VM: Support bootstrapping core libraries from Kernel binaries instead of source.

runtime/vm/dart.h

 // Copyright (c) 2011, 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.
 
 #ifndef RUNTIME_VM_DART_H_
 #define RUNTIME_VM_DART_H_
 
 #include "include/dart_api.h"
 #include "vm/allocation.h"
 #include "vm/snapshot.h"
@@ skipping 19 matching lines @@
                         Dart_FileOpenCallback file_open,
                         Dart_FileReadCallback file_read,
                         Dart_FileWriteCallback file_write,
                         Dart_FileCloseCallback file_close,
                         Dart_EntropySource entropy_source,
                         Dart_GetVMServiceAssetsArchive get_service_assets);
   static const char* Cleanup();
 
   static Isolate* CreateIsolate(const char* name_prefix,
                                 const Dart_IsolateFlags& api_flags);
-  static RawError* InitializeIsolate(const uint8_t* snapshot, void* data);
+
+  // Initialize an isolate, either from a snapshot, from a Kernel binary, or
+  // from SDK library sources.  If the snapshot_buffer is non-NULL,
+  // initialize from a snapshot or a Kernel binary depending on the value of
+  // from_kernel.  Otherwise, initialize from sources.
+  static RawError* InitializeIsolate(const uint8_t* snapshot_buffer,
+                                     intptr_t snapshot_length,
+                                     bool from_kernel,
+                                     void* data);
   static void RunShutdownCallback();
   static void ShutdownIsolate(Isolate* isolate);
   static void ShutdownIsolate();
 
   static Isolate* vm_isolate() { return vm_isolate_; }
   static ThreadPool* thread_pool() { return thread_pool_; }
 
   // Returns a timestamp for use in debugging output in milliseconds
   // since start time.
   static int64_t timestamp();
@@ skipping 75 matching lines @@
   static Dart_FileOpenCallback file_open_callback_;
   static Dart_FileReadCallback file_read_callback_;
   static Dart_FileWriteCallback file_write_callback_;
   static Dart_FileCloseCallback file_close_callback_;
   static Dart_EntropySource entropy_source_callback_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_DART_H_