[tracing] Ignore tracing allocations in heap profiler

base/trace_event/malloc_dump_provider.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/malloc_dump_provider.h"
 
 #include <stddef.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/allocator/allocator_shim.h"
@@ skipping 67 matching lines @@
     &HookZeroInitAlloc, /* alloc_zero_initialized_function */
     &HookllocAligned,   /* alloc_aligned_function */
     &HookRealloc,       /* realloc_function */
     &HookFree,          /* free_function */
     nullptr,            /* next */
 };
 
 }  // namespace
 #endif  // BUILDFLAG(USE_EXPERIMENTAL_ALLOCATOR_SHIM)
 
+MallocDumpProvider::ScopedHeapProfilerIgnoreMalloc::
+    ScopedHeapProfilerIgnoreMalloc() {
+  if (UNLIKELY(AllocationContextTracker::capture_enabled())) {
+    AllocationContextTracker::GetInstanceForCurrentThread()
+        ->start_ignore_scope();
+  }
+}
+
+MallocDumpProvider::ScopedHeapProfilerIgnoreMalloc::
+    ~ScopedHeapProfilerIgnoreMalloc() {
+  if (UNLIKELY(AllocationContextTracker::capture_enabled())) {
+    AllocationContextTracker::GetInstanceForCurrentThread()->end_ignore_scope();
+  }
+}
+
 // static
 const char MallocDumpProvider::kAllocatedObjects[] = "malloc/allocated_objects";
 
 // static
 MallocDumpProvider* MallocDumpProvider::GetInstance() {
   return Singleton<MallocDumpProvider,
                    LeakySingletonTraits<MallocDumpProvider>>::get();
 }
 
 MallocDumpProvider::MallocDumpProvider()
@@ skipping 154 matching lines @@
       tid_dumping_heap_ == PlatformThread::CurrentId())
     return;
   AutoLock lock(allocation_register_lock_);
   if (!allocation_register_)
     return;
   allocation_register_->Remove(address);
 }
 
 }  // namespace trace_event
 }  // namespace base