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// RUN: %clangxx_asan -std=c++11 -O0 %s -o %t && %run %t
#include <assert.h>
#include <unistd.h>
#include <sys/mman.h>
int main(void) {
unsigned char vec[20];
int res;
size_t PS = sysconf(_SC_PAGESIZE);
void *addr = mmap(nullptr, 20 * PS, PROT_READ | PROT_WRITE,
MAP_NORESERVE | MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
res = mincore(addr, 10 * PS, vec);
assert(res == 0);
for (int i = 0; i < 10; ++i)
assert((vec[i] & 1) == 0);
for (int i = 0; i < 5; ++i)
((char *)addr)[i * PS] = 1;
res = mincore(addr, 10 * PS, vec);
assert(res == 0);
for (int i = 0; i < 10; ++i)
assert((vec[i] & 1) == (i < 5));
for (int i = 5; i < 10; ++i)
((char *)addr)[i * PS] = 1;
res = mincore(addr, 10 * PS, vec);
assert(res == 0);
for (int i = 0; i < 10; ++i)
assert((vec[i] & 1) == 1);
return 0;
}
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