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[PATCH v3] New functions pthread_[sg]etattr_default_np for default thread attributes


Hi,

Here's the updated patch now, with the test case covering all
attributes that could be set as default.  I have renamed the functions
to pthread_{g,s}etattr_default_np as suggested, hence the change in
the subject as well.

Siddhesh

ChangeLog:

	* Versions.def (libpthread): Add GLIBC_2.18.
	* sysdeps/unix/sysv/linux/i386/nptl/libpthread.abilist: Add
	GLIBC_2.18
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/sh/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/nptl/libpthread.abilist:
	Likewise.

nptl/ChangeLog:

	* Makefile (libpthread-routines): Add
	pthread_setattr_default_np and pthread_getattr_default_np.
	(tests): Add tst-default-attr.
	* Versions (libpthread): Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_setattr_default_np and
	pthread_getattr_default_np.
	* nptl-init.c (__pthread_initialize_minimal_internal):
	Initialize default guardsize.
	* pthread_getattr_default_np.c: New file.
	* pthread_setattr_default_np.c: New file.
	* pthread_create.c (__pthread_create_2_1): Allow default flags
	to be used.
	* sysdeps/pthread/pthread.h (pthread_getattr_default_np,
	pthread_setattr_default_np): Declare.
	* tst-default-attr.c: New test case.

ChangeLog.tile

	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/nptl/libpthread.abilist:
	Likewise.

ChangeLog.m68k

	* sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.
	* sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libpthread.abilist:
	Likewise.

ChangeLog.ia64

	* sysdeps/unix/sysv/linux/ia64/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.

ChangeLog.aarch64

	* sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.

ChangeLog.alpha

	* sysdeps/unix/sysv/linux/alpha/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.

ChangeLog.powerpc

	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.

ChangeLog.arm

	* sysdeps/unix/sysv/linux/arm/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.

ChangeLog.mips

	* sysdeps/unix/sysv/linux/mips/mips32/nptl/libpthread.abilist:
	Add GLIBC_2.18.
	(GLIBC_2.18): Add pthread_getattr_default_np and
	pthread_setattr_default_np.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libpthread.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libpthread.abilist:
	Likewise.


diff --git a/Versions.def b/Versions.def
index 0462239..0854e6e 100644
--- a/Versions.def
+++ b/Versions.def
@@ -102,6 +102,7 @@ libpthread {
   GLIBC_2.6
   GLIBC_2.11
   GLIBC_2.12
+  GLIBC_2.18
   GLIBC_PRIVATE
 }
 libresolv {
diff --git a/nptl/Makefile b/nptl/Makefile
index 7fa991b..f1fbf25 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -125,7 +125,8 @@ libpthread-routines = nptl-init vars events version \
 		      pthread_mutexattr_setprioceiling tpp \
 		      pthread_mutex_getprioceiling \
 		      pthread_mutex_setprioceiling \
-		      pthread_setname pthread_getname
+		      pthread_setname pthread_getname \
+		      pthread_setattr_default_np pthread_getattr_default_np
 #		      pthread_setuid pthread_seteuid pthread_setreuid \
 #		      pthread_setresuid \
 #		      pthread_setgid pthread_setegid pthread_setregid \
@@ -201,7 +202,7 @@ CFLAGS-pt-system.c = -fexceptions
 
 
 tests = tst-typesizes \
-	tst-attr1 tst-attr2 tst-attr3 \
+	tst-attr1 tst-attr2 tst-attr3 tst-default-attr \
 	tst-mutex1 tst-mutex2 tst-mutex3 tst-mutex4 tst-mutex5 tst-mutex6 \
 	tst-mutex7 tst-mutex8 tst-mutex9 tst-mutex5a tst-mutex7a \
 	tst-mutexpi1 tst-mutexpi2 tst-mutexpi3 tst-mutexpi4 tst-mutexpi5 \
diff --git a/nptl/Versions b/nptl/Versions
index 6a10375..bb11277 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -252,6 +252,11 @@ libpthread {
     pthread_setname_np; pthread_getname_np;
   };
 
+  GLIBC_2.18 {
+    pthread_getattr_default_np;
+    pthread_setattr_default_np;
+  }
+
   GLIBC_PRIVATE {
     __pthread_initialize_minimal;
     __pthread_clock_gettime; __pthread_clock_settime;
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 56bf257..08e2fa1 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -357,8 +357,19 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
   assert (TCB_ALIGNMENT >= STACK_ALIGN);
 
