BZ#18383: Add test case for large alignment in TLS blocks.

1 files changed, 85 insertions, 0 deletions

diff --git a/elf/tst-tlsalign.c b/elf/tst-tlsalign.c
new file mode 100644
index 0000000000..da04f577e2
--- /dev/null
+++ b/elf/tst-tlsalign.c
@@ -0,0 +1,85 @@
+/* Test for large alignment in TLS blocks, BZ#18383.
+   Copyright (C) 2015 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static __thread int tdata1 = 1;
+static __thread int tdata2 __attribute__ ((aligned (0x10))) = 2;
+static __thread int tdata3 __attribute__ ((aligned (0x1000))) = 4;
+static __thread int tbss1;
+static __thread int tbss2 __attribute__ ((aligned (0x10)));
+static __thread int tbss3 __attribute__ ((aligned (0x1000)));
+
+#ifndef NO_LIB
+extern __thread int mod_tdata1;
+extern __thread int mod_tdata2;
+extern __thread int mod_tdata3;
+extern __thread int mod_tbss1;
+extern __thread int mod_tbss2;
+extern __thread int mod_tbss3;
+#endif
+
+static int
+test_one (const char *which, unsigned int alignment, int *var, int value)
+{
+  uintptr_t addr = (uintptr_t) var;
+  unsigned int misalign = addr & (alignment - 1);
+
+  printf ("%s TLS address %p %% %u = %u\n",
+          which, (void *) var, alignment, misalign);
+
+  int got = *var;
+  if (got != value)
+    {
+      printf ("%s value %d should be %d\n", which, got, value);
+      return 1;
+    }
+
+  return misalign != 0;
+}
+
+static int
+do_test (void)
+{
+  int fail = 0;
+
+  fail |= test_one ("tdata1", 4, &tdata1, 1);
+  fail |= test_one ("tdata2", 0x10, &tdata2, 2);
+  fail |= test_one ("tdata3", 0x1000, &tdata3, 4);
+
+  fail |= test_one ("tbss1", 4, &tbss1, 0);
+  fail |= test_one ("tbss2", 0x10, &tbss2, 0);
+  fail |= test_one ("tbss3", 0x1000, &tbss3, 0);
+
+#ifndef NO_LIB
+  fail |= test_one ("mod_tdata1", 4, &mod_tdata1, 1);
+  fail |= test_one ("mod_tdata2", 0x10, &mod_tdata2, 2);
+  fail |= test_one ("mod_tdata3", 0x1000, &mod_tdata3, 4);
+
+  fail |= test_one ("mod_tbss1", 4, &mod_tbss1, 0);
+  fail |= test_one ("mod_tbss2", 0x10, &mod_tbss2, 0);
+  fail |= test_one ("mod_tbss3", 0x1000, &mod_tbss3, 0);
+#endif
+
+  return fail ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"