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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 "art_method.h"
#include "mapping_table.h"
#include "scoped_thread_state_change.h"
#include "thread.h"
namespace art {
OatQuickMethodHeader::OatQuickMethodHeader(
uint32_t mapping_table_offset,
uint32_t vmap_table_offset,
uint32_t gc_map_offset,
uint32_t frame_size_in_bytes,
uint32_t core_spill_mask,
uint32_t fp_spill_mask,
uint32_t code_size)
: mapping_table_offset_(mapping_table_offset),
vmap_table_offset_(vmap_table_offset),
gc_map_offset_(gc_map_offset),
frame_info_(frame_size_in_bytes, core_spill_mask, fp_spill_mask),
code_size_(code_size) {}
OatQuickMethodHeader::~OatQuickMethodHeader() {}
uint32_t OatQuickMethodHeader::ToDexPc(ArtMethod* method,
const uintptr_t pc,
bool abort_on_failure) const {
const void* entry_point = GetEntryPoint();
uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(entry_point);
if (IsOptimized()) {
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(GetMappingTable());
// NOTE: Special methods (see Mir2Lir::GenSpecialCase()) have an empty mapping
// but they have no suspend checks and, consequently, we never call ToDexPc() for them.
if (table.TotalSize() == 0) {
DCHECK(method->IsNative());
return DexFile::kDexNoIndex;
}
// 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) {
ScopedObjectAccess soa(Thread::Current());
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 " << PrettyMethod(method);
}
return DexFile::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();
if (IsOptimized()) {
// 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(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) {
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) {
ScopedObjectAccess soa(Thread::Current());
LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc
<< " in " << PrettyMethod(method);
}
return UINTPTR_MAX;
}
} // namespace art
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