| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "class_linker.h" |
| |
| #include <deque> |
| #include <memory> |
| #include <queue> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/casts.h" |
| #include "base/logging.h" |
| #include "base/scoped_flock.h" |
| #include "base/stl_util.h" |
| #include "base/unix_file/fd_file.h" |
| #include "class_linker-inl.h" |
| #include "compiler_callbacks.h" |
| #include "debugger.h" |
| #include "dex_file-inl.h" |
| #include "gc_root-inl.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "gc/accounting/heap_bitmap.h" |
| #include "gc/heap.h" |
| #include "gc/space/image_space.h" |
| #include "handle_scope.h" |
| #include "intern_table.h" |
| #include "interpreter/interpreter.h" |
| #include "leb128.h" |
| #include "method_helper-inl.h" |
| #include "oat.h" |
| #include "oat_file.h" |
| #include "object_lock.h" |
| #include "mirror/art_field-inl.h" |
| #include "mirror/art_method-inl.h" |
| #include "mirror/class.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/dex_cache-inl.h" |
| #include "mirror/iftable-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/proxy.h" |
| #include "mirror/reference-inl.h" |
| #include "mirror/stack_trace_element.h" |
| #include "mirror/string-inl.h" |
| #include "os.h" |
| #include "runtime.h" |
| #include "entrypoints/entrypoint_utils.h" |
| #include "ScopedLocalRef.h" |
| #include "scoped_thread_state_change.h" |
| #include "handle_scope-inl.h" |
| #include "thread-inl.h" |
| #include "utils.h" |
| #include "verifier/method_verifier.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| static void ThrowNoClassDefFoundError(const char* fmt, ...) |
| __attribute__((__format__(__printf__, 1, 2))) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| static void ThrowNoClassDefFoundError(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| Thread* self = Thread::Current(); |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| self->ThrowNewExceptionV(throw_location, "Ljava/lang/NoClassDefFoundError;", fmt, args); |
| va_end(args); |
| } |
| |
| static void ThrowEarlierClassFailure(mirror::Class* c) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // The class failed to initialize on a previous attempt, so we want to throw |
| // a NoClassDefFoundError (v2 2.17.5). The exception to this rule is if we |
| // failed in verification, in which case v2 5.4.1 says we need to re-throw |
| // the previous error. |
| Runtime* runtime = Runtime::Current(); |
| bool is_compiler = runtime->IsCompiler(); |
| if (!is_compiler) { // Give info if this occurs at runtime. |
| LOG(INFO) << "Rejecting re-init on previously-failed class " << PrettyClass(c); |
| } |
| |
| CHECK(c->IsErroneous()) << PrettyClass(c) << " " << c->GetStatus(); |
| Thread* self = Thread::Current(); |
| if (is_compiler) { |
| // At compile time, accurate errors and NCDFE are disabled to speed compilation. |
| mirror::Throwable* pre_allocated = runtime->GetPreAllocatedNoClassDefFoundError(); |
| self->SetException(ThrowLocation(), pre_allocated); |
| } else { |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| if (c->GetVerifyErrorClass() != NULL) { |
| // TODO: change the verifier to store an _instance_, with a useful detail message? |
| std::string temp; |
| self->ThrowNewException(throw_location, c->GetVerifyErrorClass()->GetDescriptor(&temp), |
| PrettyDescriptor(c).c_str()); |
| } else { |
| self->ThrowNewException(throw_location, "Ljava/lang/NoClassDefFoundError;", |
| PrettyDescriptor(c).c_str()); |
| } |
| } |
| } |
| |
| static void WrapExceptionInInitializer() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| Thread* self = Thread::Current(); |
| JNIEnv* env = self->GetJniEnv(); |
| |
| ScopedLocalRef<jthrowable> cause(env, env->ExceptionOccurred()); |
| CHECK(cause.get() != nullptr); |
| |
| env->ExceptionClear(); |
| bool is_error = env->IsInstanceOf(cause.get(), WellKnownClasses::java_lang_Error); |
| env->Throw(cause.get()); |
| |
| // We only wrap non-Error exceptions; an Error can just be used as-is. |
| if (!is_error) { |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| self->ThrowNewWrappedException(throw_location, "Ljava/lang/ExceptionInInitializerError;", |
| nullptr); |
| } |
| } |
| |
| static size_t Hash(const char* s) { |
| // This is the java.lang.String hashcode for convenience, not interoperability. |
| size_t hash = 0; |
| for (; *s != '\0'; ++s) { |
| hash = hash * 31 + *s; |
| } |
| return hash; |
| } |
| |
| // Gap between two fields in object layout. |
| struct FieldGap { |
| uint32_t start_offset; // The offset from the start of the object. |
| uint32_t size; // The gap size of 1, 2, or 4 bytes. |
| }; |
| struct FieldGapsComparator { |
| explicit FieldGapsComparator() { |
| } |
| bool operator() (const FieldGap& lhs, const FieldGap& rhs) |
| NO_THREAD_SAFETY_ANALYSIS { |
| // Sort by gap size, largest first. |
| return lhs.size > rhs.size; |
| } |
| }; |
| typedef std::priority_queue<FieldGap, std::vector<FieldGap>, FieldGapsComparator> FieldGaps; |
| |
| // Adds largest aligned gaps to queue of gaps. |
| void AddFieldGap(uint32_t gap_start, uint32_t gap_end, FieldGaps* gaps) { |
| DCHECK(gaps != nullptr); |
| |
| uint32_t current_offset = gap_start; |
| while (current_offset != gap_end) { |
| size_t remaining = gap_end - current_offset; |
| if (remaining >= sizeof(uint32_t) && IsAligned<4>(current_offset)) { |
| gaps->push(FieldGap {current_offset, sizeof(uint32_t)}); |
| current_offset += sizeof(uint32_t); |
| } else if (remaining >= sizeof(uint16_t) && IsAligned<2>(current_offset)) { |
| gaps->push(FieldGap {current_offset, sizeof(uint16_t)}); |
| current_offset += sizeof(uint16_t); |
| } else { |
| gaps->push(FieldGap {current_offset, sizeof(uint8_t)}); |
| current_offset += sizeof(uint8_t); |
| } |
| DCHECK_LE(current_offset, gap_end) << "Overran gap"; |
| } |
| } |
| // Shuffle fields forward, making use of gaps whenever possible. |
| template<int n> |
| static void ShuffleForward(const size_t num_fields, size_t* current_field_idx, |
| MemberOffset* field_offset, |
| mirror::ObjectArray<mirror::ArtField>* fields, |
| std::deque<mirror::ArtField*>* grouped_and_sorted_fields, |
| FieldGaps* gaps) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK(current_field_idx != nullptr); |
| DCHECK(grouped_and_sorted_fields != nullptr); |
| DCHECK(fields != nullptr || (num_fields == 0 && grouped_and_sorted_fields->empty())); |
| DCHECK(gaps != nullptr); |
| DCHECK(field_offset != nullptr); |
| |
| DCHECK(IsPowerOfTwo(n)); |
| while (!grouped_and_sorted_fields->empty()) { |
| mirror::ArtField* field = grouped_and_sorted_fields->front(); |
| Primitive::Type type = field->GetTypeAsPrimitiveType(); |
| if (Primitive::ComponentSize(type) < n) { |
| break; |
| } |
| if (!IsAligned<n>(field_offset->Uint32Value())) { |
| MemberOffset old_offset = *field_offset; |
| *field_offset = MemberOffset(RoundUp(field_offset->Uint32Value(), n)); |
| AddFieldGap(old_offset.Uint32Value(), field_offset->Uint32Value(), gaps); |
| } |
| CHECK(type != Primitive::kPrimNot) << PrettyField(field); // should be primitive types |
| grouped_and_sorted_fields->pop_front(); |
| fields->Set<false>(*current_field_idx, field); |
| if (!gaps->empty() && gaps->top().size >= n) { |
| FieldGap gap = gaps->top(); |
| gaps->pop(); |
| DCHECK(IsAligned<n>(gap.start_offset)); |
| field->SetOffset(MemberOffset(gap.start_offset)); |
| if (gap.size > n) { |
| AddFieldGap(gap.start_offset + n, gap.start_offset + gap.size, gaps); |
| } |
| } else { |
| DCHECK(IsAligned<n>(field_offset->Uint32Value())); |
| field->SetOffset(*field_offset); |
| *field_offset = MemberOffset(field_offset->Uint32Value() + n); |
| } |
| ++(*current_field_idx); |
| } |
| } |
| |
| const char* ClassLinker::class_roots_descriptors_[] = { |
| "Ljava/lang/Class;", |
| "Ljava/lang/Object;", |
| "[Ljava/lang/Class;", |
| "[Ljava/lang/Object;", |
| "Ljava/lang/String;", |
| "Ljava/lang/DexCache;", |
| "Ljava/lang/ref/Reference;", |
| "Ljava/lang/reflect/ArtField;", |
| "Ljava/lang/reflect/ArtMethod;", |
| "Ljava/lang/reflect/Proxy;", |
| "[Ljava/lang/String;", |
| "[Ljava/lang/reflect/ArtField;", |
| "[Ljava/lang/reflect/ArtMethod;", |
| "Ljava/lang/ClassLoader;", |
| "Ljava/lang/Throwable;", |
| "Ljava/lang/ClassNotFoundException;", |
| "Ljava/lang/StackTraceElement;", |
| "Z", |
| "B", |
| "C", |
| "D", |
| "F", |
| "I", |
| "J", |
| "S", |
| "V", |
| "[Z", |
| "[B", |
| "[C", |
| "[D", |
| "[F", |
| "[I", |
| "[J", |
| "[S", |
| "[Ljava/lang/StackTraceElement;", |
| }; |
| |
| ClassLinker::ClassLinker(InternTable* intern_table) |
| // dex_lock_ is recursive as it may be used in stack dumping. |
| : dex_lock_("ClassLinker dex lock", kDefaultMutexLevel), |
| dex_cache_image_class_lookup_required_(false), |
| failed_dex_cache_class_lookups_(0), |
| class_roots_(nullptr), |
| array_iftable_(nullptr), |
| find_array_class_cache_next_victim_(0), |
| init_done_(false), |
| log_new_dex_caches_roots_(false), |
| log_new_class_table_roots_(false), |
| intern_table_(intern_table), |
| portable_resolution_trampoline_(nullptr), |
| quick_resolution_trampoline_(nullptr), |
| portable_imt_conflict_trampoline_(nullptr), |
| quick_imt_conflict_trampoline_(nullptr), |
| quick_generic_jni_trampoline_(nullptr), |
| quick_to_interpreter_bridge_trampoline_(nullptr) { |
| CHECK_EQ(arraysize(class_roots_descriptors_), size_t(kClassRootsMax)); |
| memset(find_array_class_cache_, 0, kFindArrayCacheSize * sizeof(mirror::Class*)); |
| } |
| |
| // To set a value for generic JNI. May be necessary in compiler tests. |
| extern "C" void art_quick_generic_jni_trampoline(mirror::ArtMethod*); |
| extern "C" void art_quick_resolution_trampoline(mirror::ArtMethod*); |
| extern "C" void art_quick_imt_conflict_trampoline(mirror::ArtMethod*); |
| extern "C" void art_quick_to_interpreter_bridge(mirror::ArtMethod*); |
| |
| void ClassLinker::InitWithoutImage(const std::vector<const DexFile*>& boot_class_path) { |
| VLOG(startup) << "ClassLinker::Init"; |
| CHECK(!Runtime::Current()->GetHeap()->HasImageSpace()) << "Runtime has image. We should use it."; |
| |
| CHECK(!init_done_); |
| |
| // java_lang_Class comes first, it's needed for AllocClass |
| Thread* self = Thread::Current(); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // The GC can't handle an object with a null class since we can't get the size of this object. |
| heap->IncrementDisableMovingGC(self); |
| StackHandleScope<64> hs(self); // 64 is picked arbitrarily. |
| Handle<mirror::Class> java_lang_Class(hs.NewHandle(down_cast<mirror::Class*>( |
| heap->AllocNonMovableObject<true>(self, nullptr, |
| mirror::Class::ClassClassSize(), |
| VoidFunctor())))); |
| CHECK(java_lang_Class.Get() != nullptr); |
| mirror::Class::SetClassClass(java_lang_Class.Get()); |
| java_lang_Class->SetClass(java_lang_Class.Get()); |
| if (kUseBakerOrBrooksReadBarrier) { |
| java_lang_Class->AssertReadBarrierPointer(); |
| } |
| java_lang_Class->SetClassSize(mirror::Class::ClassClassSize()); |
| java_lang_Class->SetPrimitiveType(Primitive::kPrimNot); |
| heap->DecrementDisableMovingGC(self); |
| // AllocClass(mirror::Class*) can now be used |
| |
| // Class[] is used for reflection support. |
| Handle<mirror::Class> class_array_class(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::ObjectArray<mirror::Class>::ClassSize()))); |
| class_array_class->SetComponentType(java_lang_Class.Get()); |
| |
| // java_lang_Object comes next so that object_array_class can be created. |
| Handle<mirror::Class> java_lang_Object(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::Object::ClassSize()))); |
| CHECK(java_lang_Object.Get() != nullptr); |
| // backfill Object as the super class of Class. |
| java_lang_Class->SetSuperClass(java_lang_Object.Get()); |
| java_lang_Object->SetStatus(mirror::Class::kStatusLoaded, self); |
| |
| // Object[] next to hold class roots. |
| Handle<mirror::Class> object_array_class(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::ObjectArray<mirror::Object>::ClassSize()))); |
| object_array_class->SetComponentType(java_lang_Object.Get()); |
| |
| // Setup the char (primitive) class to be used for char[]. |
| Handle<mirror::Class> char_class(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::Class::PrimitiveClassSize()))); |
| // The primitive char class won't be initialized by |
| // InitializePrimitiveClass until line 459, but strings (and |
| // internal char arrays) will be allocated before that and the |
| // component size, which is computed from the primitive type, needs |
| // to be set here. |
| char_class->SetPrimitiveType(Primitive::kPrimChar); |
| |
| // Setup the char[] class to be used for String. |
| Handle<mirror::Class> char_array_class(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), |
| mirror::Array::ClassSize()))); |
| char_array_class->SetComponentType(char_class.Get()); |
| mirror::CharArray::SetArrayClass(char_array_class.Get()); |
| |
| // Setup String. |
| Handle<mirror::Class> java_lang_String(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::String::ClassSize()))); |
| mirror::String::SetClass(java_lang_String.Get()); |
| java_lang_String->SetObjectSize(mirror::String::InstanceSize()); |
| java_lang_String->SetStatus(mirror::Class::kStatusResolved, self); |
| |
| // Setup Reference. |
| Handle<mirror::Class> java_lang_ref_Reference(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::Reference::ClassSize()))); |
| mirror::Reference::SetClass(java_lang_ref_Reference.Get()); |
| java_lang_ref_Reference->SetObjectSize(mirror::Reference::InstanceSize()); |
| java_lang_ref_Reference->SetStatus(mirror::Class::kStatusResolved, self); |
| |
| // Create storage for root classes, save away our work so far (requires descriptors). |
| class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class> >( |
| mirror::ObjectArray<mirror::Class>::Alloc(self, object_array_class.Get(), |
| kClassRootsMax)); |
| CHECK(!class_roots_.IsNull()); |
| SetClassRoot(kJavaLangClass, java_lang_Class.Get()); |
| SetClassRoot(kJavaLangObject, java_lang_Object.Get()); |
| SetClassRoot(kClassArrayClass, class_array_class.Get()); |
| SetClassRoot(kObjectArrayClass, object_array_class.Get()); |
| SetClassRoot(kCharArrayClass, char_array_class.Get()); |
| SetClassRoot(kJavaLangString, java_lang_String.Get()); |
| SetClassRoot(kJavaLangRefReference, java_lang_ref_Reference.Get()); |
| |
| // Setup the primitive type classes. |
| SetClassRoot(kPrimitiveBoolean, CreatePrimitiveClass(self, Primitive::kPrimBoolean)); |
| SetClassRoot(kPrimitiveByte, CreatePrimitiveClass(self, Primitive::kPrimByte)); |
| SetClassRoot(kPrimitiveShort, CreatePrimitiveClass(self, Primitive::kPrimShort)); |
| SetClassRoot(kPrimitiveInt, CreatePrimitiveClass(self, Primitive::kPrimInt)); |
| SetClassRoot(kPrimitiveLong, CreatePrimitiveClass(self, Primitive::kPrimLong)); |
| SetClassRoot(kPrimitiveFloat, CreatePrimitiveClass(self, Primitive::kPrimFloat)); |
| SetClassRoot(kPrimitiveDouble, CreatePrimitiveClass(self, Primitive::kPrimDouble)); |
| SetClassRoot(kPrimitiveVoid, CreatePrimitiveClass(self, Primitive::kPrimVoid)); |
| |
| // Create array interface entries to populate once we can load system classes. |
| array_iftable_ = GcRoot<mirror::IfTable>(AllocIfTable(self, 2)); |
| |
| // Create int array type for AllocDexCache (done in AppendToBootClassPath). |
| Handle<mirror::Class> int_array_class(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::Array::ClassSize()))); |
| int_array_class->SetComponentType(GetClassRoot(kPrimitiveInt)); |
| mirror::IntArray::SetArrayClass(int_array_class.Get()); |
| SetClassRoot(kIntArrayClass, int_array_class.Get()); |
| |
| // now that these are registered, we can use AllocClass() and AllocObjectArray |
| |
| // Set up DexCache. This cannot be done later since AppendToBootClassPath calls AllocDexCache. |
| Handle<mirror::Class> java_lang_DexCache(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::DexCache::ClassSize()))); |
| SetClassRoot(kJavaLangDexCache, java_lang_DexCache.Get()); |
| java_lang_DexCache->SetObjectSize(mirror::DexCache::InstanceSize()); |
| java_lang_DexCache->SetStatus(mirror::Class::kStatusResolved, self); |
| |
| // Constructor, Field, Method, and AbstractMethod are necessary so |
| // that FindClass can link members. |
| Handle<mirror::Class> java_lang_reflect_ArtField(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::ArtField::ClassSize()))); |
| CHECK(java_lang_reflect_ArtField.Get() != nullptr); |
| java_lang_reflect_ArtField->SetObjectSize(mirror::ArtField::InstanceSize()); |
| SetClassRoot(kJavaLangReflectArtField, java_lang_reflect_ArtField.Get()); |
| java_lang_reflect_ArtField->SetStatus(mirror::Class::kStatusResolved, self); |
| mirror::ArtField::SetClass(java_lang_reflect_ArtField.Get()); |
| |
| Handle<mirror::Class> java_lang_reflect_ArtMethod(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), mirror::ArtMethod::ClassSize()))); |
| CHECK(java_lang_reflect_ArtMethod.Get() != nullptr); |
| java_lang_reflect_ArtMethod->SetObjectSize(mirror::ArtMethod::InstanceSize()); |
| SetClassRoot(kJavaLangReflectArtMethod, java_lang_reflect_ArtMethod.Get()); |
| java_lang_reflect_ArtMethod->SetStatus(mirror::Class::kStatusResolved, self); |
| |
| mirror::ArtMethod::SetClass(java_lang_reflect_ArtMethod.Get()); |
| |
| // Set up array classes for string, field, method |
| Handle<mirror::Class> object_array_string(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), |
| mirror::ObjectArray<mirror::String>::ClassSize()))); |
| object_array_string->SetComponentType(java_lang_String.Get()); |
| SetClassRoot(kJavaLangStringArrayClass, object_array_string.Get()); |
| |
| Handle<mirror::Class> object_array_art_method(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), |
| mirror::ObjectArray<mirror::ArtMethod>::ClassSize()))); |
| object_array_art_method->SetComponentType(java_lang_reflect_ArtMethod.Get()); |
| SetClassRoot(kJavaLangReflectArtMethodArrayClass, object_array_art_method.Get()); |
| |
| Handle<mirror::Class> object_array_art_field(hs.NewHandle( |
| AllocClass(self, java_lang_Class.Get(), |
| mirror::ObjectArray<mirror::ArtField>::ClassSize()))); |
| object_array_art_field->SetComponentType(java_lang_reflect_ArtField.Get()); |
| SetClassRoot(kJavaLangReflectArtFieldArrayClass, object_array_art_field.Get()); |
| |
| // Setup boot_class_path_ and register class_path now that we can use AllocObjectArray to create |
| // DexCache instances. Needs to be after String, Field, Method arrays since AllocDexCache uses |
| // these roots. |
| CHECK_NE(0U, boot_class_path.size()); |
| for (size_t i = 0; i != boot_class_path.size(); ++i) { |
| const DexFile* dex_file = boot_class_path[i]; |
| CHECK(dex_file != nullptr); |
| AppendToBootClassPath(self, *dex_file); |
| } |
| |
| // now we can use FindSystemClass |
| |
| // run char class through InitializePrimitiveClass to finish init |
| InitializePrimitiveClass(char_class.Get(), Primitive::kPrimChar); |
| SetClassRoot(kPrimitiveChar, char_class.Get()); // needs descriptor |
| |
| // Create runtime resolution and imt conflict methods. Also setup the default imt. |
| Runtime* runtime = Runtime::Current(); |
| runtime->SetResolutionMethod(runtime->CreateResolutionMethod()); |
| runtime->SetImtConflictMethod(runtime->CreateImtConflictMethod()); |
| runtime->SetDefaultImt(runtime->CreateDefaultImt(this)); |
| |
| // Set up GenericJNI entrypoint. That is mainly a hack for common_compiler_test.h so that |
| // we do not need friend classes or a publicly exposed setter. |
| quick_generic_jni_trampoline_ = reinterpret_cast<void*>(art_quick_generic_jni_trampoline); |
| if (!runtime->IsCompiler()) { |
| // We need to set up the generic trampolines since we don't have an image. |
| quick_resolution_trampoline_ = reinterpret_cast<void*>(art_quick_resolution_trampoline); |
| quick_imt_conflict_trampoline_ = reinterpret_cast<void*>(art_quick_imt_conflict_trampoline); |
| quick_to_interpreter_bridge_trampoline_ = reinterpret_cast<void*>(art_quick_to_interpreter_bridge); |
| } |
| |
| // Object, String and DexCache need to be rerun through FindSystemClass to finish init |
| java_lang_Object->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* Object_class = FindSystemClass(self, "Ljava/lang/Object;"); |
| CHECK_EQ(java_lang_Object.Get(), Object_class); |
| CHECK_EQ(java_lang_Object->GetObjectSize(), mirror::Object::InstanceSize()); |
| java_lang_String->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* String_class = FindSystemClass(self, "Ljava/lang/String;"); |
| std::ostringstream os1, os2; |
| java_lang_String->DumpClass(os1, mirror::Class::kDumpClassFullDetail); |
| String_class->DumpClass(os2, mirror::Class::kDumpClassFullDetail); |
| CHECK_EQ(java_lang_String.Get(), String_class) << os1.str() << "\n\n" << os2.str(); |
| CHECK_EQ(java_lang_String->GetObjectSize(), mirror::String::InstanceSize()); |
| java_lang_DexCache->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* DexCache_class = FindSystemClass(self, "Ljava/lang/DexCache;"); |
| CHECK_EQ(java_lang_String.Get(), String_class); |
| CHECK_EQ(java_lang_DexCache.Get(), DexCache_class); |
| CHECK_EQ(java_lang_DexCache->GetObjectSize(), mirror::DexCache::InstanceSize()); |
| |
| // Setup the primitive array type classes - can't be done until Object has a vtable. |
| SetClassRoot(kBooleanArrayClass, FindSystemClass(self, "[Z")); |
| mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass)); |
| |
| SetClassRoot(kByteArrayClass, FindSystemClass(self, "[B")); |
| mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass)); |
| |
| mirror::Class* found_char_array_class = FindSystemClass(self, "[C"); |
| CHECK_EQ(char_array_class.Get(), found_char_array_class); |
| |
| SetClassRoot(kShortArrayClass, FindSystemClass(self, "[S")); |
| mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass)); |
| |
| mirror::Class* found_int_array_class = FindSystemClass(self, "[I"); |
| CHECK_EQ(int_array_class.Get(), found_int_array_class); |
| |
| SetClassRoot(kLongArrayClass, FindSystemClass(self, "[J")); |
| mirror::LongArray::SetArrayClass(GetClassRoot(kLongArrayClass)); |
| |
| SetClassRoot(kFloatArrayClass, FindSystemClass(self, "[F")); |
| mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass)); |
| |
| SetClassRoot(kDoubleArrayClass, FindSystemClass(self, "[D")); |
| mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass)); |
| |
| mirror::Class* found_class_array_class = FindSystemClass(self, "[Ljava/lang/Class;"); |
| CHECK_EQ(class_array_class.Get(), found_class_array_class); |
| |
| mirror::Class* found_object_array_class = FindSystemClass(self, "[Ljava/lang/Object;"); |
| CHECK_EQ(object_array_class.Get(), found_object_array_class); |
| |
| // Setup the single, global copy of "iftable". |
| mirror::Class* java_lang_Cloneable = FindSystemClass(self, "Ljava/lang/Cloneable;"); |
| CHECK(java_lang_Cloneable != nullptr); |
| mirror::Class* java_io_Serializable = FindSystemClass(self, "Ljava/io/Serializable;"); |
| CHECK(java_io_Serializable != nullptr); |
| // We assume that Cloneable/Serializable don't have superinterfaces -- normally we'd have to |
| // crawl up and explicitly list all of the supers as well. |
| { |
| mirror::IfTable* array_iftable = array_iftable_.Read(); |
| array_iftable->SetInterface(0, java_lang_Cloneable); |
| array_iftable->SetInterface(1, java_io_Serializable); |
| } |
| |
| // Sanity check Class[] and Object[]'s interfaces. |
| CHECK_EQ(java_lang_Cloneable, mirror::Class::GetDirectInterface(self, class_array_class, 0)); |
| CHECK_EQ(java_io_Serializable, mirror::Class::GetDirectInterface(self, class_array_class, 1)); |
| CHECK_EQ(java_lang_Cloneable, mirror::Class::GetDirectInterface(self, object_array_class, 0)); |
| CHECK_EQ(java_io_Serializable, mirror::Class::GetDirectInterface(self, object_array_class, 1)); |
| // Run Class, ArtField, and ArtMethod through FindSystemClass. This initializes their |
| // dex_cache_ fields and register them in class_table_. |
| mirror::Class* Class_class = FindSystemClass(self, "Ljava/lang/Class;"); |
| CHECK_EQ(java_lang_Class.Get(), Class_class); |
| |
| java_lang_reflect_ArtMethod->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* Art_method_class = FindSystemClass(self, "Ljava/lang/reflect/ArtMethod;"); |
| CHECK_EQ(java_lang_reflect_ArtMethod.Get(), Art_method_class); |
| |
| java_lang_reflect_ArtField->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* Art_field_class = FindSystemClass(self, "Ljava/lang/reflect/ArtField;"); |
| CHECK_EQ(java_lang_reflect_ArtField.Get(), Art_field_class); |
| |
| mirror::Class* String_array_class = |
| FindSystemClass(self, class_roots_descriptors_[kJavaLangStringArrayClass]); |
| CHECK_EQ(object_array_string.Get(), String_array_class); |
| |
| mirror::Class* Art_method_array_class = |
| FindSystemClass(self, class_roots_descriptors_[kJavaLangReflectArtMethodArrayClass]); |
| CHECK_EQ(object_array_art_method.Get(), Art_method_array_class); |
| |
| mirror::Class* Art_field_array_class = |
| FindSystemClass(self, class_roots_descriptors_[kJavaLangReflectArtFieldArrayClass]); |
| CHECK_EQ(object_array_art_field.Get(), Art_field_array_class); |
| |
| // End of special init trickery, subsequent classes may be loaded via FindSystemClass. |
| |
| // Create java.lang.reflect.Proxy root. |
| mirror::Class* java_lang_reflect_Proxy = FindSystemClass(self, "Ljava/lang/reflect/Proxy;"); |
| SetClassRoot(kJavaLangReflectProxy, java_lang_reflect_Proxy); |
| |
| // java.lang.ref classes need to be specially flagged, but otherwise are normal classes |
| // finish initializing Reference class |
| java_lang_ref_Reference->SetStatus(mirror::Class::kStatusNotReady, self); |
| mirror::Class* Reference_class = FindSystemClass(self, "Ljava/lang/ref/Reference;"); |
| CHECK_EQ(java_lang_ref_Reference.Get(), Reference_class); |
| CHECK_EQ(java_lang_ref_Reference->GetObjectSize(), mirror::Reference::InstanceSize()); |
| CHECK_EQ(java_lang_ref_Reference->GetClassSize(), mirror::Reference::ClassSize()); |
| mirror::Class* java_lang_ref_FinalizerReference = |
| FindSystemClass(self, "Ljava/lang/ref/FinalizerReference;"); |
| java_lang_ref_FinalizerReference->SetAccessFlags( |
| java_lang_ref_FinalizerReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsFinalizerReference); |
| mirror::Class* java_lang_ref_PhantomReference = |
| FindSystemClass(self, "Ljava/lang/ref/PhantomReference;"); |
| java_lang_ref_PhantomReference->SetAccessFlags( |
| java_lang_ref_PhantomReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsPhantomReference); |
| mirror::Class* java_lang_ref_SoftReference = |
| FindSystemClass(self, "Ljava/lang/ref/SoftReference;"); |
| java_lang_ref_SoftReference->SetAccessFlags( |
| java_lang_ref_SoftReference->GetAccessFlags() | kAccClassIsReference); |
| mirror::Class* java_lang_ref_WeakReference = |
| FindSystemClass(self, "Ljava/lang/ref/WeakReference;"); |
| java_lang_ref_WeakReference->SetAccessFlags( |
| java_lang_ref_WeakReference->GetAccessFlags() | |
| kAccClassIsReference | kAccClassIsWeakReference); |
| |
| // Setup the ClassLoader, verifying the object_size_. |
| mirror::Class* java_lang_ClassLoader = FindSystemClass(self, "Ljava/lang/ClassLoader;"); |
| CHECK_EQ(java_lang_ClassLoader->GetObjectSize(), mirror::ClassLoader::InstanceSize()); |
| SetClassRoot(kJavaLangClassLoader, java_lang_ClassLoader); |
| |
| // Set up java.lang.Throwable, java.lang.ClassNotFoundException, and |
| // java.lang.StackTraceElement as a convenience. |
| SetClassRoot(kJavaLangThrowable, FindSystemClass(self, "Ljava/lang/Throwable;")); |
| mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable)); |
| SetClassRoot(kJavaLangClassNotFoundException, |
| FindSystemClass(self, "Ljava/lang/ClassNotFoundException;")); |
| SetClassRoot(kJavaLangStackTraceElement, FindSystemClass(self, "Ljava/lang/StackTraceElement;")); |
| SetClassRoot(kJavaLangStackTraceElementArrayClass, |
| FindSystemClass(self, "[Ljava/lang/StackTraceElement;")); |
| mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement)); |
| |
| FinishInit(self); |
| |
