/* 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 <string.h>
+
+#include "mc_base.h"
+
+#ifndef _XBT_WIN32
#include <unistd.h>
-#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
-#include <sys/mman.h>
-#include <libgen.h>
+#endif
#include "simgrid/sg_config.h"
#include "../surf/surf_private.h"
#include "../simix/smx_private.h"
-#include "../xbt/mmalloc/mmprivate.h"
#include "xbt/fifo.h"
-#include "mc_private.h"
#include "xbt/automaton.h"
#include "xbt/dict.h"
-XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
- "Logging specific to MC (global)");
-
-/* Configuration support */
-e_mc_reduce_t mc_reduce_kind = e_mc_reduce_unset;
-
-int _sg_do_model_check = 0;
-int _sg_mc_checkpoint = 0;
-int _sg_mc_sparse_checkpoint = 0;
-int _sg_mc_soft_dirty = 0;
-char *_sg_mc_property_file = NULL;
-int _sg_mc_timeout = 0;
-int _sg_mc_hash = 0;
-int _sg_mc_max_depth = 1000;
-int _sg_mc_visited = 0;
-char *_sg_mc_dot_output_file = NULL;
-int _sg_mc_comms_determinism = 0;
-int _sg_mc_send_determinism = 0;
-int _sg_mc_safety = 0;
-int _sg_mc_liveness = 0;
-
-int user_max_depth_reached = 0;
-
-void _mc_cfg_cb_reduce(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a reduction strategy after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- char *val = xbt_cfg_get_string(_sg_cfg_set, name);
- if (!strcasecmp(val, "none")) {
- mc_reduce_kind = e_mc_reduce_none;
- } else if (!strcasecmp(val, "dpor")) {
- mc_reduce_kind = e_mc_reduce_dpor;
- } else {
- xbt_die("configuration option %s can only take 'none' or 'dpor' as a value",
- name);
- }
-}
-
-void _mc_cfg_cb_checkpoint(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a checkpointing value after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_checkpoint = xbt_cfg_get_int(_sg_cfg_set, name);
-}
-
-void _mc_cfg_cb_sparse_checkpoint(const char *name, int pos) {
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die("You are specifying a checkpointing value after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_sparse_checkpoint = xbt_cfg_get_boolean(_sg_cfg_set, name);
-}
-
-void _mc_cfg_cb_soft_dirty(const char *name, int pos) {
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die("You are specifying a soft dirty value after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_soft_dirty = xbt_cfg_get_boolean(_sg_cfg_set, name);
-}
-
-void _mc_cfg_cb_property(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a property after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_property_file = xbt_cfg_get_string(_sg_cfg_set, name);
-}
-
-void _mc_cfg_cb_timeout(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a value to enable/disable timeout for wait requests after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_timeout = xbt_cfg_get_boolean(_sg_cfg_set, name);
-}
-
-void _mc_cfg_cb_hash(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a value to enable/disable the use of global hash to speedup state comparaison, but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_hash = xbt_cfg_get_boolean(_sg_cfg_set, name);
-}
+#ifdef HAVE_MC
+#include <libunwind.h>
-void _mc_cfg_cb_max_depth(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a max depth value after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_max_depth = xbt_cfg_get_int(_sg_cfg_set, name);
-}
+#include "../xbt/mmalloc/mmprivate.h"
+#include "mc_object_info.h"
+#include "mc_comm_pattern.h"
+#include "mc_request.h"
+#include "mc_safety.h"
+#include "mc_memory_map.h"
+#include "mc_snapshot.h"
+#include "mc_liveness.h"
+#include "mc_private.h"
+#include "mc_unw.h"
+#endif
+#include "mc_record.h"
+#include "mc_protocol.h"
+#include "mc_client.h"
-void _mc_cfg_cb_visited(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a number of stored visited states after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_visited = xbt_cfg_get_int(_sg_cfg_set, name);
-}
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_global, mc,
+ "Logging specific to MC (global)");
