| /* |
| * 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 "art_method.h" |
| |
| #include <cstddef> |
| |
| #include "android-base/stringprintf.h" |
| |
| #include "arch/context.h" |
| #include "art_method-inl.h" |
| #include "base/stringpiece.h" |
| #include "class_linker-inl.h" |
| #include "debugger.h" |
| #include "dex/descriptors_names.h" |
| #include "dex/dex_file-inl.h" |
| #include "dex/dex_file_exception_helpers.h" |
| #include "dex/dex_instruction.h" |
| #include "entrypoints/runtime_asm_entrypoints.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "interpreter/interpreter.h" |
| #include "jit/jit.h" |
| #include "jit/jit_code_cache.h" |
| #include "jit/profiling_info.h" |
| #include "jni_internal.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class_ext.h" |
| #include "mirror/executable.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/string.h" |
| #include "oat_file-inl.h" |
| #include "quicken_info.h" |
| #include "runtime_callbacks.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "vdex_file.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| using android::base::StringPrintf; |
| |
| extern "C" void art_quick_invoke_stub(ArtMethod*, uint32_t*, uint32_t, Thread*, JValue*, |
| const char*); |
| extern "C" void art_quick_invoke_static_stub(ArtMethod*, uint32_t*, uint32_t, Thread*, JValue*, |
| const char*); |
| |
| DEFINE_RUNTIME_DEBUG_FLAG(ArtMethod, kCheckDeclaringClassState); |
| |
| // Enforce that we he have the right index for runtime methods. |
| static_assert(ArtMethod::kRuntimeMethodDexMethodIndex == dex::kDexNoIndex, |
| "Wrong runtime-method dex method index"); |
| |
| ArtMethod* ArtMethod::GetCanonicalMethod(PointerSize pointer_size) { |
| if (LIKELY(!IsDefault())) { |
| return this; |
| } else { |
| mirror::Class* declaring_class = GetDeclaringClass(); |
| DCHECK(declaring_class->IsInterface()); |
| ArtMethod* ret = declaring_class->FindInterfaceMethod(declaring_class->GetDexCache(), |
| GetDexMethodIndex(), |
| pointer_size); |
| DCHECK(ret != nullptr); |
| return ret; |
| } |
| } |
| |
| ArtMethod* ArtMethod::GetNonObsoleteMethod() { |
| DCHECK_EQ(kRuntimePointerSize, Runtime::Current()->GetClassLinker()->GetImagePointerSize()); |
| if (LIKELY(!IsObsolete())) { |
| return this; |
| } else if (IsDirect()) { |
| return &GetDeclaringClass()->GetDirectMethodsSlice(kRuntimePointerSize)[GetMethodIndex()]; |
| } else { |
| return GetDeclaringClass()->GetVTableEntry(GetMethodIndex(), kRuntimePointerSize); |
| } |
| } |
| |
| template <ReadBarrierOption kReadBarrierOption> |
| ArtMethod* ArtMethod::GetSingleImplementation(PointerSize pointer_size) { |
| if (!IsAbstract<kReadBarrierOption>()) { |
| // A non-abstract's single implementation is itself. |
| return this; |
| } |
| return reinterpret_cast<ArtMethod*>(GetDataPtrSize(pointer_size)); |
| } |
| template ArtMethod* ArtMethod::GetSingleImplementation<ReadBarrierOption::kWithReadBarrier>( |
| PointerSize pointer_size); |
| template ArtMethod* ArtMethod::GetSingleImplementation<ReadBarrierOption::kWithoutReadBarrier>( |
| PointerSize pointer_size); |
| |
| ArtMethod* ArtMethod::FromReflectedMethod(const ScopedObjectAccessAlreadyRunnable& soa, |
| jobject jlr_method) { |
| ObjPtr<mirror::Executable> executable = soa.Decode<mirror::Executable>(jlr_method); |
| DCHECK(executable != nullptr); |
| return executable->GetArtMethod(); |
| } |
| |
| mirror::DexCache* ArtMethod::GetObsoleteDexCache() { |
| DCHECK(!Runtime::Current()->IsAotCompiler()) << PrettyMethod(); |
| DCHECK(IsObsolete()); |
| ObjPtr<mirror::ClassExt> ext(GetDeclaringClass()->GetExtData()); |
| CHECK(!ext.IsNull()); |
| ObjPtr<mirror::PointerArray> obsolete_methods(ext->GetObsoleteMethods()); |
| CHECK(!obsolete_methods.IsNull()); |
| DCHECK(ext->GetObsoleteDexCaches() != nullptr); |
| int32_t len = obsolete_methods->GetLength(); |
| DCHECK_EQ(len, ext->GetObsoleteDexCaches()->GetLength()); |
| // Using kRuntimePointerSize (instead of using the image's pointer size) is fine since images |
