[VM] Remove support for option --no-preview-dart-2

- option --no-preview-dart-2 will now result in an error
- change aot-assembly build rule to generate AOT snapshot using Dart 2
- generate coresnapshot using Dart 2 (this snapshot is not used yet, next CL which switch the isolate create code to use this snapshot)
- by pass all Dart1 test runs in the status file
- change the default compiler setting in test.py to use dartk
- have test.py not pick up any configuration for --no-preview-dart-2

Change-Id: Ia136943ebfd0fed0c52683b330745b3e2c7a7ce6
Reviewed-on: https://dart-review.googlesource.com/75820
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>

Author: a-siva

runtime/bin/BUILD.gn

@@ -660,13 +660,6 @@ gen_snapshot_action("generate_snapshot_bin") {
   ]
   args = [
     "--deterministic",
-
-    # TODO(asiva) remove these flags once the core snapshot is switched to
-    # dart 2.
-    "--no-strong",
-    "--no-sync-async",
-    "--no-reify-generic-functions",
-
     "--snapshot_kind=" + dart_core_snapshot_kind,
     "--vm_snapshot_data=" + rebase_path(vm_snapshot_data, root_build_dir),
     "--vm_snapshot_instructions=" +

runtime/bin/main.cc

@@ -165,18 +165,16 @@ static void WriteDepsFile(Dart_Isolate isolate) {
     success &= file->Print("%s ", dep);
     free(dep);
   }
-  if (Options::preview_dart_2()) {
-    if (kernel_isolate_is_running) {
-      Dart_KernelCompilationResult result = Dart_KernelListDependencies();
-      if (result.status != Dart_KernelCompilationStatus_Ok) {
-        ErrorExit(
-            kErrorExitCode,
-            "Error: Failed to fetch dependencies from kernel service: %s\n\n",
-            result.error);
-      }
-      success &= file->WriteFully(result.kernel, result.kernel_size);
-      free(result.kernel);
+  if (kernel_isolate_is_running) {
+    Dart_KernelCompilationResult result = Dart_KernelListDependencies();
+    if (result.status != Dart_KernelCompilationStatus_Ok) {
+      ErrorExit(
+          kErrorExitCode,
+          "Error: Failed to fetch dependencies from kernel service: %s\n\n",
+          result.error);
     }
+    success &= file->WriteFully(result.kernel, result.kernel_size);
+    free(result.kernel);
   }
   success &= file->Print("\n");
   if (!success) {
@@ -300,8 +298,8 @@ static Dart_Isolate IsolateSetupHelper(Dart_Isolate isolate,
   CHECK_RESULT(result);
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
-  if (Options::preview_dart_2() && !isolate_run_app_snapshot &&
-      kernel_buffer == NULL && !Dart_IsKernelIsolate(isolate)) {
+  if (!isolate_run_app_snapshot && kernel_buffer == NULL &&
+      !Dart_IsKernelIsolate(isolate)) {
     if (!dfe.CanUseDartFrontend()) {
       const char* format = "Dart frontend unavailable to compile script %s.";
       intptr_t len = snprintf(NULL, 0, format, script_uri) + 1;
@@ -520,9 +518,6 @@ static Dart_Isolate CreateAndSetupServiceIsolate(const char* script_uri,
 #else
   // JIT: Service isolate uses the core libraries snapshot.
   bool skip_library_load = false;
-  const uint8_t* isolate_snapshot_data = core_isolate_snapshot_data;
-  const uint8_t* isolate_snapshot_instructions =
-      core_isolate_snapshot_instructions;
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 
   Dart_Isolate isolate = NULL;
@@ -540,36 +535,28 @@ static Dart_Isolate CreateAndSetupServiceIsolate(const char* script_uri,
   ASSERT(flags != NULL);
   flags->load_vmservice_library = true;
 
