Fix regex wctype namespace (bug 18495).

regcomp brings in references to various wctype functions that aren't
in all the standards including regcomp.  This patch fixes this in the
usual way by using the __* versions of these functions (which already
exist, but some didn't have libc_hidden_proto / libc_hidden_def
before).

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).  (Other wide character
function references from the regex code mean that this patch by itself
doesn't fix any XFAILed linknamespace test failures; further patches
will be needed for that.)

	[BZ #18495]
	* wctype/wcfuncs.c (__iswalnum): Use libc_hidden_def.
	(__iswlower): Likewise.
	* include/wctype.h (__iswalnum): Declare.  Use libc_hidden_proto.
	(__iswlower): Likewise.
	* posix/regcomp.c (re_compile_fastmap_iter): Call __towlower
	instead of towlower.
	* posix/regex_internal.c (build_wcs_upper_buffer): Call __iswlower
	instead of iswlower.  Call __towupper instead of towupper.
	* posix/regex_internal.h (IS_WIDE_WORD_CHAR): Call __iswalnum
	instead of iswalnum.

7 files changed, 28 insertions, 8 deletions

diff --git a/ChangeLog b/ChangeLog
index b4605e2223..1ebd443ef2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2015-06-05  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #18495]
+	* wctype/wcfuncs.c (__iswalnum): Use libc_hidden_def.
+	(__iswlower): Likewise.
+	* include/wctype.h (__iswalnum): Declare.  Use libc_hidden_proto.
+	(__iswlower): Likewise.
+	* posix/regcomp.c (re_compile_fastmap_iter): Call __towlower
+	instead of towlower.
+	* posix/regex_internal.c (build_wcs_upper_buffer): Call __iswlower
+	instead of iswlower.  Call __towupper instead of towupper.
+	* posix/regex_internal.h (IS_WIDE_WORD_CHAR): Call __iswalnum
+	instead of iswalnum.
+
 2015-06-05  Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>
 
 	* malloc/tst-malloc-backtrace.c (do_test): Redirect libc fatal
diff --git a/NEWS b/NEWS
index 8a16e3f494..5537dedb39 100644
--- a/NEWS
+++ b/NEWS
@@ -20,7 +20,7 @@ Version 2.22
   18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206, 18210,
   18211, 18217, 18220, 18221, 18234, 18244, 18247, 18287, 18319, 18324,
   18333, 18346, 18397, 18409, 18410, 18412, 18418, 18422, 18434, 18444,
-  18468, 18469, 18470.
+  18468, 18469, 18470, 18495.
 
 * Cache information can be queried via sysconf() function on s390 e.g. with
   _SC_LEVEL1_ICACHE_SIZE as argument.
diff --git a/include/wctype.h b/include/wctype.h
index 88c78e62a0..a71b10377b 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -46,11 +46,13 @@ extern wctype_t __wctype (const char *__property);
 extern wctrans_t __wctrans (const char *__property);
 extern wint_t __towctrans (wint_t __wc, wctrans_t __desc);
 
+extern __typeof (iswalnum) __iswalnum __THROW __attribute_pure__;
 extern __typeof (iswalnum_l) __iswalnum_l;
 extern __typeof (iswalpha_l) __iswalpha_l;
 extern __typeof (iswblank_l) __iswblank_l;
 extern __typeof (iswcntrl_l) __iswcntrl_l;
 extern __typeof (iswdigit_l) __iswdigit_l;
+extern __typeof (iswlower) __iswlower __THROW __attribute_pure__;
 extern __typeof (iswlower_l) __iswlower_l;
 extern __typeof (iswgraph_l) __iswgraph_l;
 extern __typeof (iswprint_l) __iswprint_l;
@@ -65,11 +67,13 @@ extern __typeof (towupper) __towupper __THROW __attribute_pure__;
 
