Remove the str(n)dup inlines from string/bits/string2.h. Although inlining

calls with constant strings shows a small (~10%) performance gain, strdup is
typically used in error reporting code, so not performance critical.
Remove the now unused __need_malloc_and_calloc related defines from stdlib.h.

Rename existing uses of str(n)dup to __str(n)dup so it no longer needs to be
redirected to a builtin.  Also building GLIBC with -Os now no longer shows
localplt or linkname space failures (partial fix for BZ #15105 and BZ #19463).

        [BZ #15105]
        [BZ #19463]
        * elf/dl-cache.c (_dl_load_cache_lookup): Use __strdup.
        * inet/rcmd.c (rcmd_af): Likewise.
        * inet/rexec.c   (rexec_af): Likewise.
        * intl/dcigettext.c (_LIBC): Likewise.
        * intl/finddomain.c (_nl_find_domain): Use strdup expansion.
        * locale/loadarchive.c (_nl_load_locale_from_archive): Use __strdup.
        * locale/setlocale.c (setlocale): Likewise.
        * posix/spawn_faction_addopen.c
        (posix_spawn_file_actions_addopen): Likewise.
        * stdlib/putenv.c (putenv): Use __strndup.
        * sunrpc/svc_simple.c (__registerrpc): Use __strdup.
        * sysdeps/posix/getaddrinfo.c (gaih_inet): Use __strdup/__strndup.
        * include/stdlib.h (__need_malloc_and_calloc): Remove uses.
        (__Need_M_And_C) Remove define/undef.
        * stdlib/stdlib.h (__need_malloc_and_calloc): Remove uses.
        (__malloc_and_calloc_defined): Remove define.
        * string/bits/string2.h (__strdup): Remove define.
        (strdup): Likewise.
        (__strndup): Likewise.
        (strndup): Likewise.

15 files changed, 41 insertions, 98 deletions

diff --git a/ChangeLog b/ChangeLog
index 4ae0038025..44dec7cb30 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,28 @@
+2017-03-13  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	[BZ #15105]
+	[BZ #19463]
+	* elf/dl-cache.c (_dl_load_cache_lookup): Use __strdup.
+	* inet/rcmd.c (rcmd_af): Likewise.
+	* inet/rexec.c   (rexec_af): Likewise.
+	* intl/dcigettext.c (_LIBC): Likewise.
+	* intl/finddomain.c (_nl_find_domain): Use strdup expansion.
+	* locale/loadarchive.c (_nl_load_locale_from_archive): Use __strdup.
+	* locale/setlocale.c (setlocale): Likewise.
+	* posix/spawn_faction_addopen.c
+	(posix_spawn_file_actions_addopen): Likewise.
+	* stdlib/putenv.c (putenv): Use __strndup.
+	* sunrpc/svc_simple.c (__registerrpc): Use __strdup.
+	* sysdeps/posix/getaddrinfo.c (gaih_inet): Use __strdup/__strndup.
+	* include/stdlib.h (__need_malloc_and_calloc): Remove uses.
+	(__Need_M_And_C) Remove define/undef.
+	* stdlib/stdlib.h (__need_malloc_and_calloc): Remove uses.
+	(__malloc_and_calloc_defined): Remove define.
+	* string/bits/string2.h (__strdup): Remove define.
+	(strdup): Likewise.
+	(__strndup): Likewise.
+	(strndup): Likewise.
+
 2017-03-13  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/bits/in.h (IPV6_AUTOFLOWLABEL): New
diff --git a/elf/dl-cache.c b/elf/dl-cache.c
index 1ac7524c3e..017c78aae3 100644
--- a/elf/dl-cache.c
+++ b/elf/dl-cache.c
@@ -302,7 +302,7 @@ _dl_load_cache_lookup (const char *name)
   char *temp;
   temp = alloca (strlen (best) + 1);
   strcpy (temp, best);
-  return strdup (temp);
+  return __strdup (temp);
 }
 
