Revert "DWARF and unwind support for AOT assembly output."

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "lib/stacktrace.h"
@@ skipping 6668 matching lines @@
                                             "WriteAppAOTSnapshot"));
   AssemblyImageWriter image_writer(assembly_buffer, ApiReallocate,
                                    2 * MB /* initial_size */);
   uint8_t* vm_snapshot_data_buffer = NULL;
   uint8_t* isolate_snapshot_data_buffer = NULL;
   FullSnapshotWriter writer(Snapshot::kAppAOT, &vm_snapshot_data_buffer,
                             &isolate_snapshot_data_buffer, ApiReallocate,
                             &image_writer, &image_writer);
 
   writer.WriteFullSnapshot();
-  image_writer.Finalize();
   *assembly_size = image_writer.AssemblySize();
 
   return Api::Success();
 #endif
 }
 
 
 DART_EXPORT Dart_Handle
 Dart_CreateAppAOTSnapshotAsBlobs(uint8_t** vm_snapshot_data_buffer,
                                  intptr_t* vm_snapshot_data_size,
                                  uint8_t** vm_snapshot_instructions_buffer,
                                  intptr_t* vm_snapshot_instructions_size,
                                  uint8_t** isolate_snapshot_data_buffer,
                                  intptr_t* isolate_snapshot_data_size,
                                  uint8_t** isolate_snapshot_instructions_buffer,
                                  intptr_t* isolate_snapshot_instructions_size) {
 #if defined(TARGET_ARCH_IA32)
   return Api::NewError("AOT compilation is not supported on IA32.");
 #elif defined(TARGET_ARCH_DBC)
   return Api::NewError("AOT compilation is not supported on DBC.");
 #elif !defined(DART_PRECOMPILER)
   return Api::NewError(
       "This VM was built without support for AOT compilation.");
 #else
-  if (FLAG_dwarf_stack_traces) {
-    return Api::NewError(
-        "--dwarf_stack_traces requires creating an AOT snapshot as assembly.");
-  }
-
   API_TIMELINE_DURATION;
   DARTSCOPE(Thread::Current());
   Isolate* I = T->isolate();
   if (I->compilation_allowed()) {
     return Api::NewError(
         "Isolate is not precompiled. "
         "Did you forget to call Dart_Precompile?");
   }
   ASSERT(FLAG_load_deferred_eagerly);
   if (vm_snapshot_data_buffer == NULL) {
@@ skipping 112 matching lines @@
 }
 
 
 DART_EXPORT void Dart_DumpNativeStackTrace(void* context) {
 #ifndef PRODUCT
   Profiler::DumpStackTrace(context);
 #endif
 }
 
 }  // namespace dart