| Issue |
63886
|
| Summary |
[ASan] fails to detect OOB access due to builtin optimization
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
N-R-K
|
Minimal reproducible code-snippet:
```c
#include <string.h>
int main(void)
{
char s[1] = "A";
return strlen(s);
}
```
Compile command: `clang -O1 -g3 -fsanitize=address,undefined`
Expected behavior: ASan should catch the OOB access.
Reality: It gets optimized out and returns 1 always.
Note: adding `-fno-builtin` or `-O0` allows ASan to be effective.
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