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 MemoryTracingInfoMemoryTracingInfo27 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