Add API to set thread name

runtime/vm/dart_api_impl_test.cc

 // Copyright (c) 2012, 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.
 
 #include "bin/builtin.h"
 #include "vm/compiler.h"
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 9530 matching lines @@
 
   {
     // Add something to the embedder stream.
     Dart_TimelineEvent("TRACE_EVENT",
                        Dart_TimelineGetMicros(),
                        0,
                        Dart_Timeline_Event_Begin,
                        1,
                        &arg_names[0],
                        &arg_values[0]);
-    // Add metadata to the embedder stream.
-    Dart_TimelineEvent("METADATA_EVENT",
-                       Dart_TimelineGetMicros(),
-                       0,
-                       Dart_Timeline_Event_Metadata,
-                       0,
-                       NULL,
-                       NULL);
     // Add counter to the embedder stream.
     Dart_TimelineEvent("COUNTER_EVENT",
                        Dart_TimelineGetMicros(),
                        0,
                        Dart_Timeline_Event_Counter,
                        0,
                        NULL,
                        NULL);
+    Dart_SetThreadName("CUSTOM THREAD NAME");
   }
 
   // Invoke main, which will be compiled resulting in a compiler event in
   // the timeline.
   Dart_Handle result = Dart_Invoke(lib,
                                    NewString("main"),
                                    0,
                                    NULL);
   EXPECT_VALID(result);
 
@@ skipping 24 matching lines @@
 
   // Heartbeat test.
   EXPECT_SUBSTRING("\"name\":\"TestVMDuration\"", buffer);
   EXPECT_SUBSTRING("\"cat\":\"Compiler\"", buffer);
   EXPECT_SUBSTRING("\"name\":\"CompileFunction\"", buffer);
   EXPECT_SUBSTRING("\"function\":\"::_main\"", buffer);
   EXPECT_NOTSUBSTRING("\"function\":\"::_bar\"", buffer);
   EXPECT_SUBSTRING("TRACE_EVENT", buffer);
   EXPECT_SUBSTRING("arg0", buffer);
   EXPECT_SUBSTRING("value0", buffer);
-  EXPECT_SUBSTRING("METADATA_EVENT", buffer);
   EXPECT_SUBSTRING("COUNTER_EVENT", buffer);
+  EXPECT_SUBSTRING("CUSTOM THREAD NAME", buffer);
 
   // Free buffer allocated by AppendStreamConsumer
   free(data.buffer);
   data.buffer = NULL;
   data.buffer_length = 0;
 
   // Retrieving the global trace resulted in all open blocks being reclaimed.
   // Add some new events and verify that both sets of events are present
   // in the resulting trace.
   {
@@ skipping 385 matching lines @@
   result = Dart_Invoke(lib,
                        NewString("foozoo"),
                        0,
                        NULL);
   EXPECT(Dart_IsError(result));
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart