| /* |
| * 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 "arch/context.h" |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/stringpiece.h" |
| #include "class_linker-inl.h" |
| #include "debugger.h" |
| #include "dex_file-inl.h" |
| #include "dex_instruction.h" |
| #include "entrypoints/entrypoint_utils.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 "mapping_table.h" |
| #include "mirror/abstract_method.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/string.h" |
| #include "oat_file-inl.h" |
| #include "scoped_thread_state_change.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| |
| 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*); |
| |
| ArtMethod* ArtMethod::FromReflectedMethod(const ScopedObjectAccessAlreadyRunnable& soa, |
| jobject jlr_method) { |
| auto* abstract_method = soa.Decode<mirror::AbstractMethod*>(jlr_method); |
| DCHECK(abstract_method != nullptr); |
| return abstract_method->GetArtMethod(); |
| } |
| |
| 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(*dex_file, method_id.name_idx_, |
| dex_cache); |
| } |
| |
| InvokeType ArtMethod::GetInvokeType() { |
| // TODO: kSuper? |
| if (GetDeclaringClass()->IsInterface()) { |
| return kInterface; |
| } else if (IsStatic()) { |
| return kStatic; |
| } else if (IsDirect()) { |
| return kDirect; |
| } 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; |
| } |
| |
| static bool HasSameNameAndSignature(ArtMethod* method1, ArtMethod* method2) |
| SHARED_REQUIRES(Locks::mutator_lock_) { |
| ScopedAssertNoThreadSuspension ants(Thread::Current(), "HasSameNameAndSignature"); |
| const DexFile* dex_file = method1->GetDexFile(); |
| const DexFile::MethodId& mid = dex_file->GetMethodId(method1->GetDexMethodIndex()); |
| if (method1->GetDexCache() == method2->GetDexCache()) { |
| const DexFile::MethodId& mid2 = dex_file->GetMethodId(method2->GetDexMethodIndex()); |
| return mid.name_idx_ == mid2.name_idx_ && mid.proto_idx_ == mid2.proto_idx_; |
| } |
| const DexFile* dex_file2 = method2->GetDexFile(); |
| const DexFile::MethodId& mid2 = dex_file2->GetMethodId(method2->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(size_t 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 = mirror::DexCache::GetElementPtrSize(GetDexCacheResolvedMethods(pointer_size), |
| GetDexMethodIndex(), |
| pointer_size); |
| CHECK_EQ(result, |
| Runtime::Current()->GetClassLinker()->FindMethodForProxy(GetDeclaringClass(), this)); |
| } else { |
| mirror::IfTable* iftable = GetDeclaringClass()->GetIfTable(); |
| for (size_t i = 0; i < iftable->Count() && result == nullptr; i++) { |
| mirror::Class* interface = iftable->GetInterface(i); |
| for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| ArtMethod* interface_method = interface->GetVirtualMethod(j, pointer_size); |
| if (HasSameNameAndSignature( |
| this, interface_method->GetInterfaceMethodIfProxy(sizeof(void*)))) { |
| result = interface_method; |
| break; |
| } |
| } |
| } |
| } |
| } |
| DCHECK(result == nullptr || HasSameNameAndSignature( |
| GetInterfaceMethodIfProxy(sizeof(void*)), result->GetInterfaceMethodIfProxy(sizeof(void*)))); |
| 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::StringId* other_descriptor = |
| other_dexfile.FindStringId(mid_declaring_class_descriptor); |
| if (other_descriptor != nullptr) { |
| const DexFile::TypeId* other_type_id = |
| other_dexfile.FindTypeId(other_dexfile.GetIndexForStringId(*other_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 DexFile::kDexNoIndex; |
| } |
| |
| uint32_t ArtMethod::FindCatchBlock(Handle<mirror::Class> exception_type, |
| uint32_t dex_pc, bool* has_no_move_exception) { |
| const DexFile::CodeItem* code_item = GetCodeItem(); |
| // 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 = DexFile::kDexNoIndex; |
| // Iterate over the catch handlers associated with dex_pc. |
| size_t pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); |
| for (CatchHandlerIterator it(*code_item, dex_pc); it.HasNext(); it.Next()) { |
| uint16_t iter_type_idx = it.GetHandlerTypeIndex(); |
| // Catch all case |
| if (iter_type_idx == DexFile::kDexNoIndex16) { |
| found_dex_pc = it.GetHandlerAddress(); |
| break; |
| } |
| // Does this catch exception type apply? |
| mirror::Class* iter_exception_type = GetClassFromTypeIndex(iter_type_idx, |
| true /* resolve */, |
| pointer_size); |
| 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 != DexFile::kDexNoIndex) { |
| const Instruction* first_catch_instr = |
| Instruction::At(&code_item->insns_[found_dex_pc]); |
| *has_no_move_exception = (first_catch_instr->Opcode() != Instruction::MOVE_EXCEPTION); |
| } |
| // Put the exception back. |
| if (exception.Get() != 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(sizeof(void*))->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. |
