Emit symbol maps for compiled code for use by the Linux perf tool.

runtime/vm/dart.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_DART_H_
 #define VM_DART_H_
 
 #include "include/dart_api.h"
 #include "vm/allocation.h"
 
@@ skipping 11 matching lines @@
                        Dart_IsolateInterruptCallback interrupt,
                        Dart_IsolateShutdownCallback shutdown);
 
   static Isolate* CreateIsolate(const char* name_prefix);
   static RawError* InitializeIsolate(const uint8_t* snapshot, void* data);
   static void ShutdownIsolate();
 
   static Isolate* vm_isolate() { return vm_isolate_; }
   static ThreadPool* thread_pool() { return thread_pool_; }
 
+  static void set_perf_events_writer(Dart_FileWriterFunction writer_function) {
+    perf_events_writer_ = writer_function;
+  }
+  static Dart_FileWriterFunction perf_events_writer() {
+    return perf_events_writer_;
+  }
+
   static void set_pprof_symbol_generator(DebugInfo* value) {
     pprof_symbol_generator_ = value;
   }
   static DebugInfo* pprof_symbol_generator() { return pprof_symbol_generator_; }
 
-  static void set_flow_graph_writer(FileWriterFunction writer_function) {
+  static void set_flow_graph_writer(Dart_FileWriterFunction writer_function) {
     flow_graph_writer_ = writer_function;
   }
-
-  static FileWriterFunction flow_graph_writer() { return flow_graph_writer_; }
+  static Dart_FileWriterFunction flow_graph_writer() {
+    return flow_graph_writer_;
+  }
 
  private:
   static Isolate* vm_isolate_;
   static ThreadPool* thread_pool_;
+  static Dart_FileWriterFunction perf_events_writer_;
   static DebugInfo* pprof_symbol_generator_;
-  static FileWriterFunction flow_graph_writer_;
+  static Dart_FileWriterFunction flow_graph_writer_;
 };
 
 }  // namespace dart
 
 #endif  // VM_DART_H_