Use VM tag in profile and add stack trace trie

runtime/vm/service_test.cc

Index: runtime/vm/service_test.cc
diff --git a/runtime/vm/service_test.cc b/runtime/vm/service_test.cc
index dd244ec9ca598cbab6ee7b2f3e3faf46ab88de23..88d5ef87ac135524ab3f3864450c2c8f0d66d0c3 100644
--- a/runtime/vm/service_test.cc
+++ b/runtime/vm/service_test.cc
@@ -1107,4 +1107,51 @@ TEST_CASE(Service_EmbedderIsolateHandler) {
   EXPECT_STREQ("beta", handler.msg());
 }
 
+TEST_CASE(Service_Profile) {
+  const char* kScript =
+      "var port;\n"  // Set to our mock port by C++.
+      "\n"
+      "var x = 7;\n"
+      "main() {\n"
+      "  x = x * x;\n"
+      "  x = x / 13;\n"
+      "}";
+
+  Isolate* isolate = Isolate::Current();
+  Dart_Handle h_lib = TestCase::LoadTestScript(kScript, NULL);
+  EXPECT_VALID(h_lib);
+  Library& lib = Library::Handle();
+  lib ^= Api::UnwrapHandle(h_lib);
+  EXPECT(!lib.IsNull());
+  Dart_Handle result = Dart_Invoke(h_lib, NewString("main"), 0, NULL);
+  EXPECT_VALID(result);
+
+  // Build a mock message handler and wrap it in a dart port.
+  ServiceTestMessageHandler handler;
+  Dart_Port port_id = PortMap::CreatePort(&handler);
+  Dart_Handle port =
+      Api::NewHandle(isolate, DartLibraryCalls::NewSendPort(port_id));
+  EXPECT_VALID(port);
+  EXPECT_VALID(Dart_SetField(h_lib, NewString("port"), port));
+
+  Instance& service_msg = Instance::Handle();
+  service_msg = Eval(h_lib, "[port, ['profile'], [], []]");
+  Service::HandleIsolateMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  // Expect profile
+  EXPECT_SUBSTRING("\"type\":\"Profile\"", handler.msg());
+
+  service_msg = Eval(h_lib, "[port, ['profile'], ['tags'], ['hide']]");
+  Service::HandleIsolateMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  // Expect profile
+  EXPECT_SUBSTRING("\"type\":\"Profile\"", handler.msg());
+
+  service_msg = Eval(h_lib, "[port, ['profile'], ['tags'], ['hidden']]");
+  Service::HandleIsolateMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  // Expect error.
+  EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
+}
+
 }  // namespace dart