Provide stdout and stderr output in the Observatory debugger.

runtime/bin/main.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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 841 matching lines @@
   Dart_Handle args[] = {paths, keys, values};
   Dart_Handle result = Dart_Invoke(io_lib, handler_function_name, 3, args);
   if (Dart_IsError(result)) return ServiceRequestError(result);
   const char *json;
   result = Dart_StringToCString(result, &json);
   if (Dart_IsError(result)) return ServiceRequestError(result);
   return strdup(json);
 }
 
 
+extern bool captureStdio;
+extern bool captureStdout;
+extern bool captureStderr;
+static const char* kStdoutStreamId = "Stdout";
+static const char* kStderrStreamId = "Stderr";
+
+
+static bool ServiceStreamListenCallback(const char* stream_id) {
+  if (strcmp(stream_id, kStdoutStreamId) == 0) {
+    captureStdio = true;
+    captureStdout = true;
+    return true;
+  } else if (strcmp(stream_id, kStderrStreamId) == 0) {
+    captureStdio = true;
+    captureStderr = true;
+    return true;
+  }
+  return false;
+}
+
+
+static void ServiceStreamCancelCallback(const char* stream_id) {
+  if (strcmp(stream_id, kStdoutStreamId) == 0) {
+    captureStdout = false;
+  } else if (strcmp(stream_id, kStderrStreamId) == 0) {
+    captureStderr = false;
+  }
+  captureStdio = (captureStdout || captureStderr);
+}
+
+
 void main(int argc, char** argv) {
   char* script_name;
   const int EXTRA_VM_ARGUMENTS = 2;
   CommandLineOptions vm_options(argc + EXTRA_VM_ARGUMENTS);
   CommandLineOptions dart_options(argc);
   bool print_flags_seen = false;
   bool verbose_debug_seen = false;
 
   vm_options.AddArgument("--no_write_protect_code");
   // Perform platform specific initialization.
@@ skipping 68 matching lines @@
                        DartUtils::WriteFile,
                        DartUtils::CloseFile,
                        DartUtils::EntropySource)) {
     fprintf(stderr, "%s", "VM initialization failed\n");
     fflush(stderr);
     exit(kErrorExitCode);
   }
 
   Dart_RegisterIsolateServiceRequestCallback(
         "getIO", &ServiceGetIOHandler, NULL);
+  Dart_SetServiceStreamCallbacks(&ServiceStreamListenCallback,
+                                 &ServiceStreamCancelCallback);
 
   // Call CreateIsolateAndSetup which creates an isolate and loads up
   // the specified application script.
   char* error = NULL;
   int exit_code = 0;
   char* isolate_name = BuildIsolateName(script_name, "main");
   Dart_Isolate isolate = CreateIsolateAndSetupHelper(script_name,
                                                      "main",
                                                      commandline_package_root,
                                                      NULL,
@@ skipping 124 matching lines @@
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }