-/* Copyright (c) 2007-2013. The SimGrid Team.
+/* Copyright (c) 2007-2014. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#include "mc/mc.h"
#include "simgrid/sg_config.h"
+#ifdef HAVE_MC
+#include "mc/mc_private.h"
+#endif
+
+#ifdef HAVE_SMPI
+#include "smpi/private.h"
+#endif
+
XBT_LOG_NEW_CATEGORY(simix, "All SIMIX categories");
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
"Logging specific to SIMIX (kernel)");
static void SIMIX_action_mallocator_free_f(void* action);
static void SIMIX_action_mallocator_reset_f(void* action);
-static void SIMIX_clean(void);
-
/* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
#include <signal.h>
static void _XBT_CALL inthandler(int ignored)
{
if ( _sg_do_verbose_exit ) {
- XBT_INFO("CTRL-C pressed. Displaying status and bailing out");
+ XBT_INFO("CTRL-C pressed. The current status will be displayed before exit (disable that behavior with option 'verbose-exit').");
SIMIX_display_process_status();
}
else {
- XBT_INFO("CTRL-C pressed. bailing out without displaying because verbose-exit is disabled");
+ XBT_INFO("CTRL-C pressed, exiting. Hiding the current process status since 'verbose-exit' is set to false.");
}
exit(1);
}
+#ifndef WIN32
+static void _XBT_CALL segvhandler(int signum, siginfo_t *siginfo, void *context)
+{
+ if (siginfo->si_signo == SIGSEGV && siginfo->si_code == SEGV_ACCERR) {
+ fprintf(stderr,
+ "Access violation detected.\n"
+ "This can result from a programming error in your code or, although less likely,\n"
+ "from a bug in SimGrid itself. This can also be the sign of a bug in the OS or\n"
+ "in third-party libraries. Failing hardware can sometimes generate such errors\n"
+ "too.\n"
+ "Finally, if nothing of the above applies, this can result from a stack overflow.\n"
+ "Try to increase stack size with --cfg=contexts/stack_size (current size is %d KiB).\n",
+ smx_context_stack_size / 1024);
+ if (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug)) {
+ fprintf(stderr,
+ "siginfo = {si_signo = %d, si_errno = %d, si_code = %d, si_addr = %p}\n",
+ siginfo->si_signo, siginfo->si_errno, siginfo->si_code, siginfo->si_addr);
+ }
+ } else if (siginfo->si_signo == SIGSEGV) {
+ fprintf(stderr, "Segmentation fault.\n");
+#ifdef HAVE_SMPI
+ if (smpi_enabled() && !smpi_privatize_global_variables) {
+ fprintf(stderr,
+ "Try to enable SMPI variable privatization with --cfg=smpi/privatize_global_variables:yes.\n");
+ }
+#endif
+ }
+#ifdef HAVE_MC
+ if (MC_is_active()) {
+ if (mc_stack) {
+ MC_dump_stack_safety(mc_stack);
+ }
+ MC_print_statistics(mc_stats);
+ }
+#endif
+ raise(signum);
+}
+
+char sigsegv_stack[SIGSTKSZ]; /* alternate stack for SIGSEGV handler */
+
+/**
+ * Install signal handler for SIGSEGV. Check that nobody has already installed
+ * its own handler. For example, the Java VM does this.
+ */
+static void install_segvhandler(void)
+{
+ stack_t stack, old_stack;
+ stack.ss_sp = sigsegv_stack;
+ stack.ss_size = sizeof sigsegv_stack;
+ stack.ss_flags = 0;
+
+ if (sigaltstack(&stack, &old_stack) == -1) {
+ XBT_WARN("Failed to register alternate signal stack: %s",
+ strerror(errno));
+ return;
+ }
+ if (!(old_stack.ss_flags & SS_DISABLE)) {
+ XBT_DEBUG("An alternate stack was already installed (sp=%p, size=%zd, flags=%x). Restore it.",
+ old_stack.ss_sp, old_stack.ss_size, old_stack.ss_flags);
+ sigaltstack(&old_stack, NULL);
+ }
+
+ struct sigaction action, old_action;
+ action.sa_sigaction = segvhandler;
+ action.sa_flags = SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
+ sigemptyset(&action.sa_mask);
+
+ if (sigaction(SIGSEGV, &action, &old_action) == -1) {
+ XBT_WARN("Failed to register signal handler for SIGSEGV: %s",
+ strerror(errno));
+ return;
+ }
+ if ((old_action.sa_flags & SA_SIGINFO) || old_action.sa_handler != SIG_DFL) {
+ XBT_DEBUG("A signal handler was already installed for SIGSEGV (%p). Restore it.",
+ (old_action.sa_flags & SA_SIGINFO) ?
+ (void*)old_action.sa_sigaction : (void*)old_action.sa_handler);
+ sigaction(SIGSEGV, &old_action, NULL);
+ }
+}
+
+#endif
/********************************* SIMIX **************************************/
XBT_INLINE double SIMIX_timer_next(void)
/* Prepare to display some more info when dying on Ctrl-C pressing */
signal(SIGINT, inthandler);
+#ifndef WIN32
+ /* Install SEGV handler */
+ install_segvhandler();
+#endif
/* register a function to be called by SURF after the environment creation */
sg_platf_init();
sg_platf_postparse_add_cb(SIMIX_post_create_environment);
*
* This functions remove the memory used by SIMIX
*/
-static void SIMIX_clean(void)
+void SIMIX_clean(void)
{
+ static int cleaned = 0;
#ifdef TIME_BENCH_PER_SR
smx_ctx_raw_new_sr();
#endif
-
+ if (cleaned) return; // to avoid double cleaning by java and C
+ cleaned = 1;
/* Kill everyone (except maestro) */
SIMIX_process_killall(simix_global->maestro_process, 1);
xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
if (process->simcall.call != SIMCALL_NONE) {
- SIMIX_simcall_pre(&process->simcall, 0);
+ SIMIX_simcall_enter(&process->simcall, 0);
}
}
}
/* Handle any pending timer */
while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
//FIXME: make the timers being real callbacks
- // (i.e. provide dispatchers that read and expand the args)
+ // (i.e. provide dispatchers that read and expand the args)
timer = xbt_heap_pop(simix_timers);
if (timer->func)
((void (*)(void*))timer->func)(timer->args);
/* Wake up all processes waiting for a Surf action to finish */
xbt_dynar_foreach(model_list, iter, model) {
while ((action = surf_model_extract_failed_action_set(model)))
-
- SIMIX_simcall_post((smx_action_t) surf_action_get_data(action));
+ SIMIX_simcall_exit((smx_action_t) surf_action_get_data(action));
while ((action = surf_model_extract_done_action_set(model)))
if (surf_action_get_data(action) == NULL)
XBT_DEBUG("probably vcpu's action %p, skip", action);
else
- SIMIX_simcall_post((smx_action_t) surf_action_get_data(action));
+ SIMIX_simcall_exit((smx_action_t) surf_action_get_data(action));
}
/* Autorestart all process */
XBT_DEBUG("### time %f, empty %d", time, xbt_dynar_is_empty(simix_global->process_to_run));
- // !(time == -1.0 && xbt_dynar_is_empty())
-
} while (time != -1.0 || !xbt_dynar_is_empty(simix_global->process_to_run));
action_description = "sleeping";
break;
+ case SIMIX_ACTION_JOIN:
+ action_description = "joining";
+ break;
+
case SIMIX_ACTION_SYNCHRO:
action_description = "synchronization";
break;
