[tracing] Ignore tracing allocations in heap profiler

base/trace_event/trace_log.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/trace_event/trace_log.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 #include <utility>
@@ skipping 12 matching lines @@
 #include "base/strings/string_split.h"
 #include "base/strings/string_tokenizer.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_id_name_manager.h"
 #include "base/threading/worker_pool.h"
 #include "base/time/time.h"
+#include "base/trace_event/heap_profiler.h"
 #include "base/trace_event/heap_profiler_allocation_context_tracker.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_buffer.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_synthetic_delay.h"
 #include "base/trace_event/trace_sampling_thread.h"
 #include "build/build_config.h"
 
@@ skipping 341 matching lines @@
 TraceLog::~TraceLog() {}
 
 void TraceLog::InitializeThreadLocalEventBufferIfSupported() {
   // A ThreadLocalEventBuffer needs the message loop
   // - to know when the thread exits;
   // - to handle the final flush.
   // For a thread without a message loop or the message loop may be blocked, the
   // trace events will be added into the main buffer directly.
   if (thread_blocks_message_loop_.Get() || !MessageLoop::current())
     return;
+  HEAP_PROFILER_SCOPED_IGNORE;
   auto thread_local_event_buffer = thread_local_event_buffer_.Get();
   if (thread_local_event_buffer &&
       !CheckGeneration(thread_local_event_buffer->generation())) {
     delete thread_local_event_buffer;
     thread_local_event_buffer = NULL;
   }
   if (!thread_local_event_buffer) {
     thread_local_event_buffer = new ThreadLocalEventBuffer(this);
     thread_local_event_buffer_.Set(thread_local_event_buffer);
   }
@@ skipping 496 matching lines @@
 }
 
 // Usually it runs on a different thread.
 void TraceLog::ConvertTraceEventsToTraceFormat(
     std::unique_ptr<TraceBuffer> logged_events,
     const OutputCallback& flush_output_callback,
     const ArgumentFilterPredicate& argument_filter_predicate) {
   if (flush_output_callback.is_null())
     return;
 
+  HEAP_PROFILER_SCOPED_IGNORE;
   // The callback need to be called at least once even if there is no events
   // to let the caller know the completion of flush.
   scoped_refptr<RefCountedString> json_events_str_ptr = new RefCountedString();
   while (const TraceBufferChunk* chunk = logged_events->NextChunk()) {
     for (size_t j = 0; j < chunk->size(); ++j) {
       size_t size = json_events_str_ptr->size();
       if (size > kTraceEventBufferSizeInBytes) {
         flush_output_callback.Run(json_events_str_ptr, true);
         json_events_str_ptr = new RefCountedString();
       } else if (size) {
@@ skipping 414 matching lines @@
 
 void TraceLog::AddMetadataEvent(
     const unsigned char* category_group_enabled,
     const char* name,
     int num_args,
     const char** arg_names,
     const unsigned char* arg_types,
     const unsigned long long* arg_values,
     std::unique_ptr<ConvertableToTraceFormat>* convertable_values,
     unsigned int flags) {
+  HEAP_PROFILER_SCOPED_IGNORE;
   std::unique_ptr<TraceEvent> trace_event(new TraceEvent);
   int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
   ThreadTicks thread_now = ThreadNow();
   TimeTicks now = OffsetNow();
   AutoLock lock(lock_);
   trace_event->Initialize(
       thread_id, now, thread_now, TRACE_EVENT_PHASE_METADATA,
       category_group_enabled, name,
       trace_event_internal::kGlobalScope,  // scope
       trace_event_internal::kNoId,         // id
       trace_event_internal::kNoId,         // bind_id
       num_args, arg_names, arg_types, arg_values, convertable_values, flags);
   metadata_events_.push_back(std::move(trace_event));
 }
 
 // May be called when a COMPELETE event ends and the unfinished event has been
 // recycled (phase == TRACE_EVENT_PHASE_END and trace_event == NULL).
 std::string TraceLog::EventToConsoleMessage(unsigned char phase,
                                             const TimeTicks& timestamp,
                                             TraceEvent* trace_event) {
+  HEAP_PROFILER_SCOPED_IGNORE;
   AutoLock thread_info_lock(thread_info_lock_);
 
   // The caller should translate TRACE_EVENT_PHASE_COMPLETE to
   // TRACE_EVENT_PHASE_BEGIN or TRACE_EVENT_END.
   DCHECK(phase != TRACE_EVENT_PHASE_COMPLETE);
 
   TimeDelta duration;
   int thread_id =
       trace_event ? trace_event->thread_id() : PlatformThread::CurrentId();
   if (phase == TRACE_EVENT_PHASE_END) {
@@ skipping 283 matching lines @@
 
 void TraceLog::SetCurrentThreadBlocksMessageLoop() {
   thread_blocks_message_loop_.Set(true);
   if (thread_local_event_buffer_.Get()) {
     // This will flush the thread local buffer.
     delete thread_local_event_buffer_.Get();
   }
 }
 
 TraceBuffer* TraceLog::CreateTraceBuffer() {
+  HEAP_PROFILER_SCOPED_IGNORE;
   InternalTraceOptions options = trace_options();
   if (options & kInternalRecordContinuously)
     return TraceBuffer::CreateTraceBufferRingBuffer(
         kTraceEventRingBufferChunks);
   else if (options & kInternalEchoToConsole)
     return TraceBuffer::CreateTraceBufferRingBuffer(
         kEchoToConsoleTraceEventBufferChunks);
   else if (options & kInternalRecordAsMuchAsPossible)
     return TraceBuffer::CreateTraceBufferVectorOfSize(
         kTraceEventVectorBigBufferChunks);
@@ skipping 59 matching lines @@
 }
 
 ScopedTraceBinaryEfficient::~ScopedTraceBinaryEfficient() {
   if (*category_group_enabled_) {
     TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(category_group_enabled_, name_,
                                                 event_handle_);
   }
 }
 
 }  // namespace trace_event_internal