Update.

2003-07-22  Jakub Jelinek  <jakub@redhat.com>

	* include/resolv.h (__resp): Declare.  Define to __libc_resp
	if in libc.so.
	(_res): If USE___THREAD, define to (*__resp).
	* resolv/res_libc.c (_res): Normal .bss variable with compat_symbol
	even if USE___THREAD.
	(__resp): New __thread variable.
	(__libc_resp): New alias.
	* resolv/Versions (libc): Export _res@GLIBC_2.0 even if
	USE_TLS && HAVE___THREAD.  Export __resp@@GLIBC_PRIVATE.
	* sysdeps/generic/res-state.c (__res_state): Return __resp
	if USE___THREAD.

8 files changed, 116 insertions, 3 deletions

diff --git a/linuxthreads/Makefile b/linuxthreads/Makefile
index 3d45b81f19..9bb38536fc 100644
--- a/linuxthreads/Makefile
+++ b/linuxthreads/Makefile
@@ -119,8 +119,17 @@ endif
 
 ifeq (yes,$(build-shared))
 tests-nodelete-yes = unload
+tests += tst-_res1
 endif
 
+modules-names = tst-_res1mod1 tst-_res1mod2
+extra-objs += $(addsuffix .os,$(strip $(modules-names)))
+test-extras += $(modules-names)
+test-modules = $(addprefix $(objpfx),$(addsuffix .so,$(modules-names)))
+
+$(test-modules): $(objpfx)%.so: $(objpfx)%.os $(common-objpfx)shlib.lds
+	$(build-module)
+
 all: # Make this the default target; it will be defined in Rules.
 
 # What we install as libpthread.so for programs to link against is in fact a
@@ -288,6 +297,11 @@ otherlibs += $(nssobjdir)/libnss_files.a $(resolvobjdir)/libnss_dns.a \
              $(resolvobjdir)/libresolv.a
 endif
 
+ifeq (yes,$(build-shared))
+$(objpfx)tst-_res1mod2.so: $(objpfx)tst-_res1mod1.so
+$(objpfx)tst-_res1: $(objpfx)tst-_res1mod2.so $(shared-thread-library)
+endif
+
 ifeq (no,$(cross-compiling))
 ifeq (yes,$(build-shared))
 tests: $(objpfx)tst-signal.out $(objpfx)tst-cancel-wrappers.out
diff --git a/linuxthreads/descr.h b/linuxthreads/descr.h
index a9aaa55122..f00278cb51 100644
--- a/linuxthreads/descr.h
+++ b/linuxthreads/descr.h
@@ -163,8 +163,8 @@ struct _pthread_descr_struct
   int * p_h_errnop;             /* pointer to used h_errno variable */
   int p_h_errno;                /* error returned by last netdb function */
   struct __res_state *p_resp;	/* Pointer to resolver state */
-  struct __res_state p_res;	/* per-thread resolver state */
 #endif
+  struct __res_state p_res;	/* per-thread resolver state */
   int p_userstack;		/* nonzero if the user provided the stack */
   void *p_guardaddr;		/* address of guard area or NULL */
   size_t p_guardsize;		/* size of guard area */
diff --git a/linuxthreads/libc-tls-loc.c b/linuxthreads/libc-tls-loc.c
index a8d1b4e7fd..a0a4b1b07d 100644
--- a/linuxthreads/libc-tls-loc.c
+++ b/linuxthreads/libc-tls-loc.c
@@ -43,7 +43,7 @@ __h_errno_location (void)
 struct __res_state *
 __res_state (void)
 {
-  return &_res;
+  return __resp;
 }
 
 #endif
diff --git a/linuxthreads/manager.c b/linuxthreads/manager.c
index 91620a2cc4..9620b8b39c 100644
--- a/linuxthreads/manager.c
+++ b/linuxthreads/manager.c
@@ -28,6 +28,7 @@
 #include <sys/time.h>
 #include <sys/wait.h>           /* for waitpid macros */
 #include <locale.h>		/* for __uselocale */
+#include <resolv.h>		/* for __resp */
 
 #include <ldsodefs.h>
 #include "pthread.h"
@@ -287,6 +288,9 @@ pthread_start_thread(void *arg)
   /* Initialize thread-locale current locale to point to the global one.
      With __thread support, the variable's initializer takes care of this.  */
   __uselocale (LC_GLOBAL_LOCALE);
+#else
+  /* Initialize __resp.  */
+  __resp = &self->p_resp;
 #endif
   /* Make gdb aware of new thread */
   if (__pthread_threads_debug && __pthread_sig_debug > 0) {
diff --git a/linuxthreads/sysdeps/pthread/res-state.c b/linuxthreads/sysdeps/pthread/res-state.c
index 823101819d..016e20b4ef 100644
--- a/linuxthreads/sysdeps/pthread/res-state.c
+++ b/linuxthreads/sysdeps/pthread/res-state.c
@@ -39,7 +39,9 @@ __res_state (void)
       pthread_descr self = thread_self();
       return LIBC_THREAD_GETMEM (self, p_resp);
     }
-#endif
   return &_res;
+#else
+  return __resp;
+#endif
 }
 libc_hidden_def (__res_state)
diff --git a/linuxthreads/tst-_res1.c b/linuxthreads/tst-_res1.c
new file mode 100644
index 0000000000..651e3cc40d
--- /dev/null
+++ b/linuxthreads/tst-_res1.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* Test whether _res in glibc 2.1.x and earlier (before __res_state()
+   was introduced) works.  Portable programs should never do the
+   dirty things below.  */
+
+#include <pthread.h>
+#include <resolv.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+void *tf (void *resp)
+{
+  if (resp == &_res || resp == __res_state ())
+    abort ();
+  _res.retry = 24;
+  return NULL;
+}
+
+void do_test (struct __res_state *resp)
+{
+  if (resp != &_res || resp != __res_state ())
+    abort ();
+  if (_res.retry != 12)
+    abort ();
+}
+
+int main (void)
+{
+#undef _res
+  extern struct __res_state _res;
+  pthread_t th;
+
+  _res.retry = 12;
+  if (pthread_create (&th, NULL, tf, &_res) != 0)
+    {
+      puts ("create failed");
+      exit (1);
+    }
+
+  do_test (&_res);
+
+  if (pthread_join (th, NULL) != 0)
+    {
+      puts ("join failed");
+      exit (1);
+    }
+
+  do_test (&_res);
+
+  exit (0);
+}
diff --git a/linuxthreads/tst-_res1mod1.c b/linuxthreads/tst-_res1mod1.c
new file mode 100644
index 0000000000..73b190e6ba
--- /dev/null
+++ b/linuxthreads/tst-_res1mod1.c
@@ -0,0 +1,23 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <resolv.h>
+#undef _res
+
+struct __res_state _res;
diff --git a/linuxthreads/tst-_res1mod2.c b/linuxthreads/tst-_res1mod2.c
new file mode 100644
index 0000000000..d2a3509c6d
--- /dev/null
+++ b/linuxthreads/tst-_res1mod2.c
@@ -0,0 +1 @@
+/* Nothing.  */