blob: 67125ff2909d94447f2adb2432705426d38f5c12 [file] [log] [blame]
// Copyright 2016 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/heap_profiler_event_filter.h"
#include "base/trace_event/category_registry.h"
#include "base/trace_event/heap_profiler_allocation_context_tracker.h"
#include "base/trace_event/trace_category.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_event_impl.h"
namespace base {
namespace trace_event {
namespace {
inline bool IsPseudoStackEnabled() {
// Only PSEUDO_STACK and MIXED_STACK modes require trace events.
return AllocationContextTracker::capture_mode() ==
AllocationContextTracker::CaptureMode::PSEUDO_STACK ||
AllocationContextTracker::capture_mode() ==
AllocationContextTracker::CaptureMode::MIXED_STACK;
}
inline AllocationContextTracker* GetThreadLocalTracker() {
return AllocationContextTracker::GetInstanceForCurrentThread();
}
} // namespace
// static
const char HeapProfilerEventFilter::kName[] = "heap_profiler_predicate";
HeapProfilerEventFilter::HeapProfilerEventFilter() {}
HeapProfilerEventFilter::~HeapProfilerEventFilter() {}
bool HeapProfilerEventFilter::FilterTraceEvent(
const TraceEvent& trace_event) const {
if (!IsPseudoStackEnabled())
return true;
// TODO(primiano): Add support for events with copied name crbug.com/581079.
if (trace_event.flags() & TRACE_EVENT_FLAG_COPY)
return true;
const auto* category = CategoryRegistry::GetCategoryByStatePtr(
trace_event.category_group_enabled());
AllocationContextTracker::PseudoStackFrame frame = {category->name(),
trace_event.name()};
if (trace_event.phase() == TRACE_EVENT_PHASE_BEGIN ||
trace_event.phase() == TRACE_EVENT_PHASE_COMPLETE) {
GetThreadLocalTracker()->PushPseudoStackFrame(frame);
} else if (trace_event.phase() == TRACE_EVENT_PHASE_END) {
// The pop for |TRACE_EVENT_PHASE_COMPLETE| events is in |EndEvent|.
GetThreadLocalTracker()->PopPseudoStackFrame(frame);
}
// Do not filter-out any events and always return true. TraceLog adds the
// event only if it is enabled for recording.
return true;
}
void HeapProfilerEventFilter::EndEvent(const char* category_name,
const char* event_name) const {
if (IsPseudoStackEnabled())
GetThreadLocalTracker()->PopPseudoStackFrame({category_name, event_name});
}
} // namespace trace_event
} // namespace base