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Elliott Hugheseb847bc2013-10-09 15:50:50 -07001/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <pthread.h>
30
31#include "pthread_internal.h"
32
33#include "private/bionic_tls.h"
34
Elliott Hughes70b24b12013-11-15 11:51:07 -080035// This trampoline is called from the assembly __bionic_clone function.
36int __thread_entry(void* arg) {
37 pthread_internal_t* thread = reinterpret_cast<pthread_internal_t*>(arg);
38
Elliott Hugheseb847bc2013-10-09 15:50:50 -070039 // Wait for our creating thread to release us. This lets it have time to
40 // notify gdb about this thread before we start doing anything.
41 // This also provides the memory barrier needed to ensure that all memory
42 // accesses previously made by the creating thread are visible to us.
Elliott Hughes70b24b12013-11-15 11:51:07 -080043 pthread_mutex_t* start_mutex = (pthread_mutex_t*) &thread->tls[TLS_SLOT_START_MUTEX];
Elliott Hugheseb847bc2013-10-09 15:50:50 -070044 pthread_mutex_lock(start_mutex);
45 pthread_mutex_destroy(start_mutex);
46
Elliott Hugheseb847bc2013-10-09 15:50:50 -070047 __init_tls(thread);
48
Elliott Hughes70b24b12013-11-15 11:51:07 -080049 __init_alternate_signal_stack(thread);
50
Elliott Hugheseb847bc2013-10-09 15:50:50 -070051 if ((thread->internal_flags & PTHREAD_INTERNAL_FLAG_THREAD_INIT_FAILED) != 0) {
52 pthread_exit(NULL);
53 }
54
Elliott Hughes70b24b12013-11-15 11:51:07 -080055 void* result = thread->start_routine(thread->start_routine_arg);
Elliott Hugheseb847bc2013-10-09 15:50:50 -070056 pthread_exit(result);
Elliott Hughes70b24b12013-11-15 11:51:07 -080057
58 return 0;
Elliott Hugheseb847bc2013-10-09 15:50:50 -070059}