unwinding-info-writer.h

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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef V8_COMPILER_BACKEND_UNWINDING_INFO_WRITER_H_
#define V8_COMPILER_BACKEND_UNWINDING_INFO_WRITER_H_
 
#include "src/flags/flags.h"
 
#if V8_TARGET_ARCH_ARM
#include "src/compiler/backend/arm/unwinding-info-writer-arm.h"
#elif V8_TARGET_ARCH_ARM64
#include "src/compiler/backend/arm64/unwinding-info-writer-arm64.h"
#elif V8_TARGET_ARCH_X64
#include "src/compiler/backend/x64/unwinding-info-writer-x64.h"
#elif V8_TARGET_ARCH_S390X
#include "src/compiler/backend/s390/unwinding-info-writer-s390.h"
#elif V8_TARGET_ARCH_PPC64
#include "src/compiler/backend/ppc/unwinding-info-writer-ppc.h"
#else
 
// Placeholder for unsupported architectures.
 
#include "src/base/logging.h"
 
namespace v8 {
namespace internal {
 
class EhFrameWriter;
class Zone;
 
namespace compiler {
 
class InstructionBlock;
 
static_assert(!v8_flags.perf_prof_unwinding_info.value(),
              "--perf-prof-unwinding-info should be statically disabled if not "
              "supported");
 
class UnwindingInfoWriter {
 public:
  explicit UnwindingInfoWriter(Zone*) {}
 
  void SetNumberOfInstructionBlocks(int number) {}
 
  void BeginInstructionBlock(int pc_offset, const InstructionBlock*) {}
 
  void EndInstructionBlock(const InstructionBlock*) {}
 
  void Finish(int code_size) {}
 
  EhFrameWriter* eh_frame_writer() { return nullptr; }
};
 
}  // namespace compiler
}  // namespace internal
}  // namespace v8
 
#endif
 
#endif  // V8_COMPILER_BACKEND_UNWINDING_INFO_WRITER_H_