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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /mozglue/baseprofiler/core/ProfilingStack.cpp | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mozglue/baseprofiler/core/ProfilingStack.cpp')
-rw-r--r-- | mozglue/baseprofiler/core/ProfilingStack.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/mozglue/baseprofiler/core/ProfilingStack.cpp b/mozglue/baseprofiler/core/ProfilingStack.cpp new file mode 100644 index 0000000000..f5cd2ddd04 --- /dev/null +++ b/mozglue/baseprofiler/core/ProfilingStack.cpp @@ -0,0 +1,52 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * 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 "BaseProfilingStack.h" + +#include <algorithm> + +#include "mozilla/IntegerRange.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/UniquePtrExtensions.h" + +#include "BaseProfiler.h" + +namespace mozilla { +namespace baseprofiler { + +ProfilingStack::~ProfilingStack() { + // The label macros keep a reference to the ProfilingStack to avoid a TLS + // access. If these are somehow not all cleared we will get a + // use-after-free so better to crash now. + MOZ_RELEASE_ASSERT(stackPointer == 0); + + delete[] frames; +} + +void ProfilingStack::ensureCapacitySlow() { + MOZ_ASSERT(stackPointer >= capacity); + const uint32_t kInitialCapacity = 128; + + uint32_t sp = stackPointer; + auto newCapacity = + std::max(sp + 1, capacity ? capacity * 2 : kInitialCapacity); + + auto* newFrames = new ProfilingStackFrame[newCapacity]; + + // It's important that `frames` / `capacity` / `stackPointer` remain + // consistent here at all times. + for (auto i : IntegerRange(capacity)) { + newFrames[i] = frames[i]; + } + + ProfilingStackFrame* oldFrames = frames; + frames = newFrames; + capacity = newCapacity; + delete[] oldFrames; +} + +} // namespace baseprofiler +} // namespace mozilla |