Update.

2003-01-03  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/generic/ldsodefs.h (_dl_allocate_tls, _dl_deallocate_tls):
	Add rtld_hidden_proto.
	* sysdeps/generic/dl-tls.c (_dl_deallocate_tls): Add rtld_hidden_def.
	(_dl_allocate_tls): Likewise.  Remove INTDEF.

ChangeLog

@@ -1,3 +1,10 @@
+2003-01-03  Jakub Jelinek  <jakub@redhat.com>
+
+	* sysdeps/generic/ldsodefs.h (_dl_allocate_tls, _dl_deallocate_tls):
+	Add rtld_hidden_proto.
+	* sysdeps/generic/dl-tls.c (_dl_deallocate_tls): Add rtld_hidden_def.
+	(_dl_allocate_tls): Likewise.  Remove INTDEF.
+
 2002-07-05  Kaz Kojima  <kkojima@rr.iij4u.or.jp>
 
 	* sysdeps/sh/memcpy.S: Optimize.  Based on a patch by Toshiyasu

linuxthreads/ChangeLog

@@ -1,3 +1,7 @@
+2003-01-03  Jakub Jelinek  <jakub@redhat.com>
+
+	* Makefile ($(objpfx)libpthread.so): Depend on ld.so.
+
 2003-01-02  Ulrich Drepper  <drepper@redhat.com>
 
 	* tst-cancel-wrappers.sh: Exclude sigwait.c as well, it does not have

linuxthreads/Makefile

@@ -185,7 +185,9 @@ endif
 # Depend on libc.so so a DT_NEEDED is generated in the shared objects.
 # This ensures they will load libc.so for needed symbols if loaded by
 # a statically-linked program that hasn't already loaded it.
-$(objpfx)libpthread.so: $(libc-link.so) $(common-objpfx)libc_nonshared.a
+# Depend on ld.so too to get proper versions of ld.so symbols.
+$(objpfx)libpthread.so: $(libc-link.so) $(common-objpfx)libc_nonshared.a \
+			$(if $(filter yes,$(elf)), $(elfobjdir)/ld.so)
 
 # Make sure we link with the thread library.
 ifeq ($(build-shared),yes)

nptl/ChangeLog

@@ -1,3 +1,14 @@
+2003-01-03  Ulrich Drepper  <drepper@redhat.com>
+
+	* atomic.h: Correct definitions of atomic_full_barrier,
+	atomic_read_barrier, atomic_write_barrier.
+
+	* old_pthread_cond_broadcast.c: Make memory allocate and initialization
+	race-free.
+	* old_pthread_cond_signal.c: Likewise.
+	* old_pthread_cond_timedwait.c: Likewise.
+	* old_pthread_cond_wait.c: Likewise.
+
 2003-01-03  Jakub Jelinek  <jakub@redhat.com>
 
 	* Makefile ($(objpfx)libpthread.so): Depend on ld.so.

nptl/Makefile

@@ -212,8 +212,10 @@ $(objpfx)libpthread.so: +preinit += $(objpfx)crti.o
 # Depend on libc.so so a DT_NEEDED is generated in the shared objects.
 # This ensures they will load libc.so for needed symbols if loaded by
 # a statically-linked program that hasn't already loaded it.
+# Depend on ld.so too to get proper versions of ld.so symbols.
 $(objpfx)libpthread.so: $(common-objpfx)libc.so \
-			$(common-objpfx)libc_nonshared.a
+			$(common-objpfx)libc_nonshared.a \
+			$(if $(filter yes,$(elf)), $(elfobjdir)/ld.so)
 
 # Make sure we link with the thread library.
 ifeq ($(build-shared),yes)

nptl/atomic.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -93,17 +93,17 @@
 
 
 #ifndef atomic_full_barrier
-# define full_barrier() __asm ("" ::: "memory")
+# define atomic_full_barrier() __asm ("" ::: "memory")
 #endif
 
 
 #ifndef atomic_read_barrier
-# define read_barrier() full_barrier()
+# define atomic_read_barrier() atomic_full_barrier()
 #endif
 
 
 #ifndef atomic_write_barrier
-# define write_barrier() full_barrier()
+# define atomic_write_barrier() atomic_full_barrier()
 #endif
 
 #endif	/* atomic.h */

nptl/old_pthread_cond_broadcast.c

@@ -20,7 +20,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include "pthreadP.h"
-#include <lowlevellock.h>
+#include <atomic.h>
 #include <shlib-compat.h>
 
 
@@ -31,18 +31,19 @@ __pthread_cond_broadcast_2_0 (cond)
 {
   if (cond->cond == NULL)
     {
-      lll_mutex_lock (cond->lock);
+      pthread_cond_t *newcond;
 
