commit 4c9a21f6a57e0e2e382aac327f6edaa1475dd3f1
Author: Tom Tromey <tromey@redhat.com>
Date: Wed Jan 22 08:44:41 2014 -0700
fix erroneous error-handling in frame filter code
This fixes PR python/16487.
The bug here is that the function-name-handling code in py_print_frame
had a small logic error (really a misplaced closing brace). This
error could lead to a Py_DECREF(NULL), which crashes.
This patch fixes the bug in the obvious way.
Built and regtested on x86-64 Fedora 18. New test case included.
2014-01-23 Tom Tromey <tromey@redhat.com>
PR python/16487:
* python/py-framefilter.c (py_print_frame): Don't call Py_DECREF
on a NULL pointer. Move "goto error" to correct place.
2014-01-23 Tom Tromey <tromey@redhat.com>
PR python/16487:
* gdb.python/py-framefilter.exp: Add test using "Error" filter.
* gdb.python/py-framefilter.py (ErrorInName, ErrorFilter): New
classes.
### a/gdb/ChangeLog
### b/gdb/ChangeLog
## -1,5 +1,11 @@
2014-01-23 Tom Tromey <tromey@redhat.com>
+ PR python/16487:
+ * python/py-framefilter.c (py_print_frame): Don't call Py_DECREF
+ on a NULL pointer. Move "goto error" to correct place.
+
+2014-01-23 Tom Tromey <tromey@redhat.com>
+
PR python/16491:
* python/py-framefilter.c (apply_frame_filter): Call
ensure_python_env after computing gdbarch.
--- a/gdb/python/py-framefilter.c
+++ b/gdb/python/py-framefilter.c
@@ -1218,11 +1218,11 @@ py_print_frame (PyObject *filter, int flags, enum py_frame_args args_type,
gdbpy_convert_exception (except);
goto error;
}
+ Py_DECREF (py_func);
}
- Py_DECREF (py_func);
+ else
+ goto error;
}
- else
- goto error;
}
### a/gdb/testsuite/ChangeLog
### b/gdb/testsuite/ChangeLog
## -1,5 +1,12 @@
2014-01-23 Tom Tromey <tromey@redhat.com>
+ PR python/16487:
+ * gdb.python/py-framefilter.exp: Add test using "Error" filter.
+ * gdb.python/py-framefilter.py (ErrorInName, ErrorFilter): New
+ classes.
+
+2014-01-23 Tom Tromey <tromey@redhat.com>
+
PR python/16491:
* gdb.python/py-framefilter.py (Reverse_Function.function): Read a
string from an inferior frame.
--- a/gdb/testsuite/gdb.python/py-framefilter.exp
+++ b/gdb/testsuite/gdb.python/py-framefilter.exp
@@ -177,6 +177,17 @@ gdb_test "bt 1" \
"#0 end_func \\(foo=21, bar=\"Param\", fb=, bf=\{nothing = \"Foo Bar\", f = 42, s = 19\}\\) at .*py-framefilter.c.*" \
"bt 1 no addresss"
+gdb_test_no_output "set python print-stack message" \
+ "Set python print-stack to message for Error filter"
+gdb_test_no_output "enable frame-filter global Error" \
+ "enable frame-filter global Error"
+set test "bt 1 with Error filter"
+gdb_test_multiple "bt 1" $test {
+ -re "Python Exception .*whoops:.*$gdb_prompt $" {
+ pass $test
+ }
+}
+
remote_file host delete ${remote_python_file}
# Test with no debuginfo
--- a/gdb/testsuite/gdb.python/py-framefilter.py
+++ b/gdb/testsuite/gdb.python/py-framefilter.py
@@ -128,5 +128,25 @@ class FrameElider ():
def filter (self, frame_iter):
return ElidingIterator (frame_iter)
+# A simple decorator that gives an error when computing the function.
+class ErrorInName(FrameDecorator):
+ def __init__(self, frame):
+ FrameDecorator.__init__(self, frame)
+
+ def function(self):
+ raise RuntimeError('whoops')
+
+# A filter that supplies buggy frames. Disabled by default.
+class ErrorFilter():
+ def __init__ (self):
+ self.name = "Error"
+ self.priority = 1
+ self.enabled = False
+ gdb.frame_filters [self.name] = self
+
+ def filter(self, frame_iter):
+ return itertools.imap(ErrorInName, frame_iter)
+
FrameFilter()
FrameElider()
+ErrorFilter()