| if (UNLIKELY(!runtime->IsStarted() || Dbg::IsForcedInterpreterNeededForCalling(self, this))) { |
| if (IsStatic()) { |
| art::interpreter::EnterInterpreterFromInvoke(self, this, nullptr, args, result); |
| } else { |
| mirror::Object* receiver = |
| reinterpret_cast<StackReference<mirror::Object>*>(&args[0])->AsMirrorPtr(); |
| art::interpreter::EnterInterpreterFromInvoke(self, this, receiver, args + 1, result); |
| } |
| } else { |
| DCHECK_EQ(runtime->GetClassLinker()->GetImagePointerSize(), sizeof(void*)); |
| |
| 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(this).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->UseJit()); |
| const void* oat_quick_code = runtime->GetClassLinker()->GetOatMethodQuickCodeFor(this); |
| CHECK(oat_quick_code == nullptr || oat_quick_code != GetEntryPointFromQuickCompiledCode()) |
| << "Don't call compiled code when -Xint " << PrettyMethod(this); |
| } |
| |
| 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->ClearException(); |
| ShadowFrame* shadow_frame = |
| self->PopStackedShadowFrame(StackedShadowFrameType::kDeoptimizationShadowFrame); |
| mirror::Throwable* pending_exception = nullptr; |
| self->PopDeoptimizationContext(result, &pending_exception); |
| self->SetTopOfStack(nullptr); |
| self->SetTopOfShadowStack(shadow_frame); |
| |
| // Restore the exception that was pending before deoptimization then interpret the |
| // deoptimized frames. |
| if (pending_exception != nullptr) { |
| self->SetException(pending_exception); |
| } |
| interpreter::EnterInterpreterFromDeoptimize(self, shadow_frame, result); |
| } |
| if (kLogInvocationStartAndReturn) { |
| LOG(INFO) << StringPrintf("Returned '%s' quick code=%p", PrettyMethod(this).c_str(), |
| GetEntryPointFromQuickCompiledCode()); |
| } |
| } else { |
| LOG(INFO) << "Not invoking '" << PrettyMethod(this) << "' code=null"; |
| if (result != nullptr) { |
| result->SetJ(0); |
| } |
| } |
| } |
| |
| // Pop transition. |
| self->PopManagedStackFragment(fragment); |
| } |
| |
| void ArtMethod::RegisterNative(const void* native_method, bool is_fast) { |
| CHECK(IsNative()) << PrettyMethod(this); |
| CHECK(!IsFastNative()) << PrettyMethod(this); |
| CHECK(native_method != nullptr) << PrettyMethod(this); |
| if (is_fast) { |
| SetAccessFlags(GetAccessFlags() | kAccFastNative); |
| } |
| SetEntryPointFromJni(native_method); |
| } |
| |
| void ArtMethod::UnregisterNative() { |
| CHECK(IsNative() && !IsFastNative()) << PrettyMethod(this); |
| // restore stub to lookup native pointer via dlsym |
| RegisterNative(GetJniDlsymLookupStub(), false); |
| } |
| |
| 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.Get() != nullptr ? params->GetLength() : 0u; |
| if (param_len != count) { |
| return false; |
| } |
| auto* cl = Runtime::Current()->GetClassLinker(); |
| for (size_t i = 0; i < count; ++i) { |
| auto type_idx = proto_params->GetTypeItem(i).type_idx_; |
| auto* type = cl->ResolveType(type_idx, this); |
| if (type == nullptr) { |
| Thread::Current()->AssertPendingException(); |
| return false; |
| } |
| if (type != params->GetWithoutChecks(i)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| ProfilingInfo* ArtMethod::CreateProfilingInfo() { |
| DCHECK(!Runtime::Current()->IsAotCompiler()); |
| ProfilingInfo* info = ProfilingInfo::Create(this); |
| MemberOffset offset = ArtMethod::EntryPointFromJniOffset(sizeof(void*)); |
| uintptr_t pointer = reinterpret_cast<uintptr_t>(this) + offset.Uint32Value(); |
| if (!reinterpret_cast<Atomic<ProfilingInfo*>*>(pointer)-> |
| CompareExchangeStrongSequentiallyConsistent(nullptr, info)) { |
| return GetProfilingInfo(sizeof(void*)); |
| } else { |
| return info; |
| } |
| } |
| |
| const uint8_t* ArtMethod::GetQuickenedInfo() { |
| bool found = false; |
| OatFile::OatMethod oat_method = |
| Runtime::Current()->GetClassLinker()->FindOatMethodFor(this, &found); |
| if (!found || (oat_method.GetQuickCode() != nullptr)) { |
| return nullptr; |
| } |
| return oat_method.GetVmapTable(); |
| } |
| |
| const OatQuickMethodHeader* ArtMethod::GetOatQuickMethodHeader(uintptr_t pc) { |
| if (IsRuntimeMethod() || IsProxyMethod()) { |
| return nullptr; |
| } |
| |
| Runtime* runtime = Runtime::Current(); |
| const void* code = runtime->GetInstrumentation()->GetQuickCodeFor(this, sizeof(void*)); |
| DCHECK(code != nullptr); |
| |
| if (runtime->GetClassLinker()->IsQuickGenericJniStub(code)) { |
| // The generic JNI does not have any method header. |
| return nullptr; |
| } |
| |
| code = EntryPointToCodePointer(code); |
| OatQuickMethodHeader* method_header = reinterpret_cast<OatQuickMethodHeader*>( |
| reinterpret_cast<uintptr_t>(code) - sizeof(OatQuickMethodHeader)); |
| |
| // TODO(ngeoffray): validate the pc. Note that unit tests can give unrelated pcs (for |
| // example arch_test). |
| UNUSED(pc); |
| return method_header; |
| } |
| |
| } // namespace art |
