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Correct the example in kcov(4) 

mmap(2) has to be called with MAP_SHARED, not MAP_PRIVATE.

Reported by Maciej Grochowski.
This commit is contained in:
kamil 2019-05-28 21:31:53 +00:00
parent 2df3325b2b
commit 0701e2356e
1 changed files with 3 additions and 3 deletions
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6
share/man/man4/kcov.4
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@ -1,4 +1,4 @@
.\" $NetBSD: kcov.4,v 1.5 2019/05/26 01:44:34 kamil Exp $
.\" $NetBSD: kcov.4,v 1.6 2019/05/28 21:31:53 kamil Exp $
.\"
.\" Copyright (c) 2018 Anton Lindqvist <anton@openbsd.org>
.\"
@ -14,7 +14,7 @@
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd May 26, 2019
.Dd May 28, 2019
.Dt KCOV 4
.Os
.Sh NAME
@ -165,7 +165,7 @@ main(void)
if (ioctl(fd, KCOV_IOC_SETBUFSIZE, &size) == -1)
err(1, "ioctl: KCOV_IOC_SETBUFSIZE");
cover = mmap(NULL, size * KCOV_ENTRY_SIZE,
PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (cover == MAP_FAILED)
err(1, "mmap");
mode = KCOV_MODE_TRACE_PC;