Clean VM thread shutdown:

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 90 matching lines @@
 static void ErrorExit(int exit_code, const char* format, ...) {
   va_list arguments;
   va_start(arguments, format);
   Log::VPrintErr(format, arguments);
   va_end(arguments);
   fflush(stderr);
 
   Dart_ExitScope();
   Dart_ShutdownIsolate();
 
-  Dart_Cleanup();
+  // Terminate process exit-code handler.
+  Process::TerminateExitCodeHandler();
+
+  char* error = Dart_Cleanup();
+  if (error != NULL) {
+    Log::PrintErr("VM cleanup failed: %s\n", error);
+    free(error);
+  }
 
   exit(exit_code);
 }
 
 
 // The environment provided through the command line using -D options.
 static dart::HashMap* environment = NULL;
 
 static bool IsValidFlag(const char* name,
                         const char* prefix,
@@ skipping 495 matching lines @@
   Dart_Isolate isolate = NULL;
 
   isolate = Dart_CreateIsolate(script_uri,
                                main,
                                isolate_snapshot_buffer,
                                flags,
                                isolate_data,
                                error);
 
   if (isolate == NULL) {
+    delete isolate_data;
     return NULL;
   }
 
   Dart_EnterScope();
 
   if (isolate_snapshot_buffer != NULL) {
     // Setup the native resolver as the snapshot does not carry it.
     Builtin::SetNativeResolver(Builtin::kBuiltinLibrary);
     Builtin::SetNativeResolver(Builtin::kIOLibrary);
   }
@@ skipping 44 matching lines @@
   // Load the script.
   result = DartUtils::LoadScript(script_uri, builtin_lib);
   CHECK_RESULT(result);
 
   // Run event-loop and wait for script loading to complete.
   result = Dart_RunLoop();
   CHECK_RESULT(result);
 
   Platform::SetPackageRoot(package_root);
 
-  DartUtils::SetupIOLibrary(script_uri);
+  result = DartUtils::SetupIOLibrary(script_uri);
+  CHECK_RESULT(result);
 
   // Make the isolate runnable so that it is ready to handle messages.
   Dart_ExitScope();
   Dart_ExitIsolate();
   bool retval = Dart_IsolateMakeRunnable(isolate);
   if (!retval) {
     *error = strdup("Invalid isolate state - Unable to make it runnable");
     Dart_EnterIsolate(isolate);
     Dart_ShutdownIsolate();
     return NULL;
@@ skipping 320 matching lines @@
     bool print_msg = verbose_debug_seen || (debug_port == 0);
     debug_port = DebuggerConnectionHandler::StartHandler(debug_ip, debug_port);
     if (print_msg) {
       Log::Print("Debugger listening on port %d\n", debug_port);
     }
   } else {
     DebuggerConnectionHandler::InitForVmService();
   }
 
   // Initialize the Dart VM.
-  if (!Dart_Initialize(vm_isolate_snapshot_buffer,
-                       CreateIsolateAndSetup, NULL, NULL, ShutdownIsolate,
-                       DartUtils::OpenFile,
-                       DartUtils::ReadFile,
-                       DartUtils::WriteFile,
-                       DartUtils::CloseFile,
-                       DartUtils::EntropySource)) {
-    fprintf(stderr, "%s", "VM initialization failed\n");
+  char* error = Dart_Initialize(vm_isolate_snapshot_buffer,
+      CreateIsolateAndSetup, NULL, NULL, ShutdownIsolate,
+      DartUtils::OpenFile,
+      DartUtils::ReadFile,
+      DartUtils::WriteFile,
+      DartUtils::CloseFile,
+      DartUtils::EntropySource);
+  if (error != NULL) {
+    fprintf(stderr, "VM initialization failed: %s\n", error);
     fflush(stderr);
+    free(error);
     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,
                                                      commandline_packages_file,
                                                      NULL,
                                                      &error,
                                                      &exit_code);
   if (isolate == NULL) {
     Log::PrintErr("%s\n", error);
     free(error);
+    error = NULL;
     delete [] isolate_name;
+    Process::TerminateExitCodeHandler();
+    error = Dart_Cleanup();
+    if (error != NULL) {
+      Log::PrintErr("VM cleanup failed: %s\n", error);
+      free(error);
+    }
     exit((exit_code != 0) ? exit_code : kErrorExitCode);
   }
   delete [] isolate_name;
 
   Dart_EnterIsolate(isolate);
   ASSERT(isolate == Dart_CurrentIsolate());
   ASSERT(isolate != NULL);
   Dart_Handle result;
 
   Dart_EnterScope();
@@ skipping 83 matching lines @@
     result = Dart_RunLoop();
     DartExitOnError(result);
   }
 
   Dart_ExitScope();
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
 
-  Dart_Cleanup();
+  error = Dart_Cleanup();
+  if (error != NULL) {
+    Log::PrintErr("VM cleanup failed: %s\n", error);
+    free(error);
+  }
 
   // Free copied argument strings if converted.
   if (argv_converted) {
     for (int i = 0; i < argc; i++) free(argv[i]);
   }
 
   // Free environment if any.
   if (environment != NULL) {
     for (HashMap::Entry* p = environment->Start();
          p != NULL;
          p = environment->Next(p)) {
       free(p->key);
       free(p->value);
     }
     delete environment;
   }
 
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }