Refactor java.lang.reflect implementation
Cherry-picked from commit ed41d5c44299ec5d44b8514f6e17f802f48094d1.
Move to ArtMethod/Field instead of AbstractMethod/Field and have
java.lang.reflect APIs delegate to ArtMethod/ArtField.
Bug: 10014286.
Change-Id: Iafc1d8c5b62562c9af8fb9fd8c5e1d61270536e7
diff --git a/runtime/mirror/art_method.cc b/runtime/mirror/art_method.cc
new file mode 100644
index 0000000..cd05f41
--- /dev/null
+++ b/runtime/mirror/art_method.cc
@@ -0,0 +1,342 @@
+/*
+ * 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 "art_method-inl.h"
+#include "base/stringpiece.h"
+#include "class-inl.h"
+#include "dex_file-inl.h"
+#include "dex_instruction.h"
+#include "gc/accounting/card_table-inl.h"
+#include "interpreter/interpreter.h"
+#include "jni_internal.h"
+#include "mapping_table.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(ArtMethod*, uint32_t*, uint32_t, Thread*, JValue*, char);
+extern "C" void art_quick_invoke_stub(ArtMethod*, uint32_t*, uint32_t, Thread*, JValue*, char);
+
+// TODO: get global references for these
+Class* ArtMethod::java_lang_reflect_ArtMethod_ = NULL;
+
+InvokeType ArtMethod::GetInvokeType() const {
+ // TODO: kSuper?
+ if (GetDeclaringClass()->IsInterface()) {
+ return kInterface;
+ } else if (IsStatic()) {
+ return kStatic;
+ } else if (IsDirect()) {
+ return kDirect;
+ } else {
+ return kVirtual;
+ }
+}
+
+void ArtMethod::SetClass(Class* java_lang_reflect_ArtMethod) {
+ CHECK(java_lang_reflect_ArtMethod_ == NULL);
+ CHECK(java_lang_reflect_ArtMethod != NULL);
+ java_lang_reflect_ArtMethod_ = java_lang_reflect_ArtMethod;
+}
+
+void ArtMethod::ResetClass() {
+ CHECK(java_lang_reflect_ArtMethod_ != NULL);
+ java_lang_reflect_ArtMethod_ = NULL;
+}
+
+void ArtMethod::SetDexCacheStrings(ObjectArray<String>* new_dex_cache_strings) {
+ SetFieldObject(OFFSET_OF_OBJECT_MEMBER(ArtMethod, dex_cache_strings_),
+ new_dex_cache_strings, false);
+}
+
+void ArtMethod::SetDexCacheResolvedMethods(ObjectArray<ArtMethod>* new_dex_cache_methods) {
+ SetFieldObject(OFFSET_OF_OBJECT_MEMBER(ArtMethod, dex_cache_resolved_methods_),
+ new_dex_cache_methods, false);
+}
+
+void ArtMethod::SetDexCacheResolvedTypes(ObjectArray<Class>* new_dex_cache_classes) {
+ SetFieldObject(OFFSET_OF_OBJECT_MEMBER(ArtMethod, dex_cache_resolved_types_),
+ new_dex_cache_classes, false);
+}
+
+void ArtMethod::SetDexCacheInitializedStaticStorage(ObjectArray<StaticStorageBase>* new_value) {
+ SetFieldObject(OFFSET_OF_OBJECT_MEMBER(ArtMethod, dex_cache_initialized_static_storage_),
+ new_value, false);
+}
+
+size_t ArtMethod::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 ArtMethod::IsProxyMethod() const {
+ return GetDeclaringClass()->IsProxyClass();
+}
+
+ArtMethod* ArtMethod::FindOverriddenMethod() const {
+ if (IsStatic()) {
+ return NULL;
+ }
+ Class* declaring_class = GetDeclaringClass();
+ Class* super_class = declaring_class->GetSuperClass();
+ uint16_t method_index = GetMethodIndex();
+ ObjectArray<ArtMethod>* super_class_vtable = super_class->GetVTable();
+ ArtMethod* 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) {
+ ArtMethod* 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 ArtMethod::NativePcOffset(const uintptr_t pc) const {
+ const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this);
+ return pc - reinterpret_cast<uintptr_t>(code);
+}
+
+uint32_t ArtMethod::ToDexPc(const uintptr_t pc) const {
+#if !defined(ART_USE_PORTABLE_COMPILER)
+ MappingTable table(GetMappingTable());
+ if (table.TotalSize() == 0) {
+ DCHECK(IsNative() || IsCalleeSaveMethod() || IsProxyMethod()) << PrettyMethod(this);
+ return DexFile::kDexNoIndex; // Special no mapping case
+ }
+ const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this);
+ uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(code);
+ // Assume the caller wants a pc-to-dex mapping so check here first.
