# Xmethods for libstdc++.
-# Copyright (C) 2014-2018 Free Software Foundation, Inc.
+# Copyright (C) 2014-2024 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
matcher_name_prefix = 'libstdc++::'
+
def get_bool_type():
return gdb.lookup_type('bool')
def get_std_size_type():
return gdb.lookup_type('std::size_t')
+_versioned_namespace = '__8::'
+
+def is_specialization_of(x, template_name):
+ """
+ Test whether a type is a specialization of the named class template.
+ The type can be specified as a string or a gdb.Type object.
+ The template should be the name of a class template as a string,
+ without any 'std' qualification.
+ """
+ if isinstance(x, gdb.Type):
+ x = x.tag
+ template_name = '(%s)?%s' % (_versioned_namespace, template_name)
+ return re.match(r'^std::(__\d::)?%s<.*>$' % template_name, x) is not None
+
class LibStdCxxXMethod(gdb.xmethod.XMethod):
def __init__(self, name, worker_class):
gdb.xmethod.XMethod.__init__(self, name)
# Xmethods for std::array
+
class ArrayWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, val_type, size):
self._val_type = val_type
nullptr = gdb.parse_and_eval('(void *) 0')
return nullptr.cast(self._val_type.pointer()).dereference()
+
class ArraySizeWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
def __call__(self, obj):
return self._size
+
class ArrayEmptyWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
def __call__(self, obj):
return (int(self._size) == 0)
+
class ArrayFrontWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
else:
return self.null_value()
+
class ArrayBackWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
else:
return self.null_value()
+
class ArrayAtWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
((int(index), self._size)))
return obj['_M_elems'][index]
+
class ArraySubscriptWorker(ArrayWorkerBase):
def __init__(self, val_type, size):
ArrayWorkerBase.__init__(self, val_type, size)
else:
return self.null_value()
+
class ArrayMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
self.methods = [self._method_dict[m] for m in self._method_dict]
def match(self, class_type, method_name):
- if not re.match('^std::(__\d+::)?array<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'array'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
return None
return method.worker_class(value_type, size)
+
# Xmethods for std::deque
+
class DequeWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, val_type):
self._val_type = val_type
self._bufsize = 512 // val_type.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)
+ start = obj['_M_impl']['_M_start']
+ finish = obj['_M_impl']['_M_finish']
+ if start['_M_cur'] == finish['_M_cur']:
+ return 0
+ return (self._bufsize
+ * (finish['_M_node'] - start['_M_node'] - 1)
+ + (finish['_M_cur'] - finish['_M_first'])
+ + (start['_M_last'] - start['_M_cur']))
def index(self, obj, idx):
- first_node = obj['_M_impl']['_M_start']['_M_node']
- index_node = first_node + int(idx) // self._bufsize
- return index_node[0][idx % self._bufsize]
+ start = obj['_M_impl']['_M_start']
+ first_node_size = start['_M_last'] - start['_M_cur']
+ if idx < first_node_size:
+ return start['_M_cur'][idx]
+ idx = idx - first_node_size
+ index_node = start['_M_node'][1 + int(idx) // self._bufsize]
+ return index_node[idx % self._bufsize]
+
class DequeEmptyWorker(DequeWorkerBase):
def get_arg_types(self):
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']):
+ 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 get_std_size_type()
def __call__(self, obj, subscript):
return self.index(obj, subscript)
+
class DequeAtWorker(DequeWorkerBase):
def get_arg_types(self):
return get_std_size_type()
raise IndexError('Deque index "%d" should not be >= %d.' %
(int(index), deque_size))
else:
- return self.index(obj, index)
+ return self.index(obj, index)
+
class DequeMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
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+::)?deque<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'deque'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for std::forward_list
+
class ForwardListWorkerBase(gdb.xmethod.XMethodMatcher):
def __init__(self, val_type, node_type):
self._val_type = val_type
def get_arg_types(self):
return None
+
class ForwardListEmptyWorker(ForwardListWorkerBase):
def get_result_type(self, obj):
return get_bool_type()
def __call__(self, obj):
return obj['_M_impl']['_M_head']['_M_next'] == 0
+
class ForwardListFrontWorker(ForwardListWorkerBase):
def get_result_type(self, obj):
return self._val_type
val_address = node['_M_storage']['_M_storage'].address
return val_address.cast(self._val_type.pointer()).dereference()
+
class ForwardListMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
matcher_name = matcher_name_prefix + 'forward_list'
