Added methods to surface number of zone and scoped handles for each isolate.

runtime/vm/thread.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/thread.h"
 
 #include "vm/compiler_stats.h"
 #include "vm/dart_api_state.h"
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
@@ skipping 735 matching lines @@
   while (scope != NULL) {
     if (scope->local_handles()->IsValidHandle(object)) {
       return true;
     }
     scope = scope->previous();
   }
   return false;
 }
 
 
-int Thread::CountLocalHandles() const {
-  int total = 0;
+intptr_t Thread::CountLocalHandles() const {
+  intptr_t total = 0;
   ApiLocalScope* scope = api_top_scope_;
   while (scope != NULL) {
     total += scope->local_handles()->CountHandles();
     scope = scope->previous();
   }
   return total;
 }
 
 
+intptr_t Thread::CountZoneHandles() const {
+  intptr_t count = 0;
+  Zone* zone = zone_;
+  while (zone != NULL) {
+    count += zone->handles()->CountZoneHandles();
+    zone = zone->previous();
+  }

[siva, 2017/01/03 20:08:31]

ASSERT(count > 0);

+  return count;
+}
+
+
+intptr_t Thread::CountScopedHandles() const {
+  intptr_t count = 0;
+  Zone* zone = zone_;
+  while (zone != NULL) {
+    count += zone->handles()->CountScopedHandles();
+    zone = zone->previous();
+  }

[siva, 2017/01/03 20:08:31]

ASSERT(count > 0);

+  return count;
+}
+
+
 int Thread::ZoneSizeInBytes() const {
   int total = 0;
   ApiLocalScope* scope = api_top_scope_;
   while (scope != NULL) {
     total += scope->zone()->SizeInBytes();
     scope = scope->previous();
   }
   return total;
 }
 
@@ skipping 38 matching lines @@
 
 DisableThreadInterruptsScope::~DisableThreadInterruptsScope() {
   if (thread() != NULL) {
     OSThread* os_thread = thread()->os_thread();
     ASSERT(os_thread != NULL);
     os_thread->EnableThreadInterrupts();
   }
 }
 
 }  // namespace dart