| /* |
| * Copyright (C) 2012 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. |
| */ |
| |
| #ifndef ART_RUNTIME_RUNTIME_SUPPORT_H_ |
| #define ART_RUNTIME_RUNTIME_SUPPORT_H_ |
| |
| #include "class_linker.h" |
| #include "common_throws.h" |
| #include "dex_file.h" |
| #include "indirect_reference_table.h" |
| #include "invoke_type.h" |
| #include "jni_internal.h" |
| #include "mirror/abstract_method.h" |
| #include "mirror/array.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/throwable.h" |
| #include "object_utils.h" |
| #include "thread.h" |
| |
| extern "C" void art_interpreter_invoke_handler(); |
| extern "C" void art_jni_dlsym_lookup_stub(); |
| extern "C" void art_portable_abstract_method_error_stub(); |
| extern "C" void art_portable_proxy_invoke_handler(); |
| extern "C" void art_quick_abstract_method_error_stub(); |
| extern "C" void art_quick_deoptimize(); |
| extern "C" void art_quick_instrumentation_entry_from_code(void*); |
| extern "C" void art_quick_instrumentation_exit_from_code(); |
| extern "C" void art_quick_interpreter_entry(void*); |
| extern "C" void art_quick_proxy_invoke_handler(); |
| extern "C" void art_work_around_app_jni_bugs(); |
| |
| extern "C" double art_l2d(int64_t l); |
| extern "C" float art_l2f(int64_t l); |
| extern "C" int64_t art_d2l(double d); |
| extern "C" int32_t art_d2i(double d); |
| extern "C" int64_t art_f2l(float f); |
| extern "C" int32_t art_f2i(float f); |
| |
| namespace art { |
| namespace mirror { |
| class Class; |
| class Field; |
| class Object; |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to a Class. If it |
| // cannot be resolved, throw an error. If it can, use it to create an instance. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| static inline mirror::Object* AllocObjectFromCode(uint32_t type_idx, mirror::AbstractMethod* method, |
| Thread* self, |
| bool access_check) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| Runtime* runtime = Runtime::Current(); |
| if (UNLIKELY(klass == NULL)) { |
| klass = runtime->GetClassLinker()->ResolveType(type_idx, method); |
| if (klass == NULL) { |
| DCHECK(self->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| } |
| if (access_check) { |
| if (UNLIKELY(!klass->IsInstantiable())) { |
| ThrowLocation throw_location = self->GetCurrentLocationForThrow(); |
| self->ThrowNewException(throw_location, "Ljava/lang/InstantiationError;", |
| PrettyDescriptor(klass).c_str()); |
| return NULL; // Failure |
| } |
| mirror::Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| return NULL; // Failure |
| } |
| } |
| if (!klass->IsInitialized() && |
| !runtime->GetClassLinker()->EnsureInitialized(klass, true, true)) { |
| DCHECK(self->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| return klass->AllocObject(self); |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If |
| // it cannot be resolved, throw an error. If it can, use it to create an array. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| static inline mirror::Array* AllocArrayFromCode(uint32_t type_idx, mirror::AbstractMethod* method, |
| int32_t component_count, |
| Thread* self, bool access_check) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| return NULL; // Failure |
| } |
| mirror::Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| if (UNLIKELY(klass == NULL)) { // Not in dex cache so try to resolve |
| klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method); |
| if (klass == NULL) { // Error |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| CHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| } |
| if (access_check) { |
| mirror::Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| return NULL; // Failure |
| } |
| } |
| return mirror::Array::Alloc(self, klass, component_count); |
| } |
| |
| extern mirror::Array* CheckAndAllocArrayFromCode(uint32_t type_idx, mirror::AbstractMethod* method, |
| int32_t component_count, |
| Thread* self, bool access_check) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| // Type of find field operation for fast and slow case. |
| enum FindFieldType { |
| InstanceObjectRead, |
| InstanceObjectWrite, |
| InstancePrimitiveRead, |
| InstancePrimitiveWrite, |
| StaticObjectRead, |
| StaticObjectWrite, |
| StaticPrimitiveRead, |
| StaticPrimitiveWrite, |
| }; |
| |
| // Slow field find that can initialize classes and may throw exceptions. |
| extern mirror::Field* FindFieldFromCode(uint32_t field_idx, const mirror::AbstractMethod* referrer, |
| Thread* self, FindFieldType type, size_t expected_size, |
| bool access_check) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| // Fast path field resolution that can't initialize classes or throw exceptions. |
