[vm] Add Dart_CreateVMAOTSnapshotAsAssembly.

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 "lib/stacktrace.h"
 #include "platform/assert.h"
@@ skipping 6547 matching lines @@
 
   writer.WriteFullSnapshot();
   image_writer.Finalize();
   *assembly_size = image_writer.AssemblySize();
 
   return Api::Success();
 #endif
 }
 
 DART_EXPORT Dart_Handle
+Dart_CreateVMAOTSnapshotAsAssembly(uint8_t** assembly_buffer,
+                                   intptr_t* assembly_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
+  API_TIMELINE_DURATION;
+  DARTSCOPE(Thread::Current());
+  CHECK_NULL(assembly_buffer);
+  CHECK_NULL(assembly_size);
+
+  NOT_IN_PRODUCT(TimelineDurationScope tds2(T, Timeline::GetIsolateStream(),
+                                            "WriteVMAOTSnapshot"));
+  AssemblyImageWriter image_writer(assembly_buffer, ApiReallocate,
+                                   2 * MB /* initial_size */);
+  uint8_t* vm_snapshot_data_buffer = NULL;
+  FullSnapshotWriter writer(Snapshot::kFullAOT, &vm_snapshot_data_buffer, NULL,
+                            ApiReallocate, &image_writer, &image_writer);

[siva, 2017/08/01 22:55:38]

The second &image_write parameter can be NULL right, as we will not be wrting
the regular isolate snapshot?

[rmacnak, 2017/08/02 00:55:39]

Yes, done.

+
+  writer.WriteFullSnapshot();
+  *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.");
@@ skipping 168 matching lines @@
 #endif
 }
 
 DART_EXPORT void Dart_DumpNativeStackTrace(void* context) {
 #ifndef PRODUCT
   Profiler::DumpStackTrace(context);
 #endif
 }
 
 }  // namespace dart