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segmentation fault
- From: John <johnw822003 at yahoo dot com>
- To: gdb at sources dot redhat dot com
- Date: Thu, 10 Jun 2004 14:08:02 -0700 (PDT)
- Subject: segmentation fault
Hi all:
?
I encounter a segmentation fault probelm. When I use
"gdb core", gdb shows that the program stops at?the
following?line of my code:
sprintf(pt_->buffer() + offset,
?
I think that line cause segmentation fault.
I want to set a breakpoint at that line and run the
code to see what happens before segmetation fault. How
can I make the program stop right before segmentation
fault happens?
I also attach some information from gdb.?
?
Thanks a lot.
?
John
?
---------------------------------------------------------------------------------
Loaded symbols for /lib/ld-linux.so.2
#0? 0x4026ecef in vfprintf () from /lib/libc.so.6
(gdb) bt
#0? 0x4026ecef in vfprintf () from /lib/libc.so.6
#1? 0xbfffdd04 in ?? ()
#2? 0x40286fcb in vsprintf () from /lib/libc.so.6
#3? 0x4027492d in sprintf () from /lib/libc.so.6
#4? 0x0812226b in CMUTrace::format_mac_common(Packet*,
char const*, int) (this=0x97528b8, p=0x12ef75a0,
why=0x82cc85c "---", offset=0)
??? at trace/cmu-trace.cc:228
?.........
?
(gdb) frame 4
#4? 0x0812226b in CMUTrace::format_mac_common(Packet*,
char const*, int) (this=0x97528b8, p=0x12ef75a0,
why=0x82cc85c "---", offset=0)
??? at trace/cmu-trace.cc:228
228???????????? sprintf(pt_->buffer() + offset,
Current language:? auto; currently c++
(gdb)
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