| static inline mirror::Field* FindFieldFast(uint32_t field_idx, |
| const mirror::AbstractMethod* referrer, |
| FindFieldType type, size_t expected_size) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Field* resolved_field = |
| referrer->GetDeclaringClass()->GetDexCache()->GetResolvedField(field_idx); |
| if (UNLIKELY(resolved_field == NULL)) { |
| return NULL; |
| } |
| mirror::Class* fields_class = resolved_field->GetDeclaringClass(); |
| // Check class is initiliazed or initializing. |
| if (UNLIKELY(!fields_class->IsInitializing())) { |
| return NULL; |
| } |
| // Check for incompatible class change. |
| bool is_primitive; |
| bool is_set; |
| bool is_static; |
| switch (type) { |
| case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| case StaticPrimitiveWrite: is_primitive = true; is_set = true; is_static = true; break; |
| default: |
| LOG(FATAL) << "UNREACHABLE"; // Assignment below to avoid GCC warnings. |
| is_primitive = true; |
| is_set = true; |
| is_static = true; |
| break; |
| } |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| // Incompatible class change. |
| return NULL; |
| } |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| !referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()) || |
| (is_set && resolved_field->IsFinal() && (fields_class != referring_class)))) { |
| // Illegal access. |
| return NULL; |
| } |
| FieldHelper fh(resolved_field); |
| if (UNLIKELY(fh.IsPrimitiveType() != is_primitive || |
| fh.FieldSize() != expected_size)) { |
| return NULL; |
| } |
| return resolved_field; |
| } |
| |
| // Fast path method resolution that can't throw exceptions. |
| static inline mirror::AbstractMethod* FindMethodFast(uint32_t method_idx, |
| mirror::Object* this_object, |
| const mirror::AbstractMethod* referrer, |
| bool access_check, InvokeType type) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| bool is_direct = type == kStatic || type == kDirect; |
| if (UNLIKELY(this_object == NULL && !is_direct)) { |
| return NULL; |
| } |
| mirror::AbstractMethod* resolved_method = |
| referrer->GetDeclaringClass()->GetDexCache()->GetResolvedMethod(method_idx); |
| if (UNLIKELY(resolved_method == NULL)) { |
| return NULL; |
| } |
| if (access_check) { |
| // Check for incompatible class change errors and access. |
| bool icce = resolved_method->CheckIncompatibleClassChange(type); |
| if (UNLIKELY(icce)) { |
| return NULL; |
| } |
| mirror::Class* methods_class = resolved_method->GetDeclaringClass(); |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(methods_class) || |
| !referring_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags()))) { |
| // Potential illegal access, may need to refine the method's class. |
| return NULL; |
| } |
| } |
| if (type == kInterface) { // Most common form of slow path dispatch. |
| return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| } else if (is_direct) { |
| return resolved_method; |
| } else if (type == kSuper) { |
| return referrer->GetDeclaringClass()->GetSuperClass()->GetVTable()-> |
| Get(resolved_method->GetMethodIndex()); |
| } else { |
| DCHECK(type == kVirtual); |
| return this_object->GetClass()->GetVTable()->Get(resolved_method->GetMethodIndex()); |
| } |
| } |
| |
| extern mirror::AbstractMethod* FindMethodFromCode(uint32_t method_idx, mirror::Object* this_object, |
| mirror::AbstractMethod* referrer, |
| Thread* self, bool access_check, InvokeType type) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| static inline mirror::Class* ResolveVerifyAndClinit(uint32_t type_idx, |
| const mirror::AbstractMethod* referrer, |
| Thread* self, bool can_run_clinit, |
| bool verify_access) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| mirror::Class* klass = class_linker->ResolveType(type_idx, referrer); |
| if (UNLIKELY(klass == NULL)) { |
| CHECK(self->IsExceptionPending()); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| // Perform access check if necessary. |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referring_class, klass); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| // If we're just implementing const-class, we shouldn't call <clinit>. |
| if (!can_run_clinit) { |
| return klass; |
| } |
| // If we are the <clinit> of this class, just return our storage. |
| // |
| // Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished |
| // running. |
| if (klass == referring_class && MethodHelper(referrer).IsClassInitializer()) { |
| return klass; |
| } |
| if (!class_linker->EnsureInitialized(klass, true, true)) { |
| CHECK(self->IsExceptionPending()); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| referrer->GetDexCacheInitializedStaticStorage()->Set(type_idx, klass); |
| return klass; |
| } |
| |
