https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108963
Bug ID: 108963
Summary: ASAN produces wrong line number in the report
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: shaohua.li at inf dot ethz.ch
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at
gcc dot gnu.org
Target Milestone: ---
For the following code, ASAN at -O1 and above always produces the wrong line
number. I've found quite some cases that have this issue.
Compiler explorer: https://godbolt.org/z/hscP9T78M
% cat a.c
union a {
int b;
};
char c;
int d;
static long e(int *f) {
for (; c <= 1;c++)
*(f + 1) |= 2;
return 0;
}
int main() {
union a g = {};
e(&d);
&g;
}
%
% gcc-tk -O0 -fsanitize=address a.c && ./a.out
=================================================================
==1==ERROR: AddressSanitizer: global-buffer-overflow on address 0x000000404184
at pc 0x0000004011d6 bp 0x7ffea18cbe60 sp 0x7ffea18cbe58
READ of size 4 at 0x000000404184 thread T0
#0 0x4011d5 in e /a.c:8
#1 0x4012f1 in main /a.c:13
...
%
% gcc-tk -O1 -fsanitize=address a.c && ./a.out
=================================================================
==1==ERROR: AddressSanitizer: global-buffer-overflow on address 0x000000404144
at pc 0x000000401289 bp 0x7ffff4114850 sp 0x7ffff4114848
READ of size 4 at 0x000000404144 thread T0
#0 0x401288 in main /a.c:12
...
%
Maybe a fundunmentally similar to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108023
