Collect samples for background threads.

runtime/vm/profiler_service.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/profiler_service.h"
 
 #include "vm/growable_array.h"
 #include "vm/log.h"
 #include "vm/native_symbol.h"
 #include "vm/object.h"
@@ skipping 2479 matching lines @@
     } else {
       profile.PrintProfileJSON(stream);
     }
   }
 }
 
 
 class NoAllocationSampleFilter : public SampleFilter {
  public:
   NoAllocationSampleFilter(Isolate* isolate,
+                           bool include_background_samples,
                            int64_t time_origin_micros,
                            int64_t time_extent_micros)
       : SampleFilter(isolate,
                      time_origin_micros,
-                     time_extent_micros) {
+                     time_extent_micros),
+        include_background_samples_(include_background_samples) {
   }
 
   bool FilterSample(Sample* sample) {
-    return !sample->is_allocation_sample();
+    if (sample->is_allocation_sample()) {
+      return false;
+    }
+    return sample->is_mutator_thread() || include_background_samples_;
   }
+
+ private:
+  const bool include_background_samples_;
 };
 
 
 void ProfilerService::PrintJSON(JSONStream* stream,
                                 Profile::TagOrder tag_order,
                                 intptr_t extra_tags,
                                 int64_t time_origin_micros,
                                 int64_t time_extent_micros) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
+  const bool include_background_samples = false;
   NoAllocationSampleFilter filter(isolate,
+                                  include_background_samples,
                                   time_origin_micros,
                                   time_extent_micros);
   const bool as_timeline = false;
   PrintJSONImpl(thread, stream, tag_order, extra_tags, &filter, as_timeline);
 }
 
 
 class ClassAllocationSampleFilter : public SampleFilter {
  public:
   ClassAllocationSampleFilter(Isolate* isolate,
@@ skipping 32 matching lines @@
   PrintJSONImpl(thread, stream, tag_order, kNoExtraTags, &filter, as_timeline);
 }
 
 
 void ProfilerService::PrintTimelineJSON(JSONStream* stream,
                                         Profile::TagOrder tag_order,
                                         int64_t time_origin_micros,
                                         int64_t time_extent_micros) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
+  const bool include_background_samples = true;
   NoAllocationSampleFilter filter(isolate,
+                                  include_background_samples,
                                   time_origin_micros,
                                   time_extent_micros);
   const bool as_timeline = true;
   PrintJSONImpl(thread, stream, tag_order, kNoExtraTags, &filter, as_timeline);
 }
 
 
 void ProfilerService::ClearSamples() {
   SampleBuffer* sample_buffer = Profiler::sample_buffer();
   if (sample_buffer == NULL) {
     return;
   }
 
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
 
   // Disable thread interrupts while processing the buffer.
   DisableThreadInterruptsScope dtis(thread);
 
   ClearProfileVisitor clear_profile(isolate);
   sample_buffer->VisitSamples(&clear_profile);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart