GDB 7.6.50

gdb/testsuite/gdb.threads/create-fail.c

Index: gdb/testsuite/gdb.threads/create-fail.c
diff --git a/gdb/testsuite/gdb.threads/create-fail.c b/gdb/testsuite/gdb.threads/create-fail.c
new file mode 100644
index 0000000000000000000000000000000000000000..e8bce0afdae612d76443422de71eff9a7a465f57
--- /dev/null
+++ b/gdb/testsuite/gdb.threads/create-fail.c
@@ -0,0 +1,119 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2012-2013 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#define _GNU_SOURCE
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <assert.h>
+
+/* Count the number of tasks/threads in the PID thread group.  */
+
+static int
+count_tasks (pid_t pid)
+{
+  char path[100];
+  int count;
+  DIR *d;
+
+  snprintf (path, sizeof (path), "/proc/%d/task/", (int) pid);
+  d = opendir (path);
+  if (d == NULL)
+    return -1;
+
+  for (count = 0; readdir (d) != NULL; count++)
+    ;
+  closedir (d);
+
+  /* Account for '.' and '..'.  */
+  assert (count > 2);
+  return count - 2;
+}
+
+pthread_attr_t attr[CPU_SETSIZE];
+pthread_t thr[CPU_SETSIZE];
+
+static void *
+mythread (void *_arg)
+{
+  return NULL;
+}
+
+int
+main ()
+{
+  int i;
+
+  for (i = 0; i < CPU_SETSIZE; i++)
+    {
+      cpu_set_t set;
+      int ret;
+
+      pthread_attr_init (&attr[i]);
+      CPU_ZERO_S (sizeof (set), &set);
+      CPU_SET_S (i, sizeof (set), &set);
+
+      ret = pthread_attr_setaffinity_np (&attr[i], sizeof (set), &set);
+      if (ret != 0)
+	{
+	  fprintf (stderr, "set_affinity: %d: %s\n", ret, strerror (ret));
+	  exit (3);
+	}
+      ret = pthread_create (&thr[i], &attr[i], mythread, NULL);
+      /* Should fail with EINVAL at some point.  */
+      if (ret != 0)
+	{
+	  unsigned long t;
+
+	  fprintf (stderr, "pthread_create: %d: %s\n", ret, strerror (ret));
+
+	  /* Wait for all threads to exit.  pthread_create spawns a
+	     clone thread even in the failing case, as it can only try
+	     to set the affinity after creating the thread.  That new
+	     thread is immediately canceled (because setting the
+	     affinity fails), by killing it with a SIGCANCEL signal,
+	     which may end up in pthread_cancel/unwind paths, which
+	     may trigger a libgcc_s.so load, making the thread hit the
+	     solib-event breakpoint.  Now, if we would let the program
+	     exit without waiting, sometimes it would happen that the
+	     inferior exits just while we're handling the solib-event,
+	     resulting in errors being thrown due to failing ptrace
+	     call fails (with ESCHR), breaking the test.  */
+	  t = 16;
+	  while (count_tasks (getpid ()) > 1)
+	    {
+	      usleep (t);
+
+	      if (t < 256)
+		t *= 2;
+	    }
+
+	  /* Normal exit, because this is what we are expecting.  */
+	  exit (0);
+	}
+    }
+
+  /* Should not normally be reached.  */
+  exit (1);
+}