| // should never have obsolete methods in them so they should always be the same. |
| PointerSize pointer_size = kRuntimePointerSize; |
| DCHECK_EQ(kRuntimePointerSize, Runtime::Current()->GetClassLinker()->GetImagePointerSize()); |
| for (int32_t i = 0; i < len; i++) { |
| if (this == obsolete_methods->GetElementPtrSize<ArtMethod*>(i, pointer_size)) { |
| return ext->GetObsoleteDexCaches()->Get(i); |
| } |
| } |
| LOG(FATAL) << "This method does not appear in the obsolete map of its class!"; |
| UNREACHABLE(); |
| } |
| |
| uint16_t ArtMethod::FindObsoleteDexClassDefIndex() { |
| DCHECK(!Runtime::Current()->IsAotCompiler()) << PrettyMethod(); |
| DCHECK(IsObsolete()); |
| const DexFile* dex_file = GetDexFile(); |
| const dex::TypeIndex declaring_class_type = dex_file->GetMethodId(GetDexMethodIndex()).class_idx_; |
| const DexFile::ClassDef* class_def = dex_file->FindClassDef(declaring_class_type); |
| CHECK(class_def != nullptr); |
| return dex_file->GetIndexForClassDef(*class_def); |
| } |
| |
| ObjPtr<mirror::String> ArtMethod::GetNameAsString(Thread* self) { |
| CHECK(!IsProxyMethod()); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(GetDexCache())); |
| auto* dex_file = dex_cache->GetDexFile(); |
| uint32_t dex_method_idx = GetDexMethodIndex(); |
| const DexFile::MethodId& method_id = dex_file->GetMethodId(dex_method_idx); |
| return Runtime::Current()->GetClassLinker()->ResolveString(method_id.name_idx_, dex_cache); |
| } |
| |
| void ArtMethod::ThrowInvocationTimeError() { |
| DCHECK(!IsInvokable()); |
| // NOTE: IsDefaultConflicting must be first since the actual method might or might not be abstract |
| // due to the way we select it. |
| if (IsDefaultConflicting()) { |
| ThrowIncompatibleClassChangeErrorForMethodConflict(this); |
| } else { |
| DCHECK(IsAbstract()); |
| ThrowAbstractMethodError(this); |
| } |
| } |
| |
| InvokeType ArtMethod::GetInvokeType() { |
| // TODO: kSuper? |
| if (IsStatic()) { |
| return kStatic; |
| } else if (GetDeclaringClass()->IsInterface()) { |
| return kInterface; |
| } else if (IsDirect()) { |
| return kDirect; |
| } else if (IsPolymorphicSignature()) { |
| return kPolymorphic; |
| } else { |
| return kVirtual; |
| } |
| } |
| |
| size_t ArtMethod::NumArgRegisters(const StringPiece& shorty) { |
| CHECK_LE(1U, shorty.length()); |
| uint32_t num_registers = 0; |
| for (size_t i = 1; i < shorty.length(); ++i) { |
| char ch = shorty[i]; |
| if (ch == 'D' || ch == 'J') { |
| num_registers += 2; |
| } else { |
| num_registers += 1; |
| } |
| } |
| return num_registers; |
| } |
| |
| bool ArtMethod::HasSameNameAndSignature(ArtMethod* other) { |
| ScopedAssertNoThreadSuspension ants("HasSameNameAndSignature"); |
| const DexFile* dex_file = GetDexFile(); |
| const DexFile::MethodId& mid = dex_file->GetMethodId(GetDexMethodIndex()); |
| if (GetDexCache() == other->GetDexCache()) { |
| const DexFile::MethodId& mid2 = dex_file->GetMethodId(other->GetDexMethodIndex()); |
| return mid.name_idx_ == mid2.name_idx_ && mid.proto_idx_ == mid2.proto_idx_; |
| } |
| const DexFile* dex_file2 = other->GetDexFile(); |
| const DexFile::MethodId& mid2 = dex_file2->GetMethodId(other->GetDexMethodIndex()); |
| if (!DexFileStringEquals(dex_file, mid.name_idx_, dex_file2, mid2.name_idx_)) { |
| return false; // Name mismatch. |
| } |
| return dex_file->GetMethodSignature(mid) == dex_file2->GetMethodSignature(mid2); |
| } |
| |
| ArtMethod* ArtMethod::FindOverriddenMethod(PointerSize pointer_size) { |
| if (IsStatic()) { |
| return nullptr; |
| } |
| mirror::Class* declaring_class = GetDeclaringClass(); |
| mirror::Class* super_class = declaring_class->GetSuperClass(); |
| uint16_t method_index = GetMethodIndex(); |
| ArtMethod* result = nullptr; |
| // Did this method override a super class method? If so load the result from the super class' |
| // vtable |
| if (super_class->HasVTable() && method_index < super_class->GetVTableLength()) { |
| result = super_class->GetVTableEntry(method_index, pointer_size); |
