X-Git-Url: http://plrg.eecs.uci.edu/git/?p=model-checker.git;a=blobdiff_plain;f=snapshot-interface.cc;h=5d160e1a837da27677bf441efcdc956e8af8a687;hp=4def5c88c56d7baa2e1f44bec06c9680671a4779;hb=9c24e6ba4e89dfc1a6f0f23908510a3c1224b8d0;hpb=d6c724c262800ef1fedf964e18c44b8c423de63f

diff --git a/snapshot-interface.cc b/snapshot-interface.cc
index 4def5c8..5d160e1 100644
--- a/snapshot-interface.cc
+++ b/snapshot-interface.cc
@@ -11,16 +11,68 @@
 #include <vector>
 #include <utility>
 #include <inttypes.h>
-
 #include "common.h"
 
+
 #define MYBINARYNAME "model"
 #define MYLIBRARYNAME "libmodel.so"
 #define MAPFILE_FORMAT "/proc/%d/maps"
 
 SnapshotStack * snapshotObject;
 
-void SnapshotGlobalSegments(){
+#ifdef MAC
+/** The SnapshotGlobalSegments function computes the memory regions
+ *	that may contain globals and then configures the snapshotting
+ *	library to snapshot them.
+ */
+static void SnapshotGlobalSegments(){
+	int pid = getpid();
+	char buf[9000], execname[100];
+	FILE *map;
+
+	sprintf(execname, "vmmap -interleaved %d", pid);
+	map=popen(execname, "r");
+
+	if (!map) {
+		perror("popen");
+		exit(EXIT_FAILURE);
+	}
+
+	/* Wait for correct part */
+	while (fgets(buf, sizeof(buf), map)) {
+		if (strstr(buf, "==== regions for process"))
+			break;
+	}
+
+	while (fgets(buf, sizeof(buf), map)) {
+		char regionname[200] = "";
+		char type[23];
+		char smstr[23];
+		char r, w, x;
+		char mr, mw, mx;
+		int size;
+		void *begin, *end;
+
+		//Skip out at the end of the section
+		if (buf[0]=='\n')
+			break;
+
+		sscanf(buf, "%22s %p-%p [%5dK] %c%c%c/%c%c%c SM=%3s %200s\n", type, &begin, &end, &size, &r, &w, &x, &mr, &mw, &mx, smstr, regionname);
+
+		if (w == 'w' && (strstr(regionname, MYBINARYNAME) || strstr(regionname, MYLIBRARYNAME))) {
+			size_t len = ((uintptr_t)end - (uintptr_t)begin) / PAGESIZE;
+			if (len != 0)
+				addMemoryRegionToSnapShot(begin, len);
+		}
+	}
+	pclose(map);
+}
+#else
+/** The SnapshotGlobalSegments function computes the memory regions
+ *	that may contain globals and then configures the snapshotting
+ *	library to snapshot them.
+ */
+static void SnapshotGlobalSegments(){
 	int pid = getpid();
 	char buf[9000], filename[100];
 	FILE *map;
@@ -46,9 +98,8 @@ void SnapshotGlobalSegments(){
 	}
 	fclose(map);
 }
+#endif
 
-//class definition of SnapshotStack.....
-//declaration of constructor....
 SnapshotStack::SnapshotStack(){
 	SnapshotGlobalSegments();
 	stack=NULL;
@@ -57,6 +108,13 @@ SnapshotStack::SnapshotStack(){
 SnapshotStack::~SnapshotStack(){
 }
 
+
+/** This method returns to the last snapshot before the inputted
+ * sequence number.  This function must be called from the model
+ * checking thread and not from a snapshotted stack.
+ * @param seqindex is the sequence number to rollback before.
+ * @return is the sequence number we actually rolled back to.
+ */
 int SnapshotStack::backTrackBeforeStep(int seqindex) {
 	while(true) {
 		if (stack->index<=seqindex) {
@@ -70,6 +128,7 @@ int SnapshotStack::backTrackBeforeStep(int seqindex) {
 	}
 }
 
+/** This method takes a snapshot at the given sequence number. */
 void SnapshotStack::snapshotStep(int seqindex) {
 	struct stackEntry *tmp=(struct stackEntry *)MYMALLOC(sizeof(struct stackEntry));
 	tmp->next=stack;