X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=snapshot.cc;h=fb00d1511c8505df3c34fc22eaa0b7adad838937;hb=6b87c110fbda87ccec4f58b1e292d5f9434c8691;hp=59aad7220dc2388d2337f30cedb4584ecd6720e8;hpb=99928ab8d61239d499f5bf45ae9a2b41595350f8;p=model-checker.git

diff --git a/snapshot.cc b/snapshot.cc
index 59aad72..fb00d15 100644
--- a/snapshot.cc
+++ b/snapshot.cc
@@ -30,6 +30,13 @@
 /* extern declaration definition */
 struct SnapShot * snapshotrecord = NULL;
 
+/** PageAlignedAdressUpdate return a page aligned address for the
+ * address being added as a side effect the numBytes are also changed.
+ */
+static void * PageAlignAddressUpward(void * addr) {
+	return (void *)((((uintptr_t)addr)+PAGESIZE-1)&~(PAGESIZE-1));
+}
+
 #if !USE_MPROTECT_SNAPSHOT
 /** @statics
 *   These variables are necessary because the stack is shared region and
@@ -48,13 +55,6 @@ static snapshot_id snapshotid = 0;
 
 #else /* USE_MPROTECT_SNAPSHOT */
 
-/** PageAlignedAdressUpdate return a page aligned address for the
- * address being added as a side effect the numBytes are also changed.
- */
-static void * PageAlignAddressUpward(void * addr) {
-	return (void *)((((uintptr_t)addr)+PAGESIZE-1)&~(PAGESIZE-1));
-}
-
 /** ReturnPageAlignedAddress returns a page aligned address for the
  * address being added as a side effect the numBytes are also changed.
  */
@@ -88,6 +88,8 @@ static void HandlePF( int sig, siginfo_t *si, void * unused){
 	if( si->si_code == SEGV_MAPERR ){
 		printf("Real Fault at %p\n", si->si_addr);
 		print_trace();
+		printf("For debugging, place breakpoint at: %s:%d\n",
+				__FILE__, __LINE__);
 		exit( EXIT_FAILURE );
 	}
 	void* addr = ReturnPageAlignedAddress(si->si_addr);
@@ -174,6 +176,12 @@ void initSnapshotLibrary(unsigned int numbackingpages,
 	void * pagealignedbase=PageAlignAddressUpward(basemySpace);
 	user_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
 	addMemoryRegionToSnapShot(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);
+
 	entryPoint();
 }
 #else
@@ -183,6 +191,10 @@ void initSnapshotLibrary(unsigned int numbackingpages,
 	if (!snapshotrecord)
 		createSharedMemory();
 
+	void *base_model_snapshot_space = malloc((numheappages + 1) * PAGESIZE);
+	void *pagealignedbase = PageAlignAddressUpward(base_model_snapshot_space);
+	model_snapshot_space = create_mspace_with_base(pagealignedbase, numheappages * PAGESIZE, 1);
+
 	//step 2 setup the stack context.
 	ucontext_t newContext;
 	getcontext( &newContext );