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/base/optional.h" 11 #include "src/codegen/machine-type.h" 12 #include "src/wasm/wasm-tier.h" 13 14 namespace v8 { 15 namespace internal { 16 namespace wasm { 17 18 // This struct is create in generated code, hence use low-level types. 19 struct MemoryTracingInfo { 20 uintptr_t offset; 21 uint8_t is_store; // 0 or 1 22 uint8_t mem_rep; 23 static_assert( 24 std::is_same<decltype(mem_rep), 25 std::underlying_type<MachineRepresentation>::type>::value, 26 "MachineRepresentation uses uint8_t"); 27 MemoryTracingInfoMemoryTracingInfo28 MemoryTracingInfo(uintptr_t offset, bool is_store, MachineRepresentation rep) 29 : offset(offset), 30 is_store(is_store), 31 mem_rep(static_cast<uint8_t>(rep)) {} 32 }; 33 34 // Callback for tracing a memory operation for debugging. 35 // Triggered by --wasm-trace-memory. 36 V8_EXPORT_PRIVATE void TraceMemoryOperation(base::Optional<ExecutionTier>, 37 const MemoryTracingInfo* info, 38 int func_index, int position, 39 uint8_t* mem_start); 40 41 } // namespace wasm 42 } // namespace internal 43 } // namespace v8 44 45 #endif // V8_WASM_MEMORY_TRACING_H_ 46