From mboxrd@z Thu Jan 1 00:00:00 1970 From: Charles Duffy Subject: xentop segfault -- xenstat_domain_name returning a null pointer? Date: Sun, 13 Nov 2005 20:55:40 -0600 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org # xm list Name ID Mem(MiB) VCPUs State Time(s) Domain-0 0 512 1 r----- 41.8 demo-1 1 1024 1 -b---- 23.5 demo-2 2 1024 1 -b---- 23.1 demo-db 3 2048 1 -b---- 18.3 demo-vnc 4 768 1 -b---- 8.2 # gdb ./xentop ... (gdb) run Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 16384 (LWP 9196)] 0x00002aaaaae9253f in strcasecmp () from /lib/libc.so.6 (gdb) bt #0 0x00002aaaaae9253f in strcasecmp () from /lib/libc.so.6 #1 0x0000000000401f51 in compare_name (domain1=0x5248d0, domain2=0x524920) at xentop.c:351 #2 0x0000000000401f1e in compare_domains (domain1=0x524a70, domain2=0x524a78) at xentop.c:343 #3 0x00002aaaaae541ed in bsearch () from /lib/libc.so.6 #4 0x00002aaaaae540e4 in bsearch () from /lib/libc.so.6 #5 0x00002aaaaae543c9 in qsort () from /lib/libc.so.6 #6 0x00000000004030aa in top () at xentop.c:788 #7 0x0000000000403346 in main (argc=1, argv=0x7fffffe4dd38) at xentop.c:873 (gdb) up #1 0x0000000000401f51 in compare_name (domain1=0x5248d0, domain2=0x524920) at xentop.c:351 351 return strcasecmp(xenstat_domain_name(domain1), xenstat_domain_name(domain2)); (gdb) print xenstat_domain_name(domain1) $5 = 0 (gdb) print xenstat_domain_name(domain2) $6 = 5393056 (gdb) print (char*)xenstat_domain_name(domain2) $7 = 0x524aa0 "demo-1"