Handle vmservice messages while at breakpoint.

runtime/vm/service_test.cc

+// Copyright (c) 2013, 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 "include/dart_debugger_api.h"
+#include "vm/dart_api_impl.h"
+#include "vm/dart_entry.h"
+#include "vm/debugger.h"
+#include "vm/globals.h"
+#include "vm/message_handler.h"
+#include "vm/os.h"
+#include "vm/port.h"
+#include "vm/service.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+class ServiceTestMessageHandler : public MessageHandler {
+ public:
+  ServiceTestMessageHandler() : _msg(NULL) {}
+
+  ~ServiceTestMessageHandler() {
+    free(_msg);
+  }
+
+  bool HandleMessage(Message* message) {
+    if (_msg != NULL) {
+      free(_msg);
+    }
+
+    // Parse the message.
+    SnapshotReader reader(message->data(), message->len(),
+                          Snapshot::kMessage, Isolate::Current());
+    const Object& response_obj = Object::Handle(reader.ReadObject());
+    String& response = String::Handle();
+    response ^= response_obj.raw();
+    _msg = strdup(response.ToCString());
+    return true;
+  }
+
+  const char* msg() const { return _msg; }
+
+ private:
+  char* _msg;
+};
+
+
+static RawInstance* Eval(Dart_Handle lib, const char* expr) {
+  Dart_Handle result = Dart_EvaluateExpr(lib, NewString(expr));
+  EXPECT_VALID(result);
+  Isolate* isolate = Isolate::Current();
+  const Instance& instance = Api::UnwrapInstanceHandle(isolate, result);
+  return instance.raw();
+}
+
+
+TEST_CASE(Service_DebugBreakpoints) {
+  const char* kScript =
+      "var port;\n"  // Set to our mock port by C++.
+      "\n"
+      "main() {\n"   // We set breakpoint here.
+      "}";
+
+  Isolate* isolate = Isolate::Current();
+  Dart_Handle lib = TestCase::LoadTestScript(kScript, NULL);
+  EXPECT_VALID(lib);
+
+  // 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(lib, NewString("port"), port));
+
+  Instance& service_msg = Instance::Handle();
+
+  // Add a breakpoint.
+  const String& url = String::Handle(String::New(TestCase::url()));
+  isolate->debugger()->SetBreakpointAtLine(url, 3);
+
+  // Get the breakpoint list.
+  service_msg = Eval(lib, "[port, ['debug', 'breakpoints'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ(
+      "{\"type\":\"BreakpointList\",\"breakpoints\":[{"
+          "\"type\":\"Breakpoint\",\"id\":1,\"enabled\":true,"
+          "\"resolved\":false,"
+          "\"location\":{\"type\":\"Location\",\"libId\":12,"
+                        "\"script\":\"dart:test-lib\",\"tokenPos\":5}}]}",
+      handler.msg());
+
+  // Individual breakpoint.
+  service_msg = Eval(lib, "[port, ['debug', 'breakpoints', '1'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ(
+      "{\"type\":\"Breakpoint\",\"id\":1,\"enabled\":true,"
+       "\"resolved\":false,"
+       "\"location\":{\"type\":\"Location\",\"libId\":12,"
+                     "\"script\":\"dart:test-lib\",\"tokenPos\":5}}",
+      handler.msg());
+
+  // Missing sub-command.
+  service_msg = Eval(lib, "[port, ['debug'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ(
+      "{\"type\":\"Error\","
+       "\"text\":\"Must specify a subcommand\","
+       "\"message\":{\"arguments\":[\"debug\"],\"option_keys\":[],"
+                    "\"option_values\":[]}}",
+      handler.msg());
+
+  // Unrecognized breakpoint.
+  service_msg = Eval(lib, "[port, ['debug', 'breakpoints', '1111'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ("{\"type\":\"Error\","
+                "\"text\":\"Unrecognized breakpoint id 1111\","
+                "\"message\":{"
+                    "\"arguments\":[\"debug\",\"breakpoints\",\"1111\"],"
+                    "\"option_keys\":[],\"option_values\":[]}}",
+               handler.msg());
+
+  // Command too long.
+  service_msg =
+      Eval(lib, "[port, ['debug', 'breakpoints', '1111', 'green'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ("{\"type\":\"Error\",\"text\":\"Command too long\","
+                "\"message\":{\"arguments\":[\"debug\",\"breakpoints\","
+                                            "\"1111\",\"green\"],"
+                             "\"option_keys\":[],\"option_values\":[]}}",
+               handler.msg());
+
+  // Unrecognized subcommand.
+  service_msg = Eval(lib, "[port, ['debug', 'nosferatu'], [], []]");
+  Service::HandleServiceMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  EXPECT_STREQ("{\"type\":\"Error\","
+                "\"text\":\"Unrecognized subcommand 'nosferatu'\","
+                "\"message\":{\"arguments\":[\"debug\",\"nosferatu\"],"
+                             "\"option_keys\":[],\"option_values\":[]}}",
+               handler.msg());
+}
+
+}  // namespace dart