1 files changed, 71 insertions, 0 deletions
diff --git a/stdlib/test-errno-printer.py b/stdlib/test-errno-printer.py
new file mode 100644
index 0000000000..b55ee08b08
--- /dev/null
+++ b/stdlib/test-errno-printer.py
@@ -0,0 +1,71 @@
+# Test for the errno pretty-printer.
+# 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/>.
+
+import sys
+
+from test_printers_common import *
+
+test_source = sys.argv[1]
+test_bin = sys.argv[2]
+printer_files = sys.argv[3:]
+printer_names = ['global glibc-errno']
+
+try:
+    init_test(test_bin, printer_files, printer_names)
+    go_to_main()
+
+    # All supported versions of gdb do run the pretty-printer on an
+    # _array_ of error_t.
+    test_printer('array_of_error_t',
+                 r'= \{0 \(Success\), \d+ \(ERANGE\), -2\}', is_ptr=False)
+
+    # Some versions of gdb don't run the pretty-printer on a _scalar_
+    # whose type is error_t.  If we have such a gdb, the test is
+    # unsupported.
+    test('print (error_t) 0',
+         pattern             = r'= 0 \(Success\)$',
+         unsupported_pattern = r'= 0$')
+
+    # Some versions of gdb don't support reading thread-specific variables;
+    # these versions may also have trouble reading errno.
+    test('print ensure_gdb_can_read_thread_variables',
+         pattern             = r'= 0$',
+         unsupported_pattern = r'Cannot find thread-local')
+
+    next_cmd()
+    next_cmd()
+    test_printer('errno', r'0 (Success)', is_ptr=False)
+    next_cmd()
+    test_printer('errno', r'\d+ (ERANGE)', is_ptr=False)
+
+    break_at(test_source, 'test errno 2', is_ptr=False)
+    continue_cmd()
+    next_cmd()
+    test_printer('errno', r'-2', is_ptr=False)
+
+    continue_cmd() # Exit
+
+except (NoLineError, pexpect.TIMEOUT) as exception:
+    print('Error: {0}'.format(exception))
+    result = FAIL
+
+else:
+    print('Test succeeded.')
+    result = PASS
+
+exit(result)