/src/openssl32/crypto/threads_pthread.c

Source
/*
 * Copyright 2016-2025 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* We need to use the OPENSSL_fork_*() deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED

#include <openssl/crypto.h>
#include "internal/cryptlib.h"

#if defined(__sun)
# include <atomic.h>
#endif

#if defined(__apple_build_version__) && __apple_build_version__ < 6000000
/*
 * OS/X 10.7 and 10.8 had a weird version of clang which has __ATOMIC_ACQUIRE and
 * __ATOMIC_ACQ_REL but which expects only one parameter for __atomic_is_lock_free()
 * rather than two which has signature __atomic_is_lock_free(sizeof(_Atomic(T))).
 * All of this makes impossible to use __atomic_is_lock_free here.
 *
 * See: https://github.com/llvm/llvm-project/commit/a4c2602b714e6c6edb98164550a5ae829b2de760
 */
#define BROKEN_CLANG_ATOMICS
#endif

#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)

# if defined(OPENSSL_SYS_UNIX)
#  include <sys/types.h>
#  include <unistd.h>
#endif

# include <assert.h>

/*
 * The Non-Stop KLT thread model currently seems broken in its rwlock
 * implementation
 * Likewise is there a problem with the glibc implementation on riscv.
 */
# if defined(PTHREAD_RWLOCK_INITIALIZER) && !defined(_KLT_MODEL_) \
                                         && !defined(__riscv)
#  define USE_RWLOCK
# endif

CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
{
# ifdef USE_RWLOCK
    CRYPTO_RWLOCK *lock;

    if ((lock = CRYPTO_zalloc(sizeof(pthread_rwlock_t), NULL, 0)) == NULL)
        /* Don't set error, to avoid recursion blowup. */
        return NULL;

    if (pthread_rwlock_init(lock, NULL) != 0) {
        OPENSSL_free(lock);
        return NULL;
    }
# else
    pthread_mutexattr_t attr;
    CRYPTO_RWLOCK *lock;

    if ((lock = CRYPTO_zalloc(sizeof(pthread_mutex_t), NULL, 0)) == NULL)
        /* Don't set error, to avoid recursion blowup. */
        return NULL;

    /*
     * We don't use recursive mutexes, but try to catch errors if we do.
     */
    pthread_mutexattr_init(&attr);
#  if !defined (__TANDEM) && !defined (_SPT_MODEL_)
#   if !defined(NDEBUG) && !defined(OPENSSL_NO_MUTEX_ERRORCHECK)
    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
#   endif
#  else
    /* The SPT Thread Library does not define MUTEX attributes. */
#  endif

    if (pthread_mutex_init(lock, &attr) != 0) {
        pthread_mutexattr_destroy(&attr);
        OPENSSL_free(lock);
        return NULL;
    }

    pthread_mutexattr_destroy(&attr);
# endif

    return lock;
}

__owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
{
# ifdef USE_RWLOCK
    if (pthread_rwlock_rdlock(lock) != 0)
        return 0;
# else
    if (pthread_mutex_lock(lock) != 0) {
        assert(errno != EDEADLK && errno != EBUSY);
        return 0;
    }
# endif

    return 1;
}

__owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
{
# ifdef USE_RWLOCK
    if (pthread_rwlock_wrlock(lock) != 0)
        return 0;
# else
    if (pthread_mutex_lock(lock) != 0) {
        assert(errno != EDEADLK && errno != EBUSY);
        return 0;
    }
# endif

    return 1;
}

int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
{
# ifdef USE_RWLOCK
    if (pthread_rwlock_unlock(lock) != 0)
        return 0;
# else
    if (pthread_mutex_unlock(lock) != 0) {
        assert(errno != EPERM);
        return 0;
    }
# endif

    return 1;
}

void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
{
    if (lock == NULL)
        return;

