1 /* Copyright (c) 2002-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* SimGrid's pthread interposer. Redefinition of the pthread symbols (see the comment in sthread.h) */
9 #include "src/sthread/sthread.h"
10 #include "src/internal_config.h"
13 #include <semaphore.h>
19 #include <valgrind/valgrind.h>
22 /* We don't want to intercept pthread within SimGrid. Instead we should provide the real implem to SimGrid */
23 static int (*raw_pthread_create)(pthread_t*, const pthread_attr_t*, void* (*)(void*), void*);
24 static int (*raw_pthread_join)(pthread_t, void**);
25 static int (*raw_pthread_mutex_init)(pthread_mutex_t*, const pthread_mutexattr_t*);
26 static int (*raw_pthread_mutex_lock)(pthread_mutex_t*);
27 static int (*raw_pthread_mutex_trylock)(pthread_mutex_t*);
28 static int (*raw_pthread_mutex_unlock)(pthread_mutex_t*);
29 static int (*raw_pthread_mutex_destroy)(pthread_mutex_t*);
31 static int (*raw_pthread_mutexattr_init)(pthread_mutexattr_t*);
32 static int (*raw_pthread_mutexattr_settype)(pthread_mutexattr_t*, int);
33 static int (*raw_pthread_mutexattr_gettype)(const pthread_mutexattr_t* restrict, int* restrict);
34 static int (*raw_pthread_mutexattr_getrobust)(const pthread_mutexattr_t*, int*);
35 static int (*raw_pthread_mutexattr_setrobust)(pthread_mutexattr_t*, int);
37 static int (*raw_pthread_barrier_init)(pthread_barrier_t*, const pthread_barrierattr_t*, unsigned int count);
38 static int (*raw_pthread_barrier_wait)(pthread_barrier_t*);
39 static int (*raw_pthread_barrier_destroy)(pthread_barrier_t*);
41 static unsigned int (*raw_sleep)(unsigned int);
42 static int (*raw_usleep)(useconds_t);
43 static int (*raw_gettimeofday)(struct timeval*, void*);
45 static sem_t* (*raw_sem_open)(const char*, int);
46 static int (*raw_sem_init)(sem_t*, int, unsigned int);
47 static int (*raw_sem_wait)(sem_t*);
48 static int (*raw_sem_post)(sem_t*);
49 static int (*raw_sem_destroy)(sem_t*);
50 static int (*raw_sem_trywait)(sem_t*);
51 static int (*raw_sem_timedwait)(sem_t*, const struct timespec*);
53 static void intercepter_init()
55 raw_pthread_create = dlsym(RTLD_NEXT, "pthread_create");
56 raw_pthread_join = dlsym(RTLD_NEXT, "pthread_join");
57 raw_pthread_mutex_init = dlsym(RTLD_NEXT, "pthread_mutex_init");
58 raw_pthread_mutex_lock = dlsym(RTLD_NEXT, "pthread_mutex_lock");
59 raw_pthread_mutex_trylock = dlsym(RTLD_NEXT, "pthread_mutex_trylock");
60 raw_pthread_mutex_unlock = dlsym(RTLD_NEXT, "pthread_mutex_unlock");
61 raw_pthread_mutex_destroy = dlsym(RTLD_NEXT, "pthread_mutex_destroy");
63 raw_pthread_mutexattr_init = dlsym(RTLD_NEXT, "pthread_mutexattr_init");
64 raw_pthread_mutexattr_settype = dlsym(RTLD_NEXT, "pthread_mutexattr_settype");
65 raw_pthread_mutexattr_gettype = dlsym(RTLD_NEXT, "pthread_mutexattr_gettype");
66 raw_pthread_mutexattr_getrobust = dlsym(RTLD_NEXT, "pthread_mutexattr_getrobust");
67 raw_pthread_mutexattr_setrobust = dlsym(RTLD_NEXT, "pthread_mutexattr_setrobust");
69 raw_pthread_barrier_init = dlsym(RTLD_NEXT, "raw_pthread_barrier_init");
70 raw_pthread_barrier_wait = dlsym(RTLD_NEXT, "raw_pthread_barrier_wait");
71 raw_pthread_barrier_destroy = dlsym(RTLD_NEXT, "raw_pthread_barrier_destroy");
73 raw_sleep = dlsym(RTLD_NEXT, "sleep");
74 raw_usleep = dlsym(RTLD_NEXT, "usleep");
75 raw_gettimeofday = dlsym(RTLD_NEXT, "gettimeofday");
77 raw_sem_open = dlsym(RTLD_NEXT, "sem_open");
78 raw_sem_init = dlsym(RTLD_NEXT, "sem_init");
79 raw_sem_wait = dlsym(RTLD_NEXT, "sem_wait");
80 raw_sem_post = dlsym(RTLD_NEXT, "sem_post");
81 raw_sem_destroy = dlsym(RTLD_NEXT, "sem_destroy");
82 raw_sem_trywait = dlsym(RTLD_NEXT, "sem_trywait");
83 raw_sem_timedwait = dlsym(RTLD_NEXT, "sem_timedwait");
86 static int sthread_inside_simgrid = 1;
87 void sthread_enable(void)
88 { // Start intercepting all pthread calls
89 sthread_inside_simgrid = 0;
91 void sthread_disable(void)
92 { // Stop intercepting all pthread calls
93 sthread_inside_simgrid = 1;
96 #define _STHREAD_CONCAT(a, b) a##b
97 #define intercepted_pthcall(name, raw_params, call_params, sim_params) \
98 int _STHREAD_CONCAT(pthread_, name) raw_params \
100 if (_STHREAD_CONCAT(raw_pthread_, name) == NULL) \
101 intercepter_init(); \
102 if (sthread_inside_simgrid) \
103 return _STHREAD_CONCAT(raw_pthread_, name) call_params; \
106 int res = _STHREAD_CONCAT(sthread_, name) sim_params; \
111 intercepted_pthcall(mutexattr_init, (pthread_mutexattr_t * attr), (attr), ((sthread_mutexattr_t*)attr));
112 intercepted_pthcall(mutexattr_settype, (pthread_mutexattr_t * attr, int type), (attr, type),
113 ((sthread_mutexattr_t*)attr, type));
114 intercepted_pthcall(mutexattr_gettype, (const pthread_mutexattr_t* restrict attr, int* type), (attr, type),
115 ((sthread_mutexattr_t*)attr, type));
116 intercepted_pthcall(mutexattr_setrobust, (pthread_mutexattr_t* restrict attr, int robustness), (attr, robustness),
117 ((sthread_mutexattr_t*)attr, robustness));
118 intercepted_pthcall(mutexattr_getrobust, (const pthread_mutexattr_t* restrict attr, int* restrict robustness),
119 (attr, robustness), ((sthread_mutexattr_t*)attr, robustness));
121 intercepted_pthcall(create, (pthread_t * thread, const pthread_attr_t* attr, void* (*start_routine)(void*), void* arg),
122 (thread, attr, start_routine, arg), ((sthread_t*)thread, attr, start_routine, arg));
123 intercepted_pthcall(join, (pthread_t thread, void** retval), (thread, retval), ((sthread_t)thread, retval));
125 intercepted_pthcall(mutex_init, (pthread_mutex_t * mutex, const pthread_mutexattr_t* attr), (mutex, attr),
126 ((sthread_mutex_t*)mutex, (sthread_mutexattr_t*)attr));
127 intercepted_pthcall(mutex_lock, (pthread_mutex_t * mutex), (mutex), ((sthread_mutex_t*)mutex));
128 intercepted_pthcall(mutex_trylock, (pthread_mutex_t * mutex), (mutex), ((sthread_mutex_t*)mutex));
129 intercepted_pthcall(mutex_unlock, (pthread_mutex_t * mutex), (mutex), ((sthread_mutex_t*)mutex));
130 intercepted_pthcall(mutex_destroy, (pthread_mutex_t * mutex), (mutex), ((sthread_mutex_t*)mutex));
132 intercepted_pthcall(barrier_init, (pthread_barrier_t * barrier, const pthread_barrierattr_t* attr, unsigned count),
133 (barrier, attr, count), ((sthread_barrier_t*)barrier, (const sthread_barrierattr_t*)attr, count));
134 intercepted_pthcall(barrier_wait, (pthread_barrier_t* barrier),( barrier),((sthread_barrier_t*) barrier));
135 intercepted_pthcall(barrier_destroy, (pthread_barrier_t* barrier),( barrier),((sthread_barrier_t*) barrier));
