+/* Copyright (c) 2002-2023. The SimGrid Team. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
/* SimGrid's pthread interposer. Actual implementation of the symbols (see the comment in sthread.h) */
#include "smpi/smpi.h"
+#include "xbt/asserts.h"
+#include "xbt/ex.h"
+#include "xbt/log.h"
+#include "xbt/string.hpp"
#include <simgrid/actor.h>
#include <simgrid/s4u/Actor.hpp>
#include <simgrid/s4u/Engine.hpp>
#include <simgrid/s4u/Mutex.hpp>
#include <simgrid/s4u/NetZone.hpp>
+#include <simgrid/s4u/Semaphore.hpp>
#include <xbt/base.h>
#include <xbt/sysdep.h>
#include <sstream>
#include <stdio.h>
#include <stdlib.h>
+#include <string_view>
#include <thread>
XBT_LOG_NEW_DEFAULT_CATEGORY(sthread, "pthread intercepter");
{
/* Do not intercept the main when run from SMPI: it will initialize the simulation properly */
for (int i = 0; envp[i] != nullptr; i++)
- if (strncmp(envp[i], "SMPI_GLOBAL_SIZE", strlen("SMPI_GLOBAL_SIZE")) == 0)
+ if (std::string_view(envp[i]).rfind("SMPI_GLOBAL_SIZE", 0) == 0) {
+ printf("sthread refuses to intercept the SMPI application %s directly, as its interception is done otherwise.\n",
+ argv[0]);
return raw_main(argc, argv, envp);
+ }
- /* If not in SMPI, the old main becomes an actor in a newly created simulation */
- std::ostringstream id;
- id << std::this_thread::get_id();
+ /* Do not intercept valgrind step 1 */
+ if (not strcmp(argv[0], "/usr/bin/valgrind.bin") || not strcmp(argv[0], "/bin/sh")) {
+ printf("sthread refuses to intercept the execution of %s. Running the application unmodified.\n", argv[0]);
+ fflush(stdout);
+ return raw_main(argc, argv, envp);
+ }
- XBT_DEBUG("sthread main() is starting in thread %s", id.str().c_str());
+ /* If not in SMPI, the old main becomes an actor in a newly created simulation */
+ printf("sthread is intercepting the execution of %s\n", argv[0]);
+ fflush(stdout);
sg4::Engine e(&argc, argv);
auto* zone = sg4::create_full_zone("world");
sthread_enable();
sg4::ActorPtr main_actor = sg4::Actor::create("main thread", lilibeth, raw_main, argc, argv, envp);
- XBT_INFO("Starting the simulation.");
sg4::Engine::get_instance()->run();
sthread_disable();
XBT_INFO("All threads exited. Terminating the simulation.");
s4u_Mutex* mutex;
};
-static void thread_create_wrapper(void* (*user_function)(void*), void* param)
-{
-#if HAVE_SMPI
- if (SMPI_is_inited())
- SMPI_thread_create();
-#endif
- sthread_enable();
- user_function(param);
- sthread_disable();
-}
-
int sthread_create(unsigned long int* thread, const void* /*pthread_attr_t* attr*/, void* (*start_routine)(void*),
void* arg)
{
static int TID = 0;
TID++;
XBT_VERB("Create thread %d", TID);
- int rank = 0;
+ std::string name = std::string("thread ") + std::to_string(TID);
#if HAVE_SMPI
- if (SMPI_is_inited())
+ if (SMPI_is_inited()) {
+ int rank = 0;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+ name = simgrid::xbt::string_printf("%d:%d", rank, TID);
+ }
+#endif
+ sg4::ActorPtr actor = sg4::Actor::create(
+ name, lilibeth,
+ [](auto* user_function, auto* param) {
+#if HAVE_SMPI
+ if (SMPI_is_inited())
+ SMPI_thread_create();
#endif
- std::string name = simgrid::xbt::string_printf("%d:%d", rank, TID);
- sg4::ActorPtr actor = sg4::Actor::create(name, lilibeth, thread_create_wrapper, start_routine, arg);
+ sthread_enable();
+ user_function(param);
+ sthread_disable();
+ },
+ start_routine, arg);
intrusive_ptr_add_ref(actor.get());
*thread = reinterpret_cast<unsigned long>(actor.get());
return 0;
}
-int sthread_mutex_init(sthread_mutex_t* mutex, const void* /*pthread_mutexattr_t* attr*/)
+int sthread_mutexattr_init(sthread_mutexattr_t* attr)
+{
+ memset(attr, 0, sizeof(*attr));
+ return 0;
+}
+int sthread_mutexattr_settype(sthread_mutexattr_t* attr, int type)
+{
+ switch (type) {