| VLOG(startup) << "ClassLinker::InitFromCompiler exiting"; |
| } |
| |
| void ClassLinker::FinishInit(Thread* self) { |
| VLOG(startup) << "ClassLinker::FinishInit entering"; |
| |
| // Let the heap know some key offsets into java.lang.ref instances |
| // Note: we hard code the field indexes here rather than using FindInstanceField |
| // as the types of the field can't be resolved prior to the runtime being |
| // fully initialized |
| mirror::Class* java_lang_ref_Reference = GetClassRoot(kJavaLangRefReference); |
| mirror::Class* java_lang_ref_FinalizerReference = |
| FindSystemClass(self, "Ljava/lang/ref/FinalizerReference;"); |
| |
| mirror::ArtField* pendingNext = java_lang_ref_Reference->GetInstanceField(0); |
| CHECK_STREQ(pendingNext->GetName(), "pendingNext"); |
| CHECK_STREQ(pendingNext->GetTypeDescriptor(), "Ljava/lang/ref/Reference;"); |
| |
| mirror::ArtField* queue = java_lang_ref_Reference->GetInstanceField(1); |
| CHECK_STREQ(queue->GetName(), "queue"); |
| CHECK_STREQ(queue->GetTypeDescriptor(), "Ljava/lang/ref/ReferenceQueue;"); |
| |
| mirror::ArtField* queueNext = java_lang_ref_Reference->GetInstanceField(2); |
| CHECK_STREQ(queueNext->GetName(), "queueNext"); |
| CHECK_STREQ(queueNext->GetTypeDescriptor(), "Ljava/lang/ref/Reference;"); |
| |
| mirror::ArtField* referent = java_lang_ref_Reference->GetInstanceField(3); |
| CHECK_STREQ(referent->GetName(), "referent"); |
| CHECK_STREQ(referent->GetTypeDescriptor(), "Ljava/lang/Object;"); |
| |
| mirror::ArtField* zombie = java_lang_ref_FinalizerReference->GetInstanceField(2); |
| CHECK_STREQ(zombie->GetName(), "zombie"); |
| CHECK_STREQ(zombie->GetTypeDescriptor(), "Ljava/lang/Object;"); |
| |
| // ensure all class_roots_ are initialized |
| for (size_t i = 0; i < kClassRootsMax; i++) { |
| ClassRoot class_root = static_cast<ClassRoot>(i); |
| mirror::Class* klass = GetClassRoot(class_root); |
| CHECK(klass != nullptr); |
| DCHECK(klass->IsArrayClass() || klass->IsPrimitive() || klass->GetDexCache() != nullptr); |
| // note SetClassRoot does additional validation. |
| // if possible add new checks there to catch errors early |
| } |
| |
| CHECK(!array_iftable_.IsNull()); |
| |
| // disable the slow paths in FindClass and CreatePrimitiveClass now |
| // that Object, Class, and Object[] are setup |
| init_done_ = true; |
| |
| VLOG(startup) << "ClassLinker::FinishInit exiting"; |
| } |
| |
| void ClassLinker::RunRootClinits() { |
| Thread* self = Thread::Current(); |
| for (size_t i = 0; i < ClassLinker::kClassRootsMax; ++i) { |
| mirror::Class* c = GetClassRoot(ClassRoot(i)); |
| if (!c->IsArrayClass() && !c->IsPrimitive()) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(GetClassRoot(ClassRoot(i)))); |
| EnsureInitialized(self, h_class, true, true); |
| self->AssertNoPendingException(); |
| } |
| } |
| } |
| |
| bool ClassLinker::GenerateOatFile(const char* dex_filename, |
| int oat_fd, |
| const char* oat_cache_filename, |
| std::string* error_msg) { |
| Locks::mutator_lock_->AssertNotHeld(Thread::Current()); // Avoid starving GC. |
| std::string dex2oat(Runtime::Current()->GetCompilerExecutable()); |
| |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| std::string boot_image_option("--boot-image="); |
| if (heap->GetImageSpace() == nullptr) { |
| // TODO If we get a dex2dex compiler working we could maybe use that, OTOH since we are likely |
| // out of space anyway it might not matter. |
| *error_msg = StringPrintf("Cannot create oat file for '%s' because we are running " |
| "without an image.", dex_filename); |
| return false; |
| } |
| boot_image_option += heap->GetImageSpace()->GetImageLocation(); |
| |
| std::string dex_file_option("--dex-file="); |
| dex_file_option += dex_filename; |
| |
| std::string oat_fd_option("--oat-fd="); |
| StringAppendF(&oat_fd_option, "%d", oat_fd); |
| |
| std::string oat_location_option("--oat-location="); |
| oat_location_option += oat_cache_filename; |
| |
| std::vector<std::string> argv; |
| argv.push_back(dex2oat); |
| argv.push_back("--runtime-arg"); |
| argv.push_back("-classpath"); |
| argv.push_back("--runtime-arg"); |
| argv.push_back(Runtime::Current()->GetClassPathString()); |
| |
| Runtime::Current()->AddCurrentRuntimeFeaturesAsDex2OatArguments(&argv); |
| |
| if (!Runtime::Current()->IsVerificationEnabled()) { |
| argv.push_back("--compiler-filter=verify-none"); |
| } |
| |
| if (Runtime::Current()->MustRelocateIfPossible()) { |
| argv.push_back("--runtime-arg"); |
| argv.push_back("-Xrelocate"); |
| } else { |
| argv.push_back("--runtime-arg"); |
| argv.push_back("-Xnorelocate"); |
| } |
| |
| if (!kIsTargetBuild) { |
| argv.push_back("--host"); |
| } |
| |
| argv.push_back(boot_image_option); |
| argv.push_back(dex_file_option); |
| argv.push_back(oat_fd_option); |
| argv.push_back(oat_location_option); |
| const std::vector<std::string>& compiler_options = Runtime::Current()->GetCompilerOptions(); |
| for (size_t i = 0; i < compiler_options.size(); ++i) { |
| argv.push_back(compiler_options[i].c_str()); |
| } |
| |
| return Exec(argv, error_msg); |
| } |
| |
| const OatFile* ClassLinker::RegisterOatFile(const OatFile* oat_file) { |
| WriterMutexLock mu(Thread::Current(), dex_lock_); |
| if (kIsDebugBuild) { |
| for (size_t i = 0; i < oat_files_.size(); ++i) { |
| CHECK_NE(oat_file, oat_files_[i]) << oat_file->GetLocation(); |
| } |
| } |
| VLOG(class_linker) << "Registering " << oat_file->GetLocation(); |
| oat_files_.push_back(oat_file); |
| return oat_file; |
| } |
| |
| OatFile& ClassLinker::GetImageOatFile(gc::space::ImageSpace* space) { |
| VLOG(startup) << "ClassLinker::GetImageOatFile entering"; |
| OatFile* oat_file = space->ReleaseOatFile(); |
| CHECK_EQ(RegisterOatFile(oat_file), oat_file); |
| VLOG(startup) << "ClassLinker::GetImageOatFile exiting"; |
| return *oat_file; |
| } |
| |
| const OatFile::OatDexFile* ClassLinker::FindOpenedOatDexFileForDexFile(const DexFile& dex_file) { |
| const char* dex_location = dex_file.GetLocation().c_str(); |
| uint32_t dex_location_checksum = dex_file.GetLocationChecksum(); |
| return FindOpenedOatDexFile(nullptr, dex_location, &dex_location_checksum); |
| } |
| |
| const OatFile::OatDexFile* ClassLinker::FindOpenedOatDexFile(const char* oat_location, |
| const char* dex_location, |
| const uint32_t* dex_location_checksum) { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| for (const OatFile* oat_file : oat_files_) { |
| DCHECK(oat_file != nullptr); |
| |
| if (oat_location != nullptr) { |
| if (oat_file->GetLocation() != oat_location) { |
| continue; |
| } |
| } |
| |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, |
| dex_location_checksum, |
| false); |
| if (oat_dex_file != nullptr) { |
| return oat_dex_file; |
| } |
| } |
| return nullptr; |
| } |
| |
| |
| // Loads all multi dex files from the given oat file returning true on success. |
| // |
| // Parameters: |
| // oat_file - the oat file to load from |
| // dex_location - the dex location used to generate the oat file |
| // dex_location_checksum - the checksum of the dex_location (may be null for pre-opted files) |
| // generated - whether or not the oat_file existed before or was just (re)generated |
| // error_msgs - any error messages will be appended here |
| // dex_files - the loaded dex_files will be appended here (only if the loading succeeds) |
| static bool LoadMultiDexFilesFromOatFile(const OatFile* oat_file, |
| const char* dex_location, |
| const uint32_t* dex_location_checksum, |
| bool generated, |
| std::vector<std::string>* error_msgs, |
| std::vector<const DexFile*>* dex_files) { |
| if (oat_file == nullptr) { |
| return false; |
| } |
| |
| size_t old_size = dex_files->size(); // To rollback on error. |
| |
| bool success = true; |
| for (size_t i = 0; success; ++i) { |
| std::string next_name_str = DexFile::GetMultiDexClassesDexName(i, dex_location); |
| const char* next_name = next_name_str.c_str(); |
| |
| uint32_t next_location_checksum; |
| uint32_t* next_location_checksum_pointer = &next_location_checksum; |
| std::string error_msg; |
| if ((i == 0) && (strcmp(next_name, dex_location) == 0)) { |
| // When i=0 the multidex name should be the same as the location name. We already have the |
| // checksum it so we don't need to recompute it. |
| if (dex_location_checksum == nullptr) { |
| next_location_checksum_pointer = nullptr; |
| } else { |
| next_location_checksum = *dex_location_checksum; |
| } |
| } else if (!DexFile::GetChecksum(next_name, next_location_checksum_pointer, &error_msg)) { |
| DCHECK_EQ(false, i == 0 && generated); |
| next_location_checksum_pointer = nullptr; |
| } |
| |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(next_name, nullptr, false); |
| |
| if (oat_dex_file == nullptr) { |
| if (i == 0 && generated) { |
| std::string error_msg; |
| error_msg = StringPrintf("\nFailed to find dex file '%s' (checksum 0x%x) in generated out " |
| " file'%s'", dex_location, next_location_checksum, |
| oat_file->GetLocation().c_str()); |
| error_msgs->push_back(error_msg); |
| } |
| break; // Not found, done. |
| } |
| |
| // Checksum test. Test must succeed when generated. |
| success = !generated; |
| if (next_location_checksum_pointer != nullptr) { |
| success = next_location_checksum == oat_dex_file->GetDexFileLocationChecksum(); |
| } |
| |
| if (success) { |
| const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg); |
| if (dex_file == nullptr) { |
| success = false; |
| error_msgs->push_back(error_msg); |
| } else { |
| dex_files->push_back(dex_file); |
| } |
| } |
| |
| // When we generated the file, we expect success, or something is terribly wrong. |
| CHECK_EQ(false, generated && !success) |
| << "dex_location=" << next_name << " oat_location=" << oat_file->GetLocation().c_str() |
| << std::hex << " dex_location_checksum=" << next_location_checksum |
| << " OatDexFile::GetLocationChecksum()=" << oat_dex_file->GetDexFileLocationChecksum(); |
| } |
| |
| if (dex_files->size() == old_size) { |
| success = false; // We did not even find classes.dex |
| } |
| |
| if (success) { |
| return true; |
| } else { |
| // Free all the dex files we have loaded. |
| auto it = dex_files->begin() + old_size; |
| auto it_end = dex_files->end(); |
| for (; it != it_end; it++) { |
| delete *it; |
| } |
| dex_files->erase(dex_files->begin() + old_size, it_end); |
| |
| return false; |
| } |
| } |
| |
| // Multidex files make it possible that some, but not all, dex files can be broken/outdated. This |
| // complicates the loading process, as we should not use an iterative loading process, because that |
| // would register the oat file and dex files that come before the broken one. Instead, check all |
| // multidex ahead of time. |
| bool ClassLinker::OpenDexFilesFromOat(const char* dex_location, const char* oat_location, |
| std::vector<std::string>* error_msgs, |
| std::vector<const DexFile*>* dex_files) { |
| // 1) Check whether we have an open oat file. |
| // This requires a dex checksum, use the "primary" one. |
| uint32_t dex_location_checksum; |
| uint32_t* dex_location_checksum_pointer = &dex_location_checksum; |
| bool have_checksum = true; |
| std::string checksum_error_msg; |
| if (!DexFile::GetChecksum(dex_location, dex_location_checksum_pointer, &checksum_error_msg)) { |
| // This happens for pre-opted files since the corresponding dex files are no longer on disk. |
| dex_location_checksum_pointer = nullptr; |
| have_checksum = false; |
| } |
| |
| bool needs_registering = false; |
| |
| const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFile(oat_location, dex_location, |
| dex_location_checksum_pointer); |
| std::unique_ptr<const OatFile> open_oat_file( |
| oat_dex_file != nullptr ? oat_dex_file->GetOatFile() : nullptr); |
| |
| // 2) If we do not have an open one, maybe there's one on disk already. |
| |
| // In case the oat file is not open, we play a locking game here so |
| // that if two different processes race to load and register or generate |
| // (or worse, one tries to open a partial generated file) we will be okay. |
| // This is actually common with apps that use DexClassLoader to work |
| // around the dex method reference limit and that have a background |
| // service running in a separate process. |
| ScopedFlock scoped_flock; |
| |
| if (open_oat_file.get() == nullptr) { |
| if (oat_location != nullptr) { |
| // Can only do this if we have a checksum, else error. |
| if (!have_checksum) { |
| error_msgs->push_back(checksum_error_msg); |
| return false; |
| } |
| |
| std::string error_msg; |
| |
| // We are loading or creating one in the future. Time to set up the file lock. |
| if (!scoped_flock.Init(oat_location, &error_msg)) { |
| error_msgs->push_back(error_msg); |
| return false; |
| } |
| |
| // TODO Caller specifically asks for this oat_location. We should honor it. Probably? |
| open_oat_file.reset(FindOatFileInOatLocationForDexFile(dex_location, dex_location_checksum, |
| oat_location, &error_msg)); |
| |
| if (open_oat_file.get() == nullptr) { |
| std::string compound_msg = StringPrintf("Failed to find dex file '%s' in oat location '%s': %s", |
| dex_location, oat_location, error_msg.c_str()); |
| VLOG(class_linker) << compound_msg; |
| error_msgs->push_back(compound_msg); |
| } |
| } else { |
| // TODO: What to lock here? |
| bool obsolete_file_cleanup_failed; |
| open_oat_file.reset(FindOatFileContainingDexFileFromDexLocation(dex_location, |
| dex_location_checksum_pointer, |
| kRuntimeISA, error_msgs, |
| &obsolete_file_cleanup_failed)); |
| // There's no point in going forward and eventually try to regenerate the |
| // file if we couldn't remove the obsolete one. Mostly likely we will fail |
| // with the same error when trying to write the new file. |
| // TODO: should we maybe do this only when we get permission issues? (i.e. EACCESS). |
| if (obsolete_file_cleanup_failed) { |
| return false; |
| } |
| } |
| needs_registering = true; |
| } |
| |
| // 3) If we have an oat file, check all contained multidex files for our dex_location. |
| // Note: LoadMultiDexFilesFromOatFile will check for nullptr in the first argument. |
| bool success = LoadMultiDexFilesFromOatFile(open_oat_file.get(), dex_location, |
| dex_location_checksum_pointer, |
| false, error_msgs, dex_files); |
| if (success) { |
| const OatFile* oat_file = open_oat_file.release(); // Avoid deleting it. |
| if (needs_registering) { |
| // We opened the oat file, so we must register it. |
| RegisterOatFile(oat_file); |
| } |
| // If the file isn't executable we failed patchoat but did manage to get the dex files. |
| return oat_file->IsExecutable(); |
| } else { |
| if (needs_registering) { |
| // We opened it, delete it. |
| open_oat_file.reset(); |
| } else { |
| open_oat_file.release(); // Do not delete open oat files. |
| } |
| } |
| |
| // 4) If it's not the case (either no oat file or mismatches), regenerate and load. |
| |
| // Need a checksum, fail else. |
| if (!have_checksum) { |
| error_msgs->push_back(checksum_error_msg); |
| return false; |
| } |
| |
| // Look in cache location if no oat_location is given. |
| std::string cache_location; |
| if (oat_location == nullptr) { |
| // Use the dalvik cache. |
| const std::string dalvik_cache(GetDalvikCacheOrDie(GetInstructionSetString(kRuntimeISA))); |
| cache_location = GetDalvikCacheFilenameOrDie(dex_location, dalvik_cache.c_str()); |
| oat_location = cache_location.c_str(); |
| } |
| |
| bool has_flock = true; |
| // Definitely need to lock now. |
| if (!scoped_flock.HasFile()) { |
| std::string error_msg; |
| if (!scoped_flock.Init(oat_location, &error_msg)) { |
| error_msgs->push_back(error_msg); |
| has_flock = false; |
| } |
| } |
| |
| if (Runtime::Current()->IsDex2OatEnabled() && has_flock && scoped_flock.HasFile()) { |
| // Create the oat file. |
| open_oat_file.reset(CreateOatFileForDexLocation(dex_location, scoped_flock.GetFile()->Fd(), |
| oat_location, error_msgs)); |
| } |
| |
| // Failed, bail. |
| if (open_oat_file.get() == nullptr) { |
| std::string error_msg; |
| // dex2oat was disabled or crashed. Add the dex file in the list of dex_files to make progress. |
| DexFile::Open(dex_location, dex_location, &error_msg, dex_files); |
| error_msgs->push_back(error_msg); |
| return false; |
| } |
| |
| // Try to load again, but stronger checks. |
| success = LoadMultiDexFilesFromOatFile(open_oat_file.get(), dex_location, |
| dex_location_checksum_pointer, |
| true, error_msgs, dex_files); |
| if (success) { |
| RegisterOatFile(open_oat_file.release()); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| const OatFile* ClassLinker::FindOatFileInOatLocationForDexFile(const char* dex_location, |
| uint32_t dex_location_checksum, |
| const char* oat_location, |
| std::string* error_msg) { |
| std::unique_ptr<OatFile> oat_file(OatFile::Open(oat_location, oat_location, nullptr, |
| !Runtime::Current()->IsCompiler(), |
| error_msg)); |
| if (oat_file.get() == nullptr) { |
| *error_msg = StringPrintf("Failed to find existing oat file at %s: %s", oat_location, |
| error_msg->c_str()); |
| return nullptr; |
| } |
| Runtime* runtime = Runtime::Current(); |
| const gc::space::ImageSpace* image_space = runtime->GetHeap()->GetImageSpace(); |
| if (image_space != nullptr) { |
| const ImageHeader& image_header = image_space->GetImageHeader(); |
| uint32_t expected_image_oat_checksum = image_header.GetOatChecksum(); |
| uint32_t actual_image_oat_checksum = oat_file->GetOatHeader().GetImageFileLocationOatChecksum(); |
| if (expected_image_oat_checksum != actual_image_oat_checksum) { |
| *error_msg = StringPrintf("Failed to find oat file at '%s' with expected image oat checksum of " |
| "0x%x, found 0x%x", oat_location, expected_image_oat_checksum, |
| actual_image_oat_checksum); |
| return nullptr; |
| } |
| |
| uintptr_t expected_image_oat_offset = reinterpret_cast<uintptr_t>(image_header.GetOatDataBegin()); |
| uint32_t actual_image_oat_offset = oat_file->GetOatHeader().GetImageFileLocationOatDataBegin(); |
| if (expected_image_oat_offset != actual_image_oat_offset) { |
| *error_msg = StringPrintf("Failed to find oat file at '%s' with expected image oat offset %" |
| PRIuPTR ", found %ud", oat_location, expected_image_oat_offset, |
| actual_image_oat_offset); |
| return nullptr; |
| } |
| int32_t expected_patch_delta = image_header.GetPatchDelta(); |
| int32_t actual_patch_delta = oat_file->GetOatHeader().GetImagePatchDelta(); |
| if (expected_patch_delta != actual_patch_delta) { |
| *error_msg = StringPrintf("Failed to find oat file at '%s' with expected patch delta %d, " |
| " found %d", oat_location, expected_patch_delta, actual_patch_delta); |
| return nullptr; |
| } |
| } |
| |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, |
| &dex_location_checksum); |
| if (oat_dex_file == nullptr) { |
| *error_msg = StringPrintf("Failed to find oat file at '%s' containing '%s'", oat_location, |
| dex_location); |
| return nullptr; |
| } |
| uint32_t expected_dex_checksum = dex_location_checksum; |
| uint32_t actual_dex_checksum = oat_dex_file->GetDexFileLocationChecksum(); |
| if (expected_dex_checksum != actual_dex_checksum) { |
| *error_msg = StringPrintf("Failed to find oat file at '%s' with expected dex checksum of 0x%x, " |
| "found 0x%x", oat_location, expected_dex_checksum, |
| actual_dex_checksum); |
| return nullptr; |
| } |
| std::unique_ptr<const DexFile> dex_file(oat_dex_file->OpenDexFile(error_msg)); |
| if (dex_file.get() != nullptr) { |
| return oat_file.release(); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| const OatFile* ClassLinker::CreateOatFileForDexLocation(const char* dex_location, |
| int fd, const char* oat_location, |
| std::vector<std::string>* error_msgs) { |
| // Generate the output oat file for the dex file |
| VLOG(class_linker) << "Generating oat file " << oat_location << " for " << dex_location; |
| std::string error_msg; |
| if (!GenerateOatFile(dex_location, fd, oat_location, &error_msg)) { |
| CHECK(!error_msg.empty()); |
| error_msgs->push_back(error_msg); |
| return nullptr; |
| } |
| std::unique_ptr<OatFile> oat_file(OatFile::Open(oat_location, oat_location, nullptr, |
| !Runtime::Current()->IsCompiler(), |
| &error_msg)); |
| if (oat_file.get() == nullptr) { |
| std::string compound_msg = StringPrintf("\nFailed to open generated oat file '%s': %s", |
| oat_location, error_msg.c_str()); |
| error_msgs->push_back(compound_msg); |
| return nullptr; |
| } |
| |
| return oat_file.release(); |
| } |
| |
| bool ClassLinker::VerifyOatImageChecksum(const OatFile* oat_file, |
| const InstructionSet instruction_set) { |
| Runtime* runtime = Runtime::Current(); |
| const gc::space::ImageSpace* image_space = runtime->GetHeap()->GetImageSpace(); |
| if (image_space == nullptr) { |
| return false; |
| } |
| uint32_t image_oat_checksum = 0; |
| if (instruction_set == kRuntimeISA) { |
| const ImageHeader& image_header = image_space->GetImageHeader(); |
| image_oat_checksum = image_header.GetOatChecksum(); |
| } else { |
| std::unique_ptr<ImageHeader> image_header(gc::space::ImageSpace::ReadImageHeaderOrDie( |
| image_space->GetImageLocation().c_str(), instruction_set)); |
| image_oat_checksum = image_header->GetOatChecksum(); |
| } |
| return oat_file->GetOatHeader().GetImageFileLocationOatChecksum() == image_oat_checksum; |
| } |
| |
| bool ClassLinker::VerifyOatChecksums(const OatFile* oat_file, |
| const InstructionSet instruction_set, |
| std::string* error_msg) { |
| Runtime* runtime = Runtime::Current(); |
| const gc::space::ImageSpace* image_space = runtime->GetHeap()->GetImageSpace(); |
| if (image_space == nullptr) { |
| *error_msg = "No image space for verification against"; |
| return false; |
| } |
| |
| // If the requested instruction set is the same as the current runtime, |
| // we can use the checksums directly. If it isn't, we'll have to read the |
| // image header from the image for the right instruction set. |
| uint32_t image_oat_checksum = 0; |
| uintptr_t image_oat_data_begin = 0; |
| int32_t image_patch_delta = 0; |
| if (instruction_set == runtime->GetInstructionSet()) { |
| const ImageHeader& image_header = image_space->GetImageHeader(); |
| image_oat_checksum = image_header.GetOatChecksum(); |
| image_oat_data_begin = reinterpret_cast<uintptr_t>(image_header.GetOatDataBegin()); |
| image_patch_delta = image_header.GetPatchDelta(); |
| } else { |
| std::unique_ptr<ImageHeader> image_header(gc::space::ImageSpace::ReadImageHeaderOrDie( |
| image_space->GetImageLocation().c_str(), instruction_set)); |
| image_oat_checksum = image_header->GetOatChecksum(); |
| image_oat_data_begin = reinterpret_cast<uintptr_t>(image_header->GetOatDataBegin()); |
| image_patch_delta = image_header->GetPatchDelta(); |
| } |
| const OatHeader& oat_header = oat_file->GetOatHeader(); |
| bool ret = ((oat_header.GetImageFileLocationOatChecksum() == image_oat_checksum) |
| && (oat_header.GetImagePatchDelta() == image_patch_delta) |
| && (oat_header.GetImageFileLocationOatDataBegin() == image_oat_data_begin)); |
| if (!ret) { |
| *error_msg = StringPrintf("oat file '%s' mismatch (0x%x, %d, %d) with (0x%x, %" PRIdPTR ", %d)", |
| oat_file->GetLocation().c_str(), |
| oat_file->GetOatHeader().GetImageFileLocationOatChecksum(), |
| oat_file->GetOatHeader().GetImageFileLocationOatDataBegin(), |
| oat_file->GetOatHeader().GetImagePatchDelta(), |
| image_oat_checksum, image_oat_data_begin, image_patch_delta); |
| } |
| return ret; |
| } |
| |
| bool ClassLinker::VerifyOatAndDexFileChecksums(const OatFile* oat_file, |
| const char* dex_location, |
| uint32_t dex_location_checksum, |
| const InstructionSet instruction_set, |
| std::string* error_msg) { |
| if (!VerifyOatChecksums(oat_file, instruction_set, error_msg)) { |
| return false; |
| } |
| |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, |
| &dex_location_checksum); |
| if (oat_dex_file == nullptr) { |
| *error_msg = StringPrintf("oat file '%s' does not contain contents for '%s' with checksum 0x%x", |
| oat_file->GetLocation().c_str(), dex_location, dex_location_checksum); |
| for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { |
| *error_msg += StringPrintf("\noat file '%s' contains contents for '%s' with checksum 0x%x", |
| oat_file->GetLocation().c_str(), |
| oat_dex_file->GetDexFileLocation().c_str(), |
| oat_dex_file->GetDexFileLocationChecksum()); |
| } |
| return false; |
| } |
| |
| DCHECK_EQ(dex_location_checksum, oat_dex_file->GetDexFileLocationChecksum()); |
| return true; |
| } |
| |
| bool ClassLinker::VerifyOatWithDexFile(const OatFile* oat_file, |
| const char* dex_location, |
| const uint32_t* dex_location_checksum, |
| std::string* error_msg) { |
| CHECK(oat_file != nullptr); |
| CHECK(dex_location != nullptr); |
| std::unique_ptr<const DexFile> dex_file; |
| if (dex_location_checksum == nullptr) { |
| // If no classes.dex found in dex_location, it has been stripped or is corrupt, assume oat is |
| // up-to-date. This is the common case in user builds for jar's and apk's in the /system |
| // directory. |
| const OatFile::OatDexFile* oat_dex_file = oat_file->GetOatDexFile(dex_location, nullptr); |
| if (oat_dex_file == nullptr) { |
| *error_msg = StringPrintf("Dex checksum mismatch for location '%s' and failed to find oat " |
| "dex file '%s': %s", oat_file->GetLocation().c_str(), dex_location, |
| error_msg->c_str()); |
| return false; |
| } |
| dex_file.reset(oat_dex_file->OpenDexFile(error_msg)); |
| } else { |
| bool verified = VerifyOatAndDexFileChecksums(oat_file, dex_location, *dex_location_checksum, |
| kRuntimeISA, error_msg); |
| if (!verified) { |
| return false; |
| } |
| dex_file.reset(oat_file->GetOatDexFile(dex_location, |
| dex_location_checksum)->OpenDexFile(error_msg)); |
| } |
| return dex_file.get() != nullptr; |
| } |
| |
| const OatFile* ClassLinker::FindOatFileContainingDexFileFromDexLocation( |
| const char* dex_location, |
| const uint32_t* dex_location_checksum, |
| InstructionSet isa, |
| std::vector<std::string>* error_msgs, |
| bool* obsolete_file_cleanup_failed) { |
| *obsolete_file_cleanup_failed = false; |
| bool already_opened = false; |
| std::string dex_location_str(dex_location); |
| std::unique_ptr<const OatFile> oat_file(OpenOatFileFromDexLocation(dex_location_str, isa, |
| &already_opened, |
| obsolete_file_cleanup_failed, |
| error_msgs)); |
| std::string error_msg; |
| if (oat_file.get() == nullptr) { |
| error_msgs->push_back(StringPrintf("Failed to open oat file from dex location '%s'", |
| dex_location)); |
| return nullptr; |
| } else if (oat_file->IsExecutable() && |
| !VerifyOatWithDexFile(oat_file.get(), dex_location, |
| dex_location_checksum, &error_msg)) { |
| error_msgs->push_back(StringPrintf("Failed to verify oat file '%s' found for dex location " |
| "'%s': %s", oat_file->GetLocation().c_str(), dex_location, |
| error_msg.c_str())); |
| return nullptr; |
| } else if (!oat_file->IsExecutable() && |
| Runtime::Current()->GetHeap()->HasImageSpace() && |
| !VerifyOatImageChecksum(oat_file.get(), isa)) { |
| error_msgs->push_back(StringPrintf("Failed to verify non-executable oat file '%s' found for " |
| "dex location '%s'. Image checksum incorrect.", |
| oat_file->GetLocation().c_str(), dex_location)); |
| return nullptr; |
| } else { |
| return oat_file.release(); |
| } |
| } |
| |
| const OatFile* ClassLinker::FindOpenedOatFileFromOatLocation(const std::string& oat_location) { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| for (size_t i = 0; i < oat_files_.size(); i++) { |
| const OatFile* oat_file = oat_files_[i]; |
| DCHECK(oat_file != nullptr); |
| if (oat_file->GetLocation() == oat_location) { |
| return oat_file; |
| } |
| } |
| return nullptr; |
| } |
| |
| const OatFile* ClassLinker::OpenOatFileFromDexLocation(const std::string& dex_location, |
| InstructionSet isa, |
| bool *already_opened, |
| bool *obsolete_file_cleanup_failed, |
| std::vector<std::string>* error_msgs) { |
| // Find out if we've already opened the file |
| const OatFile* ret = nullptr; |
| std::string odex_filename(DexFilenameToOdexFilename(dex_location, isa)); |
| ret = FindOpenedOatFileFromOatLocation(odex_filename); |
