Add --hot-reload-rollback test mode

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 434 matching lines @@
   vm_options->AddArgument("--reload_every_optimized=false");
   // Reload less frequently as time goes on.
   vm_options->AddArgument("--reload_every_back_off");
   // Ensure that every isolate has reloaded once before exiting.
   vm_options->AddArgument("--check_reloaded");
 
   return true;
 }
 
 
+static bool ProcessHotReloadRollbackTestModeOption(
+      const char* arg,
+      CommandLineOptions* vm_options) {
+  // Identity reload.
+  vm_options->AddArgument("--identity_reload");
+  // Start reloading quickly.
+  vm_options->AddArgument("--reload_every=4");
+  // Reload from optimized and unoptimized code.
+  vm_options->AddArgument("--reload_every_optimized=false");
+  // Reload less frequently as time goes on.
+  vm_options->AddArgument("--reload_every_back_off");
+  // Ensure that every isolate has reloaded once before exiting.
+  vm_options->AddArgument("--check_reloaded");
+  // Force all reloads to fail and execute the rollback code.
+  vm_options->AddArgument("--reload_force_rollback");
+
+  return true;
+}
+
+
 static struct {
   const char* option_name;
   bool (*process)(const char* option, CommandLineOptions* vm_options);
 } main_options[] = {
   // Standard options shared with dart2js.
   { "-D", ProcessEnvironmentOption },
   { "-h", ProcessHelpOption },
   { "--help", ProcessHelpOption },
   { "--packages=", ProcessPackagesOption },
   { "--package-root=", ProcessPackageRootOption },
   { "-v", ProcessVerboseOption },
   { "--verbose", ProcessVerboseOption },
   { "--version", ProcessVersionOption },
 
   // VM specific options to the standalone dart program.
   { "--compile_all", ProcessCompileAllOption },
   { "--enable-vm-service", ProcessEnableVmServiceOption },
   { "--disable-service-origin-check", ProcessDisableServiceOriginCheckOption },
   { "--observe", ProcessObserveOption },
   { "--snapshot=", ProcessSnapshotFilenameOption },
   { "--snapshot-kind=", ProcessSnapshotKindOption },
   { "--run-app-snapshot=", ProcessRunAppSnapshotOption },
   { "--use-blobs", ProcessUseBlobsOption },
   { "--trace-loading", ProcessTraceLoadingOption },
   { "--hot-reload-test-mode", ProcessHotReloadTestModeOption },
+  { "--hot-reload-rollback-test-mode", ProcessHotReloadRollbackTestModeOption },
   { NULL, NULL }
 };
 
 
 static bool ProcessMainOptions(const char* option,
                                CommandLineOptions* vm_options) {
   int i = 0;
   const char* name = main_options[0].option_name;
   int option_length = strlen(option);
   while (name != NULL) {
@@ skipping 1276 matching lines @@
   Platform::Exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }