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# Pretty-printers for libstdc++. # Copyright (C) 2008-2025 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/>. import gdb import itertools import re import sys import errno import datetime # Python 2 + Python 3 compatibility code # Resources about compatibility: # # * <http://pythonhosted.org/six/>: Documentation of the "six" module # FIXME: The handling of e.g. std::basic_string (at least on char) # probably needs updating to work with Python 3's new string rules. # # In particular, Python 3 has a separate type (called byte) for # bytestrings, and a special b"" syntax for the byte literals; the old # str() type has been redefined to always store Unicode text. # # We probably can't do much about this until this GDB PR is addressed: # <https://sourceware.org/bugzilla/show_bug.cgi?id=17138> if sys.version_info[0] > 2: # Python 3 stuff Iterator = object # Python 3 folds these into the normal functions. imap = map izip = zip # Also, int subsumes long long = int _utc_timezone = datetime.timezone.utc else: # Python 2 stuff class Iterator: """Compatibility mixin for iterators Instead of writing next() methods for iterators, write __next__() methods and use this mixin to make them work in Python 2 as well as Python 3. Idea stolen from the "six" documentation: <http://pythonhosted.org/six/#six.Iterator> """ def next(self): return self.__next__() # In Python 2, we still need these from itertools from itertools import imap, izip # Python 2 does not provide the datetime.UTC singleton. class UTC(datetime.tzinfo): """Concrete tzinfo class representing the UTC time zone.""" def utcoffset(self, dt): return datetime.timedelta(0) def tzname(self, dt): return "UTC" def dst(self, dt): return datetime.timedelta(0) _utc_timezone = UTC() # Try to use the new-style pretty-printing if available. _use_gdb_pp = True try: import gdb.printing except ImportError: _use_gdb_pp = False # Try to install type-printers. _use_type_printing = False try: import gdb.types if hasattr(gdb.types, 'TypePrinter'): _use_type_printing = True except ImportError: pass # Use the base class if available. if hasattr(gdb, 'ValuePrinter'): printer_base = gdb.ValuePrinter else: printer_base = object # Starting with the type ORIG, search for the member type NAME. This # handles searching upward through superclasses. This is needed to # work around http://sourceware.org/bugzilla/show_bug.cgi?id=13615. def find_type(orig, name): typ = orig.strip_typedefs() while True: # Use Type.tag to ignore cv-qualifiers. PR 67440. search = '%s::%s' % (typ.tag, name) try: return gdb.lookup_type(search) except RuntimeError: pass # The type was not found, so try the superclass. We only need # to check the first superclass, so we don't bother with # anything fancier here. fields = typ.fields() if len(fields) and fields[0].is_base_class: typ = fields[0].type else: raise ValueError("Cannot find type %s::%s" % (str(orig), name)) _versioned_namespace = '__8::' def lookup_templ_spec(templ, *args): """ Lookup template specialization templ<args...>. """ t = '{}<{}>'.format(templ, ', '.join([str(a) for a in args])) try: return gdb.lookup_type(t) except gdb.error as e: # Type not found, try again in versioned namespace. global _versioned_namespace if _versioned_namespace not in templ: t = t.replace('::', '::' + _versioned_namespace, 1) try: return gdb.lookup_type(t) except gdb.error: # If that also fails, rethrow the original exception pass raise e # Use this to find container node types instead of find_type, # see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91997 for details. def lookup_node_type(nodename, containertype): """ Lookup specialization of template nodename corresponding to containertype. nodename - The name of a class template, as a String containertype - The container, as a gdb.Type Return a gdb.Type for the corresponding specialization of nodename, or None if the type cannot be found. e.g. lookup_node_type('_List_node', gdb.lookup_type('std::list<int>')) will return a gdb.Type for the type std::_List_node<int>. """ # If nodename is unqualified, assume it's in namespace std. if '::' not in nodename: nodename = 'std::' + nodename # Use either containertype's value_type or its first template argument. try: valtype = find_type(containertype, 'value_type') except: valtype = containertype.template_argument(0) valtype = valtype.strip_typedefs() try: return lookup_templ_spec(nodename, valtype) except gdb.error: # For debug mode containers the node is in std::__cxx1998. if is_member_of_namespace(nodename, 'std'): if is_member_of_namespace(containertype, 'std::__cxx1998', 'std::__debug', '__gnu_debug'): nodename = nodename.replace('::', '::__cxx1998::', 1) try: return lookup_templ_spec(nodename, valtype) except gdb.error: pass return None def is_member_of_namespace(typ, *namespaces): """ Test whether a type is a member of one of the specified namespaces. The type can be specified as a string or a gdb.Type object. """ if isinstance(typ, gdb.Type): typ = str(typ) typ = strip_versioned_namespace(typ) for namespace in namespaces: if typ.startswith(namespace + '::'): return True return False 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. """ global _versioned_namespace if isinstance(x, gdb.Type): x = x.tag template_name = '(%s)?%s' % (_versioned_namespace, template_name) return re.match('^std::%s<.*>$' % template_name, x) is not None def strip_versioned_namespace(typename): global _versioned_namespace return typename.replace(_versioned_namespace, '') def strip_fundts_namespace(typ): """Remove "fundamentals_vN" inline namespace from qualified type name.""" pattern = r'^std::experimental::fundamentals_v\d::' repl = 'std::experimental::' if sys.version_info[0] == 2: return re.sub(pattern, repl, typ, 1) else: # Technically this needs Python 3.1 but nobody should be using 3.0 return re.sub(pattern, repl, typ, count=1) def strip_inline_namespaces(type_str): """Remove known inline namespaces from the canonical name of a type.""" type_str = strip_versioned_namespace(type_str) type_str = type_str.replace('std::__cxx11::', 'std::') expt_ns = 'std::experimental::' for lfts_ns in ('fundamentals_v1', 'fundamentals_v2'): type_str = type_str.replace(expt_ns + lfts_ns + '::', expt_ns) fs_ns = expt_ns + 'filesystem::' type_str = type_str.replace(fs_ns + 'v1::', fs_ns) return type_str def get_template_arg_list(type_obj): """Return a type's template arguments as a list.""" n = 0 template_args = [] while True: try: template_args.append(type_obj.template_argument(n)) except: return template_args n += 1 class SmartPtrIterator(Iterator): """An iterator for smart pointer types with a single 'child' value.""" def __init__(self, val): self._val = val def __iter__(self): return self def __next__(self): if self._val is None: raise StopIteration self._val, val = None, self._val return ('get()', val) class SharedPointerPrinter(printer_base): """ Print a shared_ptr, weak_ptr, atomic<shared_ptr>, or atomic<weak_ptr>. """ def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val self._pointer = val['_M_ptr'] def children(self): return SmartPtrIterator(self._pointer) # Return the _Sp_counted_base<>* that holds the refcounts. def _get_refcounts(self): if self._typename == 'std::atomic': # A tagged pointer is stored as uintptr_t. ptr_val = self._val['_M_refcount']['_M_val']['_M_i'] ptr_val = ptr_val - (ptr_val % 2) # clear lock bit ptr_type = find_type(self._val['_M_refcount'].type, 'pointer') return ptr_val.cast(ptr_type) return self._val['_M_refcount']['_M_pi'] def to_string(self): state = 'empty' refcounts = self._get_refcounts() targ = self._val.type.template_argument(0) targ = strip_versioned_namespace(str(targ)) if refcounts != 0: usecount = refcounts['_M_use_count'] weakcount = refcounts['_M_weak_count'] if usecount == 0: state = 'expired, weak count %d' % weakcount else: state = 'use count %d, weak count %d' % ( usecount, weakcount - 1) return '%s<%s> (%s)' % (self._typename, targ, state) def _tuple_impl_get(val): """Return the tuple element stored in a _Tuple_impl<N, T> base class.""" bases = val.type.fields() if not bases[-1].is_base_class: raise ValueError( "Unsupported implementation for std::tuple: %s" % str(val.type)) # Get the _Head_base<N, T> base class: head_base = val.cast(bases[-1].type) fields = head_base.type.fields() if len(fields) == 0: raise ValueError( "Unsupported implementation for std::tuple: %s" % str(val.type)) if fields[0].name == '_M_head_impl': # The tuple element is the _Head_base::_M_head_impl data member. return head_base['_M_head_impl'] elif fields[0].is_base_class: # The tuple element is an empty base class of _Head_base. # Cast to that empty base class. return head_base.cast(fields[0].type) else: raise ValueError( "Unsupported implementation for std::tuple: %s" % str(val.type)) def tuple_get(n, val): """Return the result of std::get<n>(val) on a std::tuple.""" tuple_size = len(get_template_arg_list(val.type)) if n > tuple_size: raise ValueError("Out of range index for std::get<N> on std::tuple") # Get the first _Tuple_impl<0, T...