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[Emacs-diffs] master 4a5ed6b 2/3: Port dump_bitset_clear to -fsanitize=u
From: |
Paul Eggert |
Subject: |
[Emacs-diffs] master 4a5ed6b 2/3: Port dump_bitset_clear to -fsanitize=undefined |
Date: |
Mon, 22 Apr 2019 00:16:32 -0400 (EDT) |
branch: master
commit 4a5ed6b05a71593cda33af4da44f30eb84b51f30
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>
Port dump_bitset_clear to -fsanitize=undefined
* src/pdumper.c (dump_bitset_clear):
Pacify -fsanitize=undefined by avoiding memset (NULL, x, 0),
which strictly speaking has undefined behavior although it
works on all production platforms I know.
---
src/pdumper.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/pdumper.c b/src/pdumper.c
index 3facd52..6ab8276 100644
--- a/src/pdumper.c
+++ b/src/pdumper.c
@@ -4923,7 +4923,8 @@ static void
dump_bitset_clear (struct dump_bitset *bitset)
{
int xword_size = sizeof (bitset->bits[0]);
- memset (bitset->bits, 0, bitset->number_words * xword_size);
+ if (bitset->number_words)
+ memset (bitset->bits, 0, bitset->number_words * xword_size);
}
struct pdumper_loaded_dump_private