| } else { |
| // Method didn't override superclass method so search interfaces |
| if (IsProxyMethod()) { |
| result = GetInterfaceMethodIfProxy(pointer_size); |
| DCHECK(result != nullptr); |
| } else { |
| mirror::IfTable* iftable = GetDeclaringClass()->GetIfTable(); |
| for (size_t i = 0; i < iftable->Count() && result == nullptr; i++) { |
| mirror::Class* interface = iftable->GetInterface(i); |
| for (ArtMethod& interface_method : interface->GetVirtualMethods(pointer_size)) { |
| if (HasSameNameAndSignature(interface_method.GetInterfaceMethodIfProxy(pointer_size))) { |
| result = &interface_method; |
| break; |
| } |
| } |
| } |
| } |
| } |
| DCHECK(result == nullptr || |
| GetInterfaceMethodIfProxy(pointer_size)->HasSameNameAndSignature( |
| result->GetInterfaceMethodIfProxy(pointer_size))); |
| return result; |
| } |
| |
| uint32_t ArtMethod::FindDexMethodIndexInOtherDexFile(const DexFile& other_dexfile, |
| uint32_t name_and_signature_idx) { |
| const DexFile* dexfile = GetDexFile(); |
| const uint32_t dex_method_idx = GetDexMethodIndex(); |
| const DexFile::MethodId& mid = dexfile->GetMethodId(dex_method_idx); |
| const DexFile::MethodId& name_and_sig_mid = other_dexfile.GetMethodId(name_and_signature_idx); |
| DCHECK_STREQ(dexfile->GetMethodName(mid), other_dexfile.GetMethodName(name_and_sig_mid)); |
| DCHECK_EQ(dexfile->GetMethodSignature(mid), other_dexfile.GetMethodSignature(name_and_sig_mid)); |
| if (dexfile == &other_dexfile) { |
| return dex_method_idx; |
| } |
| const char* mid_declaring_class_descriptor = dexfile->StringByTypeIdx(mid.class_idx_); |
| const DexFile::TypeId* other_type_id = other_dexfile.FindTypeId(mid_declaring_class_descriptor); |
| if (other_type_id != nullptr) { |
| const DexFile::MethodId* other_mid = other_dexfile.FindMethodId( |
| *other_type_id, other_dexfile.GetStringId(name_and_sig_mid.name_idx_), |
| other_dexfile.GetProtoId(name_and_sig_mid.proto_idx_)); |
| if (other_mid != nullptr) { |
| return other_dexfile.GetIndexForMethodId(*other_mid); |
| } |
| } |
| return dex::kDexNoIndex; |
| } |
| |
| uint32_t ArtMethod::FindCatchBlock(Handle<mirror::Class> exception_type, |
| uint32_t dex_pc, bool* has_no_move_exception) { |
| // Set aside the exception while we resolve its type. |
| Thread* self = Thread::Current(); |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Throwable> exception(hs.NewHandle(self->GetException())); |
| self->ClearException(); |
| // Default to handler not found. |
| uint32_t found_dex_pc = dex::kDexNoIndex; |
| // Iterate over the catch handlers associated with dex_pc. |
| CodeItemDataAccessor accessor(DexInstructionData()); |
| for (CatchHandlerIterator it(accessor, dex_pc); it.HasNext(); it.Next()) { |
| dex::TypeIndex iter_type_idx = it.GetHandlerTypeIndex(); |
| // Catch all case |
| if (!iter_type_idx.IsValid()) { |
| found_dex_pc = it.GetHandlerAddress(); |
| break; |
| } |
| // Does this catch exception type apply? |
| ObjPtr<mirror::Class> iter_exception_type = ResolveClassFromTypeIndex(iter_type_idx); |
| if (UNLIKELY(iter_exception_type == nullptr)) { |
| // Now have a NoClassDefFoundError as exception. Ignore in case the exception class was |
| // removed by a pro-guard like tool. |
| // Note: this is not RI behavior. RI would have failed when loading the class. |
| self->ClearException(); |
| // Delete any long jump context as this routine is called during a stack walk which will |
| // release its in use context at the end. |
| delete self->GetLongJumpContext(); |
| LOG(WARNING) << "Unresolved exception class when finding catch block: " |
| << DescriptorToDot(GetTypeDescriptorFromTypeIdx(iter_type_idx)); |
| } else if (iter_exception_type->IsAssignableFrom(exception_type.Get())) { |
| found_dex_pc = it.GetHandlerAddress(); |
| break; |
| } |
| } |
| if (found_dex_pc != dex::kDexNoIndex) { |
| const Instruction& first_catch_instr = accessor.InstructionAt(found_dex_pc); |
| *has_no_move_exception = (first_catch_instr.Opcode() != Instruction::MOVE_EXCEPTION); |
| } |