| if (ret != nullptr) { |
| *already_opened = true; |
| return ret; |
| } |
| |
| std::string dalvik_cache; |
| bool have_android_data = false; |
| bool have_dalvik_cache = false; |
| bool is_global_cache = false; |
| GetDalvikCache(GetInstructionSetString(kRuntimeISA), false, &dalvik_cache, |
| &have_android_data, &have_dalvik_cache, &is_global_cache); |
| std::string cache_filename; |
| if (have_dalvik_cache) { |
| cache_filename = GetDalvikCacheFilenameOrDie(dex_location.c_str(), dalvik_cache.c_str()); |
| ret = FindOpenedOatFileFromOatLocation(cache_filename); |
| if (ret != nullptr) { |
| *already_opened = true; |
| return ret; |
| } |
| } else { |
| // If we need to relocate we should just place odex back where it started. |
| cache_filename = odex_filename; |
| } |
| |
| ret = nullptr; |
| |
| // We know that neither the odex nor the cache'd version is already in use, if it even exists. |
| // |
| // Now we do the following: |
| // 1) Try and open the odex version |
| // 2) If present, checksum-verified & relocated correctly return it |
| // 3) Close the odex version to free up its address space. |
| // 4) Try and open the cache version |
| // 5) If present, checksum-verified & relocated correctly return it |
| // 6) Close the cache version to free up its address space. |
| // 7) If we should relocate: |
| // a) If we have opened and checksum-verified the odex version relocate it to |
| // 'cache_filename' and return it |
| // b) If we have opened and checksum-verified the cache version relocate it in place and return |
| // it. This should not happen often (I think only the run-test's will hit this case). |
| // 8) If the cache-version was present we should delete it since it must be obsolete if we get to |
| // this point. |
| // 9) Return nullptr |
| |
| *already_opened = false; |
| const Runtime* runtime = Runtime::Current(); |
| CHECK(runtime != nullptr); |
| bool executable = !runtime->IsCompiler(); |
| |
| std::string odex_error_msg; |
| bool should_patch_system = false; |
| bool odex_checksum_verified = false; |
| bool have_system_odex = false; |
| { |
| // There is a high probability that these both these oat files map similar/the same address |
| // spaces so we must scope them like this so they each gets its turn. |
| std::unique_ptr<OatFile> odex_oat_file(OatFile::Open(odex_filename, odex_filename, nullptr, |
| executable, &odex_error_msg)); |
| if (odex_oat_file.get() != nullptr && CheckOatFile(odex_oat_file.get(), isa, |
| &odex_checksum_verified, |
| &odex_error_msg)) { |
| return odex_oat_file.release(); |
| } else { |
| if (odex_checksum_verified) { |
| // We can just relocate |
| should_patch_system = true; |
| odex_error_msg = "Image Patches are incorrect"; |
| } |
| if (odex_oat_file.get() != nullptr) { |
| have_system_odex = true; |
| } |
| } |
| } |
| |
| std::string cache_error_msg; |
| bool should_patch_cache = false; |
| bool cache_checksum_verified = false; |
| if (have_dalvik_cache) { |
| std::unique_ptr<OatFile> cache_oat_file(OatFile::Open(cache_filename, cache_filename, nullptr, |
| executable, &cache_error_msg)); |
| if (cache_oat_file.get() != nullptr && CheckOatFile(cache_oat_file.get(), isa, |
| &cache_checksum_verified, |
| &cache_error_msg)) { |
| return cache_oat_file.release(); |
| } else if (cache_checksum_verified) { |
| // We can just relocate |
| should_patch_cache = true; |
| cache_error_msg = "Image Patches are incorrect"; |
| } |
| } else if (have_android_data) { |
| // dalvik_cache does not exist but android data does. This means we should be able to create |
| // it, so we should try. |
| GetDalvikCacheOrDie(GetInstructionSetString(kRuntimeISA), true); |
| } |
| |
| ret = nullptr; |
| std::string error_msg; |
| if (runtime->CanRelocate()) { |
| // Run relocation |
| gc::space::ImageSpace* space = Runtime::Current()->GetHeap()->GetImageSpace(); |
| if (space != nullptr) { |
| const std::string& image_location = space->GetImageLocation(); |
| if (odex_checksum_verified && should_patch_system) { |
| ret = PatchAndRetrieveOat(odex_filename, cache_filename, image_location, isa, &error_msg); |
| } else if (cache_checksum_verified && should_patch_cache) { |
| CHECK(have_dalvik_cache); |
| ret = PatchAndRetrieveOat(cache_filename, cache_filename, image_location, isa, &error_msg); |
| } |
| } else if (have_system_odex) { |
| ret = GetInterpretedOnlyOat(odex_filename, isa, &error_msg); |
| } |
| } |
| if (ret == nullptr && have_dalvik_cache && OS::FileExists(cache_filename.c_str())) { |
| // implicitly: were able to fine where the cached version is but we were unable to use it, |
| // either as a destination for relocation or to open a file. We should delete it if it is |
| // there. |
| if (TEMP_FAILURE_RETRY(unlink(cache_filename.c_str())) != 0) { |
| std::string rm_error_msg = StringPrintf("Failed to remove obsolete file from %s when " |
| "searching for dex file %s: %s", |
| cache_filename.c_str(), dex_location.c_str(), |
| strerror(errno)); |
| error_msgs->push_back(rm_error_msg); |
| VLOG(class_linker) << rm_error_msg; |
| // Let the caller know that we couldn't remove the obsolete file. |
| // This is a good indication that further writes may fail as well. |
| *obsolete_file_cleanup_failed = true; |
| } |
| } |
| if (ret == nullptr) { |
| VLOG(class_linker) << error_msg; |
| error_msgs->push_back(error_msg); |
| std::string relocation_msg; |
| if (runtime->CanRelocate()) { |
| relocation_msg = StringPrintf(" and relocation failed"); |
| } |
| if (have_dalvik_cache && cache_checksum_verified) { |
| error_msg = StringPrintf("Failed to open oat file from %s (error %s) or %s " |
| "(error %s)%s.", odex_filename.c_str(), odex_error_msg.c_str(), |
| cache_filename.c_str(), cache_error_msg.c_str(), |
| relocation_msg.c_str()); |
| } else { |
| error_msg = StringPrintf("Failed to open oat file from %s (error %s) (no " |
| "dalvik_cache availible)%s.", odex_filename.c_str(), |
| odex_error_msg.c_str(), relocation_msg.c_str()); |
| } |
| VLOG(class_linker) << error_msg; |
| error_msgs->push_back(error_msg); |
| } |
| return ret; |
| } |
| |
| const OatFile* ClassLinker::GetInterpretedOnlyOat(const std::string& oat_path, |
| InstructionSet isa, |
| std::string* error_msg) { |
| // We open it non-executable |
| std::unique_ptr<OatFile> output(OatFile::Open(oat_path, oat_path, nullptr, false, error_msg)); |
| if (output.get() == nullptr) { |
| return nullptr; |
| } |
| if (!Runtime::Current()->GetHeap()->HasImageSpace() || |
| VerifyOatImageChecksum(output.get(), isa)) { |
| return output.release(); |
| } else { |
| *error_msg = StringPrintf("Could not use oat file '%s', image checksum failed to verify.", |
| oat_path.c_str()); |
| return nullptr; |
| } |
| } |
| |
| const OatFile* ClassLinker::PatchAndRetrieveOat(const std::string& input_oat, |
| const std::string& output_oat, |
| const std::string& image_location, |
| InstructionSet isa, |
| std::string* error_msg) { |
| if (!Runtime::Current()->GetHeap()->HasImageSpace()) { |
| // We don't have an image space so there is no point in trying to patchoat. |
| LOG(WARNING) << "Patching of oat file '" << input_oat << "' not attempted because we are " |
| << "running without an image. Attempting to use oat file for interpretation."; |
| return GetInterpretedOnlyOat(input_oat, isa, error_msg); |
| } |
| if (!Runtime::Current()->IsDex2OatEnabled()) { |
| // We don't have dex2oat so we can assume we don't have patchoat either. We should just use the |
| // input_oat but make sure we only do interpretation on it's dex files. |
| LOG(WARNING) << "Patching of oat file '" << input_oat << "' not attempted due to dex2oat being " |
| << "disabled. Attempting to use oat file for interpretation"; |
| return GetInterpretedOnlyOat(input_oat, isa, error_msg); |
| } |
| Locks::mutator_lock_->AssertNotHeld(Thread::Current()); // Avoid starving GC. |
| std::string patchoat(Runtime::Current()->GetPatchoatExecutable()); |
| |
| std::string isa_arg("--instruction-set="); |
| isa_arg += GetInstructionSetString(isa); |
| std::string input_oat_filename_arg("--input-oat-file="); |
| input_oat_filename_arg += input_oat; |
| std::string output_oat_filename_arg("--output-oat-file="); |
| output_oat_filename_arg += output_oat; |
| std::string patched_image_arg("--patched-image-location="); |
| patched_image_arg += image_location; |
| |
| std::vector<std::string> argv; |
| argv.push_back(patchoat); |
| argv.push_back(isa_arg); |
| argv.push_back(input_oat_filename_arg); |
| argv.push_back(output_oat_filename_arg); |
| argv.push_back(patched_image_arg); |
| |
| std::string command_line(Join(argv, ' ')); |
| LOG(INFO) << "Relocate Oat File: " << command_line; |
| bool success = Exec(argv, error_msg); |
| if (success) { |
| std::unique_ptr<OatFile> output(OatFile::Open(output_oat, output_oat, nullptr, |
| !Runtime::Current()->IsCompiler(), error_msg)); |
| bool checksum_verified = false; |
| if (output.get() != nullptr && CheckOatFile(output.get(), isa, &checksum_verified, error_msg)) { |
| return output.release(); |
| } else if (output.get() != nullptr) { |
| *error_msg = StringPrintf("Patching of oat file '%s' succeeded " |
| "but output file '%s' failed verifcation: %s", |
| input_oat.c_str(), output_oat.c_str(), error_msg->c_str()); |
| } else { |
| *error_msg = StringPrintf("Patching of oat file '%s' succeeded " |
| "but was unable to open output file '%s': %s", |
| input_oat.c_str(), output_oat.c_str(), error_msg->c_str()); |
| } |
| } else if (!Runtime::Current()->IsCompiler()) { |
| // patchoat failed which means we probably don't have enough room to place the output oat file, |
| // instead of failing we should just run the interpreter from the dex files in the input oat. |
| LOG(WARNING) << "Patching of oat file '" << input_oat << "' failed. Attempting to use oat file " |
| << "for interpretation. patchoat failure was: " << *error_msg; |
| return GetInterpretedOnlyOat(input_oat, isa, error_msg); |
| } else { |
| *error_msg = StringPrintf("Patching of oat file '%s to '%s' " |
| "failed: %s", input_oat.c_str(), output_oat.c_str(), |
| error_msg->c_str()); |
| } |
| return nullptr; |
| } |
| |
| int32_t ClassLinker::GetRequiredDelta(const OatFile* oat_file, InstructionSet isa) { |
| Runtime* runtime = Runtime::Current(); |
| int32_t real_patch_delta; |
| const gc::space::ImageSpace* image_space = runtime->GetHeap()->GetImageSpace(); |
| CHECK(image_space != nullptr); |
| if (isa == Runtime::Current()->GetInstructionSet()) { |
| const ImageHeader& image_header = image_space->GetImageHeader(); |
| real_patch_delta = image_header.GetPatchDelta(); |
| } else { |
| std::unique_ptr<ImageHeader> image_header(gc::space::ImageSpace::ReadImageHeaderOrDie( |
| image_space->GetImageLocation().c_str(), isa)); |
| real_patch_delta = image_header->GetPatchDelta(); |
| } |
| const OatHeader& oat_header = oat_file->GetOatHeader(); |
| return real_patch_delta - oat_header.GetImagePatchDelta(); |
| } |
| |
| bool ClassLinker::CheckOatFile(const OatFile* oat_file, InstructionSet isa, |
| bool* checksum_verified, |
| std::string* error_msg) { |
| Runtime* runtime = Runtime::Current(); |
| const gc::space::ImageSpace* image_space = runtime->GetHeap()->GetImageSpace(); |
| if (image_space == nullptr) { |
| *error_msg = "No image space present"; |
| return false; |
| } |
| uint32_t real_image_checksum; |
| void* real_image_oat_offset; |
| int32_t real_patch_delta; |
| if (isa == runtime->GetInstructionSet()) { |
| const ImageHeader& image_header = image_space->GetImageHeader(); |
| real_image_checksum = image_header.GetOatChecksum(); |
| real_image_oat_offset = image_header.GetOatDataBegin(); |
| real_patch_delta = image_header.GetPatchDelta(); |
| } else { |
| std::unique_ptr<ImageHeader> image_header(gc::space::ImageSpace::ReadImageHeaderOrDie( |
| image_space->GetImageLocation().c_str(), isa)); |
| real_image_checksum = image_header->GetOatChecksum(); |
| real_image_oat_offset = image_header->GetOatDataBegin(); |
| real_patch_delta = image_header->GetPatchDelta(); |
| } |
| |
| const OatHeader& oat_header = oat_file->GetOatHeader(); |
| std::string compound_msg; |
| |
| uint32_t oat_image_checksum = oat_header.GetImageFileLocationOatChecksum(); |
| *checksum_verified = oat_image_checksum == real_image_checksum; |
| if (!*checksum_verified) { |
| StringAppendF(&compound_msg, " Oat Image Checksum Incorrect (expected 0x%x, received 0x%x)", |
| real_image_checksum, oat_image_checksum); |
| } |
| |
| void* oat_image_oat_offset = |
| reinterpret_cast<void*>(oat_header.GetImageFileLocationOatDataBegin()); |
| bool offset_verified = oat_image_oat_offset == real_image_oat_offset; |
| if (!offset_verified) { |
| StringAppendF(&compound_msg, " Oat Image oat offset incorrect (expected 0x%p, received 0x%p)", |
| real_image_oat_offset, oat_image_oat_offset); |
| } |
| |
| int32_t oat_patch_delta = oat_header.GetImagePatchDelta(); |
| bool patch_delta_verified = oat_patch_delta == real_patch_delta; |
| if (!patch_delta_verified) { |
| StringAppendF(&compound_msg, " Oat image patch delta incorrect (expected 0x%x, received 0x%x)", |
| real_patch_delta, oat_patch_delta); |
| } |
| |
| bool ret = (*checksum_verified && offset_verified && patch_delta_verified); |
| if (!ret) { |
| *error_msg = "Oat file failed to verify:" + compound_msg; |
| } |
| return ret; |
| } |
| |
| const OatFile* ClassLinker::FindOatFileFromOatLocation(const std::string& oat_location, |
| std::string* error_msg) { |
| const OatFile* oat_file = FindOpenedOatFileFromOatLocation(oat_location); |
| if (oat_file != nullptr) { |
| return oat_file; |
| } |
| |
| return OatFile::Open(oat_location, oat_location, nullptr, !Runtime::Current()->IsCompiler(), |
| error_msg); |
| } |
| |
| static void InitFromImageInterpretOnlyCallback(mirror::Object* obj, void* arg) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ClassLinker* class_linker = reinterpret_cast<ClassLinker*>(arg); |
| |
| DCHECK(obj != nullptr); |
| DCHECK(class_linker != nullptr); |
| |
| if (obj->IsArtMethod()) { |
| mirror::ArtMethod* method = obj->AsArtMethod(); |
| if (!method->IsNative()) { |
| method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge); |
| if (method != Runtime::Current()->GetResolutionMethod()) { |
| method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableToInterpreterBridge()); |
| } |
| } |
| } |
| } |
| |
| void ClassLinker::InitFromImage() { |
| VLOG(startup) << "ClassLinker::InitFromImage entering"; |
| CHECK(!init_done_); |
| |
| Thread* self = Thread::Current(); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| gc::space::ImageSpace* space = heap->GetImageSpace(); |
| dex_cache_image_class_lookup_required_ = true; |
| CHECK(space != nullptr); |
| OatFile& oat_file = GetImageOatFile(space); |
| CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatChecksum(), 0U); |
| CHECK_EQ(oat_file.GetOatHeader().GetImageFileLocationOatDataBegin(), 0U); |
| const char* image_file_location = oat_file.GetOatHeader(). |
| GetStoreValueByKey(OatHeader::kImageLocationKey); |
| CHECK(image_file_location == nullptr || *image_file_location == 0); |
| portable_resolution_trampoline_ = oat_file.GetOatHeader().GetPortableResolutionTrampoline(); |
| quick_resolution_trampoline_ = oat_file.GetOatHeader().GetQuickResolutionTrampoline(); |
| portable_imt_conflict_trampoline_ = oat_file.GetOatHeader().GetPortableImtConflictTrampoline(); |
| quick_imt_conflict_trampoline_ = oat_file.GetOatHeader().GetQuickImtConflictTrampoline(); |
| quick_generic_jni_trampoline_ = oat_file.GetOatHeader().GetQuickGenericJniTrampoline(); |
| quick_to_interpreter_bridge_trampoline_ = oat_file.GetOatHeader().GetQuickToInterpreterBridge(); |
| mirror::Object* dex_caches_object = space->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches); |
| mirror::ObjectArray<mirror::DexCache>* dex_caches = |
| dex_caches_object->AsObjectArray<mirror::DexCache>(); |
| |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ObjectArray<mirror::Class>> class_roots(hs.NewHandle( |
| space->GetImageHeader().GetImageRoot(ImageHeader::kClassRoots)-> |
| AsObjectArray<mirror::Class>())); |
| class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class>>(class_roots.Get()); |
| |
| // Special case of setting up the String class early so that we can test arbitrary objects |
| // as being Strings or not |
| mirror::String::SetClass(GetClassRoot(kJavaLangString)); |
| |
| CHECK_EQ(oat_file.GetOatHeader().GetDexFileCount(), |
| static_cast<uint32_t>(dex_caches->GetLength())); |
| for (int32_t i = 0; i < dex_caches->GetLength(); i++) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(dex_caches->Get(i))); |
| const std::string& dex_file_location(dex_cache->GetLocation()->ToModifiedUtf8()); |
| const OatFile::OatDexFile* oat_dex_file = oat_file.GetOatDexFile(dex_file_location.c_str(), |
| nullptr); |
| CHECK(oat_dex_file != nullptr) << oat_file.GetLocation() << " " << dex_file_location; |
| std::string error_msg; |
| const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg); |
| if (dex_file == nullptr) { |
| LOG(FATAL) << "Failed to open dex file " << dex_file_location |
| << " from within oat file " << oat_file.GetLocation() |
| << " error '" << error_msg << "'"; |
| } |
| |
| CHECK_EQ(dex_file->GetLocationChecksum(), oat_dex_file->GetDexFileLocationChecksum()); |
| |
| AppendToBootClassPath(*dex_file, dex_cache); |
| } |
| |
| // Set classes on AbstractMethod early so that IsMethod tests can be performed during the live |
| // bitmap walk. |
| mirror::ArtMethod::SetClass(GetClassRoot(kJavaLangReflectArtMethod)); |
| |
| // Set entry point to interpreter if in InterpretOnly mode. |
| if (Runtime::Current()->GetInstrumentation()->InterpretOnly()) { |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| heap->VisitObjects(InitFromImageInterpretOnlyCallback, this); |
| } |
| |
| // reinit class_roots_ |
| mirror::Class::SetClassClass(class_roots->Get(kJavaLangClass)); |
| class_roots_ = GcRoot<mirror::ObjectArray<mirror::Class>>(class_roots.Get()); |
| |
| // reinit array_iftable_ from any array class instance, they should be == |
| array_iftable_ = GcRoot<mirror::IfTable>(GetClassRoot(kObjectArrayClass)->GetIfTable()); |
| DCHECK(array_iftable_.Read() == GetClassRoot(kBooleanArrayClass)->GetIfTable()); |
| // String class root was set above |
| mirror::Reference::SetClass(GetClassRoot(kJavaLangRefReference)); |
| mirror::ArtField::SetClass(GetClassRoot(kJavaLangReflectArtField)); |
| mirror::BooleanArray::SetArrayClass(GetClassRoot(kBooleanArrayClass)); |
| mirror::ByteArray::SetArrayClass(GetClassRoot(kByteArrayClass)); |
| mirror::CharArray::SetArrayClass(GetClassRoot(kCharArrayClass)); |
| mirror::DoubleArray::SetArrayClass(GetClassRoot(kDoubleArrayClass)); |
| mirror::FloatArray::SetArrayClass(GetClassRoot(kFloatArrayClass)); |
| mirror::IntArray::SetArrayClass(GetClassRoot(kIntArrayClass)); |
| mirror::LongArray::SetArrayClass(GetClassRoot(kLongArrayClass)); |
| mirror::ShortArray::SetArrayClass(GetClassRoot(kShortArrayClass)); |
| mirror::Throwable::SetClass(GetClassRoot(kJavaLangThrowable)); |
| mirror::StackTraceElement::SetClass(GetClassRoot(kJavaLangStackTraceElement)); |
| |
| FinishInit(self); |
| |
| VLOG(startup) << "ClassLinker::InitFromImage exiting"; |
| } |
| |
| void ClassLinker::VisitClassRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { |
| WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| if ((flags & kVisitRootFlagAllRoots) != 0) { |
| for (std::pair<const size_t, GcRoot<mirror::Class> >& it : class_table_) { |
| it.second.VisitRoot(callback, arg, 0, kRootStickyClass); |
| } |
| } else if ((flags & kVisitRootFlagNewRoots) != 0) { |
| for (auto& pair : new_class_roots_) { |
| mirror::Class* old_ref = pair.second.Read<kWithoutReadBarrier>(); |
| pair.second.VisitRoot(callback, arg, 0, kRootStickyClass); |
| mirror::Class* new_ref = pair.second.Read<kWithoutReadBarrier>(); |
| if (UNLIKELY(new_ref != old_ref)) { |
| // Uh ohes, GC moved a root in the log. Need to search the class_table and update the |
| // corresponding object. This is slow, but luckily for us, this may only happen with a |
| // concurrent moving GC. |
| for (auto it = class_table_.lower_bound(pair.first), end = class_table_.end(); |
| it != end && it->first == pair.first; ++it) { |
| // If the class stored matches the old class, update it to the new value. |
| if (old_ref == it->second.Read<kWithoutReadBarrier>()) { |
| it->second = GcRoot<mirror::Class>(new_ref); |
| } |
| } |
| } |
| } |
| } |
| if ((flags & kVisitRootFlagClearRootLog) != 0) { |
| new_class_roots_.clear(); |
| } |
| if ((flags & kVisitRootFlagStartLoggingNewRoots) != 0) { |
| log_new_class_table_roots_ = true; |
| } else if ((flags & kVisitRootFlagStopLoggingNewRoots) != 0) { |
| log_new_class_table_roots_ = false; |
| } |
| // We deliberately ignore the class roots in the image since we |
| // handle image roots by using the MS/CMS rescanning of dirty cards. |
| } |
| |
| // Keep in sync with InitCallback. Anything we visit, we need to |
| // reinit references to when reinitializing a ClassLinker from a |
| // mapped image. |
| void ClassLinker::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { |
| class_roots_.VisitRoot(callback, arg, 0, kRootVMInternal); |
| Thread* self = Thread::Current(); |
| { |
| ReaderMutexLock mu(self, dex_lock_); |
| if ((flags & kVisitRootFlagAllRoots) != 0) { |
| for (GcRoot<mirror::DexCache>& dex_cache : dex_caches_) { |
| dex_cache.VisitRoot(callback, arg, 0, kRootVMInternal); |
| } |
| } else if ((flags & kVisitRootFlagNewRoots) != 0) { |
| for (size_t index : new_dex_cache_roots_) { |
| dex_caches_[index].VisitRoot(callback, arg, 0, kRootVMInternal); |
| } |
| } |
| if ((flags & kVisitRootFlagClearRootLog) != 0) { |
| new_dex_cache_roots_.clear(); |
| } |
| if ((flags & kVisitRootFlagStartLoggingNewRoots) != 0) { |
| log_new_dex_caches_roots_ = true; |
| } else if ((flags & kVisitRootFlagStopLoggingNewRoots) != 0) { |
| log_new_dex_caches_roots_ = false; |
| } |
| } |
| VisitClassRoots(callback, arg, flags); |
| array_iftable_.VisitRoot(callback, arg, 0, kRootVMInternal); |
| DCHECK(!array_iftable_.IsNull()); |
| for (size_t i = 0; i < kFindArrayCacheSize; ++i) { |
| if (!find_array_class_cache_[i].IsNull()) { |
| find_array_class_cache_[i].VisitRoot(callback, arg, 0, kRootVMInternal); |
| } |
| } |
| } |
| |
| void ClassLinker::VisitClasses(ClassVisitor* visitor, void* arg) { |
| if (dex_cache_image_class_lookup_required_) { |
| MoveImageClassesToClassTable(); |
| } |
| // TODO: why isn't this a ReaderMutexLock? |
| WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| for (std::pair<const size_t, GcRoot<mirror::Class> >& it : class_table_) { |
| mirror::Class* c = it.second.Read(); |
| if (!visitor(c, arg)) { |
| return; |
| } |
| } |
| } |
| |
| static bool GetClassesVisitorSet(mirror::Class* c, void* arg) { |
| std::set<mirror::Class*>* classes = reinterpret_cast<std::set<mirror::Class*>*>(arg); |
| classes->insert(c); |
| return true; |
| } |
| |
| struct GetClassesVisitorArrayArg { |
| Handle<mirror::ObjectArray<mirror::Class>>* classes; |
| int32_t index; |
| bool success; |
| }; |
| |
| static bool GetClassesVisitorArray(mirror::Class* c, void* varg) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| GetClassesVisitorArrayArg* arg = reinterpret_cast<GetClassesVisitorArrayArg*>(varg); |
| if (arg->index < (*arg->classes)->GetLength()) { |
| (*arg->classes)->Set(arg->index, c); |
| arg->index++; |
| return true; |
| } else { |
| arg->success = false; |
| return false; |
| } |
| } |
| |
| void ClassLinker::VisitClassesWithoutClassesLock(ClassVisitor* visitor, void* arg) { |
| // TODO: it may be possible to avoid secondary storage if we iterate over dex caches. The problem |
| // is avoiding duplicates. |
| if (!kMovingClasses) { |
| std::set<mirror::Class*> classes; |
| VisitClasses(GetClassesVisitorSet, &classes); |
| for (mirror::Class* klass : classes) { |
| if (!visitor(klass, arg)) { |
| return; |
| } |
| } |
| } else { |
| Thread* self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| MutableHandle<mirror::ObjectArray<mirror::Class>> classes = |
| hs.NewHandle<mirror::ObjectArray<mirror::Class>>(nullptr); |
| GetClassesVisitorArrayArg local_arg; |
| local_arg.classes = &classes; |
| local_arg.success = false; |
| // We size the array assuming classes won't be added to the class table during the visit. |
| // If this assumption fails we iterate again. |
| while (!local_arg.success) { |
| size_t class_table_size; |
| { |
| ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_); |
| class_table_size = class_table_.size(); |
| } |
| mirror::Class* class_type = mirror::Class::GetJavaLangClass(); |
| mirror::Class* array_of_class = FindArrayClass(self, &class_type); |
| classes.Assign( |
| mirror::ObjectArray<mirror::Class>::Alloc(self, array_of_class, class_table_size)); |
| CHECK(classes.Get() != nullptr); // OOME. |
| local_arg.index = 0; |
| local_arg.success = true; |
| VisitClasses(GetClassesVisitorArray, &local_arg); |
| } |
| for (int32_t i = 0; i < classes->GetLength(); ++i) { |
| // If the class table shrank during creation of the clases array we expect null elements. If |
| // the class table grew then the loop repeats. If classes are created after the loop has |
| // finished then we don't visit. |
| mirror::Class* klass = classes->Get(i); |
| if (klass != nullptr && !visitor(klass, arg)) { |
| return; |
| } |
| } |
| } |
| } |
| |
| ClassLinker::~ClassLinker() { |
| mirror::Class::ResetClass(); |
| mirror::String::ResetClass(); |
| mirror::Reference::ResetClass(); |
| mirror::ArtField::ResetClass(); |
| mirror::ArtMethod::ResetClass(); |
| mirror::BooleanArray::ResetArrayClass(); |
| mirror::ByteArray::ResetArrayClass(); |
| mirror::CharArray::ResetArrayClass(); |
| mirror::DoubleArray::ResetArrayClass(); |
| mirror::FloatArray::ResetArrayClass(); |
| mirror::IntArray::ResetArrayClass(); |
| mirror::LongArray::ResetArrayClass(); |
| mirror::ShortArray::ResetArrayClass(); |
| mirror::Throwable::ResetClass(); |
| mirror::StackTraceElement::ResetClass(); |
| STLDeleteElements(&boot_class_path_); |
| STLDeleteElements(&oat_files_); |
| } |
| |
| mirror::DexCache* ClassLinker::AllocDexCache(Thread* self, const DexFile& dex_file) { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| StackHandleScope<16> hs(self); |
| Handle<mirror::Class> dex_cache_class(hs.NewHandle(GetClassRoot(kJavaLangDexCache))); |
| Handle<mirror::DexCache> dex_cache( |
| hs.NewHandle(down_cast<mirror::DexCache*>( |
| heap->AllocObject<true>(self, dex_cache_class.Get(), dex_cache_class->GetObjectSize(), |
| VoidFunctor())))); |
| if (dex_cache.Get() == nullptr) { |
| return nullptr; |
| } |
| Handle<mirror::String> |
| location(hs.NewHandle(intern_table_->InternStrong(dex_file.GetLocation().c_str()))); |
| if (location.Get() == nullptr) { |
| return nullptr; |
| } |
| Handle<mirror::ObjectArray<mirror::String>> |
| strings(hs.NewHandle(AllocStringArray(self, dex_file.NumStringIds()))); |
| if (strings.Get() == nullptr) { |
| return nullptr; |
| } |
| Handle<mirror::ObjectArray<mirror::Class>> |
| types(hs.NewHandle(AllocClassArray(self, dex_file.NumTypeIds()))); |
| if (types.Get() == nullptr) { |
| return nullptr; |
| } |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> |
| methods(hs.NewHandle(AllocArtMethodArray(self, dex_file.NumMethodIds()))); |
| if (methods.Get() == nullptr) { |
| return nullptr; |
| } |
| Handle<mirror::ObjectArray<mirror::ArtField>> |
| fields(hs.NewHandle(AllocArtFieldArray(self, dex_file.NumFieldIds()))); |
| if (fields.Get() == nullptr) { |
| return nullptr; |
| } |
| dex_cache->Init(&dex_file, location.Get(), strings.Get(), types.Get(), methods.Get(), |
| fields.Get()); |
| return dex_cache.Get(); |
| } |
| |
| mirror::Class* ClassLinker::AllocClass(Thread* self, mirror::Class* java_lang_Class, |
| uint32_t class_size) { |
| DCHECK_GE(class_size, sizeof(mirror::Class)); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| mirror::Class::InitializeClassVisitor visitor(class_size); |
| mirror::Object* k = kMovingClasses ? |