> base class: node = val.cast(val.type.fields()[0].type) while n > 0: # Descend through the base classes until the Nth one. node = node.cast(node.type.fields()[0].type) n -= 1 return _tuple_impl_get(node) def unique_ptr_get(val): """Return the result of val.get() on a std::unique_ptr.""" # std::unique_ptr<T, D> contains a std::tuple<D::pointer, D>, # either as a direct data member _M_t (the old implementation) # or within a data member of type __uniq_ptr_data. impl_type = val.type.fields()[0].type.strip_typedefs() # Check for new implementations first: if is_specialization_of(impl_type, '__uniq_ptr_data') \ or is_specialization_of(impl_type, '__uniq_ptr_impl'): tuple_member = val['_M_t']['_M_t'] elif is_specialization_of(impl_type, 'tuple'): tuple_member = val['_M_t'] else: raise ValueError( "Unsupported implementation for unique_ptr: %s" % str(impl_type)) return tuple_get(0, tuple_member) class UniquePointerPrinter(printer_base): """Print a unique_ptr.""" def __init__(self, typename, val): self._val = val def children(self): return SmartPtrIterator(unique_ptr_get(self._val)) def to_string(self): t = self._val.type.template_argument(0) return 'std::unique_ptr<{}>'.format(str(t)) def get_value_from_aligned_membuf(buf, valtype): """Return the value held in a __gnu_cxx::__aligned_membuf.""" return buf['_M_storage'].address.cast(valtype.pointer()).dereference() def get_value_from_list_node(node): """Return the value held in an _List_node<_Val>.""" try: member = node.type.fields()[1].name if member == '_M_data': # C++03 implementation, node contains the value as a member return node['_M_data'] elif member == '_M_storage': # C++11 implementation, node stores value in __aligned_membuf valtype = node.type.template_argument(0) return get_value_from_aligned_membuf(node['_M_storage'], valtype) except: pass raise ValueError("Unsupported implementation for %s" % str(node.type)) class StdListPrinter(printer_base): """Print a std::list.""" class _iterator(Iterator): def __init__(self, nodetype, head): self._nodetype = nodetype self._base = head['_M_next'] self._head = head.address self._count = 0 def __iter__(self): return self def __next__(self): if self._base == self._head: raise StopIteration elt = self._base.cast(self._nodetype).dereference() self._base = elt['_M_next'] count = self._count self._count = self._count + 1 val = get_value_from_list_node(elt) return ('[%d]' % count, val) def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def children(self): nodetype = lookup_node_type('_List_node', self._val.type).pointer() return self._iterator(nodetype, self._val['_M_impl']['_M_node']) def to_string(self): headnode = self._val['_M_impl']['_M_node'] if headnode['_M_next'] == headnode.address: return 'empty %s' % (self._typename) return '%s' % (self._typename) class NodeIteratorPrinter(printer_base): def __init__(self, typename, val, contname, nodename): self._val = val self._typename = typename self._contname = contname self._nodetype = lookup_node_type(nodename, val.type) def to_string(self): if not self._val['_M_node']: return 'non-dereferenceable iterator for std::%s' % (self._contname) node = self._val['_M_node'].cast( self._nodetype.pointer()).dereference() return str(get_value_from_list_node(node)) class StdListIteratorPrinter(NodeIteratorPrinter): """Print std::list::iterator.""" def __init__(self, typename, val): NodeIteratorPrinter.__init__(self, typename, val, 'list', '_List_node') class StdFwdListIteratorPrinter(NodeIteratorPrinter): """Print std::forward_list::iterator.""" def __init__(self, typename, val): NodeIteratorPrinter.__init__(self, typename, val, 'forward_list', '_Fwd_list_node') class StdSlistPrinter(printer_base): """Print a __gnu_cxx::slist.""" class _iterator(Iterator): def __init__(self, nodetype, head): self._nodetype = nodetype self._base = head['_M_head']['_M_next'] self._count = 0 def __iter__(self): return self def __next__(self): if self._base == 0: raise StopIteration elt = self._base.cast(self._nodetype).dereference() self._base = elt['_M_next'] count = self._count self._count = self._count + 1 return ('[%d]' % count, elt['_M_data']) def __init__(self, typename, val): self._val = val def children(self): nodetype = lookup_node_type('__gnu_cxx::_Slist_node', self._val.type) return self._iterator(nodetype.pointer(), self._val) def to_string(self): if self._val['_M_head']['_M_next'] == 0: return 'empty __gnu_cxx::slist' return '__gnu_cxx::slist' class StdSlistIteratorPrinter(printer_base): """Print __gnu_cxx::slist::iterator.""" def __init__(self, typename, val): self._val = val def to_string(self): if not self._val['_M_node']: return 'non-dereferenceable iterator for __gnu_cxx::slist' nodetype = lookup_node_type( '__gnu_cxx::_Slist_node', self._val.type).pointer() return str(self._val['_M_node'].cast(nodetype).dereference()['_M_data']) class StdVectorPrinter(printer_base): """Print a std::vector.""" class _iterator(Iterator): def __init__(self, start, finish, bitvec): self._bitvec = bitvec if bitvec: self._item = start['_M_p'] self._so = 0 self._finish = finish['_M_p'] self._fo = finish['_M_offset'] itype = self._item.dereference().type self._isize = 8 * itype.sizeof else: self._item = start self._finish = finish self._count = 0 def __iter__(self): return self def __next__(self): count = self._count self._count = self._count + 1 if self._bitvec: if self._item == self._finish and self._so >= self._fo: raise StopIteration elt = bool(self._item.dereference() & (1 << self._so)) self._so = self._so + 1 if self._so >= self._isize: self._item = self._item + 1 self._so = 0 return ('[%d]' % count, elt) else: if self._item == self._finish: raise StopIteration elt = self._item.dereference() self._item = self._item + 1 return ('[%d]' % count, elt) def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val self._is_bool = val.type.template_argument( 0).code == gdb.TYPE_CODE_BOOL def children(self): return self._iterator(self._val['_M_impl']['_M_start'], self._val['_M_impl']['_M_finish'], self._is_bool) def to_string(self): start = self._val['_M_impl']['_M_start'] finish = self._val['_M_impl']['_M_finish'] end = self._val['_M_impl']['_M_end_of_storage'] if self._is_bool: start = self._val['_M_impl']['_M_start']['_M_p'] finish = self._val['_M_impl']['_M_finish']['_M_p'] fo = self._val['_M_impl']['_M_finish']['_M_offset'] itype = start.dereference().type bl = 8 * itype.sizeof length = bl * (finish - start) + fo capacity = bl * (end - start) return ('%s<bool> of length %d, capacity %d' % (self._typename, int(length), int(capacity))) else: return ('%s of length %d, capacity %d' % (self._typename, int(finish - start), int(end - start))) def display_hint(self): return 'array' class StdVectorIteratorPrinter(printer_base): """Print std::vector::iterator.""" def __init__(self, typename, val): self._val = val def to_string(self): if not self._val['_M_current']: return 'non-dereferenceable iterator for std::vector' return str(self._val['_M_current'].dereference()) class StdBitIteratorPrinter(printer_base): """Print std::vector<bool>'s _Bit_iterator and _Bit_const_iterator.""" def __init__(self, typename, val): self._val = val def to_string(self): if not self._val['_M_p']: return 'non-dereferenceable iterator for std::vector<bool>' return bool(self._val['_M_p'].dereference() & (1 << self._val['_M_offset'])) class StdBitReferencePrinter(printer_base): """Print std::vector<bool>::reference.""" def __init__(self, typename, val): self._val = val def to_string(self): if not self._val['_M_p']: # PR libstdc++/115098 removed the reference default constructor # that this case relates to. New code should never need this, # but we still handle it for compatibility with old binaries. return 'invalid std::vector<bool>::reference' return bool(self._val['_M_p'].dereference() & (self._val['_M_mask'])) class StdTuplePrinter(printer_base): """Print a std::tuple.""" class _iterator(Iterator): @staticmethod def _is_nonempty_tuple(nodes): if len(nodes) == 2: if is_specialization_of(nodes[1].type, '__tuple_base'): return True elif len(nodes) == 1: return True elif len(nodes) == 0: return False raise ValueError( "Top of tuple tree does not consist of a single node.") def __init__(self, head): self._head = head # Set the base class as the initial head of the # tuple. nodes = self._head.type.fields() if self._is_nonempty_tuple(nodes): # Set the actual head to the first pair. self._head = self._head.cast(nodes[0].type) self._count = 0 def __iter__(self): return self def __next__(self): # Check for further recursions in the inheritance tree. # For a GCC 5+ tuple self._head is None after visiting all nodes: if not self._head: raise StopIteration nodes = self._head.type.fields() # For a GCC 4.x tuple there is a final node with no fields: if len(nodes) == 0: raise StopIteration # Check that this iteration has an expected structure. if len(nodes) > 2: raise ValueError( "Cannot parse more than 2 nodes in a tuple tree.") if len(nodes) == 1: # This is the last node of a GCC 5+ std::tuple. impl = self._head.cast(nodes[0].type) self._head = None else: # Either a node before the last node, or the last node of # a GCC 4.x tuple (which has an empty parent). # - Left node is the next recursion parent. # - Right node is the actual class contained in the tuple. # Process right node. impl = self._head.cast(nodes[1].type) # Process left node and set it as head. self._head = self._head.cast(nodes[0].type) self._count = self._count + 1 # Finally, check the implementation. If it is # wrapped in _M_head_impl return that, otherwise return # the value "as is". fields = impl.type.fields() if len(fields) < 1 or fields[0].name != "_M_head_impl": return ('[%d]' % (self._count - 1), impl) else: return ('[%d]' % (self._count - 1), impl['_M_head_impl']) def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def children(self): return self._iterator(self._val) def to_string(self): if len(self._val.type.fields()) == 0: return 'empty %s' % (self._typename) return '%s containing' % (self._typename) class StdStackOrQueuePrinter(printer_base): """Print a std::stack or std::queue.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._visualizer = gdb.default_visualizer(val['c']) def children(self): return self._visualizer.children() def to_string(self): return '%s wrapping: %s' % (self._typename, self._visualizer.to_string()) def display_hint(self): if hasattr(self._visualizer, 'display_hint'): return self._visualizer.display_hint() return None class RbtreeIterator(Iterator): """ Turn an RB-tree-based container (std::map, std::set etc.) into a Python iterable object. """ def __init__(self, rbtree): self._size = rbtree['_M_t']['_M_impl']['_M_node_count'] self._node = rbtree['_M_t']['_M_impl']['_M_header']['_M_left'] self._count = 0 def __iter__(self): return self def __len__(self): return int(self._size) def __next__(self): if self._count == self._size: raise StopIteration result = self._node self._count = self._count + 1 if self._count < self._size: # Compute the next node. node = self._node if node.dereference()['_M_right']: node = node.dereference()['_M_right'] while node.dereference()['_M_left']: node = node.dereference()['_M_left'] else: parent = node.dereference()['_M_parent'] while node == parent.dereference()['_M_right']: node = parent parent = parent.dereference()['_M_parent'] if node.dereference()['_M_right'] != parent: node = parent self._node = node return result def get_value_from_Rb_tree_node(node): """Return the value held in an _Rb_tree_node<_Val>.""" try: member = node.type.fields()[1].name if member == '_M_value_field': # C++03 implementation, node contains the value as a member return node['_M_value_field'] elif member == '_M_storage': # C++11 implementation, node stores value in __aligned_membuf valtype = node.type.template_argument(0) return get_value_from_aligned_membuf(node['_M_storage'], valtype) except: pass raise ValueError("Unsupported implementation for %s" % str(node.type)) # This is a pretty printer for std::_Rb_tree_iterator (which is # std::map::iterator), and has nothing to do with the RbtreeIterator # class above. class StdRbtreeIteratorPrinter(printer_base): """Print std::map::iterator, std::set::iterator, etc.""" def __init__(self, typename, val): self._val = val nodetype = lookup_node_type('_Rb_tree_node', self._val.type) self._link_type = nodetype.pointer() def to_string(self): if not self._val['_M_node']: return 'non-dereferenceable iterator for associative container' node = self._val['_M_node'].cast(self._link_type).dereference() return str(get_value_from_Rb_tree_node(node)) class StdDebugIteratorPrinter(printer_base): """Print a debug enabled version of an iterator.""" def __init__(self, typename, val): self._val = val # Just strip away the encapsulating __gnu_debug::_Safe_iterator # and return the wrapped iterator value. def to_string(self): base_type = gdb.lookup_type('__gnu_debug::_Safe_iterator_base') itype = self._val.type.template_argument(0) safe_seq = self._val.cast(base_type)['_M_sequence'] if not safe_seq: return str(self._val.cast(itype)) if self._val['_M_version'] != safe_seq['_M_version']: return "invalid iterator" return str(self._val.cast(itype)) def num_elements(num): """Return either "1 element" or "N elements" depending on the argument.""" return '1 element' if num == 1 else '%d elements' % num class StdMapPrinter(printer_base): """Print a std::map or std::multimap.""" # Turn an RbtreeIterator into a pretty-print iterator. class _iter(Iterator): def __init__(self, rbiter, type): self._rbiter = rbiter self._count = 0 self._type = type def __iter__(self): return self def __next__(self): if self._count % 2 == 0: n = next(self._rbiter) n = n.cast(self._type).dereference() n = get_value_from_Rb_tree_node(n) self._pair = n item = n['first'] else: item = self._pair['second'] result = ('[%d]' % self._count, item) self._count = self._count + 1 return result def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): return '%s with %s' % (self._typename, num_elements(len(RbtreeIterator(self._val)))) def children(self): node = lookup_node_type('_Rb_tree_node', self._val.type).pointer() return self._iter(RbtreeIterator(self._val), node) def display_hint(self): return 'map' class StdSetPrinter(printer_base): """Print a std::set or std::multiset.""" # Turn an RbtreeIterator into a pretty-print iterator. class _iter(Iterator): def __init__(self, rbiter, type): self._rbiter = rbiter self._count = 0 self._type = type def __iter__(self): return self def __next__(self): item = next(self._rbiter) item = item.cast(self._type).dereference() item = get_value_from_Rb_tree_node(item) # FIXME: this is weird ... what to do? # Maybe a 'set' display hint? result = ('[%d]' % self._count, item) self._count = self._count + 1 return result def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): return '%s with %s' % (self._typename, num_elements(len(RbtreeIterator(self._val)))) def children(self): node = lookup_node_type('_Rb_tree_node', self._val.type).pointer() return self._iter(RbtreeIterator(self._val), node) class StdBitsetPrinter(printer_base): """Print a std::bitset.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): # If template_argument handled values, we could print the # size. Or we could use a regexp on the type. return '%s' % (self._typename) def children(self): try: # An empty bitset may not have any members which will # result in an exception being thrown. words = self._val['_M_w'] except: return [] wtype = words.type # The _M_w member can be either an unsigned long, or an # array. This depends on the template specialization used. # If it is a single long, convert to a single element list. if wtype.code == gdb.TYPE_CODE_ARRAY: tsize = wtype.target().sizeof else: words = [words] tsize = wtype.sizeof nwords = wtype.sizeof / tsize result = [] byte = 0 while byte < nwords: w = words[byte] bit = 0 while w != 0: if (w & 1) != 0: # Another spot where we could use 'set'? result.append(('[%d]' % (byte * tsize * 8 + bit), 1)) bit = bit + 1 w = w >> 1 byte = byte + 1 return result class StdDequePrinter(printer_base): """Print a std::deque.""" class _iter(Iterator): def __init__(self, node, start, end, last, buffer_size): self._node = node self._p = start self._end = end self._last = last self._buffer_size = buffer_size self._count = 0 def __iter__(self): return self def __next__(self): if self._p == self._last: raise StopIteration result = ('[%d]' % self._count, self._p.dereference()) self._count = self._count + 1 # Advance the 'cur' pointer. self._p = self._p + 1 if self._p == self._end: # If we got to the end of this bucket, move to the # next bucket. self._node = self._node + 1 self._p = self._node[0] self._end = self._p + self._buffer_size return result def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val self._elttype = val.type.template_argument(0) size = self._elttype.sizeof if size < 512: self._buffer_size = int(512 / size) else: self._buffer_size = 1 def to_string(self): start = self._val['_M_impl']['_M_start'] end = self._val['_M_impl']['_M_finish'] delta_n = end['_M_node'] - start['_M_node'] - 1 delta_s = start['_M_last'] - start['_M_cur'] delta_e = end['_M_cur'] - end['_M_first'] size = self._buffer_size * delta_n + delta_s + delta_e return '%s with %s' % (self._typename, num_elements(long(size))) def children(self): start = self._val['_M_impl']['_M_start'] end = self._val['_M_impl']['_M_finish'] return self._iter(start['_M_node'], start['_M_cur'], start['_M_last'], end['_M_cur'], self._buffer_size) def display_hint(self): return 'array' class StdDequeIteratorPrinter(printer_base): """Print std::deque::iterator.""" def __init__(self, typename, val): self._val = val def to_string(self): if not self._val['_M_cur']: return 'non-dereferenceable iterator for std::deque' return str(self._val['_M_cur'].dereference()) class StdStringPrinter(printer_base): """Print a std::basic_string of some kind.""" def __init__(self, typename, val): self._val = val self._new_string = typename.find("::__cxx11::basic_string") != -1 def to_string(self): # Make sure &string works, too. type = self._val.type if type.code == gdb.TYPE_CODE_REF: type = type.target() # Calculate the length of the string so that to_string returns # the string according to length, not according to first null # encountered. ptr = self._val['_M_dataplus']['_M_p'] if self._new_string: length = self._val['_M_string_length'] # https://sourceware.org/bugzilla/show_bug.cgi?id=17728 ptr = ptr.cast(ptr.type.strip_typedefs()) else: realtype = type.unqualified().strip_typedefs() reptype = gdb.lookup_type(str(realtype) + '::_Rep').pointer() header = ptr.cast(reptype) - 1 length = header.dereference()['_M_length'] if hasattr(ptr, "lazy_string"): return ptr.lazy_string(length=length) return ptr.string(length=length) def display_hint(self): return 'string' def access_streambuf_ptrs(streambuf): """Access the streambuf put area pointers.""" pbase = streambuf['_M_out_beg'] pptr = streambuf['_M_out_cur'] egptr = streambuf['_M_in_end'] return pbase, pptr, egptr class StdStringBufPrinter(printer_base): """Print a std::basic_stringbuf.""" def __init__(self, _, val): self._val = val def to_string(self): (pbase, pptr, egptr) = access_streambuf_ptrs(self._val) # Logic from basic_stringbuf::_M_high_mark() if pptr: if not egptr or pptr > egptr: return pbase.string(length=pptr - pbase) else: return pbase.string(length=egptr - pbase) return self._val['_M_string'] def display_hint(self): return 'string' class StdStringStreamPrinter(printer_base): """Print a std::basic_stringstream.""" def __init__(self, typename, val): self._val = val self._typename = typename # Check if the stream was redirected. This is essentially: # val['_M_streambuf'] != val['_M_stringbuf'].address # However, GDB can't resolve the virtual inheritance, so we do that # manually. basetype = [f.type for f in val.type.fields() if f.is_base_class][0] gdb.set_convenience_variable('__stream', val.cast(basetype).address) self._streambuf = gdb.parse_and_eval('$__stream->rdbuf()') self._was_redirected = self._streambuf != val['_M_stringbuf'].address def to_string(self): if self._was_redirected: return "%s redirected to %s" % ( self._typename, self._streambuf.dereference()) return self._val['_M_stringbuf'] def display_hint(self): if self._was_redirected: return None return 'string' class Tr1HashtableIterator(Iterator): def __init__(self, hashtable): self._buckets = hashtable['_M_buckets'] self._bucket = 0 self._bucket_count = hashtable['_M_bucket_count'] self._node_type = find_type(hashtable.type, '_Node').pointer() self._node = 0 while self._bucket != self._bucket_count: self._node = self._buckets[self._bucket] if self._node: break self._bucket = self._bucket + 1 def __iter__(self): return self def __next__(self): if self._node == 0: raise StopIteration node = self._node.cast(self._node_type) result = node.dereference()['_M_v'] self._node = node.dereference()['_M_next'] if self._node == 0: self._bucket = self._bucket + 1 while self._bucket != self._bucket_count: self._node = self._buckets[self._bucket] if self._node: break self._bucket = self._bucket + 1 return result class StdHashtableIterator(Iterator): def __init__(self, hashtable): self._node = hashtable['_M_before_begin']['_M_nxt'] valtype = hashtable.type.template_argument(1) cached = hashtable.type.template_argument(9).template_argument(0) node_type = lookup_templ_spec('std::__detail::_Hash_node', str(valtype), 'true' if cached else 'false') self._node_type = node_type.pointer() def __iter__(self): return self def __next__(self): if self._node == 0: raise StopIteration elt = self._node.cast(self._node_type).dereference() self._node = elt['_M_nxt'] valptr = elt['_M_storage'].address valptr = valptr.cast(elt.type.template_argument(0).pointer()) return valptr.dereference() class Tr1UnorderedSetPrinter(printer_base): """Print a std::unordered_set or tr1::unordered_set.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def _hashtable(self): if self._typename.startswith('std::tr1'): return self._val return self._val['_M_h'] def to_string(self): count = self._hashtable()['_M_element_count'] return '%s with %s' % (self._typename, num_elements(count)) @staticmethod def _format_count(i): return '[%d]' % i def children(self): counter = imap(self._format_count, itertools.count()) if self._typename.startswith('std::tr1'): return izip(counter, Tr1HashtableIterator(self._hashtable())) return izip(counter, StdHashtableIterator(self._hashtable())) class Tr1UnorderedMapPrinter(printer_base): """Print a std::unordered_map or tr1::unordered_map.