51 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s2#include "test.h"3#include <stdint.h>4#include <errno.h>5#include <sys/mman.h>6 7// Test for issue:8// https://github.com/google/sanitizers/issues/4129 10// MAP_32BIT flag for mmap is supported only for x86_64.11// XFAIL: target=mips{{.*}}12// XFAIL: target=aarch64{{.*}}13// XFAIL: target=powerpc64{{.*}}14// XFAIL: target=s390x{{.*}}15// XFAIL: target=loongarch64{{.*}}16// XFAIL: target=riscv64{{.*}}17 18// MAP_32BIT doesn't exist on OS X and NetBSD.19// UNSUPPORTED: darwin,target={{.*netbsd.*}}20 21void *Thread(void *ptr) {22 *(int*)ptr = 42;23 barrier_wait(&barrier);24 return 0;25}26 27int main() {28 barrier_init(&barrier, 2);29 void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,30 MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);31 fprintf(stderr, "ptr=%p\n", ptr);32 if (ptr == MAP_FAILED) {33 fprintf(stderr, "mmap failed: %d\n", errno);34 return 1;35 }36 if ((uintptr_t)ptr >= (1ull << 32)) {37 fprintf(stderr, "ptr is too high\n");38 return 1;39 }40 pthread_t t;41 pthread_create(&t, 0, Thread, ptr);42 barrier_wait(&barrier);43 *(int*)ptr = 42;44 pthread_join(t, 0);45 munmap(ptr, 128 << 10);46 fprintf(stderr, "DONE\n");47}48 49// CHECK: WARNING: ThreadSanitizer: data race50// CHECK: DONE51