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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 /dom/ipc/MemMapSnapshot.cpp | |
parent | Initial commit. (diff) | |
download | firefox-e51783d008170d9ab27d25da98ca3a38b0a41b67.tar.xz firefox-e51783d008170d9ab27d25da98ca3a38b0a41b67.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/ipc/MemMapSnapshot.cpp')
-rw-r--r-- | dom/ipc/MemMapSnapshot.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/dom/ipc/MemMapSnapshot.cpp b/dom/ipc/MemMapSnapshot.cpp new file mode 100644 index 0000000000..53accfdb1b --- /dev/null +++ b/dom/ipc/MemMapSnapshot.cpp @@ -0,0 +1,45 @@ +/* -*- 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 "MemMapSnapshot.h" + +#include "mozilla/AutoMemMap.h" +#include "mozilla/ResultExtensions.h" +#include "mozilla/Try.h" +#include "mozilla/ipc/FileDescriptor.h" + +namespace mozilla::ipc { + +Result<Ok, nsresult> MemMapSnapshot::Init(size_t aSize) { + MOZ_ASSERT(!mInitialized); + + if (NS_WARN_IF(!mMem.CreateFreezeable(aSize))) { + return Err(NS_ERROR_FAILURE); + } + if (NS_WARN_IF(!mMem.Map(aSize))) { + return Err(NS_ERROR_FAILURE); + } + + mInitialized = true; + return Ok(); +} + +Result<Ok, nsresult> MemMapSnapshot::Finalize(loader::AutoMemMap& aMem) { + MOZ_ASSERT(mInitialized); + + if (NS_WARN_IF(!mMem.Freeze())) { + return Err(NS_ERROR_FAILURE); + } + // TakeHandle resets mMem, so call max_size first. + size_t size = mMem.max_size(); + FileDescriptor memHandle(mMem.TakeHandle()); + MOZ_TRY(aMem.initWithHandle(memHandle, size)); + + mInitialized = false; + return Ok(); +} + +} // namespace mozilla::ipc |