https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108014
Bug ID: 108014
Summary: Incorrect line number in UBSAN's 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, GCC's UBsan at -O1 and above produces incorrect line
number in the final report.
Compiler explorer: https://godbolt.org/z/jvvdrfPdo
% cat -n a.c
1 int a, b;
2 char c[5];
3 int d[1];
4 static int g() {
5 long e;
6 b = __INT_MAX__;
7 for (int f = 0; f < sizeof(c); f++)
8 e = b + 1;
9 return 0;
10 }
11 int main() {
12 for (b = 0;b<1; b++) {
13 d[a];
14 g();
15 }
16 }
%
% gcc-tk -O0 -fsanitize=undefined -fno-sanitize-recover=all a.c && ./a.out
a.c:8:11: runtime error: signed integer overflow: 2147483647 + 1 cannot be
represented in type 'int'
% gcc-tk -O1 -fsanitize=undefined -fno-sanitize-recover=all a.c && ./a.out
a.c:12:20: runtime error: signed integer overflow: 2147483647 + 1 cannot be
represented in type 'int'
%
