[vm/concurrency] Add --experimental_enable_isolate_groups_jit flag, make --enable_isolate_groups AOT only.

Issue b/177800357.

TEST=existing test suite
Change-Id: Id6b113932ab7014b8fa6c105845c5c490b60f5e8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/181320
Commit-Queue: Alexander Aprelev <aam@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>

runtime/lib/isolate.cc

@@ -586,7 +586,7 @@ class SpawnIsolateTask : public ThreadPool::Task {
     ASSERT(name != nullptr);
 
     auto group = state_->isolate_group();
-    if (!FLAG_enable_isolate_groups || group == nullptr) {
+    if (!IsolateGroup::AreIsolateGroupsEnabled() || group == nullptr) {
       RunHeavyweight(name);
     } else {
       RunLightweight(name);

runtime/tests/vm/dart/isolates/dart_api_create_lightweight_isolate_test.dart

@@ -4,7 +4,7 @@
 
 // SharedObjects=ffi_test_functions
 // VMOptions=
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:ffi';
@@ -18,8 +18,10 @@ import '../../../../../tests/ffi/calloc.dart';
 import '../../../../../tests/ffi/dylib_utils.dart';
 
 final bool isAOT = Platform.executable.contains('dart_precompiled_runtime');
-final bool isolateGropusEnabled =
+final bool isolateGroupsEnabled =
     Platform.executableArguments.contains('--enable-isolate-groups');
+final bool isolateGroupsEnabledInJIT = Platform.executableArguments
+    .contains('--experimental-enable-isolate-groups-jit');
 final sdkRoot = Platform.script.resolve('../../../../../');
 
 class Isolate extends Opaque {}
@@ -242,13 +244,17 @@ Future testJit() async {
 }
 
 Future main(args) async {
-  if (!isolateGropusEnabled) {
+  if (!isolateGroupsEnabled) {
     await testNotSupported();
     return;
   }
   if (isAOT) {
     await testAot();
   } else {
-    await testJit();
+    if (isolateGroupsEnabledInJIT) {
+      await testJit();
+    } else {
+      await testNotSupported();
+    }
   }
 }

runtime/tests/vm/dart/isolates/fibonacci_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/fibonacci_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/limited_active_mutator_test.dart

@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // SharedObjects=ffi_test_functions
-// VMOptions=--enable-isolate-groups --disable-heap-verification --disable-thread-pool-limit
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification --disable-thread-pool-limit
 
 import 'dart:async';
 import 'dart:math' as math;

runtime/tests/vm/dart/isolates/ring_gc_sendAndExit_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:math' as math;
 

runtime/tests/vm/dart/isolates/ring_gc_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:math' as math;

runtime/tests/vm/dart/isolates/spawn_function_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

runtime/tests/vm/dart/isolates/sum_recursive_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/sum_recursive_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/sum_recursive_tail_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/sum_recursive_tail_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart/isolates/thread_pool_test.dart

@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // SharedObjects=ffi_test_functions
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:ffi';

runtime/tests/vm/dart/issue_31959_31960_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:async';

runtime/tests/vm/dart/sendandexit_test.dart

@@ -2,7 +2,7 @@
 // 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.
 //
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 //
 // Validates functionality of sendAndExit.
 

runtime/tests/vm/dart/spawn_infinite_loop_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

runtime/tests/vm/dart/transferable_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Test that validates that transferables are faster than regular typed data.

runtime/tests/vm/dart/transferable_throws_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Test that ensures correct exceptions are thrown when misusing

runtime/tests/vm/dart_2/isolates/dart_api_create_lightweight_isolate_test.dart

@@ -4,7 +4,7 @@
 
 // SharedObjects=ffi_test_functions
 // VMOptions=
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:ffi';
@@ -18,8 +18,10 @@ import '../../../../../tests/ffi/calloc.dart';
 import '../../../../../tests/ffi/dylib_utils.dart';
 
 final bool isAOT = Platform.executable.contains('dart_precompiled_runtime');
-final bool isolateGropusEnabled =
+final bool isolateGroupsEnabled =
     Platform.executableArguments.contains('--enable-isolate-groups');
+final bool isolateGroupsEnabledInJIT = Platform.executableArguments
+    .contains('--experimental-enable-isolate-groups-jit');
 final sdkRoot = Platform.script.resolve('../../../../../');
 
 class Isolate extends Opaque {}
@@ -242,13 +244,17 @@ Future testJit() async {
 }
 
