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/*
* 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 "oat_quick_method_header.h"
#include "arch/instruction_set.h"
#include "art_method.h"
#include "dex/dex_file_types.h"
#include "interpreter/interpreter_mterp_impl.h"
#include "interpreter/mterp/nterp.h"
#include "nterp_helpers.h"
#include "scoped_thread_state_change-inl.h"
#include "stack_map.h"
#include "thread.h"
namespace art {
uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod** frame,
const uintptr_t pc,
bool abort_on_failure) const {
ArtMethod* method = *frame;
const void* entry_point = GetEntryPoint();
uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
if (method->IsNative()) {
return dex::kDexNoIndex;
} else if (IsNterpMethodHeader()) {
return NterpGetDexPC(frame);
} else {
DCHECK(IsOptimized());
CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
StackMap stack_map = code_info.GetStackMapForNativePcOffset(sought_offset);
if (stack_map.IsValid()) {
return stack_map.GetDexPc();
}
}
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=" << method->GetEntryPointFromQuickCompiledCode()
<< ") in " << method->PrettyMethod();
}
return dex::kDexNoIndex;
}
uintptr_t OatQuickMethodHeader::ToNativeQuickPc(ArtMethod* method,
const uint32_t dex_pc,
bool is_for_catch_handler,
bool abort_on_failure) const {
const void* entry_point = GetEntryPoint();
DCHECK(!method->IsNative());
if (IsNterpMethodHeader()) {
// This should only be called on an nterp frame for getting a catch handler.
CHECK(is_for_catch_handler);
return NterpGetCatchHandler();
}
DCHECK(IsOptimized());
// Search for the dex-to-pc mapping in stack maps.
CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
// 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)
: code_info.GetStackMapForDexPc(dex_pc);
if (stack_map.IsValid()) {
return reinterpret_cast<uintptr_t>(entry_point) +
stack_map.GetNativePcOffset(kRuntimeISA);
}
if (abort_on_failure) {
ScopedObjectAccess soa(Thread::Current());
LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
<< " in " << method->PrettyMethod();
}
return UINTPTR_MAX;
}
static inline OatQuickMethodHeader* GetNterpMethodHeader() {
if (!interpreter::IsNterpSupported()) {
return nullptr;
}
uintptr_t nterp_entrypoint = reinterpret_cast<uintptr_t>(interpreter::GetNterpEntryPoint());
uintptr_t nterp_code_pointer = (kRuntimeISA == InstructionSet::kArm)
// Remove the Thumb mode bit if present on ARM.
? nterp_entrypoint & ~static_cast<uintptr_t>(1)
: nterp_entrypoint;
return reinterpret_cast<OatQuickMethodHeader*>(nterp_code_pointer - sizeof(OatQuickMethodHeader));
}
OatQuickMethodHeader* OatQuickMethodHeader::NterpMethodHeader = GetNterpMethodHeader();
bool OatQuickMethodHeader::IsNterpMethodHeader() const {
return interpreter::IsNterpSupported() ? (this == NterpMethodHeader) : false;
}
} // namespace art
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