1 // Copyright 2019 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_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_ 6 #define V8_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_ 7 8 #include "include/v8.h" 9 #include "src/utils/utils.h" 10 11 namespace v8 { 12 namespace internal { 13 14 class CpuTraceMarkExtension : public v8::Extension { 15 public: CpuTraceMarkExtension(const char * fun_name)16 explicit CpuTraceMarkExtension(const char* fun_name) 17 : v8::Extension("v8/cpumark", 18 BuildSource(buffer_, sizeof(buffer_), fun_name)) {} 19 20 v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate( 21 v8::Isolate* isolate, v8::Local<v8::String> name) override; 22 23 private: 24 static void Mark(const v8::FunctionCallbackInfo<v8::Value>& args); 25 BuildSource(char * buf,size_t size,const char * fun_name)26 static const char* BuildSource(char* buf, size_t size, const char* fun_name) { 27 SNPrintF(Vector<char>(buf, static_cast<int>(size)), "native function %s();", 28 fun_name); 29 return buf; 30 } 31 32 char buffer_[50]; 33 }; 34 35 } // namespace internal 36 } // namespace v8 37 38 #endif // V8_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_ 39