| Issue |
107881
|
| Summary |
pthread interceptors for ASAN/MSAN
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
ccotter
|
Common pthread APIs like `pthread_mutex_lock` do not seem to have ASAN or MSAN interceptors. The following program is not caught by ASAN, though it is caught by TSAN with a `ThreadSanitizer: heap-use-after-free` diagnostic.
ASAN and MSAN intercept other libc names and check for the validity of the input parameters. Are the pthread APIs intentionally left out , or should they be added to `sanitizer_common_interceptors.inc` to catch such errors.
```
#include <pthread.h>
int main() {
pthread_mutex_t* m = new pthread_mutex_t;
delete m;
pthread_mutex_lock(m); // No ASAN or MSAN diagnostic. TSAN catches this with heap-use-after-free.
return 0;
}
```
Stack use after free are not caught by any of the sanitizers.
```
#include <pthread.h>
int main() {
pthread_mutex_t* m;
{
pthread_mutex_t mtx;
m = &mtx;
}
pthread_mutex_lock(m); // ASAN/MSAN hang on my system (but do not give any sanitizer diagnostic). The TSAN program runs without any error.
return 0;
}
```
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