memory-tracing.h

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// Copyright 2017 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_WASM_MEMORY_TRACING_H_
#define V8_WASM_MEMORY_TRACING_H_
 
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif  // !V8_ENABLE_WEBASSEMBLY
 
#include <cstdint>
 
#include "src/codegen/machine-type.h"
#include "src/wasm/wasm-tier.h"
 
namespace v8::internal::wasm {
 
// This struct is create in generated code, hence use low-level types.
struct MemoryTracingInfo {
  uintptr_t offset;
  uint8_t is_store;  // 0 or 1
  uint8_t mem_rep;
  static_assert(
      std::is_same<decltype(mem_rep),
                   std::underlying_type<MachineRepresentation>::type>::value,
      "MachineRepresentation uses uint8_t");
 
  MemoryTracingInfo(uintptr_t offset, bool is_store, MachineRepresentation rep)
      : offset(offset),
        is_store(is_store),
        mem_rep(static_cast<uint8_t>(rep)) {}
};
 
}  // namespace v8::internal::wasm
 
#endif  // V8_WASM_MEMORY_TRACING_H_