forked from OSchip/llvm-project
37 lines
976 B
C++
37 lines
976 B
C++
// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
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#include <assert.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sanitizer/msan_interface.h>
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int main(void) {
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unsigned char vec[20];
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int res;
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size_t PS = sysconf(_SC_PAGESIZE);
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void *addr = mmap(nullptr, 20 * PS, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
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__msan_poison(&vec, sizeof(vec));
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res = mincore(addr, 10 * PS, vec);
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assert(res == 0);
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assert(__msan_test_shadow(vec, sizeof(vec)) == 10);
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__msan_poison(&vec, sizeof(vec));
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res = mincore(addr, 10 * PS + 42, vec);
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assert(res == 0);
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assert(__msan_test_shadow(vec, sizeof(vec)) == 11);
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__msan_poison(&vec, sizeof(vec));
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res = mincore(addr, 10 * PS - 1, vec);
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assert(res == 0);
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assert(__msan_test_shadow(vec, sizeof(vec)) == 10);
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__msan_poison(&vec, sizeof(vec));
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res = mincore(addr, 1, vec);
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assert(res == 0);
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assert(__msan_test_shadow(vec, sizeof(vec)) == 1);
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return 0;
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}
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