 Future main(args) async {
-  if (!isolateGropusEnabled) {
+  if (!isolateGroupsEnabled) {
     await testNotSupported();
     return;
   }
   if (isAOT) {
     await testAot();
   } else {
-    await testJit();
+    if (isolateGroupsEnabledInJIT) {
+      await testJit();
+    } else {
+      await testNotSupported();
+    }
   }
 }

runtime/tests/vm/dart_2/isolates/fibonacci_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/fibonacci_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/limited_active_mutator_test.dart

@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // SharedObjects=ffi_test_functions
-// VMOptions=--enable-isolate-groups --disable-heap-verification --disable-thread-pool-limit
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification --disable-thread-pool-limit
 
 import 'dart:async';
 import 'dart:math' as math;

runtime/tests/vm/dart_2/isolates/ring_gc_sendAndExit_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:math' as math;
 

runtime/tests/vm/dart_2/isolates/ring_gc_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:math' as math;

runtime/tests/vm/dart_2/isolates/spawn_function_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

runtime/tests/vm/dart_2/isolates/sum_recursive_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/sum_recursive_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/sum_recursive_tail_call_ig_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/sum_recursive_tail_call_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:isolate';
 

runtime/tests/vm/dart_2/isolates/thread_pool_test.dart

@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // SharedObjects=ffi_test_functions
-// VMOptions=--enable-isolate-groups --disable-heap-verification
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit --disable-heap-verification
 
 import 'dart:async';
 import 'dart:ffi';

runtime/tests/vm/dart_2/issue_31959_31960_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:async';

runtime/tests/vm/dart_2/sendandexit_test.dart

@@ -2,7 +2,7 @@
 // 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.
 //
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 //
 // Validates functionality of sendAndExit.
 

runtime/tests/vm/dart_2/spawn_infinite_loop_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

runtime/tests/vm/dart_2/transferable_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Test that validates that transferables are faster than regular typed data.

runtime/tests/vm/dart_2/transferable_throws_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Test that ensures correct exceptions are thrown when misusing

runtime/vm/compiler/backend/flow_graph_compiler.cc

@@ -209,7 +209,7 @@ bool FlowGraphCompiler::IsUnboxedField(const Field& field) {
   ASSERT(!field.is_non_nullable_integer() || FLAG_precompiled_mode);
   // Unboxed fields in JIT lightweight isolates mode are not supported yet.
   const bool valid_class =
-      (FLAG_precompiled_mode || !FLAG_enable_isolate_groups) &&
+      (FLAG_precompiled_mode || !IsolateGroup::AreIsolateGroupsEnabled()) &&
       ((SupportsUnboxedDoubles() && (field.guarded_cid() == kDoubleCid)) ||
        (SupportsUnboxedSimd128() && (field.guarded_cid() == kFloat32x4Cid)) ||
        (SupportsUnboxedSimd128() && (field.guarded_cid() == kFloat64x2Cid)) ||
@@ -225,7 +225,8 @@ bool FlowGraphCompiler::IsPotentialUnboxedField(const Field& field) {
     return IsUnboxedField(field);
   }
   // Unboxed fields in JIT lightweight isolates mode are not supported yet.
-  return !FLAG_enable_isolate_groups && field.is_unboxing_candidate() &&
+  return !IsolateGroup::AreIsolateGroupsEnabled() &&
+         field.is_unboxing_candidate() &&
          (FlowGraphCompiler::IsUnboxedField(field) ||
           (field.guarded_cid() == kIllegalCid));
 }

runtime/vm/compiler/jit/compiler.cc

@@ -212,7 +212,7 @@ DEFINE_RUNTIME_ENTRY(CompileFunction, 1) {
   ASSERT(thread->IsMutatorThread());
   const Function& function = Function::CheckedHandle(zone, arguments.ArgAt(0));
 
