a number of fixes to add missing mo_graph edges to speed up detection of infeasible

[model-checker.git] / snapshot.cc

diff --git a/snapshot.cc b/snapshot.cc
index 642885b038df274b68eb028e7a25d5563b9f2ec6..6d59e7be6f68cae62c018639d2deeaeb4c36d0c7 100644 (file)
--- a/snapshot.cc
+++ b/snapshot.cc
@@ -139,7 +139,7 @@ void initSnapShotLibrary(unsigned int numbackingpages,
                unsigned int numheappages, VoidFuncPtr entryPoint) {
        /* Setup a stack for our signal handler....  */
        stack_t ss;
-       ss.ss_sp = model_malloc(SIGSTACKSIZE);
+       ss.ss_sp = PageAlignAddressUpward(model_malloc(SIGSTACKSIZE+PAGESIZE-1));
        ss.ss_size = SIGSTACKSIZE;
        ss.ss_flags = 0;
        sigaltstack(&ss, NULL);
@@ -283,8 +283,17 @@ snapshot_id takeSnapshot( ){
  *  @param theID is the snapshot identifier to rollback to.
  */
 void rollBack( snapshot_id theID ){
+#if USE_MPOTECT_SNAPSHOT==2
+       if (snapshotrecord->lastSnapShot==(theID+1)) {
+               for(unsigned int page=snapshotrecord->snapShots[theID].firstBackingPage; page<snapshotrecord->lastBackingPage; page++) {
+                       memcpy(snapshotrecord->backingRecords[page].basePtrOfPage, &snapshotrecord->backingStore[page], sizeof(struct SnapShotPage));
+               }
+               return;
+       }
+#endif
+
 #if USE_MPROTECT_SNAPSHOT
-       HashTable< void *, bool, uintptr_t, 4, model_malloc, MYCALLOC, MYFREE> duplicateMap;
+       HashTable< void *, bool, uintptr_t, 4, model_malloc, model_calloc, model_free> duplicateMap;
        for(unsigned int region=0; region<snapshotrecord->lastRegion;region++) {
                if( mprotect(snapshotrecord->regionsToSnapShot[region].basePtr, snapshotrecord->regionsToSnapShot[region].sizeInPages*sizeof(struct SnapShotPage), PROT_READ | PROT_WRITE ) == -1 ){
                        perror("mprotect");