From f4952523968703caa027a5922263eb97b88bedc3 Mon Sep 17 00:00:00 2001
From: Pierre-Marie de Rodat <derodat@adacore.com>
Date: Mon, 27 Jun 2016 12:11:25 +0200
Subject: Fix use of a dangling pointer for Python breakpoint objects
When a Python script tries to create a breakpoint but fails to do so,
gdb.Breakpoint.__init__ raises an exception and the breakpoint does not
exist anymore in the Python interpreter. However, GDB still keeps a
reference to the Python object to be used for a later hook, which is
wrong.
This commit adds the necessary cleanup code so that there is no stale
reference to this Python object. It also adds a new testcase to
reproduce the bug and check the fix.
2016-06-25 Pierre-Marie de Rodat <derodat@adacore.com>
gdb/
* python/py-breakpoint.c (bppy_init): Clear bppy_pending_object
when there is an error during the breakpoint creation.
gdb/testsuite
* gdb.python/py-breakpoint-create-fail.c,
gdb.python/py-breakpoint-create-fail.exp,
gdb.python/py-breakpoint-create-fail.py: New testcase.
---
.../gdb.python/py-breakpoint-create-fail.c | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 gdb/testsuite/gdb.python/py-breakpoint-create-fail.c
(limited to 'gdb/testsuite/gdb.python/py-breakpoint-create-fail.c')
diff --git a/gdb/testsuite/gdb.python/py-breakpoint-create-fail.c b/gdb/testsuite/gdb.python/py-breakpoint-create-fail.c
new file mode 100644
index 0000000..c346bdd
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-breakpoint-create-fail.c
@@ -0,0 +1,28 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 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/>. */
+
+int
+foo (int a)
+{
+ return a * 2;
+}
+
+int
+main (void)
+{
+ return foo (2);
+}
--
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