https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118198
Bug ID: 118198
Summary: GCC wrong debug information bug
Product: gcc
Version: 14.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: imchuncai at gmail dot com
Target Milestone: ---
Created attachment 59970
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59970&action=edit
the preprocessed file
1. the exact version of GCC
gcc version 14.2.1 20240912 (Red Hat 14.2.1-3) (GCC)
2. the system type
x86_64-redhat-linux
3. the options given when GCC was configured/built
gcc -std=gnu23 -O3 -g -Wall -Wextra -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -fsanitize=undefined main.c
4. the complete command line that triggers the bug;
./a.out
gdb a.out
5. the compiler output (error messages, warnings, etc.)
the first run is fine, the second run will crash, and the debug info shows as
follow:
#0 __pthread_kill_implementation (threadid=<optimized out>,
signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1 0x00007ffff76a86d3 in __pthread_kill_internal (threadid=<optimized out>,
signo=6) at pthread_kill.c:78
#2 0x00007ffff764fc4e in __GI_raise (sig=sig@entry=6)
at ../sysdeps/posix/raise.c:26
#3 0x00007ffff7637902 in __GI_abort () at abort.c:79
#4 0x00000000004010b5 in must (x=<optimized out>) at main.c:9
#5 main () at main.c:41
6. what is wrong
the actual crash is occurred at line 47, which is address is already in use.
