806 lines
28 KiB
Python
806 lines
28 KiB
Python
# Xmethods for libstdc++.
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# Copyright (C) 2014-2022 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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import gdb
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import gdb.xmethod
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import re
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matcher_name_prefix = 'libstdc++::'
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def get_bool_type():
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return gdb.lookup_type('bool')
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def get_std_size_type():
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return gdb.lookup_type('std::size_t')
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class LibStdCxxXMethod(gdb.xmethod.XMethod):
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def __init__(self, name, worker_class):
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gdb.xmethod.XMethod.__init__(self, name)
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self.worker_class = worker_class
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# Xmethods for std::array
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class ArrayWorkerBase(gdb.xmethod.XMethodWorker):
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def __init__(self, val_type, size):
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self._val_type = val_type
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self._size = size
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def null_value(self):
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nullptr = gdb.parse_and_eval('(void *) 0')
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return nullptr.cast(self._val_type.pointer()).dereference()
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class ArraySizeWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_std_size_type()
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def __call__(self, obj):
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return self._size
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class ArrayEmptyWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_bool_type()
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def __call__(self, obj):
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return (int(self._size) == 0)
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class ArrayFrontWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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if int(self._size) > 0:
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return obj['_M_elems'][0]
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else:
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return self.null_value()
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class ArrayBackWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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if int(self._size) > 0:
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return obj['_M_elems'][self._size - 1]
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else:
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return self.null_value()
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class ArrayAtWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, index):
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return self._val_type
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def __call__(self, obj, index):
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if int(index) >= int(self._size):
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raise IndexError('Array index "%d" should not be >= %d.' %
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((int(index), self._size)))
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return obj['_M_elems'][index]
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class ArraySubscriptWorker(ArrayWorkerBase):
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def __init__(self, val_type, size):
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ArrayWorkerBase.__init__(self, val_type, size)
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, index):
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return self._val_type
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def __call__(self, obj, index):
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if int(self._size) > 0:
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return obj['_M_elems'][index]
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else:
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return self.null_value()
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class ArrayMethodsMatcher(gdb.xmethod.XMethodMatcher):
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def __init__(self):
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gdb.xmethod.XMethodMatcher.__init__(self,
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matcher_name_prefix + 'array')
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self._method_dict = {
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'size': LibStdCxxXMethod('size', ArraySizeWorker),
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'empty': LibStdCxxXMethod('empty', ArrayEmptyWorker),
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'front': LibStdCxxXMethod('front', ArrayFrontWorker),
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'back': LibStdCxxXMethod('back', ArrayBackWorker),
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'at': LibStdCxxXMethod('at', ArrayAtWorker),
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'operator[]': LibStdCxxXMethod('operator[]', ArraySubscriptWorker),
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}
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self.methods = [self._method_dict[m] for m in self._method_dict]
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def match(self, class_type, method_name):
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if not re.match('^std::(__\d+::)?array<.*>$', class_type.tag):
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return None
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method = self._method_dict.get(method_name)