| heap->AllocObject<true>(self, java_lang_Class, class_size, visitor) : |
| heap->AllocNonMovableObject<true>(self, java_lang_Class, class_size, visitor); |
| if (UNLIKELY(k == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| return k->AsClass(); |
| } |
| |
| mirror::Class* ClassLinker::AllocClass(Thread* self, uint32_t class_size) { |
| return AllocClass(self, GetClassRoot(kJavaLangClass), class_size); |
| } |
| |
| mirror::ArtField* ClassLinker::AllocArtField(Thread* self) { |
| return down_cast<mirror::ArtField*>( |
| GetClassRoot(kJavaLangReflectArtField)->AllocNonMovableObject(self)); |
| } |
| |
| mirror::ArtMethod* ClassLinker::AllocArtMethod(Thread* self) { |
| return down_cast<mirror::ArtMethod*>( |
| GetClassRoot(kJavaLangReflectArtMethod)->AllocNonMovableObject(self)); |
| } |
| |
| mirror::ObjectArray<mirror::StackTraceElement>* ClassLinker::AllocStackTraceElementArray( |
| Thread* self, size_t length) { |
| return mirror::ObjectArray<mirror::StackTraceElement>::Alloc( |
| self, GetClassRoot(kJavaLangStackTraceElementArrayClass), length); |
| } |
| |
| mirror::Class* ClassLinker::EnsureResolved(Thread* self, const char* descriptor, |
| mirror::Class* klass) { |
| DCHECK(klass != nullptr); |
| |
| // For temporary classes we must wait for them to be retired. |
| if (init_done_ && klass->IsTemp()) { |
| CHECK(!klass->IsResolved()); |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass); |
| return nullptr; |
| } |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(klass)); |
| ObjectLock<mirror::Class> lock(self, h_class); |
| // Loop and wait for the resolving thread to retire this class. |
| while (!h_class->IsRetired() && !h_class->IsErroneous()) { |
| lock.WaitIgnoringInterrupts(); |
| } |
| if (h_class->IsErroneous()) { |
| ThrowEarlierClassFailure(h_class.Get()); |
| return nullptr; |
| } |
| CHECK(h_class->IsRetired()); |
| // Get the updated class from class table. |
| klass = LookupClass(self, descriptor, h_class.Get()->GetClassLoader()); |
| } |
| |
| // Wait for the class if it has not already been linked. |
| if (!klass->IsResolved() && !klass->IsErroneous()) { |
| StackHandleScope<1> hs(self); |
| HandleWrapper<mirror::Class> h_class(hs.NewHandleWrapper(&klass)); |
| ObjectLock<mirror::Class> lock(self, h_class); |
| // Check for circular dependencies between classes. |
| if (!h_class->IsResolved() && h_class->GetClinitThreadId() == self->GetTid()) { |
| ThrowClassCircularityError(h_class.Get()); |
| h_class->SetStatus(mirror::Class::kStatusError, self); |
| return nullptr; |
| } |
| // Wait for the pending initialization to complete. |
| while (!h_class->IsResolved() && !h_class->IsErroneous()) { |
| lock.WaitIgnoringInterrupts(); |
| } |
| } |
| |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass); |
| return nullptr; |
| } |
| // Return the loaded class. No exceptions should be pending. |
| CHECK(klass->IsResolved()) << PrettyClass(klass); |
| self->AssertNoPendingException(); |
| return klass; |
| } |
| |
| typedef std::pair<const DexFile*, const DexFile::ClassDef*> ClassPathEntry; |
| |
| // Search a collection of DexFiles for a descriptor |
| ClassPathEntry FindInClassPath(const char* descriptor, |
| const std::vector<const DexFile*>& class_path) { |
| for (size_t i = 0; i != class_path.size(); ++i) { |
| const DexFile* dex_file = class_path[i]; |
| const DexFile::ClassDef* dex_class_def = dex_file->FindClassDef(descriptor); |
| if (dex_class_def != nullptr) { |
| return ClassPathEntry(dex_file, dex_class_def); |
| } |
| } |
| // TODO: remove reinterpret_cast when issue with -std=gnu++0x host issue resolved |
| return ClassPathEntry(static_cast<const DexFile*>(nullptr), |
| static_cast<const DexFile::ClassDef*>(nullptr)); |
| } |
| |
| mirror::Class* ClassLinker::FindClassInPathClassLoader(ScopedObjectAccessAlreadyRunnable& soa, |
| Thread* self, const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader) { |
| if (class_loader->GetClass() != |
| soa.Decode<mirror::Class*>(WellKnownClasses::dalvik_system_PathClassLoader) || |
| class_loader->GetParent()->GetClass() != |
| soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_BootClassLoader)) { |
| return nullptr; |
| } |
| ClassPathEntry pair = FindInClassPath(descriptor, boot_class_path_); |
| // Check if this would be found in the parent boot class loader. |
| if (pair.second != nullptr) { |
| mirror::Class* klass = LookupClass(self, descriptor, nullptr); |
| if (klass != nullptr) { |
| return EnsureResolved(self, descriptor, klass); |
| } |
| klass = DefineClass(self, descriptor, NullHandle<mirror::ClassLoader>(), *pair.first, |
| *pair.second); |
| if (klass != nullptr) { |
| return klass; |
| } |
| CHECK(self->IsExceptionPending()) << descriptor; |
| self->ClearException(); |
| } else { |
| // RegisterDexFile may allocate dex caches (and cause thread suspension). |
| StackHandleScope<3> hs(self); |
| // The class loader is a PathClassLoader which inherits from BaseDexClassLoader. |
| // We need to get the DexPathList and loop through it. |
| Handle<mirror::ArtField> cookie_field = |
| hs.NewHandle(soa.DecodeField(WellKnownClasses::dalvik_system_DexFile_cookie)); |
| Handle<mirror::ArtField> dex_file_field = |
| hs.NewHandle( |
| soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile)); |
| mirror::Object* dex_path_list = |
| soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)-> |
| GetObject(class_loader.Get()); |
| if (dex_path_list != nullptr && dex_file_field.Get() != nullptr && |
| cookie_field.Get() != nullptr) { |
| // DexPathList has an array dexElements of Elements[] which each contain a dex file. |
| mirror::Object* dex_elements_obj = |
| soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList_dexElements)-> |
| GetObject(dex_path_list); |
| // Loop through each dalvik.system.DexPathList$Element's dalvik.system.DexFile and look |
| // at the mCookie which is a DexFile vector. |
| if (dex_elements_obj != nullptr) { |
| Handle<mirror::ObjectArray<mirror::Object>> dex_elements = |
| hs.NewHandle(dex_elements_obj->AsObjectArray<mirror::Object>()); |
| for (int32_t i = 0; i < dex_elements->GetLength(); ++i) { |
| mirror::Object* element = dex_elements->GetWithoutChecks(i); |
| if (element == nullptr) { |
| // Should never happen, fall back to java code to throw a NPE. |
| break; |
| } |
| mirror::Object* dex_file = dex_file_field->GetObject(element); |
| if (dex_file != nullptr) { |
| const uint64_t cookie = cookie_field->GetLong(dex_file); |
| auto* dex_files = |
| reinterpret_cast<std::vector<const DexFile*>*>(static_cast<uintptr_t>(cookie)); |
| if (dex_files == nullptr) { |
| // This should never happen so log a warning. |
| LOG(WARNING) << "Null DexFile::mCookie for " << descriptor; |
| break; |
| } |
| for (const DexFile* dex_file : *dex_files) { |
| const DexFile::ClassDef* dex_class_def = dex_file->FindClassDef(descriptor); |
| if (dex_class_def != nullptr) { |
| RegisterDexFile(*dex_file); |
| mirror::Class* klass = |
| DefineClass(self, descriptor, class_loader, *dex_file, *dex_class_def); |
| if (klass == nullptr) { |
| CHECK(self->IsExceptionPending()) << descriptor; |
| self->ClearException(); |
| return nullptr; |
| } |
| return klass; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| mirror::Class* ClassLinker::FindClass(Thread* self, const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader) { |
| DCHECK_NE(*descriptor, '\0') << "descriptor is empty string"; |
| DCHECK(self != nullptr); |
| self->AssertNoPendingException(); |
| if (descriptor[1] == '\0') { |
| // only the descriptors of primitive types should be 1 character long, also avoid class lookup |
| // for primitive classes that aren't backed by dex files. |
| return FindPrimitiveClass(descriptor[0]); |
| } |
| // Find the class in the loaded classes table. |
| mirror::Class* klass = LookupClass(self, descriptor, class_loader.Get()); |
| if (klass != nullptr) { |
| return EnsureResolved(self, descriptor, klass); |
| } |
| // Class is not yet loaded. |
| if (descriptor[0] == '[') { |
| return CreateArrayClass(self, descriptor, class_loader); |
| } else if (class_loader.Get() == nullptr) { |
| // The boot class loader, search the boot class path. |
| ClassPathEntry pair = FindInClassPath(descriptor, boot_class_path_); |
| if (pair.second != nullptr) { |
| return DefineClass(self, descriptor, NullHandle<mirror::ClassLoader>(), *pair.first, |
| *pair.second); |
| } else { |
| // The boot class loader is searched ahead of the application class loader, failures are |
| // expected and will be wrapped in a ClassNotFoundException. Use the pre-allocated error to |
| // trigger the chaining with a proper stack trace. |
| mirror::Throwable* pre_allocated = Runtime::Current()->GetPreAllocatedNoClassDefFoundError(); |
| self->SetException(ThrowLocation(), pre_allocated); |
| return nullptr; |
| } |
| } else if (Runtime::Current()->UseCompileTimeClassPath()) { |
| // First try with the bootstrap class loader. |
| if (class_loader.Get() != nullptr) { |
| klass = LookupClass(self, descriptor, nullptr); |
| if (klass != nullptr) { |
| return EnsureResolved(self, descriptor, klass); |
| } |
| } |
| // If the lookup failed search the boot class path. We don't perform a recursive call to avoid |
| // a NoClassDefFoundError being allocated. |
| ClassPathEntry pair = FindInClassPath(descriptor, boot_class_path_); |
| if (pair.second != nullptr) { |
| return DefineClass(self, descriptor, NullHandle<mirror::ClassLoader>(), *pair.first, |
| *pair.second); |
| } |
| // Next try the compile time class path. |
| const std::vector<const DexFile*>* class_path; |
| { |
| ScopedObjectAccessUnchecked soa(self); |
| ScopedLocalRef<jobject> jclass_loader(soa.Env(), |
| soa.AddLocalReference<jobject>(class_loader.Get())); |
| class_path = &Runtime::Current()->GetCompileTimeClassPath(jclass_loader.get()); |
| } |
| pair = FindInClassPath(descriptor, *class_path); |
| if (pair.second != nullptr) { |
| return DefineClass(self, descriptor, class_loader, *pair.first, *pair.second); |
| } else { |
| // Use the pre-allocated NCDFE at compile time to avoid wasting time constructing exceptions. |
| mirror::Throwable* pre_allocated = Runtime::Current()->GetPreAllocatedNoClassDefFoundError(); |
| self->SetException(ThrowLocation(), pre_allocated); |
| return nullptr; |
| } |
| } else { |
| ScopedObjectAccessUnchecked soa(self); |
| mirror::Class* klass = FindClassInPathClassLoader(soa, self, descriptor, class_loader); |
| if (klass != nullptr) { |
| return klass; |
| } |
| ScopedLocalRef<jobject> class_loader_object(soa.Env(), |
| soa.AddLocalReference<jobject>(class_loader.Get())); |
| std::string class_name_string(DescriptorToDot(descriptor)); |
| ScopedLocalRef<jobject> result(soa.Env(), nullptr); |
| { |
| ScopedThreadStateChange tsc(self, kNative); |
| ScopedLocalRef<jobject> class_name_object(soa.Env(), |
| soa.Env()->NewStringUTF(class_name_string.c_str())); |
| if (class_name_object.get() == nullptr) { |
| DCHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| CHECK(class_loader_object.get() != nullptr); |
| result.reset(soa.Env()->CallObjectMethod(class_loader_object.get(), |
| WellKnownClasses::java_lang_ClassLoader_loadClass, |
| class_name_object.get())); |
| } |
| if (self->IsExceptionPending()) { |
| // If the ClassLoader threw, pass that exception up. |
| return nullptr; |
| } else if (result.get() == nullptr) { |
| // broken loader - throw NPE to be compatible with Dalvik |
| ThrowNullPointerException(nullptr, StringPrintf("ClassLoader.loadClass returned null for %s", |
| class_name_string.c_str()).c_str()); |
| return nullptr; |
| } else { |
| // success, return mirror::Class* |
| return soa.Decode<mirror::Class*>(result.get()); |
| } |
| } |
| UNREACHABLE(); |
| } |
| |
| mirror::Class* ClassLinker::DefineClass(Thread* self, const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def) { |
| StackHandleScope<3> hs(self); |
| auto klass = hs.NewHandle<mirror::Class>(nullptr); |
| bool should_allocate = false; |
| |
| // Load the class from the dex file. |
| if (UNLIKELY(!init_done_)) { |
| // finish up init of hand crafted class_roots_ |
| if (strcmp(descriptor, "Ljava/lang/Object;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangObject)); |
| } else if (strcmp(descriptor, "Ljava/lang/Class;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangClass)); |
| } else if (strcmp(descriptor, "Ljava/lang/String;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangString)); |
| } else if (strcmp(descriptor, "Ljava/lang/ref/Reference;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangRefReference)); |
| } else if (strcmp(descriptor, "Ljava/lang/DexCache;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangDexCache)); |
| } else if (strcmp(descriptor, "Ljava/lang/reflect/ArtField;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangReflectArtField)); |
| } else if (strcmp(descriptor, "Ljava/lang/reflect/ArtMethod;") == 0) { |
| klass.Assign(GetClassRoot(kJavaLangReflectArtMethod)); |
| } else { |
| should_allocate = true; |
| } |
| } else { |
| should_allocate = true; |
| } |
| |
| if (should_allocate) { |
| // Allocate a class with the status of not ready. |
| // Interface object should get the right size here. Regular class will |
| // figure out the right size later and be replaced with one of the right |
| // size when the class becomes resolved. |
| klass.Assign(AllocClass(self, SizeOfClassWithoutEmbeddedTables(dex_file, dex_class_def))); |
| } |
| if (UNLIKELY(klass.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // Expect an OOME. |
| return nullptr; |
| } |
| klass->SetDexCache(FindDexCache(dex_file)); |
| LoadClass(self, dex_file, dex_class_def, klass, class_loader.Get()); |
| ObjectLock<mirror::Class> lock(self, klass); |
| if (self->IsExceptionPending()) { |
| // An exception occured during load, set status to erroneous while holding klass' lock in case |
| // notification is necessary. |
| if (!klass->IsErroneous()) { |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| } |
| return nullptr; |
| } |
| klass->SetClinitThreadId(self->GetTid()); |
| |
| // Add the newly loaded class to the loaded classes table. |
| mirror::Class* existing = InsertClass(descriptor, klass.Get(), Hash(descriptor)); |
| if (existing != nullptr) { |
| // We failed to insert because we raced with another thread. Calling EnsureResolved may cause |
| // this thread to block. |
| return EnsureResolved(self, descriptor, existing); |
| } |
| |
| // Finish loading (if necessary) by finding parents |
| CHECK(!klass->IsLoaded()); |
| if (!LoadSuperAndInterfaces(klass, dex_file)) { |
| // Loading failed. |
| if (!klass->IsErroneous()) { |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| } |
| return nullptr; |
| } |
| CHECK(klass->IsLoaded()); |
| // Link the class (if necessary) |
| CHECK(!klass->IsResolved()); |
| // TODO: Use fast jobjects? |
| auto interfaces = hs.NewHandle<mirror::ObjectArray<mirror::Class>>(nullptr); |
| |
| mirror::Class* new_class = nullptr; |
| if (!LinkClass(self, descriptor, klass, interfaces, &new_class)) { |
| // Linking failed. |
| if (!klass->IsErroneous()) { |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| } |
| return nullptr; |
| } |
| self->AssertNoPendingException(); |
| CHECK(new_class != nullptr) << descriptor; |
| CHECK(new_class->IsResolved()) << descriptor; |
| |
| Handle<mirror::Class> new_class_h(hs.NewHandle(new_class)); |
| |
| /* |
| * We send CLASS_PREPARE events to the debugger from here. The |
| * definition of "preparation" is creating the static fields for a |
| * class and initializing them to the standard default values, but not |
| * executing any code (that comes later, during "initialization"). |
| * |
| * We did the static preparation in LinkClass. |
| * |
| * The class has been prepared and resolved but possibly not yet verified |
| * at this point. |
| */ |
| Dbg::PostClassPrepare(new_class_h.Get()); |
| |
| return new_class_h.Get(); |
| } |
| |
| uint32_t ClassLinker::SizeOfClassWithoutEmbeddedTables(const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def) { |
| const byte* class_data = dex_file.GetClassData(dex_class_def); |
| size_t num_ref = 0; |
| size_t num_8 = 0; |
| size_t num_16 = 0; |
| size_t num_32 = 0; |
| size_t num_64 = 0; |
| if (class_data != nullptr) { |
| for (ClassDataItemIterator it(dex_file, class_data); it.HasNextStaticField(); it.Next()) { |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(it.GetMemberIndex()); |
| const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id); |
| char c = descriptor[0]; |
| switch (c) { |
| case 'L': |
| case '[': |
| num_ref++; |
| break; |
| case 'J': |
| case 'D': |
| num_64++; |
| break; |
| case 'I': |
| case 'F': |
| num_32++; |
| break; |
| case 'S': |
| case 'C': |
| num_16++; |
| break; |
| case 'B': |
| case 'Z': |
| num_8++; |
| break; |
| default: |
| LOG(FATAL) << "Unknown descriptor: " << c; |
| } |
| } |
| } |
| return mirror::Class::ComputeClassSize(false, 0, num_8, num_16, num_32, num_64, num_ref); |
| } |
| |
| OatFile::OatClass ClassLinker::FindOatClass(const DexFile& dex_file, uint16_t class_def_idx, |
| bool* found) { |
| DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16); |
| const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFileForDexFile(dex_file); |
| if (oat_dex_file == nullptr) { |
| *found = false; |
| return OatFile::OatClass::Invalid(); |
| } |
| *found = true; |
| return oat_dex_file->GetOatClass(class_def_idx); |
| } |
| |
| static uint32_t GetOatMethodIndexFromMethodIndex(const DexFile& dex_file, uint16_t class_def_idx, |
| uint32_t method_idx) { |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_idx); |
| const byte* class_data = dex_file.GetClassData(class_def); |
| CHECK(class_data != nullptr); |
| ClassDataItemIterator it(dex_file, class_data); |
| // Skip fields |
| while (it.HasNextStaticField()) { |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| it.Next(); |
| } |
| // Process methods |
| size_t class_def_method_index = 0; |
| while (it.HasNextDirectMethod()) { |
| if (it.GetMemberIndex() == method_idx) { |
| return class_def_method_index; |
| } |
| class_def_method_index++; |
| it.Next(); |
| } |
| while (it.HasNextVirtualMethod()) { |
| if (it.GetMemberIndex() == method_idx) { |
| return class_def_method_index; |
| } |
| class_def_method_index++; |
| it.Next(); |
| } |
| DCHECK(!it.HasNext()); |
| LOG(FATAL) << "Failed to find method index " << method_idx << " in " << dex_file.GetLocation(); |
| return 0; |
| } |
| |
| const OatFile::OatMethod ClassLinker::FindOatMethodFor(mirror::ArtMethod* method, bool* found) { |
| // Although we overwrite the trampoline of non-static methods, we may get here via the resolution |
| // method for direct methods (or virtual methods made direct). |
| mirror::Class* declaring_class = method->GetDeclaringClass(); |
| size_t oat_method_index; |
| if (method->IsStatic() || method->IsDirect()) { |
| // Simple case where the oat method index was stashed at load time. |
| oat_method_index = method->GetMethodIndex(); |
| } else { |
| // We're invoking a virtual method directly (thanks to sharpening), compute the oat_method_index |
| // by search for its position in the declared virtual methods. |
| oat_method_index = declaring_class->NumDirectMethods(); |
| size_t end = declaring_class->NumVirtualMethods(); |
| bool found = false; |
| for (size_t i = 0; i < end; i++) { |
| // Check method index instead of identity in case of duplicate method definitions. |
| if (method->GetDexMethodIndex() == |
| declaring_class->GetVirtualMethod(i)->GetDexMethodIndex()) { |
| found = true; |
| break; |
| } |
| oat_method_index++; |
| } |
| CHECK(found) << "Didn't find oat method index for virtual method: " << PrettyMethod(method); |
| } |
| DCHECK_EQ(oat_method_index, |
| GetOatMethodIndexFromMethodIndex(*declaring_class->GetDexCache()->GetDexFile(), |
| method->GetDeclaringClass()->GetDexClassDefIndex(), |
| method->GetDexMethodIndex())); |
| OatFile::OatClass oat_class = FindOatClass(*declaring_class->GetDexCache()->GetDexFile(), |
| declaring_class->GetDexClassDefIndex(), |
| found); |
| if (!found) { |
| return OatFile::OatMethod::Invalid(); |
| } |
| *found = true; |
| return oat_class.GetOatMethod(oat_method_index); |
| } |
| |
| // Special case to get oat code without overwriting a trampoline. |
| const void* ClassLinker::GetQuickOatCodeFor(mirror::ArtMethod* method) { |
| CHECK(!method->IsAbstract()) << PrettyMethod(method); |
| if (method->IsProxyMethod()) { |
| return GetQuickProxyInvokeHandler(); |
| } |
| bool found; |
| OatFile::OatMethod oat_method = FindOatMethodFor(method, &found); |
| const void* result = nullptr; |
| if (found) { |
| result = oat_method.GetQuickCode(); |
| } |
| |
| if (result == nullptr) { |
| if (method->IsNative()) { |
| // No code and native? Use generic trampoline. |
| result = GetQuickGenericJniTrampoline(); |
| } else if (method->IsPortableCompiled()) { |
| // No code? Do we expect portable code? |
| result = GetQuickToPortableBridge(); |
| } else { |
| // No code? You must mean to go into the interpreter. |
| result = GetQuickToInterpreterBridge(); |
| } |
| } |
| return result; |
| } |
| |
| const void* ClassLinker::GetPortableOatCodeFor(mirror::ArtMethod* method, |
| bool* have_portable_code) { |
| CHECK(!method->IsAbstract()) << PrettyMethod(method); |
| *have_portable_code = false; |
| if (method->IsProxyMethod()) { |
| return GetPortableProxyInvokeHandler(); |
| } |
| bool found; |
| OatFile::OatMethod oat_method = FindOatMethodFor(method, &found); |
| const void* result = nullptr; |
| const void* quick_code = nullptr; |
| if (found) { |
| result = oat_method.GetPortableCode(); |
| quick_code = oat_method.GetQuickCode(); |
| } |
| |
| if (result == nullptr) { |
| if (quick_code == nullptr) { |
| // No code? You must mean to go into the interpreter. |
| result = GetPortableToInterpreterBridge(); |
| } else { |
| // No code? But there's quick code, so use a bridge. |
| result = GetPortableToQuickBridge(); |
| } |
| } else { |
| *have_portable_code = true; |
| } |
| return result; |
| } |
| |
| const void* ClassLinker::GetOatMethodQuickCodeFor(mirror::ArtMethod* method) { |
| if (method->IsNative() || method->IsAbstract() || method->IsProxyMethod()) { |
| return nullptr; |
| } |
| bool found; |
| OatFile::OatMethod oat_method = FindOatMethodFor(method, &found); |
| return found ? oat_method.GetQuickCode() : nullptr; |
| } |
| |
| const void* ClassLinker::GetOatMethodPortableCodeFor(mirror::ArtMethod* method) { |
| if (method->IsNative() || method->IsAbstract() || method->IsProxyMethod()) { |
| return nullptr; |
| } |
| bool found; |
| OatFile::OatMethod oat_method = FindOatMethodFor(method, &found); |
| return found ? oat_method.GetPortableCode() : nullptr; |
| } |
| |
| const void* ClassLinker::GetQuickOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, |
| uint32_t method_idx) { |
| bool found; |
| OatFile::OatClass oat_class = FindOatClass(dex_file, class_def_idx, &found); |
| if (!found) { |
| return nullptr; |
| } |
| uint32_t oat_method_idx = GetOatMethodIndexFromMethodIndex(dex_file, class_def_idx, method_idx); |
| return oat_class.GetOatMethod(oat_method_idx).GetQuickCode(); |
| } |
| |
| const void* ClassLinker::GetPortableOatCodeFor(const DexFile& dex_file, uint16_t class_def_idx, |
| uint32_t method_idx) { |
| bool found; |
| OatFile::OatClass oat_class = FindOatClass(dex_file, class_def_idx, &found); |
| if (!found) { |
| return nullptr; |
| } |
| uint32_t oat_method_idx = GetOatMethodIndexFromMethodIndex(dex_file, class_def_idx, method_idx); |
| return oat_class.GetOatMethod(oat_method_idx).GetPortableCode(); |
| } |
| |
| // Returns true if the method must run with interpreter, false otherwise. |
| static bool NeedsInterpreter( |
| mirror::ArtMethod* method, const void* quick_code, const void* portable_code) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if ((quick_code == nullptr) && (portable_code == nullptr)) { |
| // No code: need interpreter. |
| // May return true for native code, in the case of generic JNI |
| // DCHECK(!method->IsNative()); |
| return true; |
| } |
| #ifdef ART_SEA_IR_MODE |
| ScopedObjectAccess soa(Thread::Current()); |
| if (std::string::npos != PrettyMethod(method).find("fibonacci")) { |
| LOG(INFO) << "Found " << PrettyMethod(method); |
| return false; |
| } |
| #endif |
| // If interpreter mode is enabled, every method (except native and proxy) must |
| // be run with interpreter. |
| return Runtime::Current()->GetInstrumentation()->InterpretOnly() && |
| !method->IsNative() && !method->IsProxyMethod(); |
| } |
| |
| void ClassLinker::FixupStaticTrampolines(mirror::Class* klass) { |
| DCHECK(klass->IsInitialized()) << PrettyDescriptor(klass); |
| if (klass->NumDirectMethods() == 0) { |
| return; // No direct methods => no static methods. |
| } |
| Runtime* runtime = Runtime::Current(); |
| if (!runtime->IsStarted() || runtime->UseCompileTimeClassPath()) { |
| if (runtime->IsCompiler() || runtime->GetHeap()->HasImageSpace()) { |
| return; // OAT file unavailable. |
| } |
| } |
| |
| const DexFile& dex_file = klass->GetDexFile(); |
| const DexFile::ClassDef* dex_class_def = klass->GetClassDef(); |
| CHECK(dex_class_def != nullptr); |
| const byte* class_data = dex_file.GetClassData(*dex_class_def); |
| // There should always be class data if there were direct methods. |
| CHECK(class_data != nullptr) << PrettyDescriptor(klass); |
| ClassDataItemIterator it(dex_file, class_data); |
| // Skip fields |
| while (it.HasNextStaticField()) { |
| it.Next(); |
| } |
| while (it.HasNextInstanceField()) { |
| it.Next(); |
| } |
| bool has_oat_class; |
| OatFile::OatClass oat_class = FindOatClass(dex_file, klass->GetDexClassDefIndex(), |
| &has_oat_class); |
| // Link the code of methods skipped by LinkCode. |
| for (size_t method_index = 0; it.HasNextDirectMethod(); ++method_index, it.Next()) { |
| mirror::ArtMethod* method = klass->GetDirectMethod(method_index); |
| if (!method->IsStatic()) { |
| // Only update static methods. |
| continue; |
| } |
| const void* portable_code = nullptr; |
| const void* quick_code = nullptr; |
| if (has_oat_class) { |
| OatFile::OatMethod oat_method = oat_class.GetOatMethod(method_index); |
| portable_code = oat_method.GetPortableCode(); |
| quick_code = oat_method.GetQuickCode(); |
| } |
| const bool enter_interpreter = NeedsInterpreter(method, quick_code, portable_code); |
| bool have_portable_code = false; |
| if (enter_interpreter) { |
| // Use interpreter entry point. |
| // Check whether the method is native, in which case it's generic JNI. |
| if (quick_code == nullptr && portable_code == nullptr && method->IsNative()) { |
| quick_code = GetQuickGenericJniTrampoline(); |
| portable_code = GetPortableToQuickBridge(); |
| } else { |
| portable_code = GetPortableToInterpreterBridge(); |
| quick_code = GetQuickToInterpreterBridge(); |
| } |
| } else { |
| if (portable_code == nullptr) { |
| portable_code = GetPortableToQuickBridge(); |
| } else { |
| have_portable_code = true; |
| } |
| if (quick_code == nullptr) { |
| quick_code = GetQuickToPortableBridge(); |
| } |
| } |
| runtime->GetInstrumentation()->UpdateMethodsCode(method, quick_code, portable_code, |
| have_portable_code); |
| } |
| // Ignore virtual methods on the iterator. |
| } |
| |
| void ClassLinker::LinkCode(Handle<mirror::ArtMethod> method, |
| const OatFile::OatClass* oat_class, |
| const DexFile& dex_file, uint32_t dex_method_index, |
| uint32_t method_index) { |
| if (Runtime::Current()->IsCompiler()) { |
| // The following code only applies to a non-compiler runtime. |
| return; |
| } |
| // Method shouldn't have already been linked. |
| DCHECK(method->GetEntryPointFromQuickCompiledCode() == nullptr); |
| DCHECK(method->GetEntryPointFromPortableCompiledCode() == nullptr); |
| if (oat_class != nullptr) { |
| // Every kind of method should at least get an invoke stub from the oat_method. |
| // non-abstract methods also get their code pointers. |
| const OatFile::OatMethod oat_method = oat_class->GetOatMethod(method_index); |
