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# Copyright 2014-2021 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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