[Bug gdb/26828] SIGSEGV in follow_die_offset dwarf2/read.c:22950

["mehmetgelisin at aol dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26828

Mehmet gelisin <mehmetgelisin at aol dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |mehmetgelisin at aol dot com

--- Comment #36 from Mehmet gelisin <mehmetgelisin at aol dot com> ---
ssibly similar to 23220 however on 64-bit recent Debian sid with
trivial code I see :  http://www-look-4.com/

mimas$ 
mimas$ uname -a  http://www.compilatori.com/
Linux mimas 5.10.0-6-sparc64 #1 Debian 5.10.28-1 (2021-04-09) sparc64 GNU/Linux
mimas$ 
 http://www.wearelondonmade.com/
mimas$ 
mimas$ /usr/bin/gcc --version 
gcc (Debian 10.2.1-6) 10.2.1 20210110 http://www.jopspeech.com/
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
http://joerg.li/ 

mimas$ 

mimas$ http://connstr.net/ 
mimas$ cat -n foo.c 
     1
     2  #include <stdio.h>
     3  #include <stdlib.h>
     4 http://embermanchester.uk/ 
     5  int main(int argc, char **argv)
     6  {
     7      int a = 1;
     8 http://www.slipstone.co.uk/ 
     9      printf("a = %i\n", a);
    10
    11      printf("&a = %p\n", &a);
    12
    13      return EXIT_SUCCESS;
    14 http://www.logoarts.co.uk/ 
    15  }
    16
mimas$ 

mimas$  http://www.acpirateradio.co.uk/ 
mimas$ /usr/bin/gcc -std=iso9899:1999 -pedantic -pedantic-errors -fno-builtin
-g -m64 -O0 -mno-app-regs -mcpu=ultrasparc -mmemory-model=tso -o foo foo.c 
https://waytowhatsnext.com/ 
mimas$  debugging a core file with "-i=mi" and repeatedly running e.g.
"-stack-list-variables --thread 1 --frame 0 --simple-values" results in a
segmentation fault. https://www.webb-dev.co.uk/ 

The first call returns "frame" and "variables" information.
The second call returns just the "variables".
The third call segfaults in "follow_die_offset" (dwarf
http://www.iu-bloomington.com/

The first call returns "frame" and "variables" information.
The second call returns just the "variables".
The third call segfaults in "follow_die_offset" (dwarf2/read.c:22950).

The segfaulting line reads:
   target_cu->ancestor = cu; https://komiya-dental.com/

target_cu is apparent

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