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// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
#include "test.h"
#include <stdint.h>
#include <errno.h>
#include <sys/mman.h>
// Test for issue:
// https://github.com/google/sanitizers/issues/412
// MAP_32BIT flag for mmap is supported only for x86_64.
// XFAIL: mips
// XFAIL: aarch64
// XFAIL: powerpc64
// MAP_32BIT doesn't exist on OS X and NetBSD.
// UNSUPPORTED: darwin,netbsd
void *Thread(void *ptr) {
*(int*)ptr = 42;
barrier_wait(&barrier);
return 0;
}
int main() {
barrier_init(&barrier, 2);
void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,
MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
fprintf(stderr, "ptr=%p\n", ptr);
if (ptr == MAP_FAILED) {
fprintf(stderr, "mmap failed: %d\n", errno);
return 1;
}
if ((uintptr_t)ptr >= (1ull << 32)) {
fprintf(stderr, "ptr is too high\n");
return 1;
}
pthread_t t;
pthread_create(&t, 0, Thread, ptr);
barrier_wait(&barrier);
*(int*)ptr = 42;
pthread_join(t, 0);
munmap(ptr, 128 << 10);
fprintf(stderr, "DONE\n");
}
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: DONE
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