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if method is None or not method.enabled:
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return None
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try:
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value_type = class_type.template_argument(0)
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size = class_type.template_argument(1)
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except:
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return None
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return method.worker_class(value_type, size)
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# Xmethods for std::deque
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class DequeWorkerBase(gdb.xmethod.XMethodWorker):
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def __init__(self, val_type):
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self._val_type = val_type
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self._bufsize = 512 // val_type.sizeof or 1
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def size(self, obj):
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first_node = obj['_M_impl']['_M_start']['_M_node']
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last_node = obj['_M_impl']['_M_finish']['_M_node']
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cur = obj['_M_impl']['_M_finish']['_M_cur']
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first = obj['_M_impl']['_M_finish']['_M_first']
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return (last_node - first_node) * self._bufsize + (cur - first)
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def index(self, obj, idx):
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first_node = obj['_M_impl']['_M_start']['_M_node']
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index_node = first_node + int(idx) // self._bufsize
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return index_node[0][idx % self._bufsize]
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class DequeEmptyWorker(DequeWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_bool_type()
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def __call__(self, obj):
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return (obj['_M_impl']['_M_start']['_M_cur'] ==
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obj['_M_impl']['_M_finish']['_M_cur'])
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class DequeSizeWorker(DequeWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_std_size_type()
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def __call__(self, obj):
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return self.size(obj)
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class DequeFrontWorker(DequeWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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return obj['_M_impl']['_M_start']['_M_cur'][0]
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class DequeBackWorker(DequeWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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if (obj['_M_impl']['_M_finish']['_M_cur'] ==
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obj['_M_impl']['_M_finish']['_M_first']):
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prev_node = obj['_M_impl']['_M_finish']['_M_node'] - 1
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return prev_node[0][self._bufsize - 1]
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else:
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return obj['_M_impl']['_M_finish']['_M_cur'][-1]
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class DequeSubscriptWorker(DequeWorkerBase):
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, subscript):
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return self._val_type
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def __call__(self, obj, subscript):
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return self.index(obj, subscript)
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class DequeAtWorker(DequeWorkerBase):
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, index):
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return self._val_type
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def __call__(self, obj, index):
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deque_size = int(self.size(obj))
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if int(index) >= deque_size:
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raise IndexError('Deque index "%d" should not be >= %d.' %
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(int(index), deque_size))
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else:
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return self.index(obj, index)
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class DequeMethodsMatcher(gdb.xmethod.XMethodMatcher):
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def __init__(self):
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gdb.xmethod.XMethodMatcher.__init__(self,
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matcher_name_prefix + 'deque')
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self._method_dict = {
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'empty': LibStdCxxXMethod('empty', DequeEmptyWorker),
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'size': LibStdCxxXMethod('size', DequeSizeWorker),
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'front': LibStdCxxXMethod('front', DequeFrontWorker),
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'back': LibStdCxxXMethod('back', DequeBackWorker),
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'operator[]': LibStdCxxXMethod('operator[]', DequeSubscriptWorker),
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'at': LibStdCxxXMethod('at', DequeAtWorker)
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}
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self.methods = [self._method_dict[m] for m in self._method_dict]
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def match(self, class_type, method_name):
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if not re.match('^std::(__\d+::)?deque<.*>$', class_type.tag):
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return None
