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Diffstat (limited to 'runtime/mirror/abstract_method.cc')
| -rw-r--r-- | runtime/mirror/abstract_method.cc | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/runtime/mirror/abstract_method.cc b/runtime/mirror/abstract_method.cc new file mode 100644 index 0000000000..88a9dc1aa6 --- /dev/null +++ b/runtime/mirror/abstract_method.cc @@ -0,0 +1,347 @@ +/* + * 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 "abstract_method.h" + +#include "abstract_method-inl.h" +#include "base/stringpiece.h" +#include "class-inl.h" +#include "dex_file-inl.h" +#include "gc/accounting/card_table-inl.h" +#include "interpreter/interpreter.h" +#include "jni_internal.h" +#include "object-inl.h" +#include "object_array.h" +#include "object_array-inl.h" +#include "string.h" +#include "object_utils.h" + +namespace art { +namespace mirror { + +extern "C" void art_portable_invoke_stub(AbstractMethod*, uint32_t*, uint32_t, Thread*, JValue*, char); +extern "C" void art_quick_invoke_stub(AbstractMethod*, uint32_t*, uint32_t, Thread*, JValue*, char); + +// TODO: get global references for these +Class* AbstractMethod::java_lang_reflect_Constructor_ = NULL; +Class* AbstractMethod::java_lang_reflect_Method_ = NULL; + +InvokeType AbstractMethod::GetInvokeType() const { + // TODO: kSuper? + if (GetDeclaringClass()->IsInterface()) { + return kInterface; + } else if (IsStatic()) { + return kStatic; + } else if (IsDirect()) { + return kDirect; + } else { + return kVirtual; + } +} + +void AbstractMethod::SetClasses(Class* java_lang_reflect_Constructor, Class* java_lang_reflect_Method) { + CHECK(java_lang_reflect_Constructor_ == NULL); + CHECK(java_lang_reflect_Constructor != NULL); + java_lang_reflect_Constructor_ = java_lang_reflect_Constructor; + + CHECK(java_lang_reflect_Method_ == NULL); + CHECK(java_lang_reflect_Method != NULL); + java_lang_reflect_Method_ = java_lang_reflect_Method; +} + +void AbstractMethod::ResetClasses() { + CHECK(java_lang_reflect_Constructor_ != NULL); + java_lang_reflect_Constructor_ = NULL; + + CHECK(java_lang_reflect_Method_ != NULL); + java_lang_reflect_Method_ = NULL; +} + +void AbstractMethod::SetDexCacheStrings(ObjectArray<String>* new_dex_cache_strings) { + SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_strings_), + new_dex_cache_strings, false); +} + +void AbstractMethod::SetDexCacheResolvedMethods(ObjectArray<AbstractMethod>* new_dex_cache_methods) { + SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_methods_), + new_dex_cache_methods, false); +} + +void AbstractMethod::SetDexCacheResolvedTypes(ObjectArray<Class>* new_dex_cache_classes) { + SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_types_), + new_dex_cache_classes, false); +} + +void AbstractMethod::SetDexCacheInitializedStaticStorage(ObjectArray<StaticStorageBase>* new_value) { + SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_initialized_static_storage_), + new_value, false); +} + +size_t AbstractMethod::NumArgRegisters(const StringPiece& shorty) { + CHECK_LE(1, shorty.length()); + uint32_t num_registers = 0; + for (int 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 AbstractMethod::IsProxyMethod() const { + return GetDeclaringClass()->IsProxyClass(); +} + +AbstractMethod* AbstractMethod::FindOverriddenMethod() const { + if (IsStatic()) { + return NULL; + } + Class* declaring_class = GetDeclaringClass(); + Class* super_class = declaring_class->GetSuperClass(); + uint16_t method_index = GetMethodIndex(); + ObjectArray<AbstractMethod>* super_class_vtable = super_class->GetVTable(); + AbstractMethod* result = NULL; + // Did this method override a super class method? If so load the result from the super class' + // vtable + if (super_class_vtable != NULL && method_index < super_class_vtable->GetLength()) { + result = super_class_vtable->Get(method_index); + } else { + // Method didn't override superclass method so search interfaces + if (IsProxyMethod()) { + result = GetDexCacheResolvedMethods()->Get(GetDexMethodIndex()); + CHECK_EQ(result, + Runtime::Current()->GetClassLinker()->FindMethodForProxy(GetDeclaringClass(), this)); + } else { + MethodHelper mh(this); + MethodHelper interface_mh; + IfTable* iftable = GetDeclaringClass()->GetIfTable(); + for (size_t i = 0; i < iftable->Count() && result == NULL; i++) { + Class* interface = iftable->GetInterface(i); + for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { + AbstractMethod* interface_method = interface->GetVirtualMethod(j); + interface_mh.ChangeMethod(interface_method); + if (mh.HasSameNameAndSignature(&interface_mh)) { + result = interface_method; + break; + } + } + } + } + } +#ifndef NDEBUG + MethodHelper result_mh(result); + DCHECK(result == NULL || MethodHelper(this).HasSameNameAndSignature(&result_mh)); +#endif + return result; +} + +uintptr_t AbstractMethod::NativePcOffset(const uintptr_t pc) const { + const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this); + return pc - reinterpret_cast<uintptr_t>(code); +} + +// Find the lowest-address native safepoint pc for a given dex pc +uintptr_t AbstractMethod::ToFirstNativeSafepointPc(const uint32_t dex_pc) const { +#if !defined(ART_USE_PORTABLE_COMPILER) + const uint32_t* mapping_table = GetPcToDexMappingTable(); + if (mapping_table == NULL) { + DCHECK(IsNative() || IsCalleeSaveMethod() || IsProxyMethod()) << PrettyMethod(this); + return DexFile::kDexNoIndex; // Special no mapping case + } + size_t mapping_table_length = GetPcToDexMappingTableLength(); + for (size_t i = 0; i < mapping_table_length; i += 2) { + if (mapping_table[i + 1] == dex_pc) { + const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this); + return mapping_table[i] + reinterpret_cast<uintptr_t>(code); + } + } + LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc + << " in " << PrettyMethod(this); + return 0; +#else + // Compiler LLVM doesn't use the machine pc, we just use dex pc instead. + return static_cast<uint32_t>(dex_pc); +#endif +} + +uint32_t AbstractMethod::ToDexPc(const uintptr_t pc) const { +#if !defined(ART_USE_PORTABLE_COMPILER) + const uint32_t* mapping_table = GetPcToDexMappingTable(); + if (mapping_table == NULL) { + DCHECK(IsNative() || IsCalleeSaveMethod() || IsProxyMethod()) << PrettyMethod(this); + return DexFile::kDexNoIndex; // Special no mapping case + } + size_t mapping_table_length = GetPcToDexMappingTableLength(); + const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this); + uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(code); + for (size_t i = 0; i < mapping_table_length; i += 2) { + if (mapping_table[i] == sought_offset) { + return mapping_table[i + 1]; + } + } + LOG(FATAL) << "Failed to find Dex offset for PC offset " << reinterpret_cast<void*>(sought_offset) + << "(PC " << reinterpret_cast<void*>(pc) << ", code=" << code + << ") in " << PrettyMethod(this); + return DexFile::kDexNoIndex; +#else + // Compiler LLVM doesn't use the machine pc, we just use dex pc instead. + return static_cast<uint32_t>(pc); +#endif +} + +uintptr_t AbstractMethod::ToNativePc(const uint32_t dex_pc) const { + const uint32_t* mapping_table = GetDexToPcMappingTable(); + if (mapping_table == NULL) { + DCHECK_EQ(dex_pc, 0U); + return 0; // Special no mapping/pc == 0 case + } + size_t mapping_table_length = GetDexToPcMappingTableLength(); + for (size_t i = 0; i < mapping_table_length; i += 2) { + uint32_t map_offset = mapping_table[i]; + uint32_t map_dex_offset = mapping_table[i + 1]; + if (map_dex_offset == dex_pc) { + const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this); + return reinterpret_cast<uintptr_t>(code) + map_offset; + } + } + LOG(FATAL) << "Looking up Dex PC not contained in method, 0x" << std::hex << dex_pc + << " in " << PrettyMethod(this); + return 0; +} + +uint32_t AbstractMethod::FindCatchBlock(Class* exception_type, uint32_t dex_pc) const { + MethodHelper mh(this); + const DexFile::CodeItem* code_item = mh.GetCodeItem(); + // Iterate over the catch handlers associated with dex_pc + 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) { + return it.GetHandlerAddress(); + } + // Does this catch exception type apply? + Class* iter_exception_type = mh.GetDexCacheResolvedType(iter_type_idx); + if (iter_exception_type == NULL) { + // The verifier should take care of resolving all exception classes early + LOG(WARNING) << "Unresolved exception class when finding catch block: " + << mh.GetTypeDescriptorFromTypeIdx(iter_type_idx); + } else if (iter_exception_type->IsAssignableFrom(exception_type)) { + return it.GetHandlerAddress(); + } + } + // Handler not found + return DexFile::kDexNoIndex; +} + +void AbstractMethod::Invoke(Thread* self, uint32_t* args, uint32_t args_size, JValue* result, + char result_type) { + if (kIsDebugBuild) { + self->AssertThreadSuspensionIsAllowable(); + CHECK_EQ(kRunnable, self->GetState()); + } + + // 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 (UNLIKELY(!runtime->IsStarted())){ + LOG(INFO) << "Not invoking " << PrettyMethod(this) << " for a runtime that isn't started"; + if (result != NULL) { + result->SetJ(0); + } + } else { + const bool kLogInvocationStartAndReturn = false; + if (GetEntryPointFromCompiledCode() != NULL) { + if (kLogInvocationStartAndReturn) { + LOG(INFO) << StringPrintf("Invoking '%s' code=%p", PrettyMethod(this).c_str(), GetEntryPointFromCompiledCode()); + } +#ifdef ART_USE_PORTABLE_COMPILER + (*art_portable_invoke_stub)(this, args, args_size, self, result, result_type); +#else + (*art_quick_invoke_stub)(this, args, args_size, self, result, result_type); +#endif + if (UNLIKELY(reinterpret_cast<int32_t>(self->GetException(NULL)) == -1)) { + // Unusual case where we were running LLVM 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->GetAndClearDeoptimizationShadowFrame(result); + self->SetTopOfStack(NULL, 0); + self->SetTopOfShadowStack(shadow_frame); + interpreter::EnterInterpreterFromDeoptimize(self, shadow_frame, result); + } + if (kLogInvocationStartAndReturn) { + LOG(INFO) << StringPrintf("Returned '%s' code=%p", PrettyMethod(this).c_str(), GetEntryPointFromCompiledCode()); + } + } else { + LOG(INFO) << "Not invoking '" << PrettyMethod(this) + << "' code=" << reinterpret_cast<const void*>(GetEntryPointFromCompiledCode()); + if (result != NULL) { + result->SetJ(0); + } + } + } + + // Pop transition. + self->PopManagedStackFragment(fragment); +} + +bool AbstractMethod::IsRegistered() const { + void* native_method = GetFieldPtr<void*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, native_method_), false); + CHECK(native_method != NULL); + void* jni_stub = GetJniDlsymLookupStub(); + return native_method != jni_stub; +} + +void AbstractMethod::RegisterNative(Thread* self, const void* native_method) { + DCHECK(Thread::Current() == self); + CHECK(IsNative()) << PrettyMethod(this); + CHECK(native_method != NULL) << PrettyMethod(this); + if (!self->GetJniEnv()->vm->work_around_app_jni_bugs) { + SetNativeMethod(native_method); + } else { + // We've been asked to associate this method with the given native method but are working + // around JNI bugs, that include not giving Object** SIRT references to native methods. Direct + // the native method to runtime support and store the target somewhere runtime support will + // find it. +#if defined(__arm__) && !defined(ART_USE_PORTABLE_COMPILER) + SetNativeMethod(native_method); +#else + UNIMPLEMENTED(FATAL); +#endif + SetFieldPtr<const uint8_t*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, gc_map_), + reinterpret_cast<const uint8_t*>(native_method), false); + } +} + +void AbstractMethod::UnregisterNative(Thread* self) { + CHECK(IsNative()) << PrettyMethod(this); + // restore stub to lookup native pointer via dlsym + RegisterNative(self, GetJniDlsymLookupStub()); +} + +void AbstractMethod::SetNativeMethod(const void* native_method) { + SetFieldPtr<const void*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, native_method_), + native_method, false); +} + +} // namespace mirror +} // namespace art |