Xmethod support in Python.
* python/py-xmethods.c: New file. * python/py-objfile.c (objfile_object): New field 'xmethods'. (objfpy_dealloc): XDECREF on the new xmethods field. (objfpy_new, objfile_to_objfile_object): Initialize xmethods field. (objfpy_get_xmethods): New function. (objfile_getset): New entry 'xmethods'. * python/py-progspace.c (pspace_object): New field 'xmethods'. (pspy_dealloc): XDECREF on the new xmethods field. (pspy_new, pspace_to_pspace_object): Initialize xmethods field. (pspy_get_xmethods): New function. (pspace_getset): New entry 'xmethods'. * python/python-internal.h: Add declarations for new functions. * python/python.c (_initialize_python): Invoke gdbpy_initialize_xmethods. * python/lib/gdb/__init__.py (xmethods): New attribute. * python/lib/gdb/xmethod.py: New file. * python/lib/gdb/command/xmethods.py: New file. testuite/ * gdb.python/py-xmethods.cc: New testcase to test xmethods. * gdb.python/py-xmethods.exp: New tests to test xmethods. * gdb.python/py-xmethods.py: Python script supporting the new testcase and tests.
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Siva Chandra
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15 changed files with 1821 additions and 2 deletions
218
gdb/testsuite/gdb.python/py-xmethods.py
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gdb/testsuite/gdb.python/py-xmethods.py
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# Copyright 2014 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is part of the GDB testsuite. It test the xmethods support
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# in the Python extension language.
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import gdb
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import re
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from gdb.xmethod import XMethod
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from gdb.xmethod import XMethodMatcher, XMethodWorker
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from gdb.xmethod import SimpleXMethodMatcher
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def A_plus_A(obj, opr):
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print ('From Python <A_plus_A>:')
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return obj['a'] + opr['a']
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def plus_plus_A(obj):
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print ('From Python <plus_plus_A>:')
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return obj['a'] + 1
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def A_geta(obj):
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print ('From Python <A_geta>:')
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return obj['a']
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def A_getarrayind(obj, index):
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print 'From Python <A_getarrayind>:'
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return obj['array'][index]
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type_A = gdb.parse_and_eval('(dop::A *) 0').type.target()
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type_B = gdb.parse_and_eval('(dop::B *) 0').type.target()
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type_int = gdb.parse_and_eval('(int *) 0').type.target()
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# The E class matcher and worker test two things:
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# 1. xmethod returning None.
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# 2. Matcher returning a list of workers.
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class E_method_char_worker(XMethodWorker):
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def __init__(self):
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pass
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def get_arg_types(self):
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return gdb.lookup_type('char')
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def __call__(self, obj, arg):
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print 'From Python <E_method_char>'
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return None
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class E_method_int_worker(XMethodWorker):
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def __init__(self):
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pass
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def get_arg_types(self):
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return gdb.lookup_type('int')
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def __call__(self, obj, arg):
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print 'From Python <E_method_int>'
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return None
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class E_method_matcher(XMethodMatcher):
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def __init__(self):
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XMethodMatcher.__init__(self, 'E_methods')
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self.methods = [XMethod('method_int'), XMethod('method_char')]
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def match(self, class_type, method_name):
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class_tag = class_type.unqualified().tag
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if not re.match('^dop::E$', class_tag):
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return None
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if not re.match('^method$', method_name):
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return None
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workers = []
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if self.methods[0].enabled:
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workers.append(E_method_int_worker())
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if self.methods[1].enabled:
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workers.append(E_method_char_worker())
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return workers
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# The G class method matcher and worker illustrate how to write
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# xmethod matchers and workers for template classes and template
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# methods.
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class G_size_diff_worker(XMethodWorker):
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def __init__(self, class_template_type, method_template_type):
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self._class_template_type = class_template_type
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self._method_template_type = method_template_type
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def get_arg_types(self):
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pass
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def __call__(self, obj):
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print ('From Python G<>::size_diff()')
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return (self._method_template_type.sizeof -
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self._class_template_type.sizeof)
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class G_size_mul_worker(XMethodWorker):
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def __init__(self, class_template_type, method_template_val):
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self._class_template_type = class_template_type
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self._method_template_val = method_template_val
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def get_arg_types(self):
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pass
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def __call__(self, obj):
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print ('From Python G<>::size_mul()')
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return self._class_template_type.sizeof * self._method_template_val
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class G_mul_worker(XMethodWorker):
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def __init__(self, class_template_type, method_template_type):
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self._class_template_type = class_template_type
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self._method_template_type = method_template_type
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def get_arg_types(self):
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return self._method_template_type
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def __call__(self, obj, arg):
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print ('From Python G<>::mul()')
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return obj['t'] * arg
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class G_methods_matcher(XMethodMatcher):
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def __init__(self):
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XMethodMatcher.__init__(self, 'G_methods')
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self.methods = [XMethod('size_diff'),
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XMethod('size_mul'),
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XMethod('mul')]
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def _is_enabled(self, name):
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for method in self.methods:
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if method.name == name and method.enabled:
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return True
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def match(self, class_type, method_name):
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class_tag = class_type.unqualified().tag
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if not re.match('^dop::G<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$',
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class_tag):
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return None
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t_name = class_tag[7:-1]
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try:
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t_type = gdb.lookup_type(t_name)
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except gdb.error:
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return None
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if re.match('^size_diff<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$', method_name):
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if not self._is_enabled('size_diff'):
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return None
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t1_name = method_name[10:-1]
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try:
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t1_type = gdb.lookup_type(t1_name)
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return G_size_diff_worker(t_type, t1_type)
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except gdb.error:
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return None
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if re.match('^size_mul<[ ]*[0-9]+[ ]*>$', method_name):
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if not self._is_enabled('size_mul'):
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return None
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m_val = int(method_name[9:-1])
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return G_size_mul_worker(t_type, m_val)
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if re.match('^mul<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$', method_name):
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if not self._is_enabled('mul'):
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return None
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t1_name = method_name[4:-1]
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try:
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t1_type = gdb.lookup_type(t1_name)
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return G_mul_worker(t_type, t1_type)
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except gdb.error:
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return None
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global_dm_list = [
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SimpleXMethodMatcher('A_plus_A',
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'^dop::A$',
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'operator\+',
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A_plus_A,
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# This is a replacement, hence match the arg type
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# exactly!
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type_A.const().reference()),
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SimpleXMethodMatcher('plus_plus_A',
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'^dop::A$',
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'operator\+\+',
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plus_plus_A),
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SimpleXMethodMatcher('A_geta',
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'^dop::A$',
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'^geta$',
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A_geta),
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SimpleXMethodMatcher('A_getarrayind',
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'^dop::A$',
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'^getarrayind$',
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A_getarrayind,
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type_int),
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]
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for matcher in global_dm_list:
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gdb.xmethod.register_xmethod_matcher(gdb, matcher)
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gdb.xmethod.register_xmethod_matcher(gdb.current_progspace(),
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G_methods_matcher())
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gdb.xmethod.register_xmethod_matcher(gdb.current_progspace(),
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E_method_matcher())
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