/src/openssl30/crypto/threads_pthread.c

Source (jump to first uncovered line)
/*
 * Copyright 2016-2022 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>

# ifdef PTHREAD_RWLOCK_INITIALIZER
#  define USE_RWLOCK
# endif

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

    if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == 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 = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == 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);
#   else
    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
#   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_ACQUIRE) && !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;
}
# 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: 2023-06-08 06:40

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2016-2022 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		# ifdef PTHREAD_RWLOCK_INITIALIZER
42		# define USE_RWLOCK
43		# endif
44
45		CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
46	3.47k	{
47	3.47k	# ifdef USE_RWLOCK
48	3.47k	CRYPTO_RWLOCK *lock;
49
50	3.47k	if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) {
51		/* Don't set error, to avoid recursion blowup. */
52	0	return NULL;
53	0	}
54
55	3.47k	if (pthread_rwlock_init(lock, NULL) != 0) {
56	0	OPENSSL_free(lock);
57	0	return NULL;
58	0	}
59		# else
60		pthread_mutexattr_t attr;
61		CRYPTO_RWLOCK *lock;
62
63		if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) {
64		/* Don't set error, to avoid recursion blowup. */
65		return NULL;
66		}
67
68		/*
69		* We don't use recursive mutexes, but try to catch errors if we do.
70		*/
71		pthread_mutexattr_init(&attr);
72		# if !defined (__TANDEM) && !defined (_SPT_MODEL_)
73		# if !defined(NDEBUG) && !defined(OPENSSL_NO_MUTEX_ERRORCHECK)
74		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
75		# else
76		pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
77		# endif
78		# else
79		/* The SPT Thread Library does not define MUTEX attributes. */
80		# endif
81
82		if (pthread_mutex_init(lock, &attr) != 0) {
83		pthread_mutexattr_destroy(&attr);
84		OPENSSL_free(lock);
85		return NULL;
86		}
87
88		pthread_mutexattr_destroy(&attr);
89		# endif
90
91	3.47k	return lock;
92	3.47k	}
93
94		__owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
95	198	{
96	198	# ifdef USE_RWLOCK
97	198	if (pthread_rwlock_rdlock(lock) != 0)
98	0	return 0;
99		# else
100		if (pthread_mutex_lock(lock) != 0) {
101		assert(errno != EDEADLK && errno != EBUSY);
102		return 0;
103		}
104		# endif
105
106	198	return 1;
107	198	}
108
109		__owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
110	7.09k	{
111	7.09k	# ifdef USE_RWLOCK
112	7.09k	if (pthread_rwlock_wrlock(lock) != 0)
113	0	return 0;
114		# else
115		if (pthread_mutex_lock(lock) != 0) {
116		assert(errno != EDEADLK && errno != EBUSY);
117		return 0;
118		}
119		# endif
120
121	7.09k	return 1;
122	7.09k	}
123
124		int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
125	7.29k	{
126	7.29k	# ifdef USE_RWLOCK
127	7.29k	if (pthread_rwlock_unlock(lock) != 0)
128	0	return 0;
129		# else
130		if (pthread_mutex_unlock(lock) != 0) {
131		assert(errno != EPERM);
132		return 0;
133		}
134		# endif
135
136	7.29k	return 1;
137	7.29k	}
138
139		void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
140	3.48k	{
141	3.48k	if (lock == NULL)
142	10	return;
143
144	3.47k	# ifdef USE_RWLOCK
145	3.47k	pthread_rwlock_destroy(lock);
146		# else
147		pthread_mutex_destroy(lock);
148		# endif
149	3.47k	OPENSSL_free(lock);
150
151	3.47k	return;