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def _hashtable(self): if self._typename.startswith('std::tr1'): return self._val return self._val['_M_h'] def to_string(self): count = self._hashtable()['_M_element_count'] return '%s with %s' % (self._typename, num_elements(count)) @staticmethod def _flatten(list): for elt in list: for i in elt: yield i @staticmethod def _format_one(elt): return (elt['first'], elt['second']) @staticmethod def _format_count(i): return '[%d]' % i def children(self): counter = imap(self._format_count, itertools.count()) # Map over the hash table and flatten the result. if self._typename.startswith('std::tr1'): data = self._flatten( imap(self._format_one, Tr1HashtableIterator(self._hashtable()))) # Zip the two iterators together. return izip(counter, data) data = self._flatten( imap(self._format_one, StdHashtableIterator(self._hashtable()))) # Zip the two iterators together. return izip(counter, data) def display_hint(self): return 'map' class StdForwardListPrinter(printer_base): """Print a std::forward_list.""" class _iterator(Iterator): def __init__(self, nodetype, head): self._nodetype = nodetype self._base = head['_M_next'] self._count = 0 def __iter__(self): return self def __next__(self): if self._base == 0: raise StopIteration elt = self._base.cast(self._nodetype).dereference() self._base = elt['_M_next'] count = self._count self._count = self._count + 1 valptr = elt['_M_storage'].address valptr = valptr.cast(elt.type.template_argument(0).pointer()) return ('[%d]' % count, valptr.dereference()) def __init__(self, typename, val): self._val = val self._typename = strip_versioned_namespace(typename) def children(self): nodetype = lookup_node_type('_Fwd_list_node', self._val.type).pointer() return self._iterator(nodetype, self._val['_M_impl']['_M_head']) def to_string(self): if self._val['_M_impl']['_M_head']['_M_next'] == 0: return 'empty %s' % self._typename return '%s' % self._typename class SingleObjContainerPrinter(printer_base): """Base class for printers of containers of single objects.""" def __init__(self, val, viz, hint=None): self._contained_value = val self._visualizer = viz self._hint = hint def _recognize(self, type): """Return type as a string after applying type printers.""" global _use_type_printing if not _use_type_printing: return str(type) return gdb.types.apply_type_recognizers(gdb.types.get_type_recognizers(), type) or str(type) class _contained(Iterator): def __init__(self, val): self._val = val def __iter__(self): return self def __next__(self): if self._val is None: raise StopIteration retval = self._val self._val = None return ('[contained value]', retval) def children(self): if self._contained_value is None: return self._contained(None) if hasattr(self._visualizer, 'children'): return self._visualizer.children() return self._contained(self._contained_value) def display_hint(self): if (hasattr(self._visualizer, 'children') and hasattr(self._visualizer, 'display_hint')): # If contained value is a map we want to display in the same way. return self._visualizer.display_hint() return self._hint def function_pointer_to_name(f): """Find the name of the function referred to by the gdb.Value f, which should contain a function pointer from the program.""" # Turn the function pointer into an actual address. # This is needed to unpack ppc64 function descriptors. f = f.dereference().address if sys.version_info[0] == 2: # Older versions of GDB need to use long for Python 2, # because int(f) on 64-bit big-endian values raises a # gdb.error saying "Cannot convert value to int." f = long(f) else: f = int(f) try: # If the function can't be found older versions of GDB raise a # RuntimeError saying "Cannot locate object file for block." return gdb.block_for_pc(f).function.name except: return None class StdExpAnyPrinter(SingleObjContainerPrinter): """Print a std::any or std::experimental::any.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._typename = strip_fundts_namespace(self._typename) self._val = val self._contained_type = None contained_value = None visualizer = None mgr = self._val['_M_manager'] if mgr != 0: func = function_pointer_to_name(mgr) if not func: raise ValueError( "Invalid function pointer in %s" % (self._typename)) # We want to use this regular expression: # T::_Manager_xxx<.*>::_S_manage\(T::_Op, const T\*, T::_Arg\*\) # where T is std::any or std::experimental::any. # But we need to account for variances in demangled names # between GDB versions, e.g. 'enum T::_Op' instead of 'T::_Op'. rx = ( r"({0}::_Manager_\w+<.*>)::_S_manage\(" r"(enum )?{0}::_Op, (const {0}|{0} const) ?\*, " r"(union )?{0}::_Arg ?\*\)" ).format(typename) m = re.match(rx, func) if not m: raise ValueError( "Unknown manager function in %s" % self._typename) mgrname = m.group(1) # FIXME need to expand 'std::string' so that gdb.lookup_type works if 'std::string' in mgrname: mgrtypes = [] for s in StdExpAnyPrinter._string_types(): try: x = re.sub(r"std::string(?!\w)", s, m.group(1)) # The following lookup might raise gdb.error if the # manager function was never instantiated for 's' in # the program, because there will be no such type. mgrtypes.append(gdb.lookup_type(x)) except gdb.error: pass if len(mgrtypes) != 1: # FIXME: this is unlikely in practice, but possible for # programs that use both old and new string types with # std::any in a single program. Can we do better? # Maybe find the address of each type's _S_manage and # compare to the address stored in _M_manager? raise ValueError( 'Cannot uniquely determine std::string type ' 'used in std::any' ) mgrtype = mgrtypes[0] else: mgrtype = gdb.lookup_type(mgrname) self._contained_type = mgrtype.template_argument(0) valptr = None if '::_Manager_internal' in mgrname: valptr = self._val['_M_storage']['_M_buffer'].address elif '::_Manager_external' in mgrname: valptr = self._val['_M_storage']['_M_ptr'] else: raise ValueError( "Unknown manager function in %s" % self._typename) contained_value = valptr.cast( self._contained_type.pointer()).dereference() visualizer = gdb.default_visualizer(contained_value) super(StdExpAnyPrinter, self).__init__(contained_value, visualizer) def to_string(self): if self._contained_type is None: return '%s [no contained value]' % self._typename desc = "%s containing " % self._typename if hasattr(self._visualizer, 'children'): return desc + self._visualizer.to_string() valtype = self._recognize(self._contained_type) return desc + strip_versioned_namespace(str(valtype)) @staticmethod def _string_types(): # This lookup for std::string might return the __cxx11 version, # but that's not necessarily the one used by the std::any # manager function we're trying to find. strings = {str(gdb.lookup_type('std::string').strip_typedefs())} # So also consider all the other possible std::string types! s = 'basic_string<char, std::char_traits<char>, std::allocator<char> >' quals = ['std::', 'std::__cxx11::', 'std::' + _versioned_namespace] strings |= {q + s for q in quals} # set of unique strings return strings class StdExpOptionalPrinter(SingleObjContainerPrinter): """Print a std::optional or std::experimental::optional.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._typename = strip_fundts_namespace(self._typename) payload = val['_M_payload'] if self._typename.startswith('std::experimental'): engaged = val['_M_engaged'] contained_value = payload else: engaged = payload['_M_engaged'] contained_value = payload['_M_payload'] try: # Since GCC 9 contained_value = contained_value['_M_value'] except: pass visualizer = gdb.default_visualizer(contained_value) if not engaged: contained_value = None super(StdExpOptionalPrinter, self).__init__( contained_value, visualizer) def to_string(self): if self._contained_value is None: return "%s [no contained value]" % self._typename if hasattr(self._visualizer, 'children'): return "%s containing %s" % (self._typename, self._visualizer.to_string()) return self._typename class StdVariantPrinter(SingleObjContainerPrinter): """Print a std::variant.""" def __init__(self, typename, val): alternatives = get_template_arg_list(val.type) self._typename = strip_versioned_namespace(typename) self._index = val['_M_index'] if self._index >= len(alternatives): self._contained_type = None contained_value = None visualizer = None else: self._contained_type = alternatives[int(self._index)] addr = val['_M_u']['_M_first']['_M_storage'].address contained_value = addr.cast( self._contained_type.pointer()).dereference() visualizer = gdb.default_visualizer(contained_value) super(StdVariantPrinter, self).__init__( contained_value, visualizer, 'array') def to_string(self): if self._contained_value is None: return "%s [no contained value]" % self._typename if hasattr(self._visualizer, 'children'): return "%s [index %d] containing %s" % (self._typename, self._index, self._visualizer.to_string()) return "%s [index %d]" % (self._typename, self._index) class StdNodeHandlePrinter(SingleObjContainerPrinter): """Print a container node handle.""" def __init__(self, typename, val): self._value_type = val.type.template_argument(1) nodetype = val.type.template_argument(2).template_argument(0) self._is_rb_tree_node = is_specialization_of( nodetype.name, '_Rb_tree_node') self._is_map_node = val.type.template_argument(0) != self._value_type nodeptr = val['_M_ptr'] if nodeptr: if self._is_rb_tree_node: contained_value = get_value_from_Rb_tree_node( nodeptr.dereference()) else: contained_value = get_value_from_aligned_membuf(nodeptr['_M_storage'], self._value_type) visualizer = gdb.default_visualizer(contained_value) else: contained_value = None visualizer = None optalloc = val['_M_alloc'] self._alloc = optalloc['_M_payload'] if optalloc['_M_engaged'] else None super(StdNodeHandlePrinter, self).