* structures for the mprotect based snapshot.
*/
static void initSnapShotRecord(unsigned int numbackingpages, unsigned int numsnapshots, unsigned int nummemoryregions) {
- snapshotrecord=( struct SnapShot * )MYMALLOC(sizeof(struct SnapShot));
- snapshotrecord->regionsToSnapShot=( struct MemoryRegion * )MYMALLOC(sizeof(struct MemoryRegion)*nummemoryregions);
- snapshotrecord->backingStoreBasePtr= ( struct SnapShotPage * )MYMALLOC( sizeof( struct SnapShotPage ) * (numbackingpages + 1) );
+ snapshotrecord=( struct SnapShot * )model_malloc(sizeof(struct SnapShot));
+ snapshotrecord->regionsToSnapShot=( struct MemoryRegion * )model_malloc(sizeof(struct MemoryRegion)*nummemoryregions);
+ snapshotrecord->backingStoreBasePtr= ( struct SnapShotPage * )model_malloc( sizeof( struct SnapShotPage ) * (numbackingpages + 1) );
//Page align the backingstorepages
snapshotrecord->backingStore=( struct SnapShotPage * )PageAlignAddressUpward(snapshotrecord->backingStoreBasePtr);
- snapshotrecord->backingRecords=( struct BackingPageRecord * )MYMALLOC(sizeof(struct BackingPageRecord)*numbackingpages);
- snapshotrecord->snapShots= ( struct SnapShotRecord * )MYMALLOC(sizeof(struct SnapShotRecord)*numsnapshots);
+ snapshotrecord->backingRecords=( struct BackingPageRecord * )model_malloc(sizeof(struct BackingPageRecord)*numbackingpages);
+ snapshotrecord->snapShots= ( struct SnapShotRecord * )model_malloc(sizeof(struct SnapShotRecord)*numsnapshots);
snapshotrecord->lastSnapShot=0;
snapshotrecord->lastBackingPage=0;
snapshotrecord->lastRegion=0;
#endif
-/** The initSnapShotLibrary function initializes the Snapshot library.
+/** The initSnapshotLibrary function initializes the snapshot library.
* @param entryPoint the function that should run the program.
*/
#if USE_MPROTECT_SNAPSHOT
-void initSnapShotLibrary(unsigned int numbackingpages,
+void initSnapshotLibrary(unsigned int numbackingpages,
unsigned int numsnapshots, unsigned int nummemoryregions,
unsigned int numheappages, VoidFuncPtr entryPoint) {
/* Setup a stack for our signal handler.... */
stack_t ss;
- ss.ss_sp = MYMALLOC(SIGSTACKSIZE);
+ ss.ss_sp = PageAlignAddressUpward(model_malloc(SIGSTACKSIZE+PAGESIZE-1));
ss.ss_size = SIGSTACKSIZE;
ss.ss_flags = 0;
sigaltstack(&ss, NULL);
HandlePF(SIGSEGV, &si, NULL);
snapshotrecord->lastBackingPage--; //remove the fake page we copied
- basemySpace=MYMALLOC((numheappages+1)*PAGESIZE);
+ void *basemySpace = model_malloc((numheappages+1)*PAGESIZE);
void * pagealignedbase=PageAlignAddressUpward(basemySpace);
- mySpace = create_mspace_with_base(pagealignedbase, numheappages*PAGESIZE, 1 );
+ snapshot_space = create_mspace_with_base(pagealignedbase, numheappages*PAGESIZE, 1 );
addMemoryRegionToSnapShot(pagealignedbase, numheappages);
entryPoint();
}
#else
-void initSnapShotLibrary(unsigned int numbackingpages,
+void initSnapshotLibrary(unsigned int numbackingpages,
unsigned int numsnapshots, unsigned int nummemoryregions,
unsigned int numheappages, VoidFuncPtr entryPoint) {
- basemySpace=system_malloc((numheappages+1)*PAGESIZE);
+ void *basemySpace = system_malloc((numheappages+1)*PAGESIZE);
void * pagealignedbase=PageAlignAddressUpward(basemySpace);
- mySpace = create_mspace_with_base(pagealignedbase, numheappages*PAGESIZE, 1 );
+ snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
if (!snapshotrecord)
createSharedMemory();
* @param theID is the snapshot identifier to rollback to.
*/
void rollBack( snapshot_id theID ){
+#if USE_MPROTECT_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, MYMALLOC, 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");