| oat_method.LinkMethod(method.Get()); |
| } |
| |
| // Install entry point from interpreter. |
| bool enter_interpreter = NeedsInterpreter(method.Get(), |
| method->GetEntryPointFromQuickCompiledCode(), |
| method->GetEntryPointFromPortableCompiledCode()); |
| if (enter_interpreter && !method->IsNative()) { |
| method->SetEntryPointFromInterpreter(interpreter::artInterpreterToInterpreterBridge); |
| } else { |
| method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge); |
| } |
| |
| if (method->IsAbstract()) { |
| method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableToInterpreterBridge()); |
| return; |
| } |
| |
| bool have_portable_code = false; |
| if (method->IsStatic() && !method->IsConstructor()) { |
| // For static methods excluding the class initializer, install the trampoline. |
| // It will be replaced by the proper entry point by ClassLinker::FixupStaticTrampolines |
| // after initializing class (see ClassLinker::InitializeClass method). |
| method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionTrampoline()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableResolutionTrampoline()); |
| } else if (enter_interpreter) { |
| if (!method->IsNative()) { |
| // Set entry point from compiled code if there's no code or in interpreter only mode. |
| method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableToInterpreterBridge()); |
| } else { |
| method->SetEntryPointFromQuickCompiledCode(GetQuickGenericJniTrampoline()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableToQuickBridge()); |
| } |
| } else if (method->GetEntryPointFromPortableCompiledCode() != nullptr) { |
| DCHECK(method->GetEntryPointFromQuickCompiledCode() == nullptr); |
| have_portable_code = true; |
| method->SetEntryPointFromQuickCompiledCode(GetQuickToPortableBridge()); |
| } else { |
| DCHECK(method->GetEntryPointFromQuickCompiledCode() != nullptr); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableToQuickBridge()); |
| } |
| |
| if (method->IsNative()) { |
| // Unregistering restores the dlsym lookup stub. |
| method->UnregisterNative(Thread::Current()); |
| |
| if (enter_interpreter) { |
| // We have a native method here without code. Then it should have either the GenericJni |
| // trampoline as entrypoint (non-static), or the Resolution trampoline (static). |
| DCHECK(method->GetEntryPointFromQuickCompiledCode() == GetQuickResolutionTrampoline() |
| || method->GetEntryPointFromQuickCompiledCode() == GetQuickGenericJniTrampoline()); |
| } |
| } |
| |
| // Allow instrumentation its chance to hijack code. |
| Runtime* runtime = Runtime::Current(); |
| runtime->GetInstrumentation()->UpdateMethodsCode(method.Get(), |
| method->GetEntryPointFromQuickCompiledCode(), |
| method->GetEntryPointFromPortableCompiledCode(), |
| have_portable_code); |
| } |
| |
| |
| |
| void ClassLinker::LoadClass(Thread* self, const DexFile& dex_file, |
| const DexFile::ClassDef& dex_class_def, |
| Handle<mirror::Class> klass, |
| mirror::ClassLoader* class_loader) { |
| CHECK(klass.Get() != nullptr); |
| CHECK(klass->GetDexCache() != nullptr); |
| CHECK_EQ(mirror::Class::kStatusNotReady, klass->GetStatus()); |
| const char* descriptor = dex_file.GetClassDescriptor(dex_class_def); |
| CHECK(descriptor != nullptr); |
| |
| klass->SetClass(GetClassRoot(kJavaLangClass)); |
| if (kUseBakerOrBrooksReadBarrier) { |
| klass->AssertReadBarrierPointer(); |
| } |
| uint32_t access_flags = dex_class_def.GetJavaAccessFlags(); |
| CHECK_EQ(access_flags & ~kAccJavaFlagsMask, 0U); |
| klass->SetAccessFlags(access_flags); |
| klass->SetClassLoader(class_loader); |
| DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot); |
| klass->SetStatus(mirror::Class::kStatusIdx, nullptr); |
| |
| klass->SetDexClassDefIndex(dex_file.GetIndexForClassDef(dex_class_def)); |
| klass->SetDexTypeIndex(dex_class_def.class_idx_); |
| |
| const byte* class_data = dex_file.GetClassData(dex_class_def); |
| if (class_data == nullptr) { |
| return; // no fields or methods - for example a marker interface |
| } |
| |
| |
| bool has_oat_class = false; |
| if (Runtime::Current()->IsStarted() && !Runtime::Current()->UseCompileTimeClassPath()) { |
| OatFile::OatClass oat_class = FindOatClass(dex_file, klass->GetDexClassDefIndex(), |
| &has_oat_class); |
| if (has_oat_class) { |
| LoadClassMembers(self, dex_file, class_data, klass, class_loader, &oat_class); |
| } |
| } |
| if (!has_oat_class) { |
| LoadClassMembers(self, dex_file, class_data, klass, class_loader, nullptr); |
| } |
| } |
| |
| void ClassLinker::LoadClassMembers(Thread* self, const DexFile& dex_file, |
| const byte* class_data, |
| Handle<mirror::Class> klass, |
| mirror::ClassLoader* class_loader, |
| const OatFile::OatClass* oat_class) { |
| // Load fields. |
| ClassDataItemIterator it(dex_file, class_data); |
| if (it.NumStaticFields() != 0) { |
| mirror::ObjectArray<mirror::ArtField>* statics = AllocArtFieldArray(self, it.NumStaticFields()); |
| if (UNLIKELY(statics == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetSFields(statics); |
| } |
| if (it.NumInstanceFields() != 0) { |
| mirror::ObjectArray<mirror::ArtField>* fields = |
| AllocArtFieldArray(self, it.NumInstanceFields()); |
| if (UNLIKELY(fields == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetIFields(fields); |
| } |
| for (size_t i = 0; it.HasNextStaticField(); i++, it.Next()) { |
| self->AllowThreadSuspension(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ArtField> sfield(hs.NewHandle(AllocArtField(self))); |
| if (UNLIKELY(sfield.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetStaticField(i, sfield.Get()); |
| LoadField(dex_file, it, klass, sfield); |
| } |
| for (size_t i = 0; it.HasNextInstanceField(); i++, it.Next()) { |
| self->AllowThreadSuspension(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ArtField> ifield(hs.NewHandle(AllocArtField(self))); |
| if (UNLIKELY(ifield.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetInstanceField(i, ifield.Get()); |
| LoadField(dex_file, it, klass, ifield); |
| } |
| |
| // Load methods. |
| if (it.NumDirectMethods() != 0) { |
| // TODO: append direct methods to class object |
| mirror::ObjectArray<mirror::ArtMethod>* directs = |
| AllocArtMethodArray(self, it.NumDirectMethods()); |
| if (UNLIKELY(directs == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetDirectMethods(directs); |
| } |
| if (it.NumVirtualMethods() != 0) { |
| // TODO: append direct methods to class object |
| mirror::ObjectArray<mirror::ArtMethod>* virtuals = |
| AllocArtMethodArray(self, it.NumVirtualMethods()); |
| if (UNLIKELY(virtuals == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetVirtualMethods(virtuals); |
| } |
| size_t class_def_method_index = 0; |
| uint32_t last_dex_method_index = DexFile::kDexNoIndex; |
| size_t last_class_def_method_index = 0; |
| for (size_t i = 0; it.HasNextDirectMethod(); i++, it.Next()) { |
| self->AllowThreadSuspension(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ArtMethod> method(hs.NewHandle(LoadMethod(self, dex_file, it, klass))); |
| if (UNLIKELY(method.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetDirectMethod(i, method.Get()); |
| LinkCode(method, oat_class, dex_file, it.GetMemberIndex(), class_def_method_index); |
| uint32_t it_method_index = it.GetMemberIndex(); |
| if (last_dex_method_index == it_method_index) { |
| // duplicate case |
| method->SetMethodIndex(last_class_def_method_index); |
| } else { |
| method->SetMethodIndex(class_def_method_index); |
| last_dex_method_index = it_method_index; |
| last_class_def_method_index = class_def_method_index; |
| } |
| class_def_method_index++; |
| } |
| for (size_t i = 0; it.HasNextVirtualMethod(); i++, it.Next()) { |
| self->AllowThreadSuspension(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ArtMethod> method(hs.NewHandle(LoadMethod(self, dex_file, it, klass))); |
| if (UNLIKELY(method.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return; |
| } |
| klass->SetVirtualMethod(i, method.Get()); |
| DCHECK_EQ(class_def_method_index, it.NumDirectMethods() + i); |
| LinkCode(method, oat_class, dex_file, it.GetMemberIndex(), class_def_method_index); |
| class_def_method_index++; |
| } |
| DCHECK(!it.HasNext()); |
| } |
| |
| void ClassLinker::LoadField(const DexFile& /*dex_file*/, const ClassDataItemIterator& it, |
| Handle<mirror::Class> klass, |
| Handle<mirror::ArtField> dst) { |
| uint32_t field_idx = it.GetMemberIndex(); |
| dst->SetDexFieldIndex(field_idx); |
| dst->SetDeclaringClass(klass.Get()); |
| dst->SetAccessFlags(it.GetFieldAccessFlags()); |
| } |
| |
| mirror::ArtMethod* ClassLinker::LoadMethod(Thread* self, const DexFile& dex_file, |
| const ClassDataItemIterator& it, |
| Handle<mirror::Class> klass) { |
| uint32_t dex_method_idx = it.GetMemberIndex(); |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx); |
| const char* method_name = dex_file.StringDataByIdx(method_id.name_idx_); |
| |
| mirror::ArtMethod* dst = AllocArtMethod(self); |
| if (UNLIKELY(dst == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| DCHECK(dst->IsArtMethod()) << PrettyDescriptor(dst->GetClass()); |
| |
| ScopedAssertNoThreadSuspension ants(self, "LoadMethod"); |
| dst->SetDexMethodIndex(dex_method_idx); |
| dst->SetDeclaringClass(klass.Get()); |
| dst->SetCodeItemOffset(it.GetMethodCodeItemOffset()); |
| |
| dst->SetDexCacheStrings(klass->GetDexCache()->GetStrings()); |
| dst->SetDexCacheResolvedMethods(klass->GetDexCache()->GetResolvedMethods()); |
| dst->SetDexCacheResolvedTypes(klass->GetDexCache()->GetResolvedTypes()); |
| |
| uint32_t access_flags = it.GetMethodAccessFlags(); |
| |
| if (UNLIKELY(strcmp("finalize", method_name) == 0)) { |
| // Set finalizable flag on declaring class. |
| if (strcmp("V", dex_file.GetShorty(method_id.proto_idx_)) == 0) { |
| // Void return type. |
| if (klass->GetClassLoader() != nullptr) { // All non-boot finalizer methods are flagged. |
| klass->SetFinalizable(); |
| } else { |
| std::string temp; |
| const char* klass_descriptor = klass->GetDescriptor(&temp); |
| // The Enum class declares a "final" finalize() method to prevent subclasses from |
| // introducing a finalizer. We don't want to set the finalizable flag for Enum or its |
| // subclasses, so we exclude it here. |
| // We also want to avoid setting the flag on Object, where we know that finalize() is |
| // empty. |
| if (strcmp(klass_descriptor, "Ljava/lang/Object;") != 0 && |
| strcmp(klass_descriptor, "Ljava/lang/Enum;") != 0) { |
| klass->SetFinalizable(); |
| } |
| } |
| } |
| } else if (method_name[0] == '<') { |
| // Fix broken access flags for initializers. Bug 11157540. |
| bool is_init = (strcmp("<init>", method_name) == 0); |
| bool is_clinit = !is_init && (strcmp("<clinit>", method_name) == 0); |
| if (UNLIKELY(!is_init && !is_clinit)) { |
| LOG(WARNING) << "Unexpected '<' at start of method name " << method_name; |
| } else { |
| if (UNLIKELY((access_flags & kAccConstructor) == 0)) { |
| LOG(WARNING) << method_name << " didn't have expected constructor access flag in class " |
| << PrettyDescriptor(klass.Get()) << " in dex file " << dex_file.GetLocation(); |
| access_flags |= kAccConstructor; |
| } |
| } |
| } |
| dst->SetAccessFlags(access_flags); |
| |
| return dst; |
| } |
| |
| void ClassLinker::AppendToBootClassPath(Thread* self, const DexFile& dex_file) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(AllocDexCache(self, dex_file))); |
| CHECK(dex_cache.Get() != nullptr) << "Failed to allocate dex cache for " |
| << dex_file.GetLocation(); |
| AppendToBootClassPath(dex_file, dex_cache); |
| } |
| |
| void ClassLinker::AppendToBootClassPath(const DexFile& dex_file, |
| Handle<mirror::DexCache> dex_cache) { |
| CHECK(dex_cache.Get() != nullptr) << dex_file.GetLocation(); |
| boot_class_path_.push_back(&dex_file); |
| RegisterDexFile(dex_file, dex_cache); |
| } |
| |
| bool ClassLinker::IsDexFileRegisteredLocked(const DexFile& dex_file) { |
| dex_lock_.AssertSharedHeld(Thread::Current()); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* dex_cache = GetDexCache(i); |
| if (dex_cache->GetDexFile() == &dex_file) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool ClassLinker::IsDexFileRegistered(const DexFile& dex_file) { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| return IsDexFileRegisteredLocked(dex_file); |
| } |
| |
| void ClassLinker::RegisterDexFileLocked(const DexFile& dex_file, |
| Handle<mirror::DexCache> dex_cache) { |
| dex_lock_.AssertExclusiveHeld(Thread::Current()); |
| CHECK(dex_cache.Get() != nullptr) << dex_file.GetLocation(); |
| CHECK(dex_cache->GetLocation()->Equals(dex_file.GetLocation())) |
| << dex_cache->GetLocation()->ToModifiedUtf8() << " " << dex_file.GetLocation(); |
| dex_caches_.push_back(GcRoot<mirror::DexCache>(dex_cache.Get())); |
| dex_cache->SetDexFile(&dex_file); |
| if (log_new_dex_caches_roots_) { |
| // TODO: This is not safe if we can remove dex caches. |
| new_dex_cache_roots_.push_back(dex_caches_.size() - 1); |
| } |
| } |
| |
| void ClassLinker::RegisterDexFile(const DexFile& dex_file) { |
| Thread* self = Thread::Current(); |
| { |
| ReaderMutexLock mu(self, dex_lock_); |
| if (IsDexFileRegisteredLocked(dex_file)) { |
| return; |
| } |
| } |
| // Don't alloc while holding the lock, since allocation may need to |
| // suspend all threads and another thread may need the dex_lock_ to |
| // get to a suspend point. |
| StackHandleScope<1> hs(self); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(AllocDexCache(self, dex_file))); |
| CHECK(dex_cache.Get() != nullptr) << "Failed to allocate dex cache for " |
| << dex_file.GetLocation(); |
| { |
| WriterMutexLock mu(self, dex_lock_); |
| if (IsDexFileRegisteredLocked(dex_file)) { |
| return; |
| } |
| RegisterDexFileLocked(dex_file, dex_cache); |
| } |
| } |
| |
| void ClassLinker::RegisterDexFile(const DexFile& dex_file, |
| Handle<mirror::DexCache> dex_cache) { |
| WriterMutexLock mu(Thread::Current(), dex_lock_); |
| RegisterDexFileLocked(dex_file, dex_cache); |
| } |
| |
| mirror::DexCache* ClassLinker::FindDexCache(const DexFile& dex_file) { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| // Search assuming unique-ness of dex file. |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* dex_cache = GetDexCache(i); |
| if (dex_cache->GetDexFile() == &dex_file) { |
| return dex_cache; |
| } |
| } |
| // Search matching by location name. |
| std::string location(dex_file.GetLocation()); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* dex_cache = GetDexCache(i); |
| if (dex_cache->GetDexFile()->GetLocation() == location) { |
| return dex_cache; |
| } |
| } |
| // Failure, dump diagnostic and abort. |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* dex_cache = GetDexCache(i); |
| LOG(ERROR) << "Registered dex file " << i << " = " << dex_cache->GetDexFile()->GetLocation(); |
| } |
| LOG(FATAL) << "Failed to find DexCache for DexFile " << location; |
| return nullptr; |
| } |
| |
| void ClassLinker::FixupDexCaches(mirror::ArtMethod* resolution_method) { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* dex_cache = GetDexCache(i); |
| dex_cache->Fixup(resolution_method); |
| } |
| } |
| |
| mirror::Class* ClassLinker::CreatePrimitiveClass(Thread* self, Primitive::Type type) { |
| mirror::Class* klass = AllocClass(self, mirror::Class::PrimitiveClassSize()); |
| if (UNLIKELY(klass == nullptr)) { |
| return nullptr; |
| } |
| return InitializePrimitiveClass(klass, type); |
| } |
| |
| mirror::Class* ClassLinker::InitializePrimitiveClass(mirror::Class* primitive_class, |
| Primitive::Type type) { |
| CHECK(primitive_class != nullptr); |
| // Must hold lock on object when initializing. |
| Thread* self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(primitive_class)); |
| ObjectLock<mirror::Class> lock(self, h_class); |
| primitive_class->SetAccessFlags(kAccPublic | kAccFinal | kAccAbstract); |
| primitive_class->SetPrimitiveType(type); |
| primitive_class->SetStatus(mirror::Class::kStatusInitialized, self); |
| const char* descriptor = Primitive::Descriptor(type); |
| mirror::Class* existing = InsertClass(descriptor, primitive_class, Hash(descriptor)); |
| CHECK(existing == nullptr) << "InitPrimitiveClass(" << type << ") failed"; |
| return primitive_class; |
| } |
| |
| // Create an array class (i.e. the class object for the array, not the |
| // array itself). "descriptor" looks like "[C" or "[[[[B" or |
| // "[Ljava/lang/String;". |
| // |
| // If "descriptor" refers to an array of primitives, look up the |
| // primitive type's internally-generated class object. |
| // |
| // "class_loader" is the class loader of the class that's referring to |
| // us. It's used to ensure that we're looking for the element type in |
| // the right context. It does NOT become the class loader for the |
| // array class; that always comes from the base element class. |
| // |
| // Returns nullptr with an exception raised on failure. |
| mirror::Class* ClassLinker::CreateArrayClass(Thread* self, const char* descriptor, |
| Handle<mirror::ClassLoader> class_loader) { |
| // Identify the underlying component type |
| CHECK_EQ('[', descriptor[0]); |
| StackHandleScope<2> hs(self); |
| MutableHandle<mirror::Class> component_type(hs.NewHandle(FindClass(self, descriptor + 1, |
| class_loader))); |
| if (component_type.Get() == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| // We need to accept erroneous classes as component types. |
| component_type.Assign(LookupClass(self, descriptor + 1, class_loader.Get())); |
| if (component_type.Get() == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; |
| } else { |
| self->ClearException(); |
| } |
| } |
| if (UNLIKELY(component_type->IsPrimitiveVoid())) { |
| ThrowNoClassDefFoundError("Attempt to create array of void primitive type"); |
| return nullptr; |
| } |
| // See if the component type is already loaded. Array classes are |
| // always associated with the class loader of their underlying |
| // element type -- an array of Strings goes with the loader for |
| // java/lang/String -- so we need to look for it there. (The |
| // caller should have checked for the existence of the class |
| // before calling here, but they did so with *their* class loader, |
| // not the component type's loader.) |
| // |
| // If we find it, the caller adds "loader" to the class' initiating |
| // loader list, which should prevent us from going through this again. |
| // |
| // This call is unnecessary if "loader" and "component_type->GetClassLoader()" |
| // are the same, because our caller (FindClass) just did the |
| // lookup. (Even if we get this wrong we still have correct behavior, |
| // because we effectively do this lookup again when we add the new |
| // class to the hash table --- necessary because of possible races with |
| // other threads.) |
| if (class_loader.Get() != component_type->GetClassLoader()) { |
| mirror::Class* new_class = LookupClass(self, descriptor, component_type->GetClassLoader()); |
| if (new_class != nullptr) { |
| return new_class; |
| } |
| } |
| |
| // Fill out the fields in the Class. |
| // |
| // It is possible to execute some methods against arrays, because |
| // all arrays are subclasses of java_lang_Object_, so we need to set |
| // up a vtable. We can just point at the one in java_lang_Object_. |
| // |
| // Array classes are simple enough that we don't need to do a full |
| // link step. |
| auto new_class = hs.NewHandle<mirror::Class>(nullptr); |
| if (UNLIKELY(!init_done_)) { |
| // Classes that were hand created, ie not by FindSystemClass |
| if (strcmp(descriptor, "[Ljava/lang/Class;") == 0) { |
| new_class.Assign(GetClassRoot(kClassArrayClass)); |
| } else if (strcmp(descriptor, "[Ljava/lang/Object;") == 0) { |
| new_class.Assign(GetClassRoot(kObjectArrayClass)); |
| } else if (strcmp(descriptor, class_roots_descriptors_[kJavaLangStringArrayClass]) == 0) { |
| new_class.Assign(GetClassRoot(kJavaLangStringArrayClass)); |
| } else if (strcmp(descriptor, |
| class_roots_descriptors_[kJavaLangReflectArtMethodArrayClass]) == 0) { |
| new_class.Assign(GetClassRoot(kJavaLangReflectArtMethodArrayClass)); |
| } else if (strcmp(descriptor, |
| class_roots_descriptors_[kJavaLangReflectArtFieldArrayClass]) == 0) { |
| new_class.Assign(GetClassRoot(kJavaLangReflectArtFieldArrayClass)); |
| } else if (strcmp(descriptor, "[C") == 0) { |
| new_class.Assign(GetClassRoot(kCharArrayClass)); |
| } else if (strcmp(descriptor, "[I") == 0) { |
| new_class.Assign(GetClassRoot(kIntArrayClass)); |
| } |
| } |
| if (new_class.Get() == nullptr) { |
| new_class.Assign(AllocClass(self, mirror::Array::ClassSize())); |
| if (new_class.Get() == nullptr) { |
| return nullptr; |
| } |
| new_class->SetComponentType(component_type.Get()); |
| } |
| ObjectLock<mirror::Class> lock(self, new_class); // Must hold lock on object when initializing. |
| DCHECK(new_class->GetComponentType() != nullptr); |
| mirror::Class* java_lang_Object = GetClassRoot(kJavaLangObject); |
| new_class->SetSuperClass(java_lang_Object); |
| new_class->SetVTable(java_lang_Object->GetVTable()); |
| new_class->SetPrimitiveType(Primitive::kPrimNot); |
| new_class->SetClassLoader(component_type->GetClassLoader()); |
| new_class->SetStatus(mirror::Class::kStatusLoaded, self); |
| new_class->PopulateEmbeddedImtAndVTable(); |
| new_class->SetStatus(mirror::Class::kStatusInitialized, self); |
| // don't need to set new_class->SetObjectSize(..) |
| // because Object::SizeOf delegates to Array::SizeOf |
| |
| |
| // All arrays have java/lang/Cloneable and java/io/Serializable as |
| // interfaces. We need to set that up here, so that stuff like |
| // "instanceof" works right. |
| // |
| // Note: The GC could run during the call to FindSystemClass, |
| // so we need to make sure the class object is GC-valid while we're in |
| // there. Do this by clearing the interface list so the GC will just |
| // think that the entries are null. |
| |
| |
| // Use the single, global copies of "interfaces" and "iftable" |
| // (remember not to free them for arrays). |
| { |
| mirror::IfTable* array_iftable = array_iftable_.Read(); |
| CHECK(array_iftable != nullptr); |
| new_class->SetIfTable(array_iftable); |
| } |
| |
| // Inherit access flags from the component type. |
| int access_flags = new_class->GetComponentType()->GetAccessFlags(); |
| // Lose any implementation detail flags; in particular, arrays aren't finalizable. |
| access_flags &= kAccJavaFlagsMask; |
| // Arrays can't be used as a superclass or interface, so we want to add "abstract final" |
| // and remove "interface". |
| access_flags |= kAccAbstract | kAccFinal; |
| access_flags &= ~kAccInterface; |
| |
| new_class->SetAccessFlags(access_flags); |
| |
| mirror::Class* existing = InsertClass(descriptor, new_class.Get(), Hash(descriptor)); |
| if (existing == nullptr) { |
| return new_class.Get(); |
| } |
| // Another thread must have loaded the class after we |
| // started but before we finished. Abandon what we've |
| // done. |
| // |
| // (Yes, this happens.) |
| |
| return existing; |
| } |
| |
| mirror::Class* ClassLinker::FindPrimitiveClass(char type) { |
| switch (type) { |
| case 'B': |
| return GetClassRoot(kPrimitiveByte); |
| case 'C': |
| return GetClassRoot(kPrimitiveChar); |
| case 'D': |
| return GetClassRoot(kPrimitiveDouble); |
| case 'F': |
| return GetClassRoot(kPrimitiveFloat); |
| case 'I': |
| return GetClassRoot(kPrimitiveInt); |
| case 'J': |
| return GetClassRoot(kPrimitiveLong); |
| case 'S': |
| return GetClassRoot(kPrimitiveShort); |
| case 'Z': |
| return GetClassRoot(kPrimitiveBoolean); |
| case 'V': |
| return GetClassRoot(kPrimitiveVoid); |
| default: |
| break; |
| } |
| std::string printable_type(PrintableChar(type)); |
| ThrowNoClassDefFoundError("Not a primitive type: %s", printable_type.c_str()); |
| return nullptr; |
| } |
| |
| mirror::Class* ClassLinker::InsertClass(const char* descriptor, mirror::Class* klass, |
| size_t hash) { |
| if (VLOG_IS_ON(class_linker)) { |
| mirror::DexCache* dex_cache = klass->GetDexCache(); |
| std::string source; |
| if (dex_cache != nullptr) { |
| source += " from "; |
| source += dex_cache->GetLocation()->ToModifiedUtf8(); |
| } |
| LOG(INFO) << "Loaded class " << descriptor << source; |
| } |
| WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| mirror::Class* existing = |
| LookupClassFromTableLocked(descriptor, klass->GetClassLoader(), hash); |
| if (existing != nullptr) { |
| return existing; |
| } |
| if (kIsDebugBuild && !klass->IsTemp() && klass->GetClassLoader() == nullptr && |
| dex_cache_image_class_lookup_required_) { |
| // Check a class loaded with the system class loader matches one in the image if the class |
| // is in the image. |
| existing = LookupClassFromImage(descriptor); |
| if (existing != nullptr) { |
| CHECK(klass == existing); |
| } |
| } |
| VerifyObject(klass); |
| class_table_.insert(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| if (log_new_class_table_roots_) { |
| new_class_roots_.push_back(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| } |
| return nullptr; |
| } |
| |
| mirror::Class* ClassLinker::UpdateClass(const char* descriptor, mirror::Class* klass, |
| size_t hash) { |
| WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| mirror::Class* existing = |
| LookupClassFromTableLocked(descriptor, klass->GetClassLoader(), hash); |
| |
| if (existing == nullptr) { |
| CHECK(klass->IsProxyClass()); |
| return nullptr; |
| } |
| |
| CHECK_NE(existing, klass) << descriptor; |
| CHECK(!existing->IsResolved()) << descriptor; |
| CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusResolving) << descriptor; |
| |
| for (auto it = class_table_.lower_bound(hash), end = class_table_.end(); |
| it != end && it->first == hash; ++it) { |
| mirror::Class* klass = it->second.Read(); |
| if (klass == existing) { |
| class_table_.erase(it); |
| break; |
| } |
| } |
| |
| CHECK(!klass->IsTemp()) << descriptor; |
| if (kIsDebugBuild && klass->GetClassLoader() == nullptr && |
| dex_cache_image_class_lookup_required_) { |
| // Check a class loaded with the system class loader matches one in the image if the class |
| // is in the image. |
| existing = LookupClassFromImage(descriptor); |
| if (existing != nullptr) { |
| CHECK(klass == existing) << descriptor; |
| } |
| } |
| VerifyObject(klass); |
| |
| class_table_.insert(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| if (log_new_class_table_roots_) { |
| new_class_roots_.push_back(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| } |
| |
| return existing; |
| } |
| |
| bool ClassLinker::RemoveClass(const char* descriptor, const mirror::ClassLoader* class_loader) { |
| size_t hash = Hash(descriptor); |
| WriterMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| for (auto it = class_table_.lower_bound(hash), end = class_table_.end(); |
| it != end && it->first == hash; |
| ++it) { |
| mirror::Class* klass = it->second.Read(); |
| if (klass->GetClassLoader() == class_loader && klass->DescriptorEquals(descriptor)) { |
| class_table_.erase(it); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| mirror::Class* ClassLinker::LookupClass(Thread* self, const char* descriptor, |
| const mirror::ClassLoader* class_loader) { |
| size_t hash = Hash(descriptor); |
| { |
| ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_); |
| mirror::Class* result = LookupClassFromTableLocked(descriptor, class_loader, hash); |
| if (result != nullptr) { |
| return result; |
| } |
| } |
| if (class_loader != nullptr || !dex_cache_image_class_lookup_required_) { |
| return nullptr; |
| } else { |
| // Lookup failed but need to search dex_caches_. |
| mirror::Class* result = LookupClassFromImage(descriptor); |
| if (result != nullptr) { |
| InsertClass(descriptor, result, hash); |
| } else { |
| // Searching the image dex files/caches failed, we don't want to get into this situation |
| // often as map searches are faster, so after kMaxFailedDexCacheLookups move all image |
| // classes into the class table. |
| constexpr uint32_t kMaxFailedDexCacheLookups = 1000; |
| if (++failed_dex_cache_class_lookups_ > kMaxFailedDexCacheLookups) { |