-void _mc_cfg_cb_dot_output(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a file name for a dot output of graph state after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_dot_output_file = xbt_cfg_get_string(_sg_cfg_set, name);
-}
+e_mc_mode_t mc_mode;
-void _mc_cfg_cb_comms_determinism(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a value to enable/disable the detection of determinism in the communications schemes after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_comms_determinism = xbt_cfg_get_boolean(_sg_cfg_set, name);
- mc_reduce_kind = e_mc_reduce_none;
-}
+double *mc_time = NULL;
-void _mc_cfg_cb_send_determinism(const char *name, int pos)
-{
- if (_sg_cfg_init_status && !_sg_do_model_check) {
- xbt_die
- ("You are specifying a value to enable/disable the detection of send-determinism in the communications schemes after the initialization (through MSG_config?), but model-checking was not activated at config time (through --cfg=model-check:1). This won't work, sorry.");
- }
- _sg_mc_send_determinism = xbt_cfg_get_boolean(_sg_cfg_set, name);
- mc_reduce_kind = e_mc_reduce_none;
-}
+#ifdef HAVE_MC
+int user_max_depth_reached = 0;
/* MC global data structures */
mc_state_t mc_current_state = NULL;
char mc_replay_mode = FALSE;
-double *mc_time = NULL;
+
__thread mc_comparison_times_t mc_comp_times = NULL;
__thread double mc_snapshot_comparison_time;
mc_stats_t mc_stats = NULL;
/* Liveness */
xbt_automaton_t _mc_property_automaton = NULL;
-/* Variables */
-mc_object_info_t mc_libsimgrid_info = NULL;
-mc_object_info_t mc_binary_info = NULL;
-
-mc_object_info_t mc_object_infos[2] = { NULL, NULL };
-
-size_t mc_object_infos_size = 2;
-
/* Dot output */
FILE *dot_output = NULL;
const char *colors[13];
}
-static void MC_init_debug_info(void)
+void MC_init()
{
- XBT_INFO("Get debug information ...");
-
- memory_map_t maps = MC_get_memory_map();
-
- /* Get local variables for state equality detection */
- mc_binary_info = MC_find_object_info(maps, xbt_binary_name, 1);
- mc_object_infos[0] = mc_binary_info;
-
- mc_libsimgrid_info = MC_find_object_info(maps, libsimgrid_path, 0);
- mc_object_infos[1] = mc_libsimgrid_info;
-
- // Use information of the other objects:
- MC_post_process_object_info(mc_binary_info);
- MC_post_process_object_info(mc_libsimgrid_info);
-
- MC_free_memory_map(maps);
- XBT_INFO("Get debug information done !");
+ MC_init_pid(getpid(), -1);
}
-
-mc_model_checker_t mc_model_checker = NULL;
-
-void MC_init()
+void MC_init_pid(pid_t pid, int socket)
{
+ if (mc_mode == MC_MODE_NONE) {
+ if (getenv(MC_ENV_SOCKET_FD)) {
+ mc_mode = MC_MODE_CLIENT;
+ } else {
+ mc_mode = MC_MODE_STANDALONE;
+ }
+ }
+
int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
mc_time = xbt_new0(double, simix_process_maxpid);
MC_SET_MC_HEAP;
- mc_model_checker = xbt_new0(s_mc_model_checker_t, 1);
- mc_model_checker->pages = mc_pages_store_new();
- mc_model_checker->fd_clear_refs = -1;
- mc_model_checker->fd_pagemap = -1;
+ mc_model_checker = MC_model_checker_new(pid, socket);
mc_comp_times = xbt_new0(s_mc_comparison_times_t, 1);
mc_stats = xbt_new0(s_mc_stats_t, 1);
mc_stats->state_size = 1;
- MC_init_memory_map_info();
- MC_init_debug_info(); /* FIXME : get debug information only if liveness verification or visited state reduction */
-
if ((_sg_mc_dot_output_file != NULL) && (_sg_mc_dot_output_file[0] != '\0'))
MC_init_dot_output();
/* Ignore local variable about time used for tracing */
MC_ignore_local_variable("start_time", "*");
+ /* Main MC state: */
MC_ignore_global_variable("mc_model_checker");
+ MC_ignore_global_variable("communications_pattern");
+ MC_ignore_global_variable("initial_communications_pattern");
+ MC_ignore_global_variable("incomplete_communications_pattern");
- // Mot of those things could be moved into mc_model_checker:
- MC_ignore_global_variable("compared_pointers");
+ /* MC __thread variables: */
+ MC_ignore_global_variable("mc_diff_info");
