1 files changed, 38 insertions, 0 deletions
diff --git a/chromium/v8/src/extensions/cputracemark-extension.h b/chromium/v8/src/extensions/cputracemark-extension.h
new file mode 100644
index 00000000000..9110cfe01b3
--- /dev/null
+++ b/chromium/v8/src/extensions/cputracemark-extension.h
@@ -0,0 +1,38 @@
+// Copyright 2019 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_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_
+#define V8_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_
+
+#include "include/v8.h"
+#include "src/utils/utils.h"
+
+namespace v8 {
+namespace internal {
+
+class CpuTraceMarkExtension : public v8::Extension {
+ public:
+  explicit CpuTraceMarkExtension(const char* fun_name)
+      : v8::Extension("v8/cpumark",
+                      BuildSource(buffer_, sizeof(buffer_), fun_name)) {}
+
+  v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
+      v8::Isolate* isolate, v8::Local<v8::String> name) override;
+
+ private:
+  static void Mark(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+  static const char* BuildSource(char* buf, size_t size, const char* fun_name) {
+    SNPrintF(Vector<char>(buf, static_cast<int>(size)), "native function %s();",
+             fun_name);
+    return buf;
+  }
+
+  char buffer_[50];
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_EXTENSIONS_CPUTRACEMARK_EXTENSION_H_