   /* Get the stack size from the attribute if it is set.  Otherwise we
-     use the default we determined at start time.  */
-  size = attr->stacksize ?: __default_pthread_attr.stacksize;
+     use the default we determined at start time.  Our lock attempt here will
+     never trip with the lock in pthread_create because the stacksize in
+     __default_pthread_attr_lock will never be zero.  So if we deadlock on
+     ourselves here, it is because a bug led to
+     __default_pthread_attr.stacksize being zero.  */
+  if (attr->stacksize)
+    size = attr->stacksize;
+  else
+    {
+      lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
+      size = __default_pthread_attr.stacksize;
+      lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
+    }
 
   /* Get memory for the stack.  */
   if (__builtin_expect (attr->flags & ATTR_FLAG_STACKADDR, 0))
@@ -919,8 +930,9 @@ __reclaim_stacks (void)
 
   in_flight_stack = 0;
 
-  /* Initialize the lock.  */
+  /* Initialize locks.  */
   stack_cache_lock = LLL_LOCK_INITIALIZER;
+  __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
 }
 
 
diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c
index 63fb729..4e99a38 100644
--- a/nptl/nptl-init.c
+++ b/nptl/nptl-init.c
@@ -423,8 +423,10 @@ __pthread_initialize_minimal_internal (void)
 
   /* Round the resource limit up to page size.  */
   limit.rlim_cur = (limit.rlim_cur + pagesz - 1) & -pagesz;
+  lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
   __default_pthread_attr.stacksize = limit.rlim_cur;
   __default_pthread_attr.guardsize = GLRO (dl_pagesize);
+  lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
 
 #ifdef SHARED
   /* Transfer the old value from the dynamic linker's internal location.  */
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index fd52b07..7883fdf 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -149,6 +149,7 @@ enum
 
 /* Default pthread attributes.  */
 extern struct pthread_attr __default_pthread_attr attribute_hidden;
+extern int __default_pthread_attr_lock attribute_hidden;
 
 /* Size and alignment of static TLS block.  */
 extern size_t __static_tls_size attribute_hidden;
diff --git a/nptl/pthread_attr_getstacksize.c b/nptl/pthread_attr_getstacksize.c
index 42d3f8f..bf0070d 100644
--- a/nptl/pthread_attr_getstacksize.c
+++ b/nptl/pthread_attr_getstacksize.c
@@ -32,7 +32,14 @@ __pthread_attr_getstacksize (attr, stacksize)
 
   /* If the user has not set a stack size we return what the system
      will use as the default.  */
-  *stacksize = iattr->stacksize ?: __default_pthread_attr.stacksize;
+  if (iattr->stacksize)
+    *stacksize = iattr->stacksize;
+  else
+    {
+      lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
+      *stacksize = __default_pthread_attr.stacksize;
+      lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
+    }
 
   return 0;
 }
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index b78bd95..24735e7 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -450,17 +450,25 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
 
   const struct pthread_attr *iattr = (struct pthread_attr *) attr;
   if (iattr == NULL)
-    /* Is this the best idea?  On NUMA machines this could mean
-       accessing far-away memory.  */
-    iattr = &__default_pthread_attr;
+    {
+      /* Is this the best idea?  On NUMA machines this could mean
+         accessing far-away memory.  */
+      iattr = &__default_pthread_attr;
+      lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
+    }
 
   struct pthread *pd = NULL;
   int err = ALLOCATE_STACK (iattr, &pd);
+  int retval = 0;
+
   if (__builtin_expect (err != 0, 0))
     /* Something went wrong.  Maybe a parameter of the attributes is
        invalid or we could not allocate memory.  Note we have to
        translate error codes.  */
-    return err == ENOMEM ? EAGAIN : err;
+    {
+      retval = err == ENOMEM ? EAGAIN : err;
+      goto out;
+    }
 
 
   /* Initialize the TCB.  All initializations with zero should be
@@ -511,8 +519,7 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
 #endif
 
   /* Determine scheduling parameters for the thread.  */
-  if (attr != NULL
-      && __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0)
+  if (__builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0)
       && (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0)
     {
       INTERNAL_SYSCALL_DECL (scerr);
@@ -551,7 +558,8 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
 
