Reload native extensions when starting from a snapshot.

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 5700 matching lines @@
     } else {
       library_prefix =
           LibraryPrefix::New(prefix_symbol, import_ns, false, library_vm);
       library_vm.AddObject(library_prefix, prefix_symbol);
     }
   }
   return Api::Success();
 }
 
 
+DART_EXPORT Dart_Handle Dart_GetImportsOfScheme(Dart_Handle scheme) {
+  DARTSCOPE(Thread::Current());
+  Isolate* I = T->isolate();
+  const String& scheme_vm = Api::UnwrapStringHandle(Z, scheme);
+  if (scheme_vm.IsNull()) {
+    RETURN_TYPE_ERROR(Z, scheme, String);
+  }
+
+  const GrowableObjectArray& libraries =
+      GrowableObjectArray::Handle(Z, I->object_store()->libraries());
+  const GrowableObjectArray& result =
+      GrowableObjectArray::Handle(Z, GrowableObjectArray::New());
+  Library& importer = Library::Handle(Z);
+  Array& imports = Array::Handle(Z);
+  Namespace& ns = Namespace::Handle(Z);
+  Library& importee = Library::Handle(Z);
+  String& importee_uri = String::Handle(Z);
+  for (intptr_t i = 0; i < libraries.Length(); i++) {
+    importer ^= libraries.At(i);
+    imports = importer.imports();
+    for (intptr_t j = 0; j < imports.Length(); j++) {
+      ns ^= imports.At(j);
+      if (ns.IsNull()) continue;
+      importee = ns.library();
+      importee_uri = importee.url();
+      if (importee_uri.StartsWith(scheme_vm)) {
+        result.Add(importer);
+        result.Add(importee);
+      }
+    }
+  }
+
+  return Api::NewHandle(T, Array::MakeArray(result));
+}
+
+
 DART_EXPORT Dart_Handle Dart_LoadSource(Dart_Handle library,
                                         Dart_Handle url,
                                         Dart_Handle resolved_url,
                                         Dart_Handle source,
                                         intptr_t line_offset,
                                         intptr_t column_offset) {
   API_TIMELINE_DURATION;
   DARTSCOPE(Thread::Current());
   Isolate* I = T->isolate();
   const Library& lib = Api::UnwrapLibraryHandle(Z, library);
@@ skipping 904 matching lines @@
 
 DART_EXPORT bool Dart_IsPrecompiledRuntime() {
 #if defined(DART_PRECOMPILED_RUNTIME)
   return true;
 #else
   return false;
 #endif
 }
 
 }  // namespace dart