| MoveImageClassesToClassTable(); |
| } |
| } |
| return result; |
| } |
| } |
| |
| mirror::Class* ClassLinker::LookupClassFromTableLocked(const char* descriptor, |
| const mirror::ClassLoader* class_loader, |
| size_t hash) { |
| auto end = class_table_.end(); |
| for (auto it = class_table_.lower_bound(hash); it != end && it->first == hash; ++it) { |
| mirror::Class* klass = it->second.Read(); |
| if (klass->GetClassLoader() == class_loader && klass->DescriptorEquals(descriptor)) { |
| if (kIsDebugBuild) { |
| // Check for duplicates in the table. |
| for (++it; it != end && it->first == hash; ++it) { |
| mirror::Class* klass2 = it->second.Read(); |
| CHECK(!(klass2->GetClassLoader() == class_loader && |
| klass2->DescriptorEquals(descriptor))) |
| << PrettyClass(klass) << " " << klass << " " << klass->GetClassLoader() << " " |
| << PrettyClass(klass2) << " " << klass2 << " " << klass2->GetClassLoader(); |
| } |
| } |
| return klass; |
| } |
| } |
| return nullptr; |
| } |
| |
| static mirror::ObjectArray<mirror::DexCache>* GetImageDexCaches() |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| gc::space::ImageSpace* image = Runtime::Current()->GetHeap()->GetImageSpace(); |
| CHECK(image != nullptr); |
| mirror::Object* root = image->GetImageHeader().GetImageRoot(ImageHeader::kDexCaches); |
| return root->AsObjectArray<mirror::DexCache>(); |
| } |
| |
| void ClassLinker::MoveImageClassesToClassTable() { |
| Thread* self = Thread::Current(); |
| WriterMutexLock mu(self, *Locks::classlinker_classes_lock_); |
| if (!dex_cache_image_class_lookup_required_) { |
| return; // All dex cache classes are already in the class table. |
| } |
| ScopedAssertNoThreadSuspension ants(self, "Moving image classes to class table"); |
| mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches(); |
| std::string temp; |
| for (int32_t i = 0; i < dex_caches->GetLength(); i++) { |
| mirror::DexCache* dex_cache = dex_caches->Get(i); |
| mirror::ObjectArray<mirror::Class>* types = dex_cache->GetResolvedTypes(); |
| for (int32_t j = 0; j < types->GetLength(); j++) { |
| mirror::Class* klass = types->Get(j); |
| if (klass != nullptr) { |
| DCHECK(klass->GetClassLoader() == nullptr); |
| const char* descriptor = klass->GetDescriptor(&temp); |
| size_t hash = Hash(descriptor); |
| mirror::Class* existing = LookupClassFromTableLocked(descriptor, nullptr, hash); |
| if (existing != nullptr) { |
| CHECK(existing == klass) << PrettyClassAndClassLoader(existing) << " != " |
| << PrettyClassAndClassLoader(klass); |
| } else { |
| class_table_.insert(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| if (log_new_class_table_roots_) { |
| new_class_roots_.push_back(std::make_pair(hash, GcRoot<mirror::Class>(klass))); |
| } |
| } |
| } |
| } |
| } |
| dex_cache_image_class_lookup_required_ = false; |
| } |
| |
| mirror::Class* ClassLinker::LookupClassFromImage(const char* descriptor) { |
| ScopedAssertNoThreadSuspension ants(Thread::Current(), "Image class lookup"); |
| mirror::ObjectArray<mirror::DexCache>* dex_caches = GetImageDexCaches(); |
| for (int32_t i = 0; i < dex_caches->GetLength(); ++i) { |
| mirror::DexCache* dex_cache = dex_caches->Get(i); |
| const DexFile* dex_file = dex_cache->GetDexFile(); |
| // Try binary searching the string/type index. |
| const DexFile::StringId* string_id = dex_file->FindStringId(descriptor); |
| if (string_id != nullptr) { |
| const DexFile::TypeId* type_id = |
| dex_file->FindTypeId(dex_file->GetIndexForStringId(*string_id)); |
| if (type_id != nullptr) { |
| uint16_t type_idx = dex_file->GetIndexForTypeId(*type_id); |
| mirror::Class* klass = dex_cache->GetResolvedType(type_idx); |
| if (klass != nullptr) { |
| return klass; |
| } |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| void ClassLinker::LookupClasses(const char* descriptor, std::vector<mirror::Class*>& result) { |
| result.clear(); |
| if (dex_cache_image_class_lookup_required_) { |
| MoveImageClassesToClassTable(); |
| } |
| size_t hash = Hash(descriptor); |
| ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| for (auto it = class_table_.lower_bound(hash), end = class_table_.end(); |
| it != end && it->first == hash; ++it) { |
| mirror::Class* klass = it->second.Read(); |
| if (klass->DescriptorEquals(descriptor)) { |
| result.push_back(klass); |
| } |
| } |
| } |
| |
| void ClassLinker::VerifyClass(Thread* self, Handle<mirror::Class> klass) { |
| // TODO: assert that the monitor on the Class is held |
| ObjectLock<mirror::Class> lock(self, klass); |
| |
| // Don't attempt to re-verify if already sufficiently verified. |
| if (klass->IsVerified()) { |
| EnsurePreverifiedMethods(klass); |
| return; |
| } |
| if (klass->IsCompileTimeVerified() && Runtime::Current()->IsCompiler()) { |
| return; |
| } |
| |
| // The class might already be erroneous, for example at compile time if we attempted to verify |
| // this class as a parent to another. |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass.Get()); |
| return; |
| } |
| |
| if (klass->GetStatus() == mirror::Class::kStatusResolved) { |
| klass->SetStatus(mirror::Class::kStatusVerifying, self); |
| } else { |
| CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime) |
| << PrettyClass(klass.Get()); |
| CHECK(!Runtime::Current()->IsCompiler()); |
| klass->SetStatus(mirror::Class::kStatusVerifyingAtRuntime, self); |
| } |
| |
| // Skip verification if disabled. |
| if (!Runtime::Current()->IsVerificationEnabled()) { |
| klass->SetStatus(mirror::Class::kStatusVerified, self); |
| EnsurePreverifiedMethods(klass); |
| return; |
| } |
| |
| // Verify super class. |
| StackHandleScope<2> hs(self); |
| Handle<mirror::Class> super(hs.NewHandle(klass->GetSuperClass())); |
| if (super.Get() != nullptr) { |
| // Acquire lock to prevent races on verifying the super class. |
| ObjectLock<mirror::Class> lock(self, super); |
| |
| if (!super->IsVerified() && !super->IsErroneous()) { |
| VerifyClass(self, super); |
| } |
| if (!super->IsCompileTimeVerified()) { |
| std::string error_msg( |
| StringPrintf("Rejecting class %s that attempts to sub-class erroneous class %s", |
| PrettyDescriptor(klass.Get()).c_str(), |
| PrettyDescriptor(super.Get()).c_str())); |
| LOG(ERROR) << error_msg << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8(); |
| Handle<mirror::Throwable> cause(hs.NewHandle(self->GetException(nullptr))); |
| if (cause.Get() != nullptr) { |
| self->ClearException(); |
| } |
| ThrowVerifyError(klass.Get(), "%s", error_msg.c_str()); |
| if (cause.Get() != nullptr) { |
| self->GetException(nullptr)->SetCause(cause.Get()); |
| } |
| ClassReference ref(klass->GetDexCache()->GetDexFile(), klass->GetDexClassDefIndex()); |
| if (Runtime::Current()->IsCompiler()) { |
| Runtime::Current()->GetCompilerCallbacks()->ClassRejected(ref); |
| } |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return; |
| } |
| } |
| |
| // Try to use verification information from the oat file, otherwise do runtime verification. |
| const DexFile& dex_file = *klass->GetDexCache()->GetDexFile(); |
| mirror::Class::Status oat_file_class_status(mirror::Class::kStatusNotReady); |
| bool preverified = VerifyClassUsingOatFile(dex_file, klass.Get(), oat_file_class_status); |
| if (oat_file_class_status == mirror::Class::kStatusError) { |
| VLOG(class_linker) << "Skipping runtime verification of erroneous class " |
| << PrettyDescriptor(klass.Get()) << " in " |
| << klass->GetDexCache()->GetLocation()->ToModifiedUtf8(); |
| ThrowVerifyError(klass.Get(), "Rejecting class %s because it failed compile-time verification", |
| PrettyDescriptor(klass.Get()).c_str()); |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return; |
| } |
| verifier::MethodVerifier::FailureKind verifier_failure = verifier::MethodVerifier::kNoFailure; |
| std::string error_msg; |
| if (!preverified) { |
| verifier_failure = verifier::MethodVerifier::VerifyClass(self, klass.Get(), |
| Runtime::Current()->IsCompiler(), |
| &error_msg); |
| } |
| if (preverified || verifier_failure != verifier::MethodVerifier::kHardFailure) { |
| if (!preverified && verifier_failure != verifier::MethodVerifier::kNoFailure) { |
| VLOG(class_linker) << "Soft verification failure in class " << PrettyDescriptor(klass.Get()) |
| << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8() |
| << " because: " << error_msg; |
| } |
| self->AssertNoPendingException(); |
| // Make sure all classes referenced by catch blocks are resolved. |
| ResolveClassExceptionHandlerTypes(dex_file, klass); |
| if (verifier_failure == verifier::MethodVerifier::kNoFailure) { |
| // Even though there were no verifier failures we need to respect whether the super-class |
| // was verified or requiring runtime reverification. |
| if (super.Get() == nullptr || super->IsVerified()) { |
| klass->SetStatus(mirror::Class::kStatusVerified, self); |
| } else { |
| CHECK_EQ(super->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); |
| klass->SetStatus(mirror::Class::kStatusRetryVerificationAtRuntime, self); |
| // Pretend a soft failure occured so that we don't consider the class verified below. |
| verifier_failure = verifier::MethodVerifier::kSoftFailure; |
| } |
| } else { |
| CHECK_EQ(verifier_failure, verifier::MethodVerifier::kSoftFailure); |
| // Soft failures at compile time should be retried at runtime. Soft |
| // failures at runtime will be handled by slow paths in the generated |
| // code. Set status accordingly. |
| if (Runtime::Current()->IsCompiler()) { |
| klass->SetStatus(mirror::Class::kStatusRetryVerificationAtRuntime, self); |
| } else { |
| klass->SetStatus(mirror::Class::kStatusVerified, self); |
| // As this is a fake verified status, make sure the methods are _not_ marked preverified |
| // later. |
| klass->SetPreverified(); |
| } |
| } |
| } else { |
| LOG(ERROR) << "Verification failed on class " << PrettyDescriptor(klass.Get()) |
| << " in " << klass->GetDexCache()->GetLocation()->ToModifiedUtf8() |
| << " because: " << error_msg; |
| self->AssertNoPendingException(); |
| ThrowVerifyError(klass.Get(), "%s", error_msg.c_str()); |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| } |
| if (preverified || verifier_failure == verifier::MethodVerifier::kNoFailure) { |
| // Class is verified so we don't need to do any access check on its methods. |
| // Let the interpreter know it by setting the kAccPreverified flag onto each |
| // method. |
| // Note: we're going here during compilation and at runtime. When we set the |
| // kAccPreverified flag when compiling image classes, the flag is recorded |
| // in the image and is set when loading the image. |
| EnsurePreverifiedMethods(klass); |
| } |
| } |
| |
| void ClassLinker::EnsurePreverifiedMethods(Handle<mirror::Class> klass) { |
| if (!klass->IsPreverified()) { |
| klass->SetPreverifiedFlagOnAllMethods(); |
| klass->SetPreverified(); |
| } |
| } |
| |
| bool ClassLinker::VerifyClassUsingOatFile(const DexFile& dex_file, mirror::Class* klass, |
| mirror::Class::Status& oat_file_class_status) { |
| // If we're compiling, we can only verify the class using the oat file if |
| // we are not compiling the image or if the class we're verifying is not part of |
| // the app. In other words, we will only check for preverification of bootclasspath |
| // classes. |
| if (Runtime::Current()->IsCompiler()) { |
| // Are we compiling the bootclasspath? |
| if (!Runtime::Current()->UseCompileTimeClassPath()) { |
| return false; |
| } |
| // We are compiling an app (not the image). |
| |
| // Is this an app class? (I.e. not a bootclasspath class) |
| if (klass->GetClassLoader() != nullptr) { |
| return false; |
| } |
| } |
| |
| const OatFile::OatDexFile* oat_dex_file = FindOpenedOatDexFileForDexFile(dex_file); |
| // In case we run without an image there won't be a backing oat file. |
| if (oat_dex_file == nullptr) { |
| return false; |
| } |
| |
| uint16_t class_def_index = klass->GetDexClassDefIndex(); |
| oat_file_class_status = oat_dex_file->GetOatClass(class_def_index).GetStatus(); |
| if (oat_file_class_status == mirror::Class::kStatusVerified || |
| oat_file_class_status == mirror::Class::kStatusInitialized) { |
| return true; |
| } |
| if (oat_file_class_status == mirror::Class::kStatusRetryVerificationAtRuntime) { |
| // Compile time verification failed with a soft error. Compile time verification can fail |
| // because we have incomplete type information. Consider the following: |
| // class ... { |
| // Foo x; |
| // .... () { |
| // if (...) { |
| // v1 gets assigned a type of resolved class Foo |
| // } else { |
| // v1 gets assigned a type of unresolved class Bar |
| // } |
| // iput x = v1 |
| // } } |
| // when we merge v1 following the if-the-else it results in Conflict |
| // (see verifier::RegType::Merge) as we can't know the type of Bar and we could possibly be |
| // allowing an unsafe assignment to the field x in the iput (javac may have compiled this as |
| // it knew Bar was a sub-class of Foo, but for us this may have been moved into a separate apk |
| // at compile time). |
| return false; |
| } |
| if (oat_file_class_status == mirror::Class::kStatusError) { |
| // Compile time verification failed with a hard error. This is caused by invalid instructions |
| // in the class. These errors are unrecoverable. |
| return false; |
| } |
| if (oat_file_class_status == mirror::Class::kStatusNotReady) { |
| // Status is uninitialized if we couldn't determine the status at compile time, for example, |
| // not loading the class. |
| // TODO: when the verifier doesn't rely on Class-es failing to resolve/load the type hierarchy |
| // isn't a problem and this case shouldn't occur |
| return false; |
| } |
| std::string temp; |
| LOG(FATAL) << "Unexpected class status: " << oat_file_class_status |
| << " " << dex_file.GetLocation() << " " << PrettyClass(klass) << " " |
| << klass->GetDescriptor(&temp); |
| |
| return false; |
| } |
| |
| void ClassLinker::ResolveClassExceptionHandlerTypes(const DexFile& dex_file, |
| Handle<mirror::Class> klass) { |
| for (size_t i = 0; i < klass->NumDirectMethods(); i++) { |
| ResolveMethodExceptionHandlerTypes(dex_file, klass->GetDirectMethod(i)); |
| } |
| for (size_t i = 0; i < klass->NumVirtualMethods(); i++) { |
| ResolveMethodExceptionHandlerTypes(dex_file, klass->GetVirtualMethod(i)); |
| } |
| } |
| |
| void ClassLinker::ResolveMethodExceptionHandlerTypes(const DexFile& dex_file, |
| mirror::ArtMethod* method) { |
| // similar to DexVerifier::ScanTryCatchBlocks and dex2oat's ResolveExceptionsForMethod. |
| const DexFile::CodeItem* code_item = dex_file.GetCodeItem(method->GetCodeItemOffset()); |
| if (code_item == nullptr) { |
| return; // native or abstract method |
| } |
| if (code_item->tries_size_ == 0) { |
| return; // nothing to process |
| } |
| const byte* handlers_ptr = DexFile::GetCatchHandlerData(*code_item, 0); |
| uint32_t handlers_size = DecodeUnsignedLeb128(&handlers_ptr); |
| ClassLinker* linker = Runtime::Current()->GetClassLinker(); |
| for (uint32_t idx = 0; idx < handlers_size; idx++) { |
| CatchHandlerIterator iterator(handlers_ptr); |
| for (; iterator.HasNext(); iterator.Next()) { |
| // Ensure exception types are resolved so that they don't need resolution to be delivered, |
| // unresolved exception types will be ignored by exception delivery |
| if (iterator.GetHandlerTypeIndex() != DexFile::kDexNoIndex16) { |
| mirror::Class* exception_type = linker->ResolveType(iterator.GetHandlerTypeIndex(), method); |
| if (exception_type == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| Thread::Current()->ClearException(); |
| } |
| } |
| } |
| handlers_ptr = iterator.EndDataPointer(); |
| } |
| } |
| |
| static void CheckProxyConstructor(mirror::ArtMethod* constructor); |
| static void CheckProxyMethod(Handle<mirror::ArtMethod> method, |
| Handle<mirror::ArtMethod> prototype); |
| |
| mirror::Class* ClassLinker::CreateProxyClass(ScopedObjectAccessAlreadyRunnable& soa, jstring name, |
| jobjectArray interfaces, jobject loader, |
| jobjectArray methods, jobjectArray throws) { |
| Thread* self = soa.Self(); |
| StackHandleScope<8> hs(self); |
| MutableHandle<mirror::Class> klass(hs.NewHandle( |
| AllocClass(self, GetClassRoot(kJavaLangClass), sizeof(mirror::Class)))); |
| if (klass.Get() == nullptr) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| DCHECK(klass->GetClass() != nullptr); |
| klass->SetObjectSize(sizeof(mirror::Proxy)); |
| // Set the class access flags incl. preverified, so we do not try to set the flag on the methods. |
| klass->SetAccessFlags(kAccClassIsProxy | kAccPublic | kAccFinal | kAccPreverified); |
| klass->SetClassLoader(soa.Decode<mirror::ClassLoader*>(loader)); |
| DCHECK_EQ(klass->GetPrimitiveType(), Primitive::kPrimNot); |
| klass->SetName(soa.Decode<mirror::String*>(name)); |
| mirror::Class* proxy_class = GetClassRoot(kJavaLangReflectProxy); |
| klass->SetDexCache(proxy_class->GetDexCache()); |
| klass->SetStatus(mirror::Class::kStatusIdx, self); |
| |
| // Instance fields are inherited, but we add a couple of static fields... |
| { |
| mirror::ObjectArray<mirror::ArtField>* sfields = AllocArtFieldArray(self, 2); |
| if (UNLIKELY(sfields == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetSFields(sfields); |
| } |
| // 1. Create a static field 'interfaces' that holds the _declared_ interfaces implemented by |
| // our proxy, so Class.getInterfaces doesn't return the flattened set. |
| Handle<mirror::ArtField> interfaces_sfield(hs.NewHandle(AllocArtField(self))); |
| if (UNLIKELY(interfaces_sfield.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetStaticField(0, interfaces_sfield.Get()); |
| interfaces_sfield->SetDexFieldIndex(0); |
| interfaces_sfield->SetDeclaringClass(klass.Get()); |
| interfaces_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal); |
| // 2. Create a static field 'throws' that holds exceptions thrown by our methods. |
| Handle<mirror::ArtField> throws_sfield(hs.NewHandle(AllocArtField(self))); |
| if (UNLIKELY(throws_sfield.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetStaticField(1, throws_sfield.Get()); |
| throws_sfield->SetDexFieldIndex(1); |
| throws_sfield->SetDeclaringClass(klass.Get()); |
| throws_sfield->SetAccessFlags(kAccStatic | kAccPublic | kAccFinal); |
| |
| // Proxies have 1 direct method, the constructor |
| { |
| mirror::ObjectArray<mirror::ArtMethod>* directs = AllocArtMethodArray(self, 1); |
| if (UNLIKELY(directs == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetDirectMethods(directs); |
| mirror::ArtMethod* constructor = CreateProxyConstructor(self, klass, proxy_class); |
| if (UNLIKELY(constructor == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetDirectMethod(0, constructor); |
| } |
| |
| // Create virtual method using specified prototypes. |
| size_t num_virtual_methods = |
| soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods)->GetLength(); |
| { |
| mirror::ObjectArray<mirror::ArtMethod>* virtuals = AllocArtMethodArray(self, |
| num_virtual_methods); |
| if (UNLIKELY(virtuals == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetVirtualMethods(virtuals); |
| } |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| StackHandleScope<1> hs(self); |
| mirror::ObjectArray<mirror::ArtMethod>* decoded_methods = |
| soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods); |
| Handle<mirror::ArtMethod> prototype(hs.NewHandle(decoded_methods->Get(i))); |
| mirror::ArtMethod* clone = CreateProxyMethod(self, klass, prototype); |
| if (UNLIKELY(clone == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| klass->SetVirtualMethod(i, clone); |
| } |
| |
| klass->SetSuperClass(proxy_class); // The super class is java.lang.reflect.Proxy |
| klass->SetStatus(mirror::Class::kStatusLoaded, self); // Now effectively in the loaded state. |
| self->AssertNoPendingException(); |
| |
| std::string descriptor(GetDescriptorForProxy(klass.Get())); |
| mirror::Class* new_class = nullptr; |
| { |
| // Must hold lock on object when resolved. |
| ObjectLock<mirror::Class> resolution_lock(self, klass); |
| // Link the fields and virtual methods, creating vtable and iftables |
| Handle<mirror::ObjectArray<mirror::Class> > h_interfaces( |
| hs.NewHandle(soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces))); |
| if (!LinkClass(self, descriptor.c_str(), klass, h_interfaces, &new_class)) { |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return nullptr; |
| } |
| } |
| |
| CHECK(klass->IsRetired()); |
| CHECK_NE(klass.Get(), new_class); |
| klass.Assign(new_class); |
| |
| CHECK_EQ(interfaces_sfield->GetDeclaringClass(), new_class); |
| interfaces_sfield->SetObject<false>(klass.Get(), |
| soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces)); |
| CHECK_EQ(throws_sfield->GetDeclaringClass(), new_class); |
| throws_sfield->SetObject<false>(klass.Get(), |
| soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class> >*>(throws)); |
| |
| { |
| // Lock on klass is released. Lock new class object. |
| ObjectLock<mirror::Class> initialization_lock(self, klass); |
| klass->SetStatus(mirror::Class::kStatusInitialized, self); |
| } |
| |
| // sanity checks |
| if (kIsDebugBuild) { |
| CHECK(klass->GetIFields() == nullptr); |
| CheckProxyConstructor(klass->GetDirectMethod(0)); |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| StackHandleScope<2> hs(self); |
| mirror::ObjectArray<mirror::ArtMethod>* decoded_methods = |
| soa.Decode<mirror::ObjectArray<mirror::ArtMethod>*>(methods); |
| Handle<mirror::ArtMethod> prototype(hs.NewHandle(decoded_methods->Get(i))); |
| Handle<mirror::ArtMethod> virtual_method(hs.NewHandle(klass->GetVirtualMethod(i))); |
| CheckProxyMethod(virtual_method, prototype); |
| } |
| |
| mirror::String* decoded_name = soa.Decode<mirror::String*>(name); |
| std::string interfaces_field_name(StringPrintf("java.lang.Class[] %s.interfaces", |
| decoded_name->ToModifiedUtf8().c_str())); |
| CHECK_EQ(PrettyField(klass->GetStaticField(0)), interfaces_field_name); |
| |
| std::string throws_field_name(StringPrintf("java.lang.Class[][] %s.throws", |
| decoded_name->ToModifiedUtf8().c_str())); |
| CHECK_EQ(PrettyField(klass->GetStaticField(1)), throws_field_name); |
| |
| CHECK_EQ(klass.Get()->GetInterfaces(), |
| soa.Decode<mirror::ObjectArray<mirror::Class>*>(interfaces)); |
| CHECK_EQ(klass.Get()->GetThrows(), |
| soa.Decode<mirror::ObjectArray<mirror::ObjectArray<mirror::Class>>*>(throws)); |
| } |
| mirror::Class* existing = InsertClass(descriptor.c_str(), klass.Get(), Hash(descriptor.c_str())); |
| CHECK(existing == nullptr); |
| return klass.Get(); |
| } |
| |
| std::string ClassLinker::GetDescriptorForProxy(mirror::Class* proxy_class) { |
| DCHECK(proxy_class->IsProxyClass()); |
| mirror::String* name = proxy_class->GetName(); |
| DCHECK(name != nullptr); |
| return DotToDescriptor(name->ToModifiedUtf8().c_str()); |
| } |
| |
| mirror::ArtMethod* ClassLinker::FindMethodForProxy(mirror::Class* proxy_class, |
| mirror::ArtMethod* proxy_method) { |
| DCHECK(proxy_class->IsProxyClass()); |
| DCHECK(proxy_method->IsProxyMethod()); |
| // Locate the dex cache of the original interface/Object |
| mirror::DexCache* dex_cache = nullptr; |
| { |
| ReaderMutexLock mu(Thread::Current(), dex_lock_); |
| for (size_t i = 0; i != dex_caches_.size(); ++i) { |
| mirror::DexCache* a_dex_cache = GetDexCache(i); |
| if (proxy_method->HasSameDexCacheResolvedTypes(a_dex_cache->GetResolvedTypes())) { |
| dex_cache = a_dex_cache; |
| break; |
| } |
| } |
| } |
| CHECK(dex_cache != nullptr); |
| uint32_t method_idx = proxy_method->GetDexMethodIndex(); |
| mirror::ArtMethod* resolved_method = dex_cache->GetResolvedMethod(method_idx); |
| CHECK(resolved_method != nullptr); |
| return resolved_method; |
| } |
| |
| |
| mirror::ArtMethod* ClassLinker::CreateProxyConstructor(Thread* self, |
| Handle<mirror::Class> klass, |
| mirror::Class* proxy_class) { |
| // Create constructor for Proxy that must initialize h |
| mirror::ObjectArray<mirror::ArtMethod>* proxy_direct_methods = |
| proxy_class->GetDirectMethods(); |
| CHECK_EQ(proxy_direct_methods->GetLength(), 16); |
| mirror::ArtMethod* proxy_constructor = proxy_direct_methods->Get(2); |
| // Ensure constructor is in dex cache so that we can use the dex cache to look up the overridden |
| // constructor method. |
| proxy_class->GetDexCache()->SetResolvedMethod(proxy_constructor->GetDexMethodIndex(), |
| proxy_constructor); |
| // Clone the existing constructor of Proxy (our constructor would just invoke it so steal its |
| // code_ too) |
| mirror::ArtMethod* constructor = down_cast<mirror::ArtMethod*>(proxy_constructor->Clone(self)); |
| if (constructor == nullptr) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| // Make this constructor public and fix the class to be our Proxy version |
| constructor->SetAccessFlags((constructor->GetAccessFlags() & ~kAccProtected) | kAccPublic); |
| constructor->SetDeclaringClass(klass.Get()); |
| return constructor; |
| } |
| |
| static void CheckProxyConstructor(mirror::ArtMethod* constructor) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(constructor->IsConstructor()); |
| CHECK_STREQ(constructor->GetName(), "<init>"); |
| CHECK_STREQ(constructor->GetSignature().ToString().c_str(), |
| "(Ljava/lang/reflect/InvocationHandler;)V"); |
| DCHECK(constructor->IsPublic()); |
| } |
| |
| mirror::ArtMethod* ClassLinker::CreateProxyMethod(Thread* self, |
| Handle<mirror::Class> klass, |
| Handle<mirror::ArtMethod> prototype) { |
| // Ensure prototype is in dex cache so that we can use the dex cache to look up the overridden |
| // prototype method |
| prototype->GetDeclaringClass()->GetDexCache()->SetResolvedMethod(prototype->GetDexMethodIndex(), |
| prototype.Get()); |
| // We steal everything from the prototype (such as DexCache, invoke stub, etc.) then specialize |
| // as necessary |
| mirror::ArtMethod* method = down_cast<mirror::ArtMethod*>(prototype->Clone(self)); |
| if (UNLIKELY(method == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return nullptr; |
| } |
| |
| // Set class to be the concrete proxy class and clear the abstract flag, modify exceptions to |
| // the intersection of throw exceptions as defined in Proxy |
| method->SetDeclaringClass(klass.Get()); |
| method->SetAccessFlags((method->GetAccessFlags() & ~kAccAbstract) | kAccFinal); |
| |
| // At runtime the method looks like a reference and argument saving method, clone the code |
| // related parameters from this method. |
| method->SetEntryPointFromQuickCompiledCode(GetQuickProxyInvokeHandler()); |
| method->SetEntryPointFromPortableCompiledCode(GetPortableProxyInvokeHandler()); |
| method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge); |
| |
| return method; |
| } |
| |
| static void CheckProxyMethod(Handle<mirror::ArtMethod> method, |
| Handle<mirror::ArtMethod> prototype) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // Basic sanity |
| CHECK(!prototype->IsFinal()); |
| CHECK(method->IsFinal()); |
| CHECK(!method->IsAbstract()); |
| |
| // The proxy method doesn't have its own dex cache or dex file and so it steals those of its |
| // interface prototype. The exception to this are Constructors and the Class of the Proxy itself. |
| CHECK_EQ(prototype->GetDexCacheStrings(), method->GetDexCacheStrings()); |
| CHECK(prototype->HasSameDexCacheResolvedMethods(method.Get())); |
| CHECK(prototype->HasSameDexCacheResolvedTypes(method.Get())); |
| CHECK_EQ(prototype->GetDexMethodIndex(), method->GetDexMethodIndex()); |
| |
| StackHandleScope<2> hs(Thread::Current()); |
| MethodHelper mh(hs.NewHandle(method.Get())); |
| MethodHelper mh2(hs.NewHandle(prototype.Get())); |
| CHECK_STREQ(method->GetName(), prototype->GetName()); |
| CHECK_STREQ(method->GetShorty(), prototype->GetShorty()); |
| // More complex sanity - via dex cache |
| CHECK_EQ(mh.GetReturnType(), mh2.GetReturnType()); |
| } |
| |
| static bool CanWeInitializeClass(mirror::Class* klass, bool can_init_statics, |
| bool can_init_parents) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (can_init_statics && can_init_parents) { |
| return true; |
| } |
| if (!can_init_statics) { |
