-/* 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
* under the terms of the license (GNU LGPL) which comes with this package. */
+#include <stdlib.h>
+
#include "smx_private.h"
#include "xbt/heap.h"
#include "xbt/sysdep.h"
#include "xbt/str.h"
#include "xbt/ex.h" /* ex_backtrace_display */
#include "mc/mc.h"
+#include "mc/mc_replay.h"
#include "simgrid/sg_config.h"
+#ifdef HAVE_MC
+#include "mc/mc_private.h"
+#include "mc/mc_protocol.h"
+#include "mc/mc_client.h"
+#endif
+#include "mc/mc_record.h"
+
+#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)");
smx_global_t simix_global = NULL;
static xbt_heap_t simix_timers = NULL;
-static void* SIMIX_action_mallocator_new_f(void);
-static void SIMIX_action_mallocator_free_f(void* action);
-static void SIMIX_action_mallocator_reset_f(void* action);
-
-static void SIMIX_clean(void);
+static void* SIMIX_synchro_mallocator_new_f(void);
+static void SIMIX_synchro_mallocator_free_f(void* synchro);
+static void SIMIX_synchro_mallocator_reset_f(void* synchro);
/* 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)
simix_global->create_process_function = SIMIX_process_create;
simix_global->kill_process_function = SIMIX_process_kill;
simix_global->cleanup_process_function = SIMIX_process_cleanup;
- simix_global->action_mallocator = xbt_mallocator_new(65536,
- SIMIX_action_mallocator_new_f, SIMIX_action_mallocator_free_f,
- SIMIX_action_mallocator_reset_f);
+ simix_global->synchro_mallocator = xbt_mallocator_new(65536,
+ SIMIX_synchro_mallocator_new_f, SIMIX_synchro_mallocator_free_f,
+ SIMIX_synchro_mallocator_reset_f);
simix_global->autorestart = SIMIX_host_restart_processes;
+ simix_global->mutex = xbt_os_mutex_init();
surf_init(argc, argv); /* Initialize SURF structures */
SIMIX_context_mod_init();
/* 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);
simix_timers = xbt_heap_new(8, &free);
}
- SIMIX_HOST_LEVEL = xbt_lib_add_level(host_lib,SIMIX_host_destroy);
+ SIMIX_STORAGE_LEVEL = xbt_lib_add_level(storage_lib, SIMIX_storage_destroy);
if (sg_cfg_get_boolean("clean_atexit"))
atexit(SIMIX_clean);
+#ifdef HAVE_MC
+ // The communication initialization is done ASAP.
+ // We need to communicate initialization of the different layers to the model-checker.
+ if (mc_mode == MC_MODE_NONE) {
+ if (getenv(MC_ENV_SOCKET_FD)) {
+ mc_mode = MC_MODE_CLIENT;
+ MC_client_init();
+ MC_client_hello();
+ MC_client_handle_messages();
+ }
+ }
+#endif
+
if (_sg_cfg_exit_asap)
exit(0);
}
*
* 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
-
- /* Kill everyone (except maestro) */
+ if (cleaned) return; // to avoid double cleaning by java and C
+ cleaned = 1;
+ XBT_DEBUG("SIMIX_clean called. Simulation's over.");
+ if (!xbt_dynar_is_empty(simix_global->process_to_run) && SIMIX_get_clock() == 0.0) {
+ XBT_CRITICAL(" ");
+ XBT_CRITICAL("The time is still 0, and you still have processes ready to run.");
+ XBT_CRITICAL("It seems that you forgot to run the simulation that you setup.");
+ xbt_die("Bailing out to avoid that stop-before-start madness. Please fix your code.");
+ }
+ /* Kill all processes (but maestro) */
SIMIX_process_killall(simix_global->maestro_process, 1);
/* Exit the SIMIX network module */
simix_global->process_to_destroy = NULL;
xbt_dict_free(&(simix_global->registered_functions));
