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      1 // Copyright 2017 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef V8_WASM_MEMORY_TRACING_H_
      6 #define V8_WASM_MEMORY_TRACING_H_
      7 
      8 #include <cstdint>
      9 
     10 #include "src/machine-type.h"
     11 #include "src/wasm/wasm-tier.h"
     12 
     13 namespace v8 {
     14 namespace internal {
     15 namespace wasm {
     16 
     17 // This struct is create in generated code, hence use low-level types.
     18 struct MemoryTracingInfo {
     19   uint32_t address;
     20   uint8_t is_store;  // 0 or 1
     21   uint8_t mem_rep;
     22   static_assert(
     23       std::is_same<decltype(mem_rep),
     24                    std::underlying_type<MachineRepresentation>::type>::value,
     25       "MachineRepresentation uses uint8_t");
     26 
     27   MemoryTracingInfo(uint32_t addr, bool is_store, MachineRepresentation rep)
     28       : address(addr), is_store(is_store), mem_rep(static_cast<uint8_t>(rep)) {}
     29 };
     30 
     31 // Callback for tracing a memory operation for debugging.
     32 // Triggered by --wasm-trace-memory.
     33 void TraceMemoryOperation(ExecutionTier, const MemoryTracingInfo* info,
     34                           int func_index, int position, uint8_t* mem_start);
     35 
     36 }  // namespace wasm
     37 }  // namespace internal
     38 }  // namespace v8
     39 
     40 #endif  // V8_WASM_MEMORY_TRACING_H_
     41