https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95865
Bug ID: 95865
Summary: Wrong line information at Og
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: massarelli at diag dot uniroma1.it
Target Milestone: ---
$ cat a.c
int g_4 = 3, a;
int *b() {
if (g_4)
return &g_4; //line 4
a = 0;
return &g_4; //line 6
}
$ cat -n a.c
1 int g_4 = 3, a;
2 int *b() {
3 if (g_4)
4 return &g_4; //line 4
5 a = 0;
6 return &g_4; //line 6
7 }
8 int main() { b(); }
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --prefix=/tmp/gcc_build --disable-multilib
--enable-languages=c,c++
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.0 20200619 (experimental) (GCC)
$ gdb -v
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
$ gcc -Og -g -o out a.c
$ gdb out
Reading symbols from out...done.
(gdb) b main
Breakpoint 1 at 0x40049f: file a.c, line 8.
(gdb) r
Starting program: out
Breakpoint 1, main () at a.c:8
8 int main() { b(); }
(gdb) s
b () at a.c:3
3 if (g_4)
(gdb) p g_4
$1 = 3
(gdb) s
6 return &g_4; //line 6
(gdb) s
0x00007ffff7a05b97 in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
(gdb)
