- Use a map to lookup libraries by URL.

runtime/vm/bootstrap.cc

 // Copyright (c) 2012, 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 "vm/bootstrap.h"
 
 #include "include/dart_api.h"
 
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
@@ skipping 283 matching lines @@
   // Create library objects for all the bootstrap libraries.
   for (intptr_t i = 0;
        bootstrap_libraries[i].index_ != ObjectStore::kNone;
        ++i) {
 #ifdef PRODUCT
     if (bootstrap_libraries[i].index_ == ObjectStore::kMirrors) {
       continue;
     }
 #endif  // !PRODUCT
     uri = Symbols::New(thread, bootstrap_libraries[i].uri_);
-    lib = Library::LookupLibrary(uri);
+    lib = Library::LookupLibrary(thread, uri);
     if (lib.IsNull()) {
       lib = Library::NewLibraryHelper(uri, false);
       lib.SetLoadRequested();
-      lib.Register();
+      lib.Register(thread);
     }
     isolate->object_store()->set_bootstrap_library(
         bootstrap_libraries[i].index_, lib);
   }
 
   // Load, compile and patch bootstrap libraries.
   for (intptr_t i = 0;
        bootstrap_libraries[i].index_ != ObjectStore::kNone;
        ++i) {
 #ifdef PRODUCT
     if (bootstrap_libraries[i].index_ == ObjectStore::kMirrors) {
       continue;
     }
 #endif  // PRODUCT
     uri = Symbols::New(thread, bootstrap_libraries[i].uri_);
-    lib = Library::LookupLibrary(uri);
+    lib = Library::LookupLibrary(thread, uri);
     ASSERT(!lib.IsNull());
     source = GetLibrarySource(lib, uri, false);
     if (source.IsNull()) {
       const String& message = String::Handle(
           String::NewFormatted("Unable to find dart source for %s",
                                uri.ToCString()));
       error ^= ApiError::New(message);
       break;
     }
     script = Script::New(uri, source, RawScript::kLibraryTag);
@@ skipping 28 matching lines @@
     Compiler::CompileClass(cls);
   }
 
   // Restore the library tag handler for the isolate.
   isolate->set_library_tag_handler(saved_tag_handler);
 
   return error.raw();
 }
 
 }  // namespace dart