X-Git-Url: http://plrg.eecs.uci.edu/git/?p=cdsspec-compiler.git;a=blobdiff_plain;f=snapshot-interface.cc;h=51fe2f08de1392dd6fe40cd3757edcf675367c60;hp=baedf4753a806b5ac47b8079f9227dba4bce3706;hb=826d667b8d232223d7418f5614a8e30e9ce74c89;hpb=cf7518cb8c2d9cd3033ca7540ea9dc448b21912a

diff --git a/snapshot-interface.cc b/snapshot-interface.cc
index baedf47..51fe2f0 100644
--- a/snapshot-interface.cc
+++ b/snapshot-interface.cc
@@ -3,7 +3,6 @@
 #include <iostream>
 #include <fstream>
 #include <unistd.h>
-#include <sys/types.h>
 #include <sstream>
 #include <cstring>
 #include <string>
@@ -13,10 +12,11 @@
 #include <inttypes.h>
 #include "common.h"
 
-
+/* MYBINARYNAME only works because our pathname usually includes 'model' (e.g.,
+ * /.../model-checker/test/userprog.o) */
 #define MYBINARYNAME "model"
 #define MYLIBRARYNAME "libmodel.so"
-#define MAPFILE_FORMAT "/proc/%d/maps"
+#define MAPFILE "/proc/self/maps"
 
 SnapshotStack * snapshotObject;
 
@@ -56,46 +56,53 @@ static void SnapshotGlobalSegments(){
 		//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);
+
+		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);
-			DEBUG("%s\n", buf);
-			DEBUG("%45s: %18p - %18p\t%c%c%c%c\n", regionname, begin, end, r, w, x, p);
 		}
 	}
 	pclose(map);
 }
 #else
+
+static void get_binary_name(char *buf, size_t len)
+{
+	if (readlink("/proc/self/exe", buf, len) == -1) {
+		perror("readlink");
+		exit(EXIT_FAILURE);
+	}
+}
+
 /** 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];
+	char buf[9000];
+	char binary_name[800];
 	FILE *map;
 
-	sprintf(filename, MAPFILE_FORMAT, pid);
-	map = fopen(filename, "r");
+	map = fopen(MAPFILE, "r");
 	if (!map) {
 		perror("fopen");
 		exit(EXIT_FAILURE);
 	}
+	get_binary_name(binary_name, sizeof(binary_name));
 	while (fgets(buf, sizeof(buf), map)) {
 		char regionname[200] = "";
 		char r, w, x, p;
 		void *begin, *end;
 
 		sscanf(buf, "%p-%p %c%c%c%c %*x %*x:%*x %*u %200s\n", &begin, &end, &r, &w, &x, &p, regionname);
-		if (w == 'w' && (strstr(regionname, MYBINARYNAME) || strstr(regionname, MYLIBRARYNAME))) {
+		if (w == 'w' && (strstr(regionname, binary_name) || strstr(regionname, MYLIBRARYNAME))) {
 			size_t len = ((uintptr_t)end - (uintptr_t)begin) / PAGESIZE;
 			if (len != 0)
 				addMemoryRegionToSnapShot(begin, len);
-			DEBUG("%45s: %18p - %18p\t%c%c%c%c\n", regionname, begin, end, r, w, x, p);
+			DEBUG("%55s: %18p - %18p\t%c%c%c%c\n", regionname, begin, end, r, w, x, p);
 		}
 	}
 	fclose(map);
@@ -113,11 +120,10 @@ 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.  
+ * 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) {
@@ -126,16 +132,14 @@ int SnapshotStack::backTrackBeforeStep(int seqindex) {
 			return stack->index;
 		}
 		struct stackEntry *tmp=stack;
-		MYFREE(tmp);
 		stack=stack->next;
+		model_free(tmp);
 	}
 }
 
-/** This method takes a snapshot at the given sequence number.
- */
-
+/** This method takes a snapshot at the given sequence number. */
 void SnapshotStack::snapshotStep(int seqindex) {
-	struct stackEntry *tmp=(struct stackEntry *)MYMALLOC(sizeof(struct stackEntry));
+	struct stackEntry *tmp=(struct stackEntry *)model_malloc(sizeof(struct stackEntry));
 	tmp->next=stack;
 	tmp->index=seqindex;
 	tmp->snapshotid=takeSnapshot();