 	  __deallocate_stack (pd);
 
-	  return EINVAL;
+	  retval = EINVAL;
+	  goto out;
 	}
     }
 
@@ -561,7 +569,13 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
   LIBC_PROBE (pthread_create, 4, newthread, attr, start_routine, arg);
 
   /* Start the thread.  */
-  return create_thread (pd, iattr, STACK_VARIABLES_ARGS);
+  retval = create_thread (pd, iattr, STACK_VARIABLES_ARGS);
+
+ out:
+  if (attr == NULL)
+    lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
+
+  return retval;
 }
 versioned_symbol (libpthread, __pthread_create_2_1, pthread_create, GLIBC_2_1);
 
diff --git a/nptl/pthread_getattr_default_np.c b/nptl/pthread_getattr_default_np.c
new file mode 100644
index 0000000..f3a6b47
--- /dev/null
+++ b/nptl/pthread_getattr_default_np.c
@@ -0,0 +1,37 @@
+/* Get the default attributes used by pthread_create in the process.
+   Copyright (C) 2013 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
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <pthreadP.h>
+#include <assert.h>
+
+int
+pthread_getattr_default_np (pthread_attr_t *out)
+{
+  struct pthread_attr *real_out;
+
+  assert (sizeof (*out) >= sizeof (struct pthread_attr));
+  real_out = (struct pthread_attr *) out;
+
+  lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
+  *real_out = __default_pthread_attr;
+  lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
+
+  return 0;
+}
diff --git a/nptl/pthread_setattr_default_np.c b/nptl/pthread_setattr_default_np.c
new file mode 100644
index 0000000..b897d93
--- /dev/null
+++ b/nptl/pthread_setattr_default_np.c
@@ -0,0 +1,110 @@
+/* Set the default attributes to be used by pthread_create in the process.
+   Copyright (C) 2013 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
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <pthreadP.h>
+#include <assert.h>
+
+int
+pthread_setattr_default_np (const pthread_attr_t *in)
+{
+  struct pthread_attr *real_in, attrs;
+  int ret;
+
+  assert (sizeof (*in) >= sizeof (struct pthread_attr));
+  real_in = (struct pthread_attr *) in;
+
+  /* Catch invalid values.  */
+  int policy = real_in->schedpolicy;
+
+  ret = check_sched_policy_attr (policy);
+  if (ret)
+    return ret;
+
+  struct sched_param *param = &real_in->schedparam;
+
+  if (param->sched_priority > 0)
+    {
+      ret = check_sched_priority_attr (param->sched_priority, policy);
+
+      if (ret)
+        return ret;
+    }
+
+  ret = check_cpuset_attr (real_in->cpuset, real_in->cpusetsize);
+  if (ret)
+    return ret;
+
+  /* stacksize == 0 is fine.  It means that we don't change the current
+     value.  */
+  if (real_in->stacksize != 0)
+    {
+      ret = check_stacksize_attr (real_in->stacksize);
+      if (ret)
+        return ret;
+    }
+  else
+    real_in->stacksize = __default_pthread_attr.stacksize;
+
+  /* Having a default stack address is wrong.  */
+  if (real_in->flags & ATTR_FLAG_STACKADDR)
+    return EINVAL;
+
+  attrs = *real_in;
+
+  /* Mantain stacksize as a non-zero value.  This is a computed fallback that
+     we get on library initialization, so we don't want to overwrite it unless
+     there is a valid value to replace it.  */
+  if (real_in->stacksize > 0)
+    attrs.stacksize = real_in->stacksize;
+
+  /* Now take the lock because we start writing into
+     __default_pthread_attr.  */
+  lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
+
+  /* Free the cpuset if the input is 0.  Otherwise copy in the cpuset
+     contents.  */
+  if (attrs.cpuset == NULL || attrs.cpusetsize == 0)
+    free (__default_pthread_attr.cpuset);
+  else if (attrs.cpusetsize != __default_pthread_attr.cpusetsize)
+    {
+      /* This may look wrong at first sight, but it isn't.  We're freeing
+	 __default_pthread_attr.cpuset and allocating to attrs.cpuset because
+	 we'll copy over all of attr to __default_pthread_attr later.  */
+      void *newp = (cpu_set_t *) realloc (__default_pthread_attr.cpuset,
+					  attrs.cpusetsize);
+
+      if (newp == NULL)
+	{
+	  ret = ENOMEM;
+	  goto out;
+	}
+
+      attrs.cpuset = newp;
+    }
+  else
+    attrs.cpuset = __default_pthread_attr.cpuset;
+
+  memcpy (attrs.cpuset, real_in->cpuset, real_in->cpusetsize);
+  __default_pthread_attr = attrs;
+
+ out:
+  lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
+  return ret;
+}
diff --git a/nptl/sysdeps/pthread/pthread.h b/nptl/sysdeps/pthread/pthread.h
index 10bcb80..ded5ae5 100644
--- a/nptl/sysdeps/pthread/pthread.h
+++ b/nptl/sysdeps/pthread/pthread.h
@@ -404,6 +404,14 @@ extern int pthread_attr_getaffinity_np (const pthread_attr_t *__attr,
 					cpu_set_t *__cpuset)
      __THROW __nonnull ((1, 3));
 