__init__(contained_value, visualizer, 'array') def to_string(self): desc = 'node handle for ' if not self._is_rb_tree_node: desc += 'unordered ' if self._is_map_node: desc += 'map' else: desc += 'set' if self._contained_value: desc += ' with element' if hasattr(self._visualizer, 'children'): return "%s = %s" % (desc, self._visualizer.to_string()) return desc else: return 'empty %s' % desc class StdExpStringViewPrinter(printer_base): """ Print a std::basic_string_view or std::experimental::basic_string_view """ def __init__(self, typename, val): self._val = val def to_string(self): ptr = self._val['_M_str'] len = self._val['_M_len'] if hasattr(ptr, "lazy_string"): return ptr.lazy_string(length=len) return ptr.string(length=len) def display_hint(self): return 'string' class StdExpPathPrinter(printer_base): """Print a std::experimental::filesystem::path.""" def __init__(self, typename, val): self._val = val self._typename = typename start = self._val['_M_cmpts']['_M_impl']['_M_start'] finish = self._val['_M_cmpts']['_M_impl']['_M_finish'] self._num_cmpts = int(finish - start) def _path_type(self): t = str(self._val['_M_type']) if t[-9:] == '_Root_dir': return "root-directory" if t[-10:] == '_Root_name': return "root-name" return None def to_string(self): path = "%s" % self._val['_M_pathname'] if self._num_cmpts == 0: t = self._path_type() if t: path = '%s [%s]' % (path, t) return "experimental::filesystem::path %s" % path class _iterator(Iterator): def __init__(self, cmpts, pathtype): self._pathtype = pathtype self._item = cmpts['_M_impl']['_M_start'] self._finish = cmpts['_M_impl']['_M_finish'] self._count = 0 def __iter__(self): return self def __next__(self): if self._item == self._finish: raise StopIteration item = self._item.dereference() count = self._count self._count = self._count + 1 self._item = self._item + 1 path = item['_M_pathname'] t = StdExpPathPrinter(self._pathtype, item)._path_type() if not t: t = count return ('[%s]' % t, path) def children(self): return self._iterator(self._val['_M_cmpts'], self._typename) class StdPathPrinter(printer_base): """Print a std::filesystem::path.""" def __init__(self, typename, val): self._val = val self._typename = typename impl = unique_ptr_get(self._val['_M_cmpts']['_M_impl']) self._type = impl.cast(gdb.lookup_type('uintptr_t')) & 3 if self._type == 0: self._impl = impl else: self._impl = None def _path_type(self): t = str(self._type.cast(gdb.lookup_type(self._typename + '::_Type'))) if t[-9:] == '_Root_dir': return "root-directory" if t[-10:] == '_Root_name': return "root-name" return None def to_string(self): path = "%s" % self._val['_M_pathname'] if self._type != 0: t = self._path_type() if t: path = '%s [%s]' % (path, t) return "filesystem::path %s" % path class _iterator(Iterator): def __init__(self, impl, pathtype): self._pathtype = pathtype if impl: # We can't access _Impl::_M_size because _Impl is incomplete # so cast to int* to access the _M_size member at offset zero, int_type = gdb.lookup_type('int') cmpt_type = gdb.lookup_type(pathtype + '::_Cmpt') char_type = gdb.lookup_type('char') impl = impl.cast(int_type.pointer()) size = impl.dereference() #self._capacity = (impl + 1).dereference() if hasattr(gdb.Type, 'alignof'): sizeof_Impl = max(2 * int_type.sizeof, cmpt_type.alignof) else: sizeof_Impl = 2 * int_type.sizeof begin = impl.cast(char_type.pointer()) + sizeof_Impl self._item = begin.cast(cmpt_type.pointer()) self._finish = self._item + size self._count = 0 else: self._item = None self._finish = None def __iter__(self): return self def __next__(self): if self._item == self._finish: raise StopIteration item = self._item.dereference() count = self._count self._count = self._count + 1 self._item = self._item + 1 path = item['_M_pathname'] t = StdPathPrinter(self._pathtype, item)._path_type() if not t: t = count return ('[%s]' % t, path) def children(self): return self._iterator(self._impl, self._typename) class StdPairPrinter(printer_base): """Print a std::pair object, with 'first' and 'second' as children.""" def __init__(self, typename, val): self._val = val class _iter(Iterator): """An iterator for std::pair types. Returns 'first' then 'second'.""" def __init__(self, val): self._val = val self._which = 'first' def __iter__(self): return self def __next__(self): if self._which is None: raise StopIteration which = self._which if which == 'first': self._which = 'second' else: self._which = None return (which, self._val[which]) def children(self): return self._iter(self._val) def to_string(self): return None class StdCmpCatPrinter(printer_base): """Print a comparison category object.""" def __init__(self, typename, val): self._typename = typename[typename.rfind(':') + 1:] self._val = val['_M_value'] def to_string(self): if self._typename == 'strong_ordering' and self._val == 0: name = 'equal' else: names = {2: 'unordered', -1: 'less', 0: 'equivalent', 1: 'greater'} name = names[int(self._val)] return 'std::{}::{}'.format(self._typename, name) class StdErrorCodePrinter(printer_base): """Print a std::error_code or std::error_condition.""" _system_is_posix = None # Whether std::system_category() use errno values. def __init__(self, typename, val): self._val = val self._typename = strip_versioned_namespace(typename) # Do this only once ... if StdErrorCodePrinter._system_is_posix is None: try: import posix StdErrorCodePrinter._system_is_posix = True except ImportError: StdErrorCodePrinter._system_is_posix = False @staticmethod def _find_errc_enum(name): typ = gdb.lookup_type(name) if typ is not None and typ.code == gdb.TYPE_CODE_ENUM: return typ return None @classmethod def _find_standard_errc_enum(cls, name): for ns in ['', _versioned_namespace]: try: qname = 'std::{}{}'.format(ns, name) return cls._find_errc_enum(qname) except RuntimeError: pass @classmethod def _match_net_ts_category(cls, cat): net_cats = ['stream', 'socket', 'ip::resolver'] for c in net_cats: func = c + '_category()' for ns in ['', _versioned_namespace]: ns = 'std::{}experimental::net::v1'.format(ns) sym = gdb.lookup_symbol('{}::{}::__c'.format(ns, func))[0] if sym is not None: if cat == sym.value().address: name = 'net::' + func enum = cls._find_errc_enum('{}::{}_errc'.format(ns, c)) return (name, enum) return (None, None) @classmethod def _category_info(cls, cat): """Return details of a std::error_category.""" name = None enum = None is_errno = False # Try these first, or we get "warning: RTTI symbol not found" when # using cat.dynamic_type on the local class types for Net TS # categories. func, enum = cls._match_net_ts_category(cat) if func is not None: return (None, func, enum, is_errno) # This might give a warning for a program-defined category defined as # a local class, but there doesn't seem to be any way to avoid that. typ = cat.dynamic_type.target() # Shortcuts for the known categories defined by libstdc++. if typ.tag.endswith('::generic_error_category'): name = 'generic' is_errno = True if typ.tag.endswith('::system_error_category'): name = 'system' is_errno = cls._system_is_posix if typ.tag.endswith('::future_error_category'): name = 'future' enum = cls._find_standard_errc_enum('future_errc') if typ.tag.endswith('::io_error_category'): name = 'io' enum = cls._find_standard_errc_enum('io_errc') if name is None: try: # Want to call std::error_category::name() override, but it's # unsafe: https://sourceware.org/bugzilla/show_bug.cgi?id=28856 # gdb.set_convenience_variable('__cat', cat) # return '"%s"' % gdb.parse_and_eval('$__cat->name()').string() pass except: pass return (name, typ.tag, enum, is_errno) @staticmethod def _unqualified_name(name): """ Strip any nested-name-specifier from name to give an unqualified name. """ return name.split('::')[-1] def to_string(self): value = self._val['_M_value'] cat = self._val['_M_cat'] name, alt_name, enum, is_errno = self._category_info(cat) if value == 0: default_cats = {'error_code': 'system', 'error_condition': 'generic'} if name == default_cats[self._unqualified_name(self._typename)]: return self._typename + ' = { }' # default-constructed value strval = str(value) if is_errno and value != 0: try: strval = errno.errorcode[int(value)] except: pass elif enum is not None: strval = self._unqualified_name(str(value.cast(enum))) if name is not None: name = '"%s"' % name else: name = alt_name return '%s = {%s: %s}' % (self._typename, name, strval) class StdRegexStatePrinter(printer_base): """Print a state node in the NFA for a std::regex.""" def __init__(self, typename, val): self._val = val self._typename = typename def to_string(self): opcode = str(self._val['_M_opcode']) if opcode: opcode = opcode[25:] next_id = self._val['_M_next'] variants = {'repeat': 'alt', 'alternative': 'alt', 'subexpr_begin': 'subexpr', 'subexpr_end': 'subexpr', 'line_begin_assertion': None, 'line_end_assertion': None, 'word_boundary': 'neg', 'subexpr_lookahead': 'neg', 'backref': 'backref_index', 'match': None, 'accept': None, 'dummy': None, 'unknown': None } v = variants[opcode] s = "opcode={}, next={}".format(opcode, next_id) if v is not None and self._val['_M_' + v] is not None: s = "{}, {}={}".format(s, v, self._val['_M_' + v]) return "{%s}" % (s) class StdSpanPrinter(printer_base): """Print a std::span.""" class _iterator(Iterator): def __init__(self, begin, size): self._count = 0 self._begin = begin self._size = size def __iter__(self): return self def __next__(self): if self._count == self._size: raise StopIteration count = self._count self._count = self._count + 1 return '[%d]' % count, (self._begin + count).dereference() def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val size_max = gdb.parse_and_eval('static_cast<std::size_t>(-1)') if val.type.template_argument(1) == size_max: self._size = val['_M_extent']['_M_extent_value'] else: self._size = val.type.template_argument(1) def to_string(self): return '%s of length %d' % (self._typename, self._size) def children(self): return self._iterator(self._val['_M_ptr'], self._size) def display_hint(self): return 'array' class StdInitializerListPrinter(printer_base): """Print a std::initializer_list.""" def __init__(self, typename, val): self._typename = typename self._val = val self._size = val['_M_len'] def to_string(self): return '%s of length %d' % (self._typename, self._size) def children(self): return StdSpanPrinter._iterator(self._val['_M_array'], self._size) def display_hint(self): return 'array' class StdAtomicPrinter(printer_base): """Print a std:atomic.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val self._shptr_printer = None self._value_type = self._val.type.template_argument(0) if self._value_type.tag is not None: typ = strip_versioned_namespace(self._value_type.tag) if (typ.startswith('std::shared_ptr<') or typ.startswith('std::weak_ptr<')): impl = val['_M_impl'] self._shptr_printer = SharedPointerPrinter(typename, impl) self.children = self._shptr_children def _shptr_children(self): return SmartPtrIterator(self._shptr_printer._pointer) def to_string(self): if self._shptr_printer is not None: return self._shptr_printer.to_string() if self._value_type.code == gdb.TYPE_CODE_INT: val = self._val['_M_i'] elif self._value_type.code == gdb.TYPE_CODE_FLT: val = self._val['_M_fp'] elif self._value_type.code == gdb.TYPE_CODE_PTR: val = self._val['_M_b']['_M_p'] elif self._value_type.code == gdb.TYPE_CODE_BOOL: val = self._val['_M_base']['_M_i'] else: val = self._val['_M_i'] return '%s<%s> = { %s }' % (self._typename, str(self._value_type), val) class StdFormatArgsPrinter(printer_base): """Print a std::basic_format_args.""" # TODO: add printer for basic_format_arg<Context> and print out children. # TODO: add printer for __format::_ArgStore<Context, Args...