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# Copyright 2014-2019 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 test the xmethods support
# in the Python extension language.
import gdb
import re
from gdb.xmethod import XMethod
from gdb.xmethod import XMethodMatcher, XMethodWorker
from gdb.xmethod import SimpleXMethodMatcher
def A_plus_A(obj, opr):
print('From Python <A_plus_A>:')
return obj['a'] + opr['a']
def plus_plus_A(obj):
print('From Python <plus_plus_A>:')
return obj['a'] + 1
def A_geta(obj):
print('From Python <A_geta>:')
return obj['a']
def A_getarrayind(obj, index):
print('From Python <A_getarrayind>:')
return obj['array'][index]
def A_indexoper(obj, index):
return obj['array'][index].reference_value()
def B_indexoper(obj, index):
return obj['array'][index].const_value().reference_value()
type_A = gdb.parse_and_eval('(dop::A *) 0').type.target()
type_B = gdb.parse_and_eval('(dop::B *) 0').type.target()
type_int = gdb.parse_and_eval('(int *) 0').type.target()
# The E class matcher and worker test two things:
# 1. xmethod returning None.
# 2. Matcher returning a list of workers.
class E_method_char_worker(XMethodWorker):
def __init__(self):
pass
def get_arg_types(self):
return gdb.lookup_type('char')
def get_result_type(self, obj, arg):
return gdb.lookup_type('void')
def __call__(self, obj, arg):
print('From Python <E_method_char>')
return None
class E_method_int_worker(XMethodWorker):
def __init__(self):
pass
def get_arg_types(self):
return gdb.lookup_type('int')
# Note: get_result_type method elided on purpose
def __call__(self, obj, arg):
print('From Python <E_method_int>')
return None
class E_method_matcher(XMethodMatcher):
def __init__(self):
XMethodMatcher.__init__(self, 'E_methods')
self.methods = [XMethod('method_int'), XMethod('method_char')]
def match(self, class_type, method_name):
class_tag = class_type.unqualified().tag
if not re.match('^dop::E$', class_tag):
return None
if not re.match('^method$', method_name):
return None
workers = []
if self.methods[0].enabled:
workers.append(E_method_int_worker())
if self.methods[1].enabled:
workers.append(E_method_char_worker())
return workers
# The G class method matcher and worker illustrate how to write
# xmethod matchers and workers for template classes and template
# methods.
class G_size_diff_worker(XMethodWorker):
def __init__(self, class_template_type, method_template_type):
self._class_template_type = class_template_type
self._method_template_type = method_template_type
def get_arg_types(self):
pass
def __call__(self, obj):
print('From Python G<>::size_diff()')
return (self._method_template_type.sizeof -
self._class_template_type.sizeof)
class G_size_mul_worker(XMethodWorker):
def __init__(self, class_template_type, method_template_val):
self._class_template_type = class_template_type
self._method_template_val = method_template_val
def get_arg_types(self):
pass
def __call__(self, obj):
print('From Python G<>::size_mul()')
return self._class_template_type.sizeof * self._method_template_val
class G_mul_worker(XMethodWorker):
def __init__(self, class_template_type, method_template_type):
self._class_template_type = class_template_type
self._method_template_type = method_template_type
def get_arg_types(self):
return self._method_template_type
def __call__(self, obj, arg):
print('From Python G<>::mul()')
return obj['t'] * arg
class G_methods_matcher(XMethodMatcher):
def __init__(self):
XMethodMatcher.__init__(self, 'G_methods')
self.methods = [XMethod('size_diff'),
XMethod('size_mul'),
XMethod('mul')]
def _is_enabled(self, name):
for method in self.methods:
if method.name == name and method.enabled:
return True
def match(self, class_type, method_name):
class_tag = class_type.unqualified().tag
if not re.match('^dop::G<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$',
class_tag):
return None
t_name = class_tag[7:-1]
try:
t_type = gdb.lookup_type(t_name)
except gdb.error:
return None
if re.match('^size_diff<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$', method_name):
if not self._is_enabled('size_diff'):
return None
t1_name = method_name[10:-1]
try:
t1_type = gdb.lookup_type(t1_name)
return G_size_diff_worker(t_type, t1_type)
except gdb.error:
return None
if re.match('^size_mul<[ ]*[0-9]+[ ]*>$', method_name):
if not self._is_enabled('size_mul'):
return None
m_val = int(method_name[9:-1])
return G_size_mul_worker(t_type, m_val)
if re.match('^mul<[ ]*[_a-zA-Z][ _a-zA-Z0-9]*>$', method_name):
if not self._is_enabled('mul'):
return None
t1_name = method_name[4:-1]
try:
t1_type = gdb.lookup_type(t1_name)
return G_mul_worker(t_type, t1_type)
except gdb.error:
return None
global_dm_list = [
SimpleXMethodMatcher(r'A_plus_A',
r'^dop::A$',
r'operator\+',
A_plus_A,
# This is a replacement, hence match the arg type
# exactly!
type_A.const().reference()),
SimpleXMethodMatcher(r'plus_plus_A',
r'^dop::A$',
r'operator\+\+',
plus_plus_A),
SimpleXMethodMatcher(r'A_geta',
r'^dop::A$',
r'^geta$',
A_geta),
SimpleXMethodMatcher(r'A_getarrayind',
r'^dop::A$',
r'^getarrayind$',
A_getarrayind,
type_int),
SimpleXMethodMatcher(r'A_indexoper',
r'^dop::A$',
r'operator\[\]',
A_indexoper,
type_int),
SimpleXMethodMatcher(r'B_indexoper',
r'^dop::B$',
r'operator\[\]',
B_indexoper,
type_int)
]
for matcher in global_dm_list:
gdb.xmethod.register_xmethod_matcher(gdb, matcher)
gdb.xmethod.register_xmethod_matcher(gdb.current_progspace(),
G_methods_matcher())
gdb.xmethod.register_xmethod_matcher(gdb.current_progspace(),
E_method_matcher())
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