| // Put the exception back. |
| if (exception != nullptr) { |
| self->SetException(exception.Get()); |
| } |
| return found_dex_pc; |
| } |
| |
| void ArtMethod::Invoke(Thread* self, uint32_t* args, uint32_t args_size, JValue* result, |
| const char* shorty) { |
| if (UNLIKELY(__builtin_frame_address(0) < self->GetStackEnd())) { |
| ThrowStackOverflowError(self); |
| return; |
| } |
| |
| if (kIsDebugBuild) { |
| self->AssertThreadSuspensionIsAllowable(); |
| CHECK_EQ(kRunnable, self->GetState()); |
| CHECK_STREQ(GetInterfaceMethodIfProxy(kRuntimePointerSize)->GetShorty(), shorty); |
| } |
| |
| // Push a transition back into managed code onto the linked list in thread. |
| ManagedStack fragment; |
| self->PushManagedStackFragment(&fragment); |
| |
| Runtime* runtime = Runtime::Current(); |
| // Call the invoke stub, passing everything as arguments. |
| // If the runtime is not yet started or it is required by the debugger, then perform the |
| // Invocation by the interpreter, explicitly forcing interpretation over JIT to prevent |
| // cycling around the various JIT/Interpreter methods that handle method invocation. |
| if (UNLIKELY(!runtime->IsStarted() || Dbg::IsForcedInterpreterNeededForCalling(self, this))) { |
| if (IsStatic()) { |
| art::interpreter::EnterInterpreterFromInvoke( |
| self, this, nullptr, args, result, /*stay_in_interpreter*/ true); |
| } else { |
| mirror::Object* receiver = |
| reinterpret_cast<StackReference<mirror::Object>*>(&args[0])->AsMirrorPtr(); |
| art::interpreter::EnterInterpreterFromInvoke( |
| self, this, receiver, args + 1, result, /*stay_in_interpreter*/ true); |
| } |
| } else { |
| DCHECK_EQ(runtime->GetClassLinker()->GetImagePointerSize(), kRuntimePointerSize); |
| |
| constexpr bool kLogInvocationStartAndReturn = false; |
| bool have_quick_code = GetEntryPointFromQuickCompiledCode() != nullptr; |
| if (LIKELY(have_quick_code)) { |
| if (kLogInvocationStartAndReturn) { |
| LOG(INFO) << StringPrintf( |
| "Invoking '%s' quick code=%p static=%d", PrettyMethod().c_str(), |
| GetEntryPointFromQuickCompiledCode(), static_cast<int>(IsStatic() ? 1 : 0)); |
| } |
| |
| // Ensure that we won't be accidentally calling quick compiled code when -Xint. |
| if (kIsDebugBuild && runtime->GetInstrumentation()->IsForcedInterpretOnly()) { |
| CHECK(!runtime->UseJitCompilation()); |
| const void* oat_quick_code = |
| (IsNative() || !IsInvokable() || IsProxyMethod() || IsObsolete()) |
| ? nullptr |
| : GetOatMethodQuickCode(runtime->GetClassLinker()->GetImagePointerSize()); |
| CHECK(oat_quick_code == nullptr || oat_quick_code != GetEntryPointFromQuickCompiledCode()) |
| << "Don't call compiled code when -Xint " << PrettyMethod(); |
| } |
| |
| if (!IsStatic()) { |
| (*art_quick_invoke_stub)(this, args, args_size, self, result, shorty); |
| } else { |
| (*art_quick_invoke_static_stub)(this, args, args_size, self, result, shorty); |
| } |
| if (UNLIKELY(self->GetException() == Thread::GetDeoptimizationException())) { |
| // Unusual case where we were running generated code and an |
| // exception was thrown to force the activations to be removed from the |
| // stack. Continue execution in the interpreter. |
| self->DeoptimizeWithDeoptimizationException(result); |
| } |
| if (kLogInvocationStartAndReturn) { |
| LOG(INFO) << StringPrintf("Returned '%s' quick code=%p", PrettyMethod().c_str(), |
| GetEntryPointFromQuickCompiledCode()); |
| } |
| } else { |
| LOG(INFO) << "Not invoking '" << PrettyMethod() << "' code=null"; |
| if (result != nullptr) { |
| result->SetJ(0); |
| } |
| } |
| } |
| |
| // Pop transition. |
| self->PopManagedStackFragment(fragment); |
| } |
| |
| const void* ArtMethod::RegisterNative(const void* native_method) { |
| CHECK(IsNative()) << PrettyMethod(); |
| CHECK(native_method != nullptr) << PrettyMethod(); |
| void* new_native_method = nullptr; |
| Runtime::Current()->GetRuntimeCallbacks()->RegisterNativeMethod(this, |
| native_method, |
| /*out*/&new_native_method); |
| SetEntryPointFromJni(new_native_method); |