-  if (FLAG_enable_isolate_groups) {
+  if (IsolateGroup::AreIsolateGroupsEnabled()) {
     // Another isolate's mutator thread may have created [function] and
     // published it via an ICData, MegamorphicCache etc. Entering the lock below
     // is an acquire operation that pairs with the release operation when the
@@ -225,7 +225,7 @@ DEFINE_RUNTIME_ENTRY(CompileFunction, 1) {
   // there's no existing code. In multi-isolate scenarios with shared JITed code
   // we can end up in the lazy compile runtime entry here with code being
   // installed.
-  ASSERT(!function.HasCode() || FLAG_enable_isolate_groups);
+  ASSERT(!function.HasCode() || IsolateGroup::AreIsolateGroupsEnabled());
 
   // Will throw if compilation failed (e.g. with compile-time error).
   function.EnsureHasCode();

runtime/vm/dart_api_impl.cc

@@ -1408,7 +1408,7 @@ Dart_CreateIsolateInGroup(Dart_Isolate group_member,
 
   *error = nullptr;
 
-  if (!FLAG_enable_isolate_groups) {
+  if (!IsolateGroup::AreIsolateGroupsEnabled()) {
     *error = Utils::StrDup(
         "Lightweight isolates are only implemented in AOT "
         "mode and need to be explicitly enabled by passing "

runtime/vm/flag_list.h

@@ -189,7 +189,12 @@ constexpr bool kDartUseBackgroundCompilation = true;
   P(retain_function_objects, bool, true,                                       \
     "Serialize function objects for all code objects even if not otherwise "   \
     "needed in the precompiled runtime.")                                      \
-  P(enable_isolate_groups, bool, false, "Enable isolate group support.")       \
+  P(enable_isolate_groups, bool, false,                                        \
+    "Enable isolate group support in AOT.")                                    \
+  P(experimental_enable_isolate_groups_jit, bool, false,                       \
+    "As an experimental feature enable isolate group support in JIT"           \
+    "(goes into effect only when enable_isolate_groups is turned on as "       \
+    "well).")                                                                  \
   P(show_invisible_frames, bool, false,                                        \
     "Show invisible frames in stack traces.")                                  \
   R(support_il_printer, false, bool, true, "Support the IL printer.")          \

runtime/vm/flags.cc

@@ -5,6 +5,7 @@
 #include "vm/flags.h"
 
 #include "platform/assert.h"
+#include "vm/isolate.h"
 #include "vm/json_stream.h"
 #include "vm/os.h"
 
@@ -472,7 +473,7 @@ char* Flags::ProcessCommandLineFlags(int number_of_vm_flags,
   // graudally remove those restrictions.
 
 #if !defined(DART_PRCOMPILED_RUNTIME)
-  if (!FLAG_precompiled_mode && FLAG_enable_isolate_groups) {
+  if (!FLAG_precompiled_mode && IsolateGroup::AreIsolateGroupsEnabled()) {
     // Our compiler should not make rely on a global field being initialized at
     // compile-time, since that compiled code might be re-used in another
     // isolate that has not yet initialized the global field.

runtime/vm/heap/heap_test.cc

@@ -576,7 +576,7 @@ class MergeIsolatesHeapsHandler : public MessageHandler {
 
 VM_UNIT_TEST_CASE(CleanupBequestNeverReceived) {
   // This test uses features from isolate groups
-  FLAG_enable_isolate_groups = true;
+  IsolateGroup::ForceEnableIsolateGroupsForTesting();
 
   const char* TEST_MESSAGE = "hello, world";
   Dart_Isolate parent = TestCase::CreateTestIsolate("parent");
@@ -611,7 +611,7 @@ VM_UNIT_TEST_CASE(CleanupBequestNeverReceived) {
 
