-# Xmethods for libstc++.
+# Xmethods for libstdc++.
# Copyright (C) 2014 Free Software Foundation, Inc.
matcher_name_prefix = 'libstdc++::'
-# Xmethods for std::vector
+class LibStdCxxXMethod(gdb.xmethod.XMethod):
+ def __init__(self, name, worker_class):
+ gdb.xmethod.XMethod.__init__(self, name)
+ self.worker_class = worker_class
+
+# Xmethods for std::array
+
+class ArrayWorkerBase(gdb.xmethod.XMethodWorker):
+ def __init__(self, valtype, size):
+ self._valtype = valtype
+ self._size = size
+
+ def null_value(self):
+ nullptr = gdb.parse_and_eval('(void *) 0')
+ return nullptr.cast(self._valtype.pointer()).dereference()
+
+class ArraySizeWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return self._size
+
+class ArrayEmptyWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return (int(self._size) == 0)
+
+class ArrayFrontWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ if int(self._size) > 0:
+ return obj['_M_elems'][0]
+ else:
+ return self.null_value()
+
+class ArrayBackWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ if int(self._size) > 0:
+ return obj['_M_elems'][self._size - 1]
+ else:
+ return self.null_value()
+
+class ArrayAtWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return gdb.lookup_type('std::size_t')
+
+ def __call__(self, obj, index):
+ if int(index) >= int(self._size):
+ raise IndexError('Array index "%d" should not be >= %d.' %
+ ((int(index), self._size)))
+ return obj['_M_elems'][index]
+
+class ArraySubscriptWorker(ArrayWorkerBase):
+ def __init__(self, valtype, size):
+ ArrayWorkerBase.__init__(self, valtype, size)
+
+ def get_arg_types(self):
+ return gdb.lookup_type('std::size_t')
+
+ def __call__(self, obj, index):
+ if int(self._size) > 0:
+ return obj['_M_elems'][index]
+ else:
+ return self.null_value()
-class VectorSizeWorker(gdb.xmethod.XMethodWorker):
+class ArrayMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
- self.name = 'size'
- self.enabled = True
+ gdb.xmethod.XMethodMatcher.__init__(self,
+ matcher_name_prefix + 'array')
+ self._method_dict = {
+ 'size': LibStdCxxXMethod('size', ArraySizeWorker),
+ 'empty': LibStdCxxXMethod('empty', ArrayEmptyWorker),
+ 'front': LibStdCxxXMethod('front', ArrayFrontWorker),
+ 'back': LibStdCxxXMethod('back', ArrayBackWorker),
+ 'at': LibStdCxxXMethod('at', ArrayAtWorker),
+ 'operator[]': LibStdCxxXMethod('operator[]', ArraySubscriptWorker),
+ }
+ self.methods = [self._method_dict[m] for m in self._method_dict]
+
+ def match(self, class_type, method_name):
+ if not re.match('^std::array<.*>$', class_type.tag):
+ return None
+ method = self._method_dict.get(method_name)
+ if method is None or not method.enabled:
+ return None
+ try:
+ value_type = class_type.template_argument(0)
+ size = class_type.template_argument(1)
+ except:
+ return None
+ return method.worker_class(value_type, size)
+
+# Xmethods for std::deque
+
+class DequeWorkerBase(gdb.xmethod.XMethodWorker):
+ def __init__(self, elemtype):
+ self._bufsize = (512 / elemtype.sizeof) or 1
+
+ def size(self, obj):
+ first_node = obj['_M_impl']['_M_start']['_M_node']
+ last_node = obj['_M_impl']['_M_finish']['_M_node']
+ cur = obj['_M_impl']['_M_finish']['_M_cur']
+ first = obj['_M_impl']['_M_finish']['_M_first']
+ return (last_node - first_node) * self._bufsize + (cur - first)
+
+ def index(self, obj, index):
+ first_node = obj['_M_impl']['_M_start']['_M_node']
+ index_node = first_node + index / self._bufsize
+ return index_node[0][index % self._bufsize]
+
+class DequeEmptyWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return (obj['_M_impl']['_M_start']['_M_cur'] ==
+ obj['_M_impl']['_M_finish']['_M_cur'])
+
+class DequeSizeWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return self.size(obj)
+
+class DequeFrontWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return obj['_M_impl']['_M_start']['_M_cur'][0]
+
+class DequeBackWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ if (obj['_M_impl']['_M_finish']['_M_cur'] ==
