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elf: Replace strcpy call with memcpy [BZ #29454]

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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.
This commit is contained in:
Noah Goldstein 2022-08-08 11:26:22 +08:00
parent 8bc3f94a06
commit 483cfe1a6a
1 changed files with 3 additions and 2 deletions
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5
elf/dl-cache.c
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@ -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);
}