 VM_UNIT_TEST_CASE(ReceivesSendAndExitMessage) {
   // This test uses features from isolate groups
-  FLAG_enable_isolate_groups = true;
+  IsolateGroup::ForceEnableIsolateGroupsForTesting();
 
   const char* TEST_MESSAGE = "hello, world";
   Dart_Isolate parent = TestCase::CreateTestIsolate("parent");

runtime/vm/heap/verifier.cc

@@ -104,7 +104,7 @@ void VerifyCanonicalVisitor::VisitObject(ObjectPtr obj) {
   // other isolates. We should either scan live objects from the roots of each
   // individual isolate, or wait until we are ready to share constants across
   // isolates.
-  if (!FLAG_enable_isolate_groups || FLAG_precompiled_mode) {
+  if (!IsolateGroup::AreIsolateGroupsEnabled() || FLAG_precompiled_mode) {
     if ((obj->GetClassId() >= kInstanceCid) &&
         (obj->GetClassId() != kTypeArgumentsCid)) {
       if (obj->untag()->IsCanonical()) {

runtime/vm/isolate.cc

@@ -1984,7 +1984,7 @@ bool IsolateGroup::ReloadSources(JSONStream* js,
   ASSERT(!IsReloading());
 
   // TODO(dartbug.com/36097): Support multiple isolates within an isolate group.
-  RELEASE_ASSERT(!FLAG_enable_isolate_groups);
+  RELEASE_ASSERT(!IsolateGroup::AreIsolateGroupsEnabled());
   RELEASE_ASSERT(isolates_.First() == isolates_.Last());
   RELEASE_ASSERT(isolates_.First() == Isolate::Current());
 
@@ -2017,7 +2017,7 @@ bool IsolateGroup::ReloadKernel(JSONStream* js,
   ASSERT(!IsReloading());
 
   // TODO(dartbug.com/36097): Support multiple isolates within an isolate group.
-  RELEASE_ASSERT(!FLAG_enable_isolate_groups);
+  RELEASE_ASSERT(!IsolateGroup::AreIsolateGroupsEnabled());
   RELEASE_ASSERT(isolates_.First() == isolates_.Last());
   RELEASE_ASSERT(isolates_.First() == Isolate::Current());
 
@@ -2534,7 +2534,7 @@ void Isolate::LowLevelCleanup(Isolate* isolate) {
       Dart::thread_pool()->Run<ShutdownGroupTask>(isolate_group);
     }
   } else {
-    if (FLAG_enable_isolate_groups) {
+    if (IsolateGroup::AreIsolateGroupsEnabled()) {
       // TODO(dartbug.com/36097): An isolate just died. A significant amount of
       // memory might have become unreachable. We should evaluate how to best
       // inform the GC about this situation.
@@ -2696,7 +2696,7 @@ void IsolateGroup::RunWithStoppedMutatorsCallable(
     bool use_force_growth_in_otherwise) {
   auto thread = Thread::Current();
 
-  if (thread->IsMutatorThread() && !FLAG_enable_isolate_groups) {
+  if (thread->IsMutatorThread() && !IsolateGroup::AreIsolateGroupsEnabled()) {
     single_current_mutator->Call();
     return;
   }

runtime/vm/isolate.h

@@ -708,6 +708,20 @@ class IsolateGroup : public IntrusiveDListEntry<IsolateGroup> {
 
   void RegisterStaticField(const Field& field, const Instance& initial_value);
 