+ typedef MappingTable::PcToDexIterator It;
+ for (It cur = table.PcToDexBegin(), end = table.PcToDexEnd(); cur != end; ++cur) {
+ if (cur.NativePcOffset() == sought_offset) {
+ return cur.DexPc();
+ }
+ }
+ // Now check dex-to-pc mappings.
+ typedef MappingTable::DexToPcIterator It2;
+ for (It2 cur = table.DexToPcBegin(), end = table.DexToPcEnd(); cur != end; ++cur) {
+ if (cur.NativePcOffset() == sought_offset) {
+ return cur.DexPc();
+ }
+ }
+ 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 ArtMethod::ToNativePc(const uint32_t dex_pc) const {
+ MappingTable table(GetMappingTable());
+ if (table.TotalSize() == 0) {
+ DCHECK_EQ(dex_pc, 0U);
+ return 0; // Special no mapping/pc == 0 case
+ }
+ // Assume the caller wants a dex-to-pc mapping so check here first.
+ typedef MappingTable::DexToPcIterator It;
+ for (It cur = table.DexToPcBegin(), end = table.DexToPcEnd(); cur != end; ++cur) {
+ if (cur.DexPc() == dex_pc) {
+ const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this);
+ return reinterpret_cast<uintptr_t>(code) + cur.NativePcOffset();
+ }
+ }
+ // Now check pc-to-dex mappings.
+ typedef MappingTable::PcToDexIterator It2;
+ for (It2 cur = table.PcToDexBegin(), end = table.PcToDexEnd(); cur != end; ++cur) {
+ if (cur.DexPc() == dex_pc) {
+ const void* code = Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(this);
+ return reinterpret_cast<uintptr_t>(code) + cur.NativePcOffset();
+ }
+ }
+ LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
+ << " in " << PrettyMethod(this);
+ return 0;
+}
+
+uint32_t ArtMethod::FindCatchBlock(Class* exception_type, uint32_t dex_pc,
+ bool* has_no_move_exception) const {
+ MethodHelper mh(this);
+ const DexFile::CodeItem* code_item = mh.GetCodeItem();
+ // Default to handler not found.
+ uint32_t found_dex_pc = DexFile::kDexNoIndex;
+ // 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) {
+ found_dex_pc = it.GetHandlerAddress();
+ break;
+ }
+ // 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)) {
+ found_dex_pc = it.GetHandlerAddress();
+ break;
+ }
+ }
+ if (found_dex_pc != DexFile::kDexNoIndex) {
+ const Instruction* first_catch_instr =
+ Instruction::At(&mh.GetCodeItem()->insns_[found_dex_pc]);
+ *has_no_move_exception = (first_catch_instr->Opcode() != Instruction::MOVE_EXCEPTION);
+ }
+ return found_dex_pc;
+}
+
+void ArtMethod::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 ArtMethod::IsRegistered() const {
+ void* native_method = GetFieldPtr<void*>(OFFSET_OF_OBJECT_MEMBER(ArtMethod, native_method_), false);
+ CHECK(native_method != NULL);
+ void* jni_stub = GetJniDlsymLookupStub();
+ return native_method != jni_stub;
+}
+
+extern "C" void art_work_around_app_jni_bugs(JNIEnv*, jobject);
+void ArtMethod::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(__i386__)
+ UNIMPLEMENTED(FATAL);
+#else
+ SetNativeMethod(reinterpret_cast<void*>(art_work_around_app_jni_bugs));
+#endif
+ SetFieldPtr<const uint8_t*>(OFFSET_OF_OBJECT_MEMBER(ArtMethod, gc_map_),
+ reinterpret_cast<const uint8_t*>(native_method), false);
+ }
+}
+
+void ArtMethod::UnregisterNative(Thread* self) {
+ CHECK(IsNative()) << PrettyMethod(this);
+ // restore stub to lookup native pointer via dlsym
+ RegisterNative(self, GetJniDlsymLookupStub());
+}
+
+void ArtMethod::SetNativeMethod(const void* native_method) {
+ SetFieldPtr<const void*>(OFFSET_OF_OBJECT_MEMBER(ArtMethod, native_method_),
+ native_method, false);
+}
+
+} // namespace mirror
+} // namespace art