* Versions.def: Add GLIBC_2.4 for libpthread.

ChangeLog

@@ -1,3 +1,7 @@
+2005-12-26  Ulrich Drepper  <drepper@redhat.com>
+
+	* Versions.def: Add GLIBC_2.4 for libpthread.
+
 2005-12-25  Ulrich Drepper  <drepper@redhat.com>
 
 	* stdlib/Makefile ($(objpfx)isomac.out): Move -I.. to the end so

Versions.def

@@ -80,6 +80,7 @@ libpthread {
   GLIBC_2.3.2
   GLIBC_2.3.3
   GLIBC_2.3.4
+  GLIBC_2.4
   GLIBC_PRIVATE
 }
 libresolv {

nptl/ChangeLog

@@ -1,3 +1,56 @@
+2005-12-26  Ulrich Drepper  <drepper@redhat.com>
+
+	* pthreadP.h: Define PTHREAD_MUTEX_ROBUST_PRIVATE_NP,
+	PTHREAD_MUTEX_ROBUST_PRIVATE_RECURSIVE_NP,
+	PTHREAD_MUTEX_ROBUST_PRIVATE_ERRORCHECK_NP,
+	PTHREAD_MUTEX_ROBUST_PRIVATE_ADAPTIVE_NP,
+	PTHREAD_MUTEXATTR_FLAG_ROBUST, PTHREAD_MUTEXATTR_FLAG_PSHARED,
+	and PTHREAD_MUTEXATTR_FLAG_BITS.
+	* descr.h (struct pthread): Add robust_list field and define
+	ENQUEUE_MUTEX and DEQUEUE_MUTEX macros.
+	* pthread_mutexattr_getrobust.c: New file.
+	* pthread_mutexattr_setrobust.c: New file.
+	* pthread_mutex_consistent.c: New file.
+	* sysdeps/pthread/pthread.h: Declare pthread_mutexattr_getrobust,
+	pthread_mutexattr_setrobust, and pthread_mutex_consistent.
+	Define PTHREAD_MUTEX_STALLED_NP and PTHREAD_MUTEX_ROBUST_NP.
+	Adjust pthread_mutex_t initializers.
+	* nptl/sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Add __next
+	field to pthread_mutex_t.
+	* nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Add __next
+	and __prev field to pthread_mutex_t.
+	* Versions [GLIBC_2.4]: Export pthread_mutexattr_getrobust_np,
+	pthread_mutexattr_setrobust_np, and pthread_mutex_consistent_np.
+	* pthread_mutexattr_getpshared.c: Use PTHREAD_MUTEXATTR_FLAG_PSHARED
+	and PTHREAD_MUTEXATTR_FLAG_BITS macros instead of magic numbers.
+	* pthread_mutexattr_gettype.c: Likewise.
+	* pthread_mutexattr_setpshared.c: Likewise.
+	* pthread_mutexattr_settype.c: Likewise.
+	* pthread_mutex_init.c: Reject robust+pshared attribute for now.
+	Initialize mutex kind according to robust flag.
+	* pthread_mutex_lock.c: Implement local robust mutex.
+	* pthread_mutex_timedlock.c: Likewise.
+	* pthread_mutex_trylock.c: Likewise.
+	* pthread_mutex_unlock.c: Likewise.
+	* pthread_create.c (start_thread): Mark robust mutexes which remained
+	locked as dead.
+	* tst-robust1.c: New file.
+	* tst-robust2.c: New file.
+	* tst-robust3.c: New file.
+	* tst-robust4.c: New file.
+	* tst-robust5.c: New file.
+	* tst-robust6.c: New file.
+	* tst-robust7.c: New file.
+	* Makefile (libpthread-routines): Add pthread_mutexattr_getrobust,
+	pthread_mutexattr_setrobust, and pthread_mutex_consistent.
+	(tests): Add tst-robust1, tst-robust2, tst-robust3, tst-robust4,
+	tst-robust5, tst-robust6, and tst-robust7.
+
+	* tst-typesizes.c: New file.
+	* Makefile (tests): Add tst-typesizes.
+
+	* tst-once3.c: More debug output.
+
 2005-12-24  Ulrich Drepper  <drepper@redhat.com>
 
 	* pthread_mutex_trylock.c (__pthread_mutex_trylock): Add break

nptl/Makefile

@@ -116,6 +116,8 @@ libpthread-routines = init vars events version \
 		      pthread_kill_other_threads \
 		      pthread_getaffinity pthread_setaffinity \
 		      pthread_attr_getaffinity pthread_attr_setaffinity \
+		      pthread_mutexattr_getrobust pthread_mutexattr_setrobust \
+		      pthread_mutex_consistent \
 		      cleanup_routine unwind-forcedunwind
 #		      pthread_setuid pthread_seteuid pthread_setreuid \
 #		      pthread_setresuid \
@@ -189,14 +191,17 @@ CFLAGS-pt-system.c = -fexceptions
 omit-deps = $(unix-syscalls:%=ptw-%)
 