 #ifndef MAP_COPY
diff --git a/include/stdlib.h b/include/stdlib.h
index 352339e859..929cead59a 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -1,16 +1,12 @@
 #ifndef _STDLIB_H
 
-#ifdef __need_malloc_and_calloc
-#define __Need_M_And_C
-#endif
-
 #ifndef _ISOMAC
 # include <stddef.h>
 #endif
 #include <stdlib/stdlib.h>
 
 /* Now define the internal interfaces.  */
-#if !defined __Need_M_And_C && !defined _ISOMAC
+#if !defined _ISOMAC
 # include <sys/stat.h>
 
 __BEGIN_DECLS
@@ -269,6 +265,4 @@ __END_DECLS
 
 #endif
 
-#undef __Need_M_And_C
-
 #endif  /* include/stdlib.h */
diff --git a/inet/rcmd.c b/inet/rcmd.c
index 8613d96764..b7cc7a82ba 100644
--- a/inet/rcmd.c
+++ b/inet/rcmd.c
@@ -149,7 +149,7 @@ rcmd_af (char **ahost, u_short rport, const char *locuser, const char *remuser,
 
 	if (res->ai_canonname){
 		free (ahostbuf);
-		ahostbuf = strdup (res->ai_canonname);
+		ahostbuf = __strdup (res->ai_canonname);
 		if (ahostbuf == NULL) {
 			__fxprintf(NULL, "%s",
 				   _("rcmd: Cannot allocate memory\n"));
diff --git a/inet/rexec.c b/inet/rexec.c
index 24ac4b11b6..43fb67bcf2 100644
--- a/inet/rexec.c
+++ b/inet/rexec.c
@@ -73,7 +73,7 @@ rexec_af (char **ahost, int rport, const char *name, const char *pass,
 
 	if (res0->ai_canonname){
 		free (ahostbuf);
-		ahostbuf = strdup (res0->ai_canonname);
+		ahostbuf = __strdup (res0->ai_canonname);
 		if (ahostbuf == NULL) {
 			perror ("rexec: strdup");
 			return (-1);
diff --git a/intl/dcigettext.c b/intl/dcigettext.c
index 95fa72b1c5..3843b7cbdf 100644
--- a/intl/dcigettext.c
+++ b/intl/dcigettext.c
@@ -131,6 +131,7 @@ extern int errno;
 /* Rename the non ANSI C functions.  This is required by the standard
    because some ANSI C functions will require linking with this object
    file and the name space must not be polluted.  */
+# define strdup __strdup
 # define getcwd __getcwd
 # ifndef stpcpy
 #  define stpcpy __stpcpy
diff --git a/intl/finddomain.c b/intl/finddomain.c
index cb61a0c8d6..88fd880dbc 100644
--- a/intl/finddomain.c
+++ b/intl/finddomain.c
@@ -124,18 +124,12 @@ _nl_find_domain (const char *dirname, char *locale,
   alias_value = _nl_expand_alias (locale);
   if (alias_value != NULL)
     {
-#if defined _LIBC || defined HAVE_STRDUP
-      locale = strdup (alias_value);
-      if (locale == NULL)
-	return NULL;
-#else
       size_t len = strlen (alias_value) + 1;
       locale = (char *) malloc (len);
       if (locale == NULL)
 	return NULL;
 
       memcpy (locale, alias_value, len);
-#endif
     }
 
   /* Now we determine the single parts of the locale name.  First
diff --git a/locale/loadarchive.c b/locale/loadarchive.c
index fc6fb32a9d..e6e1a05d2e 100644
--- a/locale/loadarchive.c
+++ b/locale/loadarchive.c
@@ -462,7 +462,7 @@ _nl_load_locale_from_archive (int category, const char **namep)
   if (__glibc_unlikely (lia == NULL))
     return NULL;
 