152	3.48k	}
153
154		int CRYPTO_THREAD_run_once(CRYPTO_ONCE once, void (init)(void))
155	49.8k	{
156	49.8k	if (pthread_once(once, init) != 0)
157	0	return 0;
158
159	49.8k	return 1;
160	49.8k	}
161
162		int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL key, void (cleanup)(void *))
163	8	{
164	8	if (pthread_key_create(key, cleanup) != 0)
165	0	return 0;
166
167	8	return 1;
168	8	}
169
170		void CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL key)
171	28.2k	{
172	28.2k	return pthread_getspecific(*key);
173	28.2k	}
174
175		int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL key, void val)
176	10	{
177	10	if (pthread_setspecific(*key, val) != 0)
178	0	return 0;
179
180	10	return 1;
181	10	}
182
183		int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
184	8	{
185	8	if (pthread_key_delete(*key) != 0)
186	0	return 0;
187
188	8	return 1;
189	8	}
190
191		CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
192	0	{
193	0	return pthread_self();
194	0	}
195
196		int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
197	0	{
198	0	return pthread_equal(a, b);
199	0	}
200
201		int CRYPTO_atomic_add(int val, int amount, int ret, CRYPTO_RWLOCK *lock)
202	0	{
203	0	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
204	0	if (__atomic_is_lock_free(sizeof(*val), val)) {
205	0	*ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
206	0	return 1;
207	0	}
208		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
209		/* This will work for all future Solaris versions. */
210		if (ret != NULL) {
211		ret = atomic_add_int_nv((volatile unsigned int )val, amount);
212		return 1;
213		}
214		# endif
215	0	if (lock == NULL \|\| !CRYPTO_THREAD_write_lock(lock))
216	0	return 0;
217
218	0	*val += amount;
219	0	ret = val;
220
221	0	if (!CRYPTO_THREAD_unlock(lock))
222	0	return 0;
223
224	0	return 1;
225	0	}
226
227		int CRYPTO_atomic_or(uint64_t val, uint64_t op, uint64_t ret,
228		CRYPTO_RWLOCK *lock)
229	2	{
230	2	# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) && !defined(BROKEN_CLANG_ATOMICS)
231	2	if (__atomic_is_lock_free(sizeof(*val), val)) {
232	2	*ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL);
233	2	return 1;
234	2	}
235		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
236		/* This will work for all future Solaris versions. */
237		if (ret != NULL) {
238		*ret = atomic_or_64_nv(val, op);
239		return 1;
240		}
241		# endif
242	0	if (lock == NULL \|\| !CRYPTO_THREAD_write_lock(lock))
243	0	return 0;
244	0	*val \|= op;
245	0	ret = val;
246
247	0	if (!CRYPTO_THREAD_unlock(lock))
248	0	return 0;
249
250	0	return 1;
251	0	}
252
253		int CRYPTO_atomic_load(uint64_t val, uint64_t ret, CRYPTO_RWLOCK *lock)
254	21.4k	{
255	21.4k	# if defined(__GNUC__) && defined(__ATOMIC_ACQUIRE) && !defined(BROKEN_CLANG_ATOMICS)
256	21.4k	if (__atomic_is_lock_free(sizeof(*val), val)) {
257	21.4k	__atomic_load(val, ret, __ATOMIC_ACQUIRE);
258	21.4k	return 1;
259	21.4k	}
260		# elif defined(__sun) && (defined(__SunOS_5_10) \|\| defined(__SunOS_5_11))
261		/* This will work for all future Solaris versions. */
262		if (ret != NULL) {
263		*ret = atomic_or_64_nv(val, 0);
264		return 1;
265		}
266		# endif
267	0	if (lock == NULL \|\| !CRYPTO_THREAD_read_lock(lock))
268	0	return 0;
269	0	ret = val;
270	0	if (!CRYPTO_THREAD_unlock(lock))
271	0	return 0;
272
273	0	return 1;
274	0	}
275		# ifndef FIPS_MODULE
276		int openssl_init_fork_handlers(void)
277	0	{
278	0	return 1;
279	0	}
280		# endif /* FIPS_MODULE */
281
282		int openssl_get_fork_id(void)
283	0	{
284	0	return getpid();
285	0	}
286		#endif