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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/librthread/rthread_fork.c	Lines:	11	24	45.8 %
Date:	2017-11-07	Branches:	4	12	33.3 %


/*	$OpenBSD: rthread_fork.c,v 1.22 2017/09/05 02:40:54 guenther Exp $ */

/*
 * Copyright (c) 2008 Kurt Miller <kurt@openbsd.org>
 * Copyright (c) 2008 Philip Guenther <guenther@openbsd.org>
 * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: /repoman/r/ncvs/src/lib/libc_r/uthread/uthread_atfork.c,v 1.1 2004/12/10 03:36:45 grog Exp $
 */

#ifndef NO_PIC
#include <sys/types.h>
#include <sys/exec_elf.h>
#pragma weak _DYNAMIC
#endif

#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <tib.h>
#include <unistd.h>

#include "rthread.h"
#include "rthread_cb.h"

/* make {fork,vfork,getthrid} call _thread_sys_{fork,vfork,getthrid} */
REDIRECT_SYSCALL(fork);
REDIRECT_SYSCALL(vfork);
REDIRECT_SYSCALL(getthrid);

static pid_t
_dofork(pid_t (*sys_fork)(void))
{
	pthread_t me;
	pid_t newid;
	extern int _post_threaded;

	if (!_threads_ready)
		return sys_fork();

	me = pthread_self();

	/*
	 * Protect important libc/ld.so critical areas across the fork call.
	 * dlclose() will grab the atexit lock via __cxa_finalize() so lock
	 * the dl_lock first. malloc()/free() can use arc4random(), so lock
	 * malloc_lock before arc4_lock
	 */

#ifndef NO_PIC
	if (_DYNAMIC)
		_rthread_dl_lock(0);
#endif

	newid = _thread_dofork(sys_fork);

	if (newid == 0) {
		struct tib *tib = me->tib;
#ifndef NO_PIC
		/* reinitialize the lock in the child */
		if (_DYNAMIC)
			_rthread_dl_lock(2);
#endif
		/* update this thread's structure */
		tib->tib_tid = getthrid();
		me->donesem.lock = _SPINLOCK_UNLOCKED;
		me->flags_lock = _SPINLOCK_UNLOCKED;

		/* reinit the thread list */
		LIST_INIT(&_thread_list);
		LIST_INSERT_HEAD(&_thread_list, me, threads);
		_thread_lock = _SPINLOCK_UNLOCKED;

		/* single threaded now */
		__isthreaded = 0;
		_post_threaded = 0; /* notyet... */
	}
#ifndef NO_PIC
	else if (_DYNAMIC)
		_rthread_dl_lock(1);
#endif
	return newid;
}

pid_t
_thread_fork(void)
{
	return _dofork(&fork);
}

pid_t
_thread_vfork(void)
{
	return _dofork(&vfork);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rthread_fork.c,v 1.22 2017/09/05 02:40:54 guenther Exp $ */
2
3			/*
4			* Copyright (c) 2008 Kurt Miller <kurt@openbsd.org>
5			* Copyright (c) 2008 Philip Guenther <guenther@openbsd.org>
6			* Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>
7			* All rights reserved.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Neither the name of the author nor the names of any co-contributors
15			* may be used to endorse or promote products derived from this software
16			* without specific prior written permission.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28			* SUCH DAMAGE.
29			*
30			* $FreeBSD: /repoman/r/ncvs/src/lib/libc_r/uthread/uthread_atfork.c,v 1.1 2004/12/10 03:36:45 grog Exp $
31			*/
32
33			#ifndef NO_PIC
34			#include <sys/types.h>
35			#include <sys/exec_elf.h>
36			#pragma weak _DYNAMIC
37			#endif
38
39			#include <errno.h>
40			#include <pthread.h>
41			#include <stdio.h>
42			#include <stdlib.h>
43			#include <tib.h>
44			#include <unistd.h>
45
46			#include "rthread.h"
47			#include "rthread_cb.h"
48
49			/* make {fork,vfork,getthrid} call _thread_sys_{fork,vfork,getthrid} */
50			REDIRECT_SYSCALL(fork);
51			REDIRECT_SYSCALL(vfork);
52			REDIRECT_SYSCALL(getthrid);
53
54			static pid_t
55			_dofork(pid_t (*sys_fork)(void))
56			{
57			pthread_t me;
58			pid_t newid;
59			extern int _post_threaded;
60
61	✗✓	94208	if (!_threads_ready)
62			return sys_fork();
63
64		47104	me = pthread_self();
65
66			/*
67			* Protect important libc/ld.so critical areas across the fork call.
68			* dlclose() will grab the atexit lock via __cxa_finalize() so lock
69			* the dl_lock first. malloc()/free() can use arc4random(), so lock
70			* malloc_lock before arc4_lock
71			*/
72
73			#ifndef NO_PIC
74	✓✗	47104	if (_DYNAMIC)
75		47104	_rthread_dl_lock(0);
76			#endif
77
78		47104	newid = _thread_dofork(sys_fork);
79
80	✗✓	47104	if (newid == 0) {
81			struct tib *tib = me->tib;
82			#ifndef NO_PIC
83			/* reinitialize the lock in the child */
84			if (_DYNAMIC)
85			_rthread_dl_lock(2);
86			#endif
87			/* update this thread's structure */
88			tib->tib_tid = getthrid();
89			me->donesem.lock = _SPINLOCK_UNLOCKED;
90			me->flags_lock = _SPINLOCK_UNLOCKED;
91
92			/* reinit the thread list */
93			LIST_INIT(&_thread_list);
94			LIST_INSERT_HEAD(&_thread_list, me, threads);
95			_thread_lock = _SPINLOCK_UNLOCKED;
96
97			/* single threaded now */
98			__isthreaded = 0;
99			_post_threaded = 0; /* notyet... */
100			}
101			#ifndef NO_PIC
102	✓✗	47104	else if (_DYNAMIC)
103		47104	_rthread_dl_lock(1);
104			#endif
105		47104	return newid;
106		47104	}
107
108			pid_t
109			_thread_fork(void)
110			{
111		94208	return _dofork(&fork);
112			}
113
114			pid_t
115			_thread_vfork(void)
116			{
117			return _dofork(&vfork);
118			}