+/* Get the default attributes used by pthread_create in this process.  */
+extern int pthread_getattr_default_np (pthread_attr_t *__attr)
+     __THROW __nonnull ((1));
+
+/* Set the default attributes to be used by pthread_create in this
+   process.  */
+extern int pthread_setattr_default_np (const pthread_attr_t *__attr)
+     __THROW __nonnull ((1));
 
 /* Initialize thread attribute *ATTR with attributes corresponding to the
    already running thread TH.  It shall be called on uninitialized ATTR
diff --git a/nptl/tst-default-attr.c b/nptl/tst-default-attr.c
new file mode 100644
index 0000000..32a48ec
--- /dev/null
+++ b/nptl/tst-default-attr.c
@@ -0,0 +1,377 @@
+/* Verify that pthread_[gs]etattr_default_np work correctly.
+
+   Copyright (C) 2013 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
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdbool.h>
+
+#define RETURN_IF_FAIL(f, ...) \
+  ({									      \
+    int ret = f (__VA_ARGS__);						      \
+    if (ret != 0)							      \
+      {									      \
+	printf ("%s returned %d (errno = %d)\n", #f, ret, errno);	      \
+	return ret;							      \
+      }									      \
+  })
+
+static int (*verify_result) (pthread_attr_t *);
+static size_t stacksize = 1024 * 1024;
+static size_t guardsize;
+static bool do_join = true;
+static int running = 0;
+static int detach_failed = 0;
+static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t c = PTHREAD_COND_INITIALIZER;
+
+static void *
+thr (void *unused)
+{
+  pthread_attr_t attr;
+  int ret;
+
+  /* To verify that the pthread_setattr_default_np worked.  */
+  if ((ret = pthread_getattr_default_np (&attr)) != 0)
+    {
+      printf ("pthread_getattr_default_np failed: %s\n", strerror (ret));
+      goto out;
+    }
+
+  if ((ret = verify_result (&attr)) != 0)
+    goto out;
+
+  /* To verify that the attributes actually got applied.  */
+  if ((ret = pthread_getattr_np (pthread_self (), &attr)) != 0)
+    {
+      printf ("pthread_getattr_np failed: %s\n", strerror (ret));
+      goto out;
+    }
+
+  ret = verify_result (&attr);
+
+out:
+  if (!do_join)
+    {
+      pthread_mutex_lock (&m);
+      running--;
+      pthread_cond_signal (&c);
+      pthread_mutex_unlock (&m);
+
+      detach_failed |= ret;
+    }
+
+  return (void *) (uintptr_t) ret;
+}
+
+static int
+run_threads (pthread_attr_t *attr)
+{
+  pthread_t t;
+  void *tret = NULL;
+
+  RETURN_IF_FAIL (pthread_setattr_default_np, attr);
+
+  /* Run twice to ensure that the attributes do not get overwritten in the
+     first run somehow.  */
+  for (int i = 0; i < 2; i++)
+    {
+      RETURN_IF_FAIL (pthread_create, &t, NULL, thr, NULL);
+      if (do_join)
+        RETURN_IF_FAIL (pthread_join, t, &tret);
+      else
+        {
+	  pthread_mutex_lock (&m);
+          running++;
+	  pthread_mutex_unlock (&m);
+	}
+
+      if (tret != NULL)
+	{
+	  puts ("Thread failed\n");
+	  return 1;
+	}
+    }
+
+  /* Stay in sync for detached threads and get their status.  */
+  while (!do_join)
+    {
+      pthread_mutex_lock (&m);
+      if (running == 0)
+        {
