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authorJoseph Myers <joseph@codesourcery.com>2014-11-12 22:41:03 +0000
committerJoseph Myers <joseph@codesourcery.com>2014-11-12 22:41:03 +0000
commit9975e3d37d8585b41db075321bade3495cf58cdb (patch)
tree416cb16185348b44feb8e0fdb778325a52598e21 /string/memmem.c
parentc4eae75271734f820a7477dbce33f8752af6f003 (diff)
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Fix locale memmem namespace (bug 17585).
Locale code, brought in by ISO C functions, calls memmem, which is not an ISO C function. This isn't an ISO C conformance bug, because all mem* names are reserved, but glibc practice is not to rely on that reservation (thus, memmem is only declared in string.h if __USE_GNU even though ISO C would allow it to be declared unconditionally, for example). This patch changes that code to use __memmem. Note: there are uses of memmem elsewhere in glibc that I didn't change, although it may turn out some of those also need to use __memmem. Tested for x86_64 (testsuite, and that disassembly of installed shared libraries is unchanged by this patch). [BZ #17585] * string/memmem.c [!_LIBC] (__memmem): Define to memmem. (memmem): Rename to __memmem and define as weak alias of __memmem. Use libc_hidden_weak. (__memmem): Use libc_hidden_def. * include/string.h (__memmem): Declare. Use libc_hidden_proto. * locale/findlocale.c (valid_locale_name): Use __memmem instead of memmem.
Diffstat (limited to 'string/memmem.c')
-rw-r--r--string/memmem.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/string/memmem.c b/string/memmem.c
index b2842fe57f..bafac03df9 100644
--- a/string/memmem.c
+++ b/string/memmem.c
@@ -26,6 +26,7 @@
#ifndef _LIBC
# define __builtin_expect(expr, val) (expr)
+# define __memmem memmem
#endif
#define RETURN_TYPE void *
@@ -38,8 +39,8 @@
if NEEDLE_LEN is 0, otherwise NULL if NEEDLE is not found in
HAYSTACK. */
void *
-memmem (const void *haystack_start, size_t haystack_len,
- const void *needle_start, size_t needle_len)
+__memmem (const void *haystack_start, size_t haystack_len,
+ const void *needle_start, size_t needle_len)
{
/* Abstract memory is considered to be an array of 'unsigned char' values,
not an array of 'char' values. See ISO C 99 section 6.2.6.1. */
@@ -73,6 +74,8 @@ memmem (const void *haystack_start, size_t haystack_len,
else
return two_way_long_needle (haystack, haystack_len, needle, needle_len);
}
-libc_hidden_def (memmem)
+libc_hidden_def (__memmem)
+weak_alias (__memmem, memmem)
+libc_hidden_weak (memmem)
#undef LONG_NEEDLE_THRESHOLD