From: Noah Goldstein <goldstein.w.n@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH v1] elf: Replace `strcpy` call with `memcpy` [BZ #29454]
Date: Mon, 8 Aug 2022 11:26:22 +0800 [thread overview]
Message-ID: <20220808032622.3804534-2-goldstein.w.n@gmail.com> (raw)
In-Reply-To: <20220808032622.3804534-1-goldstein.w.n@gmail.com>
GCC normally does this optimization for us in
strlen_pass::handle_builtin_strcpy but only for optimized
build. To avoid needing to include strcpy.S in the rtld build to
support the debug build, just do the optimization by hand.
---
elf/dl-cache.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/elf/dl-cache.c b/elf/dl-cache.c
index 8bbf110d02..b97c17b3a9 100644
--- a/elf/dl-cache.c
+++ b/elf/dl-cache.c
@@ -509,8 +509,9 @@ _dl_load_cache_lookup (const char *name)
we are accessing. Therefore we must make the copy of the
mapping data without using malloc. */
char *temp;
- temp = alloca (strlen (best) + 1);
- strcpy (temp, best);
+ size_t best_len = strlen (best) + 1;
+ temp = alloca (best_len);
+ memcpy (temp, best, best_len);
return __strdup (temp);
}
--
2.34.1
next prev parent reply other threads:[~2022-08-08 3:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-08 3:26 [PATCH v1] x86: Fix `#define STRCPY` guard in strcpy-sse2.S Noah Goldstein
2022-08-08 3:26 ` Noah Goldstein [this message]
2022-08-08 10:19 ` [PATCH v1] elf: Replace `strcpy` call with `memcpy` [BZ #29454] Yann Droneaud
2022-08-08 14:23 ` H.J. Lu
2022-08-10 3:29 ` Noah Goldstein
2022-08-08 14:21 ` [PATCH v1] x86: Fix `#define STRCPY` guard in strcpy-sse2.S H.J. Lu
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