1 files changed, 56 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.python/py-breakpoint-create-fail.exp b/gdb/testsuite/gdb.python/py-breakpoint-create-fail.exp
new file mode 100644
index 0000000..354a91e
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-breakpoint-create-fail.exp
@@ -0,0 +1,56 @@
+# Copyright (C) 2016 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/>.
+
+# This file is part of the GDB testsuite.  It tests proper handling for
+# breakpoint creation failure.
+
+load_lib gdb-python.exp
+
+standard_testfile
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
+    return -1
+}
+
+# Skip all tests if Python scripting is not enabled.
+if { [skip_python_tests] } { continue }
+
+clean_restart "${testfile}"
+if ![runto_main] {
+    perror "could not run to main"
+    continue
+}
+
+# The following will create a breakpoint Python wrapper whose construction will
+# abort: the requested symbol is not defined.  GDB should not keep a reference
+# to the wrapper; however it used to...
+gdb_test "source py-breakpoint-create-fail.py"
+
+# ... and when it did, as a result, the following breakpoint creation (not
+# initiated by the Python API) would dereference the already-freed Python
+# breakpoint wrapper, resulting in undefined behavior, sometimes observed as a
+# gdb crash, and other times causing the next stop to invoke the Python wrapper
+# "stop" method for the object that is not supposed to exist.
+gdb_test "break foo"
+
+set test "continuing to foo"
+gdb_test_multiple "continue" "$test" {
+    -re "MyBP\.stop was invoked\!.*$gdb_prompt $" {
+        fail "$test"
+    }
+    -re "Continuing.*Breakpoint 2, foo.*$gdb_prompt $" {
+        pass "$test"
+    }
+}