 
-tests = tst-attr1 tst-attr2 tst-attr3 \
+tests = tst-typesizes \
+	tst-attr1 tst-attr2 tst-attr3 \
 	tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 tst-mutex5 tst-mutex6 \
 	tst-mutex7 tst-mutex8 tst-mutex9 tst-mutex5a tst-mutex7a \
 	tst-spin1 tst-spin2 tst-spin3 \
 	tst-cond1 tst-cond2 tst-cond3 tst-cond4 tst-cond5 tst-cond6 tst-cond7 \
 	tst-cond8 tst-cond9 tst-cond10 tst-cond11 tst-cond12 tst-cond13 \
 	tst-cond14 tst-cond15 tst-cond16 tst-cond17 tst-cond18 tst-cond19 \
 	tst-cond20 tst-cond21 \
+	tst-robust1 tst-robust2 tst-robust3 tst-robust4 tst-robust5 \
+	tst-robust6 tst-robust7 \
 	tst-rwlock1 tst-rwlock2 tst-rwlock3 tst-rwlock4 tst-rwlock5 \
 	tst-rwlock6 tst-rwlock7 tst-rwlock8 tst-rwlock9 tst-rwlock10 \
 	tst-rwlock11 tst-rwlock12 tst-rwlock13 tst-rwlock14 \

nptl/Versions

@@ -232,6 +232,11 @@ libpthread {
     pthread_setschedprio;
   }
 
+  GLIBC_2.4 {
+    pthread_mutexattr_getrobust_np; pthread_mutexattr_setrobust_np;
+    pthread_mutex_consistent_np;
+  };
+
   GLIBC_PRIVATE {
     __pthread_initialize_minimal;
     __pthread_clock_gettime; __pthread_clock_settime;

nptl/descr.h

@@ -134,6 +134,51 @@ struct pthread
   /* Process ID - thread group ID in kernel speak.  */
   pid_t pid;
 
+  /* List of robust mutexes the thread is holding.  */
+  pthread_mutex_t *robust_list;
+
+#ifdef __PTHREAD_MUTEX_HAVE_PREV
+# define ENQUEUE_MUTEX(mutex) \
+  do {									      \
+    mutex->__data.__next = THREAD_GETMEM (THREAD_SELF, robust_list);	      \
+    THREAD_SETMEM (THREAD_SELF, robust_list, mutex);			      \
+    if (mutex->__data.__next != NULL)					      \
+      mutex->__data.__next->__data.__prev = mutex;			      \
+    mutex->__data.__prev = NULL;					      \
+  } while (0)
+# define DEQUEUE_MUTEX(mutex) \
+  do {									      \
+    if (mutex->__data.__prev == NULL)					      \
+      THREAD_SETMEM (THREAD_SELF, robust_list, mutex->__data.__next);	      \
+    else								      \
+      mutex->__data.__prev->__data.__next = mutex->__data.__next;	      \
+    if (mutex->__data.__next != NULL)					      \
+      mutex->__data.__next->__data.__prev = mutex->__data.__prev;	      \
+    mutex->__data.__prev = NULL;					      \
+    mutex->__data.__next = NULL;					      \
+  } while (0)
+#else
+# define ENQUEUE_MUTEX(mutex) \
+  do {									      \
+    mutex->__data.__next = THREAD_GETMEM (THREAD_SELF, robust_list);	      \
+    THREAD_SETMEM (THREAD_SELF, robust_list, mutex);			      \
+  } while (0)
+# define DEQUEUE_MUTEX(mutex) \
+  do {									      \
+    pthread_mutex_t *runp = THREAD_GETMEM (THREAD_SELF, robust_list);	      \
+    if (runp == mutex)							      \
+      THREAD_SETMEM (THREAD_SELF, robust_list, runp->__data.__next);	      \
+    else								      \
+      {									      \
+	while (runp->__data.__next != mutex)				      \
+	  runp = runp->__data.__next;					      \
+									      \
+	runp->__data.__next = runp->__data.__next->__data.__next;	      \
+	mutex->__data.__next = NULL;					      \
+      }									      \
+  } while (0)
+#endif
+
   /* List of cleanup buffers.  */
   struct _pthread_cleanup_buffer *cleanup;
 

nptl/pthreadP.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -51,6 +51,32 @@
 #endif
 
