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111 lines
4.2 KiB
111 lines
4.2 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "oat_quick_method_header.h"
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#include "arch/instruction_set.h"
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#include "art_method.h"
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#include "dex/dex_file_types.h"
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#include "interpreter/interpreter_mterp_impl.h"
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#include "interpreter/mterp/nterp.h"
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#include "nterp_helpers.h"
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#include "scoped_thread_state_change-inl.h"
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#include "stack_map.h"
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#include "thread.h"
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namespace art {
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uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod** frame,
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const uintptr_t pc,
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bool abort_on_failure) const {
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ArtMethod* method = *frame;
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const void* entry_point = GetEntryPoint();
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uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
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if (method->IsNative()) {
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return dex::kDexNoIndex;
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} else if (IsNterpMethodHeader()) {
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return NterpGetDexPC(frame);
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} else {
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DCHECK(IsOptimized());
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CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
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StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset);
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if (stack_map.IsValid()) {
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return stack_map.GetDexPc();
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}
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}
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if (abort_on_failure) {
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LOG(FATAL) << "Failed to find Dex offset for PC offset "
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<< reinterpret_cast<void*>(sought_offset)
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<< "(PC " << reinterpret_cast<void*>(pc) << ", entry_point=" << entry_point
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<< " current entry_point=" << method->GetEntryPointFromQuickCompiledCode()
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<< ") in " << method->PrettyMethod();
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}
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return dex::kDexNoIndex;
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}
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uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method,
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const uint32_t dex_pc,
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bool is_for_catch_handler,
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bool abort_on_failure) const {
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const void* entry_point = GetEntryPoint();
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DCHECK(!method->IsNative());
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if (IsNterpMethodHeader()) {
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// This should only be called on an nterp frame for getting a catch handler.
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CHECK(is_for_catch_handler);
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return NterpGetCatchHandler();
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}
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DCHECK(IsOptimized());
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// Search for the dex-to-pc mapping in stack maps.
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CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
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// All stack maps are stored in the same CodeItem section, safepoint stack
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// maps first, then catch stack maps. We use `is_for_catch_handler` to select
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// the order of iteration.
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StackMap stack_map =
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LIKELY(is_for_catch_handler) ? code_info.GetCatchStackMapForDexPc(dex_pc)
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: code_info.GetStackMapForDexPc(dex_pc);
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if (stack_map.IsValid()) {
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return reinterpret_cast<uintptr_t>(entry_point) +
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stack_map.GetNativePcOffset(kRuntimeISA);
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}
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if (abort_on_failure) {
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ScopedObjectAccess soa(Thread::Current());
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LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
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<< " in " << method->PrettyMethod();
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}
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return UINTPTR_MAX;
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}
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static inline OatQuickMethodHeader* GetNterpMethodHeader() {
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if (!interpreter::IsNterpSupported()) {
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return nullptr;
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}
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uintptr_t nterp_entrypoint = reinterpret_cast<uintptr_t>(interpreter::GetNterpEntryPoint());
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uintptr_t nterp_code_pointer = (kRuntimeISA == InstructionSet::kArm)
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// Remove the Thumb mode bit if present on ARM.
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? nterp_entrypoint & ~static_cast<uintptr_t>(1)
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: nterp_entrypoint;
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return reinterpret_cast<OatQuickMethodHeader*>(nterp_code_pointer - sizeof(OatQuickMethodHeader));
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}
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OatQuickMethodHeader* OatQuickMethodHeader::NterpMethodHeader = GetNterpMethodHeader();
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bool OatQuickMethodHeader::IsNterpMethodHeader() const {
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return interpreter::IsNterpSupported() ? (this == NterpMethodHeader) : false;
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}
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} // namespace art
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