VM support for running Kernel binaries.

runtime/bin/loader.cc

 // Copyright (c) 2016, 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 "bin/loader.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/extensions.h"
@@ skipping 318 matching lines @@
                                                    extension_path,
                                                    library);
     if (Dart_IsError(result)) {
       loader->error_ = result;
       return false;
     }
     return true;
   }
 
   // Check for payload and load accordingly.
-  bool is_snapshot = false;
   const uint8_t* payload = result->payload;
   intptr_t payload_length = result->payload_length;
-  payload =
-      DartUtils::SniffForMagicNumber(payload,
-                                     &payload_length,
-                                     &is_snapshot);
+  const DartUtils::MagicNumber payload_type =
+      DartUtils::SniffForMagicNumber(&payload, &payload_length);
   Dart_Handle source = Dart_Null();
-  if (!is_snapshot) {
+  if (payload_type == DartUtils::kUnknownMagicNumber) {
     source = Dart_NewStringFromUTF8(result->payload,
                                     result->payload_length);
     if (Dart_IsError(source)) {
       loader->error_ = DartUtils::NewError(
           "%s is not a valid UTF-8 script",
           reinterpret_cast<char*>(result->uri));
       return false;
     }
   }
   intptr_t tag = result->tag;
@@ skipping 12 matching lines @@
       dart_result = Dart_LoadLibrary(uri, resolved_uri, source, 0, 0);
     break;
     case Dart_kSourceTag: {
       ASSERT(library_uri != Dart_Null());
       Dart_Handle library = Dart_LookupLibrary(library_uri);
       ASSERT(!Dart_IsError(library));
       dart_result = Dart_LoadSource(library, uri, resolved_uri, source, 0, 0);
     }
     break;
     case Dart_kScriptTag:
-      if (is_snapshot) {
+      if (payload_type == DartUtils::kSnapshotMagicNumber) {
         dart_result = Dart_LoadScriptFromSnapshot(payload, payload_length);
+      } else if (payload_type == DartUtils::kKernelMagicNumber) {
+        dart_result = Dart_LoadKernel(payload, payload_length);
       } else {
         dart_result = Dart_LoadScript(uri, resolved_uri, source, 0, 0);
       }
     break;
     default:
       UNREACHABLE();
   }
 
   // Re-acquire the lock before exiting the function (it was held before entry),
   loader->monitor_->Enter();
@@ skipping 364 matching lines @@
   MutexLocker ml(loader_infos_lock_);
   Loader* loader = LoaderForLocked(dest_port_id);
   if (loader == NULL) {
     return;
   }
   loader->QueueMessage(message);
 }
 
 }  // namespace bin
 }  // namespace dart