 
+/* Magic cookie representing robust mutex with dead owner.  */
+#define PTHREAD_MUTEX_OWNERDEAD		INT_MAX
+/* Magic cookie representing not recoverable robust mutex.  */
+#define PTHREAD_MUTEX_NOTRECOVERABLE	(INT_MAX - 1)
+
+
+/* Internal mutex type value.  */
+enum
+{
+  PTHREAD_MUTEX_ROBUST_PRIVATE_NP = 256,
+  PTHREAD_MUTEX_ROBUST_PRIVATE_RECURSIVE_NP
+  = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_ROBUST_PRIVATE_ERRORCHECK_NP
+  = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_ROBUST_PRIVATE_ADAPTIVE_NP
+  = PTHREAD_MUTEX_ROBUST_PRIVATE_NP | PTHREAD_MUTEX_ADAPTIVE_NP
+};
+
+
+/* Flags in mutex attr.  */
+#define PTHREAD_MUTEXATTR_FLAG_ROBUST	0x40000000
+#define PTHREAD_MUTEXATTR_FLAG_PSHARED	0x80000000
+#define PTHREAD_MUTEXATTR_FLAG_BITS \
+  (PTHREAD_MUTEXATTR_FLAG_ROBUST | PTHREAD_MUTEXATTR_FLAG_PSHARED)
+
+
 /* Internal variables.  */
 
 

nptl/pthread_create.c

@@ -310,6 +310,33 @@ start_thread (void *arg)
      the breakpoint reports TD_THR_RUN state rather than TD_THR_ZOMBIE.  */
   atomic_bit_set (&pd->cancelhandling, EXITING_BIT);
 
+  /* If this thread has any robust mutexes locked, handle them now.  */
+  pthread_mutex_t *robust = THREAD_GETMEM (pd, robust_list);
+  if (__builtin_expect (robust != NULL, 0))
+    {
+      do
+	{
+	  pthread_mutex_t *this = robust;
+	  robust = robust->__data.__next;
+
+	  assert (lll_mutex_islocked (this->__data.__lock));
+	  this->__data.__count = 0;
+	  --this->__data.__nusers;
+	  assert (this->__data.__owner != PTHREAD_MUTEX_NOTRECOVERABLE);
+	  this->__data.__owner = PTHREAD_MUTEX_OWNERDEAD;
+	  this->__data.__next = NULL;
+#ifdef __PTHREAD_MUTEX_HAVE_PREV
+	  this->__data.__prev = NULL;
+#endif
+
+	  lll_mutex_unlock (this->__data.__lock);
+	}
+      while (robust != NULL);
+
+      /* Clean up so that the thread descriptor can be reused.  */
+      THREAD_SETMEM (pd, robust_list, NULL);
+    }
+
   /* If the thread is detached free the TCB.  */
   if (IS_DETACHED (pd))
     /* Free the TCB.  */

nptl/pthread_mutex_consistent.c

@@ -0,0 +1,36 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2005.
+
+   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 <errno.h>
+#include <pthreadP.h>
+
+
+int
+pthread_mutex_consistent_np (mutex)
+     pthread_mutex_t *mutex;
+{
+  /* Test whether this is a robust mutex with a dead owner.  */
+  if ((mutex->__data.__kind & PTHREAD_MUTEX_ROBUST_PRIVATE_NP) == 0
+      || mutex->__data.__owner != -THREAD_GETMEM (THREAD_SELF, tid))
+    return EINVAL;
+
+  mutex->__data.__owner = -mutex->__data.__owner;
+
+  return 0;
+}

nptl/pthread_mutex_init.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <assert.h>
+#include <errno.h>
 #include <string.h>
 #include "pthreadP.h"
 
@@ -40,17 +41,26 @@ __pthread_mutex_init (mutex, mutexattr)
 
   imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
 
+  /* Sanity checks.  */
+  // XXX For now we cannot implement robust mutexes if they are shared.
+  if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST) != 0
+      && (imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_PSHARED) != 0)
+    return ENOTSUP;
+
   /* Clear the whole variable.  */
   memset (mutex, '\0', __SIZEOF_PTHREAD_MUTEX_T);
 
   /* Copy the values from the attribute.  */
-  mutex->__data.__kind = imutexattr->mutexkind & ~0x80000000;
+  mutex->__data.__kind = imutexattr->mutexkind & ~PTHREAD_MUTEXATTR_FLAG_BITS;
+  if ((imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST) != 0)
+    mutex->__data.__kind |= PTHREAD_MUTEX_ROBUST_PRIVATE_NP;
 
   /* Default values: mutex not used yet.  */
   // mutex->__count = 0;	already done by memset
   // mutex->__owner = 0;	already done by memset
   // mutex->__nusers = 0;	already done by memset
   // mutex->__spins = 0;	already done by memset
+  // mutex->__next = NULL;	already done by memset
 
   return 0;
 }