Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 385 insertions, 0 deletions

diff --git a/REORG.TODO/nptl/tst-default-attr.c b/REORG.TODO/nptl/tst-default-attr.c
new file mode 100644
index 0000000000..eff703ca23
--- /dev/null
+++ b/REORG.TODO/nptl/tst-default-attr.c
@@ -0,0 +1,385 @@
+/* Verify that pthread_[gs]etattr_default_np work correctly.
+
+   Copyright (C) 2013-2017 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:%d: %s returned %d (errno = %d)\n", __FILE__, __LINE__,   \
+		#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 __attribute__ ((unused)))
+{
+  pthread_attr_t attr;
+  int ret;
+
+  memset (&attr, 0xab, sizeof attr);
+  /* 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;
+
+  memset (&attr, 0xab, sizeof attr);
+  /* To verify that the attributes actually got applied.  */
+  if ((ret = pthread_getattr_np (pthread_self (), &attr)) != 0)
+    {
+      printf ("pthread_getattr_default_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 (const 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");
+	  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)
+    {
+      puts ("failed to set detach state");
+      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))
+    {
+      puts ("failed to set cpu affinity");
+      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)
+    {
+      printf ("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)
+    {
+      puts ("failed to set EXPLICIT_SCHED (%d != %d)");
+      return 1;
+    }
+
+  RETURN_IF_FAIL (pthread_attr_getschedpolicy, attr, &policy);
+  if (policy != SCHED_RR)
+    {
+      printf ("failed to set SCHED_RR (%d != %d)\n", policy, SCHED_RR);
+      return 1;
+    }
+
+  RETURN_IF_FAIL (pthread_attr_getschedparam, attr, &param);
+  if (param.sched_priority != 42)
+    {
+      printf ("failed to set sched_priority (%d != %d)\n",
+	      param.sched_priority, 42);
+      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)
+    {
+      printf ("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 ("failed to set guardsize (%zu, %zu)\n", guardsize, guard);
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_guardsize_test (void)
+{
+  long int 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 ("failed to set default stacksize (%zu, %zu)\n", stacksize, stack);
+      return 1;
+    }
+
+  return 0;
+}
+
+static int
+do_stacksize_test (void)
+{
+  long int 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;
+}
+
+/* We test each attribute separately because sched and affinity tests may need
+   additional user privileges that may not be available during the test run.
+   Each attribute test is a set of two functions, viz. a function to set the
+   default attribute (do_foo_test) and another to verify its result
+   (verify_foo_result).  Each test spawns a thread and checks (1) if the
+   attribute values were applied correctly and (2) if the change in the default
+   value reflected.  */
+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"