-  if (Options::preview_dart_2()) {
-    // If there is intention to use DFE, then we create the isolate
-    // from kernel only if we can.
-    const uint8_t* kernel_buffer = NULL;
-    intptr_t kernel_buffer_size = 0;
-    dfe.LoadPlatform(&kernel_buffer, &kernel_buffer_size);
-    if (kernel_buffer == NULL) {
-      dfe.application_kernel_buffer(&kernel_buffer, &kernel_buffer_size);
-    }
+  // If there is intention to use DFE, then we create the isolate
+  // from kernel only if we can.
+  const uint8_t* kernel_buffer = NULL;
+  intptr_t kernel_buffer_size = 0;
+  dfe.LoadPlatform(&kernel_buffer, &kernel_buffer_size);
+  if (kernel_buffer == NULL) {
+    dfe.application_kernel_buffer(&kernel_buffer, &kernel_buffer_size);
+  }
 
-    // TODO(sivachandra): When the platform program is unavailable, check if
-    // application kernel binary is self contained or an incremental binary.
-    // Isolate should be created only if it is a self contained kernel binary.
-    if (kernel_buffer != NULL) {
-      isolate = Dart_CreateIsolateFromKernel(script_uri, NULL, kernel_buffer,
-                                             kernel_buffer_size, flags,
-                                             isolate_data, error);
-    } else {
-      *error =
-          strdup("Platform kernel not available to create service isolate.");
-      delete isolate_data;
-      return NULL;
-    }
-    skip_library_load = true;
+  // TODO(sivachandra): When the platform program is unavailable, check if
+  // application kernel binary is self contained or an incremental binary.
+  // Isolate should be created only if it is a self contained kernel binary.
+  if (kernel_buffer != NULL) {
+    isolate = Dart_CreateIsolateFromKernel(script_uri, NULL, kernel_buffer,
+                                           kernel_buffer_size, flags,
+                                           isolate_data, error);
   } else {
-    isolate = Dart_CreateIsolate(
-        script_uri, main, isolate_snapshot_data, isolate_snapshot_instructions,
-        app_isolate_shared_data, app_isolate_shared_instructions, flags,
-        isolate_data, error);
+    *error = strdup("Platform kernel not available to create service isolate.");
+    delete isolate_data;
+    return NULL;
   }
+  skip_library_load = true;
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
   if (isolate == NULL) {
     delete isolate_data;
@@ -663,7 +650,7 @@ static Dart_Isolate CreateIsolateAndSetupHelper(bool is_main_isolate,
   Dart_Isolate isolate = NULL;
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
-  if (Options::preview_dart_2() && !isolate_run_app_snapshot) {
+  if (!isolate_run_app_snapshot) {
     const uint8_t* platform_kernel_buffer = NULL;
     intptr_t platform_kernel_buffer_size = 0;
     dfe.LoadPlatform(&platform_kernel_buffer, &platform_kernel_buffer_size);
@@ -891,7 +878,7 @@ bool RunMainIsolate(const char* script_name, CommandLineOptions* dart_options) {
   }
 
   Dart_Isolate isolate = NULL;
-  if (Options::preview_dart_2() && Options::gen_snapshot_kind() == kAppAOT) {
+  if (Options::gen_snapshot_kind() == kAppAOT) {
     isolate = IsolateSetupHelperAotCompilationDart2(
         script_name, "main", Options::package_root(), Options::packages_file(),
         &flags, &error, &exit_code);
@@ -935,12 +922,8 @@ bool RunMainIsolate(const char* script_name, CommandLineOptions* dart_options) {
       // the core snapshot.
       Platform::Exit(kErrorExitCode);
     }
-    if (Options::preview_dart_2()) {
-      Snapshot::GenerateKernel(Options::snapshot_filename(), script_name,
-                               isolate_data->resolved_packages_config());
-    } else {
-      Snapshot::GenerateScript(Options::snapshot_filename());
-    }
+    Snapshot::GenerateKernel(Options::snapshot_filename(), script_name,
+                             isolate_data->resolved_packages_config());
   } else {
     // Lookup the library of the root script.
     Dart_Handle root_lib = Dart_RootLibrary();
@@ -1234,14 +1217,6 @@ void main(int argc, char** argv) {
     // Since we loaded the script anyway, save it.
     dfe.set_application_kernel_buffer(application_kernel_buffer,
                                       application_kernel_buffer_size);
-    // Since we saw a dill file, it means we have to turn on all the
-    // preview_dart_2 options.
-    if (Options::no_preview_dart_2()) {
-      Log::PrintErr(
-          "A kernel file is specified as the input, "
-          "--no-preview-dart-2 option is incompatible with it\n");
-      Platform::Exit(kErrorExitCode);
-    }
     Options::dfe()->set_use_dfe();
   }
 #endif
@@ -1262,9 +1237,8 @@ void main(int argc, char** argv) {
   init_params.entropy_source = DartUtils::EntropySource;
   init_params.get_service_assets = GetVMServiceAssetsArchiveCallback;
 #if !defined(DART_PRECOMPILED_RUNTIME)
-  init_params.start_kernel_isolate = Options::preview_dart_2() &&
-                                     dfe.UseDartFrontend() &&
-                                     dfe.CanUseDartFrontend();
+  init_params.start_kernel_isolate =
+      dfe.UseDartFrontend() && dfe.CanUseDartFrontend();
 #else
   init_params.start_kernel_isolate = false;
 #endif