+	  pthread_mutex_unlock (&m);
+	  break;
+	}
+      pthread_cond_wait (&c, &m);
+      pthread_mutex_unlock (&m);
+    }
+
+  return 0;
+}
+
+static int
+verify_detach_result (pthread_attr_t *attr)
+{
+  int state;
+
+  RETURN_IF_FAIL (pthread_attr_getdetachstate, attr, &state);
+
+  if (state != PTHREAD_CREATE_DETACHED)
+    {
+      printf ("pthread_attr_set_default failed to set detach state\n");
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_detach_test (void)
+{
+  pthread_attr_t attr;
+
+  do_join = false;
+  RETURN_IF_FAIL (pthread_attr_init, &attr);
+  RETURN_IF_FAIL (pthread_attr_setdetachstate, &attr, PTHREAD_CREATE_DETACHED);
+
+  RETURN_IF_FAIL (run_threads, &attr);
+  return detach_failed;
+}
+
+static int
+verify_affinity_result (pthread_attr_t *attr)
+{
+  cpu_set_t cpuset;
+
+  RETURN_IF_FAIL (pthread_attr_getaffinity_np, attr, sizeof (cpuset), &cpuset);
+  if (!CPU_ISSET (0, &cpuset))
+    {
+      printf ("pthread_attr_set_default failed to set cpu affinity\n");
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_affinity_test (void)
+{
+  pthread_attr_t attr;
+
+  RETURN_IF_FAIL (pthread_attr_init, &attr);
+
+  /* Processor affinity.  Like scheduling policy, this could fail if the user
+     does not have the necessary privileges.  So we only spew a warning if
+     pthread_create fails with EPERM.  A computer has at least one CPU.  */
+  cpu_set_t cpuset;
+  CPU_ZERO (&cpuset);
+  CPU_SET (0, &cpuset);
+  RETURN_IF_FAIL (pthread_attr_setaffinity_np, &attr, sizeof (cpuset), &cpuset);
+
+  int ret = run_threads (&attr);
+
+  if (ret == EPERM)
+    {
+      fprintf (stderr, "Skipping CPU Affinity test: %s\n", strerror (ret));
+      return 0;
+    }
+  else if (ret != 0)
+    return ret;
+
+  return 0;
+}
+
+static int
+verify_sched_result (pthread_attr_t *attr)
+{
+  int inherited, policy;
+  struct sched_param param;
+
+  RETURN_IF_FAIL (pthread_attr_getinheritsched, attr, &inherited);
+  if (inherited != PTHREAD_EXPLICIT_SCHED)
+    {
+      printf ("pthread_attr_set_default failed to set EXPLICIT_SCHED\n");
+      return 1;
+    }
+
+  RETURN_IF_FAIL (pthread_attr_getschedpolicy, attr, &policy);
+  if (policy != SCHED_RR)
+    {
+      printf ("pthread_attr_set_default failed to set SCHED_RR\n");
+      return 1;
+    }
+
+  RETURN_IF_FAIL (pthread_attr_getschedparam, attr, &param);
+  if (param.sched_priority != 42)
+    {
+      printf ("pthread_attr_set_default failed to set sched_priority\n");
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_sched_test (void)
+{
+  pthread_attr_t attr;
+
+  RETURN_IF_FAIL (pthread_attr_init, &attr);
+
+  /* Scheduling policy.  Note that we don't always test these since it's
+     possible that the user the tests run as don't have the appropriate
+     privileges.  */
+  RETURN_IF_FAIL (pthread_attr_setinheritsched, &attr, PTHREAD_EXPLICIT_SCHED);
+  RETURN_IF_FAIL (pthread_attr_setschedpolicy, &attr, SCHED_RR);
+
+  struct sched_param param;
+  param.sched_priority = 42;
+  RETURN_IF_FAIL (pthread_attr_setschedparam, &attr, &param);
+
+  int ret = run_threads (&attr);
+
