- Use a map to lookup libraries by URL.

runtime/vm/precompiler.cc

 // Copyright (c) 2015, 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/precompiler.h"
 
 #include "vm/aot_optimizer.h"
 #include "vm/assembler.h"
 #include "vm/ast_printer.h"
 #include "vm/branch_optimizer.h"
@@ skipping 336 matching lines @@
   Field& field = Field::Handle(Z);
   String& library_uri = String::Handle(Z);
   String& class_name = String::Handle(Z);
   String& function_name = String::Handle(Z);
 
   for (intptr_t i = 0; entry_points[i].library_uri != NULL; i++) {
     library_uri = Symbols::New(thread(), entry_points[i].library_uri);
     class_name = Symbols::New(thread(), entry_points[i].class_name);
     function_name = Symbols::New(thread(), entry_points[i].function_name);
 
-    lib = Library::LookupLibrary(library_uri);
+    lib = Library::LookupLibrary(T, library_uri);
     if (lib.IsNull()) {
       String& msg = String::Handle(Z, String::NewFormatted(
           "Cannot find entry point %s\n", entry_points[i].library_uri));
       Jump(Error::Handle(Z, ApiError::New(msg)));
       UNREACHABLE();
     }
 
     if (class_name.raw() == Symbols::TopLevel().raw()) {
       if (Library::IsPrivate(function_name)) {
         function_name = lib.PrivateName(function_name);
@@ skipping 1263 matching lines @@
     lib = cls.library();
     name = cls.DictionaryName();
     lib.RemoveObject(cls, name);
   }
 }
 
 
 void Precompiler::DropLibraries() {
   const GrowableObjectArray& retained_libraries =
       GrowableObjectArray::Handle(Z, GrowableObjectArray::New());
-  Library& root_lib = Library::Handle(Z, I->object_store()->root_library());
+  const Library& root_lib = Library::Handle(Z,
+      I->object_store()->root_library());
   Library& lib = Library::Handle(Z);
 
   for (intptr_t i = 0; i < libraries_.Length(); i++) {
     lib ^= libraries_.At(i);
     lib.DropDependencies();
     intptr_t entries = 0;
     DictionaryIterator it(lib);
     while (it.HasNext()) {
       it.GetNext();
       entries++;
     }
     // The root library might have no surviving members if it only exports main
     // from another library. It will still be referenced from the object store,
     // so retain it.
     bool retain = (entries > 0) ||
                   lib.is_dart_scheme() ||
                   (lib.raw() == root_lib.raw());
     if (retain) {
       lib.set_index(retained_libraries.Length());
       retained_libraries.Add(lib);
     } else {
       dropped_library_count_++;
       lib.set_index(-1);
       if (FLAG_trace_precompiler) {
         THR_Print("Dropping library %s\n", lib.ToCString());
       }
     }
   }
 
-  I->object_store()->set_libraries(retained_libraries);
+  Library::RegisterLibraries(T, retained_libraries);
   libraries_ = retained_libraries.raw();
 }
 
 
 void Precompiler::BindStaticCalls() {
   class BindStaticCallsVisitor : public FunctionVisitor {
    public:
     explicit BindStaticCallsVisitor(Zone* zone) :
         code_(Code::Handle(zone)),
         table_(Array::Handle(zone)),
@@ skipping 1068 matching lines @@
       CompilationPipeline::New(thread->zone(), function);
 
   ASSERT(FLAG_precompiled_mode);
   const bool optimized = function.IsOptimizable();  // False for natives.
   return PrecompileFunctionHelper(pipeline, function, optimized);
 }
 
 #endif  // DART_PRECOMPILER
 
 }  // namespace dart