# include <valgrind/valgrind.h>
#endif
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_context, simix,
- "Context switching mechanism");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_context, simix, "Context switching mechanism");
char* smx_context_factory_name = NULL; /* factory name specified by --cfg=contexts/factory:value */
int smx_context_stack_size;
#else
XBT_ERROR(" (boost was disabled at compilation time on this machine -- check configure logs for details. Did you install the libboost-context-dev package?)");
#endif
- XBT_ERROR(" thread: slow portability layer using system threads (pthreads on UNIX, CreateThread() on windows)");
+ XBT_ERROR(" thread: slow portability layer using pthreads as provided by gcc");
xbt_die("Please use a valid factory.");
}
}
{
delete simix_global->context_factory;
simix_global->context_factory = nullptr;
- xbt_dict_remove((xbt_dict_t) _sg_cfg_set,"contexts/factory");
}
void *SIMIX_context_stack_new(void)
if (smx_context_guard_size > 0 && !MC_is_active()) {
-#if defined(_XBT_WIN32) || (PTH_STACKGROWTH != -1)
+#if !defined(PTH_STACKGROWTH) || (PTH_STACKGROWTH != -1)
static int warned_once = 0;
if (!warned_once) {
- XBT_WARN("Stack overflow protection is known to be broken on your system. Either you're on Windows or PTH_STACKGROWTH != -1 (current value is %d).",
- PTH_STACKGROWTH);
+ XBT_WARN("Stack overflow protection is known to be broken on your system. Either stack grows upwards, or it was not even tested properly.");
warned_once = 1;
}
#endif
char *alloc = (char*)xbt_malloc0(size + xbt_pagesize);
stack = alloc - ((uintptr_t)alloc & (xbt_pagesize - 1)) + xbt_pagesize;
*((void **)stack - 1) = alloc;
-#elif !defined(_XBT_WIN32)
+#elif !defined(_WIN32)
if (posix_memalign(&stack, xbt_pagesize, size) != 0)
xbt_die("Failed to allocate stack.");
#else
stack = _aligned_malloc(size, xbt_pagesize);
#endif
-#ifndef _XBT_WIN32
+#ifndef _WIN32
if (mprotect(stack, smx_context_guard_size, PROT_NONE) == -1) {
xbt_die("Failed to protect stack: %s", strerror(errno));
/* This is fatal. We are going to fail at some point when
}
#ifdef HAVE_VALGRIND_VALGRIND_H
- unsigned int valgrind_stack_id =
- VALGRIND_STACK_REGISTER(stack, (char *)stack + smx_context_stack_size);
- memcpy((char *)stack + smx_context_usable_stack_size, &valgrind_stack_id,
- sizeof valgrind_stack_id);
+ unsigned int valgrind_stack_id = VALGRIND_STACK_REGISTER(stack, (char *)stack + smx_context_stack_size);
+ memcpy((char *)stack + smx_context_usable_stack_size, &valgrind_stack_id, sizeof valgrind_stack_id);
#endif
return stack;
#ifdef HAVE_VALGRIND_VALGRIND_H
unsigned int valgrind_stack_id;
- memcpy(&valgrind_stack_id, (char *)stack + smx_context_usable_stack_size,
- sizeof valgrind_stack_id);
+ memcpy(&valgrind_stack_id, (char *)stack + smx_context_usable_stack_size, sizeof valgrind_stack_id);
VALGRIND_STACK_DEREGISTER(valgrind_stack_id);
#endif
-#ifndef WIN32
+#ifndef _WIN32
if (smx_context_guard_size > 0 && !MC_is_active()) {
stack = (char *)stack - smx_context_guard_size;
- if (mprotect(stack, smx_context_guard_size,
- PROT_READ | PROT_WRITE) == -1) {
+ if (mprotect(stack, smx_context_guard_size, PROT_READ | PROT_WRITE) == -1) {
XBT_WARN("Failed to remove page protection: %s", strerror(errno));
/* try to pursue anyway */
}
stack = *((void **)stack - 1);
#endif
}
-#endif
+#endif /* not windows */
xbt_free(stack);
}
-/**
- * \brief Returns whether some parallel threads are used
- * for the user contexts.
- * \return 1 if parallelism is used
- */
+/** @brief Returns whether some parallel threads are used for the user contexts. */
int SIMIX_context_is_parallel(void) {
return smx_parallel_contexts > 1;
}
nb_threads = xbt_os_get_numcores();
XBT_INFO("Auto-setting contexts/nthreads to %d",nb_threads);
}
-
- if (nb_threads > 1) {
#ifndef HAVE_THREAD_CONTEXTS
- THROWF(arg_error, 0, "The thread factory cannot be run in parallel");
+ xbt_assert(nb_threads == 1, "Parallel runs are impossible when the pthreads are missing.");
#endif
- }
smx_parallel_contexts = nb_threads;
}