GNU C Library master sources branch master updated. glibc-2.26-372-ga856d4d

[ppluzhnikov at sourceware dot org]

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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a856d4d4a8a56eaefdddb58884bfa2bfe922ee4c

commit a856d4d4a8a56eaefdddb58884bfa2bfe922ee4c
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date:   Wed Sep 20 09:51:02 2017 -0700

    Oops. stdlib/test-atexit-race-common.c should have been part of 26e70aec7028feeb196744eb97cd2dff3670b7aa

diff --git a/stdlib/test-atexit-race-common.c b/stdlib/test-atexit-race-common.c
new file mode 100644
index 0000000..b379283
--- /dev/null
+++ b/stdlib/test-atexit-race-common.c
@@ -0,0 +1,69 @@
+/* Bug 14333: Support file for atexit/exit, etc. race tests.
+   Copyright (C) 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/>.  */
+
+/* This file must be run from within a directory called "stdlib".  */
+
+/* The atexit/exit, at_quick_exit/quick_exit, __cxa_atexit/exit, etc.
+   exhibited data race while accessing destructor function list (Bug 14333).
+
+   This test spawns large number of threads, which all race to register
+   large number of destructors.
+
+   Before the fix, running this test resulted in a SIGSEGV.
+   After the fix, we expect clean process termination.  */
+
+#if !defined(CALL_EXIT) || !defined(CALL_ATEXIT)
+#error Must define CALL_EXIT and CALL_ATEXIT before using this file.
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <support/xthread.h>
+
+const size_t kNumThreads = 1024;
+const size_t kNumHandlers = 1024;
+
+static void *
+threadfunc (void *unused)
+{
+  size_t i;
+  for (i = 0; i < kNumHandlers; ++i) {
+    CALL_ATEXIT;
+  }
+  return NULL;
+}
+
+static int
+do_test (void)
+{
+  size_t i;
+  pthread_attr_t attr;
+
+  xpthread_attr_init (&attr);
+  xpthread_attr_setdetachstate (&attr, 1);
+
+  for (i = 0; i < kNumThreads; ++i) {
+    xpthread_create (&attr, threadfunc, NULL);
+  }
+  xpthread_attr_destroy (&attr);
+
+  CALL_EXIT;
+}
+
+#define TEST_FUNCTION do_test
+#include <support/test-driver.c>

-----------------------------------------------------------------------

Summary of changes:
 stdlib/test-atexit-race-common.c |   69 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 69 insertions(+), 0 deletions(-)
 create mode 100644 stdlib/test-atexit-race-common.c


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