# ifdef USE_RWLOCK
    pthread_rwlock_destroy(lock);
# else
    pthread_mutex_destroy(lock);
# endif
    OPENSSL_free(lock);

    return;
}

int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
{
    if (pthread_once(once, init) != 0)
        return 0;

    return 1;
}

int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
{
    if (pthread_key_create(key, cleanup) != 0)
        return 0;

    return 1;
}

void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
{
    return pthread_getspecific(*key);
}

int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
{
    if (pthread_setspecific(*key, val) != 0)
        return 0;

    return 1;
}

int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
{
    if (pthread_key_delete(*key) != 0)
        return 0;

    return 1;
}

CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
{
    return pthread_self();
}

int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
{
    return pthread_equal(a, b);
}

int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
    if (__atomic_is_lock_free(sizeof(*val), val)) {
        *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
        return 1;
    }
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
    /* This will work for all future Solaris versions. */
    if (ret != NULL) {
        *ret = atomic_add_int_nv((volatile unsigned int *)val, amount);
        return 1;
    }
# endif
    if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
        return 0;

    *val += amount;
    *ret  = *val;

    if (!CRYPTO_THREAD_unlock(lock))
        return 0;

    return 1;
}

int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
                     CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
    if (__atomic_is_lock_free(sizeof(*val), val)) {
        *ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL);
        return 1;
    }
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
    /* This will work for all future Solaris versions. */
    if (ret != NULL) {
        *ret = atomic_or_64_nv(val, op);
        return 1;
    }
# endif
    if (lock == NULL || !CRYPTO_THREAD_write_lock(lock))
        return 0;
    *val |= op;
    *ret  = *val;

    if (!CRYPTO_THREAD_unlock(lock))
        return 0;

    return 1;
}

int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
    if (__atomic_is_lock_free(sizeof(*val), val)) {
        __atomic_load(val, ret, __ATOMIC_ACQUIRE);
        return 1;
    }
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
    /* This will work for all future Solaris versions. */
    if (ret != NULL) {
        *ret = atomic_or_64_nv(val, 0);
        return 1;
    }
# endif
    if (lock == NULL || !CRYPTO_THREAD_read_lock(lock))
        return 0;
    *ret  = *val;
    if (!CRYPTO_THREAD_unlock(lock))
        return 0;

    return 1;
}

int CRYPTO_atomic_load_int(int *val, int *ret, CRYPTO_RWLOCK *lock)
{
# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
    if (__atomic_is_lock_free(sizeof(*val), val)) {
        __atomic_load(val, ret, __ATOMIC_ACQUIRE);
        return 1;
    }
# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11))
    /* This will work for all future Solaris versions. */
    if (ret != NULL) {
        *ret = (int *)atomic_or_uint_nv((unsigned int *)val, 0);
        return 1;
    }
# endif
    if (lock == NULL || !CRYPTO_THREAD_read_lock(lock))
        return 0;
    *ret  = *val;
    if (!CRYPTO_THREAD_unlock(lock))
        return 0;