+  static bool AreIsolateGroupsEnabled() {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return FLAG_enable_isolate_groups;
+#else
+    return FLAG_enable_isolate_groups &&
+           FLAG_experimental_enable_isolate_groups_jit;
+#endif
+  }
+
+  static void ForceEnableIsolateGroupsForTesting() {
+    FLAG_enable_isolate_groups = true;
+    FLAG_experimental_enable_isolate_groups_jit = true;
+  }
+
  private:
   friend class Dart;  // For `object_store_ = ` in Dart::Init
   friend class Heap;

runtime/vm/isolate_reload.cc

@@ -565,7 +565,7 @@ bool IsolateGroupReloadContext::Reload(bool force_reload,
   // All isolates within an isolate group need to share one heap.
   // TODO(dartbug.com/36097): Remove this assert once the shared heap CL has
   // landed.
-  RELEASE_ASSERT(!FLAG_enable_isolate_groups);
+  RELEASE_ASSERT(!IsolateGroup::AreIsolateGroupsEnabled());
   Heap* heap = IG->heap();
 
   num_old_libs_ =

runtime/vm/runtime_entry.cc

@@ -685,7 +685,7 @@ static void UpdateTypeTestCache(
         new_cache.WriteEntryToBuffer(zone, &buffer, colliding_index, "      ");
         OS::PrintErr("%s\n", buffer.buffer());
       }
-      if (!FLAG_enable_isolate_groups) {
+      if (!IsolateGroup::AreIsolateGroupsEnabled()) {
         FATAL("Duplicate subtype test cache entry");
       }
       if (old_result.ptr() != result.ptr()) {
@@ -1048,7 +1048,7 @@ DEFINE_RUNTIME_ENTRY(PatchStaticCall, 0) {
   const Code& target_code = Code::Handle(zone, target_function.EnsureHasCode());
   // Before patching verify that we are not repeatedly patching to the same
   // target.
-  ASSERT(FLAG_enable_isolate_groups ||
+  ASSERT(IsolateGroup::AreIsolateGroupsEnabled() ||
          target_code.ptr() != CodePatcher::GetStaticCallTargetAt(
                                   caller_frame->pc(), caller_code));
   if (target_code.ptr() !=

runtime/vm/symbols.cc

@@ -366,7 +366,7 @@ StringPtr Symbols::NewSymbol(Thread* thread, const StringType& str) {
       // TODO(https://dartbug.com/41943): Get rid of the symbol table accesses
       // within safepoint operation scope.
       RELEASE_ASSERT(group->safepoint_handler()->IsOwnedByTheThread(thread));
-      RELEASE_ASSERT(FLAG_enable_isolate_groups || !USING_PRODUCT);
+      RELEASE_ASSERT(IsolateGroup::AreIsolateGroupsEnabled() || !USING_PRODUCT);
 
       // Uncommon case: We are at a safepoint, all mutators are stopped and we
       // have therefore exclusive access to the symbol table.
@@ -395,7 +395,7 @@ StringPtr Symbols::NewSymbol(Thread* thread, const StringType& str) {
         };
 
         SafepointWriteRwLocker sl(thread, group->symbols_lock());
-        if (FLAG_enable_isolate_groups || !USING_PRODUCT) {
+        if (IsolateGroup::AreIsolateGroupsEnabled() || !USING_PRODUCT) {
           // NOTE: Strictly speaking we should use a safepoint operation scope
           // here to ensure the lock-free usage inside safepoint operations (see
           // above) is safe. Though this would really kill the performance.
@@ -440,7 +440,7 @@ StringPtr Symbols::Lookup(Thread* thread, const StringType& str) {
       // In DEBUG mode the snapshot writer also calls this method inside a
       // safepoint.
 #if !defined(DEBUG)
-      RELEASE_ASSERT(FLAG_enable_isolate_groups || !USING_PRODUCT);
+      RELEASE_ASSERT(IsolateGroup::AreIsolateGroupsEnabled() || !USING_PRODUCT);
 #endif
       data = object_store->symbol_table();
       CanonicalStringSet table(&key, &value, &data);

tests/ffi/snapshot_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 //
 // Checks that the VM throws an appropriate exception when FFI objects are

tests/ffi/vmspecific_function_callbacks_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-testing-pragmas --enable-isolate-groups
+// VMOptions=--enable-testing-pragmas --enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--enable-testing-pragmas --no-enable-isolate-groups
 //
 // Dart test program for testing dart:ffi function pointers with callbacks.