+  if (ret == EPERM)
+    {
+      fprintf (stderr, "Skipping Scheduler Attributes test: %s\n",
+	       strerror (ret));
+      return 0;
+    }
+  else if (ret != 0)
+    return ret;
+
+  return 0;
+}
+
+static int
+verify_guardsize_result (pthread_attr_t *attr)
+{
+  size_t guard;
+
+  RETURN_IF_FAIL (pthread_attr_getguardsize, attr, &guard);
+
+  if (guardsize != guard)
+    {
+      printf ("pthread_attr_set_default failed for guardsize (%zu, %zu)\n",
+	      guardsize, guard);
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_guardsize_test (void)
+{
+  long pagesize = sysconf (_SC_PAGESIZE);
+  pthread_attr_t attr;
+
+  if (pagesize < 0)
+    {
+      printf ("sysconf failed: %s\n", strerror (errno));
+      return 1;
+    }
+
+  RETURN_IF_FAIL (pthread_getattr_default_np, &attr);
+
+  /* Increase default guardsize by a page.  */
+  RETURN_IF_FAIL (pthread_attr_getguardsize, &attr, &guardsize);
+  guardsize += pagesize;
+  RETURN_IF_FAIL (pthread_attr_setguardsize, &attr, guardsize);
+  RETURN_IF_FAIL (run_threads, &attr);
+
+  return 0;
+}
+
+static int
+verify_stacksize_result (pthread_attr_t *attr)
+{
+  size_t stack;
+
+  RETURN_IF_FAIL (pthread_attr_getstacksize, attr, &stack);
+
+  if (stacksize != stack)
+    {
+      printf ("pthread_attr_set_default failed for stacksize (%zu, %zu)\n",
+	      stacksize, stack);
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_stacksize_test (void)
+{
+  long pagesize = sysconf (_SC_PAGESIZE);
+  pthread_attr_t attr;
+
+  if (pagesize < 0)
+    {
+      printf ("sysconf failed: %s\n", strerror (errno));
+      return 1;
+    }
+
+  /* Perturb the size by a page so that we're not aligned on the 64K boundary.
+     pthread_create does this perturbation on x86 to avoid causing the 64k
+     aliasing conflict.  We want to prevent pthread_create from doing that
+     since it is not consistent for all architectures.  */
+  stacksize += pagesize;
+
+  RETURN_IF_FAIL (pthread_attr_init, &attr);
+
+  /* Run twice to ensure that we don't give a false positive.  */
+  RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize);
+  RETURN_IF_FAIL (run_threads, &attr);
+  stacksize *= 2;
+  RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize);
+  RETURN_IF_FAIL (run_threads, &attr);
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  puts ("stacksize test");
+  verify_result = verify_stacksize_result;
+  RETURN_IF_FAIL (do_stacksize_test);
+
+  puts ("guardsize test");
+  verify_result = verify_guardsize_result;
+  RETURN_IF_FAIL (do_guardsize_test);
+
+  puts ("sched test");
+  verify_result = verify_sched_result;
+  RETURN_IF_FAIL (do_sched_test);
+
+  puts ("affinity test");
+  verify_result = verify_affinity_result;
+  RETURN_IF_FAIL (do_affinity_test);
+
+  puts ("detach test");
+  verify_result = verify_detach_result;
+  RETURN_IF_FAIL (do_detach_test);
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/nptl/vars.c b/nptl/vars.c
index 45ca486..3e2db42 100644
--- a/nptl/vars.c
+++ b/nptl/vars.c
@@ -24,6 +24,9 @@
    provide any.  */
 struct pthread_attr __default_pthread_attr attribute_hidden;
 