+ xbt_os_mutex_destroy(simix_global->mutex);
+ simix_global->mutex = NULL;
+
/* Let's free maestro now */
SIMIX_context_free(simix_global->maestro_process->context);
xbt_free(simix_global->maestro_process->running_ctx);
#ifdef TIME_BENCH_AMDAHL
xbt_os_cputimer_stop(simix_global->timer_seq);
- XBT_INFO("Amdahl timing informations. Sequential time: %lf; Parallel time: %lf",
+ XBT_INFO("Amdahl timing informations. Sequential time: %f; Parallel time: %f",
xbt_os_timer_elapsed(simix_global->timer_seq),
xbt_os_timer_elapsed(simix_global->timer_par));
xbt_os_timer_free(simix_global->timer_seq);
xbt_os_timer_free(simix_global->timer_par);
#endif
- xbt_mallocator_free(simix_global->action_mallocator);
+ xbt_mallocator_free(simix_global->synchro_mallocator);
xbt_free(simix_global);
simix_global = NULL;
*/
XBT_INLINE double SIMIX_get_clock(void)
{
- if(MC_is_active()){
+ if(MC_is_active() || MC_record_replay_is_active()){
return MC_process_clock_get(SIMIX_process_self());
}else{
return surf_get_clock();
*/
void SIMIX_run(void)
{
+ if(MC_record_path) {
+ MC_record_replay_init();
+ MC_record_replay_from_string(MC_record_path);
+ return;
+ }
+
double time = 0;
smx_process_t process;
- xbt_swag_t set;
surf_action_t action;
smx_timer_t timer;
surf_model_t model;
xbt_os_cputimer_resume(simix_global->timer_seq);
#endif
- /* Move all killing processes to the end of the list, because killing a process that have an ongoing simcall is a bad idea */
+ /* Move all killer processes to the end of the list, because killing a process that have an ongoing simcall is a bad idea */
xbt_dynar_three_way_partition(simix_global->process_that_ran, process_syscall_color);
/* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round */
* - because the communication failed or were canceled after startup. In this case, it's called from the function
* we are in, by the chunk:
* set = model->states.failed_action_set;
- * while ((action = xbt_swag_extract(set)))
- * SIMIX_simcall_post((smx_action_t) action->data);
+ * while ((synchro = xbt_swag_extract(set)))
+ * SIMIX_simcall_post((smx_synchro_t) synchro->data);
* This order is also fixed because it depends of the order in which the surf actions were
* added to the system, and only maestro can add stuff this way, through simcalls.
- * We thus use the inductive hypothesis once again to conclude that the order in which actions are
+ * We thus use the inductive hypothesis once again to conclude that the order in which synchros are
* poped out of the swag does not depend on the user code's execution order.
- * - because the communication terminated. In this case, actions are served in the order given by
+ * - because the communication terminated. In this case, synchros are served in the order given by
* set = model->states.done_action_set;
- * while ((action = xbt_swag_extract(set)))
- * SIMIX_simcall_post((smx_action_t) action->data);
+ * while ((synchro = xbt_swag_extract(set)))
+ * SIMIX_simcall_post((smx_synchro_t) synchro->data);
* and the argument is very similar to the previous one.
* So, in any case, the orders of calls to SIMIX_comm_finish() do not depend on the order in which user processes are executed.
* So, in any cases, the orders of processes within process_to_run do not depend on the order in which user processes were executed previously.
xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
if (process->simcall.call != SIMCALL_NONE) {
- SIMIX_simcall_pre(&process->simcall, 0);
+ SIMIX_simcall_handle(&process->simcall, 0);
+ }
+ }
+ /* Wake up all processes waiting for a Surf action to finish */
+ xbt_dynar_foreach(model_list, iter, model) {
+ XBT_DEBUG("Handling process whose action failed");
+ while ((action = surf_model_extract_failed_action_set(model))) {
+ XBT_DEBUG(" Handling Action %p",action);
+ SIMIX_simcall_exit((smx_synchro_t) surf_action_get_data(action));
+ }
+ XBT_DEBUG("Handling process whose action terminated normally");
+ while ((action = surf_model_extract_done_action_set(model))) {
+ XBT_DEBUG(" Handling Action %p",action);
+ if (surf_action_get_data(action) == NULL)
+ XBT_DEBUG("probably vcpu's action %p, skip", action);
+ else
+ SIMIX_simcall_exit((smx_synchro_t) surf_action_get_data(action));
}
}
}
time = SIMIX_timer_next();
- if (time != -1.0 || xbt_swag_size(simix_global->process_list) != 0)
+ if (time != -1.0 || xbt_swag_size(simix_global->process_list) != 0) {
+ XBT_DEBUG("Calling surf_solve");
time = surf_solve(time);
-
+ XBT_DEBUG("Moving time ahead : %g", time);
+ }
/* Notify all the hosts that have failed */
/* FIXME: iterate through the list of failed host and mark each of them */
/* as failed. On each host, signal all the running processes with host_fail */
/* 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);
xbt_free(timer);
}
+
/* Wake up all processes waiting for a Surf action to finish */
xbt_dynar_foreach(model_list, iter, model) {
- set = model->states.failed_action_set;
- while ((action = xbt_swag_extract(set)))
- SIMIX_simcall_post((smx_action_t) action->data);
- set = model->states.done_action_set;
- while ((action = xbt_swag_extract(set)))
- SIMIX_simcall_post((smx_action_t) action->data);
+ XBT_DEBUG("Handling process whose action failed");
+ while ((action = surf_model_extract_failed_action_set(model))) {
+ XBT_DEBUG(" Handling Action %p",action);
+ SIMIX_simcall_exit((smx_synchro_t) surf_action_get_data(action));
+ }
+ XBT_DEBUG("Handling process whose action terminated normally");
+ while ((action = surf_model_extract_done_action_set(model))) {
+ XBT_DEBUG(" Handling Action %p",action);
+ if (surf_action_get_data(action) == NULL)
+ XBT_DEBUG("probably vcpu's action %p, skip", action);
+ else
+ SIMIX_simcall_exit((smx_synchro_t) surf_action_get_data(action));
+ }
}
/* Autorestart all process */
char *hostname = NULL;
xbt_dynar_foreach(host_that_restart,iter,hostname) {
XBT_INFO("Restart processes on host: %s",hostname);
- SIMIX_host_autorestart(SIMIX_host_get_by_name(hostname));
+ SIMIX_host_autorestart(sg_host_by_name(hostname));
}
xbt_dynar_reset(host_that_restart);
}
/* Clean processes to destroy */
SIMIX_process_empty_trash();
+
+ XBT_DEBUG("### time %f, empty %d", time, xbt_dynar_is_empty(simix_global->process_to_run));
+
} while (time != -1.0 || !xbt_dynar_is_empty(simix_global->process_to_run));
if (xbt_swag_size(simix_global->process_list) != 0) {
-#ifdef HAVE_TRACING
- TRACE_end();
-#endif
+ TRACE_end();
XBT_CRITICAL("Oops ! Deadlock or code not perfectly clean.");
SIMIX_display_process_status();
* \param arg Parameters of the function
*
*/
-XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
+XBT_INLINE smx_timer_t SIMIX_timer_set(double date, void *function, void *arg)
{
smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
timer->func = function;
timer->args = arg;
xbt_heap_push(simix_timers, timer, date);
+ return timer;
+}
+/** @brief cancels a timer that was added earlier */
+XBT_INLINE void SIMIX_timer_remove(smx_timer_t timer) {
+ xbt_heap_rm_elm(simix_timers, timer, timer->date);
+}
+
+/** @brief Returns the date at which the timer will trigger (or 0 if NULL timer) */