 libc_hidden_proto (__towctrans)
 libc_hidden_proto (__iswctype)
+libc_hidden_proto (__iswalnum)
 libc_hidden_proto (__iswalnum_l)
 libc_hidden_proto (__iswalpha_l)
 libc_hidden_proto (__iswblank_l)
 libc_hidden_proto (__iswcntrl_l)
 libc_hidden_proto (__iswdigit_l)
+libc_hidden_proto (__iswlower)
 libc_hidden_proto (__iswlower_l)
 libc_hidden_proto (__iswgraph_l)
 libc_hidden_proto (__iswprint_l)
diff --git a/posix/regcomp.c b/posix/regcomp.c
index 0adde3d4a8..728c48239f 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -334,7 +334,7 @@ re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
 	      memset (&state, '\0', sizeof (state));
 	      if (__mbrtowc (&wc, (const char *) buf, p - buf,
 			     &state) == p - buf
-		  && (__wcrtomb ((char *) buf, towlower (wc), &state)
+		  && (__wcrtomb ((char *) buf, __towlower (wc), &state)
 		      != (size_t) -1))
 		re_set_fastmap (fastmap, 0, buf[0]);
 	    }
@@ -410,7 +410,7 @@ re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
 		    re_set_fastmap (fastmap, icase, *(unsigned char *) buf);
 		  if ((bufp->syntax & RE_ICASE) && dfa->mb_cur_max > 1)
 		    {
-		      if (__wcrtomb (buf, towlower (cset->mbchars[i]), &state)
+		      if (__wcrtomb (buf, __towlower (cset->mbchars[i]), &state)
 			  != (size_t) -1)
 			re_set_fastmap (fastmap, false, *(unsigned char *) buf);
 		    }
diff --git a/posix/regex_internal.c b/posix/regex_internal.c
index e5a14cde20..d77d3a14dc 100644
--- a/posix/regex_internal.c
+++ b/posix/regex_internal.c
@@ -312,11 +312,11 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	  if (BE (mbclen + 2 > 2, 1))
 	    {
 	      wchar_t wcu = wc;
-	      if (iswlower (wc))
+	      if (__iswlower (wc))
 		{
 		  size_t mbcdlen;
 
-		  wcu = towupper (wc);
+		  wcu = __towupper (wc);
 		  mbcdlen = wcrtomb (buf, wcu, &prev_st);
 		  if (BE (mbclen == mbcdlen, 1))
 		    memcpy (pstr->mbs + byte_idx, buf, mbclen);
@@ -382,11 +382,11 @@ build_wcs_upper_buffer (re_string_t *pstr)
 	if (BE (mbclen + 2 > 2, 1))
 	  {
 	    wchar_t wcu = wc;
-	    if (iswlower (wc))
+	    if (__iswlower (wc))
 	      {
 		size_t mbcdlen;
 
-		wcu = towupper (wc);
+		wcu = __towupper (wc);
 		mbcdlen = wcrtomb ((char *) buf, wcu, &prev_st);
 		if (BE (mbclen == mbcdlen, 1))
 		  memcpy (pstr->mbs + byte_idx, buf, mbclen);
diff --git a/posix/regex_internal.h b/posix/regex_internal.h
index 7fc6d524e9..154e96999d 100644
--- a/posix/regex_internal.h
+++ b/posix/regex_internal.h
@@ -471,7 +471,7 @@ typedef struct bin_tree_storage_t bin_tree_storage_t;
 
 #define IS_WORD_CHAR(ch) (isalnum (ch) || (ch) == '_')
 #define IS_NEWLINE(ch) ((ch) == NEWLINE_CHAR)
-#define IS_WIDE_WORD_CHAR(ch) (iswalnum (ch) || (ch) == L'_')
+#define IS_WIDE_WORD_CHAR(ch) (__iswalnum (ch) || (ch) == L'_')
 #define IS_WIDE_NEWLINE(ch) ((ch) == WIDE_NEWLINE_CHAR)
 
 #define NOT_SATISFY_PREV_CONSTRAINT(constraint,context) \
diff --git a/wctype/wcfuncs.c b/wctype/wcfuncs.c
index 788fed9a6a..e7c0308d6d 100644
--- a/wctype/wcfuncs.c
+++ b/wctype/wcfuncs.c
@@ -38,6 +38,7 @@
 
 #undef iswalnum
 func (alnum, __ISwalnum)
+libc_hidden_def (__iswalnum)
 libc_hidden_weak (iswalnum)
 #undef iswalpha
 func (alpha, __ISwalpha)
@@ -51,6 +52,7 @@ func (digit, __ISwdigit)
 libc_hidden_weak (iswdigit)
 #undef iswlower
 func (lower, __ISwlower)
+libc_hidden_def (__iswlower)
 libc_hidden_weak (iswlower)
 #undef iswgraph
 func (graph, __ISwgraph)