Create frequently used symbols in the vm isolate

vm/isolate.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/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "lib/mirrors.h"
 #include "vm/compiler_stats.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/debuginfo.h"
 #include "vm/heap.h"
 #include "vm/message_handler.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/port.h"
 #include "vm/random.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
+#include "vm/symbols.h"
 #include "vm/thread.h"
 #include "vm/timer.h"
 #include "vm/visitor.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, report_usage_count, false,
             "Track function usage and report.");
 DEFINE_FLAG(bool, trace_isolates, false,
             "Trace isolate creation and shut down.");
@@ skipping 123 matching lines @@
       debugger_(NULL),
       long_jump_base_(NULL),
       timer_list_(),
       ast_node_id_(AstNode::kNoId),
       computation_id_(AstNode::kNoId),
       ic_data_array_(Array::null()),
       mutex_(new Mutex()),
       stack_limit_(0),
       saved_stack_limit_(0),
       message_handler_(NULL),
-      spawn_data_(NULL) {
+      spawn_data_(NULL),
+      gc_prologue_callbacks_(),
+      gc_epilogue_callbacks_(),
+      symbols_(NULL) {
 }
 
 
 Isolate::~Isolate() {
   delete [] name_;
   delete heap_;
   delete object_store_;
   delete api_state_;
   delete stub_code_;
   delete debugger_;
   delete mutex_;
   mutex_ = NULL;  // Fail fast if interrupts are scheduled on a dead isolate.
   delete message_handler_;
   message_handler_ = NULL;  // Fail fast if we send messages to a dead isolate.
+  delete symbols_;
 }
 
 void Isolate::SetCurrent(Isolate* current) {
   Thread::SetThreadLocal(isolate_key, reinterpret_cast<uword>(current));
 }
 
 
 // The single thread local key which stores all the thread local data
 // for a thread. Since an Isolate is the central repository for
 // storing all isolate specific information a single thread local key
@@ skipping 213 matching lines @@
 
 
 void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor,
                                   bool visit_prologue_weak_handles,
                                   bool validate_frames) {
   ASSERT(visitor != NULL);
 
   // Visit objects in the object store.
   object_store()->VisitObjectPointers(visitor);
 
+  // Visit cached symbols if any.
+  if (symbols() != NULL) {
+    symbols()->VisitObjectPointers(visitor);
+  }
+
   // Visit objects in the class table.
   class_table()->VisitObjectPointers(visitor);
 
   // Visit objects in per isolate stubs.
   StubCode::VisitObjectPointers(visitor);
 
   // Visit objects in zones.
   current_zone()->VisitObjectPointers(visitor);
 
   // Iterate over all the stack frames and visit objects on the stack.
@@ skipping 21 matching lines @@
 
 
 void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor,
                                          bool visit_prologue_weak_handles) {
   if (api_state() != NULL) {
     api_state()->VisitWeakHandles(visitor, visit_prologue_weak_handles);
   }
 }
 
 }  // namespace dart