X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a89587facecc0a7ac72c72243fedf75638374d2a..20c4a4134847860ac7093fa36623e47b35888558:/src/simix/smx_global.c diff --git a/src/simix/smx_global.c b/src/simix/smx_global.c index bfed0bafe9..0404d17deb 100644 --- a/src/simix/smx_global.c +++ b/src/simix/smx_global.c @@ -1,9 +1,16 @@ -/* Copyright (c) 2007-2013. The SimGrid Team. +/* Copyright (c) 2007-2015. 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 +#include "src/portable.h" +#ifdef HAVE_SYS_PTRACE_H +# include +# include +#endif + #include "smx_private.h" #include "xbt/heap.h" #include "xbt/sysdep.h" @@ -11,8 +18,26 @@ #include "xbt/str.h" #include "xbt/ex.h" /* ex_backtrace_display */ #include "mc/mc.h" +#include "src/mc/mc_replay.h" #include "simgrid/sg_config.h" +#ifdef HAVE_MC +#include "src/mc/mc_private.h" +#include "src/mc/mc_protocol.h" +#include "src/mc/mc_client.h" +#endif + +#ifdef HAVE_MC +#include +#include "src/mc/mc_protocol.h" +#endif + +#include "src/mc/mc_record.h" + +#ifdef HAVE_SMPI +#include "src/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)"); @@ -20,11 +45,9 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix, 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 @@ -33,15 +56,88 @@ int _sg_do_verbose_exit = 1; 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 + } + 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) @@ -58,6 +154,10 @@ XBT_INLINE double SIMIX_timer_next(void) */ void SIMIX_global_init(int *argc, char **argv) { +#ifdef HAVE_MC + _sg_do_model_check = getenv(MC_ENV_VARIABLE) != NULL; +#endif + s_smx_process_t proc; if (!simix_global) { @@ -81,10 +181,11 @@ void SIMIX_global_init(int *argc, char **argv) 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(); @@ -99,6 +200,10 @@ void SIMIX_global_init(int *argc, char **argv) /* 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); @@ -108,31 +213,43 @@ void SIMIX_global_init(int *argc, char **argv) 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. + MC_client_init(); +#endif + if (_sg_cfg_exit_asap) exit(0); } +int smx_cleaned = 0; /** * \ingroup SIMIX_API * \brief Clean the SIMIX simulation * * This functions remove the memory used by SIMIX */ -static void SIMIX_clean(void) +void SIMIX_clean(void) { -#ifdef HAVE_TRACING - TRACE_end(); -#endif #ifdef TIME_BENCH_PER_SR smx_ctx_raw_new_sr(); #endif - - /* Kill everyone (except maestro) */ + if (smx_cleaned) return; // to avoid double cleaning by java and C + smx_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 */ @@ -149,6 +266,9 @@ static void SIMIX_clean(void) 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); @@ -166,14 +286,14 @@ static void SIMIX_clean(void) #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; @@ -189,7 +309,7 @@ static void SIMIX_clean(void) */ 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(); @@ -215,9 +335,14 @@ static int process_syscall_color(void *p) */ 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; @@ -244,7 +369,7 @@ void SIMIX_run(void) 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 */ @@ -277,16 +402,16 @@ void SIMIX_run(void) * - 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. @@ -304,15 +429,33 @@ void SIMIX_run(void) 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 */ @@ -320,20 +463,28 @@ void SIMIX_run(void) /* 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 */ @@ -341,7 +492,7 @@ void SIMIX_run(void) 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); } @@ -349,15 +500,16 @@ void SIMIX_run(void) /* 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_WARN("Oops ! Deadlock or code not perfectly clean."); + XBT_CRITICAL("Oops ! Deadlock or code not perfectly clean."); SIMIX_display_process_status(); xbt_abort(); } @@ -372,7 +524,7 @@ void SIMIX_run(void) * \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); @@ -380,6 +532,16 @@ XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg) 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; } /** @@ -440,78 +602,74 @@ void SIMIX_display_process_status(void) ("Legend of the following listing: \"Process (@): \""); 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_get_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_get_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); } -