//remember where to copy page back to
snapshotrecord->backingRecords[backingpage].basePtrOfPage=addr;
//set protection to read/write
- mprotect( addr, sizeof(struct SnapShotPage), PROT_READ | PROT_WRITE );
+ if (mprotect( addr, sizeof(struct SnapShotPage), PROT_READ | PROT_WRITE )) {
+ perror("mprotect");
+ // Handle error by quitting?
+ }
#endif //nothing to handle for non snapshotting case.
}
exit(-1);
}
initSnapShotRecord(numbackingpages, numsnapshots, nummemoryregions);
- mySpace = create_mspace( numheappages*PAGESIZE, 1 );
- addMemoryRegionToSnapShot(mySpace, numheappages);
+
+ basemySpace=MYMALLOC((numheappages+1)*PAGESIZE);
+ void * pagealignedbase=(void *)((((uintptr_t)basemySpace)+PAGESIZE-1)&~(PAGESIZE-1));
+ mySpace = create_mspace_with_base(pagealignedbase, numheappages*PAGESIZE, 1 );
+ addMemoryRegionToSnapShot(pagealignedbase, numheappages);
entryPoint();
#else
//add a signal to indicate that the process is going to terminate.
#if USE_CHECKPOINTING
for(unsigned int region=0; region<snapshotrecord->lastRegion;region++) {
if( mprotect(snapshotrecord->regionsToSnapShot[region].basePtr, snapshotrecord->regionsToSnapShot[region].sizeInPages*sizeof(struct SnapShotPage), PROT_READ ) == -1 ){
+ perror("mprotect");
printf("Failed to mprotect inside of takeSnapShot\n");
exit(-1);
}
std::map< void *, bool, std::less< void * >, MyAlloc< std::pair< const void *, bool > > > 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");
printf("Failed to mprotect inside of takeSnapShot\n");
exit(-1);
}