    return 1;
}

# ifndef FIPS_MODULE
int openssl_init_fork_handlers(void)
{
    return 1;
}
# endif /* FIPS_MODULE */

int openssl_get_fork_id(void)
{
    return getpid();
}
#endif

Coverage Report

Created: 2025-11-16 06:40

Line	Count	Source
1		/*
2		* Copyright 2016-2025 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		/* We need to use the OPENSSL_fork_() deprecated APIs /
11		#define OPENSSL_SUPPRESS_DEPRECATED
12
13		#include <openssl/crypto.h>
14		#include "internal/cryptlib.h"
15
16		#if defined(__sun)
17		# include <atomic.h>
18		#endif
19
20		#if defined(__apple_build_version__) && __apple_build_version__ < 6000000
21		/*
22		* OS/X 10.7 and 10.8 had a weird version of clang which has __ATOMIC_ACQUIRE and
23		* __ATOMIC_ACQ_REL but which expects only one parameter for __atomic_is_lock_free()
24		* rather than two which has signature __atomic_is_lock_free(sizeof(_Atomic(T))).
25		* All of this makes impossible to use __atomic_is_lock_free here.
26		*
27		* See: https://github.com/llvm/llvm-project/commit/a4c2602b714e6c6edb98164550a5ae829b2de760
28		*/
29		#define BROKEN_CLANG_ATOMICS
30		#endif
31
32		#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
33
34		# if defined(OPENSSL_SYS_UNIX)
35		# include <sys/types.h>
36		# include <unistd.h>
37		#endif
38
39		# include <assert.h>
40
41		/*
42		* The Non-Stop KLT thread model currently seems broken in its rwlock
43		* implementation
44		* Likewise is there a problem with the glibc implementation on riscv.
45		*/
46		# if defined(PTHREAD_RWLOCK_INITIALIZER) && !defined(_KLT_MODEL_) \
47		&& !defined(__riscv)
48		# define USE_RWLOCK
49		# endif
50
51		CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
52	9.94M	{
53	9.94M	# ifdef USE_RWLOCK
54	9.94M	CRYPTO_RWLOCK *lock;
55
56	9.94M	if ((lock = CRYPTO_zalloc(sizeof(pthread_rwlock_t), NULL, 0)) == NULL)
57		/* Don't set error, to avoid recursion blowup. */
58	0	return NULL;
59
60	9.94M	if (pthread_rwlock_init(lock, NULL) != 0) {
61	0	OPENSSL_free(lock);
62	0	return NULL;
63	0	}
64		# else
65		pthread_mutexattr_t attr;
66		CRYPTO_RWLOCK *lock;
67
68		if ((lock = CRYPTO_zalloc(sizeof(pthread_mutex_t), NULL, 0)) == NULL)
69		/* Don't set error, to avoid recursion blowup. */
70		return NULL;
71
72		/*
73		* We don't use recursive mutexes, but try to catch errors if we do.
74		*/
75		pthread_mutexattr_init(&attr);
76		# if !defined (__TANDEM) && !defined (_SPT_MODEL_)
77		# if !defined(NDEBUG) && !defined(OPENSSL_NO_MUTEX_ERRORCHECK)
78		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
79		# endif
80		# else
81		/* The SPT Thread Library does not define MUTEX attributes. */
82		# endif
83
84		if (pthread_mutex_init(lock, &attr) != 0) {
85		pthread_mutexattr_destroy(&attr);
86		OPENSSL_free(lock);
87		return NULL;
88		}
89
90		pthread_mutexattr_destroy(&attr);
91		# endif
92
93	9.94M	return lock;
94	9.94M	}
95
96		__owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
97	1.09G	{
98	1.09G	# ifdef USE_RWLOCK
99	1.09G	if (pthread_rwlock_rdlock(lock) != 0)
100	0	return 0;
101		# else
102		if (pthread_mutex_lock(lock) != 0) {
103		assert(errno != EDEADLK && errno != EBUSY);
104		return 0;
105		}
106		# endif
107
108	1.09G	return 1;
109	1.09G	}
110
111		__owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
112	77.7M	{
113	77.7M	# ifdef USE_RWLOCK
114	77.7M	if (pthread_rwlock_wrlock(lock) != 0)
115	0	return 0;
116		# else
117		if (pthread_mutex_lock(lock) != 0) {
118		assert(errno != EDEADLK && errno != EBUSY);
119		return 0;
120		}
121		# endif
122
123	77.7M	return 1;
124	77.7M	}
125
126		int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
127	1.26G	{
128	1.26G	# ifdef USE_RWLOCK
129	1.26G	if (pthread_rwlock_unlock(lock) != 0)
130	0	return 0;
131		# else
132		if (pthread_mutex_unlock(lock) != 0) {
133		assert(errno != EPERM);
134		return 0;
135		}
136		# endif
137
138	1.26G	return 1;
139	1.26G	}
140
141		void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
142	9.94M	{
143	9.94M	if (lock == NULL)
144	2.20k	return;
145
146	9.94M	# ifdef USE_RWLOCK
147	9.94M	pthread_rwlock_destroy(lock);
148		# else
149		pthread_mutex_destroy(lock);
150		# endif
151	9.94M	OPENSSL_free(lock);
152
153	9.94M	return;
154	9.94M	}
155