+ obj['_M_impl']['_M_finish']['_M_first']):
+ prev_node = obj['_M_impl']['_M_finish']['_M_node'] - 1
+ return prev_node[0][self._bufsize - 1]
+ else:
+ return obj['_M_impl']['_M_finish']['_M_cur'][-1]
+
+class DequeSubscriptWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return gdb.lookup_type('std::size_t')
+
+ def __call__(self, obj, subscript):
+ return self.index(obj, subscript)
+
+class DequeAtWorker(DequeWorkerBase):
+ def get_arg_types(self):
+ return gdb.lookup_type('std::size_t')
+
+ def __call__(self, obj, index):
+ deque_size = int(self.size(obj))
+ if int(index) >= deque_size:
+ raise IndexError('Deque index "%d" should not be >= %d.' %
+ (int(index), deque_size))
+ else:
+ return self.index(obj, index)
+
+class DequeMethodsMatcher(gdb.xmethod.XMethodMatcher):
+ def __init__(self):
+ gdb.xmethod.XMethodMatcher.__init__(self,
+ matcher_name_prefix + 'deque')
+ self._method_dict = {
+ 'empty': LibStdCxxXMethod('empty', DequeEmptyWorker),
+ 'size': LibStdCxxXMethod('size', DequeSizeWorker),
+ 'front': LibStdCxxXMethod('front', DequeFrontWorker),
+ 'back': LibStdCxxXMethod('back', DequeBackWorker),
+ 'operator[]': LibStdCxxXMethod('operator[]', DequeSubscriptWorker),
+ 'at': LibStdCxxXMethod('at', DequeAtWorker)
+ }
+ self.methods = [self._method_dict[m] for m in self._method_dict]
+
+ def match(self, class_type, method_name):
+ if not re.match('^std::deque<.*>$', 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 std::forward_list
+
+class ForwardListWorkerBase(gdb.xmethod.XMethodMatcher):
+ def __init__(self, elem_type, node_type):
+ self._elem_type = elem_type
+ self._node_type = node_type
def get_arg_types(self):
return None
+class ForwardListEmptyWorker(ForwardListWorkerBase):
+ def __call__(self, obj):
+ return obj['_M_impl']['_M_head']['_M_next'] == 0
+
+class ForwardListFrontWorker(ForwardListWorkerBase):
def __call__(self, obj):
- return obj['_M_impl']['_M_finish'] - obj['_M_impl']['_M_start']
+ node = obj['_M_impl']['_M_head']['_M_next'].cast(self._node_type)
+ elem_address = node['_M_storage']['_M_storage'].address
+ return elem_address.cast(self._elem_type.pointer()).dereference()
-class VectorSubscriptWorker(gdb.xmethod.XMethodWorker):
+class ForwardListMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
- self.name = 'operator[]'
- self.enabled = True
+ matcher_name = matcher_name_prefix + 'forward_list'
+ gdb.xmethod.XMethodMatcher.__init__(self, matcher_name)
+ self._method_dict = {
+ 'empty': LibStdCxxXMethod('empty', ForwardListEmptyWorker),
+ 'front': LibStdCxxXMethod('front', ForwardListFrontWorker)
+ }
+ self.methods = [self._method_dict[m] for m in self._method_dict]
+
+ def match(self, class_type, method_name):
+ if not re.match('^std::forward_list<.*>$', class_type.tag):
+ return None
+ method = self._method_dict.get(method_name)
+ if method is None or not method.enabled:
+ return None
+ elem_type = class_type.template_argument(0)
+ node_type = gdb.lookup_type(str(class_type) + '::_Node').pointer()
+ return method.worker_class(elem_type, node_type)
+
+# Xmethods for std::list
+
+class ListWorkerBase(gdb.xmethod.XMethodWorker):
+ def __init__(self, node_type):
+ self._node_type = node_type
+
+ def get_arg_types(self):
+ return None
+
+class ListEmptyWorker(ListWorkerBase):
+ def __call__(self, obj):
+ base_node = obj['_M_impl']['_M_node']
+ if base_node['_M_next'] == base_node.address:
+ return True
+ else:
+ return False
+
+class ListSizeWorker(ListWorkerBase):
+ def __call__(self, obj):
+ begin_node = obj['_M_impl']['_M_node']['_M_next']
+ end_node = obj['_M_impl']['_M_node'].address
+ size = 0
+ while begin_node != end_node:
+ begin_node = begin_node['_M_next']
+ size += 1
+ return size
+
+class ListFrontWorker(ListWorkerBase):
+ def __call__(self, obj):
+ node = obj['_M_impl']['_M_node']['_M_next'].cast(self._node_type)
+ return node['_M_data']
+
+class ListBackWorker(ListWorkerBase):
