memory_counter.cpp

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "memory_counter.h"

#include "mozilla/UniquePtr.h"

#include "mozmemory.h"

#include "GeckoProfiler.h"

namespace mozilla::profiler {

class MemoryCounter : public BaseProfilerCount {

 public:

  MemoryCounter()

      : BaseProfilerCount("malloc", "Memory", "Amount of allocated memory") {};

  // The counter is removed by ActivePS::Destroy()

  virtual ~MemoryCounter() = default;

  CountSample Sample() override {

    CountSample sample = {

        .count = 0,

        .number = 0,

        .isSampleNew = true,

};

    jemalloc_stats_lite_t mallocStats;

    jemalloc_stats_lite(&mallocStats);

    sample.count += int64_t(mallocStats.allocated_bytes);

    sample.number += mallocStats.num_operations;

    js::gc::ProfilerMemoryCounts jsStats = js::gc::GetProfilerMemoryCounts();

    sample.count += int64_t(jsStats.bytes);

    sample.number += jsStats.operations;

    return sample;

};

UniquePtr<BaseProfilerCount> create_memory_counter() {

  return MakeUnique<MemoryCounter>();

}  // namespace mozilla::profiler