieu Chartierc528dba2013-11-26 12:00:11 -08004301 const SirtRef<mirror::DexCache>& dex_cache,
4302 const SirtRef<mirror::ClassLoader>& class_loader) {
Mathieu Chartier590fee92013-09-13 13:46:47 -07004303 DCHECK(dex_cache.get() != nullptr);
Brian Carlstromea46f952013-07-30 01:26:50 -07004304 mirror::ArtField* resolved = dex_cache->GetResolvedField(field_idx);
Ian Rogersb067ac22011-12-13 18:05:09 -08004305 if (resolved != NULL) {
4306 return resolved;
4307 }
4308 const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004309 mirror::Class* klass = ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader);
Ian Rogersb067ac22011-12-13 18:05:09 -08004310 if (klass == NULL) {
4311 DCHECK(Thread::Current()->IsExceptionPending());
4312 return NULL;
4313 }
4314
Ian Rogersdfb325e2013-10-30 01:00:44 -07004315 StringPiece name(dex_file.StringDataByIdx(field_id.name_idx_));
4316 StringPiece type(dex_file.StringDataByIdx(
Ian Rogersfc0e94b2013-09-23 23:51:32 -07004317 dex_file.GetTypeId(field_id.type_idx_).descriptor_idx_));
Ian Rogersb067ac22011-12-13 18:05:09 -08004318 resolved = klass->FindField(name, type);
4319 if (resolved != NULL) {
4320 dex_cache->SetResolvedField(field_idx, resolved);
4321 } else {
4322 ThrowNoSuchFieldError("", klass, type, name);
Brian Carlstrom9ea1cb12011-08-24 23:18:18 -07004323 }
4324 return resolved;
Carl Shapiro5fafe2b2011-07-09 15:34:41 -07004325}
4326
Brian Carlstromea46f952013-07-30 01:26:50 -07004327const char* ClassLinker::MethodShorty(uint32_t method_idx, mirror::ArtMethod* referrer,
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004328 uint32_t* length) {
4329 mirror::Class* declaring_class = referrer->GetDeclaringClass();
4330 mirror::DexCache* dex_cache = declaring_class->GetDexCache();
Ian Rogers4445a7e2012-10-05 17:19:13 -07004331 const DexFile& dex_file = *dex_cache->GetDexFile();
Ian Rogersad25ac52011-10-04 19:13:33 -07004332 const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
Ian Rogers19846512012-02-24 11:42:47 -08004333 return dex_file.GetMethodShorty(method_id, length);
Ian Rogersad25ac52011-10-04 19:13:33 -07004334}
4335
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004336void ClassLinker::DumpAllClasses(int flags) {
4337 if (dex_cache_image_class_lookup_required_) {
4338 MoveImageClassesToClassTable();
4339 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07004340 // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker
4341 // 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 -08004342 std::vector<mirror::Class*> all_classes;
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07004343 {
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07004344 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004345 for (const std::pair<size_t, mirror::Class*>& it : class_table_) {
Mathieu Chartier02e25112013-08-14 16:14:24 -07004346 all_classes.push_back(it.second);
Ian Rogers5d76c432011-10-31 21:42:49 -07004347 }
Elliott Hughes9d5ccec2011-09-19 13:19:50 -07004348 }
4349
4350 for (size_t i = 0; i < all_classes.size(); ++i) {
4351 all_classes[i]->DumpClass(std::cerr, flags);
4352 }
4353}
4354
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004355void ClassLinker::DumpForSigQuit(std::ostream& os) {
4356 if (dex_cache_image_class_lookup_required_) {
4357 MoveImageClassesToClassTable();
4358 }
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07004359 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004360 os << "Loaded classes: " << class_table_.size() << " allocated classes\n";
Elliott Hughescac6cc72011-11-03 20:31:21 -07004361}
4362
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004363size_t ClassLinker::NumLoadedClasses() {
4364 if (dex_cache_image_class_lookup_required_) {
4365 MoveImageClassesToClassTable();
4366 }
Ian Rogers1bf8d4d2013-05-30 00:18:49 -07004367 ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_);
Ian Rogers7dfb28c2013-08-22 08:18:36 -07004368 return class_table_.size();
Elliott Hughese27955c2011-08-26 15:21:24 -07004369}
4370
Brian Carlstrom47d237a2011-10-18 15:08:33 -07004371pid_t ClassLinker::GetClassesLockOwner() {
Ian Rogersb726dcb2012-09-05 08:57:23 -07004372 return Locks::classlinker_classes_lock_->GetExclusiveOwnerTid();
Brian Carlstrom47d237a2011-10-18 15:08:33 -07004373}
4374
4375pid_t ClassLinker::GetDexLockOwner() {
Ian Rogers00f7d0e2012-07-19 15:28:27 -07004376 return dex_lock_.GetExclusiveOwnerTid();
Brian Carlstrom24a3c2e2011-10-17 18:07:52 -07004377}
4378
Ian Rogers2dd0e2c2013-01-24 12:42:14 -08004379void ClassLinker::SetClassRoot(ClassRoot class_root, mirror::Class* klass) {
Ian Rogers6d4d9fc2011-11-30 16:24:48 -08004380 DCHECK(!init_done_);
4381
4382 DCHECK(klass != NULL);
4383 DCHECK(klass->GetClassLoader() == NULL);
4384
4385 DCHECK(class_roots_ != NULL);
4386 DCHECK(class_roots_->Get(class_root) == NULL);
4387 class_roots_->Set(class_root, klass);
4388}
4389
Carl Shapiro0e5d75d2011-07-06 18:28:37 -07004390} // namespace art