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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 <optional>
#ifndef __APPLE__
#include <link.h> // for dl_iterate_phdr.
#endif
#include "arch/instruction_set.h"
#include "art_method.h"
#include "dex/dex_file_types.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 HIDDEN {
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 abort_on_failure) const {
const void* entry_point = GetEntryPoint();
DCHECK(!method->IsNative());
// For catch handlers use the ArrayRef<const uint32_t> version of ToNativeQuickPc.
DCHECK(!IsNterpMethodHeader());
DCHECK(IsOptimized());
// Search for the dex-to-pc mapping in stack maps.
CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
StackMap stack_map = code_info.GetStackMapForDexPc(dex_pc);
if (stack_map.IsValid()) {
return reinterpret_cast<uintptr_t>(entry_point) +
stack_map.GetNativePcOffset(kRuntimeQuickCodeISA);
}
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;
}
uintptr_t OatQuickMethodHeader::ToNativeQuickPcForCatchHandlers(
ArtMethod* method,
ArrayRef<const uint32_t> dex_pc_list,
/* out */ uint32_t* stack_map_row,
bool abort_on_failure) const {
const void* entry_point = GetEntryPoint();
DCHECK(!method->IsNative());
if (IsNterpMethodHeader()) {
return NterpGetCatchHandler();
}
DCHECK(IsOptimized());
// Search for the dex-to-pc mapping in stack maps.
CodeInfo code_info = CodeInfo::DecodeInlineInfoOnly(this);
StackMap stack_map = code_info.GetCatchStackMapForDexPc(dex_pc_list);
*stack_map_row = stack_map.Row();
if (stack_map.IsValid()) {
return reinterpret_cast<uintptr_t>(entry_point) +
stack_map.GetNativePcOffset(kRuntimeQuickCodeISA);
}
if (abort_on_failure) {
std::stringstream ss;
bool first = true;
ss << "Failed to find native offset for dex pcs (from outermost to innermost) " << std::hex;
for (auto dex_pc : dex_pc_list) {
if (!first) {
ss << ", ";
}
first = false;
ss << "0x" << dex_pc;
}
ScopedObjectAccess soa(Thread::Current());
ss << " in " << method->PrettyMethod();
LOG(FATAL) << ss.str();
}
return UINTPTR_MAX;
}
static inline OatQuickMethodHeader* GetNterpMethodHeader() {
if (!interpreter::IsNterpSupported()) {
return nullptr;
}
const void* nterp_entrypoint = interpreter::GetNterpEntryPoint();
uintptr_t nterp_code_pointer =
reinterpret_cast<uintptr_t>(EntryPointToCodePointer(nterp_entrypoint));
return reinterpret_cast<OatQuickMethodHeader*>(nterp_code_pointer - sizeof(OatQuickMethodHeader));
}
OatQuickMethodHeader* OatQuickMethodHeader::NterpMethodHeader = GetNterpMethodHeader();
ArrayRef<const uint8_t> OatQuickMethodHeader::NterpWithClinitImpl =
interpreter::NterpWithClinitImpl();
ArrayRef<const uint8_t> OatQuickMethodHeader::NterpImpl = interpreter::NterpImpl();
bool OatQuickMethodHeader::IsNterpMethodHeader() const {
return interpreter::IsNterpSupported() ? (this == NterpMethodHeader) : false;
}
// Find memory range where all libart code is located in memory.
static ArrayRef<const uint8_t> FindLibartCode() {
ArrayRef<const uint8_t> result;
#ifndef __APPLE__
auto callback = [](dl_phdr_info* info, size_t, void* ctx) {
auto res = reinterpret_cast<decltype(result)*>(ctx);
for (size_t i = 0; i < info->dlpi_phnum; i++) {
if (info->dlpi_phdr[i].p_type == PT_LOAD) {
uintptr_t self = reinterpret_cast<uintptr_t>(Runtime::Current);
uintptr_t code = info->dlpi_addr + info->dlpi_phdr[i].p_vaddr;
uintptr_t size = info->dlpi_phdr[i].p_memsz;
if (code <= self && self - code < size) {
*res = ArrayRef<const uint8_t>(reinterpret_cast<const uint8_t*>(code), size);
return 1; // Stop iteration and return 1 from dl_iterate_phdr.
}
}
}
return 0; // Continue iteration and return 0 from dl_iterate_phdr when finished.
};
bool ok = dl_iterate_phdr(callback, &result) != 0;
CHECK(ok) << "Can not find libart code in memory";
#endif
return result;
}
// Check if the current method header is in libart.
std::optional<bool> OatQuickMethodHeader::IsStub(const uint8_t* pc) {
#ifndef __APPLE__
static ArrayRef<const uint8_t> libart_code = FindLibartCode();
return libart_code.begin() <= pc && pc < libart_code.end();
#else
return std::nullopt;
#endif
}
} // namespace art
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