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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
// UNSUPPORTED: darwin
// Fails episodically on powerpc bots:
// https://lab.llvm.org/buildbot/#/builders/121/builds/13391
// UNSUPPORTED: powerpc64, powerpc64le
#include "test.h"
#include <errno.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/types.h>
// Test synchronization in signal handled within IgnoreSync region.
const int kSignalCount = 500;
__thread int process_signals;
int signals_handled;
int done;
int ready[kSignalCount];
long long data[kSignalCount];
static void handler(int sig) {
if (!__atomic_load_n(&process_signals, __ATOMIC_RELAXED))
return;
int pos = signals_handled++;
if (pos >= kSignalCount)
return;
data[pos] = pos;
__atomic_store_n(&ready[pos], 1, __ATOMIC_RELEASE);
}
static void* thr(void *p) {
AnnotateIgnoreSyncBegin(__FILE__, __LINE__);
__atomic_store_n(&process_signals, 1, __ATOMIC_RELAXED);
while (!__atomic_load_n(&done, __ATOMIC_RELAXED)) {
}
AnnotateIgnoreSyncEnd(__FILE__, __LINE__);
return 0;
}
int main() {
struct sigaction act = {};
act.sa_handler = handler;
if (sigaction(SIGPROF, &act, 0)) {
perror("sigaction");
exit(1);
}
itimerval t;
t.it_value.tv_sec = 0;
t.it_value.tv_usec = 10;
t.it_interval = t.it_value;
if (setitimer(ITIMER_PROF, &t, 0)) {
perror("setitimer");
exit(1);
}
pthread_t th;
pthread_create(&th, 0, thr, 0);
for (int pos = 0; pos < kSignalCount; pos++) {
while (__atomic_load_n(&ready[pos], __ATOMIC_ACQUIRE) == 0) {
}
if (data[pos] != pos) {
printf("at pos %d, expect %d, got %lld\n", pos, pos, data[pos]);
exit(1);
}
}
__atomic_store_n(&done, 1, __ATOMIC_RELAXED);
pthread_join(th, 0);
fprintf(stderr, "DONE\n");
return 0;
}
// CHECK-NOT: WARNING: ThreadSanitizer:
// CHECK: DONE
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