| return new_native_method; |
| } |
| |
| void ArtMethod::UnregisterNative() { |
| CHECK(IsNative()) << PrettyMethod(); |
| // restore stub to lookup native pointer via dlsym |
| SetEntryPointFromJni(GetJniDlsymLookupStub()); |
| } |
| |
| bool ArtMethod::IsOverridableByDefaultMethod() { |
| return GetDeclaringClass()->IsInterface(); |
| } |
| |
| bool ArtMethod::IsPolymorphicSignature() { |
| // Methods with a polymorphic signature have constraints that they |
| // are native and varargs and belong to either MethodHandle or VarHandle. |
| if (!IsNative() || !IsVarargs()) { |
| return false; |
| } |
| mirror::Class* cls = GetDeclaringClass(); |
| return (cls == WellKnownClasses::ToClass(WellKnownClasses::java_lang_invoke_MethodHandle) || |
| cls == WellKnownClasses::ToClass(WellKnownClasses::java_lang_invoke_VarHandle)); |
| } |
| |
| 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 uint8_t* class_data = dex_file.GetClassData(class_def); |
| CHECK(class_data != nullptr); |
| ClassDataItemIterator it(dex_file, class_data); |
| it.SkipAllFields(); |
| // 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(); |
| UNREACHABLE(); |
| } |
| |
| // We use the method's DexFile and declaring class name to find the OatMethod for an obsolete |
| // method. This is extremely slow but we need it if we want to be able to have obsolete native |
| // methods since we need this to find the size of its stack frames. |
| // |
| // NB We could (potentially) do this differently and rely on the way the transformation is applied |
| // in order to use the entrypoint to find this information. However, for debugging reasons (most |
| // notably making sure that new invokes of obsolete methods fail) we choose to instead get the data |
| // directly from the dex file. |
| static const OatFile::OatMethod FindOatMethodFromDexFileFor(ArtMethod* method, bool* found) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(method->IsObsolete() && method->IsNative()); |
| const DexFile* dex_file = method->GetDexFile(); |
| |
| // recreate the class_def_index from the descriptor. |
| std::string descriptor_storage; |
| const DexFile::TypeId* declaring_class_type_id = |
| dex_file->FindTypeId(method->GetDeclaringClass()->GetDescriptor(&descriptor_storage)); |
| CHECK(declaring_class_type_id != nullptr); |
| dex::TypeIndex declaring_class_type_index = dex_file->GetIndexForTypeId(*declaring_class_type_id); |
| const DexFile::ClassDef* declaring_class_type_def = |
| dex_file->FindClassDef(declaring_class_type_index); |
| CHECK(declaring_class_type_def != nullptr); |
| uint16_t declaring_class_def_index = dex_file->GetIndexForClassDef(*declaring_class_type_def); |
| |
| size_t oat_method_index = GetOatMethodIndexFromMethodIndex(*dex_file, |
| declaring_class_def_index, |
| method->GetDexMethodIndex()); |
| |
| OatFile::OatClass oat_class = OatFile::FindOatClass(*dex_file, |
| declaring_class_def_index, |
| found); |
| if (!(*found)) { |
| return OatFile::OatMethod::Invalid(); |
| } |
| return oat_class.GetOatMethod(oat_method_index); |
| } |
| |
| static const OatFile::OatMethod FindOatMethodFor(ArtMethod* method, |
| PointerSize pointer_size, |
| bool* found) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (UNLIKELY(method->IsObsolete())) { |
| // We shouldn't be calling this with obsolete methods except for native obsolete methods for |
| // which we need to use the oat method to figure out how large the quick frame is. |
| DCHECK(method->IsNative()) << "We should only be finding the OatMethod of obsolete methods in " |
| << "order to allow stack walking. Other obsolete methods should " |
| << "never need to access this information."; |
| DCHECK_EQ(pointer_size, kRuntimePointerSize) << "Obsolete method in compiler!"; |
| return FindOatMethodFromDexFileFor(method, 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 { |
| // Compute the oat_method_index by search for its position in the declared virtual methods. |
| oat_method_index = declaring_class->NumDirectMethods(); |
