blob: bb861b07745e1356b31ef863c02374306c33f3e2 [file] [log] [blame]
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <dlfcn.h>
#include <stddef.h>
// TSan-invisible barrier.
// Tests use it to establish necessary execution order in a way that does not
// interfere with tsan (does not establish synchronization between threads).
__typeof(pthread_barrier_wait) *barrier_wait;
void barrier_init(pthread_barrier_t *barrier, unsigned count) {
if (barrier_wait == 0) {
void *h = dlopen("", RTLD_LAZY);
if (h == 0) {
fprintf(stderr, "failed to dlopen, exiting\n");
barrier_wait = (__typeof(barrier_wait))dlsym(h, "pthread_barrier_wait");
if (barrier_wait == 0) {
fprintf(stderr, "failed to resolve pthread_barrier_wait, exiting\n");
pthread_barrier_init(barrier, 0, count);
// Default instance of the barrier, but a test can declare more manually.
pthread_barrier_t barrier;
void print_address(void *address) {
// On FreeBSD, the %p conversion specifier works as 0x%x and thus does not match
// to the format used in the diagnotic message.
#ifdef __x86_64__
fprintf(stderr, "0x%012lx", (unsigned long) address);
#elif defined(__mips64)
fprintf(stderr, "0x%010lx", (unsigned long) address);