Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
Pirama Arumuga Nainar | 799172d | 2016-03-03 15:50:30 -0800 | [diff] [blame^] | 2 | // UNSUPPORTED: darwin |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 3 | #include <pthread.h> |
| 4 | #include <stdio.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <signal.h> |
| 7 | #include <sys/types.h> |
| 8 | #include <sys/time.h> |
| 9 | #include <unistd.h> |
| 10 | #include <errno.h> |
| 11 | |
| 12 | volatile int X; |
| 13 | int stop; |
| 14 | |
| 15 | static void handler(int sig) { |
| 16 | (void)sig; |
| 17 | if (X != 0) |
| 18 | printf("bad"); |
| 19 | } |
| 20 | |
| 21 | static void* busy(void *p) { |
| 22 | while (__atomic_load_n(&stop, __ATOMIC_RELAXED) == 0) { |
| 23 | } |
| 24 | return 0; |
| 25 | } |
| 26 | |
| 27 | static void* reset(void *p) { |
| 28 | struct sigaction act = {}; |
| 29 | for (int i = 0; i < 1000000; i++) { |
| 30 | act.sa_handler = &handler; |
| 31 | if (sigaction(SIGPROF, &act, 0)) { |
| 32 | perror("sigaction"); |
| 33 | exit(1); |
| 34 | } |
| 35 | act.sa_handler = SIG_IGN; |
| 36 | if (sigaction(SIGPROF, &act, 0)) { |
| 37 | perror("sigaction"); |
| 38 | exit(1); |
| 39 | } |
| 40 | } |
| 41 | return 0; |
| 42 | } |
| 43 | |
| 44 | int main() { |
| 45 | struct sigaction act = {}; |
| 46 | act.sa_handler = SIG_IGN; |
| 47 | if (sigaction(SIGPROF, &act, 0)) { |
| 48 | perror("sigaction"); |
| 49 | exit(1); |
| 50 | } |
| 51 | |
| 52 | itimerval t; |
| 53 | t.it_value.tv_sec = 0; |
| 54 | t.it_value.tv_usec = 10; |
| 55 | t.it_interval = t.it_value; |
| 56 | if (setitimer(ITIMER_PROF, &t, 0)) { |
| 57 | perror("setitimer"); |
| 58 | exit(1); |
| 59 | } |
| 60 | |
| 61 | pthread_t th[2]; |
| 62 | pthread_create(&th[0], 0, busy, 0); |
| 63 | pthread_create(&th[1], 0, reset, 0); |
| 64 | |
| 65 | pthread_join(th[1], 0); |
| 66 | __atomic_store_n(&stop, 1, __ATOMIC_RELAXED); |
| 67 | pthread_join(th[0], 0); |
| 68 | |
| 69 | fprintf(stderr, "DONE\n"); |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | // CHECK-NOT: WARNING: ThreadSanitizer: |
| 74 | // CHECK: DONE |
| 75 | // CHECK-NOT: WARNING: ThreadSanitizer: |