| bool found_virtual = false; |
| for (ArtMethod& art_method : declaring_class->GetVirtualMethods(pointer_size)) { |
| // Check method index instead of identity in case of duplicate method definitions. |
| if (method->GetDexMethodIndex() == art_method.GetDexMethodIndex()) { |
| found_virtual = true; |
| break; |
| } |
| oat_method_index++; |
| } |
| CHECK(found_virtual) << "Didn't find oat method index for virtual method: " |
| << method->PrettyMethod(); |
| } |
| DCHECK_EQ(oat_method_index, |
| GetOatMethodIndexFromMethodIndex(*declaring_class->GetDexCache()->GetDexFile(), |
| method->GetDeclaringClass()->GetDexClassDefIndex(), |
| method->GetDexMethodIndex())); |
| OatFile::OatClass oat_class = OatFile::FindOatClass(*declaring_class->GetDexCache()->GetDexFile(), |
| declaring_class->GetDexClassDefIndex(), |
| found); |
| if (!(*found)) { |
| return OatFile::OatMethod::Invalid(); |
| } |
| return oat_class.GetOatMethod(oat_method_index); |
| } |
| |
| bool ArtMethod::EqualParameters(Handle<mirror::ObjectArray<mirror::Class>> params) { |
| auto* dex_cache = GetDexCache(); |
| auto* dex_file = dex_cache->GetDexFile(); |
| const auto& method_id = dex_file->GetMethodId(GetDexMethodIndex()); |
| const auto& proto_id = dex_file->GetMethodPrototype(method_id); |
| const DexFile::TypeList* proto_params = dex_file->GetProtoParameters(proto_id); |
| auto count = proto_params != nullptr ? proto_params->Size() : 0u; |
| auto param_len = params != nullptr ? params->GetLength() : 0u; |
| if (param_len != count) { |
| return false; |
| } |
| auto* cl = Runtime::Current()->GetClassLinker(); |
| for (size_t i = 0; i < count; ++i) { |
| dex::TypeIndex type_idx = proto_params->GetTypeItem(i).type_idx_; |
| ObjPtr<mirror::Class> type = cl->ResolveType(type_idx, this); |
| if (type == nullptr) { |
| Thread::Current()->AssertPendingException(); |
| return false; |
| } |
| if (type != params->GetWithoutChecks(i)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| ArrayRef<const uint8_t> ArtMethod::GetQuickenedInfo() { |
| const DexFile& dex_file = GetDeclaringClass()->GetDexFile(); |
| const OatFile::OatDexFile* oat_dex_file = dex_file.GetOatDexFile(); |
| if (oat_dex_file == nullptr || (oat_dex_file->GetOatFile() == nullptr)) { |
| return ArrayRef<const uint8_t>(); |
| } |
| return oat_dex_file->GetOatFile()->GetVdexFile()->GetQuickenedInfoOf(dex_file, |
| GetDexMethodIndex()); |
| } |
| |
| uint16_t ArtMethod::GetIndexFromQuickening(uint32_t dex_pc) { |
| ArrayRef<const uint8_t> data = GetQuickenedInfo(); |
| if (data.empty()) { |
| return DexFile::kDexNoIndex16; |
| } |
| QuickenInfoTable table(data); |
| uint32_t quicken_index = 0; |
| for (const DexInstructionPcPair& pair : DexInstructions()) { |
| if (pair.DexPc() == dex_pc) { |
| return table.GetData(quicken_index); |
| } |
| if (QuickenInfoTable::NeedsIndexForInstruction(&pair.Inst())) { |
| ++quicken_index; |
| } |
| } |
| return DexFile::kDexNoIndex16; |
| } |
| |
| const OatQuickMethodHeader* ArtMethod::GetOatQuickMethodHeader(uintptr_t pc) { |
| // Our callers should make sure they don't pass the instrumentation exit pc, |
| // as this method does not look at the side instrumentation stack. |
| DCHECK_NE(pc, reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc())); |
| |
| if (IsRuntimeMethod()) { |
| return nullptr; |
| } |
| |
| Runtime* runtime = Runtime::Current(); |
| const void* existing_entry_point = GetEntryPointFromQuickCompiledCode(); |
| CHECK(existing_entry_point != nullptr) << PrettyMethod() << "@" << this; |
| ClassLinker* class_linker = runtime->GetClassLinker(); |
| |
| if (existing_entry_point == GetQuickProxyInvokeHandler()) { |
| DCHECK(IsProxyMethod() && !IsConstructor()); |
| // The proxy entry point does not have any method header. |
| return nullptr; |
| } |
| |
| // Check whether the current entry point contains this pc. |
| if (!class_linker->IsQuickGenericJniStub(existing_entry_point) && |
| !class_linker->IsQuickResolutionStub(existing_entry_point) && |
