Fix issue 27006 (safepoint assertion failure).

runtime/lib/vmservice.cc

 // Copyright (c) 2015, 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 "vm/bootstrap_natives.h"
 #include "vm/dart_api_impl.h"
 #include "vm/datastream.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
@@ skipping 398 matching lines @@
   ASSERT(!Dart_IsError(err));
 
   TarArchive archive(reinterpret_cast<uint8_t*>(bytes), length);
   archive.Read();
 
   err = Dart_TypedDataReleaseData(data_handle);
   ASSERT(!Dart_IsError(err));
 
   intptr_t archive_size = archive.Length();
 
-  const Array& result_list = Array::Handle(thread->zone(),
-    Array::New(2 * archive_size));
+  Dart_Handle result_list = Dart_NewList(2 * archive_size);
+  ASSERT(!Dart_IsError(result_list));
 
   intptr_t idx = 0;
   while (archive.HasMore()) {
     char* filename = archive.NextFilename();
     uint8_t* contents = archive.NextContent();
     intptr_t contents_length = archive.NextContentLength();
 
     Dart_Handle dart_filename = Dart_NewExternalLatin1String(
         reinterpret_cast<uint8_t*>(filename),
         strlen(filename),
         filename,
         FilenameFinalizer);
     ASSERT(!Dart_IsError(dart_filename));
 
     Dart_Handle dart_contents = Dart_NewExternalTypedData(
         Dart_TypedData_kUint8, contents, contents_length);
     ASSERT(!Dart_IsError(dart_contents));
     Dart_NewWeakPersistentHandle(
         dart_contents, contents, contents_length, ContentsFinalizer);
 
-    result_list.SetAt(idx, Api::UnwrapStringHandle(
-        thread->zone(), dart_filename));
-    result_list.SetAt(idx + 1, Api::UnwrapExternalTypedDataHandle(
-        thread->zone(), dart_contents));
+    Dart_ListSetAt(result_list, idx, dart_filename);
+    Dart_ListSetAt(result_list, (idx + 1), dart_contents);
     idx += 2;
   }
-
-  return result_list.raw();
+  return Api::UnwrapArrayHandle(thread->zone(), result_list).raw();
 #else
   return Object::null();
 #endif
 }
 
 
 
 DEFINE_NATIVE_ENTRY(VMService_spawnUriNotify, 2) {
 #ifndef PRODUCT
   if (!FLAG_support_service) {
@@ skipping 25 matching lines @@
     ServiceEvent spawn_event(NULL, ServiceEvent::kIsolateSpawn);
     spawn_event.set_spawn_token(&token);
     spawn_event.set_spawn_error(&String::Cast(result));
     Service::HandleEvent(&spawn_event);
   }
 #endif  // PRODUCT
   return Object::null();
 }
 
 }  // namespace dart