+/** @file main.cc
+ * @brief Entry point for the model checker.
+ */
+
#include "libthreads.h"
#include "common.h"
#include "threads.h"
+#include "datarace.h"
+
/* global "model" object */
#include "model.h"
-#include "snapshot.h"
+#include "snapshot-interface.h"
-/*
- * Return 1 if found next thread, 0 otherwise
+/**
+ * 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.
*/
-int num;
-int num1;
-int num2;
-
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();
- if (next)
- next->set_state(THREAD_RUNNING);
- DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
- if (!next)
- return 1;
- return Thread::swap(model->get_system_context(), next);
+ 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);
+
+ /* 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);
}
+/** The thread_wait_finish method runs the current execution until we
+ * have no more steps to take.
+ */
static void thread_wait_finish(void) {
- DBG();
+ DBG();
- while (!thread_system_next());
+ while (!thread_system_next());
}
-void real_main() {
- thrd_t user_thread;
- ucontext_t main_context;
-
- model = new ModelChecker();
-
- if (getcontext(&main_context))
- return;
-
- model->set_system_context(&main_context);
-
- do {
- /* Start user program */
- model->add_thread(new Thread(&user_thread, &user_main, NULL));
-
- /* Wait for all threads to complete */
- thread_wait_finish();
- } while (model->next_execution());
-
- delete model;
-
- DEBUG("Exiting\n");
+static void parse_options(struct model_params *params, int argc, char **argv) {
}
-int main_numargs;
-char ** main_args;
+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;
+
+ parse_options(¶ms, main_argc, main_argv);
+
+ //Initialize race detector
+ initRaceDetector();
+
+ //Create the singleton SnapshotStack object
+ snapshotObject = new SnapshotStack();
+
+ 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 */
+ thread_wait_finish();
+ } while (model->next_execution());
+
+ delete model;
+
+ DEBUG("Exiting\n");
+}
-/*
- * Main system function
+/**
+ * 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 /*int numbackingpages*/, 1024 /*unsigned int numsnapshots*/, 1024 /*unsigned int nummemoryregions*/ , &real_main /*MyFuncPtr entryPoint*/);
+ /* Let's jump in quickly and start running stuff */
+ initSnapShotLibrary(10000, 1024, 1024, 1000, &real_main);
}