| !class_linker->IsQuickToInterpreterBridge(existing_entry_point)) { |
| OatQuickMethodHeader* method_header = |
| OatQuickMethodHeader::FromEntryPoint(existing_entry_point); |
| |
| if (method_header->Contains(pc)) { |
| return method_header; |
| } |
| } |
| |
| // Check whether the pc is in the JIT code cache. |
| jit::Jit* jit = runtime->GetJit(); |
| if (jit != nullptr) { |
| jit::JitCodeCache* code_cache = jit->GetCodeCache(); |
| OatQuickMethodHeader* method_header = code_cache->LookupMethodHeader(pc, this); |
| if (method_header != nullptr) { |
| DCHECK(method_header->Contains(pc)); |
| return method_header; |
| } else { |
| DCHECK(!code_cache->ContainsPc(reinterpret_cast<const void*>(pc))) |
| << PrettyMethod() |
| << ", pc=" << std::hex << pc |
| << ", entry_point=" << std::hex << reinterpret_cast<uintptr_t>(existing_entry_point) |
| << ", copy=" << std::boolalpha << IsCopied() |
| << ", proxy=" << std::boolalpha << IsProxyMethod(); |
| } |
| } |
| |
| // The code has to be in an oat file. |
| bool found; |
| OatFile::OatMethod oat_method = |
| FindOatMethodFor(this, class_linker->GetImagePointerSize(), &found); |
| if (!found) { |
| if (IsNative()) { |
| // We are running the GenericJNI stub. The entrypoint may point |
| // to different entrypoints or to a JIT-compiled JNI stub. |
| DCHECK(class_linker->IsQuickGenericJniStub(existing_entry_point) || |
| class_linker->IsQuickResolutionStub(existing_entry_point) || |
| existing_entry_point == GetQuickInstrumentationEntryPoint() || |
| (jit != nullptr && jit->GetCodeCache()->ContainsPc(existing_entry_point))); |
| return nullptr; |
| } |
| // Only for unit tests. |
| // TODO(ngeoffray): Update these tests to pass the right pc? |
| return OatQuickMethodHeader::FromEntryPoint(existing_entry_point); |
| } |
| const void* oat_entry_point = oat_method.GetQuickCode(); |
| if (oat_entry_point == nullptr || class_linker->IsQuickGenericJniStub(oat_entry_point)) { |
| DCHECK(IsNative()) << PrettyMethod(); |
| return nullptr; |
| } |
| |
| OatQuickMethodHeader* method_header = OatQuickMethodHeader::FromEntryPoint(oat_entry_point); |
| if (pc == 0) { |
| // This is a downcall, it can only happen for a native method. |
| DCHECK(IsNative()); |
| return method_header; |
| } |
| |
| DCHECK(method_header->Contains(pc)) |
| << PrettyMethod() |
| << " " << std::hex << pc << " " << oat_entry_point |
| << " " << (uintptr_t)(method_header->GetCode() + method_header->GetCodeSize()); |
| return method_header; |
| } |
| |
| const void* ArtMethod::GetOatMethodQuickCode(PointerSize pointer_size) { |
| bool found; |
| OatFile::OatMethod oat_method = FindOatMethodFor(this, pointer_size, &found); |
| if (found) { |
| return oat_method.GetQuickCode(); |
| } |
| return nullptr; |
| } |
| |
| bool ArtMethod::HasAnyCompiledCode() { |
| if (IsNative() || !IsInvokable() || IsProxyMethod()) { |
| return false; |
| } |
| |
| // Check whether the JIT has compiled it. |
| Runtime* runtime = Runtime::Current(); |
| jit::Jit* jit = runtime->GetJit(); |
| if (jit != nullptr && jit->GetCodeCache()->ContainsMethod(this)) { |
| return true; |
| } |
| |
| // Check whether we have AOT code. |
| return GetOatMethodQuickCode(runtime->GetClassLinker()->GetImagePointerSize()) != nullptr; |
| } |
| |
| void ArtMethod::CopyFrom(ArtMethod* src, PointerSize image_pointer_size) { |
| memcpy(reinterpret_cast<void*>(this), reinterpret_cast<const void*>(src), |
| Size(image_pointer_size)); |
| declaring_class_ = GcRoot<mirror::Class>(const_cast<ArtMethod*>(src)->GetDeclaringClass()); |
| |
| // If the entry point of the method we are copying from is from JIT code, we just |
| // put the entry point of the new method to interpreter or GenericJNI. We could set |
| // the entry point to the JIT code, but this would require taking the JIT code cache |
| // lock to notify it, which we do not want at this level. |
| Runtime* runtime = Runtime::Current(); |
| if (runtime->UseJitCompilation()) { |
| if (runtime->GetJit()->GetCodeCache()->ContainsPc(GetEntryPointFromQuickCompiledCode())) { |
