Updated MallocHooks to collect stack traces when memory is allocated.

runtime/vm/profiler_service.cc

Index: runtime/vm/profiler_service.cc
diff --git a/runtime/vm/profiler_service.cc b/runtime/vm/profiler_service.cc
index 6731e2d91d8f167723070a34cc0871c441943999..495e8aed018cb15a2a3cf8c8bcfbf4c81a0eae97 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -2670,11 +2670,11 @@ void ProfilerService::PrintJSONImpl(Thread* thread,
 
 class NoAllocationSampleFilter : public SampleFilter {
  public:
-  NoAllocationSampleFilter(Isolate* isolate,
+  NoAllocationSampleFilter(Dart_Port port,
                            intptr_t thread_task_mask,
                            int64_t time_origin_micros,
                            int64_t time_extent_micros)
-      : SampleFilter(isolate,
+      : SampleFilter(port,
                      thread_task_mask,
                      time_origin_micros,
                      time_extent_micros) {}
@@ -2690,7 +2690,7 @@ void ProfilerService::PrintJSON(JSONStream* stream,
                                 int64_t time_extent_micros) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
-  NoAllocationSampleFilter filter(isolate, Thread::kMutatorTask,
+  NoAllocationSampleFilter filter(isolate->main_port(), Thread::kMutatorTask,
                                   time_origin_micros, time_extent_micros);
   const bool as_timeline = false;
   PrintJSONImpl(thread, stream, tag_order, extra_tags, &filter, as_timeline);
@@ -2699,12 +2699,12 @@ void ProfilerService::PrintJSON(JSONStream* stream,
 
 class ClassAllocationSampleFilter : public SampleFilter {
  public:
-  ClassAllocationSampleFilter(Isolate* isolate,
+  ClassAllocationSampleFilter(Dart_Port port,
                               const Class& cls,
                               intptr_t thread_task_mask,
                               int64_t time_origin_micros,
                               int64_t time_extent_micros)
-      : SampleFilter(isolate,
+      : SampleFilter(port,
                      thread_task_mask,
                      time_origin_micros,
                      time_extent_micros),
@@ -2729,8 +2729,9 @@ void ProfilerService::PrintAllocationJSON(JSONStream* stream,
                                           int64_t time_extent_micros) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
-  ClassAllocationSampleFilter filter(isolate, cls, Thread::kMutatorTask,
-                                     time_origin_micros, time_extent_micros);
+  ClassAllocationSampleFilter filter(isolate->main_port(), cls,
+                                     Thread::kMutatorTask, time_origin_micros,
+                                     time_extent_micros);
   const bool as_timeline = false;
   PrintJSONImpl(thread, stream, tag_order, kNoExtraTags, &filter, as_timeline);
 }
@@ -2745,8 +2746,8 @@ void ProfilerService::PrintTimelineJSON(JSONStream* stream,
   const intptr_t thread_task_mask = Thread::kMutatorTask |
                                     Thread::kCompilerTask |
                                     Thread::kSweeperTask | Thread::kMarkerTask;
-  NoAllocationSampleFilter filter(isolate, thread_task_mask, time_origin_micros,
-                                  time_extent_micros);
+  NoAllocationSampleFilter filter(isolate->main_port(), thread_task_mask,
+                                  time_origin_micros, time_extent_micros);
   const bool as_timeline = true;
   PrintJSONImpl(thread, stream, tag_order, kNoExtraTags, &filter, as_timeline);
 }