self.methods = [self._method_dict[m] for m in self._method_dict]
def match(self, class_type, method_name):
- if not re.match('^std::(__\d+::)?forward_list<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'forward_list'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for std::list
+
class ListWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, val_type, node_type):
self._val_type = val_type
addr = node['_M_storage'].address
return addr.cast(self._val_type.pointer()).dereference()
+
class ListEmptyWorker(ListWorkerBase):
def get_result_type(self, obj):
return get_bool_type()
else:
return False
+
class ListSizeWorker(ListWorkerBase):
def get_result_type(self, obj):
return get_std_size_type()
size += 1
return size
+
class ListFrontWorker(ListWorkerBase):
def get_result_type(self, obj):
return self._val_type
node = obj['_M_impl']['_M_node']['_M_next'].cast(self._node_type)
return self.get_value_from_node(node)
+
class ListBackWorker(ListWorkerBase):
def get_result_type(self, obj):
return self._val_type
prev_node = obj['_M_impl']['_M_node']['_M_prev'].cast(self._node_type)
return self.get_value_from_node(prev_node)
+
class ListMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
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+::)?(__cxx11::)?list<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, '(__cxx11::)?list'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for std::vector
+
class VectorWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, val_type):
self._val_type = val_type
else:
return obj['_M_impl']['_M_start'][index]
+
class VectorEmptyWorker(VectorWorkerBase):
def get_arg_types(self):
return None
def __call__(self, obj):
return int(self.size(obj)) == 0
+
class VectorSizeWorker(VectorWorkerBase):
def get_arg_types(self):
return None
def __call__(self, obj):
return self.size(obj)
+
class VectorFrontWorker(VectorWorkerBase):
def get_arg_types(self):
return None
def __call__(self, obj):
return self.get(obj, 0)
+
class VectorBackWorker(VectorWorkerBase):
def get_arg_types(self):
return None
def __call__(self, obj):
return self.get(obj, int(self.size(obj)) - 1)
+
class VectorAtWorker(VectorWorkerBase):
def get_arg_types(self):
return get_std_size_type()
((int(index), size)))
return self.get(obj, int(index))
+
class VectorSubscriptWorker(VectorWorkerBase):
def get_arg_types(self):
return get_std_size_type()
def __call__(self, obj, subscript):
return self.get(obj, int(subscript))
+
class VectorMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
self.methods = [self._method_dict[m] for m in self._method_dict]
def match(self, class_type, method_name):
- if not re.match('^std::(__\d+::)?vector<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'vector'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for associative containers
+
class AssociativeContainerWorkerBase(gdb.xmethod.XMethodWorker):
def __init__(self, unordered):
self._unordered = unordered
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,
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<.*>$' % self._name, class_type.tag):
+ if not is_specialization_of(class_type, self._name):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for std::unique_ptr
+
class UniquePtrGetWorker(gdb.xmethod.XMethodWorker):
- "Implements std::unique_ptr<T>::get() and std::unique_ptr<T>::operator->()"
+ """
+ Implement std::unique_ptr<T>::get() and std::unique_ptr<T>::operator->().
+ """
def __init__(self, elem_type):
self._is_array = elem_type.code == gdb.TYPE_CODE_ARRAY
return self._elem_type.pointer()
def _supports(self, method_name):
- "operator-> is not supported for unique_ptr<T[]>"
+ # operator-> is not supported for unique_ptr<T[]>
return method_name == 'get' or not self._is_array
def __call__(self, obj):
impl_type = obj.dereference().type.fields()[0].type.tag
- if re.match('^std::(__\d+::)?__uniq_ptr_impl<.*>$', impl_type): # New implementation
- return obj['_M_t']['_M_t']['_M_head_impl']
- elif re.match('^std::(__\d+::)?tuple<.*>$', impl_type):
- return obj['_M_t']['_M_head_impl']
- return None
+ # Check for new implementations first:
+ if is_specialization_of(impl_type, '__uniq_ptr_(data|impl)'):
+ tuple_member = obj['_M_t']['_M_t']
+ elif is_specialization_of(impl_type, 'tuple'):
+ tuple_member = obj['_M_t']
+ else:
+ return None
+ tuple_impl_type = tuple_member.type.fields()[0].type # _Tuple_impl
+ tuple_head_type = tuple_impl_type.fields()[1].type # _Head_base
+ head_field = tuple_head_type.fields()[0]
+ if head_field.name == '_M_head_impl':
+ return tuple_member.cast(tuple_head_type)['_M_head_impl']
+ elif head_field.is_base_class:
+ return tuple_member.cast(head_field.type)
+ else:
+ return None
+
class UniquePtrDerefWorker(UniquePtrGetWorker):
- "Implements std::unique_ptr<T>::operator*()"
+ """Implement std::unique_ptr<T>::operator*()."""