>. def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): targs = get_template_arg_list(self._val.type) char_type = get_template_arg_list(targs[0])[1] if char_type == gdb.lookup_type('char'): typ = 'std::format_args' elif char_type == gdb.lookup_type('wchar_t'): typ = 'std::wformat_args' else: typ = 'std::basic_format_args' size = self._val['_M_packed_size'] if size == 1: return "%s with 1 argument" % (typ) if size == 0: size = self._val['_M_unpacked_size'] return "%s with %d arguments" % (typ, size) class StdChronoDurationPrinter(printer_base): """Print a std::chrono::duration.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def _ratio(self): # TODO use reduced period i.e. duration::period period = self._val.type.template_argument(1) num = period.template_argument(0) den = period.template_argument(1) return (num, den) def _suffix(self): num, den = self._ratio() if num == 1: if den == 1: return 's' if den == 1000: return 'ms' if den == 1000000: return 'us' if den == 1000000000: return 'ns' elif den == 1: if num == 60: return 'min' if num == 3600: return 'h' if num == 86400: return 'd' return '[{}]s'.format(num) return "[{}/{}]s".format(num, den) def to_string(self): r = self._val['__r'] if r.type.strip_typedefs().code == gdb.TYPE_CODE_FLT: r = "%g" % r return "std::chrono::duration = {{ {}{} }}".format(r, self._suffix()) class StdChronoTimePointPrinter(printer_base): """Print a std::chrono::time_point.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def _clock(self): clock = self._val.type.template_argument(0) name = strip_versioned_namespace(clock.name) if name == 'std::chrono::_V2::system_clock' \ or name == 'std::chrono::system_clock': return ('std::chrono::sys_time', 0) # XXX need to remove leap seconds from utc, gps, and tai if name == 'std::chrono::utc_clock': return ('std::chrono::utc_time', None) # XXX if name == 'std::chrono::gps_clock': return ('std::chrono::gps_time', None) # XXX 315964809 if name == 'std::chrono::tai_clock': return ('std::chrono::tai_time', None) # XXX -378691210 if name == 'std::filesystem::__file_clock': return ('std::chrono::file_time', 6437664000) if name == 'std::chrono::local_t': return ('std::chrono::local_time', 0) return ('{} time_point'.format(name), None) def to_string(self, abbrev=False): clock, offset = self._clock() d = self._val['__d'] r = d['__r'] printer = StdChronoDurationPrinter(d.type.name, d) suffix = printer._suffix() time = '' if offset is not None: num, den = printer._ratio() secs = (r * num / den) + offset try: dt = datetime.datetime.fromtimestamp(secs, _utc_timezone) time = ' [{:%Y-%m-%d %H:%M:%S}]'.format(dt) except: pass s = '%d%s%s' % (r, suffix, time) if abbrev: return s return '%s = { %s }' % (clock, s) class StdChronoZonedTimePrinter(printer_base): """Print a std::chrono::zoned_time.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): zone = self._val['_M_zone'].dereference()['_M_name'] time = self._val['_M_tp'] printer = StdChronoTimePointPrinter(time.type.name, time) time = printer.to_string(True) return 'std::chrono::zoned_time = {{ {} {} }}'.format(zone, time) months = [None, 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] weekdays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'] class StdChronoCalendarPrinter(printer_base): """Print a std::chrono::day, std::chrono::month, std::chrono::year etc.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): val = self._val typ = self._typename if 'month' in typ and typ != 'std::chrono::year_month_day_last': m = val['_M_m'] if typ.startswith('std::chrono::year'): y = val['_M_y'] if typ == 'std::chrono::day': return '{}'.format(int(val['_M_d'])) if typ == 'std::chrono::month': if m < 1 or m >= len(months): return "%d is not a valid month" % m return months[m] if typ == 'std::chrono::year': return '{}y'.format(y) if typ == 'std::chrono::weekday': wd = val['_M_wd'] if wd < 0 or wd >= len(weekdays): return "%d is not a valid weekday" % wd return '{}'.format(weekdays[wd]) if typ == 'std::chrono::weekday_indexed': return '{}[{}]'.format(val['_M_wd'], int(val['_M_index'])) if typ == 'std::chrono::weekday_last': return '{}[last]'.format(val['_M_wd']) if typ == 'std::chrono::month_day': return '{}/{}'.format(m, val['_M_d']) if typ == 'std::chrono::month_day_last': return '{}/last'.format(m) if typ == 'std::chrono::month_weekday': return '{}/{}'.format(m, val['_M_wdi']) if typ == 'std::chrono::month_weekday_last': return '{}/{}'.format(m, val['_M_wdl']) if typ == 'std::chrono::year_month': return '{}/{}'.format(y, m) if typ == 'std::chrono::year_month_day': return '{}/{}/{}'.format(y, m, val['_M_d']) if typ == 'std::chrono::year_month_day_last': return '{}/{}'.format(y, val['_M_mdl']) if typ == 'std::chrono::year_month_weekday': return '{}/{}/{}'.format(y, m, val['_M_wdi']) if typ == 'std::chrono::year_month_weekday_last': return '{}/{}/{}'.format(y, m, val['_M_wdl']) if typ.startswith('std::chrono::hh_mm_ss'): fract = '' if val['fractional_width'] != 0: fract = '.{:0{}d}'.format(int(val['_M_ss']['_M_r']), int(val['fractional_width'])) h = int(val['_M_h']['__r']) m = int(val['_M_m']['__r']) s = int(val['_M_s']['__r']) if val['_M_is_neg']: h = -h return '{:02}:{:02}:{:02}{}'.format(h, m, s, fract) class StdChronoTimeZonePrinter(printer_base): """Print a chrono::time_zone or chrono::time_zone_link.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): str = '%s = %s' % (self._typename, self._val['_M_name']) if self._typename.endswith("_link"): str += ' -> %s' % (self._val['_M_target']) return str class StdChronoLeapSecondPrinter(printer_base): """Print a chrono::leap_second.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): date = self._val['_M_s']['__r'] neg = '+-'[date < 0] return '%s %d (%c)' % (self._typename, abs(date), neg) class StdChronoTzdbPrinter(printer_base): """Print a chrono::tzdb.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): return '%s %s' % (self._typename, self._val['version']) class StdChronoTimeZoneRulePrinter(printer_base): """Print a chrono::time_zone rule.""" def __init__(self, typename, val): self._typename = strip_versioned_namespace(typename) self._val = val def to_string(self): on = self._val['on'] kind = on['kind'] month = months[on['month']] suffixes = {1: 'st', 2: 'nd', 3: 'rd', 21: 'st', 22: 'nd', 23: 'rd', 31: 'st'} day = on['day_of_month'] ordinal_day = '{}{}'.format(day, suffixes.get(day, 'th')) if kind == 0: # DayOfMonth start = '{} {}'.format(month, ordinal_day) else: weekday = weekdays[on['day_of_week']] if kind == 1: # LastWeekDay start = 'last {} in {}'.format(weekday, month) else: if kind == 2: # LessEq direction = ('last', '<=') else: direction = ('first', '>=') day = on['day_of_month'] start = '{} {} {} {} {}'.format(direction[0], weekday, direction[1], month, ordinal_day) return 'time_zone rule {} from {} to {} starting on {}'.format( self._val['name'], self._val['from'], self._val['to'], start) class StdLocalePrinter(printer_base): """Print a std::locale.""" def __init__(self, typename, val): self._val = val self._typename = typename def to_string(self): names = self._val['_M_impl']['_M_names'] mod = '' if names[0] == 0: name = '*' else: cats = gdb.parse_and_eval(self._typename + '::_S_categories') ncat = gdb.parse_and_eval(self._typename + '::_S_categories_size') n = names[0].string() cat = cats[0].string() name = '{}={}'.format(cat, n) cat_names = {cat: n} i = 1 while i < ncat and names[i] != 0: n = names[i].string() cat = cats[i].string() name = '{};{}={}'.format(name, cat, n) cat_names[cat] = n i = i + 1 uniq_names = set(cat_names.values()) if len(uniq_names) == 1: name = n elif len(uniq_names) == 2: n1, n2 = (uniq_names) name_list = list(cat_names.values()) other = None if name_list.count(n1) == 1: name = n2 other = n1 elif name_list.count(n2) == 1: name = n1 other = n2 if other is not None: cat = next(c for c, n in cat_names.items() if n == other) mod = ' with "{}={}"'.format(cat, other) return 'std::locale = "{}"{}'.format(name, mod) class StdIntegralConstantPrinter(printer_base): """Print a std::true_type or std::false_type.""" def __init__(self, typename, val): self._val = val self._typename = typename def to_string(self): value_type = self._val.type.template_argument(0) value = self._val.type.template_argument(1) if value_type.code == gdb.TYPE_CODE_BOOL: if value: return "std::true_type" else: return "std::false_type" typename = strip_versioned_namespace(self._typename) return "{}<{}, {}>".format(typename, value_type, value) class StdTextEncodingPrinter(printer_base): """Print a std::text_encoding.""" def __init__(self, typename, val): self._val = val self._typename = typename def to_string(self): rep = self._val['_M_rep'].dereference() if rep['_M_id'] == 1: return self._val['_M_name'] if rep['_M_id'] == 2: return 'unknown' return rep['_M_name'] # A "regular expression" printer which conforms to the # "SubPrettyPrinter" protocol from gdb.printing. class RxPrinter(object): def __init__(self, name, function): super(RxPrinter, self).__init__() self.name = name self._function = function self.enabled = True def invoke(self, value): if not self.enabled: return None if value.type.code == gdb.TYPE_CODE_REF: if hasattr(gdb.Value, "referenced_value"): value = value.referenced_value() return self._function(self.name, value) # A pretty-printer that conforms to the "PrettyPrinter" protocol from # gdb.printing. It can also be used directly as an old-style printer. class Printer(object): def __init__(self, name): super(Printer, self).__init__() self.name = name self._subprinters = [] self._lookup = {} self.enabled = True self._compiled_rx = re.compile('^([a-zA-Z0-9_:]+)(<.*>)?