forked from OSchip/llvm-project
76 lines
1.4 KiB
C++
76 lines
1.4 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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// UNSUPPORTED: darwin
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <errno.h>
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volatile int X;
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int stop;
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static void handler(int sig) {
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(void)sig;
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if (X != 0)
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printf("bad");
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}
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static void* busy(void *p) {
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while (__atomic_load_n(&stop, __ATOMIC_RELAXED) == 0) {
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}
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return 0;
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}
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static void* reset(void *p) {
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struct sigaction act = {};
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for (int i = 0; i < 1000000; i++) {
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act.sa_handler = &handler;
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if (sigaction(SIGPROF, &act, 0)) {
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perror("sigaction");
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exit(1);
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}
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act.sa_handler = SIG_IGN;
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if (sigaction(SIGPROF, &act, 0)) {
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perror("sigaction");
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exit(1);
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}
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}
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return 0;
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}
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int main() {
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struct sigaction act = {};
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act.sa_handler = SIG_IGN;
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if (sigaction(SIGPROF, &act, 0)) {
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perror("sigaction");
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exit(1);
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}
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itimerval t;
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t.it_value.tv_sec = 0;
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t.it_value.tv_usec = 10;
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t.it_interval = t.it_value;
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if (setitimer(ITIMER_PROF, &t, 0)) {
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perror("setitimer");
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exit(1);
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}
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pthread_t th[2];
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pthread_create(&th[0], 0, busy, 0);
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pthread_create(&th[1], 0, reset, 0);
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pthread_join(th[1], 0);
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__atomic_store_n(&stop, 1, __ATOMIC_RELAXED);
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pthread_join(th[0], 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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// CHECK-NOT: WARNING: ThreadSanitizer:
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// CHECK: DONE
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// CHECK-NOT: WARNING: ThreadSanitizer:
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