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method = self._method_dict.get(method_name)
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if method is None or not method.enabled:
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return None
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return method.worker_class(class_type.template_argument(0))
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# Xmethods for std::forward_list
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class ForwardListWorkerBase(gdb.xmethod.XMethodMatcher):
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def __init__(self, val_type, node_type):
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self._val_type = val_type
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self._node_type = node_type
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def get_arg_types(self):
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return None
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class ForwardListEmptyWorker(ForwardListWorkerBase):
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def get_result_type(self, obj):
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return get_bool_type()
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def __call__(self, obj):
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return obj['_M_impl']['_M_head']['_M_next'] == 0
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class ForwardListFrontWorker(ForwardListWorkerBase):
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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node = obj['_M_impl']['_M_head']['_M_next'].cast(self._node_type)
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val_address = node['_M_storage']['_M_storage'].address
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return val_address.cast(self._val_type.pointer()).dereference()
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class ForwardListMethodsMatcher(gdb.xmethod.XMethodMatcher):
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def __init__(self):
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matcher_name = matcher_name_prefix + 'forward_list'
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gdb.xmethod.XMethodMatcher.__init__(self, matcher_name)
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self._method_dict = {
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'empty': LibStdCxxXMethod('empty', ForwardListEmptyWorker),
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'front': LibStdCxxXMethod('front', ForwardListFrontWorker)
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}
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self.methods = [self._method_dict[m] for m in self._method_dict]
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def match(self, class_type, method_name):
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if not re.match('^std::(__\d+::)?forward_list<.*>$', class_type.tag):
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return None
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method = self._method_dict.get(method_name)
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if method is None or not method.enabled:
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return None
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val_type = class_type.template_argument(0)
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node_type = gdb.lookup_type(str(class_type) + '::_Node').pointer()
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return method.worker_class(val_type, node_type)
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# Xmethods for std::list
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class ListWorkerBase(gdb.xmethod.XMethodWorker):
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def __init__(self, val_type, node_type):
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self._val_type = val_type
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self._node_type = node_type
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def get_arg_types(self):
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return None
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def get_value_from_node(self, node):
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node = node.dereference()
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if node.type.fields()[1].name == '_M_data':
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# C++03 implementation, node contains the value as a member
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return node['_M_data']
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# C++11 implementation, node stores value in __aligned_membuf
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addr = node['_M_storage'].address
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return addr.cast(self._val_type.pointer()).dereference()
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class ListEmptyWorker(ListWorkerBase):
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def get_result_type(self, obj):
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return get_bool_type()
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def __call__(self, obj):
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base_node = obj['_M_impl']['_M_node']
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if base_node['_M_next'] == base_node.address:
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return True
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else:
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return False
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class ListSizeWorker(ListWorkerBase):
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def get_result_type(self, obj):
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return get_std_size_type()
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def __call__(self, obj):
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begin_node = obj['_M_impl']['_M_node']['_M_next']
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end_node = obj['_M_impl']['_M_node'].address
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size = 0
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while begin_node != end_node:
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begin_node = begin_node['_M_next']