tests/ffi_2/snapshot_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 //
 // Checks that the VM throws an appropriate exception when FFI objects are

tests/ffi_2/vmspecific_function_callbacks_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-testing-pragmas --enable-isolate-groups
+// VMOptions=--enable-testing-pragmas --enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--enable-testing-pragmas --no-enable-isolate-groups
 //
 // Dart test program for testing dart:ffi function pointers with callbacks.

tests/language/regress/regress23244_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Regression test case for http://dartbug.com/23244

tests/language/vm/optimized_guarded_field_isolates_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 // VMOptions=--optimization_counter_threshold=100 --no-background_compilation
 

tests/language_2/regress/regress23244_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Regression test case for http://dartbug.com/23244

tests/language_2/vm/optimized_guarded_field_isolates_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 // VMOptions=--optimization_counter_threshold=100 --no-background_compilation
 

tests/lib/isolate/bool_from_environment_default_value_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/capability_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/compile_time_error_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing that errors thrown from isolates are

tests/lib/isolate/count_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library CountTest;

tests/lib/isolate/cross_isolate_message_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing that isolates can communicate to isolates

tests/lib/isolate/deferred_in_isolate2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library deferred_in_isolate2_test;

tests/lib/isolate/deferred_in_isolate_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Test that deferred libraries are supported from isolates other than the root

tests/lib/isolate/enum_const_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/error_at_spawn_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library error_at_spawn;

tests/lib/isolate/error_at_spawnuri_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library error_at_spawnuri;

tests/lib/isolate/error_exit_at_spawn_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library error_exit_at_spawn;

tests/lib/isolate/error_exit_at_spawnuri_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library error_exit_at_spawnuri;

tests/lib/isolate/exit_at_spawn_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library exit_at_spawn;

tests/lib/isolate/exit_at_spawnuri_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library exit_at_spawn;

tests/lib/isolate/function_send1_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/function_send_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/handle_error2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library handle_error_test;

tests/lib/isolate/handle_error3_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library handle_error_test;

tests/lib/isolate/handle_error_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library handle_error_test;

tests/lib/isolate/illegal_msg_function_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library illegal_msg_function_test;

tests/lib/isolate/illegal_msg_mirror_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library illegal_msg_mirror_test;

tests/lib/isolate/int32_length_overflow_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:async";

tests/lib/isolate/int_from_environment_default_value_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/isolate_complex_messages_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing isolate communication with

tests/lib/isolate/isolate_current_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library isolate_current_test;

tests/lib/isolate/isolate_import_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library IsolateImportNegativeTest;

tests/lib/isolate/issue_21398_parent_isolate1_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

tests/lib/isolate/issue_21398_parent_isolate2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

tests/lib/isolate/issue_21398_parent_isolate_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:isolate';

tests/lib/isolate/issue_22778_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/issue_24243_parent_isolate_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import 'dart:collection';

tests/lib/isolate/issue_35626_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Tests that sets of enums can be set through ports.

tests/lib/isolate/issue_6610_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Testing that Isolate.spawn copies the source code of the parent isolate,

tests/lib/isolate/kill2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/kill_self_synchronously_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/kill_self_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/kill_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:isolate";

tests/lib/isolate/large_byte_data_leak_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:async";

tests/lib/isolate/large_byte_data_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 import "dart:async";

tests/lib/isolate/mandel_isolate_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 library MandelIsolateTest;

tests/lib/isolate/message2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing serialization of messages.

tests/lib/isolate/message3_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing serialization of messages.

tests/lib/isolate/message4_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // Dart test program for testing serialization of messages with static

tests/lib/isolate/message_const_type_arguments_1_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // https://github.com/dart-lang/sdk/issues/35778

tests/lib/isolate/message_const_type_arguments_2_test.dart

@@ -2,7 +2,7 @@
 // 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.
 
-// VMOptions=--enable-isolate-groups
+// VMOptions=--enable-isolate-groups --experimental-enable-isolate-groups-jit
 // VMOptions=--no-enable-isolate-groups
 
 // https://github.com/dart-lang/sdk/issues/35778