1/* PR sanitizer/65400 */ 2/* { dg-shouldfail "tsan" } */ 3/* { dg-additional-options "-fno-omit-frame-pointer -ldl" } */ 4 5#include <pthread.h> 6#include "tsan_barrier.h" 7 8static pthread_barrier_t barrier; 9int v; 10 11int 12fn1 (int a, int b, int c) 13{ 14 int r = (a ^ b) % c; 15 r = r * a * b + c; 16 r = (r ^ b) % c; 17 return r; 18} 19 20int 21fn2 (int a, int b, int c) 22{ 23 int r = (a ^ b) % c; 24 r = r * a * b + c; 25 r = (r ^ b) % c; 26 return r; 27} 28 29__attribute__((noinline, noclone)) void 30foo (void) 31{ 32 barrier_wait (&barrier); 33 barrier_wait (&barrier); 34 v++; 35} 36 37__attribute__((noinline, noclone)) void 38bar (void) 39{ 40 int (*fna) (int, int, int); 41 int (*fnb) (int, int, int); 42 int i; 43 asm ("" : "=g" (fna) : "0" (fn1)); 44 asm ("" : "=g" (fnb) : "0" (fn2)); 45 for (i = 0; i < 128; i++) 46 { 47 fna (0, 0, i + 1); 48 fnb (0, 0, i + 1); 49 } 50 foo (); 51} 52 53__attribute__((noinline, noclone)) void * 54tf (void *arg) 55{ 56 (void) arg; 57 bar (); 58 return NULL; 59} 60 61int 62main () 63{ 64 pthread_t th; 65 barrier_init (&barrier, 2); 66 if (pthread_create (&th, NULL, tf, NULL)) 67 return 0; 68 barrier_wait (&barrier); 69 v++; 70 barrier_wait (&barrier); 71 pthread_join (th, NULL); 72 return 0; 73} 74 75/* { dg-output "WARNING: ThreadSanitizer: data race.*#2 _?tf" } */ 76