$') def add(self, name, function): # A small sanity check. # FIXME if not self._compiled_rx.match(name): raise ValueError( 'libstdc++ programming error: "%s" does not match' % name) printer = RxPrinter(name, function) self._subprinters.append(printer) self._lookup[name] = printer # Add a name using _GLIBCXX_BEGIN_NAMESPACE_VERSION. def add_version(self, base, name, function): self.add(base + name, function) if '__cxx11' not in base: vbase = re.sub('^(std|__gnu_cxx)::', r'\g<0>%s' % _versioned_namespace, base) self.add(vbase + name, function) # Add a name using _GLIBCXX_BEGIN_NAMESPACE_CONTAINER. def add_container(self, base, name, function): self.add_version(base, name, function) self.add_version(base + '__cxx1998::', name, function) @staticmethod def get_basic_type(type): # If it points to a reference, get the reference. if type.code == gdb.TYPE_CODE_REF: type = type.target() # Get the unqualified type, stripped of typedefs. type = type.unqualified().strip_typedefs() return type.tag def __call__(self, val): typename = self.get_basic_type(val.type) if not typename: return None # All the types we match are template types, so we can use a # dictionary. match = self._compiled_rx.match(typename) if not match: return None basename = match.group(1) if val.type.code == gdb.TYPE_CODE_REF: if hasattr(gdb.Value, "referenced_value"): val = val.referenced_value() if basename in self._lookup: return self._lookup[basename].invoke(val) # Cannot find a pretty printer. Return None. return None libstdcxx_printer = None class TemplateTypePrinter(object): """ A type printer for class templates with default template arguments. Recognizes specializations of class templates and prints them without any template arguments that use a default template argument. Type printers are recursively applied to the template arguments. e.g. replace 'std::vector<T, std::allocator<T> >' with 'std::vector<T>'. """ def __init__(self, name, defargs): self.name = name self._defargs = defargs self.enabled = True class _recognizer(object): """The recognizer class for TemplateTypePrinter.""" def __init__(self, name, defargs): self.name = name self._defargs = defargs # self._type_obj = None def recognize(self, type_obj): """ If type_obj is a specialization of self.name that uses all the default template arguments for the class template, then return a string representation of the type without default arguments. Otherwise, return None. """ if type_obj.tag is None: return None if not type_obj.tag.startswith(self.name): return None template_args = get_template_arg_list(type_obj) displayed_args = [] require_defaulted = False for n in range(len(template_args)): # The actual template argument in the type: targ = template_args[n] # The default template argument for the class template: defarg = self._defargs.get(n) if defarg is not None: # Substitute other template arguments into the default: defarg = defarg.format(*template_args) # Fail to recognize the type (by returning None) # unless the actual argument is the same as the default. try: if targ != gdb.lookup_type(defarg): return None except gdb.error: # Type lookup failed, just use string comparison: if targ.tag != defarg: return None # All subsequent args must have defaults: require_defaulted = True elif require_defaulted: return None else: # Recursively apply recognizers to the template argument # and add it to the arguments that will be displayed: displayed_args.append(self._recognize_subtype(targ)) # This assumes no class templates in the nested-name-specifier: template_name = type_obj.tag[0:type_obj.tag.find('<')] template_name = strip_inline_namespaces(template_name) return template_name + '<' + ', '.join(displayed_args) + '>' def _recognize_subtype(self, type_obj): """Convert a gdb.Type to a string by applying recognizers, or if that fails then simply converting to a string.""" if type_obj.code == gdb.TYPE_CODE_PTR: return self._recognize_subtype(type_obj.target()) + '*' if type_obj.code == gdb.TYPE_CODE_ARRAY: type_str = self._recognize_subtype(type_obj.target()) if str(type_obj.strip_typedefs()).endswith('[]'): return type_str + '[]' # array of unknown bound return "%s[%d]" % (type_str, type_obj.range()[1] + 1) if type_obj.code == gdb.TYPE_CODE_REF: return self._recognize_subtype(type_obj.target()) + '&' if hasattr(gdb, 'TYPE_CODE_RVALUE_REF'): if type_obj.code == gdb.TYPE_CODE_RVALUE_REF: return self._recognize_subtype(type_obj.target()) + '&&' type_str = gdb.types.apply_type_recognizers( gdb.types.get_type_recognizers(), type_obj) if type_str: return type_str return str(type_obj) def instantiate(self): """Return a recognizer object for this type printer.""" return self._recognizer(self.name, self._defargs) def add_one_template_type_printer(obj, name, defargs): """ Add a type printer for a class template with default template arguments. Args: name (str): The template-name of the class template. defargs (dict int:string) The default template arguments. Types in defargs can refer to the Nth template-argument using {N} (with zero-based indices). e.g. 'unordered_map' has these defargs: { 2: 'std::hash<{0}>', 3: 'std::equal_to<{0}>', 4: 'std::allocator<std::pair<const {0}, {1}> >' } """ printer = TemplateTypePrinter('std::' + name, defargs) gdb.types.register_type_printer(obj, printer) # Add type printer for same type in debug namespace: printer = TemplateTypePrinter('std::__debug::' + name, defargs) gdb.types.register_type_printer(obj, printer) if '__cxx11' not in name: # Add second type printer for same type in versioned namespace: ns = 'std::' + _versioned_namespace # PR 86112 Cannot use dict comprehension here: defargs = dict((n, d.replace('std::', ns)) for (n, d) in defargs.items()) printer = TemplateTypePrinter(ns + name, defargs) gdb.types.register_type_printer(obj, printer) # Add type printer for same type in debug namespace: printer = TemplateTypePrinter('std::__debug::' + name, defargs) gdb.types.register_type_printer(obj, printer) class FilteringTypePrinter(object): """ A type printer that uses typedef names for common template specializations. Args: template (str): The class template to recognize. name (str): The typedef-name that will be used instead. targ1 (str, optional): The first template argument. Defaults to None. Checks if a specialization of the class template 'template' is the same type as the typedef 'name', and prints it as 'name' instead. e.g. if an instantiation of std::basic_istream<C, T> is the same type as std::istream then print it as std::istream. If targ1 is provided (not None), match only template specializations with this type as the first template argument, e.g. if template='basic_string' and targ1='char' then only match 'basic_string<char,...>' and not 'basic_string<wchar_t,...>'. This rejects non-matching specializations more quickly, without needing to do GDB type lookups. """ def __init__(self, template, name, targ1=None): self._template = template self.name = name self._targ1 = targ1 self.enabled = True class _recognizer(object): """The recognizer class for FilteringTypePrinter.""" def __init__(self, template, name, targ1): self._template = template self.name = name self._targ1 = targ1 self._type_obj = None def recognize(self, type_obj): """ If type_obj starts with self._template and is the same type as self.name then return self.name, otherwise None. """ if type_obj.tag is None: return None if self._type_obj is None: if self._targ1 is not None: s = '{}<{}'.format(self._template, self._targ1) if not type_obj.tag.startswith(s): # Filter didn't match. return None elif not type_obj.tag.startswith(self._template): # Filter didn't match. return None try: self._type_obj = gdb.lookup_type( self.name).strip_typedefs() except: pass if self._type_obj is None: return None t1 = gdb.types.get_basic_type(self._type_obj) t2 = gdb.types.get_basic_type(type_obj) if t1 == t2: return strip_inline_namespaces(self.name) # Workaround ambiguous typedefs matching both std:: and # std::__cxx11:: symbols. if self._template.split('::')[-1] == 'basic_string': s1 = self._type_obj.tag.replace('__cxx11::', '') s2 = type_obj.tag.replace('__cxx11::', '') if s1 == s2: return strip_inline_namespaces(self.name) return None def instantiate(self): """Return a recognizer object for this type printer.""" return self._recognizer(self._template, self.name, self._targ1) def add_one_type_printer(obj, template, name, targ1=None): printer = FilteringTypePrinter('std::' + template, 'std::' + name, targ1) gdb.types.register_type_printer(obj, printer) if '__cxx11' not in template: ns = 'std::' + _versioned_namespace printer = FilteringTypePrinter(ns + template, ns + name, targ1) gdb.types.register_type_printer(obj, printer) def register_type_printers(obj): global _use_type_printing if not _use_type_printing: return # Add type printers for typedefs std::string, std::wstring etc. for ch in (('', 'char'), ('w', 'wchar_t'), ('u8', 'char8_t'), ('u16', 'char16_t'), ('u32', 'char32_t')): add_one_type_printer(obj, 'basic_string', ch[0] + 'string', ch[1]) add_one_type_printer(obj, '__cxx11::basic_string', ch[0] + 'string', ch[1]) # Typedefs for __cxx11::basic_string used to be in namespace __cxx11: add_one_type_printer(obj, '__cxx11::basic_string', '__cxx11::' + ch[0] + 'string', ch[1]) add_one_type_printer(obj, 'basic_string_view', ch[0] + 'string_view', ch[1]) # Add type printers for typedefs std::istream, std::wistream etc. for ch in (('', 'char'), ('w', 'wchar_t')): for x in ('ios', 'streambuf', 'istream', 'ostream', 'iostream', 'filebuf', 'ifstream', 'ofstream', 'fstream'): add_one_type_printer(obj, 'basic_' + x, ch[0] + x, ch[1]) for x in ('stringbuf', 'istringstream', 'ostringstream', 'stringstream'): add_one_type_printer(obj, 'basic_' + x, ch[0] + x, ch[1]) # <sstream> types are in __cxx11 namespace, but typedefs aren't: add_one_type_printer(obj, '__cxx11::basic_' + x, ch[0] + x, ch[1]) # Add type printers for typedefs regex, wregex, cmatch, wcmatch etc. for abi in ('', '__cxx11::'): for ch in (('', 'char'), ('w', 'wchar_t')): add_one_type_printer(obj, abi + 'basic_regex', abi + ch[0] + 'regex', ch[1]) for ch in ('c', 's', 'wc', 'ws'): add_one_type_printer( obj, abi + 'match_results', abi + ch + 'match') for x in ('sub_match', 'regex_iterator', 'regex_token_iterator'): add_one_type_printer(obj, abi + x, abi + ch + x) # Note that we can't have a printer for std::wstreampos, because # it is the same type as std::streampos. add_one_type_printer(obj, 'fpos', 'streampos') # Add type printers for <chrono> typedefs. for dur in ('nanoseconds', 'microseconds', 'milliseconds', 'seconds', 'minutes', 'hours', 'days', 'weeks', 'years', 'months'): add_one_type_printer(obj, 'chrono::duration', 'chrono::' + dur) # Add type printers for <random> typedefs. add_one_type_printer(obj, 'linear_congruential_engine', 'minstd_rand0') add_one_type_printer(obj, 'linear_congruential_engine', 'minstd_rand') add_one_type_printer(obj, 'mersenne_twister_engine', 'mt19937') add_one_type_printer(obj, 'mersenne_twister_engine', 'mt19937_64') add_one_type_printer(obj, 'subtract_with_carry_engine', 'ranlux24_base') add_one_type_printer(obj, 'subtract_with_carry_engine', 'ranlux48_base') add_one_type_printer(obj, 'discard_block_engine', 'ranlux24') add_one_type_printer(obj, 'discard_block_engine', 'ranlux48') add_one_type_printer(obj, 'shuffle_order_engine', 'knuth_b') # Add type printers for experimental::basic_string_view typedefs. ns = 'experimental::fundamentals_v1::' for ch in (('', 'char'), ('w', 'wchar_t'), ('u8', 'char8_t'), ('u16', 'char16_t'), ('u32', 'char32_t')): add_one_type_printer(obj, ns + 'basic_string_view', ns + ch[0] + 'string_view', ch[1]) # Do not show defaulted template arguments in class templates. add_one_template_type_printer(obj, 'unique_ptr', {1: 