X-Git-Url: http://plrg.eecs.uci.edu/git/?p=c11tester.git;a=blobdiff_plain;f=main.cc;h=300306a461bc6c4f1f9f902239bb285567d8c493;hp=62acd90de18e4e05114b4519af0e707f5f954aa1;hb=e919b30ee6f7aa594c61fc305e6e88e789dbd700;hpb=08b08df583f48064ec920b56162526f38b1db481

diff --git a/main.cc b/main.cc
index 62acd90d..300306a4 100644
--- a/main.cc
+++ b/main.cc
@@ -2,6 +2,8 @@
  *  @brief Entry point for the model checker.
  */
 
+#include <unistd.h>
+
 #include "libthreads.h"
 #include "common.h"
 #include "threads.h"
@@ -12,57 +14,77 @@
 #include "model.h"
 #include "snapshot-interface.h"
 
-/**
- * The thread_system_next function takes the next step in the execution, if
- * possible.
- * @return Returns 0 (success) if there is another step and non-zero otherwise.
- */
-static int thread_system_next(void) {
-	Thread *curr, *next;
-
-	curr = thread_current();
-	if (curr) {
-		if (curr->get_state() == THREAD_READY) {
-			model->check_current_action();
-			model->scheduler->add_thread(curr);
-		} else if (curr->get_state() == THREAD_RUNNING) {
-			/* Stopped while running; i.e., completed */
-			curr->complete();
-		} else {
-			ASSERT(false);
-		}
-	}
-	next = model->scheduler->next_thread();
-
-	/* Infeasible -> don't take any more steps */
-	if (!model->isfeasible())
-		return 1;
-
-	if (next)
-		next->set_state(THREAD_RUNNING);
-	DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
+static void param_defaults(struct model_params * params) {
+	params->maxreads = 0;
+	params->maxfuturedelay = 100;
+	params->fairwindow = 0;
+	params->enabledcount = 1;
+}
 
-	/* next == NULL -> don't take any more steps */
-	if (!next)
-		return 1;
-	/* Return non-zero only if swap fails with an error */
-	return Thread::swap(model->get_system_context(), next);
+static void print_usage(struct model_params *params) {
+	printf(
+"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"
+"-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"
+"-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"
+"--                    Program arguments follow.\n\n",
+params->maxreads, params->maxfuturedelay, params->fairwindow, params->enabledcount);
+	exit(EXIT_SUCCESS);
 }
 
-/** The thread_wait_finish method runs the current execution until we
- *  have no more steps to take.
- */
-static void thread_wait_finish(void) {
-	DBG();
+static void parse_options(struct model_params *params, int *argc, char ***argv) {
+	const char *shortopts = "hm:s:f:e:";
+	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 'f':
+			params->fairwindow = atoi(optarg);
+			break;
+		case 'e':
+			params->enabledcount = atoi(optarg);
+			break;
+		case 'm':
+			params->maxreads = atoi(optarg);
+			break;
+		default: /* '?' */
+			error = true;
+			break;
+		}
+	}
+	(*argc) -= optind;
+	(*argv) += optind;
 
-	while (!thread_system_next());
+	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;
+	struct model_params params;
+
+	param_defaults(&params);
+
+	parse_options(&params, &main_argc, &main_argv);
 
 	//Initialize race detector
 	initRaceDetector();
@@ -70,12 +92,7 @@ static void real_main() {
 	//Create the singleton SnapshotStack object
 	snapshotObject = new SnapshotStack();
 
-	model = new ModelChecker();
-
-	if (getcontext(&main_context))
-		return;
-
-	model->set_system_context(&main_context);
+	model = new ModelChecker(params);
 
 	snapshotObject->snapshotStep(0);
 	do {
@@ -83,7 +100,7 @@ static void real_main() {
 		model->add_thread(new Thread(&user_thread, (void (*)(void *)) &user_main, NULL));
 
 		/* Wait for all threads to complete */
-		thread_wait_finish();
+		model->finish_execution();
 	} while (model->next_execution());
 
 	delete model;
@@ -91,18 +108,14 @@ static void real_main() {
 	DEBUG("Exiting\n");
 }
 
-int main_numargs;
-char ** main_args;
-
 /**
  * Main function.  Just initializes snapshotting library and the
  * snapshotting library calls the real_main function.
  */
-int main(int numargs, char ** args) {
-	/* Stash this stuff in case someone wants it eventually */
-	main_numargs=numargs;
-	main_args=args;
+int main(int argc, char ** argv) {
+	main_argc = argc;
+	main_argv = argv;
 
 	/* Let's jump in quickly and start running stuff */
-	initSnapShotLibrary(10000, 1024, 1024, 1000, &real_main);
+	initSnapshotLibrary(10000, 1024, 1024, 4000, &real_main);
 }