| SetEntryPointFromQuickCompiledCodePtrSize( |
| src->IsNative() ? GetQuickGenericJniStub() : GetQuickToInterpreterBridge(), |
| image_pointer_size); |
| } |
| } |
| // Clear the profiling info for the same reasons as the JIT code. |
| if (!src->IsNative()) { |
| SetProfilingInfoPtrSize(nullptr, image_pointer_size); |
| } |
| // Clear hotness to let the JIT properly decide when to compile this method. |
| hotness_count_ = 0; |
| } |
| |
| bool ArtMethod::IsImagePointerSize(PointerSize pointer_size) { |
| // Hijack this function to get access to PtrSizedFieldsOffset. |
| // |
| // Ensure that PrtSizedFieldsOffset is correct. We rely here on usually having both 32-bit and |
| // 64-bit builds. |
| static_assert(std::is_standard_layout<ArtMethod>::value, "ArtMethod is not standard layout."); |
| static_assert( |
| (sizeof(void*) != 4) || |
| (offsetof(ArtMethod, ptr_sized_fields_) == PtrSizedFieldsOffset(PointerSize::k32)), |
| "Unexpected 32-bit class layout."); |
| static_assert( |
| (sizeof(void*) != 8) || |
| (offsetof(ArtMethod, ptr_sized_fields_) == PtrSizedFieldsOffset(PointerSize::k64)), |
| "Unexpected 64-bit class layout."); |
| |
| Runtime* runtime = Runtime::Current(); |
| if (runtime == nullptr) { |
| return true; |
| } |
| return runtime->GetClassLinker()->GetImagePointerSize() == pointer_size; |
| } |
| |
| std::string ArtMethod::PrettyMethod(ArtMethod* m, bool with_signature) { |
| if (m == nullptr) { |
| return "null"; |
| } |
| return m->PrettyMethod(with_signature); |
| } |
| |
| std::string ArtMethod::PrettyMethod(bool with_signature) { |
| if (UNLIKELY(IsRuntimeMethod())) { |
| std::string result = GetDeclaringClassDescriptor(); |
| result += '.'; |
| result += GetName(); |
| // Do not add "<no signature>" even if `with_signature` is true. |
| return result; |
| } |
| ArtMethod* m = |
| GetInterfaceMethodIfProxy(Runtime::Current()->GetClassLinker()->GetImagePointerSize()); |
| return m->GetDexFile()->PrettyMethod(m->GetDexMethodIndex(), with_signature); |
| } |
| |
| std::string ArtMethod::JniShortName() { |
| return GetJniShortName(GetDeclaringClassDescriptor(), GetName()); |
| } |
| |
| std::string ArtMethod::JniLongName() { |
| std::string long_name; |
| long_name += JniShortName(); |
| long_name += "__"; |
| |
| std::string signature(GetSignature().ToString()); |
| signature.erase(0, 1); |
| signature.erase(signature.begin() + signature.find(')'), signature.end()); |
| |
| long_name += MangleForJni(signature); |
| |
| return long_name; |
| } |
| |
| // AssertSharedHeld doesn't work in GetAccessFlags, so use a NO_THREAD_SAFETY_ANALYSIS helper. |
| // TODO: Figure out why ASSERT_SHARED_CAPABILITY doesn't work. |
| template <ReadBarrierOption kReadBarrierOption> |
| ALWAYS_INLINE static inline void DoGetAccessFlagsHelper(ArtMethod* method) |
| NO_THREAD_SAFETY_ANALYSIS { |
| CHECK(method->IsRuntimeMethod() || |
| method->GetDeclaringClass<kReadBarrierOption>()->IsIdxLoaded() || |
| method->GetDeclaringClass<kReadBarrierOption>()->IsErroneous()); |
| } |
| |
| template <ReadBarrierOption kReadBarrierOption> void ArtMethod::GetAccessFlagsDCheck() { |
| if (kCheckDeclaringClassState) { |
| Thread* self = Thread::Current(); |
| if (!Locks::mutator_lock_->IsSharedHeld(self)) { |
| if (self->IsThreadSuspensionAllowable()) { |
| ScopedObjectAccess soa(self); |
| CHECK(IsRuntimeMethod() || |
| GetDeclaringClass<kReadBarrierOption>()->IsIdxLoaded() || |
| GetDeclaringClass<kReadBarrierOption>()->IsErroneous()); |
| } |
| } else { |
| // We cannot use SOA in this case. We might be holding the lock, but may not be in the |
| // runnable state (e.g., during GC). |
| Locks::mutator_lock_->AssertSharedHeld(self); |
| DoGetAccessFlagsHelper<kReadBarrierOption>(this); |
| } |
| } |
| } |
| template void ArtMethod::GetAccessFlagsDCheck<ReadBarrierOption::kWithReadBarrier>(); |
| template void ArtMethod::GetAccessFlagsDCheck<ReadBarrierOption::kWithoutReadBarrier>(); |
| |
| } // namespace art |
