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150
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1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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2 #include "test.h"
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3 #include <stdint.h>
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4 #include <errno.h>
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5 #include <sys/mman.h>
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6
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7 // Test for issue:
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8 // https://github.com/google/sanitizers/issues/412
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9
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10 // MAP_32BIT flag for mmap is supported only for x86_64.
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252
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11 // XFAIL: target=mips{{.*}}
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12 // XFAIL: target=aarch64{{.*}}
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13 // XFAIL: target=powerpc64{{.*}}
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14 // XFAIL: target=s390x{{.*}}
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15 // XFAIL: target=loongarch64{{.*}}
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150
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16
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17 // MAP_32BIT doesn't exist on OS X and NetBSD.
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252
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18 // UNSUPPORTED: darwin,target={{.*netbsd.*}}
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150
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19
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20 void *Thread(void *ptr) {
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21 *(int*)ptr = 42;
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22 barrier_wait(&barrier);
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23 return 0;
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24 }
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25
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26 int main() {
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27 barrier_init(&barrier, 2);
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28 void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,
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29 MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
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30 fprintf(stderr, "ptr=%p\n", ptr);
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31 if (ptr == MAP_FAILED) {
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32 fprintf(stderr, "mmap failed: %d\n", errno);
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33 return 1;
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34 }
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35 if ((uintptr_t)ptr >= (1ull << 32)) {
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36 fprintf(stderr, "ptr is too high\n");
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37 return 1;
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38 }
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39 pthread_t t;
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40 pthread_create(&t, 0, Thread, ptr);
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41 barrier_wait(&barrier);
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42 *(int*)ptr = 42;
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43 pthread_join(t, 0);
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44 munmap(ptr, 128 << 10);
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45 fprintf(stderr, "DONE\n");
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46 }
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47
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48 // CHECK: WARNING: ThreadSanitizer: data race
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49 // CHECK: DONE
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