modify trap.c of proc time update

kernel/trap.c

@@ -92,8 +92,10 @@ usertrap(void)
     exit(-1);
 
   // give up the CPU if this is a timer interrupt.
-  if(which_dev == 2)
+  if(which_dev == 2){
+    p->utime++;
     yield();
+  }
 
   usertrapret();
 }
@@ -171,6 +173,7 @@ kerneltrap() {
   
   // give up the CPU if this is a timer interrupt.
   if(which_dev == 2 && myproc() != 0 && myproc()->state == RUNNING) {
+    myproc()->stime++;
     yield();
   }
   // the yield() may have caused some traps to occur,