-      /* Check whether the condvar is still not allocated.  */
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-      if (cond->cond == NULL)
+      if (newcond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-
-      lll_mutex_unlock (cond->lock);
-
-      if (cond->cond == NULL)
 	return ENOMEM;
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+
+      atomic_write_barrier ();
+
+      if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
+	/* Somebody else just initialized the condvar.  */
+	free (newcond);
     }
 
   return __pthread_cond_broadcast (cond->cond);

nptl/old_pthread_cond_signal.c

@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include "pthreadP.h"
+#include <atomic.h>
 #include <shlib-compat.h>
 
 
@@ -30,18 +31,19 @@ __pthread_cond_signal_2_0 (cond)
 {
   if (cond->cond == NULL)
     {
-      lll_mutex_lock (cond->lock);
+      pthread_cond_t *newcond;
 
-      /* Check whether the condvar is still not allocated.  */
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-      if (cond->cond == NULL)
+      if (newcond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-
-      lll_mutex_unlock (cond->lock);
-
-      if (cond->cond == NULL)
 	return ENOMEM;
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+
+      atomic_write_barrier ();
+
+      if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
+	/* Somebody else just initialized the condvar.  */
+	free (newcond);
     }
 
   return __pthread_cond_signal (cond->cond);

nptl/old_pthread_cond_timedwait.c

@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include "pthreadP.h"
+#include <atomic.h>
 #include <shlib-compat.h>
 
 
@@ -32,18 +33,19 @@ __pthread_cond_timedwait_2_0 (cond, mutex, abstime)
 {
   if (cond->cond == NULL)
     {
-      lll_mutex_lock (cond->lock);
+      pthread_cond_t *newcond;
 
-      /* Check whether the condvar is still not allocated.  */
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-      if (cond->cond == NULL)
+      if (newcond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-
-      lll_mutex_unlock (cond->lock);
-
-      if (cond->cond == NULL)
 	return ENOMEM;
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+
+      atomic_write_barrier ();
+
+      if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
+	/* Somebody else just initialized the condvar.  */
+	free (newcond);
     }
 
   return __pthread_cond_timedwait (cond->cond, mutex, abstime);

nptl/old_pthread_cond_wait.c

@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include "pthreadP.h"
+#include <atomic.h>
 #include <shlib-compat.h>
 
 
@@ -31,18 +32,19 @@ __pthread_cond_wait_2_0 (cond, mutex)
 {
   if (cond->cond == NULL)
     {
-      lll_mutex_lock (cond->lock);
+      pthread_cond_t *newcond;
 
-      /* Check whether the condvar is still not allocated.  */
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-      if (cond->cond == NULL)
+      if (newcond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
-
-      lll_mutex_unlock (cond->lock);
-
-      if (cond->cond == NULL)
 	return ENOMEM;
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+
+      atomic_write_barrier ();
+
+      if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
+	/* Somebody else just initialized the condvar.  */
+	free (newcond);
     }
 
   return __pthread_cond_wait (cond->cond, mutex);

sysdeps/generic/dl-tls.c

@@ -1,5 +1,5 @@
 /* Thread-local storage handling in the ELF dynamic linker.  Generic version.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -388,7 +388,7 @@ _dl_allocate_tls (void *mem)
 				? _dl_allocate_tls_storage ()
 				: allocate_dtv (mem));
 }
-INTDEF(_dl_allocate_tls)
+rtld_hidden_def (_dl_allocate_tls)
 
 
 void
@@ -409,7 +409,7 @@ _dl_deallocate_tls (void *tcb, bool dealloc_tcb)
       free (tcb);
     }
 }
-
+rtld_hidden_def (_dl_deallocate_tls)
 
 
 # ifdef SHARED

sysdeps/generic/ldsodefs.h

@@ -1,5 +1,5 @@
 /* Run-time dynamic linker data structures for loaded ELF shared objects.
-   Copyright (C) 1995-1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -769,6 +769,7 @@ rtld_hidden_proto (_dl_tls_setup)
 
 /* Allocate memory for static TLS block (unless MEM is nonzero) and dtv.  */
 extern void *_dl_allocate_tls (void *mem) internal_function;
+rtld_hidden_proto (_dl_allocate_tls)
 
 /* Get size and alignment requirements of the static TLS block.  */
 extern void _dl_get_tls_static_info (size_t *sizep, size_t *alignp)
@@ -783,6 +784,7 @@ rtld_hidden_proto (_dl_allocate_tls_init)
 
 /* Deallocate memory allocated with _dl_allocate_tls.  */
 extern void _dl_deallocate_tls (void *tcb, bool dealloc_tcb) internal_function;
+rtld_hidden_proto (_dl_deallocate_tls)
 
 /* Return the symbol address given the map of the module it is in and
    the symbol record.  */