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