def __init__(self, elem_type):
UniquePtrGetWorker.__init__(self, elem_type)
return self._elem_type
def _supports(self, method_name):
- "operator* is not supported for unique_ptr<T[]>"
+ # operator* is not supported for unique_ptr<T[]>
return not self._is_array
def __call__(self, obj):
return UniquePtrGetWorker.__call__(self, obj).dereference()
+
class UniquePtrSubscriptWorker(UniquePtrGetWorker):
- "Implements std::unique_ptr<T>::operator[](size_t)"
+ """Implement std::unique_ptr<T>::operator[](size_t)."""
def __init__(self, elem_type):
UniquePtrGetWorker.__init__(self, elem_type)
return self._elem_type
def _supports(self, method_name):
- "operator[] is only supported for unique_ptr<T[]>"
+ # operator[] is only supported for unique_ptr<T[]>
return self._is_array
def __call__(self, obj, index):
return UniquePtrGetWorker.__call__(self, obj)[index]
+
class UniquePtrMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
self.methods = [self._method_dict[m] for m in self._method_dict]
def match(self, class_type, method_name):
- if not re.match('^std::(__\d+::)?unique_ptr<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'unique_ptr'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
# Xmethods for std::shared_ptr
+
class SharedPtrGetWorker(gdb.xmethod.XMethodWorker):
- "Implements std::shared_ptr<T>::get() and std::shared_ptr<T>::operator->()"
+ """
+ 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
return self._elem_type.pointer()
def _supports(self, method_name):
- "operator-> is not supported for shared_ptr<T[]>"
+ # 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*()"
+ """Implement std::shared_ptr<T>::operator*()."""
def __init__(self, elem_type):
SharedPtrGetWorker.__init__(self, elem_type)
return self._elem_type
def _supports(self, method_name):
- "operator* is not supported for shared_ptr<T[]>"
+ # 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)"
+ """Implement std::shared_ptr<T>::operator[](size_t)."""
def __init__(self, elem_type):
SharedPtrGetWorker.__init__(self, elem_type)
return self._elem_type
def _supports(self, method_name):
- "operator[] is only supported for shared_ptr<T[]>"
+ # 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))
+ m = re.match(r'.*\[(\d+)]$', str(self._elem_type))
if m and index >= int(m.group(1)):
raise IndexError('shared_ptr<%s> index "%d" should not be >= %d.' %
(self._elem_type, int(index), int(m.group(1))))
return SharedPtrGetWorker.__call__(self, obj)[index]
+
class SharedPtrUseCountWorker(gdb.xmethod.XMethodWorker):
- "Implements std::shared_ptr<T>::use_count()"
+ """Implement std::shared_ptr<T>::use_count()."""
def __init__(self, elem_type):
- SharedPtrUseCountWorker.__init__(self, elem_type)
+ pass
def get_arg_types(self):
return None
def get_result_type(self, obj):
return gdb.lookup_type('long')
+ def _supports(self, method_name):
+ return True
+
def __call__(self, obj):
- refcounts = ['_M_refcount']['_M_pi']
+ refcounts = obj['_M_refcount']['_M_pi']
return refcounts['_M_use_count'] if refcounts else 0
+
class SharedPtrUniqueWorker(SharedPtrUseCountWorker):
- "Implements std::shared_ptr<T>::unique()"
+ """Implement std::shared_ptr<T>::unique()."""
def __init__(self, elem_type):
SharedPtrUseCountWorker.__init__(self, elem_type)
def __call__(self, obj):
return SharedPtrUseCountWorker.__call__(self, obj) == 1
+
class SharedPtrMethodsMatcher(gdb.xmethod.XMethodMatcher):
def __init__(self):
gdb.xmethod.XMethodMatcher.__init__(self,
self.methods = [self._method_dict[m] for m in self._method_dict]
def match(self, class_type, method_name):
- if not re.match('^std::(__\d+::)?shared_ptr<.*>$', class_type.tag):
+ if not is_specialization_of(class_type, 'shared_ptr'):
return None
method = self._method_dict.get(method_name)
if method is None or not method.enabled:
return worker
return None
\f
+
def register_libstdcxx_xmethods(locus):
gdb.xmethod.register_xmethod_matcher(locus, ArrayMethodsMatcher())
gdb.xmethod.register_xmethod_matcher(locus, ForwardListMethodsMatcher())
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