Your message dated Mon, 04 Aug 2025 13:41:13 -0400
with message-id <[email protected]>
and subject line Closing bug
has caused the Debian Bug report #624465,
regarding gdb shows incorrect prototype in backtrace when using GCC's cleanup
attribute
to be marked as done.
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--
624465: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624465
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: gdb
Version: 7.2-1
Severity: normal
gdb shows incorrect prototype in backtrace when using GCC's cleanup
attribute. Here's a simple example:
------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
int fct (int *x, int y, int z)
{
void log_cleanup (int *time)
{
fprintf (stderr, "x=%d\n", *x);
}
int log_time __attribute__ ((cleanup (log_cleanup)));
*x = y;
abort ();
return 0;
}
int main (void)
{
int x;
fct (&x, 17, 1);
return 0;
}
------------------------------------------------------------
$ gcc -Wall -g tst.c -o tst
$ gdb ./tst
GNU gdb (GDB) 7.2-debian
Copyright (C) 2010 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".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/vlefevre/tst...done.
(gdb) run
Starting program: /home/vlefevre/tst
Program received signal SIGABRT, Aborted.
0x00007ffff7aaf165 in raise (sig=<value optimized out>)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) bt
#0 0x00007ffff7aaf165 in raise (sig=<value optimized out>)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007ffff7ab1f70 in abort () at abort.c:92
#2 0x00000000004005d9 in fct (y=17, z=1) at tst.c:13
#3 0x00000000004005f7 in main () at tst.c:21
One can see that the x is absent from fct in #2.
-- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.38-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages gdb depends on:
ii gdbserver 7.2-1 The GNU Debugger (remote server)
ii libc6 2.11.2-13 Embedded GNU C Library: Shared lib
ii libexpat1 2.0.1-7 XML parsing C library - runtime li
ii libncurses5 5.9-1 shared libraries for terminal hand
ii libpython2.6 2.6.6-10 Shared Python runtime library (ver
ii libreadline6 6.2-1 GNU readline and history libraries
ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime
gdb recommends no packages.
Versions of packages gdb suggests:
ii gdb-doc 7.2-1 The GNU Debugger Documentation
-- no debconf information
--- End Message ---
--- Begin Message ---
I can't reproduce this on GDB 16.3:
--8<---------------cut here---------------start------------->8---
(gdb) bt
#0 0x00007ffff7e5995c in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007ffff7e04cc2 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007ffff7ded4ac in abort () from /lib/x86_64-linux-gnu/libc.so.6
#3 0x0000555555555169 in fct (x=0x7fffffffeaac, y=17, z=1) at 1.c:13
#4 0x0000555555555187 in main () at 1.c:21
--8<---------------cut here---------------end--------------->8---
Closing the bug.
--
Sergio
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