137 #define intercepted_call(rettype, name, raw_params, call_params, sim_params) \
138 rettype name raw_params \
140 if (_STHREAD_CONCAT(raw_, name) == NULL) \
141 intercepter_init(); \
142 if (sthread_inside_simgrid) \
143 return _STHREAD_CONCAT(raw_, name) call_params; \
146 rettype res = _STHREAD_CONCAT(sthread_, name) sim_params; \
151 intercepted_call(int, sem_init, (sem_t * sem, int pshared, unsigned int value), (sem, pshared, value),
152 ((sthread_sem_t*)sem, pshared, value));
153 intercepted_call(int, sem_destroy, (sem_t * sem), (sem), ((sthread_sem_t*)sem));
154 intercepted_call(int, sem_post, (sem_t * sem), (sem), ((sthread_sem_t*)sem));
155 intercepted_call(int, sem_wait, (sem_t * sem), (sem), ((sthread_sem_t*)sem));
156 intercepted_call(int, sem_trywait, (sem_t * sem), (sem), ((sthread_sem_t*)sem));
157 intercepted_call(int, sem_timedwait, (sem_t * sem, const struct timespec* abs_timeout), (sem, abs_timeout),
158 ((sthread_sem_t*)sem, abs_timeout));
160 /* Glibc < 2.31 uses type "struct timezone *" for the second parameter of gettimeofday.
161 Other implementations use "void *" instead. */
163 #if !__GLIBC_PREREQ(2, 31)
164 #define TIMEZONE_TYPE struct timezone
167 #ifndef TIMEZONE_TYPE
168 #define TIMEZONE_TYPE void
170 intercepted_call(int, gettimeofday, (struct timeval * tv, XBT_ATTRIB_UNUSED TIMEZONE_TYPE* tz), (tv, tz), (tv));
171 intercepted_call(unsigned int, sleep, (unsigned int seconds), (seconds), (seconds));
172 intercepted_call(int, usleep, (useconds_t usec), (usec), (((double)usec) / 1000000.));
175 int pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *cond_attr) {
176 *cond = sg_cond_init();
180 int pthread_cond_signal(pthread_cond_t *cond) {
181 sg_cond_notify_one(*cond);
185 int pthread_cond_broadcast(pthread_cond_t *cond) {
186 sg_cond_notify_all(*cond);
190 int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) {
191 sg_cond_wait(*cond, *mutex);
195 int pthread_cond_destroy(pthread_cond_t *cond) {
196 sg_cond_destroy(*cond);
201 /* Trampoline for the real main() */
202 static int (*raw_main)(int, char**, char**);
204 /* Our fake main() that gets called by __libc_start_main() */
205 static int main_hook(int argc, char** argv, char** envp)
207 return sthread_main(argc, argv, envp, raw_main);
210 /* Wrapper for __libc_start_main() that replaces the real main function with our hooked version. */
211 int __libc_start_main(int (*main)(int, char**, char**), int argc, char** argv, int (*init)(int, char**, char**),
212 void (*fini)(void), void (*rtld_fini)(void), void* stack_end);
214 int __libc_start_main(int (*main)(int, char**, char**), int argc, char** argv, int (*init)(int, char**, char**),
215 void (*fini)(void), void (*rtld_fini)(void), void* stack_end)
217 /* Save the real main function address */
220 /* Find the real __libc_start_main()... */
221 typeof(&__libc_start_main) orig = dlsym(RTLD_NEXT, "__libc_start_main");
222 /* ... and call it with our custom main function */
224 /* ... unless valgrind is used, and this instance is not the target program (but the valgrind launcher) */
225 if (getenv("VALGRIND_LIB") && !RUNNING_ON_VALGRIND)
226 return orig(raw_main, argc, argv, init, fini, rtld_fini, stack_end);
228 return orig(main_hook, argc, argv, init, fini, rtld_fini, stack_end);