runtime/bin/main_options.cc

@@ -63,17 +63,9 @@ ENUM_OPTIONS_LIST(ENUM_OPTION_DEFINITION)
 CB_OPTIONS_LIST(CB_OPTION_DEFINITION)
 #undef CB_OPTION_DEFINITION
 
-void Options::SetDart1Options(CommandLineOptions* vm_options) {
-  vm_options->AddArgument("--no-strong");
-  vm_options->AddArgument("--no-reify-generic-functions");
-  vm_options->AddArgument("--no-sync-async");
-}
-
 #if !defined(DART_PRECOMPILED_RUNTIME)
 DFE* Options::dfe_ = NULL;
 
-// TODO(sivachandra): Make it an error to specify --dfe without
-// specifying --preview_dart_2.
 DEFINE_STRING_OPTION_CB(dfe, { Options::dfe()->set_frontend_filename(value); });
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 
@@ -384,13 +376,9 @@ int Options::ParseArguments(int argc,
     }
   }
 
-  if (Options::no_preview_dart_2()) {
-    Options::SetDart1Options(vm_options);
-  } else {
 #if !defined(DART_PRECOMPILED_RUNTIME)
-    Options::dfe()->set_use_dfe();
+  Options::dfe()->set_use_dfe();
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
-  }
   if (Options::deterministic()) {
     // Both an embedder and VM flag.
     vm_options->AddArgument("--deterministic");
@@ -469,9 +457,6 @@ int Options::ParseArguments(int argc,
   }
   if (checked_set) {
     vm_options->AddArgument("--enable-asserts");
-    if (Options::no_preview_dart_2()) {
-      vm_options->AddArgument("--enable-type-checks");
-    }
   }
 
   // If --snapshot is given without --snapshot-kind, default to script snapshot.

runtime/bin/main_options.h

@@ -45,7 +45,6 @@ namespace bin {
   V(short_socket_read, short_socket_read)                                      \
   V(short_socket_write, short_socket_write)                                    \
   V(disable_exit, exit_disabled)                                               \
-  V(no_preview_dart_2, no_preview_dart_2)                                      \
   V(preview_dart_2, nop_option)
 
 // Boolean flags that have a short form.
@@ -111,8 +110,7 @@ class Options {
   CB_OPTIONS_LIST(CB_OPTIONS_DECL)
 #undef CB_OPTIONS_DECL
 
-  static bool preview_dart_2() { return !no_preview_dart_2(); }
-  static void SetDart1Options(CommandLineOptions* vm_options);
+  static bool preview_dart_2() { return true; }
 
   static dart::SimpleHashMap* environment() { return environment_; }
 

runtime/observatory/tests/service/service.status

@@ -79,6 +79,9 @@ async_scope_test: Pass, Slow
 [ $mode == debug && ($arch == simarm || $arch == simarm64) ]
 *: SkipSlow
 