MC_ignore_global_variable("mc_comp_times");
MC_ignore_global_variable("mc_snapshot_comparison_time");
+
+ /* This MC state is used in MC replay as well: */
MC_ignore_global_variable("mc_time");
- MC_ignore_global_variable("smpi_current_rank");
- MC_ignore_global_variable("counter"); /* Static variable used for tracing */
- MC_ignore_global_variable("maestro_stack_start");
- MC_ignore_global_variable("maestro_stack_end");
- MC_ignore_global_variable("smx_total_comms");
- MC_ignore_global_variable("communications_pattern");
- MC_ignore_global_variable("initial_communications_pattern");
- MC_ignore_global_variable("incomplete_communications_pattern");
- if (MC_is_active()) {
- MC_ignore_global_variable("mc_diff_info");
- }
+ /* Static variable used for tracing */
+ MC_ignore_global_variable("counter");
+
+ /* SIMIX */
+ MC_ignore_global_variable("smx_total_comms");
MC_ignore_heap(mc_time, simix_process_maxpid * sizeof(double));
smx_process_t process;
- xbt_swag_foreach(process, simix_global->process_list) {
- MC_ignore_heap(&(process->process_hookup),
- sizeof(process->process_hookup));
- }
+ // FIXME, cross-process support (simix_global->process_list)
+
+ if (mc_mode == MC_MODE_STANDALONE || mc_mode == MC_MODE_CLIENT) {
+ xbt_swag_foreach(process, simix_global->process_list) {
+ MC_ignore_heap(&(process->process_hookup),
+ sizeof(process->process_hookup));
+ }
+ } else {
+ // TODO
+ }
}
if (raw_mem_set)
MC_SET_MC_HEAP;
+ if (mc_mode == MC_MODE_CLIENT) {
+ // This will move somehwere else:
+ MC_client_handle_messages();
+ }
+
}
/******************************* Core of MC *******************************/
//xbt_abort();
}
-int SIMIX_pre_mc_random(smx_simcall_t simcall, int min, int max)
-{
-
- return simcall->mc_value;
-}
-
-
-int MC_random(int min, int max)
-{
- /*FIXME: return mc_current_state->executed_transition->random.value; */
- return simcall_mc_random(min, max);
-}
-
-/**
- * \brief Schedules all the process that are ready to run
- */
-void MC_wait_for_requests(void)
-{
- smx_process_t process;
- smx_simcall_t req;
- unsigned int iter;
-
- while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
- SIMIX_process_runall();
- xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
- req = &process->simcall;
- if (req->call != SIMCALL_NONE && !MC_request_is_visible(req))
- SIMIX_simcall_enter(req, 0);
- }
- }
-}
-
int MC_deadlock_check()
{
int deadlock = FALSE;
if (xbt_swag_size(simix_global->process_list)) {
deadlock = TRUE;
xbt_swag_foreach(process, simix_global->process_list) {
- if (process->simcall.call != SIMCALL_NONE
- && MC_request_is_enabled(&process->simcall)) {
+ if (MC_request_is_enabled(&process->simcall)) {
deadlock = FALSE;
break;
}
return deadlock;
}
+void mc_update_comm_pattern(mc_call_type call_type, smx_simcall_t req, int value, xbt_dynar_t pattern) {
+ switch(call_type) {
+ case MC_CALL_TYPE_NONE:
+ break;
+ case MC_CALL_TYPE_SEND:
+ case MC_CALL_TYPE_RECV:
+ get_comm_pattern(pattern, req, call_type);
+ break;
+ case MC_CALL_TYPE_WAIT:
+ {
+ smx_synchro_t current_comm = NULL;
+ if (call_type == MC_CALL_TYPE_WAIT)
+ current_comm = simcall_comm_wait__get__comm(req);
+ else
+ current_comm = xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_synchro_t);
+ // First wait only must be considered:
+ if (current_comm->comm.refcount == 1)
+ complete_comm_pattern(pattern, current_comm);
+ break;
+ }
+ default:
+ xbt_die("Unexpected call type %i", (int)call_type);
+ }
+}
+
/**
* \brief Re-executes from the state at position start all the transitions indicated by
* a given model-checker stack.
* \param stack The stack with the transitions to execute.
* \param start Start index to begin the re-execution.
+ *
+ * If start==-1, restore the initial state and replay the actions the
+ * the transitions in the stack.
+ *
+ * Otherwise, we only replay a part of the transitions of the stacks
+ * without restoring the state: it is assumed that the current state
+ * match with the transitions to execute.
