X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/30ddf1eb571e00c6b6e9723d6dc69ce4632471cc..befbbbe1fbb31663a8f91e24ce12df271cf4ae79:/examples/msg/mc/bugged1_liveness.c diff --git a/examples/msg/mc/bugged1_liveness.c b/examples/msg/mc/bugged1_liveness.c index 37a287cdaa..05da543dc7 100644 --- a/examples/msg/mc/bugged1_liveness.c +++ b/examples/msg/mc/bugged1_liveness.c @@ -1,78 +1,97 @@ -/***************** Centralized Mutual Exclusion Algorithm *********************/ -/* This example implements a centralized mutual exclusion algorithm. */ -/* CS requests of client 1 not satisfied */ -/* LTL property checked : G(r->F(cs)); (r=request of CS, cs=CS ok) */ -/******************************************************************************/ +/* Copyright (c) 2012-2017. The SimGrid Team. All rights reserved. */ -#include "msg/msg.h" +/* 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. */ + +/***************** Centralized Mutual Exclusion Algorithm *******************/ +/* This example implements a centralized mutual exclusion algorithm. */ +/* Bug : CS requests of client 1 not satisfied */ +/* LTL property checked : G(r->F(cs)); (r=request of CS, cs=CS ok) */ +/****************************************************************************/ + +#ifdef GARBAGE_STACK +#include +#include +#include +#endif + +#include "simgrid/msg.h" #include "mc/mc.h" -#include "xbt/automaton.h" #include "bugged1_liveness.h" XBT_LOG_NEW_DEFAULT_CATEGORY(bugged1_liveness, "my log messages"); -int r=0; +int r=0; int cs=0; -int predR(){ - return r; -} - -int predCS(){ - return cs; +#ifdef GARBAGE_STACK +/** Do not use a clean stack */ +static void garbage_stack(void) { + const size_t size = 256; + int fd = open("/dev/urandom", O_RDONLY); + char foo[size]; + read(fd, foo, size); + close(fd); } +#endif - -int coordinator(int argc, char *argv[]) +static int coordinator(int argc, char *argv[]) { + int CS_used = 0; + msg_task_t task = NULL; + msg_task_t answer = NULL; + xbt_dynar_t requests = xbt_dynar_new(sizeof(char *), NULL); + char *req; - int CS_used = 0; - msg_task_t task = NULL, answer = NULL; - - while (1) { + while(1){ MSG_task_receive(&task, "coordinator"); - XBT_INFO("task coordinator : %p", task); - const char *kind = MSG_task_get_name(task); - XBT_INFO("kind coordinator : %p", kind); - if (!strcmp(kind, "request")) { - char *req = MSG_task_get_data(task); - XBT_INFO("req coordinator : %p", req); - if (CS_used) { - XBT_INFO("CS already used."); - } else { - if(strcmp(req, "2") == 0){ + const char *kind = MSG_task_get_name(task); + if (!strcmp(kind, "request")) { + req = MSG_task_get_data(task); + if (CS_used) { + XBT_INFO("CS already used. Queue the request."); + xbt_dynar_push(requests, &req); + } else { + if(strcmp(req, "1") != 0){ XBT_INFO("CS idle. Grant immediatly"); - MC_compare(); answer = MSG_task_create("grant", 0, 1000, NULL); - XBT_INFO("answer coordinator : %p", answer); MSG_task_send(answer, req); CS_used = 1; answer = NULL; } } - } else { - XBT_INFO("CS release. resource now idle"); - CS_used = 0; + } else { + if (!xbt_dynar_is_empty(requests)) { + XBT_INFO("CS release. Grant to queued requests (queue size: %lu)", xbt_dynar_length(requests)); + xbt_dynar_shift(requests, &req); + if(strcmp(req, "1") != 0){ + MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req); + }else{ + xbt_dynar_push(requests, &req); + CS_used = 0; + } + }else{ + XBT_INFO("CS release. resource now idle"); + CS_used = 0; + } } MSG_task_destroy(task); task = NULL; kind = NULL; + req = NULL; } - return 0; } -int client(int argc, char *argv[]) +static int client(int argc, char *argv[]) { int my_pid = MSG_process_get_PID(MSG_process_self()); - char *my_mailbox = bprintf("%s", argv[1]); - XBT_INFO("my mailbox client : %p", my_mailbox); - msg_task_t grant = NULL, release = NULL; - + char *my_mailbox = xbt_strdup(argv[1]); + msg_task_t grant = NULL; + msg_task_t release = NULL; - while(1) { - + while(1){ XBT_INFO("Ask the request"); MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator"); @@ -83,9 +102,7 @@ int client(int argc, char *argv[]) } MSG_task_receive(&grant, my_mailbox); - XBT_INFO("grant client : %p", grant); const char *kind = MSG_task_get_name(grant); - XBT_INFO("kind client : %p", kind); if((strcmp(my_mailbox, "1") == 0) && (strcmp("grant", kind) == 0)){ cs = 1; @@ -102,37 +119,46 @@ int client(int argc, char *argv[]) MSG_process_sleep(1); release = MSG_task_create("release", 0, 1000, NULL); - XBT_INFO("release coordinator : %p", release); MSG_task_send(release, "coordinator"); release = NULL; MSG_process_sleep(my_pid); - + if(strcmp(my_mailbox, "1") == 0){ cs=0; r=0; XBT_INFO("Propositions changed : r=0, cs=0"); } - - } + } return 0; } -int main(int argc, char *argv[]) +static int raw_client(int argc, char *argv[]) { +#ifdef GARBAGE_STACK + // At this point the stack of the callee (client) is probably filled with + // zeros and uninitialized variables will contain 0. This call will place + // random byes in the stack of the callee: + garbage_stack(); +#endif + return client(argc, argv); +} +int main(int argc, char *argv[]) +{ MSG_init(&argc, argv); - MSG_config("model-check/property","promela_bugged1_liveness"); - MC_automaton_new_propositional_symbol("r", &predR); - MC_automaton_new_propositional_symbol("cs", &predCS); - - MSG_create_environment("../msg_platform.xml"); + MC_automaton_new_propositional_symbol_pointer("r", &r); + MC_automaton_new_propositional_symbol_pointer("cs", &cs); + + MSG_create_environment(argv[1]); + MSG_function_register("coordinator", coordinator); - MSG_function_register("client", client); - MSG_launch_application("deploy_bugged1_liveness.xml"); + MSG_function_register("client", raw_client); + MSG_launch_application(argv[2]); + MSG_main(); return 0;