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

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a mysterious crash.

Sponsored by: Netflix
This commit is contained in:
Warner Losh 2017-12-15 23:16:47 +00:00
parent 328884aef7
commit 9a7c084993
1 changed files with 3 additions and 0 deletions
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3
stand/libsa/sbrk.c
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@ -52,6 +52,9 @@ sbrk(int incr)
{ {
char *ret; char *ret;
if (heapbase == 0)
panic("No heap setup\n");
if ((heapsize + incr) <= maxheap) { if ((heapsize + incr) <= maxheap) {
ret = (char *)heapbase + heapsize; ret = (char *)heapbase + heapsize;
bzero(ret, incr); bzero(ret, incr);