1 #include <assert.h>
2 #include <stdlib.h>
3 #include <sys/poll.h>
4 
5 // At one point, poll()'s checking was not done accurately.  This test
6 // exposes this -- previously Memcheck only found one error, now if finds
7 // two.
8 
9 int main(void)
10 {
11    // Under-allocate by one byte so we get an addressability error.
12    struct pollfd* ufds = malloc(2 * sizeof(struct pollfd) - 1);
13    assert(ufds);
14 
15    ufds[0].fd = 0;
16    ufds[0].events = 0;
17    //ufds[1].fd = 0;    // leave undefined so we get another error.
18    ufds[1].events = 0;
19 
20    // Previously, the bounds-error due to the under-allocation was detected,
21    // but not the undefined value error due to ufds[1].fd not being defined.
22    poll(ufds, 2, 200);
23 
24    return 0;
25 }
26