+ case PTHREAD_MUTEX_NORMAL:
+ xbt_assert(not attr->recursive, "S4U does not allow to remove the recursivness of a mutex.");
+ attr->recursive = 0;
+ break;
+ case PTHREAD_MUTEX_RECURSIVE:
+ attr->recursive = 1;
+ attr->errorcheck = 0; // reset
+ break;
+ case PTHREAD_MUTEX_ERRORCHECK:
+ attr->errorcheck = 1;
+ THROW_UNIMPLEMENTED;
+ break;
+ default:
+ THROW_IMPOSSIBLE;
+ }
+ return 0;
+}
+int sthread_mutexattr_gettype(const sthread_mutexattr_t* attr, int* type)
+{
+ if (attr->recursive)
+ *type = PTHREAD_MUTEX_RECURSIVE;
+ else if (attr->errorcheck)
+ *type = PTHREAD_MUTEX_ERRORCHECK;
+ else
+ *type = PTHREAD_MUTEX_NORMAL;
+ return 0;
+}
+int sthread_mutexattr_getrobust(const sthread_mutexattr_t* attr, int* robustness)
+{
+ *robustness = attr->robust;
+ return 0;
+}
+int sthread_mutexattr_setrobust(sthread_mutexattr_t* attr, int robustness)
+{
+ attr->robust = robustness;
+ if (robustness)
+ THROW_UNIMPLEMENTED;
+ return 0;
+}
+
+int sthread_mutex_init(sthread_mutex_t* mutex, const sthread_mutexattr_t* attr)
{
- auto m = sg4::Mutex::create();
+ auto m = sg4::Mutex::create(attr != nullptr && attr->recursive);
intrusive_ptr_add_ref(m.get());
mutex->mutex = m.get();
if (mutex->mutex == nullptr)
sthread_mutex_init(mutex, nullptr);
+ XBT_DEBUG("%s(%p)", __FUNCTION__, mutex);
static_cast<sg4::Mutex*>(mutex->mutex)->lock();
return 0;
}
if (mutex->mutex == nullptr)
sthread_mutex_init(mutex, nullptr);
- return static_cast<sg4::Mutex*>(mutex->mutex)->try_lock();
+ XBT_DEBUG("%s(%p)", __FUNCTION__, mutex);
+ if (static_cast<sg4::Mutex*>(mutex->mutex)->try_lock())
+ return 0;
+ return EBUSY;
}
int sthread_mutex_unlock(sthread_mutex_t* mutex)
if (mutex->mutex == nullptr)
sthread_mutex_init(mutex, nullptr);
+ XBT_DEBUG("%s(%p)", __FUNCTION__, mutex);
static_cast<sg4::Mutex*>(mutex->mutex)->unlock();
return 0;
}
if (mutex->mutex == nullptr)
sthread_mutex_init(mutex, nullptr);
+ XBT_DEBUG("%s(%p)", __FUNCTION__, mutex);
intrusive_ptr_release(static_cast<sg4::Mutex*>(mutex->mutex));
return 0;
}
+int sthread_sem_init(sthread_sem_t* sem, int /*pshared*/, unsigned int value)
+{
+ auto s = sg4::Semaphore::create(value);
+ intrusive_ptr_add_ref(s.get());
+
+ sem->sem = s.get();
+ return 0;
+}
+int sthread_sem_destroy(sthread_sem_t* sem)
+{
+ intrusive_ptr_release(static_cast<sg4::Semaphore*>(sem->sem));
+ return 0;
+}
+int sthread_sem_post(sthread_sem_t* sem)
+{
+ static_cast<sg4::Semaphore*>(sem->sem)->release();
+ return 0;
+}
+int sthread_sem_wait(sthread_sem_t* sem)
+{
+ static_cast<sg4::Semaphore*>(sem->sem)->acquire();
+ return 0;
+}
+int sthread_sem_trywait(sthread_sem_t* sem)
+{
+ auto* s = static_cast<sg4::Semaphore*>(sem->sem);
+ if (s->would_block()) {
+ errno = EAGAIN;
+ return -1;
+ }
+ s->acquire();
+ return 0;
+}
+int sthread_sem_timedwait(sthread_sem_t* sem, const struct timespec* abs_timeout)
+{
+ if (static_cast<sg4::Semaphore*>(sem->sem)->acquire_timeout(static_cast<double>(abs_timeout->tv_sec) +
+ static_cast<double>(abs_timeout->tv_nsec) / 1E9)) {
+ errno = ETIMEDOUT;
+ return -1;
+ }
+ return 0;
+}
int sthread_gettimeofday(struct timeval* tv)
{
double secs = trunc(now);
double usecs = (now - secs) * 1e6;
tv->tv_sec = static_cast<time_t>(secs);
- tv->tv_usec = static_cast<decltype(tv->tv_usec)>(usecs); // suseconds_t (or useconds_t on WIN32)
+ tv->tv_usec = static_cast<decltype(tv->tv_usec)>(usecs); // suseconds_t
}
return 0;
}
}
#if 0
-int sem_init(sem_t *sem, int pshared, unsigned int value) {
- int res;
-
- res=raw_sem_init(sem,pshared,value);
- return res;
-}
-
-int sem_wait(sem_t *sem) {
- int res;
-
- res = raw_sem_wait(sem);
- return res;
-}
-
-int sem_post(sem_t *sem) {
- return raw_sem_post(sem);
-}
-
int pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *cond_attr) {
*cond = sg_cond_init();
return 0;
