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Diffstat (limited to 'runtime/art_code.cc')
| -rw-r--r-- | runtime/art_code.cc | 333 |
1 files changed, 0 insertions, 333 deletions
diff --git a/runtime/art_code.cc b/runtime/art_code.cc deleted file mode 100644 index ad0b170079..0000000000 --- a/runtime/art_code.cc +++ /dev/null @@ -1,333 +0,0 @@ -/* - * Copyright (C) 2015 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_code.h" - -#include "art_method.h" -#include "art_method-inl.h" -#include "class_linker.h" -#include "entrypoints/runtime_asm_entrypoints.h" -#include "handle_scope.h" -#include "jit/jit.h" -#include "jit/jit_code_cache.h" -#include "mapping_table.h" -#include "oat.h" -#include "runtime.h" -#include "utils.h" - -namespace art { - - // Converts a dex PC to a native PC. -uintptr_t ArtCode::ToNativeQuickPc(const uint32_t dex_pc, - bool is_for_catch_handler, - bool abort_on_failure) - SHARED_REQUIRES(Locks::mutator_lock_) { - const void* entry_point = GetQuickOatEntryPoint(sizeof(void*)); - if (IsOptimized(sizeof(void*))) { - // Optimized code does not have a mapping table. Search for the dex-to-pc - // mapping in stack maps. - CodeInfo code_info = GetOptimizedCodeInfo(); - StackMapEncoding encoding = code_info.ExtractEncoding(); - - // All stack maps are stored in the same CodeItem section, safepoint stack - // maps first, then catch stack maps. We use `is_for_catch_handler` to select - // the order of iteration. - StackMap stack_map = - LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc, encoding) - : code_info.GetStackMapForDexPc(dex_pc, encoding); - if (stack_map.IsValid()) { - return reinterpret_cast<uintptr_t>(entry_point) + stack_map.GetNativePcOffset(encoding); - } - } else { - MappingTable table((entry_point != nullptr) ? GetMappingTable(sizeof(void*)) : nullptr); - 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) { - return reinterpret_cast<uintptr_t>(entry_point) + 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) { - return reinterpret_cast<uintptr_t>(entry_point) + cur.NativePcOffset(); - } - } - } - - if (abort_on_failure) { - LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc - << " in " << PrettyMethod(method_); - } - return UINTPTR_MAX; -} - -bool ArtCode::IsOptimized(size_t pointer_size) SHARED_REQUIRES(Locks::mutator_lock_) { - // Temporary solution for detecting if a method has been optimized: the compiler - // does not create a GC map. Instead, the vmap table contains the stack map - // (as in stack_map.h). - return !method_->IsNative() - && method_->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size) != nullptr - && GetQuickOatEntryPoint(pointer_size) != nullptr - && GetNativeGcMap(pointer_size) == nullptr; -} - -CodeInfo ArtCode::GetOptimizedCodeInfo() { - DCHECK(IsOptimized(sizeof(void*))); - const void* code_pointer = EntryPointToCodePointer(GetQuickOatEntryPoint(sizeof(void*))); - DCHECK(code_pointer != nullptr); - uint32_t offset = - reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].vmap_table_offset_; - const void* data = - reinterpret_cast<const void*>(reinterpret_cast<const uint8_t*>(code_pointer) - offset); - return CodeInfo(data); -} - -uintptr_t ArtCode::NativeQuickPcOffset(const uintptr_t pc) { - const void* quick_entry_point = GetQuickOatEntryPoint(sizeof(void*)); - CHECK_NE(quick_entry_point, GetQuickToInterpreterBridge()); - CHECK_EQ(quick_entry_point, - Runtime::Current()->GetInstrumentation()->GetQuickCodeFor(method_, sizeof(void*))); - return pc - reinterpret_cast<uintptr_t>(quick_entry_point); -} - -uint32_t ArtCode::ToDexPc(const uintptr_t pc, bool abort_on_failure) { - const void* entry_point = GetQuickOatEntryPoint(sizeof(void*)); - uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point); - if (IsOptimized(sizeof(void*))) { - CodeInfo code_info = GetOptimizedCodeInfo(); - StackMapEncoding encoding = code_info.ExtractEncoding(); - StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset, encoding); - if (stack_map.IsValid()) { - return stack_map.GetDexPc(encoding); - } - } else { - MappingTable table(entry_point != nullptr ? GetMappingTable(sizeof(void*)) : nullptr); - if (table.TotalSize() == 0) { - // NOTE: Special methods (see Mir2Lir::GenSpecialCase()) have an empty mapping - // but they have no suspend checks and, consequently, we never call ToDexPc() for them. - DCHECK(method_->IsNative() || method_->IsCalleeSaveMethod() || method_->IsProxyMethod()) - << PrettyMethod(method_); - return DexFile::kDexNoIndex; // Special no mapping case - } - // 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(); - } - } - } - if (abort_on_failure) { - LOG(FATAL) << "Failed to find Dex offset for PC offset " << reinterpret_cast<void*>(sought_offset) - << "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point - << " current entry_point=" << GetQuickOatEntryPoint(sizeof(void*)) - << ") in " << PrettyMethod(method_); - } - return DexFile::kDexNoIndex; -} - -const uint8_t* ArtCode::GetNativeGcMap(size_t pointer_size) { - const void* code_pointer = EntryPointToCodePointer(GetQuickOatEntryPoint(pointer_size)); - if (code_pointer == nullptr) { - return nullptr; - } - uint32_t offset = - reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].gc_map_offset_; - if (UNLIKELY(offset == 0u)) { - return nullptr; - } - return reinterpret_cast<const uint8_t*>(code_pointer) - offset; -} - -const uint8_t* ArtCode::GetVmapTable(size_t pointer_size) { - CHECK(!IsOptimized(pointer_size)) << "Unimplemented vmap table for optimized compiler"; - const void* code_pointer = EntryPointToCodePointer(GetQuickOatEntryPoint(pointer_size)); - if (code_pointer == nullptr) { - return nullptr; - } - uint32_t offset = - reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].vmap_table_offset_; - if (UNLIKELY(offset == 0u)) { - return nullptr; - } - return reinterpret_cast<const uint8_t*>(code_pointer) - offset; -} - -const uint8_t* ArtCode::GetMappingTable(size_t pointer_size) { - const void* code_pointer = EntryPointToCodePointer(GetQuickOatEntryPoint(pointer_size)); - if (code_pointer == nullptr) { - return nullptr; - } - uint32_t offset = - reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].mapping_table_offset_; - if (UNLIKELY(offset == 0u)) { - return nullptr; - } - return reinterpret_cast<const uint8_t*>(code_pointer) - offset; -} - -// Counts the number of references in the parameter list of the corresponding method. -// Note: Thus does _not_ include "this" for non-static methods. -static uint32_t GetNumberOfReferenceArgsWithoutReceiver(ArtMethod* method) - SHARED_REQUIRES(Locks::mutator_lock_) { - uint32_t shorty_len; - const char* shorty = method->GetShorty(&shorty_len); - uint32_t refs = 0; - for (uint32_t i = 1; i < shorty_len ; ++i) { - if (shorty[i] == 'L') { - refs++; - } - } - return refs; -} - -QuickMethodFrameInfo ArtCode::GetQuickFrameInfo() { - Runtime* runtime = Runtime::Current(); - - if (UNLIKELY(method_->IsAbstract())) { - return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs); - } - - // This goes before IsProxyMethod since runtime methods have a null declaring class. - if (UNLIKELY(method_->IsRuntimeMethod())) { - return runtime->GetRuntimeMethodFrameInfo(method_); - } - - // For Proxy method we add special handling for the direct method case (there is only one - // direct method - constructor). Direct method is cloned from original - // java.lang.reflect.Proxy class together with code and as a result it is executed as usual - // quick compiled method without any stubs. So the frame info should be returned as it is a - // quick method not a stub. However, if instrumentation stubs are installed, the - // instrumentation->GetQuickCodeFor() returns the artQuickProxyInvokeHandler instead of an - // oat code pointer, thus we have to add a special case here. - if (UNLIKELY(method_->IsProxyMethod())) { - if (method_->IsDirect()) { - CHECK(method_->IsConstructor()); - const void* code_pointer = - EntryPointToCodePointer(method_->GetEntryPointFromQuickCompiledCode()); - return reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].frame_info_; - } else { - return runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs); - } - } - - const void* entry_point = runtime->GetInstrumentation()->GetQuickCodeFor(method_, sizeof(void*)); - ClassLinker* class_linker = runtime->GetClassLinker(); - // On failure, instead of null we get the quick-generic-jni-trampoline for native method - // indicating the generic JNI, or the quick-to-interpreter-bridge (but not the trampoline) - // for non-native methods. And we really shouldn't see a failure for non-native methods here. - DCHECK(!class_linker->IsQuickToInterpreterBridge(entry_point)); - - if (class_linker->IsQuickGenericJniStub(entry_point)) { - // Generic JNI frame. - DCHECK(method_->IsNative()); - uint32_t handle_refs = GetNumberOfReferenceArgsWithoutReceiver(method_) + 1; - size_t scope_size = HandleScope::SizeOf(handle_refs); - QuickMethodFrameInfo callee_info = runtime->GetCalleeSaveMethodFrameInfo(Runtime::kRefsAndArgs); - - // Callee saves + handle scope + method ref + alignment - // Note: -sizeof(void*) since callee-save frame stores a whole method pointer. - size_t frame_size = RoundUp(callee_info.FrameSizeInBytes() - sizeof(void*) + - sizeof(ArtMethod*) + scope_size, kStackAlignment); - return QuickMethodFrameInfo(frame_size, callee_info.CoreSpillMask(), callee_info.FpSpillMask()); - } - - const void* code_pointer = EntryPointToCodePointer(entry_point); - return reinterpret_cast<const OatQuickMethodHeader*>(code_pointer)[-1].frame_info_; -} - -void ArtCode::AssertPcIsWithinQuickCode(uintptr_t pc) { - if (method_->IsNative() || method_->IsRuntimeMethod() || method_->IsProxyMethod()) { - return; - } - if (pc == reinterpret_cast<uintptr_t>(GetQuickInstrumentationExitPc())) { - return; - } - const void* code = method_->GetEntryPointFromQuickCompiledCode(); - if (code == GetQuickInstrumentationEntryPoint()) { - return; - } - ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); - if (class_linker->IsQuickToInterpreterBridge(code) || - class_linker->IsQuickResolutionStub(code)) { - return; - } - // If we are the JIT then we may have just compiled the method after the - // IsQuickToInterpreterBridge check. - jit::Jit* const jit = Runtime::Current()->GetJit(); - if (jit != nullptr && - jit->GetCodeCache()->ContainsCodePtr(reinterpret_cast<const void*>(code))) { - return; - } - - uint32_t code_size = reinterpret_cast<const OatQuickMethodHeader*>( - EntryPointToCodePointer(code))[-1].code_size_; - uintptr_t code_start = reinterpret_cast<uintptr_t>(code); - CHECK(code_start <= pc && pc <= (code_start + code_size)) - << PrettyMethod(method_) - << " pc=" << std::hex << pc - << " code=" << code - << " size=" << code_size; -} - -bool ArtCode::PcIsWithinQuickCode(uintptr_t pc) { - /* - * During a stack walk, a return PC may point past-the-end of the code - * in the case that the last instruction is a call that isn't expected to - * return. Thus, we check <= code + GetCodeSize(). - * - * NOTE: For Thumb both pc and code are offset by 1 indicating the Thumb state. - */ - uintptr_t code = reinterpret_cast<uintptr_t>(EntryPointToCodePointer( - method_->GetEntryPointFromQuickCompiledCode())); - if (code == 0) { - return pc == 0; - } - uintptr_t code_size = reinterpret_cast<const OatQuickMethodHeader*>(code)[-1].code_size_; - return code <= pc && pc <= (code + code_size); -} - -const void* ArtCode::GetQuickOatEntryPoint(size_t pointer_size) { - if (method_->IsAbstract() || method_->IsRuntimeMethod() || method_->IsProxyMethod()) { - return nullptr; - } - Runtime* runtime = Runtime::Current(); - ClassLinker* class_linker = runtime->GetClassLinker(); - const void* code = runtime->GetInstrumentation()->GetQuickCodeFor(method_, pointer_size); - // On failure, instead of null we get the quick-generic-jni-trampoline for native method - // indicating the generic JNI, or the quick-to-interpreter-bridge (but not the trampoline) - // for non-native methods. - if (class_linker->IsQuickToInterpreterBridge(code) || - class_linker->IsQuickGenericJniStub(code)) { - return nullptr; - } - return code; -} - -} // namespace art |