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| author | Joseph Myers <joseph@codesourcery.com> | 2014-11-12 22:41:03 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-11-12 22:41:03 +0000 |
| commit | 9975e3d37d8585b41db075321bade3495cf58cdb (patch) | |
| tree | 416cb16185348b44feb8e0fdb778325a52598e21 | |
| parent | c4eae75271734f820a7477dbce33f8752af6f003 (diff) | |
| download | glibc-9975e3d37d8585b41db075321bade3495cf58cdb.zip glibc-9975e3d37d8585b41db075321bade3495cf58cdb.tar.gz glibc-9975e3d37d8585b41db075321bade3495cf58cdb.tar.bz2 | |
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.
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | include/string.h | 2 | ||||
| -rw-r--r-- | locale/findlocale.c | 4 | ||||
| -rw-r--r-- | string/memmem.c | 9 |
5 files changed, 20 insertions, 6 deletions
@@ -1,5 +1,14 @@ 2014-11-12 Joseph Myers <joseph@codesourcery.com> + [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. + [BZ #17582] * libio/iofgets.c [weak_alias && !_IO_MTSAFE_IO] (__fgets_unlocked): Add alias of _IO_fgets. Use libc_hidden_def. @@ -11,7 +11,7 @@ Version 2.21 6652, 12926, 14132, 14138, 14171, 15215, 15884, 17266, 17344, 17363, 17370, 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, - 17555, 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584. + 17555, 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585. * New locales: tu_IN, bh_IN. diff --git a/include/string.h b/include/string.h index 2603e9c..99cc2d3 100644 --- a/include/string.h +++ b/include/string.h @@ -90,6 +90,8 @@ extern char *__strsep_g (char **__stringp, const char *__delim); libc_hidden_proto (__strsep_g) libc_hidden_proto (strnlen) libc_hidden_proto (memmem) +extern __typeof (memmem) __memmem; +libc_hidden_proto (__memmem) libc_hidden_proto (__ffs) libc_hidden_builtin_proto (memchr) diff --git a/locale/findlocale.c b/locale/findlocale.c index 22e8b53..b64352c 100644 --- a/locale/findlocale.c +++ b/locale/findlocale.c @@ -79,8 +79,8 @@ valid_locale_name (const char *name) return 0; /* Directory traversal attempt. */ static const char slashdot[4] = {'/', '.', '.', '/'}; - if (__glibc_unlikely (memmem (name, namelen, - slashdot, sizeof (slashdot)) != NULL)) + if (__glibc_unlikely (__memmem (name, namelen, + slashdot, sizeof (slashdot)) != NULL)) return 0; if (namelen == 2 && __glibc_unlikely (name[0] == '.' && name [1] == '.')) return 0; diff --git a/string/memmem.c b/string/memmem.c index b2842fe..bafac03 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 |