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size += 1
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return size
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class ListFrontWorker(ListWorkerBase):
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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node = obj['_M_impl']['_M_node']['_M_next'].cast(self._node_type)
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return self.get_value_from_node(node)
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class ListBackWorker(ListWorkerBase):
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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prev_node = obj['_M_impl']['_M_node']['_M_prev'].cast(self._node_type)
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return self.get_value_from_node(prev_node)
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class ListMethodsMatcher(gdb.xmethod.XMethodMatcher):
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def __init__(self):
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gdb.xmethod.XMethodMatcher.__init__(self,
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matcher_name_prefix + 'list')
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self._method_dict = {
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'empty': LibStdCxxXMethod('empty', ListEmptyWorker),
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'size': LibStdCxxXMethod('size', ListSizeWorker),
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'front': LibStdCxxXMethod('front', ListFrontWorker),
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'back': LibStdCxxXMethod('back', ListBackWorker)
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}
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self.methods = [self._method_dict[m] for m in self._method_dict]
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def match(self, class_type, method_name):
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if not re.match('^std::(__\d+::)?(__cxx11::)?list<.*>$', class_type.tag):
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return None
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method = self._method_dict.get(method_name)
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if method is None or not method.enabled:
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return None
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val_type = class_type.template_argument(0)
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node_type = gdb.lookup_type(str(class_type) + '::_Node').pointer()
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return method.worker_class(val_type, node_type)
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# Xmethods for std::vector
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class VectorWorkerBase(gdb.xmethod.XMethodWorker):
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def __init__(self, val_type):
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self._val_type = val_type
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def size(self, obj):
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if self._val_type.code == gdb.TYPE_CODE_BOOL:
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start = obj['_M_impl']['_M_start']['_M_p']
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finish = obj['_M_impl']['_M_finish']['_M_p']
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finish_offset = obj['_M_impl']['_M_finish']['_M_offset']
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bit_size = start.dereference().type.sizeof * 8
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return (finish - start) * bit_size + finish_offset
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else:
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return obj['_M_impl']['_M_finish'] - obj['_M_impl']['_M_start']
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def get(self, obj, index):
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if self._val_type.code == gdb.TYPE_CODE_BOOL:
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start = obj['_M_impl']['_M_start']['_M_p']
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bit_size = start.dereference().type.sizeof * 8
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valp = start + index // bit_size
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offset = index % bit_size
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return (valp.dereference() & (1 << offset)) > 0
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else:
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return obj['_M_impl']['_M_start'][index]
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class VectorEmptyWorker(VectorWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_bool_type()
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def __call__(self, obj):
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return int(self.size(obj)) == 0
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class VectorSizeWorker(VectorWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return get_std_size_type()
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def __call__(self, obj):
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return self.size(obj)
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class VectorFrontWorker(VectorWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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return self.get(obj, 0)
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class VectorBackWorker(VectorWorkerBase):
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def get_arg_types(self):
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return None
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def get_result_type(self, obj):
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return self._val_type
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def __call__(self, obj):
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return self.get(obj, int(self.size(obj)) - 1)
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class VectorAtWorker(VectorWorkerBase):
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, index):
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return self._val_type
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def __call__(self, obj, index):
