forked from mirrors/gecko-dev
f14c01769a
This prevents potential name clashes between the two profilers. Differential Revision: https://phabricator.services.mozilla.com/D31930 --HG-- extra : moz-landing-system : lando
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: set ts=8 sts=2 et sw=2 tw=80:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "BaseProfiler.h"
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#ifdef MOZ_BASE_PROFILER
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# include "BaseProfilingStack.h"
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# include "mozilla/IntegerRange.h"
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# include "mozilla/UniquePtr.h"
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# include "mozilla/UniquePtrExtensions.h"
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# include <algorithm>
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namespace mozilla {
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namespace baseprofiler {
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ProfilingStack::~ProfilingStack() {
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// The label macros keep a reference to the ProfilingStack to avoid a TLS
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// access. If these are somehow not all cleared we will get a
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// use-after-free so better to crash now.
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MOZ_RELEASE_ASSERT(stackPointer == 0);
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delete[] frames;
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}
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void ProfilingStack::ensureCapacitySlow() {
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MOZ_ASSERT(stackPointer >= capacity);
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const uint32_t kInitialCapacity = 128;
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uint32_t sp = stackPointer;
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auto newCapacity =
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std::max(sp + 1, capacity ? capacity * 2 : kInitialCapacity);
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auto* newFrames = new ProfilingStackFrame[newCapacity];
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// It's important that `frames` / `capacity` / `stackPointer` remain
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// consistent here at all times.
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for (auto i : IntegerRange(capacity)) {
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newFrames[i] = frames[i];
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}
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ProfilingStackFrame* oldFrames = frames;
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frames = newFrames;
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capacity = newCapacity;
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delete[] oldFrames;
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}
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} // namespace baseprofiler
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} // namespace mozilla
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#endif // MOZ_BASE_PROFILER
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