156		int CRYPTO_THREAD_run_once(CRYPTO_ONCE once, void (init)(void))
157	2.92G	{
158	2.92G	if (pthread_once(once, init) != 0)
159	0	return 0;
160
161	2.92G	return 1;
162	2.92G	}
163
164		int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL key, void (cleanup)(void *))
165	1.89k	{
166	1.89k	if (pthread_key_create(key, cleanup) != 0)
167	0	return 0;
168
169	1.89k	return 1;
170	1.89k	}
171
172		void CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL key)
173	1.83G	{
174	1.83G	return pthread_getspecific(*key);
175	1.83G	}
176
177		int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL key, void val)
178	1.91k	{
179	1.91k	if (pthread_setspecific(*key, val) != 0)
180	0	return 0;
181
182	1.91k	return 1;
183	1.91k	}
184
185		int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
186	1.57k	{
187	1.57k	if (pthread_key_delete(*key) != 0)
188	0	return 0;
189
190	1.57k	return 1;
191	1.57k	}
192
193		CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
194	183k	{
195	183k	return pthread_self();
196	183k	}
197
198		int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
199	11.8k	{
200	11.8k	return pthread_equal(a, b);
201	11.8k	}
202
203		int CRYPTO_atomic_add(int val, int amount, int ret, CRYPTO_RWLOCK *lock)
204	10.9M	{
205	10.9M	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
206	10.9M	if (__atomic_is_lock_free(sizeof(*val), val)) {
207	10.9M	*ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
208	10.9M	return 1;
209	10.9M	}
210		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
211		/* This will work for all future Solaris versions. */
212		if (ret != NULL) {
213		ret = atomic_add_int_nv((volatile unsigned int )val, amount);
214		return 1;
215		}
216		# endif
217	0	if (lock == NULL \|\| !CRYPTO_THREAD_write_lock(lock))
218	0	return 0;
219
220	0	*val += amount;
221	0	ret = val;
222
223	0	if (!CRYPTO_THREAD_unlock(lock))
224	0	return 0;
225
226	0	return 1;
227	0	}
228
229		int CRYPTO_atomic_or(uint64_t val, uint64_t op, uint64_t ret,
230		CRYPTO_RWLOCK *lock)
231	644	{
232	644	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
233	644	if (__atomic_is_lock_free(sizeof(*val), val)) {
234	644	*ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL);
235	644	return 1;
236	644	}
237		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
238		/* This will work for all future Solaris versions. */
239		if (ret != NULL) {
240		*ret = atomic_or_64_nv(val, op);
241		return 1;
242		}
243		# endif
244	0	if (lock == NULL \|\| !CRYPTO_THREAD_write_lock(lock))
245	0	return 0;
246	0	*val \|= op;
247	0	ret = val;
248
249	0	if (!CRYPTO_THREAD_unlock(lock))
250	0	return 0;
251
252	0	return 1;
253	0	}
254
255		int CRYPTO_atomic_load(uint64_t val, uint64_t ret, CRYPTO_RWLOCK *lock)
256	2.43G	{
257	2.43G	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
258	2.43G	if (__atomic_is_lock_free(sizeof(*val), val)) {
259	2.43G	__atomic_load(val, ret, __ATOMIC_ACQUIRE);
260	2.43G	return 1;
261	2.43G	}
262		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
263		/* This will work for all future Solaris versions. */
264		if (ret != NULL) {
265		*ret = atomic_or_64_nv(val, 0);
266		return 1;
267		}
268		# endif
269	0	if (lock == NULL \|\| !CRYPTO_THREAD_read_lock(lock))
270	0	return 0;
271	0	ret = val;
272	0	if (!CRYPTO_THREAD_unlock(lock))
273	0	return 0;
274
275	0	return 1;
276	0	}
277
278		int CRYPTO_atomic_load_int(int val, int ret, CRYPTO_RWLOCK *lock)
279	0	{
280	0	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
281	0	if (__atomic_is_lock_free(sizeof(*val), val)) {
282	0	__atomic_load(val, ret, __ATOMIC_ACQUIRE);
283	0	return 1;
284	0	}
285		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
286		/* This will work for all future Solaris versions. */
287		if (ret != NULL) {
288		ret = (int )atomic_or_uint_nv((unsigned int *)val, 0);
289		return 1;
290		}
291		# endif
292	0	if (lock == NULL \|\| !CRYPTO_THREAD_read_lock(lock))
293	0	return 0;
294	0	ret = val;
295	0	if (!CRYPTO_THREAD_unlock(lock))
296	0	return 0;
297
298	0	return 1;
299	0	}
300
301		# ifndef FIPS_MODULE
302		int openssl_init_fork_handlers(void)
303	0	{
304	0	return 1;
305	0	}
306		# endif /* FIPS_MODULE */
307
308		int openssl_get_fork_id(void)
309	74.8k	{
310	74.8k	return getpid();
311	74.8k	}
312		#endif