git: ca0088ae27a5 - main - stress2: Occasionally modify 8 bits

[Peter Holm]

The branch main has been updated by pho:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=ca0088ae27a5154f9279b53b2f7493986167d967

commit ca0088ae27a5154f9279b53b2f7493986167d967
Author:     Peter Holm <p...@freebsd.org>
AuthorDate: 2023-05-22 08:05:34 +0000
Commit:     Peter Holm <p...@freebsd.org>
CommitDate: 2023-05-22 08:05:34 +0000

    stress2: Occasionally modify 8 bits
---
 tools/test/stress2/tools/flip.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/test/stress2/tools/flip.c b/tools/test/stress2/tools/flip.c
index a298aebf6d43..e1f12e97a79c 100644
--- a/tools/test/stress2/tools/flip.c
+++ b/tools/test/stress2/tools/flip.c
@@ -70,6 +70,15 @@ flip(void *ap, size_t len)
 #endif
 }
 
+static void
+trash(char *c)
+{
+       if (arc4random() % 2 == 1)
+               *c = 0;
+       else
+               arc4random_buf(c, sizeof(c));
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -122,7 +131,10 @@ main(int argc, char *argv[])
                        err(1, "lseek()");
                if (read(fd, &c, 1) != 1)
                        err(1, "read()");
-               flip(&c, 1);
+               if (arc4random() % 100 < 80)
+                       flip(&c, 1);
+               else
+                       trash(&c);
                if (lseek(fd, pos, SEEK_SET) == -1)
                        err(1, "lseek()");
                if (write(fd, &c, 1) != 1)