Add safe memset and use it

This adds a `git__memset` routine that will not be optimized away
and updates the places where I memset() right before a free() call
to use it.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index da15a039d..248cf4c42 100644
--- a/src/util.c
+++ b/src/util.c
@@ -722,3 +722,13 @@ void git__insertsort_r(
 	if (freeswap)
 		git__free(swapel);
 }
+
+void git__memset(void *data, int c, size_t size)
+{
+	volatile uint8_t *scan = data;
+	uint8_t *end = scan + size;
+	uint8_t val = (uint8_t)c;
+
+	while (scan < end)
+		*scan++ = val;
+}