/* Primary struct for snapshotting system */
struct mprot_snapshotter {
mprot_snapshotter(unsigned int numbackingpages, unsigned int numsnapshots, unsigned int nummemoryregions);
+ ~mprot_snapshotter();
struct MemoryRegion *regionsToSnapShot; //This pointer references an array of memory regions to snapshot
snapshot_page_t *backingStore; //This pointer references an array of snapshotpage's that form the backing store
snapShots = (struct SnapShotRecord *)model_malloc(sizeof(struct SnapShotRecord) * snapshots);
}
+mprot_snapshotter::~mprot_snapshotter()
+{
+ model_free(regionsToSnapShot);
+ model_free(backingStoreBasePtr);
+ model_free(backingRecords);
+ model_free(snapShots);
+}
+
/** mprot_handle_pf is the page fault handler for mprotect based snapshotting
* algorithm.
*/
void *basemySpace = model_malloc((numheappages + 1) * PAGESIZE);
void *pagealignedbase = PageAlignAddressUpward(basemySpace);
user_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
- addMemoryRegionToSnapShot(pagealignedbase, numheappages);
+ snapshot_add_memory_region(pagealignedbase, numheappages);
void *base_model_snapshot_space = model_malloc((numheappages + 1) * PAGESIZE);
pagealignedbase = PageAlignAddressUpward(base_model_snapshot_space);
model_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
- addMemoryRegionToSnapShot(pagealignedbase, numheappages);
+ snapshot_add_memory_region(pagealignedbase, numheappages);
entryPoint();
}
#endif /* !USE_MPROTECT_SNAPSHOT */
-/** The initSnapshotLibrary function initializes the snapshot library.
- * @param entryPoint the function that should run the program.
+/**
+ * @brief Initializes the snapshot system
+ * @param entryPoint the function that should run the program.
*/
-void initSnapshotLibrary(unsigned int numbackingpages,
+void snapshot_system_init(unsigned int numbackingpages,
unsigned int numsnapshots, unsigned int nummemoryregions,
unsigned int numheappages, VoidFuncPtr entryPoint)
{
#endif
}
-/** The addMemoryRegionToSnapShot function assumes that addr is page aligned. */
-void addMemoryRegionToSnapShot(void *addr, unsigned int numPages)
+/** Assumes that addr is page aligned. */
+void snapshot_add_memory_region(void *addr, unsigned int numPages)
{
#if USE_MPROTECT_SNAPSHOT
mprot_add_to_snapshot(addr, numPages);
#endif
}
-/** The takeSnapshot function takes a snapshot.
+/** Takes a snapshot of memory.
* @return The snapshot identifier.
*/
-snapshot_id takeSnapshot()
+snapshot_id take_snapshot()
{
#if USE_MPROTECT_SNAPSHOT
return mprot_take_snapshot();
#endif
}
-/** The rollBack function rollback to the given snapshot identifier.
+/** Rolls the memory state back to the given snapshot identifier.
* @param theID is the snapshot identifier to rollback to.
*/
-void rollBack(snapshot_id theID)
+void snapshot_roll_back(snapshot_id theID)
{
#if USE_MPROTECT_SNAPSHOT
mprot_roll_back(theID);