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d9661aa556
Also refactor SharedMemoryBasic::SystemProtect to allow testing cases that are expected to fail. Depends on D26748 Differential Revision: https://phabricator.services.mozilla.com/D26749 --HG-- rename : ipc/moz.build => ipc/gtest/moz.build extra : moz-landing-system : lando
35 lines
1.1 KiB
C++
35 lines
1.1 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 <sys/mman.h> // mprotect
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#include <unistd.h> // sysconf
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#include "mozilla/ipc/SharedMemory.h"
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namespace mozilla {
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namespace ipc {
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void SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights) {
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if (!SystemProtectFallible(aAddr, aSize, aRights)) {
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MOZ_CRASH("can't mprotect()");
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}
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}
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bool SharedMemory::SystemProtectFallible(char* aAddr, size_t aSize,
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int aRights) {
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int flags = 0;
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if (aRights & RightsRead) flags |= PROT_READ;
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if (aRights & RightsWrite) flags |= PROT_WRITE;
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if (RightsNone == aRights) flags = PROT_NONE;
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return 0 == mprotect(aAddr, aSize, flags);
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}
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size_t SharedMemory::SystemPageSize() { return sysconf(_SC_PAGESIZE); }
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} // namespace ipc
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} // namespace mozilla
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