e462117087
This was previously done only in fork() and pthread_create(), but this left raw clone() with an invalid cached tid. Since the tid is used for pthread routines, this led to unstable behavior after clone(). Test: ltp clone01 (see bug for more) Test: mmma bionic/tests Test: bionic-unit-tests-static --gtest_filter=*fork*:*clone* Bug: 32612735 Bug: 32305649 Change-Id: I30eae5a8024b4c5da65476fcadfe14c6db35bb79
55 lines
2.1 KiB
C++
55 lines
2.1 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 <unistd.h>
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#include <sys/syscall.h>
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#include "pthread_internal.h"
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int fork() {
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__bionic_atfork_run_prepare();
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pthread_internal_t* self = __get_thread();
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int result = clone(nullptr,
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nullptr,
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(CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD),
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nullptr,
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nullptr,
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nullptr,
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&(self->tid));
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if (result == 0) {
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// Update the cached pid, since clone() will not set it directly (as
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// self->tid is updated by the kernel).
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self->set_cached_pid(gettid());
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__bionic_atfork_run_child();
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} else {
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__bionic_atfork_run_parent();
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}
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return result;
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}
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