mirror of
https://github.com/ioacademy-jikim/debugging
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26 lines
711 B
C
26 lines
711 B
C
#include <assert.h>
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#include <stdlib.h>
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#include <sys/poll.h>
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// At one point, poll()'s checking was not done accurately. This test
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// exposes this -- previously Memcheck only found one error, now if finds
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// two.
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int main(void)
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{
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// Under-allocate by one byte so we get an addressability error.
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struct pollfd* ufds = malloc(2 * sizeof(struct pollfd) - 1);
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assert(ufds);
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ufds[0].fd = 0;
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ufds[0].events = 0;
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//ufds[1].fd = 0; // leave undefined so we get another error.
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ufds[1].events = 0;
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// Previously, the bounds-error due to the under-allocation was detected,
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// but not the undefined value error due to ufds[1].fd not being defined.
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poll(ufds, 2, 200);
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return 0;
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}
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