-  lia->name = strdup (*namep);
+  lia->name = __strdup (*namep);
   if (__glibc_unlikely (lia->name == NULL))
     {
       free (lia);
diff --git a/locale/setlocale.c b/locale/setlocale.c
index 1603ef306a..19acc4b2c7 100644
--- a/locale/setlocale.c
+++ b/locale/setlocale.c
@@ -283,7 +283,7 @@ setlocale (int category, const char *locale)
       if (__glibc_unlikely (strchr (locale, ';') != NULL))
 	{
 	  /* This is a composite name.  Make a copy and split it up.  */
-	  locale_copy = strdup (locale);
+	  locale_copy = __strdup (locale);
 	  if (__glibc_unlikely (locale_copy == NULL))
 	    {
 	      __libc_rwlock_unlock (__libc_setlocale_lock);
diff --git a/posix/spawn_faction_addopen.c b/posix/spawn_faction_addopen.c
index 95111684bc..cbb3584345 100644
--- a/posix/spawn_faction_addopen.c
+++ b/posix/spawn_faction_addopen.c
@@ -34,7 +34,7 @@ posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *file_actions,
   if (!__spawn_valid_fd (fd))
     return EBADF;
 
-  char *path_copy = strdup (path);
+  char *path_copy = __strdup (path);
   if (path_copy == NULL)
     return ENOMEM;
 
diff --git a/stdlib/putenv.c b/stdlib/putenv.c
index 85890fec26..c0488fc505 100644
--- a/stdlib/putenv.c
+++ b/stdlib/putenv.c
@@ -60,7 +60,7 @@ putenv (char *string)
       int use_malloc = !__libc_use_alloca (name_end - string + 1);
       if (__builtin_expect (use_malloc, 0))
 	{
-	  name = strndup (string, name_end - string);
+	  name = __strndup (string, name_end - string);
 	  if (name == NULL)
 	    return -1;
 	}
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 292c6a2f05..7cfbcafe79 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -25,16 +25,13 @@
 #include <bits/libc-header-start.h>
 
 /* Get size_t, wchar_t and NULL from <stddef.h>.  */
-#define		__need_size_t
-#ifndef __need_malloc_and_calloc
-# define	__need_wchar_t
-# define	__need_NULL
-#endif
+#define __need_size_t
+#define __need_wchar_t
+#define __need_NULL
 #include <stddef.h>
 
 __BEGIN_DECLS
 
-#ifndef __need_malloc_and_calloc
 #define	_STDLIB_H	1
 
 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
@@ -434,10 +431,6 @@ extern int lcong48_r (unsigned short int __param[7],
 # endif	/* Use misc.  */
 #endif	/* Use misc or X/Open.  */
 
-#endif /* don't just need malloc and calloc */
-
-#ifndef __malloc_and_calloc_defined
-# define __malloc_and_calloc_defined
 __BEGIN_NAMESPACE_STD
 /* Allocate SIZE bytes of memory.  */
 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
@@ -445,9 +438,7 @@ extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
 extern void *calloc (size_t __nmemb, size_t __size)
      __THROW __attribute_malloc__ __wur;
 __END_NAMESPACE_STD
-#endif
 
-#ifndef __need_malloc_and_calloc
 __BEGIN_NAMESPACE_STD
 /* Re-allocate the previously allocated block
    in PTR, making the new block SIZE bytes long.  */
@@ -944,9 +935,6 @@ extern int ttyslot (void) __THROW;
 # include <bits/stdlib-ldbl.h>
 #endif
 
-#endif /* don't just need malloc and calloc */
-#undef __need_malloc_and_calloc
-
 __END_DECLS
 
 #endif /* stdlib.h  */
diff --git a/string/bits/string2.h b/string/bits/string2.h
index 2d4eb41589..6a26e2bc68 100644
--- a/string/bits/string2.h
+++ b/string/bits/string2.h
@@ -112,65 +112,6 @@
 #endif
 
 
-/* We need the memory allocation functions for inline strdup().
-   Referring to stdlib.h (even minimally) is not allowed
-   in any of the tight standards compliant modes.  */
-#ifdef __USE_MISC
-
-# if !defined _HAVE_STRING_ARCH_strdup || !defined _HAVE_STRING_ARCH_strndup
-#  define __need_malloc_and_calloc
-#  include <stdlib.h>
-# endif
-
-# ifndef _HAVE_STRING_ARCH_strdup
-
-extern char *__strdup (const char *__string) __THROW __attribute_malloc__;
-#  define __strdup(s) \
-  (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s)	      \
-		  ? (((const char *) (s))[0] == '\0'			      \
-		     ? (char *) calloc ((size_t) 1, (size_t) 1)		      \
-		     : ({ size_t __len = strlen (s) + 1;		      \
-			  char *__retval = (char *) malloc (__len);	      \
-			  if (__retval != NULL)				      \
-			    __retval = (char *) memcpy (__retval, s, __len);  \
-			  __retval; }))					      \
-		  : __strdup (s)))
-
-#  if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
-#   define strdup(s) __strdup (s)
-#  endif
-# endif
-
-# ifndef _HAVE_STRING_ARCH_strndup
-
-extern char *__strndup (const char *__string, size_t __n)
-     __THROW __attribute_malloc__;
-#  define __strndup(s, n) \
-  (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s)	      \
-		  ? (((const char *) (s))[0] == '\0'			      \
-		     ? (char *) calloc ((size_t) 1, (size_t) 1)		      \
-		     : ({ size_t __len = strlen (s) + 1;		      \
-			  size_t __n = (n);				      \
-			  char *__retval;				      \
-			  if (__n < __len)				      \
-			    __len = __n + 1;				      \
-			  __retval = (char *) malloc (__len);		      \
-			  if (__retval != NULL)				      \
-			    {						      \
-			      __retval[__len - 1] = '\0';		      \
-			      __retval = (char *) memcpy (__retval, s,	      \
-							  __len - 1);	      \
-			    }						      \
-			  __retval; }))					      \
-		  : __strndup (s, n)))
-
-#  ifdef __USE_XOPEN2K8
-#   define strndup(s, n) __strndup (s, n)
-#  endif
-# endif
-
-#endif /* Use misc. or use GNU.  */
-
 #ifndef _FORCE_INLINES
 # undef __STRING_INLINE
 #endif
diff --git a/sunrpc/svc_simple.c b/sunrpc/svc_simple.c
index baa177eec0..acc9b9db14 100644
--- a/sunrpc/svc_simple.c
+++ b/sunrpc/svc_simple.c
@@ -87,7 +87,7 @@ __registerrpc (u_long prognum, u_long versnum, u_long procnum,
       transp = svcudp_create (RPC_ANYSOCK);
       if (transp == NULL)
 	{
-	  buf = strdup (_("couldn't create an rpc server\n"));
+	  buf = __strdup (_("couldn't create an rpc server\n"));
 	  goto err_out;
 	}
     }
@@ -103,7 +103,7 @@ __registerrpc (u_long prognum, u_long versnum, u_long procnum,
   pl = (struct proglst_ *) malloc (sizeof (struct proglst_));
   if (pl == NULL)
     {
-      buf = strdup (_("registerrpc: out of memory\n"));
+      buf = __strdup (_("registerrpc: out of memory\n"));
       goto err_out;
     }
   pl->p_progname = progname;
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 43eb31365e..eed7264850 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -536,7 +536,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 		      }
 		    else
 		      {
-			namebuf = strndup (name, scope_delim - name);
+			namebuf = __strndup (name, scope_delim - name);
 			if (namebuf == NULL)
 			  {
 			    assert (!malloc_name);
@@ -1141,7 +1141,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 		  malloc_canonbuf = false;
 		else
 		  {
-		    canon = strdup (canon);
+		    canon = __strdup (canon);
 		    if (canon == NULL)
 		      {
 			result = -EAI_MEMORY;