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// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
#include <sys/mman.h>
#if defined(__FreeBSD__)
// The MAP_NORESERVE define has been removed in FreeBSD 11.x, and even before
// that, it was never implemented. So just define it to zero.
#undef MAP_NORESERVE
#define MAP_NORESERVE 0
#endif
int main() {
#ifdef __x86_64__
const size_t kLog2Size = 39;
#elif defined(__mips64) || defined(__aarch64__)
const size_t kLog2Size = 32;
#elif defined(__powerpc64__)
const size_t kLog2Size = 39;
#endif
const uintptr_t kLocation = 0x40ULL << kLog2Size;
void *p = mmap(
reinterpret_cast<void*>(kLocation),
1ULL << kLog2Size,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON|MAP_NORESERVE,
-1, 0);
fprintf(stderr, "DONE %p %d\n", p, errno);
return p == MAP_FAILED;
}
// CHECK: DONE
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