+/* Mutex protecting __default_pthread_attr.  */
+int __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
+
 /* Flag whether the machine is SMP or not.  */
 int __is_smp attribute_hidden;
 
diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist
index 696158a..5520312 100644
--- a/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist
@@ -222,3 +222,7 @@ GLIBC_2.17
  wait F
  waitpid F
  write F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
diff --git a/ports/sysdeps/unix/sysv/linux/alpha/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/alpha/nptl/libpthread.abilist
index 9626730..4c75b17 100644
--- a/ports/sysdeps/unix/sysv/linux/alpha/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/alpha/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/ports/sysdeps/unix/sysv/linux/arm/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/arm/nptl/libpthread.abilist
index de8095a..ac46302 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/arm/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.4
  GLIBC_2.4 A
  _IO_flockfile F
diff --git a/ports/sysdeps/unix/sysv/linux/ia64/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/ia64/nptl/libpthread.abilist
index b7749e2..a84c113 100644
--- a/ports/sysdeps/unix/sysv/linux/ia64/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/ia64/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  _IO_flockfile F
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libpthread.abilist
index de8095a..ac46302 100644
--- a/ports/sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/m68k/coldfire/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.4
  GLIBC_2.4 A
  _IO_flockfile F
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libpthread.abilist
index 827114f..865364e 100644
--- a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/ports/sysdeps/unix/sysv/linux/mips/mips32/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/mips/mips32/nptl/libpthread.abilist
index c3ba9d4..00ad3ab 100644
--- a/ports/sysdeps/unix/sysv/linux/mips/mips32/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/mips/mips32/nptl/libpthread.abilist
@@ -130,6 +130,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __libc_allocate_rtsig F
diff --git a/ports/sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libpthread.abilist
index 4e0b07f..fdcd0cc 100644
--- a/ports/sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/mips/mips64/n32/nptl/libpthread.abilist
@@ -130,6 +130,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __libc_allocate_rtsig F
diff --git a/ports/sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libpthread.abilist
index 4e0b07f..fdcd0cc 100644
--- a/ports/sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/mips/mips64/n64/nptl/libpthread.abilist
@@ -130,6 +130,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __libc_allocate_rtsig F
diff --git a/ports/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libpthread.abilist
index 7719099..c8a2a04 100644
--- a/ports/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/nptl/libpthread.abilist
index 658c4bf..f3c2600 100644
--- a/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/nptl/libpthread.abilist
@@ -222,3 +222,7 @@ GLIBC_2.12
  wait F
  waitpid F
  write F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
diff --git a/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/nptl/libpthread.abilist
index 658c4bf..f3c2600 100644
--- a/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/nptl/libpthread.abilist
@@ -222,3 +222,7 @@ GLIBC_2.12
  wait F
  waitpid F
  write F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
diff --git a/ports/sysdeps/unix/sysv/linux/tile/tilepro/nptl/libpthread.abilist b/ports/sysdeps/unix/sysv/linux/tile/tilepro/nptl/libpthread.abilist
index 658c4bf..f3c2600 100644
--- a/ports/sysdeps/unix/sysv/linux/tile/tilepro/nptl/libpthread.abilist
+++ b/ports/sysdeps/unix/sysv/linux/tile/tilepro/nptl/libpthread.abilist
@@ -222,3 +222,7 @@ GLIBC_2.12
  wait F
  waitpid F
  write F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
diff --git a/sysdeps/unix/sysv/linux/i386/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/i386/nptl/libpthread.abilist
index 827114f..865364e 100644
--- a/sysdeps/unix/sysv/linux/i386/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/i386/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libpthread.abilist
index 7719099..c8a2a04 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libpthread.abilist
index 7930c75..0faa1b8 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.3
  GLIBC_2.3 A
  _IO_flockfile F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/nptl/libpthread.abilist
index 827114f..865364e 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/nptl/libpthread.abilist
index 596fdd3..6613c09 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  _IO_flockfile F
diff --git a/sysdeps/unix/sysv/linux/sh/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/sh/nptl/libpthread.abilist
index 596fdd3..6613c09 100644
--- a/sysdeps/unix/sysv/linux/sh/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sh/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  _IO_flockfile F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libpthread.abilist
index 9626730..4c75b17 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/nptl/libpthread.abilist
@@ -174,6 +174,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  __open64 F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libpthread.abilist
index b7749e2..a84c113 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2
  GLIBC_2.2 A
  _IO_flockfile F
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/x86_64/64/nptl/libpthread.abilist
index 7c33f35..1b5192b 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/nptl/libpthread.abilist
@@ -8,6 +8,10 @@ GLIBC_2.12
  pthread_mutexattr_getrobust F
  pthread_mutexattr_setrobust F
  pthread_setname_np F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F
 GLIBC_2.2.5
  GLIBC_2.2.5 A
  _IO_flockfile F
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/nptl/libpthread.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/nptl/libpthread.abilist
index b07d16f..328f69a 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/nptl/libpthread.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/nptl/libpthread.abilist
@@ -222,3 +222,7 @@ GLIBC_2.16
  wait F
  waitpid F
  write F
+GLIBC_2.18
+ GLIBC_2.18 A
+ pthread_getattr_default_np F
+ pthread_setattr_default_np F


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