846de99fbd
Patch by Sagar Thakur Reviewers: dvyukov, samsonov, kcc. Subscribers: dsanders, mohit.bhakkad, Anand.Takale, llvm-commits. Differential Revision: http://reviews.llvm.org/D7290 llvm-svn: 230002
44 lines
1019 B
C++
44 lines
1019 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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#include "test.h"
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#include <stdint.h>
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#include <errno.h>
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#include <sys/mman.h>
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// Test for issue:
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// https://code.google.com/p/thread-sanitizer/issues/detail?id=5
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// MAP_32BIT flag for mmap is supported only for x86_64.
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// XFAIL: mips64
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void *Thread(void *ptr) {
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*(int*)ptr = 42;
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barrier_wait(&barrier);
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return 0;
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}
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int main() {
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barrier_init(&barrier, 2);
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void *ptr = mmap(0, 128 << 10, PROT_READ|PROT_WRITE,
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MAP_32BIT|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
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fprintf(stderr, "ptr=%p\n", ptr);
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if (ptr == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %d\n", errno);
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return 1;
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}
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if ((uintptr_t)ptr >= (1ull << 32)) {
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fprintf(stderr, "ptr is too high\n");
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return 1;
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}
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pthread_t t;
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pthread_create(&t, 0, Thread, ptr);
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barrier_wait(&barrier);
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*(int*)ptr = 42;
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pthread_join(t, 0);
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munmap(ptr, 128 << 10);
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fprintf(stderr, "DONE\n");
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: DONE
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