6fcba93b17
Prevent processes from blocking libc-reserved signals by filtering them out. Bug: http://b/73144101 Test: 32/64-bit bionic-unit-tests-glibc Test: 32/64-bit bionic-unit-tests on taimen Change-Id: Ibadcaa7f668ed8be885cc61b67fb4b611fce8b17
75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <signal.h>
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#include "private/sigrtmin.h"
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#include "private/SigSetConverter.h"
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extern "C" int __rt_sigprocmask(int, const sigset64_t*, sigset64_t*, size_t);
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//
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// These need to be kept separate from pthread_sigmask, sigblock, sigsetmask,
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// sighold, and sigset because libsigchain only intercepts sigprocmask so we
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// can't allow clang to decide to inline sigprocmask.
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//
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int sigprocmask(int how,
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const sigset_t* bionic_new_set,
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sigset_t* bionic_old_set) __attribute__((__noinline__)) {
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SigSetConverter new_set;
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sigset64_t* new_set_ptr = nullptr;
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if (bionic_new_set != nullptr) {
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sigemptyset64(&new_set.sigset64);
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new_set.sigset = *bionic_new_set;
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new_set_ptr = &new_set.sigset64;
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}
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SigSetConverter old_set;
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if (sigprocmask64(how, new_set_ptr, &old_set.sigset64) == -1) {
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return -1;
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}
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if (bionic_old_set != nullptr) {
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*bionic_old_set = old_set.sigset;
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}
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return 0;
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}
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int sigprocmask64(int how,
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const sigset64_t* new_set,
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sigset64_t* old_set) __attribute__((__noinline__)) {
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sigset64_t mutable_new_set;
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sigset64_t* mutable_new_set_ptr = nullptr;
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if (new_set) {
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mutable_new_set = filter_reserved_signals(*new_set);
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mutable_new_set_ptr = &mutable_new_set;
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}
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return __rt_sigprocmask(how, mutable_new_set_ptr, old_set, sizeof(*new_set));
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}
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