| // Check if there's a class initializer. |
| mirror::ArtMethod* clinit = klass->FindClassInitializer(); |
| if (clinit != nullptr) { |
| return false; |
| } |
| // Check if there are encoded static values needing initialization. |
| if (klass->NumStaticFields() != 0) { |
| const DexFile::ClassDef* dex_class_def = klass->GetClassDef(); |
| DCHECK(dex_class_def != nullptr); |
| if (dex_class_def->static_values_off_ != 0) { |
| return false; |
| } |
| } |
| } |
| if (!klass->IsInterface() && klass->HasSuperClass()) { |
| mirror::Class* super_class = klass->GetSuperClass(); |
| if (!can_init_parents && !super_class->IsInitialized()) { |
| return false; |
| } else { |
| if (!CanWeInitializeClass(super_class, can_init_statics, can_init_parents)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool ClassLinker::InitializeClass(Thread* self, Handle<mirror::Class> klass, |
| bool can_init_statics, bool can_init_parents) { |
| // see JLS 3rd edition, 12.4.2 "Detailed Initialization Procedure" for the locking protocol |
| |
| // Are we already initialized and therefore done? |
| // Note: we differ from the JLS here as we don't do this under the lock, this is benign as |
| // an initialized class will never change its state. |
| if (klass->IsInitialized()) { |
| return true; |
| } |
| |
| // Fast fail if initialization requires a full runtime. Not part of the JLS. |
| if (!CanWeInitializeClass(klass.Get(), can_init_statics, can_init_parents)) { |
| return false; |
| } |
| |
| self->AllowThreadSuspension(); |
| uint64_t t0; |
| { |
| ObjectLock<mirror::Class> lock(self, klass); |
| |
| // Re-check under the lock in case another thread initialized ahead of us. |
| if (klass->IsInitialized()) { |
| return true; |
| } |
| |
| // Was the class already found to be erroneous? Done under the lock to match the JLS. |
| if (klass->IsErroneous()) { |
| ThrowEarlierClassFailure(klass.Get()); |
| return false; |
| } |
| |
| CHECK(klass->IsResolved()) << PrettyClass(klass.Get()) << ": state=" << klass->GetStatus(); |
| |
| if (!klass->IsVerified()) { |
| VerifyClass(self, klass); |
| if (!klass->IsVerified()) { |
| // We failed to verify, expect either the klass to be erroneous or verification failed at |
| // compile time. |
| if (klass->IsErroneous()) { |
| CHECK(self->IsExceptionPending()); |
| } else { |
| CHECK(Runtime::Current()->IsCompiler()); |
| CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusRetryVerificationAtRuntime); |
| } |
| return false; |
| } else { |
| self->AssertNoPendingException(); |
| } |
| } |
| |
| // If the class is kStatusInitializing, either this thread is |
| // initializing higher up the stack or another thread has beat us |
| // to initializing and we need to wait. Either way, this |
| // invocation of InitializeClass will not be responsible for |
| // running <clinit> and will return. |
| if (klass->GetStatus() == mirror::Class::kStatusInitializing) { |
| // Could have got an exception during verification. |
| if (self->IsExceptionPending()) { |
| return false; |
| } |
| // We caught somebody else in the act; was it us? |
| if (klass->GetClinitThreadId() == self->GetTid()) { |
| // Yes. That's fine. Return so we can continue initializing. |
| return true; |
| } |
| // No. That's fine. Wait for another thread to finish initializing. |
| return WaitForInitializeClass(klass, self, lock); |
| } |
| |
| if (!ValidateSuperClassDescriptors(klass)) { |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return false; |
| } |
| self->AllowThreadSuspension(); |
| |
| CHECK_EQ(klass->GetStatus(), mirror::Class::kStatusVerified) << PrettyClass(klass.Get()); |
| |
| // From here out other threads may observe that we're initializing and so changes of state |
| // require the a notification. |
| klass->SetClinitThreadId(self->GetTid()); |
| klass->SetStatus(mirror::Class::kStatusInitializing, self); |
| |
| t0 = NanoTime(); |
| } |
| |
| // Initialize super classes, must be done while initializing for the JLS. |
| if (!klass->IsInterface() && klass->HasSuperClass()) { |
| mirror::Class* super_class = klass->GetSuperClass(); |
| if (!super_class->IsInitialized()) { |
| CHECK(!super_class->IsInterface()); |
| CHECK(can_init_parents); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> handle_scope_super(hs.NewHandle(super_class)); |
| bool super_initialized = InitializeClass(self, handle_scope_super, can_init_statics, true); |
| if (!super_initialized) { |
| // The super class was verified ahead of entering initializing, we should only be here if |
| // the super class became erroneous due to initialization. |
| CHECK(handle_scope_super->IsErroneous() && self->IsExceptionPending()) |
| << "Super class initialization failed for " |
| << PrettyDescriptor(handle_scope_super.Get()) |
| << " that has unexpected status " << handle_scope_super->GetStatus() |
| << "\nPending exception:\n" |
| << (self->GetException(nullptr) != nullptr ? self->GetException(nullptr)->Dump() : ""); |
| ObjectLock<mirror::Class> lock(self, klass); |
| // Initialization failed because the super-class is erroneous. |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return false; |
| } |
| } |
| } |
| |
| if (klass->NumStaticFields() > 0) { |
| const DexFile::ClassDef* dex_class_def = klass->GetClassDef(); |
| CHECK(dex_class_def != nullptr); |
| const DexFile& dex_file = klass->GetDexFile(); |
| StackHandleScope<3> hs(self); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader())); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); |
| EncodedStaticFieldValueIterator value_it(dex_file, &dex_cache, &class_loader, |
| this, *dex_class_def); |
| const byte* class_data = dex_file.GetClassData(*dex_class_def); |
| ClassDataItemIterator field_it(dex_file, class_data); |
| if (value_it.HasNext()) { |
| DCHECK(field_it.HasNextStaticField()); |
| CHECK(can_init_statics); |
| for ( ; value_it.HasNext(); value_it.Next(), field_it.Next()) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ArtField> field(hs.NewHandle( |
| ResolveField(dex_file, field_it.GetMemberIndex(), dex_cache, class_loader, true))); |
| if (Runtime::Current()->IsActiveTransaction()) { |
| value_it.ReadValueToField<true>(field); |
| } else { |
| value_it.ReadValueToField<false>(field); |
| } |
| DCHECK(!value_it.HasNext() || field_it.HasNextStaticField()); |
| } |
| } |
| } |
| |
| mirror::ArtMethod* clinit = klass->FindClassInitializer(); |
| if (clinit != nullptr) { |
| CHECK(can_init_statics); |
| JValue result; |
| clinit->Invoke(self, nullptr, 0, &result, "V"); |
| } |
| |
| self->AllowThreadSuspension(); |
| uint64_t t1 = NanoTime(); |
| |
| bool success = true; |
| { |
| ObjectLock<mirror::Class> lock(self, klass); |
| |
| if (self->IsExceptionPending()) { |
| WrapExceptionInInitializer(); |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| success = false; |
| } else { |
| RuntimeStats* global_stats = Runtime::Current()->GetStats(); |
| RuntimeStats* thread_stats = self->GetStats(); |
| ++global_stats->class_init_count; |
| ++thread_stats->class_init_count; |
| global_stats->class_init_time_ns += (t1 - t0); |
| thread_stats->class_init_time_ns += (t1 - t0); |
| // Set the class as initialized except if failed to initialize static fields. |
| klass->SetStatus(mirror::Class::kStatusInitialized, self); |
| if (VLOG_IS_ON(class_linker)) { |
| std::string temp; |
| LOG(INFO) << "Initialized class " << klass->GetDescriptor(&temp) << " from " << |
| klass->GetLocation(); |
| } |
| // Opportunistically set static method trampolines to their destination. |
| FixupStaticTrampolines(klass.Get()); |
| } |
| } |
| return success; |
| } |
| |
| bool ClassLinker::WaitForInitializeClass(Handle<mirror::Class> klass, Thread* self, |
| ObjectLock<mirror::Class>& lock) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| while (true) { |
| self->AssertNoPendingException(); |
| CHECK(!klass->IsInitialized()); |
| lock.WaitIgnoringInterrupts(); |
| |
| // When we wake up, repeat the test for init-in-progress. If |
| // there's an exception pending (only possible if |
| // "interruptShouldThrow" was set), bail out. |
| if (self->IsExceptionPending()) { |
| WrapExceptionInInitializer(); |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return false; |
| } |
| // Spurious wakeup? Go back to waiting. |
| if (klass->GetStatus() == mirror::Class::kStatusInitializing) { |
| continue; |
| } |
| if (klass->GetStatus() == mirror::Class::kStatusVerified && Runtime::Current()->IsCompiler()) { |
| // Compile time initialization failed. |
| return false; |
| } |
| if (klass->IsErroneous()) { |
| // The caller wants an exception, but it was thrown in a |
| // different thread. Synthesize one here. |
| ThrowNoClassDefFoundError("<clinit> failed for class %s; see exception in other thread", |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| if (klass->IsInitialized()) { |
| return true; |
| } |
| LOG(FATAL) << "Unexpected class status. " << PrettyClass(klass.Get()) << " is " |
| << klass->GetStatus(); |
| } |
| UNREACHABLE(); |
| } |
| |
| bool ClassLinker::ValidateSuperClassDescriptors(Handle<mirror::Class> klass) { |
| if (klass->IsInterface()) { |
| return true; |
| } |
| // Begin with the methods local to the superclass. |
| StackHandleScope<2> hs(Thread::Current()); |
| MutableMethodHelper mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| MutableMethodHelper super_mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| if (klass->HasSuperClass() && |
| klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) { |
| for (int i = klass->GetSuperClass()->GetVTableLength() - 1; i >= 0; --i) { |
| mh.ChangeMethod(klass->GetVTableEntry(i)); |
| super_mh.ChangeMethod(klass->GetSuperClass()->GetVTableEntry(i)); |
| if (mh.GetMethod() != super_mh.GetMethod() && |
| !mh.HasSameSignatureWithDifferentClassLoaders(&super_mh)) { |
| ThrowLinkageError(klass.Get(), |
| "Class %s method %s resolves differently in superclass %s", |
| PrettyDescriptor(klass.Get()).c_str(), |
| PrettyMethod(mh.GetMethod()).c_str(), |
| PrettyDescriptor(klass->GetSuperClass()).c_str()); |
| return false; |
| } |
| } |
| } |
| for (int32_t i = 0; i < klass->GetIfTableCount(); ++i) { |
| if (klass->GetClassLoader() != klass->GetIfTable()->GetInterface(i)->GetClassLoader()) { |
| uint32_t num_methods = klass->GetIfTable()->GetInterface(i)->NumVirtualMethods(); |
| for (uint32_t j = 0; j < num_methods; ++j) { |
| mh.ChangeMethod(klass->GetIfTable()->GetMethodArray(i)->GetWithoutChecks(j)); |
| super_mh.ChangeMethod(klass->GetIfTable()->GetInterface(i)->GetVirtualMethod(j)); |
| if (mh.GetMethod() != super_mh.GetMethod() && |
| !mh.HasSameSignatureWithDifferentClassLoaders(&super_mh)) { |
| ThrowLinkageError(klass.Get(), |
| "Class %s method %s resolves differently in interface %s", |
| PrettyDescriptor(klass.Get()).c_str(), |
| PrettyMethod(mh.GetMethod()).c_str(), |
| PrettyDescriptor(klass->GetIfTable()->GetInterface(i)).c_str()); |
| return false; |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| bool ClassLinker::EnsureInitialized(Thread* self, Handle<mirror::Class> c, bool can_init_fields, |
| bool can_init_parents) { |
| DCHECK(c.Get() != nullptr); |
| if (c->IsInitialized()) { |
| EnsurePreverifiedMethods(c); |
| return true; |
| } |
| const bool success = InitializeClass(self, c, can_init_fields, can_init_parents); |
| if (!success) { |
| if (can_init_fields && can_init_parents) { |
| CHECK(self->IsExceptionPending()) << PrettyClass(c.Get()); |
| } |
| } else { |
| self->AssertNoPendingException(); |
| } |
| return success; |
| } |
| |
| void ClassLinker::FixupTemporaryDeclaringClass(mirror::Class* temp_class, mirror::Class* new_class) { |
| mirror::ObjectArray<mirror::ArtField>* fields = new_class->GetIFields(); |
| if (fields != nullptr) { |
| for (int index = 0; index < fields->GetLength(); index ++) { |
| if (fields->Get(index)->GetDeclaringClass() == temp_class) { |
| fields->Get(index)->SetDeclaringClass(new_class); |
| } |
| } |
| } |
| |
| fields = new_class->GetSFields(); |
| if (fields != nullptr) { |
| for (int index = 0; index < fields->GetLength(); index ++) { |
| if (fields->Get(index)->GetDeclaringClass() == temp_class) { |
| fields->Get(index)->SetDeclaringClass(new_class); |
| } |
| } |
| } |
| |
| mirror::ObjectArray<mirror::ArtMethod>* methods = new_class->GetDirectMethods(); |
| if (methods != nullptr) { |
| for (int index = 0; index < methods->GetLength(); index ++) { |
| if (methods->Get(index)->GetDeclaringClass() == temp_class) { |
| methods->Get(index)->SetDeclaringClass(new_class); |
| } |
| } |
| } |
| |
| methods = new_class->GetVirtualMethods(); |
| if (methods != nullptr) { |
| for (int index = 0; index < methods->GetLength(); index ++) { |
| if (methods->Get(index)->GetDeclaringClass() == temp_class) { |
| methods->Get(index)->SetDeclaringClass(new_class); |
| } |
| } |
| } |
| } |
| |
| bool ClassLinker::LinkClass(Thread* self, const char* descriptor, Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces, |
| mirror::Class** new_class) { |
| CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus()); |
| |
| if (!LinkSuperClass(klass)) { |
| return false; |
| } |
| if (!LinkMethods(self, klass, interfaces)) { |
| return false; |
| } |
| if (!LinkInstanceFields(self, klass)) { |
| return false; |
| } |
| size_t class_size; |
| if (!LinkStaticFields(self, klass, &class_size)) { |
| return false; |
| } |
| CreateReferenceInstanceOffsets(klass); |
| CHECK_EQ(mirror::Class::kStatusLoaded, klass->GetStatus()); |
| |
| if (!klass->IsTemp() || (!init_done_ && klass->GetClassSize() == class_size)) { |
| // We don't need to retire this class as it has no embedded tables or it was created the |
| // correct size during class linker initialization. |
| CHECK_EQ(klass->GetClassSize(), class_size) << PrettyDescriptor(klass.Get()); |
| |
| if (klass->ShouldHaveEmbeddedImtAndVTable()) { |
| klass->PopulateEmbeddedImtAndVTable(); |
| } |
| |
| // This will notify waiters on klass that saw the not yet resolved |
| // class in the class_table_ during EnsureResolved. |
| klass->SetStatus(mirror::Class::kStatusResolved, self); |
| *new_class = klass.Get(); |
| } else { |
| CHECK(!klass->IsResolved()); |
| // Retire the temporary class and create the correctly sized resolved class. |
| *new_class = klass->CopyOf(self, class_size); |
| if (UNLIKELY(*new_class == nullptr)) { |
| CHECK(self->IsExceptionPending()); // Expect an OOME. |
| klass->SetStatus(mirror::Class::kStatusError, self); |
| return false; |
| } |
| |
| CHECK_EQ((*new_class)->GetClassSize(), class_size); |
| StackHandleScope<1> hs(self); |
| auto new_class_h = hs.NewHandleWrapper<mirror::Class>(new_class); |
| ObjectLock<mirror::Class> lock(self, new_class_h); |
| |
| FixupTemporaryDeclaringClass(klass.Get(), new_class_h.Get()); |
| |
| mirror::Class* existing = UpdateClass(descriptor, new_class_h.Get(), Hash(descriptor)); |
| CHECK(existing == nullptr || existing == klass.Get()); |
| |
| // This will notify waiters on temp class that saw the not yet resolved class in the |
| // class_table_ during EnsureResolved. |
| klass->SetStatus(mirror::Class::kStatusRetired, self); |
| |
| CHECK_EQ(new_class_h->GetStatus(), mirror::Class::kStatusResolving); |
| // This will notify waiters on new_class that saw the not yet resolved |
| // class in the class_table_ during EnsureResolved. |
| new_class_h->SetStatus(mirror::Class::kStatusResolved, self); |
| } |
| return true; |
| } |
| |
| bool ClassLinker::LoadSuperAndInterfaces(Handle<mirror::Class> klass, const DexFile& dex_file) { |
| CHECK_EQ(mirror::Class::kStatusIdx, klass->GetStatus()); |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(klass->GetDexClassDefIndex()); |
| uint16_t super_class_idx = class_def.superclass_idx_; |
| if (super_class_idx != DexFile::kDexNoIndex16) { |
| mirror::Class* super_class = ResolveType(dex_file, super_class_idx, klass.Get()); |
| if (super_class == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return false; |
| } |
| // Verify |
| if (!klass->CanAccess(super_class)) { |
| ThrowIllegalAccessError(klass.Get(), "Class %s extended by class %s is inaccessible", |
| PrettyDescriptor(super_class).c_str(), |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| CHECK(super_class->IsResolved()); |
| klass->SetSuperClass(super_class); |
| } |
| const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(class_def); |
| if (interfaces != nullptr) { |
| for (size_t i = 0; i < interfaces->Size(); i++) { |
| uint16_t idx = interfaces->GetTypeItem(i).type_idx_; |
| mirror::Class* interface = ResolveType(dex_file, idx, klass.Get()); |
| if (interface == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return false; |
| } |
| // Verify |
| if (!klass->CanAccess(interface)) { |
| // TODO: the RI seemed to ignore this in my testing. |
| ThrowIllegalAccessError(klass.Get(), "Interface %s implemented by class %s is inaccessible", |
| PrettyDescriptor(interface).c_str(), |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| } |
| } |
| // Mark the class as loaded. |
| klass->SetStatus(mirror::Class::kStatusLoaded, nullptr); |
| return true; |
| } |
| |
| bool ClassLinker::LinkSuperClass(Handle<mirror::Class> klass) { |
| CHECK(!klass->IsPrimitive()); |
| mirror::Class* super = klass->GetSuperClass(); |
| if (klass.Get() == GetClassRoot(kJavaLangObject)) { |
| if (super != nullptr) { |
| ThrowClassFormatError(klass.Get(), "java.lang.Object must not have a superclass"); |
| return false; |
| } |
| return true; |
| } |
| if (super == nullptr) { |
| ThrowLinkageError(klass.Get(), "No superclass defined for class %s", |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| // Verify |
| if (super->IsFinal() || super->IsInterface()) { |
| ThrowIncompatibleClassChangeError(klass.Get(), "Superclass %s of %s is %s", |
| PrettyDescriptor(super).c_str(), |
| PrettyDescriptor(klass.Get()).c_str(), |
| super->IsFinal() ? "declared final" : "an interface"); |
| return false; |
| } |
| if (!klass->CanAccess(super)) { |
| ThrowIllegalAccessError(klass.Get(), "Superclass %s is inaccessible to class %s", |
| PrettyDescriptor(super).c_str(), |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| |
| // Inherit kAccClassIsFinalizable from the superclass in case this |
| // class doesn't override finalize. |
| if (super->IsFinalizable()) { |
| klass->SetFinalizable(); |
| } |
| |
| // Inherit reference flags (if any) from the superclass. |
| int reference_flags = (super->GetAccessFlags() & kAccReferenceFlagsMask); |
| if (reference_flags != 0) { |
| klass->SetAccessFlags(klass->GetAccessFlags() | reference_flags); |
| } |
| // Disallow custom direct subclasses of java.lang.ref.Reference. |
| if (init_done_ && super == GetClassRoot(kJavaLangRefReference)) { |
| ThrowLinkageError(klass.Get(), |
| "Class %s attempts to subclass java.lang.ref.Reference, which is not allowed", |
| PrettyDescriptor(klass.Get()).c_str()); |
| return false; |
| } |
| |
| if (kIsDebugBuild) { |
| // Ensure super classes are fully resolved prior to resolving fields.. |
| while (super != nullptr) { |
| CHECK(super->IsResolved()); |
| super = super->GetSuperClass(); |
| } |
| } |
| return true; |
| } |
| |
| // Populate the class vtable and itable. Compute return type indices. |
| bool ClassLinker::LinkMethods(Thread* self, Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces) { |
| self->AllowThreadSuspension(); |
| if (klass->IsInterface()) { |
| // No vtable. |
| size_t count = klass->NumVirtualMethods(); |
| if (!IsUint(16, count)) { |
| ThrowClassFormatError(klass.Get(), "Too many methods on interface: %zd", count); |
| return false; |
| } |
| for (size_t i = 0; i < count; ++i) { |
| klass->GetVirtualMethodDuringLinking(i)->SetMethodIndex(i); |
| } |
| // Link interface method tables |
| return LinkInterfaceMethods(klass, interfaces); |
| } else { |
| // Link virtual and interface method tables |
| return LinkVirtualMethods(self, klass) && LinkInterfaceMethods(klass, interfaces); |
| } |
| return true; |
| } |
| |
| bool ClassLinker::LinkVirtualMethods(Thread* self, Handle<mirror::Class> klass) { |
| if (klass->HasSuperClass()) { |
| uint32_t max_count = klass->NumVirtualMethods() + |
| klass->GetSuperClass()->GetVTableLength(); |
| size_t actual_count = klass->GetSuperClass()->GetVTableLength(); |
| CHECK_LE(actual_count, max_count); |
| StackHandleScope<4> hs(self); |
| Handle<mirror::Class> super_class(hs.NewHandle(klass->GetSuperClass())); |
| MutableHandle<mirror::ObjectArray<mirror::ArtMethod>> vtable; |
| if (super_class->ShouldHaveEmbeddedImtAndVTable()) { |
| vtable = hs.NewHandle(AllocArtMethodArray(self, max_count)); |
| if (UNLIKELY(vtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| int len = super_class->GetVTableLength(); |
| for (int i = 0; i < len; i++) { |
| vtable->Set<false>(i, super_class->GetVTableEntry(i)); |
| } |
| } else { |
| CHECK(super_class->GetVTable() != nullptr) << PrettyClass(super_class.Get()); |
| vtable = hs.NewHandle(super_class->GetVTable()->CopyOf(self, max_count)); |
| if (UNLIKELY(vtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| } |
| |
| // See if any of our virtual methods override the superclass. |
| MutableMethodHelper local_mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| MutableMethodHelper super_mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| mirror::ArtMethod* local_method = klass->GetVirtualMethodDuringLinking(i); |
| local_mh.ChangeMethod(local_method); |
| size_t j = 0; |
| for (; j < actual_count; ++j) { |
| mirror::ArtMethod* super_method = vtable->Get(j); |
| super_mh.ChangeMethod(super_method); |
| if (local_mh.HasSameNameAndSignature(&super_mh)) { |
| if (klass->CanAccessMember(super_method->GetDeclaringClass(), |
| super_method->GetAccessFlags())) { |
| if (super_method->IsFinal()) { |
| ThrowLinkageError(klass.Get(), "Method %s overrides final method in class %s", |
| PrettyMethod(local_method).c_str(), |
| super_method->GetDeclaringClassDescriptor()); |
| return false; |
| } |
| vtable->Set<false>(j, local_method); |
| local_method->SetMethodIndex(j); |
| break; |
| } else { |
| LOG(WARNING) << "Before Android 4.1, method " << PrettyMethod(local_method) |
| << " would have incorrectly overridden the package-private method in " |
| << PrettyDescriptor(super_method->GetDeclaringClassDescriptor()); |
| } |
| } |
| } |
| if (j == actual_count) { |
| // Not overriding, append. |
| vtable->Set<false>(actual_count, local_method); |
| local_method->SetMethodIndex(actual_count); |
| actual_count += 1; |
| } |
| } |
| if (!IsUint(16, actual_count)) { |
| ThrowClassFormatError(klass.Get(), "Too many methods defined on class: %zd", actual_count); |
| return false; |
| } |
| // Shrink vtable if possible |
| CHECK_LE(actual_count, max_count); |
| if (actual_count < max_count) { |
| vtable.Assign(vtable->CopyOf(self, actual_count)); |
| if (UNLIKELY(vtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| } |
| klass->SetVTable(vtable.Get()); |
| } else { |
| CHECK_EQ(klass.Get(), GetClassRoot(kJavaLangObject)); |
| uint32_t num_virtual_methods = klass->NumVirtualMethods(); |
| if (!IsUint(16, num_virtual_methods)) { |
| ThrowClassFormatError(klass.Get(), "Too many methods: %d", num_virtual_methods); |
| return false; |
| } |
| StackHandleScope<1> hs(self); |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> |
| vtable(hs.NewHandle(AllocArtMethodArray(self, num_virtual_methods))); |
| if (UNLIKELY(vtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| for (size_t i = 0; i < num_virtual_methods; ++i) { |
| mirror::ArtMethod* virtual_method = klass->GetVirtualMethodDuringLinking(i); |
| vtable->Set<false>(i, virtual_method); |
| virtual_method->SetMethodIndex(i & 0xFFFF); |
| } |
| klass->SetVTable(vtable.Get()); |
| } |
| return true; |
| } |
| |
| bool ClassLinker::LinkInterfaceMethods(Handle<mirror::Class> klass, |
| Handle<mirror::ObjectArray<mirror::Class>> interfaces) { |
| Thread* const self = Thread::Current(); |
| Runtime* const runtime = Runtime::Current(); |
| // Set the imt table to be all conflicts by default. |
| klass->SetImTable(runtime->GetDefaultImt()); |
| size_t super_ifcount; |
| if (klass->HasSuperClass()) { |
| super_ifcount = klass->GetSuperClass()->GetIfTableCount(); |
| } else { |
| super_ifcount = 0; |
| } |
| uint32_t num_interfaces = |
| interfaces.Get() == nullptr ? klass->NumDirectInterfaces() : interfaces->GetLength(); |
| size_t ifcount = super_ifcount + num_interfaces; |
| for (size_t i = 0; i < num_interfaces; i++) { |
| mirror::Class* interface = |
| interfaces.Get() == nullptr ? mirror::Class::GetDirectInterface(self, klass, i) : |
| interfaces->Get(i); |
| ifcount += interface->GetIfTableCount(); |
| } |
| if (ifcount == 0) { |
| // Class implements no interfaces. |
| DCHECK_EQ(klass->GetIfTableCount(), 0); |
| DCHECK(klass->GetIfTable() == nullptr); |
| return true; |
| } |
| if (ifcount == super_ifcount) { |
| // Class implements same interfaces as parent, are any of these not marker interfaces? |
| bool has_non_marker_interface = false; |
| mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable(); |
| for (size_t i = 0; i < ifcount; ++i) { |
| if (super_iftable->GetMethodArrayCount(i) > 0) { |
| has_non_marker_interface = true; |
| break; |
| } |
| } |
| if (!has_non_marker_interface) { |
| // Class just inherits marker interfaces from parent so recycle parent's iftable. |
| klass->SetIfTable(super_iftable); |
| return true; |
| } |
| } |
| StackHandleScope<5> hs(self); |
| MutableHandle<mirror::IfTable> iftable(hs.NewHandle(AllocIfTable(self, ifcount))); |
| if (UNLIKELY(iftable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| if (super_ifcount != 0) { |
| mirror::IfTable* super_iftable = klass->GetSuperClass()->GetIfTable(); |
| for (size_t i = 0; i < super_ifcount; i++) { |
| mirror::Class* super_interface = super_iftable->GetInterface(i); |
| iftable->SetInterface(i, super_interface); |
| } |
| } |
| self->AllowThreadSuspension(); |
| // Flatten the interface inheritance hierarchy. |
| size_t idx = super_ifcount; |
| for (size_t i = 0; i < num_interfaces; i++) { |
| mirror::Class* interface = |
| interfaces.Get() == nullptr ? mirror::Class::GetDirectInterface(self, klass, i) : |
| interfaces->Get(i); |
| DCHECK(interface != nullptr); |
| if (!interface->IsInterface()) { |
| std::string temp; |
| ThrowIncompatibleClassChangeError(klass.Get(), "Class %s implements non-interface class %s", |
| PrettyDescriptor(klass.Get()).c_str(), |
| PrettyDescriptor(interface->GetDescriptor(&temp)).c_str()); |
| return false; |
| } |
| // Check if interface is already in iftable |
| bool duplicate = false; |
| for (size_t j = 0; j < idx; j++) { |
| mirror::Class* existing_interface = iftable->GetInterface(j); |
| if (existing_interface == interface) { |
| duplicate = true; |
| break; |
| } |
| } |
| if (!duplicate) { |
| // Add this non-duplicate interface. |
| iftable->SetInterface(idx++, interface); |
| // Add this interface's non-duplicate super-interfaces. |
| for (int32_t j = 0; j < interface->GetIfTableCount(); j++) { |
| mirror::Class* super_interface = interface->GetIfTable()->GetInterface(j); |
| bool super_duplicate = false; |
| for (size_t k = 0; k < idx; k++) { |
| mirror::Class* existing_interface = iftable->GetInterface(k); |
| if (existing_interface == super_interface) { |
| super_duplicate = true; |
| break; |
| } |
| } |
| if (!super_duplicate) { |
| iftable->SetInterface(idx++, super_interface); |
| } |
| } |
| } |
| } |
| self->AllowThreadSuspension(); |
| // Shrink iftable in case duplicates were found |
| if (idx < ifcount) { |
| iftable.Assign(down_cast<mirror::IfTable*>(iftable->CopyOf(self, idx * mirror::IfTable::kMax))); |
| if (UNLIKELY(iftable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| ifcount = idx; |
| } else { |
| CHECK_EQ(idx, ifcount); |
| } |
| klass->SetIfTable(iftable.Get()); |
| |
| // If we're an interface, we don't need the vtable pointers, so we're done. |
| if (klass->IsInterface()) { |
| return true; |
| } |
| self->AllowThreadSuspension(); |
| // Allocate imtable |
| bool imtable_changed = false; |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable( |