+[ !$preview_dart_2 && ($runtime == dart_precompiled || $runtime == vm) ]
+*: SkipByDesign # Deprecating all Dart1 modes of execution
+
 [ !$strong && ($compiler == dartk || $compiler == dartkp) ]
 *: Skip
 

runtime/tests/vm/dart/snapshot_version_test.dart

@@ -6,10 +6,8 @@ import "dart:io";
 import "package:expect/expect.dart";
 
 main() {
-  var result = Process.runSync(Platform.executable, [
-    '--no-preview-dart-2',
-    Platform.script.resolve('./bad_snapshot').toFilePath()
-  ]);
+  var result = Process.runSync(Platform.executable,
+      [Platform.script.resolve('./bad_snapshot').toFilePath()]);
   print("=== stdout ===\n ${result.stdout}");
   print("=== stderr ===\n ${result.stderr}");
   Expect.equals(253, result.exitCode);

runtime/tests/vm/vm.status

@@ -1,6 +1,7 @@
 # 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.
+
 cc/AllocGeneric_Overflow: Crash, Fail # These tests are expected to crash on all platforms.
 cc/ArrayNew_Overflow_Crash: Crash, Fail # These tests are expected to crash on all platforms.
 cc/CodeImmutability: Crash, Fail # These tests are expected to crash on all platforms.
@@ -20,16 +21,14 @@ cc/Profiler_InliningIntervalBoundry: Skip # Differences in ia32, debug, release
 cc/SNPrint_BadArgs: Crash, Fail # These tests are expected to crash on all platforms.
 dart/data_uri_import_test/none: SkipByDesign
 dart/entrypoints/*: Skip  # Only supported in Dart 2 JIT (hot-reload -> issue 34199).
+dart/snapshot_version_test: Skip # This test is a Dart1 test (script snapshot)
 
 [ $builder_tag == asan ]
 cc/CodeImmutability: Fail, OK # Address Sanitizer turns a crash into a failure.
 
 [ $builder_tag == optimization_counter_threshold ]
 dart/appjit*: SkipByDesign # Test needs to a particular opt-counter value
 
-[ $compiler == app_jit ]
-dart/snapshot_version_test: Fail, OK # Expects to find script snapshot relative to Dart source.
-
 [ $compiler == app_jitk ]
 dart/data_uri_import_test/utf16: MissingRuntimeError
 dart/redirection_type_shuffling_test/none: RuntimeError
@@ -363,3 +362,6 @@ dart/slow_path_shared_stub_test: SkipSlow # Too slow with --slow-path-triggers-g
 dart/spawn_infinite_loop_test: Skip # We can shutdown an isolate before it reloads.
 dart/spawn_shutdown_test: Skip # We can shutdown an isolate before it reloads.
 dart/stack_overflow_shared_test: SkipSlow # Too slow with --slow-path-triggers-gc flag and not relevant outside precompiled.
+
+[ ($runtime == vm || $runtime == dart_precompiled) && !$preview_dart_2 ]
+*:SkipByDesign # Deprecating all Dart1 modes of execution

runtime/vm/unit_test.cc

@@ -39,7 +39,7 @@ const intptr_t platform_strong_dill_size = kPlatformStrongDillSize;
 
 DEFINE_FLAG(bool,
             use_dart_frontend,
-            false,
+            true,
             "Parse scripts with Dart-to-Kernel parser");
 
 DECLARE_FLAG(bool, strong);

samples/samples.status

@@ -23,6 +23,9 @@ sample_extension/test/sample_extension_app_snapshot_test: Pass, RuntimeError # I
 [ $compiler == none && $runtime == vm && $system == fuchsia ]
 *: Skip # Not yet triaged.
 
+[ !$preview_dart_2 && ($runtime == dart_precompiled || $runtime == vm) ]
+*: SkipByDesign # Deprecating all Dart1 modes of execution
+
 [ $compiler == app_jitk || $compiler == dartk || $compiler == dartkb || $compiler == dartkp ]
 sample_extension/test/sample_extension_app_snapshot_test: RuntimeError
 sample_extension/test/sample_extension_script_snapshot_test: RuntimeError