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.

7 files changed, 58 insertions, 38 deletions

diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index e7173f9e4f..62744b1e37 100644
--- a/nptl/ChangeLog
+++ b/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.
diff --git a/nptl/Makefile b/nptl/Makefile
index 2a68c2e566..ceee78758c 100644
--- a/nptl/Makefile
+++ b/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)
diff --git a/nptl/atomic.h b/nptl/atomic.h
index 927e0fe5ac..0464705691 100644
--- a/nptl/atomic.h
+++ b/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 */
diff --git a/nptl/old_pthread_cond_broadcast.c b/nptl/old_pthread_cond_broadcast.c
index a9713f5e1b..05f24bb52b 100644
--- a/nptl/old_pthread_cond_broadcast.c
+++ b/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.  */
-      if (cond->cond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      if (newcond == NULL)
+	return ENOMEM;
 
-      lll_mutex_unlock (cond->lock);
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
 
-      if (cond->cond == NULL)
-	return ENOMEM;
+      atomic_write_barrier ();
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      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);
diff --git a/nptl/old_pthread_cond_signal.c b/nptl/old_pthread_cond_signal.c
index 952ee6de41..717a33912b 100644
--- a/nptl/old_pthread_cond_signal.c
+++ b/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.  */
-      if (cond->cond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      if (newcond == NULL)
+	return ENOMEM;
 
-      lll_mutex_unlock (cond->lock);
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
 
-      if (cond->cond == NULL)
-	return ENOMEM;
+      atomic_write_barrier ();
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      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);
diff --git a/nptl/old_pthread_cond_timedwait.c b/nptl/old_pthread_cond_timedwait.c
index 7b0faa78d2..ef4db9e6e8 100644
--- a/nptl/old_pthread_cond_timedwait.c
+++ b/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.  */
-      if (cond->cond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      if (newcond == NULL)
+	return ENOMEM;
 
-      lll_mutex_unlock (cond->lock);
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
 
-      if (cond->cond == NULL)
-	return ENOMEM;
+      atomic_write_barrier ();
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      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);
diff --git a/nptl/old_pthread_cond_wait.c b/nptl/old_pthread_cond_wait.c
index 493f00a3eb..b124b260d4 100644
--- a/nptl/old_pthread_cond_wait.c
+++ b/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.  */
-      if (cond->cond == NULL)
-	cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+      if (newcond == NULL)
+	return ENOMEM;
 
-      lll_mutex_unlock (cond->lock);
+      *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
 
-      if (cond->cond == NULL)
-	return ENOMEM;
+      atomic_write_barrier ();
 
-      *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+      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);