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executor: add a clarifying comment

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Michael Tuexen 2018-12-29 16:04:46 +01:00 committed by Dmitry Vyukov
parent 6aef08ce12
commit e0cd1d2e84
1 changed files with 2 additions and 0 deletions
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2
executor/executor_bsd.h
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@ -93,9 +93,11 @@ static void cover_enable(cover_t* cov, bool collect_comps)
{
int kcov_mode = collect_comps ? KCOV_MODE_TRACE_CMP : KCOV_MODE_TRACE_PC;
#if GOOS_freebsd
// FreeBSD uses an int as the third argument.
if (ioctl(cov->fd, KIOENABLE, kcov_mode))
exitf("cover enable write trace failed, mode=%d", kcov_mode);
#elif GOOS_openbsd
// OpenBSD uses an pointer to an int as the third argument.
if (ioctl(cov->fd, KIOENABLE, &kcov_mode))
exitf("cover enable write trace failed, mode=%d", kcov_mode);
#endif