*/
void MC_replay(xbt_fifo_t stack, int start)
{
int raw_mem = (mmalloc_get_current_heap() == mc_heap);
- int value, i = 1, count = 1, call = 0, j;
+ int value, i = 1, count = 1, j;
char *req_str;
smx_simcall_t req = NULL, saved_req = NULL;
xbt_fifo_item_t item, start_item;
mc_state_t state;
smx_process_t process = NULL;
- smx_action_t current_comm;
XBT_DEBUG("**** Begin Replay ****");
MC_SET_STD_HEAP;
-
/* Traverse the stack from the state at position start and re-execute the transitions */
for (item = start_item;
item != xbt_fifo_get_first_item(stack);
}
/* TODO : handle test and testany simcalls */
+ mc_call_type call = MC_CALL_TYPE_NONE;
if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
- if (req->call == SIMCALL_COMM_ISEND)
- call = 1;
- else if (req->call == SIMCALL_COMM_IRECV)
- call = 2;
- else if (req->call == SIMCALL_COMM_WAIT)
- call = 3;
- else if (req->call == SIMCALL_COMM_WAITANY)
- call = 4;
+ call = mc_get_call_type(req);
}
- SIMIX_simcall_enter(req, value);
+ SIMIX_simcall_handle(req, value);
if (_sg_mc_comms_determinism || _sg_mc_send_determinism) {
MC_SET_MC_HEAP;
- if (call == 1) { /* Send */
- get_comm_pattern(communications_pattern, req, call);
- } else if (call == 2) { /* Recv */
- get_comm_pattern(communications_pattern, req, call);
- } else if (call == 3) { /* Wait */
- current_comm = simcall_comm_wait__get__comm(req);
- if (current_comm->comm.refcount == 1) /* First wait only must be considered */
- complete_comm_pattern(communications_pattern, current_comm);
- } else if (call == 4) { /* WaitAny */
- current_comm = xbt_dynar_get_as(simcall_comm_waitany__get__comms(req), value, smx_action_t);
- if (current_comm->comm.refcount == 1) /* First wait only must be considered */
- complete_comm_pattern(communications_pattern, current_comm);
- }
+ mc_update_comm_pattern(call, req, value, communications_pattern);
MC_SET_STD_HEAP;
- call = 0;
}
-
MC_wait_for_requests();
count++;
}
- SIMIX_simcall_enter(req, value);
+ SIMIX_simcall_handle(req, value);
MC_wait_for_requests();
}
XBT_INFO("*** PROPERTY NOT VALID ***");
XBT_INFO("**************************");
XBT_INFO("Counter-example execution trace:");
+ MC_record_dump_path(mc_stack);
MC_dump_stack_safety(mc_stack);
MC_print_statistics(mc_stats);
xbt_abort();
user_max_depth_reached = 1;
}
-void MC_process_clock_add(smx_process_t process, double amount)
-{
- mc_time[process->pid] += amount;
-}
-
-double MC_process_clock_get(smx_process_t process)
-{
- if (mc_time) {
- if (process != NULL)
- return mc_time[process->pid];
- else
- return -1;
- } else {
- return 0;
- }
-}
-
void MC_automaton_load(const char *file)
{
MC_SET_MC_HEAP;
}
+
+void MC_dump_stacks(FILE* file)
+{
+ int raw_mem_set = (mmalloc_get_current_heap() == mc_heap);
+ MC_SET_MC_HEAP;
+
+ int nstack = 0;
+ stack_region_t current_stack;
+ unsigned cursor;
+ xbt_dynar_foreach(stacks_areas, cursor, current_stack) {
+ unw_context_t * context = (unw_context_t *)current_stack->context;
+ fprintf(file, "Stack %i:\n", nstack);
+
+ int nframe = 0;
+ char buffer[100];
+ unw_cursor_t c;
+ unw_init_local (&c, context);
+ unw_word_t off;
+ do {
+ const char * name = !unw_get_proc_name(&c, buffer, 100, &off) ? buffer : "?";
+ fprintf(file, " %i: %s\n", nframe, name);
+ ++nframe;
+ } while(unw_step(&c));
+
+ ++nstack;
+ }
+
+ if (raw_mem_set)
+ MC_SET_MC_HEAP;
+}
+#endif
+
+double MC_process_clock_get(smx_process_t process)
+{
+ if (mc_time) {
+ if (process != NULL)
+ return mc_time[process->pid];
+ else
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+void MC_process_clock_add(smx_process_t process, double amount)
+{
+ mc_time[process->pid] += amount;
+}
