X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttv%2Flttv%2Ftraceset-process.c;h=dc45b17d3a88c043f23f5bdfed06ceae150b7f4f;hb=993046ef12d5b804119ef2f742cb7fa2f9835218;hp=54a68c07777d85e891b305352342dbd96a953803;hpb=58b4e4ae6fe118dbf6b441692eae833df2229d3e;p=lttv.git

diff --git a/lttv/lttv/traceset-process.c b/lttv/lttv/traceset-process.c
index 54a68c07..dc45b17d 100644
--- a/lttv/lttv/traceset-process.c
+++ b/lttv/lttv/traceset-process.c
@@ -74,7 +74,7 @@ guint lttv_process_traceset_middle(LttvTraceset *traceset,
 
 		if((bt_event = bt_ctf_iter_read_event(traceset->iter)) != NULL) {
 
-			LttTime time = ltt_time_from_uint64(bt_ctf_get_timestamp_raw(bt_event));
+			LttTime time = ltt_time_from_uint64(bt_ctf_get_timestamp(bt_event));
 			if(ltt_time_compare(end, time) <= 0) {
 				break;
 			}
@@ -238,8 +238,13 @@ guint lttv_process_traceset_seek_n_backward(LttvTraceset *ts,
         guint i, count, ret;
         gint extraEvent = 0;
         guint64 initialTimeStamp, previousTimeStamp;
-        LttvTracesetPosition *initialPos, *previousPos, *currentPos;
-        
+        LttvTracesetPosition *initialPos, *previousPos, *currentPos, beginPos;
+        struct bt_iter_pos pos;
+        beginPos.bt_pos = &pos;
+        beginPos.iter = ts->iter;
+        beginPos.bt_pos->type = BT_SEEK_BEGIN;
+        beginPos.timestamp = G_MAXUINT64;
+        beginPos.cpu_id = INT_MAX;
         /*Save initial position of the traceset*/
         initialPos = lttv_traceset_create_current_position (ts);
         
@@ -258,22 +263,39 @@ guint lttv_process_traceset_seek_n_backward(LttvTraceset *ts,
 			break;
                 
                 currentPos = lttv_traceset_create_time_position(ts,ltt_time_from_uint64(previousTimeStamp));
+                /*Corner case: When we are near the beginning of the trace and the previousTimeStamp is before
+                        * the beginning of the trace. We have to seek to the first event.
+                        */
+                if((lttv_traceset_position_compare(currentPos,&beginPos ) == 0)){
+                                lttv_traceset_seek_to_position(&beginPos);
+                                break;
+                        }
                 /*move traceset position */
                 lttv_state_traceset_seek_position(ts, previousPos);
                 /* iterate to the initial position counting the number of event*/
                 count = 0;
                 do {
                         if((ret = lttv_traceset_position_compare(currentPos,initialPos)) == 1){       
-                                bt_iter_next(bt_ctf_get_iter(ts->iter));
-                                lttv_traceset_destroy_position(currentPos);
-                                currentPos = lttv_traceset_create_current_position(ts);
-                                count++;
+				if(bt_iter_next(bt_ctf_get_iter(ts->iter)) == 0) {
+					if(bt_ctf_iter_read_event(ts->iter) != NULL) {
+					lttv_traceset_destroy_position(currentPos);
+					currentPos = lttv_traceset_create_current_position(ts);
+					count++;
+					} else  {
+						break;
+					}
+					
+				} else {
+
+					//No more event available
+					break;
+				}
                         }
                 }while(ret != 0);
-                lttv_traceset_destroy_position(currentPos);
+                
                 /*substract the desired number of event to the count*/
                 extraEvent = count - n;
-                if(extraEvent >= 0){
+                if (extraEvent >= 0) {
                         //if the extraEvent is over 0 go back to previousPos and 
                         //move forward the value of extraEvent times
                         lttv_state_traceset_seek_position(ts, previousPos);
@@ -287,9 +309,11 @@ guint lttv_process_traceset_seek_n_backward(LttvTraceset *ts,
                         }
                         break; /* we successfully seeked backward */
                 }
-                else{ /* if the extraEvent is below 0 create a position before and start over*/  
-                        ratio = ratio * 16;
+                else{ 
+                        /* if the extraEvent is below 0 create a position before and start over*/  
+			ratio = ratio * 16;
                 }
+                lttv_traceset_destroy_position(currentPos);
         }
         return 0;
 }