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[Xen-devel] xentop segfault -- xenstat_domain_name returning a null poin

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] xentop segfault -- xenstat_domain_name returning a null pointer?
From: Charles Duffy <cduffy@xxxxxxxxxxx>
Date: 2005年11月13日 20:55:40 -0600
Delivery-date: 2005年11月14日 03:04:02 +0000
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# 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ドル = 0
(gdb) print xenstat_domain_name(domain2)
6ドル = 5393056
(gdb) print (char*)xenstat_domain_name(domain2)
7ドル = 0x524aa0 "demo-1"
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