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size = int(self.size(obj))
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if int(index) >= size:
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raise IndexError('Vector index "%d" should not be >= %d.' %
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((int(index), size)))
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return self.get(obj, int(index))
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class VectorSubscriptWorker(VectorWorkerBase):
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def get_arg_types(self):
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return get_std_size_type()
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def get_result_type(self, obj, subscript):
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return self._val_type
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def __call__(self, obj, subscript):
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return self.get(obj, int(subscript))
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class VectorMethodsMatcher(gdb.xmethod.XMethodMatcher):
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def __init__(self):
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gdb.xmethod.XMethodMatcher.__init__(self,
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matcher_name_prefix + 'vector')
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self._method_dict = {
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'size': LibStdCxxXMethod('size', VectorSizeWorker),
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'empty': LibStdCxxXMethod('empty', VectorEmptyWorker),
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'front': LibStdCxxXMethod('front', VectorFrontWorker),
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'back': LibStdCxxXMethod('back', VectorBackWorker),
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'at': LibStdCxxXMethod('at', VectorAtWorker),
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'operator[]': LibStdCxxXMethod('operator[]',
|
||
VectorSubscriptWorker),
|
||
}
|
||
self.methods = [self._method_dict[m] for m in self._method_dict]
|
||
|
||
def match(self, class_type, method_name):
|
||
if not re.match('^std::(__\d+::)?vector<.*>$', class_type.tag):
|
||
return None
|
||
method = self._method_dict.get(method_name)
|
||
if method is None or not method.enabled:
|
||
return None
|
||
return method.worker_class(class_type.template_argument(0))
|
||
|
||
# Xmethods for associative containers
|
||
|
||
class AssociativeContainerWorkerBase(gdb.xmethod.XMethodWorker):
|
||
def __init__(self, unordered):
|
||
self._unordered = unordered
|
||
|
||
def node_count(self, obj):
|
||
if self._unordered:
|
||
return obj['_M_h']['_M_element_count']
|
||
else:
|
||
return obj['_M_t']['_M_impl']['_M_node_count']
|
||
|
||
def get_arg_types(self):
|
||
return None
|
||
|
||
class AssociativeContainerEmptyWorker(AssociativeContainerWorkerBase):
|
||
def get_result_type(self, obj):
|
||
return get_bool_type()
|
||
|
||
def __call__(self, obj):
|
||
return int(self.node_count(obj)) == 0
|
||
|
||
class AssociativeContainerSizeWorker(AssociativeContainerWorkerBase):
|
||
def get_result_type(self, obj):
|
||
return get_std_size_type()
|
||
|
||
def __call__(self, obj):
|
||
return self.node_count(obj)
|
||
|
||
class AssociativeContainerMethodsMatcher(gdb.xmethod.XMethodMatcher):
|
||
def __init__(self, name):
|
||
gdb.xmethod.XMethodMatcher.__init__(self,
|
||
matcher_name_prefix + name)
|
||
self._name = name
|
||
self._method_dict = {
|
||
'size': LibStdCxxXMethod('size', AssociativeContainerSizeWorker),
|
||
'empty': LibStdCxxXMethod('empty',
|
||
AssociativeContainerEmptyWorker),
|
||
}
|
||
self.methods = [self._method_dict[m] for m in self._method_dict]
|
||
|
||
def match(self, class_type, method_name):
|
||
if not re.match('^std::(__\d+::)?%s<.*>$' % self._name, class_type.tag):
|
||
return None
|
||
method = self._method_dict.get(method_name)
|
||
if method is None or not method.enabled:
|
||
return None
|
||
unordered = 'unordered' in self._name
|
||
return method.worker_class(unordered)
|
||
|
||
# Xmethods for std::unique_ptr
|
||
|
||
class UniquePtrGetWorker(gdb.xmethod.XMethodWorker):
|
||
"Implements std::unique_ptr<T>::get() and std::unique_ptr<T>::operator->()"
|
||
|
||
def __init__(self, elem_type):
|
||
self._is_array = elem_type.code == gdb.TYPE_CODE_ARRAY
|
||
if self._is_array:
|
||
self._elem_type = elem_type.target()
|
||
else:
|
||
self._elem_type = elem_type
|
||
|
||
def get_arg_types(self):
|
||
return None
|
||
|
||
def get_result_type(self, obj):
|
||
return self._elem_type.pointer()
|
||
|
||
def _supports(self, method_name):
|
||
"operator-> is not supported for unique_ptr<T[]>"
|
||
return method_name == 'get' or not self._is_array
|
||
|
||
def __call__(self, obj):
|
||
impl_type = obj.dereference().type.fields()[0].type.tag
|
||
# Check for new implementations first:
|
||
if re.match('^std::(__\d+::)?__uniq_ptr_(data|impl)<.*>$', impl_type):
|
||
tuple_member = obj['_M_t']['_M_t']
|
||
elif re.match('^std::(__\d+::)?tuple<.*>$', impl_type):
|
||
tuple_member = obj['_M_t']
|
||
else:
|
||
return None
|
||
tuple_impl_type = tuple_member.type.fields()[0].type # _Tuple_impl
|
||
tuple_head_type = tuple_impl_type.fields()[1].type # _Head_base
|
||
head_field = tuple_head_type.fields()[0]
|
||
if head_field.name == '_M_head_impl':
|
||
return tuple_member.cast(tuple_head_type)['_M_head_impl']
|
||
elif head_field.is_base_class:
|
||
return tuple_member.cast(head_field.type)
|
||
else:
|
||
return None
|
||
|
||
class UniquePtrDerefWorker(UniquePtrGetWorker):
|
||
"Implements std::unique_ptr<T>::operator*()"
|
||
|
||
def __init__(self, elem_type):
|
||
UniquePtrGetWorker.__init__(self, elem_type)
|
||
|
||
def get_result_type(self, obj):
|
||
return self._elem_type
|
||
|
||
def _supports(self, method_name):
|
||
"operator* is not supported for unique_ptr<T[]>"
|
||
return not self._is_array
|
||
|
||
def __call__(self, obj):
|
||
return UniquePtrGetWorker.__call__(self, obj).dereference()
|
||
|
||
class UniquePtrSubscriptWorker(UniquePtrGetWorker):
|
||
"Implements std::unique_ptr<T>::operator[](size_t)"
|
||
|
||
def __init__(self, elem_type):
|
||
UniquePtrGetWorker.__init__(self, elem_type)
|
||
|
||
def get_arg_types(self):
|
||
return get_std_size_type()
