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// Stress test of poisoning from signal handler.
// RUN: %clangxx_msan -std=c++11 -O2 %s -o %t && %run %t
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -std=c++11 -O2 %s -o %t && %run %t
// RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -fsanitize-memory-use-after-dtor -std=c++11 -O2 %s -o %t && %run %t
#include <assert.h>
#include <atomic>
#include <pthread.h>
#include <signal.h>
#include <sys/time.h>
#include <sanitizer/msan_interface.h>
std::atomic<int> n = {1000};
struct Tmp {
char buff[1];
~Tmp() {}
};
__attribute__((noinline, optnone)) void Poison() {
// use-after-dtor.
volatile Tmp t;
// Regular poisoning.
__msan_poison(&t, sizeof(t));
}
void *thr(void *p) {
for (; n >= 0;) {
for (int i = 0; i < 1000; i++) {
Poison();
}
}
return 0;
}
void handler(int) {
Poison();
--n;
}
int main(int argc, char **argv) {
const int kThreads = 10;
pthread_t th[kThreads];
for (int i = 0; i < kThreads; i++)
pthread_create(&th[i], 0, thr, 0);
struct sigaction sa = {};
sa.sa_handler = handler;
assert(!sigaction(SIGPROF, &sa, 0));
itimerval t;
t.it_value.tv_sec = 0;
t.it_value.tv_usec = 10;
t.it_interval = t.it_value;
assert(!setitimer(ITIMER_PROF, &t, 0));
for (int i = 0; i < kThreads; i++)
pthread_join(th[i], 0);
return 0;
}
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