| hs.NewHandle(AllocArtMethodArray(self, mirror::Class::kImtSize))); |
| if (UNLIKELY(imtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| MutableMethodHelper interface_mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| MutableMethodHelper vtable_mh(hs.NewHandle<mirror::ArtMethod>(nullptr)); |
| size_t max_miranda_methods = 0; // The max size of miranda_list. |
| for (size_t i = 0; i < ifcount; ++i) { |
| max_miranda_methods += iftable->GetInterface(i)->NumVirtualMethods(); |
| } |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> |
| miranda_list(hs.NewHandle(AllocArtMethodArray(self, max_miranda_methods))); |
| size_t miranda_list_size = 0; // The current size of miranda_list. |
| for (size_t i = 0; i < ifcount; ++i) { |
| self->AllowThreadSuspension(); |
| size_t num_methods = iftable->GetInterface(i)->NumVirtualMethods(); |
| if (num_methods > 0) { |
| StackHandleScope<2> hs(self); |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> |
| method_array(hs.NewHandle(AllocArtMethodArray(self, num_methods))); |
| if (UNLIKELY(method_array.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| iftable->SetMethodArray(i, method_array.Get()); |
| Handle<mirror::ObjectArray<mirror::ArtMethod>> vtable( |
| hs.NewHandle(klass->GetVTableDuringLinking())); |
| for (size_t j = 0; j < num_methods; ++j) { |
| interface_mh.ChangeMethod(iftable->GetInterface(i)->GetVirtualMethod(j)); |
| int32_t k; |
| // For each method listed in the interface's method list, find the |
| // matching method in our class's method list. We want to favor the |
| // subclass over the superclass, which just requires walking |
| // back from the end of the vtable. (This only matters if the |
| // superclass defines a private method and this class redefines |
| // it -- otherwise it would use the same vtable slot. In .dex files |
| // those don't end up in the virtual method table, so it shouldn't |
| // matter which direction we go. We walk it backward anyway.) |
| for (k = vtable->GetLength() - 1; k >= 0; --k) { |
| vtable_mh.ChangeMethod(vtable->Get(k)); |
| if (interface_mh.HasSameNameAndSignature(&vtable_mh)) { |
| if (!vtable_mh.Get()->IsAbstract() && !vtable_mh.Get()->IsPublic()) { |
| ThrowIllegalAccessError( |
| klass.Get(), |
| "Method '%s' implementing interface method '%s' is not public", |
| PrettyMethod(vtable_mh.Get()).c_str(), |
| PrettyMethod(interface_mh.Get()).c_str()); |
| return false; |
| } |
| method_array->Set<false>(j, vtable_mh.Get()); |
| // Place method in imt if entry is empty, place conflict otherwise. |
| uint32_t imt_index = interface_mh.Get()->GetDexMethodIndex() % mirror::Class::kImtSize; |
| if (imtable->Get(imt_index) == nullptr) { |
| imtable->Set<false>(imt_index, vtable_mh.Get()); |
| imtable_changed = true; |
| } else { |
| imtable->Set<false>(imt_index, runtime->GetImtConflictMethod()); |
| } |
| break; |
| } |
| } |
| if (k < 0) { |
| StackHandleScope<1> hs(self); |
| auto miranda_method = hs.NewHandle<mirror::ArtMethod>(nullptr); |
| for (size_t l = 0; l < miranda_list_size; ++l) { |
| mirror::ArtMethod* mir_method = miranda_list->Get(l); |
| DCHECK(mir_method != nullptr); |
| vtable_mh.ChangeMethod(mir_method); |
| if (interface_mh.HasSameNameAndSignature(&vtable_mh)) { |
| miranda_method.Assign(mir_method); |
| break; |
| } |
| } |
| if (miranda_method.Get() == nullptr) { |
| // Point the interface table at a phantom slot. |
| miranda_method.Assign(down_cast<mirror::ArtMethod*>(interface_mh.Get()->Clone(self))); |
| if (UNLIKELY(miranda_method.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| DCHECK_LT(miranda_list_size, max_miranda_methods); |
| miranda_list->Set<false>(miranda_list_size++, miranda_method.Get()); |
| } |
| method_array->Set<false>(j, miranda_method.Get()); |
| } |
| } |
| } |
| } |
| if (imtable_changed) { |
| // Fill in empty entries in interface method table with conflict. |
| mirror::ArtMethod* imt_conflict_method = runtime->GetImtConflictMethod(); |
| for (size_t i = 0; i < mirror::Class::kImtSize; i++) { |
| if (imtable->Get(i) == nullptr) { |
| imtable->Set<false>(i, imt_conflict_method); |
| } |
| } |
| klass->SetImTable(imtable.Get()); |
| } |
| if (miranda_list_size > 0) { |
| int old_method_count = klass->NumVirtualMethods(); |
| int new_method_count = old_method_count + miranda_list_size; |
| mirror::ObjectArray<mirror::ArtMethod>* virtuals; |
| if (old_method_count == 0) { |
| virtuals = AllocArtMethodArray(self, new_method_count); |
| } else { |
| virtuals = klass->GetVirtualMethods()->CopyOf(self, new_method_count); |
| } |
| if (UNLIKELY(virtuals == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| klass->SetVirtualMethods(virtuals); |
| |
| StackHandleScope<1> hs(self); |
| MutableHandle<mirror::ObjectArray<mirror::ArtMethod>> vtable( |
| hs.NewHandle(klass->GetVTableDuringLinking())); |
| CHECK(vtable.Get() != nullptr); |
| int old_vtable_count = vtable->GetLength(); |
| int new_vtable_count = old_vtable_count + miranda_list_size; |
| vtable.Assign(vtable->CopyOf(self, new_vtable_count)); |
| if (UNLIKELY(vtable.Get() == nullptr)) { |
| CHECK(self->IsExceptionPending()); // OOME. |
| return false; |
| } |
| for (size_t i = 0; i < miranda_list_size; ++i) { |
| mirror::ArtMethod* method = miranda_list->Get(i); |
| // Leave the declaring class alone as type indices are relative to it |
| method->SetAccessFlags(method->GetAccessFlags() | kAccMiranda); |
| method->SetMethodIndex(0xFFFF & (old_vtable_count + i)); |
| klass->SetVirtualMethod(old_method_count + i, method); |
| vtable->Set<false>(old_vtable_count + i, method); |
| } |
| // TODO: do not assign to the vtable field until it is fully constructed. |
| klass->SetVTable(vtable.Get()); |
| } |
| |
| mirror::ObjectArray<mirror::ArtMethod>* vtable = klass->GetVTableDuringLinking(); |
| for (int i = 0; i < vtable->GetLength(); ++i) { |
| CHECK(vtable->Get(i) != nullptr); |
| } |
| |
| self->AllowThreadSuspension(); |
| |
| return true; |
| } |
| |
| bool ClassLinker::LinkInstanceFields(Thread* self, Handle<mirror::Class> klass) { |
| CHECK(klass.Get() != nullptr); |
| return LinkFields(self, klass, false, nullptr); |
| } |
| |
| bool ClassLinker::LinkStaticFields(Thread* self, Handle<mirror::Class> klass, size_t* class_size) { |
| CHECK(klass.Get() != nullptr); |
| return LinkFields(self, klass, true, class_size); |
| } |
| |
| struct LinkFieldsComparator { |
| explicit LinkFieldsComparator() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| } |
| // No thread safety analysis as will be called from STL. Checked lock held in constructor. |
| bool operator()(mirror::ArtField* field1, mirror::ArtField* field2) |
| NO_THREAD_SAFETY_ANALYSIS { |
| // First come reference fields, then 64-bit, then 32-bit, and then 16-bit, then finally 8-bit. |
| Primitive::Type type1 = field1->GetTypeAsPrimitiveType(); |
| Primitive::Type type2 = field2->GetTypeAsPrimitiveType(); |
| if (type1 != type2) { |
| bool is_primitive1 = type1 != Primitive::kPrimNot; |
| bool is_primitive2 = type2 != Primitive::kPrimNot; |
| if (type1 != type2) { |
| if (is_primitive1 && is_primitive2) { |
| // Larger primitive types go first. |
| return Primitive::ComponentSize(type1) > Primitive::ComponentSize(type2); |
| } else { |
| // Reference always goes first. |
| return !is_primitive1; |
| } |
| } |
| } |
| // same basic group? then sort by string. |
| return strcmp(field1->GetName(), field2->GetName()) < 0; |
| } |
| }; |
| |
| bool ClassLinker::LinkFields(Thread* self, Handle<mirror::Class> klass, bool is_static, |
| size_t* class_size) { |
| self->AllowThreadSuspension(); |
| size_t num_fields = |
| is_static ? klass->NumStaticFields() : klass->NumInstanceFields(); |
| |
| mirror::ObjectArray<mirror::ArtField>* fields = |
| is_static ? klass->GetSFields() : klass->GetIFields(); |
| |
| // Initialize field_offset |
| MemberOffset field_offset(0); |
| if (is_static) { |
| uint32_t base = sizeof(mirror::Class); // Static fields come after the class. |
| if (klass->ShouldHaveEmbeddedImtAndVTable()) { |
| // Static fields come after the embedded tables. |
| base = mirror::Class::ComputeClassSize(true, klass->GetVTableDuringLinking()->GetLength(), |
| 0, 0, 0, 0, 0); |
| } |
| field_offset = MemberOffset(base); |
| } else { |
| mirror::Class* super_class = klass->GetSuperClass(); |
| if (super_class != nullptr) { |
| CHECK(super_class->IsResolved()) |
| << PrettyClass(klass.Get()) << " " << PrettyClass(super_class); |
| field_offset = MemberOffset(super_class->GetObjectSize()); |
| } |
| } |
| |
| CHECK_EQ(num_fields == 0, fields == nullptr) << PrettyClass(klass.Get()); |
| |
| // we want a relatively stable order so that adding new fields |
| // minimizes disruption of C++ version such as Class and Method. |
| std::deque<mirror::ArtField*> grouped_and_sorted_fields; |
| const char* old_no_suspend_cause = self->StartAssertNoThreadSuspension( |
| "Naked ArtField references in deque"); |
| for (size_t i = 0; i < num_fields; i++) { |
| mirror::ArtField* f = fields->Get(i); |
| CHECK(f != nullptr) << PrettyClass(klass.Get()); |
| grouped_and_sorted_fields.push_back(f); |
| } |
| std::sort(grouped_and_sorted_fields.begin(), grouped_and_sorted_fields.end(), |
| LinkFieldsComparator()); |
| |
| // References should be at the front. |
| size_t current_field = 0; |
| size_t num_reference_fields = 0; |
| FieldGaps gaps; |
| |
| for (; current_field < num_fields; current_field++) { |
| mirror::ArtField* field = grouped_and_sorted_fields.front(); |
| Primitive::Type type = field->GetTypeAsPrimitiveType(); |
| bool isPrimitive = type != Primitive::kPrimNot; |
| if (isPrimitive) { |
| break; // past last reference, move on to the next phase |
| } |
| if (UNLIKELY(!IsAligned<4>(field_offset.Uint32Value()))) { |
| MemberOffset old_offset = field_offset; |
| field_offset = MemberOffset(RoundUp(field_offset.Uint32Value(), 4)); |
| AddFieldGap(old_offset.Uint32Value(), field_offset.Uint32Value(), &gaps); |
| } |
| DCHECK(IsAligned<4>(field_offset.Uint32Value())); |
| grouped_and_sorted_fields.pop_front(); |
| num_reference_fields++; |
| fields->Set<false>(current_field, field); |
| field->SetOffset(field_offset); |
| field_offset = MemberOffset(field_offset.Uint32Value() + sizeof(uint32_t)); |
| } |
| // Gaps are stored as a max heap which means that we must shuffle from largest to smallest |
| // otherwise we could end up with suboptimal gap fills. |
| ShuffleForward<8>(num_fields, ¤t_field, &field_offset, |
| fields, &grouped_and_sorted_fields, &gaps); |
| ShuffleForward<4>(num_fields, ¤t_field, &field_offset, |
| fields, &grouped_and_sorted_fields, &gaps); |
| ShuffleForward<2>(num_fields, ¤t_field, &field_offset, |
| fields, &grouped_and_sorted_fields, &gaps); |
| ShuffleForward<1>(num_fields, ¤t_field, &field_offset, |
| fields, &grouped_and_sorted_fields, &gaps); |
| CHECK(grouped_and_sorted_fields.empty()) << "Missed " << grouped_and_sorted_fields.size() << |
| " fields."; |
| self->EndAssertNoThreadSuspension(old_no_suspend_cause); |
| |
| // We lie to the GC about the java.lang.ref.Reference.referent field, so it doesn't scan it. |
| if (!is_static && klass->DescriptorEquals("Ljava/lang/ref/Reference;")) { |
| // We know there are no non-reference fields in the Reference classes, and we know |
| // that 'referent' is alphabetically last, so this is easy... |
| CHECK_EQ(num_reference_fields, num_fields) << PrettyClass(klass.Get()); |
| CHECK_STREQ(fields->Get(num_fields - 1)->GetName(), "referent") << PrettyClass(klass.Get()); |
| --num_reference_fields; |
| } |
| |
| if (kIsDebugBuild) { |
| // Make sure that all reference fields appear before |
| // non-reference fields, and all double-wide fields are aligned. |
| bool seen_non_ref = false; |
| for (size_t i = 0; i < num_fields; i++) { |
| mirror::ArtField* field = fields->Get(i); |
| if (false) { // enable to debug field layout |
| LOG(INFO) << "LinkFields: " << (is_static ? "static" : "instance") |
| << " class=" << PrettyClass(klass.Get()) |
| << " field=" << PrettyField(field) |
| << " offset=" |
| << field->GetField32(MemberOffset(mirror::ArtField::OffsetOffset())); |
| } |
| Primitive::Type type = field->GetTypeAsPrimitiveType(); |
| bool is_primitive = type != Primitive::kPrimNot; |
| if (klass->DescriptorEquals("Ljava/lang/ref/Reference;") && |
| strcmp("referent", field->GetName()) == 0) { |
| is_primitive = true; // We lied above, so we have to expect a lie here. |
| } |
| if (is_primitive) { |
| if (!seen_non_ref) { |
| seen_non_ref = true; |
| DCHECK_EQ(num_reference_fields, i) << PrettyField(field); |
| } |
| } else { |
| DCHECK(!seen_non_ref) << PrettyField(field); |
| } |
| } |
| if (!seen_non_ref) { |
| DCHECK_EQ(num_fields, num_reference_fields) << PrettyClass(klass.Get()); |
| } |
| } |
| |
| size_t size = field_offset.Uint32Value(); |
| // Update klass |
| if (is_static) { |
| klass->SetNumReferenceStaticFields(num_reference_fields); |
| *class_size = size; |
| } else { |
| klass->SetNumReferenceInstanceFields(num_reference_fields); |
| if (!klass->IsVariableSize()) { |
| std::string temp; |
| DCHECK_GE(size, sizeof(mirror::Object)) << klass->GetDescriptor(&temp); |
| size_t previous_size = klass->GetObjectSize(); |
| if (previous_size != 0) { |
| // Make sure that we didn't originally have an incorrect size. |
| CHECK_EQ(previous_size, size) << klass->GetDescriptor(&temp); |
| } |
| klass->SetObjectSize(size); |
| } |
| } |
| return true; |
| } |
| |
| // Set the bitmap of reference offsets, refOffsets, from the ifields |
| // list. |
| void ClassLinker::CreateReferenceInstanceOffsets(Handle<mirror::Class> klass) { |
| uint32_t reference_offsets = 0; |
| mirror::Class* super_class = klass->GetSuperClass(); |
| if (super_class != nullptr) { |
| reference_offsets = super_class->GetReferenceInstanceOffsets(); |
| // If our superclass overflowed, we don't stand a chance. |
| if (reference_offsets == CLASS_WALK_SUPER) { |
| klass->SetReferenceInstanceOffsets(reference_offsets); |
| return; |
| } |
| } |
| CreateReferenceOffsets(klass, reference_offsets); |
| } |
| |
| void ClassLinker::CreateReferenceOffsets(Handle<mirror::Class> klass, |
| uint32_t reference_offsets) { |
| size_t num_reference_fields = klass->NumReferenceInstanceFieldsDuringLinking(); |
| mirror::ObjectArray<mirror::ArtField>* fields = klass->GetIFields(); |
| // All of the fields that contain object references are guaranteed |
| // to be at the beginning of the fields list. |
| for (size_t i = 0; i < num_reference_fields; ++i) { |
| // Note that byte_offset is the offset from the beginning of |
| // object, not the offset into instance data |
| mirror::ArtField* field = fields->Get(i); |
| MemberOffset byte_offset = field->GetOffsetDuringLinking(); |
| CHECK_EQ(byte_offset.Uint32Value() & (CLASS_OFFSET_ALIGNMENT - 1), 0U); |
| if (CLASS_CAN_ENCODE_OFFSET(byte_offset.Uint32Value())) { |
| uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset.Uint32Value()); |
| CHECK_NE(new_bit, 0U); |
| reference_offsets |= new_bit; |
| } else { |
| reference_offsets = CLASS_WALK_SUPER; |
| break; |
| } |
| } |
| klass->SetReferenceInstanceOffsets(reference_offsets); |
| } |
| |
| mirror::String* ClassLinker::ResolveString(const DexFile& dex_file, uint32_t string_idx, |
| Handle<mirror::DexCache> dex_cache) { |
| DCHECK(dex_cache.Get() != nullptr); |
| mirror::String* resolved = dex_cache->GetResolvedString(string_idx); |
| if (resolved != nullptr) { |
| return resolved; |
| } |
| uint32_t utf16_length; |
| const char* utf8_data = dex_file.StringDataAndUtf16LengthByIdx(string_idx, &utf16_length); |
| mirror::String* string = intern_table_->InternStrong(utf16_length, utf8_data); |
| dex_cache->SetResolvedString(string_idx, string); |
| return string; |
| } |
| |
| mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx, |
| mirror::Class* referrer) { |
| StackHandleScope<2> hs(Thread::Current()); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(referrer->GetDexCache())); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle(referrer->GetClassLoader())); |
| return ResolveType(dex_file, type_idx, dex_cache, class_loader); |
| } |
| |
| mirror::Class* ClassLinker::ResolveType(const DexFile& dex_file, uint16_t type_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader) { |
| DCHECK(dex_cache.Get() != nullptr); |
| mirror::Class* resolved = dex_cache->GetResolvedType(type_idx); |
| if (resolved == nullptr) { |
| Thread* self = Thread::Current(); |
| const char* descriptor = dex_file.StringByTypeIdx(type_idx); |
| resolved = FindClass(self, descriptor, class_loader); |
| if (resolved != nullptr) { |
| // TODO: we used to throw here if resolved's class loader was not the |
| // boot class loader. This was to permit different classes with the |
| // same name to be loaded simultaneously by different loaders |
| dex_cache->SetResolvedType(type_idx, resolved); |
| } else { |
| CHECK(self->IsExceptionPending()) |
| << "Expected pending exception for failed resolution of: " << descriptor; |
| // Convert a ClassNotFoundException to a NoClassDefFoundError. |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Throwable> cause(hs.NewHandle(self->GetException(nullptr))); |
| if (cause->InstanceOf(GetClassRoot(kJavaLangClassNotFoundException))) { |
| DCHECK(resolved == nullptr); // No Handle needed to preserve resolved. |
| self->ClearException(); |
| ThrowNoClassDefFoundError("Failed resolution of: %s", descriptor); |
| self->GetException(nullptr)->SetCause(cause.Get()); |
| } |
| } |
| } |
| DCHECK((resolved == nullptr) || resolved->IsResolved() || resolved->IsErroneous()) |
| << PrettyDescriptor(resolved) << " " << resolved->GetStatus(); |
| return resolved; |
| } |
| |
| mirror::ArtMethod* ClassLinker::ResolveMethod(const DexFile& dex_file, uint32_t method_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, |
| Handle<mirror::ArtMethod> referrer, |
| InvokeType type) { |
| DCHECK(dex_cache.Get() != nullptr); |
| // Check for hit in the dex cache. |
| mirror::ArtMethod* resolved = dex_cache->GetResolvedMethod(method_idx); |
| if (resolved != nullptr && !resolved->IsRuntimeMethod()) { |
| return resolved; |
| } |
| // Fail, get the declaring class. |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx); |
| mirror::Class* klass = ResolveType(dex_file, method_id.class_idx_, dex_cache, class_loader); |
| if (klass == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; |
| } |
| // Scan using method_idx, this saves string compares but will only hit for matching dex |
| // caches/files. |
| switch (type) { |
| case kDirect: // Fall-through. |
| case kStatic: |
| resolved = klass->FindDirectMethod(dex_cache.Get(), method_idx); |
| break; |
| case kInterface: |
| resolved = klass->FindInterfaceMethod(dex_cache.Get(), method_idx); |
| DCHECK(resolved == nullptr || resolved->GetDeclaringClass()->IsInterface()); |
| break; |
| case kSuper: // Fall-through. |
| case kVirtual: |
| resolved = klass->FindVirtualMethod(dex_cache.Get(), method_idx); |
| break; |
| default: |
| LOG(FATAL) << "Unreachable - invocation type: " << type; |
| } |
| if (resolved == nullptr) { |
| // Search by name, which works across dex files. |
| const char* name = dex_file.StringDataByIdx(method_id.name_idx_); |
| const Signature signature = dex_file.GetMethodSignature(method_id); |
| switch (type) { |
| case kDirect: // Fall-through. |
| case kStatic: |
| resolved = klass->FindDirectMethod(name, signature); |
| break; |
| case kInterface: |
| resolved = klass->FindInterfaceMethod(name, signature); |
| DCHECK(resolved == nullptr || resolved->GetDeclaringClass()->IsInterface()); |
| break; |
| case kSuper: // Fall-through. |
| case kVirtual: |
| resolved = klass->FindVirtualMethod(name, signature); |
| break; |
| } |
| } |
| // If we found a method, check for incompatible class changes. |
| if (LIKELY(resolved != nullptr && !resolved->CheckIncompatibleClassChange(type))) { |
| // Be a good citizen and update the dex cache to speed subsequent calls. |
| dex_cache->SetResolvedMethod(method_idx, resolved); |
| return resolved; |
| } else { |
| // If we had a method, it's an incompatible-class-change error. |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, resolved->GetInvokeType(), resolved, referrer.Get()); |
| } else { |
| // We failed to find the method which means either an access error, an incompatible class |
| // change, or no such method. First try to find the method among direct and virtual methods. |
| const char* name = dex_file.StringDataByIdx(method_id.name_idx_); |
| const Signature signature = dex_file.GetMethodSignature(method_id); |
| switch (type) { |
| case kDirect: |
| case kStatic: |
| resolved = klass->FindVirtualMethod(name, signature); |
| // Note: kDirect and kStatic are also mutually exclusive, but in that case we would |
| // have had a resolved method before, which triggers the "true" branch above. |
| break; |
| case kInterface: |
| case kVirtual: |
| case kSuper: |
| resolved = klass->FindDirectMethod(name, signature); |
| break; |
| } |
| |
| // If we found something, check that it can be accessed by the referrer. |
| if (resolved != nullptr && referrer.Get() != nullptr) { |
| mirror::Class* methods_class = resolved->GetDeclaringClass(); |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (!referring_class->CanAccess(methods_class)) { |
| ThrowIllegalAccessErrorClassForMethodDispatch(referring_class, methods_class, |
| resolved, type); |
| return nullptr; |
| } else if (!referring_class->CanAccessMember(methods_class, |
| resolved->GetAccessFlags())) { |
| ThrowIllegalAccessErrorMethod(referring_class, resolved); |
| return nullptr; |
| } |
| } |
| |
| // Otherwise, throw an IncompatibleClassChangeError if we found something, and check interface |
| // methods and throw if we find the method there. If we find nothing, throw a |
| // NoSuchMethodError. |
| switch (type) { |
| case kDirect: |
| case kStatic: |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer.Get()); |
| } else { |
| resolved = klass->FindInterfaceMethod(name, signature); |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer.Get()); |
| } else { |
| ThrowNoSuchMethodError(type, klass, name, signature); |
| } |
| } |
| break; |
| case kInterface: |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get()); |
| } else { |
| resolved = klass->FindVirtualMethod(name, signature); |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kVirtual, resolved, referrer.Get()); |
| } else { |
| ThrowNoSuchMethodError(type, klass, name, signature); |
| } |
| } |
| break; |
| case kSuper: |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get()); |
| } else { |
| ThrowNoSuchMethodError(type, klass, name, signature); |
| } |
| break; |
| case kVirtual: |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kDirect, resolved, referrer.Get()); |
| } else { |
| resolved = klass->FindInterfaceMethod(name, signature); |
| if (resolved != nullptr) { |
| ThrowIncompatibleClassChangeError(type, kInterface, resolved, referrer.Get()); |
| } else { |
| ThrowNoSuchMethodError(type, klass, name, signature); |
| } |
| } |
| break; |
| } |
| } |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; |
| } |
| } |
| |
| mirror::ArtField* ClassLinker::ResolveField(const DexFile& dex_file, uint32_t field_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, |
| bool is_static) { |
| DCHECK(dex_cache.Get() != nullptr); |
| mirror::ArtField* resolved = dex_cache->GetResolvedField(field_idx); |
| if (resolved != nullptr) { |
| return resolved; |
| } |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx); |
| Thread* const self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> klass( |
| hs.NewHandle(ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader))); |
| if (klass.Get() == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; |
| } |
| |
| if (is_static) { |
| resolved = mirror::Class::FindStaticField(self, klass, dex_cache.Get(), field_idx); |
| } else { |
| resolved = klass->FindInstanceField(dex_cache.Get(), field_idx); |
| } |
| |
| if (resolved == nullptr) { |
| const char* name = dex_file.GetFieldName(field_id); |
| const char* type = dex_file.GetFieldTypeDescriptor(field_id); |
| if (is_static) { |
| resolved = mirror::Class::FindStaticField(self, klass, name, type); |
| } else { |
| resolved = klass->FindInstanceField(name, type); |
| } |
| if (resolved == nullptr) { |
| ThrowNoSuchFieldError(is_static ? "static " : "instance ", klass.Get(), type, name); |
| return nullptr; |
| } |
| } |
| dex_cache->SetResolvedField(field_idx, resolved); |
| return resolved; |
| } |
| |
| mirror::ArtField* ClassLinker::ResolveFieldJLS(const DexFile& dex_file, |
| uint32_t field_idx, |
| Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader) { |
| DCHECK(dex_cache.Get() != nullptr); |
| mirror::ArtField* resolved = dex_cache->GetResolvedField(field_idx); |
| if (resolved != nullptr) { |
| return resolved; |
| } |
| const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx); |
| Thread* self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> klass( |
| hs.NewHandle(ResolveType(dex_file, field_id.class_idx_, dex_cache, class_loader))); |
| if (klass.Get() == nullptr) { |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; |
| } |
| |
| StringPiece name(dex_file.StringDataByIdx(field_id.name_idx_)); |
| StringPiece type(dex_file.StringDataByIdx( |
| dex_file.GetTypeId(field_id.type_idx_).descriptor_idx_)); |
| resolved = mirror::Class::FindField(self, klass, name, type); |
| if (resolved != nullptr) { |
| dex_cache->SetResolvedField(field_idx, resolved); |
| } else { |
| ThrowNoSuchFieldError("", klass.Get(), type, name); |
| } |
| return resolved; |
| } |
| |
| const char* ClassLinker::MethodShorty(uint32_t method_idx, mirror::ArtMethod* referrer, |
| uint32_t* length) { |
| mirror::Class* declaring_class = referrer->GetDeclaringClass(); |
| mirror::DexCache* dex_cache = declaring_class->GetDexCache(); |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx); |
| return dex_file.GetMethodShorty(method_id, length); |
| } |
| |
| void ClassLinker::DumpAllClasses(int flags) { |
| if (dex_cache_image_class_lookup_required_) { |
| MoveImageClassesToClassTable(); |
| } |
| // TODO: at the time this was written, it wasn't safe to call PrettyField with the ClassLinker |
| // lock held, because it might need to resolve a field's type, which would try to take the lock. |
| std::vector<mirror::Class*> all_classes; |
| { |
| ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| for (std::pair<const size_t, GcRoot<mirror::Class> >& it : class_table_) { |
| mirror::Class* klass = it.second.Read(); |
| all_classes.push_back(klass); |
| } |
| } |
| |
| for (size_t i = 0; i < all_classes.size(); ++i) { |
| all_classes[i]->DumpClass(std::cerr, flags); |
| } |
| } |
| |
| void ClassLinker::DumpForSigQuit(std::ostream& os) { |
| Thread* self = Thread::Current(); |
| if (dex_cache_image_class_lookup_required_) { |
| ScopedObjectAccess soa(self); |
| MoveImageClassesToClassTable(); |
| } |
| ReaderMutexLock mu(self, *Locks::classlinker_classes_lock_); |
| os << "Loaded classes: " << class_table_.size() << " allocated classes\n"; |
| } |
| |
| size_t ClassLinker::NumLoadedClasses() { |
| if (dex_cache_image_class_lookup_required_) { |
| MoveImageClassesToClassTable(); |
| } |
| ReaderMutexLock mu(Thread::Current(), *Locks::classlinker_classes_lock_); |
| return class_table_.size(); |
| } |
| |
| pid_t ClassLinker::GetClassesLockOwner() { |
| return Locks::classlinker_classes_lock_->GetExclusiveOwnerTid(); |
| } |
| |
| pid_t ClassLinker::GetDexLockOwner() { |
| return dex_lock_.GetExclusiveOwnerTid(); |
| } |
| |
| void ClassLinker::SetClassRoot(ClassRoot class_root, mirror::Class* klass) { |
| DCHECK(!init_done_); |
| |
| DCHECK(klass != nullptr); |
| DCHECK(klass->GetClassLoader() == nullptr); |
| |
| mirror::ObjectArray<mirror::Class>* class_roots = class_roots_.Read(); |
| DCHECK(class_roots != nullptr); |
| DCHECK(class_roots->Get(class_root) == nullptr); |
| class_roots->Set<false>(class_root, klass); |
| } |
| |
| } // namespace art |