'std::default_delete<{0}>'}) add_one_template_type_printer(obj, 'deque', {1: 'std::allocator<{0}>'}) add_one_template_type_printer( obj, 'forward_list', {1: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'list', {1: 'std::allocator<{0}>'}) add_one_template_type_printer( obj, '__cxx11::list', {1: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'vector', {1: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'map', {2: 'std::less<{0}>', 3: 'std::allocator<std::pair<{0} const, {1}>>'}) add_one_template_type_printer(obj, 'multimap', {2: 'std::less<{0}>', 3: 'std::allocator<std::pair<{0} const, {1}>>'}) add_one_template_type_printer(obj, 'set', {1: 'std::less<{0}>', 2: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'multiset', {1: 'std::less<{0}>', 2: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'unordered_map', {2: 'std::hash<{0}>', 3: 'std::equal_to<{0}>', 4: 'std::allocator<std::pair<{0} const, {1}>>'}) add_one_template_type_printer(obj, 'unordered_multimap', {2: 'std::hash<{0}>', 3: 'std::equal_to<{0}>', 4: 'std::allocator<std::pair<{0} const, {1}>>'}) add_one_template_type_printer(obj, 'unordered_set', {1: 'std::hash<{0}>', 2: 'std::equal_to<{0}>', 3: 'std::allocator<{0}>'}) add_one_template_type_printer(obj, 'unordered_multiset', {1: 'std::hash<{0}>', 2: 'std::equal_to<{0}>', 3: 'std::allocator<{0}>'}) def register_libstdcxx_printers(obj): """Register libstdc++ pretty-printers with objfile Obj.""" global _use_gdb_pp global libstdcxx_printer if _use_gdb_pp: gdb.printing.register_pretty_printer(obj, libstdcxx_printer) else: if obj is None: obj = gdb obj.pretty_printers.append(libstdcxx_printer) register_type_printers(obj) def build_libstdcxx_dictionary(): global libstdcxx_printer libstdcxx_printer = Printer("libstdc++-v6") # libstdc++ objects requiring pretty-printing. # In order from: # http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01847.html libstdcxx_printer.add_version('std::', 'basic_string', StdStringPrinter) libstdcxx_printer.add_version( 'std::__cxx11::', 'basic_string', StdStringPrinter) libstdcxx_printer.add_container('std::', 'bitset', StdBitsetPrinter) libstdcxx_printer.add_container('std::', 'deque', StdDequePrinter) libstdcxx_printer.add_container('std::', 'list', StdListPrinter) libstdcxx_printer.add_container('std::__cxx11::', 'list', StdListPrinter) libstdcxx_printer.add_container('std::', 'map', StdMapPrinter) libstdcxx_printer.add_container('std::', 'multimap', StdMapPrinter) libstdcxx_printer.add_container('std::', 'multiset', StdSetPrinter) libstdcxx_printer.add_version('std::', 'pair', StdPairPrinter) libstdcxx_printer.add_version('std::', 'priority_queue', StdStackOrQueuePrinter) libstdcxx_printer.add_version('std::', 'queue', StdStackOrQueuePrinter) libstdcxx_printer.add_version('std::', 'tuple', StdTuplePrinter) libstdcxx_printer.add_container('std::', 'set', StdSetPrinter) libstdcxx_printer.add_version('std::', 'stack', StdStackOrQueuePrinter) libstdcxx_printer.add_version('std::', 'unique_ptr', UniquePointerPrinter) libstdcxx_printer.add_container('std::', 'vector', StdVectorPrinter) # vector<bool> libstdcxx_printer.add_version('std::', 'locale', StdLocalePrinter) if hasattr(gdb.Value, 'dynamic_type'): libstdcxx_printer.add_version('std::', 'error_code', StdErrorCodePrinter) libstdcxx_printer.add_version('std::', 'error_condition', StdErrorCodePrinter) # Printer registrations for classes compiled with -D_GLIBCXX_DEBUG. libstdcxx_printer.add('std::__debug::bitset', StdBitsetPrinter) libstdcxx_printer.add('std::__debug::deque', StdDequePrinter) libstdcxx_printer.add('std::__debug::list', StdListPrinter) libstdcxx_printer.add('std::__debug::map', StdMapPrinter) libstdcxx_printer.add('std::__debug::multimap', StdMapPrinter) libstdcxx_printer.add('std::__debug::multiset', StdSetPrinter) libstdcxx_printer.add('std::__debug::set', StdSetPrinter) libstdcxx_printer.add('std::__debug::vector', StdVectorPrinter) # These are the TR1 and C++11 printers. # For array - the default GDB pretty-printer seems reasonable. libstdcxx_printer.add_version('std::', 'shared_ptr', SharedPointerPrinter) libstdcxx_printer.add_version('std::', 'weak_ptr', SharedPointerPrinter) libstdcxx_printer.add_container('std::', 'unordered_map', Tr1UnorderedMapPrinter) libstdcxx_printer.add_container('std::', 'unordered_set', Tr1UnorderedSetPrinter) libstdcxx_printer.add_container('std::', 'unordered_multimap', Tr1UnorderedMapPrinter) libstdcxx_printer.add_container('std::', 'unordered_multiset', Tr1UnorderedSetPrinter) libstdcxx_printer.add_container('std::', 'forward_list', StdForwardListPrinter) libstdcxx_printer.add_version( 'std::tr1::', 'shared_ptr', SharedPointerPrinter) libstdcxx_printer.add_version( 'std::tr1::', 'weak_ptr', SharedPointerPrinter) libstdcxx_printer.add_version('std::tr1::', 'unordered_map', Tr1UnorderedMapPrinter) libstdcxx_printer.add_version('std::tr1::', 'unordered_set', Tr1UnorderedSetPrinter) libstdcxx_printer.add_version('std::tr1::', 'unordered_multimap', Tr1UnorderedMapPrinter) libstdcxx_printer.add_version('std::tr1::', 'unordered_multiset', Tr1UnorderedSetPrinter) libstdcxx_printer.add_version('std::', 'initializer_list', StdInitializerListPrinter) libstdcxx_printer.add_version('std::', 'atomic', StdAtomicPrinter) libstdcxx_printer.add_version( 'std::', 'basic_stringbuf', StdStringBufPrinter) libstdcxx_printer.add_version( 'std::__cxx11::', 'basic_stringbuf', StdStringBufPrinter) for sstream in ('istringstream', 'ostringstream', 'stringstream'): libstdcxx_printer.add_version( 'std::', 'basic_' + sstream, StdStringStreamPrinter) libstdcxx_printer.add_version( 'std::__cxx11::', 'basic_' + sstream, StdStringStreamPrinter) libstdcxx_printer.add_version('std::chrono::', 'duration', StdChronoDurationPrinter) libstdcxx_printer.add_version('std::chrono::', 'time_point', StdChronoTimePointPrinter) libstdcxx_printer.add_version('std::', 'integral_constant', StdIntegralConstantPrinter) # std::regex components libstdcxx_printer.add_version('std::__detail::', '_State', StdRegexStatePrinter) # These are the C++11 printer registrations for -D_GLIBCXX_DEBUG cases. # The tr1 namespace containers do not have any debug equivalents, # so do not register printers for them. libstdcxx_printer.add('std::__debug::unordered_map', Tr1UnorderedMapPrinter) libstdcxx_printer.add('std::__debug::unordered_set', Tr1UnorderedSetPrinter) libstdcxx_printer.add('std::__debug::unordered_multimap', Tr1UnorderedMapPrinter) libstdcxx_printer.add('std::__debug::unordered_multiset', Tr1UnorderedSetPrinter) libstdcxx_printer.add('std::__debug::forward_list', StdForwardListPrinter) # Library Fundamentals TS components libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', 'any', StdExpAnyPrinter) libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', 'optional', StdExpOptionalPrinter) libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', 'basic_string_view', StdExpStringViewPrinter) # Filesystem TS components libstdcxx_printer.add_version('std::experimental::filesystem::v1::', 'path', StdExpPathPrinter) libstdcxx_printer.add_version('std::experimental::filesystem::v1::__cxx11::', 'path', StdExpPathPrinter) libstdcxx_printer.add_version('std::filesystem::', 'path', StdPathPrinter) libstdcxx_printer.add_version('std::filesystem::__cxx11::', 'path', StdPathPrinter) # C++17 components libstdcxx_printer.add_version('std::', 'any', StdExpAnyPrinter) libstdcxx_printer.add_version('std::', 'optional', StdExpOptionalPrinter) libstdcxx_printer.add_version('std::', 'basic_string_view', StdExpStringViewPrinter) libstdcxx_printer.add_version('std::', 'variant', StdVariantPrinter) libstdcxx_printer.add_version('std::', '_Node_handle', StdNodeHandlePrinter) # C++20 components libstdcxx_printer.add_version( 'std::', 'partial_ordering', StdCmpCatPrinter) libstdcxx_printer.add_version('std::', 'weak_ordering', StdCmpCatPrinter) libstdcxx_printer.add_version('std::', 'strong_ordering', StdCmpCatPrinter) libstdcxx_printer.add_version('std::', 'span', StdSpanPrinter) libstdcxx_printer.add_version('std::', 'basic_format_args', StdFormatArgsPrinter) for c in ['day', 'month', 'year', 'weekday', 'weekday_indexed', 'weekday_last', 'month_day', 'month_day_last', 'month_weekday', 'month_weekday_last', 'year_month', 'year_month_day', 'year_month_day_last', 'year_month_weekday', 'year_month_weekday_last', 'hh_mm_ss']: libstdcxx_printer.add_version('std::chrono::', c, StdChronoCalendarPrinter) libstdcxx_printer.add_version('std::chrono::', 'time_zone', StdChronoTimeZonePrinter) libstdcxx_printer.add_version('std::chrono::', 'time_zone_link', StdChronoTimeZonePrinter) libstdcxx_printer.add_version('std::chrono::', 'zoned_time', StdChronoZonedTimePrinter) libstdcxx_printer.add_version('std::chrono::', 'leap_second', StdChronoLeapSecondPrinter) libstdcxx_printer.add_version( 'std::chrono::', 'tzdb', StdChronoTzdbPrinter) # libstdcxx_printer.add_version('std::chrono::(anonymous namespace)', 'Rule', # StdChronoTimeZoneRulePrinter) # C++26 components libstdcxx_printer.add_version('std::', 'text_encoding', StdTextEncodingPrinter) # Extensions. libstdcxx_printer.add_version('__gnu_cxx::', 'slist', StdSlistPrinter) if True: # These shouldn't be necessary, if GDB "print *i" worked. # But it often doesn't, so here they are. libstdcxx_printer.add_container('std::', '_List_iterator', StdListIteratorPrinter) libstdcxx_printer.add_container('std::', '_List_const_iterator', StdListIteratorPrinter) libstdcxx_printer.add_version('std::', '_Rb_tree_iterator', StdRbtreeIteratorPrinter) libstdcxx_printer.add_version('std::', '_Rb_tree_const_iterator', StdRbtreeIteratorPrinter) libstdcxx_printer.add_container('std::', '_Deque_iterator', StdDequeIteratorPrinter) libstdcxx_printer.add_container('std::', '_Deque_const_iterator', StdDequeIteratorPrinter) libstdcxx_printer.add_version('__gnu_cxx::', '__normal_iterator', StdVectorIteratorPrinter) libstdcxx_printer.add_container('std::', '_Bit_iterator', StdBitIteratorPrinter) libstdcxx_printer.add_container('std::', '_Bit_const_iterator', StdBitIteratorPrinter) libstdcxx_printer.add_container('std::', '_Bit_reference', StdBitReferencePrinter) libstdcxx_printer.add_version('__gnu_cxx::', '_Slist_iterator', StdSlistIteratorPrinter) libstdcxx_printer.add_container('std::', '_Fwd_list_iterator', StdFwdListIteratorPrinter) libstdcxx_printer.add_container('std::', '_Fwd_list_const_iterator', StdFwdListIteratorPrinter) # Debug (compiled with -D_GLIBCXX_DEBUG) printer # registrations. libstdcxx_printer.add('__gnu_debug::_Safe_iterator', StdDebugIteratorPrinter) build_libstdcxx_dictionary()
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