+XBT_INLINE double SIMIX_timer_get_date(smx_timer_t timer) {
+ return timer?timer->date:0;
}
/**
("Legend of the following listing: \"Process <pid> (<name>@<host>): <status>\"");
xbt_swag_foreach(process, simix_global->process_list) {
- if (process->waiting_action) {
+ if (process->waiting_synchro) {
- const char* action_description = "unknown";
- switch (process->waiting_action->type) {
+ const char* synchro_description = "unknown";
+ switch (process->waiting_synchro->type) {
- case SIMIX_ACTION_EXECUTE:
- action_description = "execution";
+ case SIMIX_SYNC_EXECUTE:
+ synchro_description = "execution";
break;
- case SIMIX_ACTION_PARALLEL_EXECUTE:
- action_description = "parallel execution";
+ case SIMIX_SYNC_PARALLEL_EXECUTE:
+ synchro_description = "parallel execution";
break;
- case SIMIX_ACTION_COMMUNICATE:
- action_description = "communication";
+ case SIMIX_SYNC_COMMUNICATE:
+ synchro_description = "communication";
break;
- case SIMIX_ACTION_SLEEP:
- action_description = "sleeping";
+ case SIMIX_SYNC_SLEEP:
+ synchro_description = "sleeping";
break;
- case SIMIX_ACTION_SYNCHRO:
- action_description = "synchronization";
+ case SIMIX_SYNC_JOIN:
+ synchro_description = "joining";
break;
- case SIMIX_ACTION_IO:
- action_description = "I/O";
+ case SIMIX_SYNC_SYNCHRO:
+ synchro_description = "synchronization";
break;
- /* **************************************/
- /* TUTORIAL: New API */
- case SIMIX_ACTION_NEW_API:
- action_description = "NEW API";
- /* **************************************/
+ case SIMIX_SYNC_IO:
+ synchro_description = "I/O";
break;
}
- XBT_INFO("Process %lu (%s@%s): waiting for %s action %p (%s) in state %d to finish",
- process->pid, process->name, sg_host_name(process->smx_host),
- action_description, process->waiting_action,
- process->waiting_action->name, (int)process->waiting_action->state);
+ XBT_INFO("Process %lu (%s@%s): waiting for %s synchro %p (%s) in state %d to finish",
+ process->pid, process->name, sg_host_name(process->host),
+ synchro_description, process->waiting_synchro,
+ process->waiting_synchro->name, (int)process->waiting_synchro->state);
}
else {
- XBT_INFO("Process %lu (%s@%s)", process->pid, process->name, sg_host_name(process->smx_host));
+ XBT_INFO("Process %lu (%s@%s)", process->pid, process->name, sg_host_name(process->host));
}
}
}
-static void* SIMIX_action_mallocator_new_f(void) {
- smx_action_t action = xbt_new(s_smx_action_t, 1);
- action->simcalls = xbt_fifo_new();
- return action;
+static void* SIMIX_synchro_mallocator_new_f(void) {
+ smx_synchro_t synchro = xbt_new(s_smx_synchro_t, 1);
+ synchro->simcalls = xbt_fifo_new();
+ return synchro;
}
-static void SIMIX_action_mallocator_free_f(void* action) {
- xbt_fifo_free(((smx_action_t) action)->simcalls);
- xbt_free(action);
+static void SIMIX_synchro_mallocator_free_f(void* synchro) {
+ xbt_fifo_free(((smx_synchro_t) synchro)->simcalls);
+ xbt_free(synchro);
}
-static void SIMIX_action_mallocator_reset_f(void* action) {
+static void SIMIX_synchro_mallocator_reset_f(void* synchro) {
// we also recycle the simcall list
- xbt_fifo_t fifo = ((smx_action_t) action)->simcalls;
+ xbt_fifo_t fifo = ((smx_synchro_t) synchro)->simcalls;
xbt_fifo_reset(fifo);
- memset(action, 0, sizeof(s_smx_action_t));
- ((smx_action_t) action)->simcalls = fifo;
+ memset(synchro, 0, sizeof(s_smx_synchro_t));
+ ((smx_synchro_t) synchro)->simcalls = fifo;
}
-xbt_dict_t SIMIX_pre_asr_get_properties(smx_simcall_t simcall, const char *name){
+xbt_dict_t simcall_HANDLER_asr_get_properties(smx_simcall_t simcall, const char *name){
return SIMIX_asr_get_properties(name);
}
xbt_dict_t SIMIX_asr_get_properties(const char *name)
{
return xbt_lib_get_or_null(as_router_lib, name, ROUTING_PROP_ASR_LEVEL);
}
-
