gdb "Core was generated by" truncated to 80 characters

[Not sure if this got through to [email protected]  so resending]

Hello

Just noticed my command line args of a core file are truncated, so it's hard to reproduce the crash as I don't know what 
the core was generated from.

"Core was generated by" truncated to 80 characters in the below example.

May I ask, is this a limitation of the kernel dump or gdb? When i use 'strings' I see the core does contain the full 
command line.

Sorry I know my gdb isn't the latest, it's Ubuntu LTS

I tried setting .gdbinit 'set width unlimited'
but the output is still truncated.

Example below

// gcc-8 -Wall -o signal signal.c


#include <signal.h>

int main()
{
raise(SIGTRAP);
return 0;
}




$ ./signal 
myverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglongfz
Trace/breakpoint trap (core dumped)
$
$ gdb -c core signal
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from signal...(no debugging symbols found)...done.
[New LWP 27437]
Core was generated by `./signal myverylonglonglongmyverylonglonglongmyverylonglonglongmyverylonglonglo'.
Program terminated with signal SIGTRAP, Trace/breakpoint trap.
#0 __GI_raise (sig=<optimised out>) at ../sysdeps/unix/sysv/linux/raise.c:51
51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) q