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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.
*/
#ifndef ART_RUNTIME_OAT_QUICK_METHOD_HEADER_H_
#define ART_RUNTIME_OAT_QUICK_METHOD_HEADER_H_
#include "arch/instruction_set.h"
#include "base/macros.h"
#include "quick/quick_method_frame_info.h"
#include "stack_map.h"
namespace art {
class ArtMethod;
// OatQuickMethodHeader precedes the raw code chunk generated by the compiler.
class PACKED(4) OatQuickMethodHeader {
public:
OatQuickMethodHeader(uint32_t mapping_table_offset = 0U,
uint32_t vmap_table_offset = 0U,
uint32_t gc_map_offset = 0U,
uint32_t frame_size_in_bytes = 0U,
uint32_t core_spill_mask = 0U,
uint32_t fp_spill_mask = 0U,
uint32_t code_size = 0U);
~OatQuickMethodHeader();
OatQuickMethodHeader& operator=(const OatQuickMethodHeader&) = default;
uintptr_t NativeQuickPcOffset(const uintptr_t pc) const {
return pc - reinterpret_cast<uintptr_t>(GetEntryPoint());
}
bool IsOptimized() const {
return gc_map_offset_ == 0 && vmap_table_offset_ != 0;
}
CodeInfo GetOptimizedCodeInfo() const {
DCHECK(IsOptimized());
const void* data = reinterpret_cast<const void*>(code_ - vmap_table_offset_);
return CodeInfo(data);
}
const uint8_t* GetCode() const {
return code_;
}
const uint8_t* GetNativeGcMap() const {
return (gc_map_offset_ == 0) ? nullptr : code_ - gc_map_offset_;
}
const uint8_t* GetMappingTable() const {
return (mapping_table_offset_ == 0) ? nullptr : code_ - mapping_table_offset_;
}
const uint8_t* GetVmapTable() const {
CHECK(!IsOptimized()) << "Unimplemented vmap table for optimizing compiler";
return (vmap_table_offset_ == 0) ? nullptr : code_ - vmap_table_offset_;
}
bool Contains(uintptr_t pc) const {
uintptr_t code_start = reinterpret_cast<uintptr_t>(code_);
return code_start <= pc && pc <= (code_start + code_size_);
}
const uint8_t* GetEntryPoint() const {
// When the runtime architecture is ARM, `kRuntimeISA` is set to `kArm`
// (not `kThumb2`), *but* we always generate code for the Thumb-2
// instruction set anyway. Thumb-2 requires the entrypoint to be of
// offset 1.
static_assert(kRuntimeISA != kThumb2, "kThumb2 cannot be a runtime ISA");
return (kRuntimeISA == kArm)
? reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(code_) | 1)
: code_;
}
template <bool kCheckFrameSize = true>
uint32_t GetFrameSizeInBytes() {
uint32_t result = frame_info_.FrameSizeInBytes();
if (kCheckFrameSize) {
DCHECK_LE(static_cast<size_t>(kStackAlignment), result);
}
return result;
}
QuickMethodFrameInfo GetFrameInfo() const {
return frame_info_;
}
uintptr_t ToNativeQuickPc(ArtMethod* method,
const uint32_t dex_pc,
bool is_for_catch_handler,
bool abort_on_failure = true) const;
uint32_t ToDexPc(ArtMethod* method, const uintptr_t pc, bool abort_on_failure = true) const;
// The offset in bytes from the start of the mapping table to the end of the header.
uint32_t mapping_table_offset_;
// The offset in bytes from the start of the vmap table to the end of the header.
uint32_t vmap_table_offset_;
// The offset in bytes from the start of the gc map to the end of the header.
uint32_t gc_map_offset_;
// The stack frame information.
QuickMethodFrameInfo frame_info_;
// The code size in bytes.
uint32_t code_size_;
// The actual code.
uint8_t code_[0];
};
} // namespace art
#endif // ART_RUNTIME_OAT_QUICK_METHOD_HEADER_H_
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