Dump number of symbols in the isolate symbol table before shutting down an isolate under the --trac…

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 351 matching lines @@
   // Dump all accumalated timer data for the isolate.
   timer_list_.ReportTimers();
   if (FLAG_report_usage_count) {
     PrintInvokedFunctions();
   }
   CompilerStats::Print();
   if (FLAG_generate_gdb_symbols) {
     DebugInfo::UnregisterAllSections();
   }
   if (FLAG_trace_isolates) {
+    Zone zone(this);
+    HandleScope handle_scope(this);
+    OS::Print("Number of symbols added = %d\n", Symbols::UsedCount(this));
     OS::Print("[-] Stopping isolate:\n"
               "\tisolate:    %s\n", name());
   }
   // TODO(5411455): For now just make sure there are no current isolates
   // as we are shutting down the isolate.
   SetCurrent(NULL);
 }
 
 
 Dart_IsolateCreateCallback Isolate::create_callback_ = NULL;
@@ skipping 43 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