model: schedule appropriate fence backtracking points

[c11tester.git] / main.cc

diff --git a/main.cc b/main.cc
index 6f1483b7decbcebb809c6469489b2815a0965516..dc3f6f4dca002d6e763e5bbf25068260d3edc828 100644 (file)
--- a/main.cc
+++ b/main.cc
@@ -2,9 +2,10 @@
  *  @brief Entry point for the model checker.
  */
 
-#include "libthreads.h"
+#include <unistd.h>
+
 #include "common.h"
-#include "threads.h"
+#include "output.h"
 
 #include "datarace.h"
 
@@ -12,42 +13,121 @@
 #include "model.h"
 #include "snapshot-interface.h"
 
-static void parse_options(struct model_params *params, int argc, char **argv) {
+static void param_defaults(struct model_params *params)
+{
+       params->maxreads = 0;
+       params->maxfuturedelay = 100;
+       params->fairwindow = 0;
+       params->enabledcount = 1;
+       params->bound = 0;
+       params->maxfuturevalues = 0;
+       params->expireslop = 10;
+       params->verbose = 0;
+}
+
+static void print_usage(struct model_params *params)
+{
+       /* Reset defaults before printing */
+       param_defaults(params);
+
+       model_print(
+"Usage: <program name> [MC_OPTIONS] -- [PROGRAM ARGUMENTS]\n"
+"\n"
+"Options:\n"
+"-h                    Display this help message and exit\n"
+"-m                    Maximum times a thread can read from the same write\n"
+"                      while other writes exist. Default: %d\n"
+"-M                    Maximum number of future values that can be sent to\n"
+"                      the same read. Default: %d\n"
+"-s                    Maximum actions that the model checker will wait for\n"
+"                      a write from the future past the expected number of\n"
+"                      actions. Default: %d\n"
+"-S                    Future value expiration sloppiness. Default: %u\n"
+"-f                    Specify a fairness window in which actions that are\n"
+"                      enabled sufficiently many times should receive\n"
+"                      priority for execution. Default: %d\n"
+"-e                    Enabled count. Default: %d\n"
+"-b                    Upper length bound. Default: %d\n"
+"-v                    Print verbose execution information.\n"
+"--                    Program arguments follow.\n\n",
+params->maxreads, params->maxfuturevalues, params->maxfuturedelay, params->expireslop, params->fairwindow, params->enabledcount, params->bound);
+       exit(EXIT_SUCCESS);
+}
+
+static void parse_options(struct model_params *params, int argc, char **argv)
+{
+       const char *shortopts = "hm:M:s:S:f:e:b:v";
+       int opt;
+       bool error = false;
+       while (!error && (opt = getopt(argc, argv, shortopts)) != -1) {
+               switch (opt) {
+               case 'h':
+                       print_usage(params);
+                       break;
+               case 's':
+                       params->maxfuturedelay = atoi(optarg);
+                       break;
+               case 'S':
+                       params->expireslop = atoi(optarg);
+                       break;
+               case 'f':
+                       params->fairwindow = atoi(optarg);
+                       break;
+               case 'e':
+                       params->enabledcount = atoi(optarg);
+                       break;
+               case 'b':
+                       params->bound = atoi(optarg);
+                       break;
+               case 'm':
+                       params->maxreads = atoi(optarg);
+                       break;
+               case 'M':
+                       params->maxfuturevalues = atoi(optarg);
+                       break;
+               case 'v':
+                       params->verbose = 1;
+                       break;
+               default: /* '?' */
+                       error = true;
+                       break;
+               }
+       }
+
+       /* Pass remaining arguments to user program */
+       params->argc = argc - (optind - 1);
+       params->argv = argv + (optind - 1);
+
+       /* Reset program name */
+       params->argv[0] = argv[0];
+
+       /* Reset (global) optind for potential use by user program */
+       optind = 1;
+
+       if (error)
+               print_usage(params);
 }
 
 int main_argc;
 char **main_argv;
 
-/** The real_main function contains the main model checking loop. */
-static void real_main() {
-       thrd_t user_thread;
-       ucontext_t main_context;
+/** The model_main function contains the main model checking loop. */
+static void model_main()
+{
        struct model_params params;
 
+       param_defaults(&params);
+
        parse_options(&params, main_argc, main_argv);
 
        //Initialize race detector
        initRaceDetector();
 
-       //Create the singleton SnapshotStack object
-       snapshotObject = new SnapshotStack();
+       snapshot_stack_init();
 
        model = new ModelChecker(params);
-
-       if (getcontext(&main_context))
-               return;
-
-       model->set_system_context(&main_context);
-
-       snapshotObject->snapshotStep(0);
-       do {
-               /* Start user program */
-               model->add_thread(new Thread(&user_thread, (void (*)(void *)) &user_main, NULL));
-
-               /* Wait for all threads to complete */
-               model->finish_execution();
-       } while (model->next_execution());
-
+       snapshot_record(0);
+       model->run();
        delete model;
 
        DEBUG("Exiting\n");
@@ -55,12 +135,16 @@ static void real_main() {
 
 /**
  * Main function.  Just initializes snapshotting library and the
- * snapshotting library calls the real_main function.
+ * snapshotting library calls the model_main function.
  */
-int main(int argc, char ** argv) {
+int main(int argc, char **argv)
+{
        main_argc = argc;
        main_argv = argv;
 
+       /* Configure output redirection for the model-checker */
+       redirect_output();
+
        /* Let's jump in quickly and start running stuff */
-       initSnapShotLibrary(10000, 1024, 1024, 1000, &real_main);
+       snapshot_system_init(10000, 1024, 1024, 4000, &model_main);
 }