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From: "terra at gnome dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/105960] New: Crash in 32-bit mode
Date: Mon, 13 Jun 2022 19:54:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105960

            Bug ID: 105960
           Summary: Crash in 32-bit mode
           Product: gcc
           Version: 12.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: terra at gnome dot org
  Target Milestone: ---

Created attachment 53130
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53130&action=3Dedit
Source files and compile script

The attached archive shows a crash when running 32-bit binaries compiled wi=
th
gcc 12.1

I am preliminarily blaming the C compiler.




0. Unpack tar file

1. Edit "compile" to point at the desired compiler

2. ./compile

3. ./crash32

Expected: immediate return
Observed: Segmentation fault (core dumped)

(gdb) where
#0  0xf7fc73d0 in *ABS*@plt () from /home/welinder/crash32/liboink32.so
#1  0x0804841d in main ()


Observations (probably more "anecdote" than "data"):

* Doesn't happen in 64-bit mode
* Doesn't happen without optimization
* The shared library appears to be a required part
* The use target_clones appears to be a required part
* This did not happen with gcc 11.1


# uname -a
Linux xxxxxxxxxx 5.3.18-150300.59.63-default #1 SMP Tue Apr 5 12:47:31 UTC =
2022
(d77db66) x86_64 x86_64 x86_64 GNU/Linux


# /usr/local/products/gcc/12.1.0/bin/gcc --version
gcc (GCC) 12.1.0
Copyright (C) 2022 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.=