Author: emaste
Date: Wed Sep 22 19:41:01 2010
New Revision: 213013
URL: http://svn.freebsd.org/changeset/base/213013
Log:
Move test for zero bufp or size before rseq and wseq calculation. This
avoids spinning in an infinite loop for some (possibly corrupt?) core
files at work.
Modified:
head/gnu/usr.bin/gdb/kgdb/main.c
Modified: head/gnu/usr.bin/gdb/kgdb/main.c
==============================================================================
--- head/gnu/usr.bin/gdb/kgdb/main.c Wed Sep 22 19:26:41 2010
(r213012)
+++ head/gnu/usr.bin/gdb/kgdb/main.c Wed Sep 22 19:41:01 2010
(r213013)
@@ -222,11 +222,13 @@ kgdb_dmesg(void)
return;
bufp = kgdb_parse("msgbufp->msg_ptr");
size = (int)kgdb_parse("msgbufp->msg_size");
+ if (bufp == 0 || size == 0)
+ return;
rseq = (int)kgdb_parse("msgbufp->msg_rseq");
wseq = (int)kgdb_parse("msgbufp->msg_wseq");
rseq = MSGBUF_SEQ_TO_POS(size, rseq);
wseq = MSGBUF_SEQ_TO_POS(size, wseq);
- if (bufp == 0 || size == 0 || rseq == wseq)
+ if (rseq == wseq)
return;
printf("\nUnread portion of the kernel message buffer:\n");
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