+ def __call__(self, obj):
+ prev_node = obj['_M_impl']['_M_node']['_M_prev'].cast(self._node_type)
+ return prev_node['_M_data']
+
+class ListMethodsMatcher(gdb.xmethod.XMethodMatcher):
+ def __init__(self):
+ gdb.xmethod.XMethodMatcher.__init__(self,
+ matcher_name_prefix + 'list')
+ self._method_dict = {
+ 'empty': LibStdCxxXMethod('empty', ListEmptyWorker),
+ 'size': LibStdCxxXMethod('size', ListSizeWorker),
+ 'front': LibStdCxxXMethod('front', ListFrontWorker),
+ 'back': LibStdCxxXMethod('back', ListBackWorker)
+ }
+ self.methods = [self._method_dict[m] for m in self._method_dict]
+
+ def match(self, class_type, method_name):
+ if not re.match('^std::list<.*>$', class_type.tag):
+ return None
+ method = self._method_dict.get(method_name)
+ if method is None or not method.enabled:
+ return None
+ node_type = gdb.lookup_type(str(class_type) + '::_Node').pointer()
+ return method.worker_class(node_type)
+
+# Xmethods for std::vector
+
+class VectorWorkerBase(gdb.xmethod.XMethodWorker):
+ def __init__(self, elemtype):
+ self._elemtype = elemtype
+
+ def size(self, obj):
+ if self._elemtype.code == gdb.TYPE_CODE_BOOL:
+ start = obj['_M_impl']['_M_start']['_M_p']
+ finish = obj['_M_impl']['_M_finish']['_M_p']
+ finish_offset = obj['_M_impl']['_M_finish']['_M_offset']
+ bit_size = start.dereference().type.sizeof * 8
+ return (finish - start) * bit_size + finish_offset
+ else:
+ return obj['_M_impl']['_M_finish'] - obj['_M_impl']['_M_start']
+
+ def get(self, obj, index):
+ if self._elemtype.code == gdb.TYPE_CODE_BOOL:
+ start = obj['_M_impl']['_M_start']['_M_p']
+ bit_size = start.dereference().type.sizeof * 8
+ valp = start + index / bit_size
+ offset = index % bit_size
+ return (valp.dereference() & (1 << offset)) > 0
+ else:
+ return obj['_M_impl']['_M_start'][index]
+
+class VectorEmptyWorker(VectorWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return int(self.size(obj)) == 0
+
+class VectorSizeWorker(VectorWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return self.size(obj)
+
+class VectorFrontWorker(VectorWorkerBase):
+ def get_arg_types(self):
+ return None
+
+ def __call__(self, obj):
+ return self.get(obj, 0)
+
+class VectorBackWorker(VectorWorkerBase):
+ def get_arg_types(self):
+ return None
+ def __call__(self, obj):
+ return self.get(obj, int(self.size(obj)) - 1)
+
+class VectorAtWorker(VectorWorkerBase):
+ def get_arg_types(self):
+ return gdb.lookup_type('std::size_t')
+
+ def __call__(self, obj, index):
+ size = int(self.size(obj))
+ if int(index) >= size:
+ raise IndexError('Vector index "%d" should not be >= %d.' %
+ ((int(index), size)))
+ return self.get(obj, int(index))
+
+class VectorSubscriptWorker(VectorWorkerBase):
def get_arg_types(self):
return gdb.lookup_type('std::size_t')
def __call__(self, obj, subscript):
- return obj['_M_impl']['_M_start'][subscript]
+ return self.get(obj, int(subscript))
class VectorMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
matcher_name_prefix + 'vector')
- self._subscript_worker = VectorSubscriptWorker()
- self._size_worker = VectorSizeWorker()
- self.methods = [self._subscript_worker, self._size_worker]
+ self._method_dict = {
+ 'size': LibStdCxxXMethod('size', VectorSizeWorker),
+ 'empty': LibStdCxxXMethod('empty', VectorEmptyWorker),
+ 'front': LibStdCxxXMethod('front', VectorFrontWorker),
+ 'back': LibStdCxxXMethod('back', VectorBackWorker),
+ 'at': LibStdCxxXMethod('at', VectorAtWorker),
+ '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::vector<.*>$', class_type.tag):
return None
- if method_name == 'operator[]' and self._subscript_worker.enabled:
- return self._subscript_worker
- elif method_name == 'size' and self._size_worker.enabled:
- return self._size_worker
+ 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 std::unique_ptr
return self._get_worker
\f
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, UniquePtrMethodsMatcher())
projects / gcc.git / commitdiff