Re: insight crash

[Fernando Nasser <fnasser@redhat.com>]

Barry Branham wrote:
> 
> I recompiled gnomine with -g.  Insight again just starts with a blank source
> window - no menu bar, just the frame.  'ddd' opens it fine, however.
> 

At the bottom of the source window there are two comboboxes.  Do they
show
any files in there?

Do you have any ~/.gdbinit file around?

Another thing to try: delete your ~/.gdbtkinit file and see if it makes
any 
difference.


> Here's the result of running my application with Insight and then using regular
> gdb on the resulting Insight core with a longer backtrace - the  looping stack
> frame involves 'VkSimpleWindow' which is part of the Viewkit package I
> mentioned.  As noted in my first post, I was using Insight to debug this same
> program on RH 6.2 before I changed to RH7.0 and it worked.
> 

Now I am getting confused.  This is supposed to be a core dum of gdb
right?
It runs in one address space while your program, that gdb calls the
"inferior"
runs in another address space.  Gdb only sees your program's stack
because it
reads small chunks of inferior memory using system calls (ptrace).

Bottom line: you can't see the inferior programs stack in a core dump
from a 
gdb program.

Maybe this core dump is from your application.  The file command says it
is a 'gdb'
core file because your program was invoked through GDB (so the command
line where
it was started from was actually "gdb"). 

But this is just a theory.  And it does not explain why it works with
-nw.

Can you try the following:
gdb -x -nw /usr/local/bin/Dash
...
symbol-file /usr/local/bin/Dash

I saw once gdb dump core when rereading the symbols from a file.

It is quite hard to debug this things from afar.  I haven't seem any
behavior
like that before, so I depend on you running experiments.

Regards,
Fernando


> -------------------
> 
> [bhb@vger Dash]$ /usr/local/bin/gdb /usr/local/bin/Dash
> Segmentation fault (core dumped)
> [bhb@vger Dash]$ which gdb
> /usr/bin/gdb
> [bhb@vger Dash]$ file core
> core: ELF 32-bit LSB core file of 'gdb' (signal 11), Intel 80386, version 1
> [bhb@vger Dash]$ gdb /usr/local/bin/gdb core
> GNU gdb 5.0
> Copyright 2000 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "i386-redhat-linux"...
> Core was generated by `/usr/local/bin/gdb /usr/local/bin/Dash'.
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /usr/lib/libncurses.so.5...done.
> Loaded symbols for /usr/lib/libncurses.so.5
> Reading symbols from /usr/X11R6/lib/libX11.so.6...done.
> Loaded symbols for /usr/X11R6/lib/libX11.so.6
> Reading symbols from /lib/libdl.so.2...done.
> Loaded symbols for /lib/libdl.so.2
> Reading symbols from /lib/libm.so.6...done.
> Loaded symbols for /lib/libm.so.6
> Reading symbols from /lib/libc.so.6...done.
> Loaded symbols for /lib/libc.so.6
> Reading symbols from /lib/ld-linux.so.2...done.
> Loaded symbols for /lib/ld-linux.so.2
> Reading symbols from /lib/libthread_db.so.1...done.
> Loaded symbols for /lib/libthread_db.so.1
> #0  0x401cb245 in chunk_alloc (ar_ptr=0x0, nb=0) at malloc.c:2736
> 2736 malloc.c: No such file or directory.
> (gdb) bt
> #0  0x401cb245 in chunk_alloc (ar_ptr=0x0, nb=0) at malloc.c:2736
> #1  0x401cb08e in __libc_malloc (bytes=32) at malloc.c:2704
> #2  0x80d853a in xmmalloc (md=0x0, size=32) at utils.c:1024
> #3  0x80d85a8 in xmalloc (size=32) at utils.c:1059
> #4  0x8185274 in string_need (s=0xbf800290, n=16) at cplus-dem.c:4721
> #5  0x81853c5 in string_appendn (p=0xbf800290,
>     s=0x85759a8 "mainWindowWidget__C14VkSimpleWindow", n=16) at cplus-dem.c:4808
> #6  0x8184dc2 in demangle_function_name (work=0xbf8002d0, mangled=0xbf8002c4,
>     declp=0xbf800290, scan=0x85759b8 "__C14VkSimpleWindow") at cplus-dem.c:4558
> #7  0x8182963 in iterate_demangle_function (work=0xbf8002d0, mangled=0xbf8002c4,
>     declp=0xbf800290, scan=0x85759b8 "__C14VkSimpleWindow") at cplus-dem.c:2569
> #8  0x8182e5f in demangle_prefix (work=0xbf8002d0, mangled=0xbf8002c4,
> declp=0xbf800290)
>     at cplus-dem.c:2818
> #9  0x8180c80 in internal_cplus_demangle (work=0xbf8002d0,
>     mangled=0x85759a8 "mainWindowWidget__C14VkSimpleWindow") at cplus-dem.c:1108
> #10 0x8180971 in cplus_demangle (mangled=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     options=3) at cplus-dem.c:928
> #11 0x80960d8 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:587
> #12 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #13 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #14 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
> ---Type <return> to continue, or q <return> to quit---
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #15 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #16 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #17 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #18 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #19 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #20 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #21 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #22 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #23 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
> ---Type <return> to continue, or q <return> to quit---
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #24 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #25 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #26 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #27 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #28 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #29 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #30 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #31 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #32 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
> ---Type <return> to continue, or q <return> to quit---q
> block=Quit
> ) at symtab.c:595
> #33 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #34 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #35 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #36 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #37 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #38 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #39 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #40 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
>     at symtab.c:595
> #41 0x8096100 in lookup_symbol (name=0x85759a8
> "mainWindowWidget__C14VkSimpleWindow",
>     block=0x863ac6c, namespace=VAR_NAMESPACE, is_a_field_of_this=0x0, symtab=0x0)
> 
> ---Type <return> to continue, or q <return> to quit---q
>  at symtab.Quit
> (gdb) quit
> 
> ------------------
> Don't think there's much more to be gained by continuing here ;-)
> As I mentioned Insight churns for a while then segfaults.
> I'm running a PII 400 with 128Mb, kernel 2.2.16-22.  I'll be glad to send
> whatever other system info you can use.
> 
> Thanks
> Barry

-- 
Fernando Nasser
Red Hat Canada Ltd.                     E-Mail:  fnasser@redhat.com
2323 Yonge Street, Suite #300
Toronto, Ontario   M4P 2C9