| extern void ThrowStackOverflowError(Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| static inline mirror::String* ResolveStringFromCode(const mirror::AbstractMethod* referrer, |
| uint32_t string_idx) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| return class_linker->ResolveString(string_idx, referrer); |
| } |
| |
| static inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| UNLOCK_FUNCTION(monitor_lock_) { |
| // Save any pending exception over monitor exit call. |
| mirror::Throwable* saved_exception = NULL; |
| ThrowLocation saved_throw_location; |
| if (UNLIKELY(self->IsExceptionPending())) { |
| saved_exception = self->GetException(&saved_throw_location); |
| self->ClearException(); |
| } |
| // Decode locked object and unlock, before popping local references. |
| self->DecodeJObject(locked)->MonitorExit(self); |
| if (UNLIKELY(self->IsExceptionPending())) { |
| LOG(FATAL) << "Synchronized JNI code returning with an exception:\n" |
| << saved_exception->Dump() |
| << "\nEncountered second exception during implicit MonitorExit:\n" |
| << self->GetException(NULL)->Dump(); |
| } |
| // Restore pending exception. |
| if (saved_exception != NULL) { |
| self->SetException(saved_throw_location, saved_exception); |
| } |
| } |
| |
| static inline void CheckReferenceResult(mirror::Object* o, Thread* self) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (o == NULL) { |
| return; |
| } |
| mirror::AbstractMethod* m = self->GetCurrentMethod(NULL); |
| if (o == kInvalidIndirectRefObject) { |
| JniAbortF(NULL, "invalid reference returned from %s", PrettyMethod(m).c_str()); |
| } |
| // Make sure that the result is an instance of the type this method was expected to return. |
| mirror::Class* return_type = MethodHelper(m).GetReturnType(); |
| |
| if (!o->InstanceOf(return_type)) { |
| JniAbortF(NULL, "attempt to return an instance of %s from %s", |
| PrettyTypeOf(o).c_str(), PrettyMethod(m).c_str()); |
| } |
| } |
| |
| static inline void CheckSuspend(Thread* thread) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| for (;;) { |
| if (thread->ReadFlag(kCheckpointRequest)) { |
| thread->RunCheckpointFunction(); |
| thread->AtomicClearFlag(kCheckpointRequest); |
| } else if (thread->ReadFlag(kSuspendRequest)) { |
| thread->FullSuspendCheck(); |
| } else { |
| break; |
| } |
| } |
| } |
| |
| JValue InvokeProxyInvocationHandler(ScopedObjectAccessUnchecked& soa, const char* shorty, |
| jobject rcvr_jobj, jobject interface_method_jobj, |
| std::vector<jvalue>& args) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| // Entry point for deoptimization. |
| static inline uintptr_t GetDeoptimizationEntryPoint() { |
| return reinterpret_cast<uintptr_t>(art_quick_deoptimize); |
| } |
| |
| // Return address of instrumentation stub. |
| static inline void* GetInstrumentationEntryPoint() { |
| return reinterpret_cast<void*>(art_quick_instrumentation_entry_from_code); |
| } |
| |
| // The return_pc of instrumentation exit stub. |
| static inline uintptr_t GetInstrumentationExitPc() { |
| return reinterpret_cast<uintptr_t>(art_quick_instrumentation_exit_from_code); |
| } |
| |
| // Return address of interpreter stub. |
| static inline void* GetInterpreterEntryPoint() { |
| return reinterpret_cast<void*>(art_quick_interpreter_entry); |
| } |
| |
| static inline const void* GetPortableResolutionTrampoline(ClassLinker* class_linker) { |
| return class_linker->GetPortableResolutionTrampoline(); |
| } |
| |
| static inline const void* GetQuickResolutionTrampoline(ClassLinker* class_linker) { |
| return class_linker->GetQuickResolutionTrampoline(); |
| } |
| |
| // Return address of resolution trampoline stub for defined compiler. |
| static inline const void* GetResolutionTrampoline(ClassLinker* class_linker) { |
| #if defined(ART_USE_PORTABLE_COMPILER) |
| return GetPortableResolutionTrampoline(class_linker); |
| #else |
| return GetQuickResolutionTrampoline(class_linker); |
| #endif |
| } |
| |
| static inline void* GetPortableAbstractMethodErrorStub() { |
| return reinterpret_cast<void*>(art_portable_abstract_method_error_stub); |
| } |
| |
| static inline void* GetQuickAbstractMethodErrorStub() { |
| return reinterpret_cast<void*>(art_quick_abstract_method_error_stub); |
| } |
| |
| // Return address of abstract method error stub for defined compiler. |
| static inline void* GetAbstractMethodErrorStub() { |
| #if defined(ART_USE_PORTABLE_COMPILER) |
| return GetPortableAbstractMethodErrorStub(); |
| #else |
| return GetQuickAbstractMethodErrorStub(); |
| #endif |
| } |
| |
| static inline void* GetJniDlsymLookupStub() { |
| return reinterpret_cast<void*>(art_jni_dlsym_lookup_stub); |
| } |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_RUNTIME_SUPPORT_H_ |
