Panic in sbrk if setheap hasn't been called yet. This is preferable to

a mysterious crash. Sponsored by: Netflix
2017-12-15 23:16:47 +00:00 · 2017-12-15 23:16:47 +00:00 · f67f1d6d70
commit f67f1d6d70
parent cbd72f6554
1 changed files with 3 additions and 0 deletions
--- a/stand/libsa/sbrk.c
+++ b/stand/libsa/sbrk.c
@ -52,6 +52,9 @@ sbrk(int incr)
 {
    char	*ret;
    
+    if (heapbase == 0)
+	    panic("No heap setup\n");
+
    if ((heapsize + incr) <= maxheap) {
 	ret = (char *)heapbase + heapsize;
 	bzero(ret, incr);