d11916aa89
gdb/ChangeLog: * Makefile.in (SUBDIR_PYTHON_OBJS): Add py-unwind.o. (SUBDIR_PYTHON_SRCS): Add py-unwind.c. (py-unwind.o): New recipe. * NEWS: mention Python frame unwinding. * data-directory/Makefile.in (PYTHON_FILE_LIST): Add gdb/unwinder.py and gdb/command/unwinder.py * python/lib/gdb/__init__.py (packages): Add frame_unwinders list. (execute_unwinders): New function. * python/lib/gdb/command/unwinders.py: New file. * python/lib/gdb/unwinder.py: New file. * python/py-objfile.c (objfile_object): Add frame_unwinders field. (objfpy_dealloc): Decrement frame_unwinders reference count. (objfpy_initialize): Create frame_unwinders list. (objfpy_get_frame_unwinders): New function. (objfpy_set_frame_unwinders): Ditto. (objfile_getset): Add frame_unwinders attribute to Objfile. * python/py-progspace.c (pspace_object): Add frame_unwinders field. (pspy_dealloc): Decrement frame_unwinders reference count. (pspy_initialize): Create frame_unwinders list. (pspy_get_frame_unwinders): New function. (pspy_set_frame_unwinders): Ditto. (pspy_getset): Add frame_unwinders attribute to gdb.Progspace. * python/py-unwind.c: New file. * python/python-internal.h (pspy_get_name_unwinders): New prototype. (objpy_get_frame_unwinders): New prototype. (gdbpy_initialize_unwind): New prototype. * python/python.c (gdbpy_apply_type_printers): Call gdbpy_initialize_unwind. gdb/doc/ChangeLog: * doc/python.texi (Writing a Frame Unwinder in Python): Add section. gdb/testsuite/ChangeLog: * gdb.python/py-unwind-maint.c: New file. * gdb.python/py-unwind-maint.exp: New test. * gdb.python/py-unwind-maint.py: New file. * gdb.python/py-unwind.c: New file. * gdb.python/py-unwind.exp: New test. * gdb.python/py-unwind.py: New test.
94 lines
3 KiB
Python
94 lines
3 KiB
Python
# Copyright (C) 2015 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/>.
|
|
|
|
"""Unwinder class and register_unwinder function."""
|
|
|
|
import gdb
|
|
|
|
|
|
class Unwinder(object):
|
|
"""Base class (or a template) for frame unwinders written in Python.
|
|
|
|
An unwinder has a single method __call__ and the attributes
|
|
described below.
|
|
|
|
Attributes:
|
|
name: The name of the unwinder.
|
|
enabled: A boolean indicating whether the unwinder is enabled.
|
|
"""
|
|
|
|
def __init__(self, name):
|
|
"""Constructor.
|
|
|
|
Args:
|
|
name: An identifying name for the unwinder.
|
|
"""
|
|
self.name = name
|
|
self.enabled = True
|
|
|
|
def __call__(self, pending_frame):
|
|
"""GDB calls this method to unwind a frame.
|
|
|
|
Arguments:
|
|
pending_frame: gdb.PendingFrame instance.
|
|
|
|
Returns:
|
|
gdb.UnwindInfo instance.
|
|
"""
|
|
raise NotImplementedError("Unwinder __call__.")
|
|
|
|
|
|
def register_unwinder(locus, unwinder, replace=False):
|
|
"""Register unwinder in given locus.
|
|
|
|
The unwinder is prepended to the locus's unwinders list. Unwinder
|
|
name should be unique.
|
|
|
|
Arguments:
|
|
locus: Either an objfile, progspace, or None (in which case
|
|
the unwinder is registered globally).
|
|
unwinder: An object of a gdb.Unwinder subclass
|
|
replace: If True, replaces existing unwinder with the same name.
|
|
Otherwise, raises exception if unwinder with the same
|
|
name already exists.
|
|
|
|
Returns:
|
|
Nothing.
|
|
|
|
Raises:
|
|
RuntimeError: Unwinder name is not unique
|
|
TypeError: Bad locus type
|
|
"""
|
|
if locus is None:
|
|
if gdb.parameter("verbose"):
|
|
gdb.write("Registering global %s unwinder ...\n" % unwinder.name)
|
|
locus = gdb
|
|
elif isinstance(locus, gdb.Objfile) or isinstance(locus, gdb.Progspace):
|
|
if gdb.parameter("verbose"):
|
|
gdb.write("Registering %s unwinder for %s ...\n" %
|
|
(unwinder.name, locus.filename))
|
|
else:
|
|
raise TypeError("locus should be gdb.Objfile or gdb.Progspace or None")
|
|
|
|
i = 0
|
|
for needle in locus.frame_unwinders:
|
|
if needle.name == unwinder.name:
|
|
if replace:
|
|
del locus.frame_unwinders[i]
|
|
else:
|
|
raise RuntimeError("Unwinder %s already exists." %
|
|
unwinder.name)
|
|
i += 1
|
|
locus.frame_unwinders.insert(0, unwinder)
|