1 | // RUN: %clangxx -fsanitize=local-bounds %s -O3 -o %t && %run %t 1 |
---|---|
2 | // RUN: %clangxx -fsanitize=local-bounds %s -O3 -o %t && not --crash %run %t 3 |
3 | // RUN: %clangxx -fsanitize=local-bounds -fno-sanitize-trap=local-bounds %s -O3 -o %t && not --crash %run %t 3 2>&1 | FileCheck %s |
4 | // RUN: %clangxx -fsanitize=local-bounds -fno-sanitize-trap=local-bounds -fsanitize-recover=local-bounds %s -O3 -o %t && %run %t 3 2>&1 | FileCheck %s |
5 | |
6 | #include <cstdlib> |
7 | |
8 | struct S { |
9 | int k; |
10 | int l; |
11 | }; |
12 | |
13 | __attribute__((noinline)) void init(S *s) { |
14 | __asm__ __volatile__("": : "r"(s) : "memory"); |
15 | } |
16 | |
17 | __attribute__((noinline, no_sanitize("memory"))) int test(char i) { |
18 | S a; |
19 | init(s: &a); |
20 | S b; |
21 | init(s: &b); |
22 | return ((int *)(&a))[i]; |
23 | // CHECK: ubsan: local-out-of-bounds by 0x{{[[:xdigit:]]+$}} |
24 | } |
25 | |
26 | int main(int argc, char **argv) { |
27 | test(i: argv[1][0] - '0'); |
28 | return 0; |
29 | } |
30 |