|
||
|
||
def get_result_type(self, obj, index):
|
||
return self._elem_type
|
||
|
||
def _supports(self, method_name):
|
||
"operator[] is only supported for unique_ptr<T[]>"
|
||
return self._is_array
|
||
|
||
def __call__(self, obj, index):
|
||
return UniquePtrGetWorker.__call__(self, obj)[index]
|
||
|
||
class UniquePtrMethodsMatcher(gdb.xmethod.XMethodMatcher):
|
||
def __init__(self):
|
||
gdb.xmethod.XMethodMatcher.__init__(self,
|
||
matcher_name_prefix + 'unique_ptr')
|
||
self._method_dict = {
|
||
'get': LibStdCxxXMethod('get', UniquePtrGetWorker),
|
||
'operator->': LibStdCxxXMethod('operator->', UniquePtrGetWorker),
|
||
'operator*': LibStdCxxXMethod('operator*', UniquePtrDerefWorker),
|
||
'operator[]': LibStdCxxXMethod('operator[]', UniquePtrSubscriptWorker),
|
||
}
|
||
self.methods = [self._method_dict[m] for m in self._method_dict]
|
||
|
||
def match(self, class_type, method_name):
|
||
if not re.match('^std::(__\d+::)?unique_ptr<.*>$', class_type.tag):
|
||
return None
|
||
method = self._method_dict.get(method_name)
|
||
if method is None or not method.enabled:
|
||
return None
|
||
worker = method.worker_class(class_type.template_argument(0))
|
||
if worker._supports(method_name):
|
||
return worker
|
||
return None
|
||
|
||
# Xmethods for std::shared_ptr
|
||
|
||
class SharedPtrGetWorker(gdb.xmethod.XMethodWorker):
|
||
"Implements std::shared_ptr<T>::get() and std::shared_ptr<T>::operator->()"
|
||
|
||
def __init__(self, elem_type):
|
||
self._is_array = elem_type.code == gdb.TYPE_CODE_ARRAY
|
||
if self._is_array:
|
||
self._elem_type = elem_type.target()
|
||
else:
|
||
self._elem_type = elem_type
|
||
|
||
def get_arg_types(self):
|
||
return None
|
||
|
||
def get_result_type(self, obj):
|
||
return self._elem_type.pointer()
|
||
|
||
def _supports(self, method_name):
|
||
"operator-> is not supported for shared_ptr<T[]>"
|
||
return method_name == 'get' or not self._is_array
|
||
|
||
def __call__(self, obj):
|
||
return obj['_M_ptr']
|
||
|
||
class SharedPtrDerefWorker(SharedPtrGetWorker):
|
||
"Implements std::shared_ptr<T>::operator*()"
|
||
|
||
def __init__(self, elem_type):
|
||
SharedPtrGetWorker.__init__(self, elem_type)
|
||
|
||
def get_result_type(self, obj):
|
||
return self._elem_type
|
||
|
||
def _supports(self, method_name):
|
||
"operator* is not supported for shared_ptr<T[]>"
|
||
return not self._is_array
|
||
|
||
def __call__(self, obj):
|
||
return SharedPtrGetWorker.__call__(self, obj).dereference()
|
||
|
||
class SharedPtrSubscriptWorker(SharedPtrGetWorker):
|
||
"Implements std::shared_ptr<T>::operator[](size_t)"
|
||
|
||
def __init__(self, elem_type):
|
||
SharedPtrGetWorker.__init__(self, elem_type)
|
||
|
||
def get_arg_types(self):
|
||
return get_std_size_type()
|
||
|
||
def get_result_type(self, obj, index):
|
||
return self._elem_type
|
||
|
||
def _supports(self, method_name):
|
||
"operator[] is only supported for shared_ptr<T[]>"
|
||
return self._is_array
|
||
|
||
def __call__(self, obj, index):
|
||
# Check bounds if _elem_type is an array of known bound
|
||
m = re.match('.*\[(\d+)]$', str(self._elem_type))
|
||
if m and index >= int(m.group(1)):
|
||
raise IndexError('shared_ptr<%s> index "%d" should not be >= %d.' %
|
||
(self._elem_type, int(index), int(m.group(1))))
|
||
return SharedPtrGetWorker.__call__(self, obj)[index]
|
||
|
||
class SharedPtrUseCountWorker(gdb.xmethod.XMethodWorker):
|
||
"Implements std::shared_ptr<T>::use_count()"
|
||
|
||
def __init__(self, elem_type):
|
||
SharedPtrUseCountWorker.__init__(self, elem_type)
|
||
|
||
def get_arg_types(self):
|
||
return None
|
||
|
||
def get_result_type(self, obj):
|
||
return gdb.lookup_type('long')
|
||
|
||
def __call__(self, obj):
|
||
refcounts = obj['_M_refcount']['_M_pi']
|
||
return refcounts['_M_use_count'] if refcounts else 0
|
||
|
||
class SharedPtrUniqueWorker(SharedPtrUseCountWorker):
|
||
"Implements std::shared_ptr<T>::unique()"
|
||
|
||
def __init__(self, elem_type):
|
||
SharedPtrUseCountWorker.__init__(self, elem_type)
|
||
|
||
def get_result_type(self, obj):
|
||
return gdb.lookup_type('bool')
|
||
|
||
def __call__(self, obj):
|
||
return SharedPtrUseCountWorker.__call__(self, obj) == 1
|
||
|
||
class SharedPtrMethodsMatcher(gdb.xmethod.XMethodMatcher):
|
||
def __init__(self):
|
||
gdb.xmethod.XMethodMatcher.__init__(self,
|
||
matcher_name_prefix + 'shared_ptr')
|
||
self._method_dict = {
|
||
'get': LibStdCxxXMethod('get', SharedPtrGetWorker),
|
||
'operator->': LibStdCxxXMethod('operator->', SharedPtrGetWorker),
|
||
'operator*': LibStdCxxXMethod('operator*', SharedPtrDerefWorker),
|
||
'operator[]': LibStdCxxXMethod('operator[]', SharedPtrSubscriptWorker),
|
||
'use_count': LibStdCxxXMethod('use_count', SharedPtrUseCountWorker),
|
||
'unique': LibStdCxxXMethod('unique', SharedPtrUniqueWorker),
|
||
}
|
||
self.methods = [self._method_dict[m] for m in self._method_dict]
|
||
|
||
def match(self, class_type, method_name):
|
||
if not re.match('^std::(__\d+::)?shared_ptr<.*>$', class_type.tag):
|
||
return None
|
||
method = self._method_dict.get(method_name)
|
||
if method is None or not method.enabled:
|
||
return None
|
||
worker = method.worker_class(class_type.template_argument(0))
|
||
if worker._supports(method_name):
|
||
return worker
|
||
return None
|
||
|
||
def register_libstdcxx_xmethods(locus):
|
||
gdb.xmethod.register_xmethod_matcher(locus, ArrayMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(locus, ForwardListMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(locus, DequeMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(locus, ListMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(locus, VectorMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('set'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('map'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('multiset'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('multimap'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('unordered_set'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('unordered_map'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('unordered_multiset'))
|
||
gdb.xmethod.register_xmethod_matcher(
|
||
locus, AssociativeContainerMethodsMatcher('unordered_multimap'))
|
||
gdb.xmethod.register_xmethod_matcher(locus, UniquePtrMethodsMatcher())
|
||
gdb.xmethod.register_xmethod_matcher(locus, SharedPtrMethodsMatcher())
|