diff options
author | Jonathan Wakely <jwakely@redhat.com> | 2018-01-15 11:13:53 +0000 |
---|---|---|
committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-01-15 11:13:53 +0000 |
commit | bab0a26de5cfe4e99e894d0be7ec983076d48cdf (patch) | |
tree | bfb765317e9e4e7b23107ed6cca7d135c09afa29 /libstdc++-v3/python | |
parent | ed99ae13bb59965285a91bbb86563390dc2038ac (diff) |
PR libstdc++/80276 fix template argument handling in type printers
PR libstdc++/80276
* python/libstdcxx/v6/printers.py (strip_inline_namespaces): New.
(get_template_arg_list): New.
(StdVariantPrinter._template_args): Remove, use get_template_arg_list
instead.
(TemplateTypePrinter): Rewrite to work with gdb.Type objects instead
of strings and regular expressions.
(add_one_template_type_printer): Adapt to new TemplateTypePrinter.
(FilteringTypePrinter): Add docstring. Match using startswith. Use
strip_inline_namespaces instead of strip_versioned_namespace.
(add_one_type_printer): Prepend namespace to match argument.
(register_type_printers): Add type printers for char16_t and char32_t
string types and for types using cxx11 ABI. Update calls to
add_one_template_type_printer to provide default argument dicts.
* testsuite/libstdc++-prettyprinters/80276.cc: New test.
* testsuite/libstdc++-prettyprinters/whatis.cc: Remove tests for
basic_string<unsigned char> and basic_string<signed char>.
* testsuite/libstdc++-prettyprinters/whatis2.cc: Duplicate whatis.cc
to test local variables, without overriding _GLIBCXX_USE_CXX11_ABI.
From-SVN: r256689
Diffstat (limited to 'libstdc++-v3/python')
-rw-r--r-- | libstdc++-v3/python/libstdcxx/v6/printers.py | 370 |
1 files changed, 222 insertions, 148 deletions
diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py index d6de0969e1c..c490880cd10 100644 --- a/libstdc++-v3/python/libstdcxx/v6/printers.py +++ b/libstdc++-v3/python/libstdcxx/v6/printers.py @@ -101,8 +101,8 @@ def find_type(orig, name): _versioned_namespace = '__8::' -# Test if a type is a given template instantiation. def is_specialization_of(type, template_name): + "Test if a type is a given template instantiation." global _versioned_namespace if _versioned_namespace: return re.match('^std::(%s)?%s<.*>$' % (_versioned_namespace, template_name), type) is not None @@ -114,6 +114,28 @@ def strip_versioned_namespace(typename): return typename.replace(_versioned_namespace, '') return typename +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" @@ -1063,7 +1085,7 @@ class StdVariantPrinter(SingleObjContainerPrinter): "Print a std::variant" def __init__(self, typename, val): - alternatives = self._template_args(val) + alternatives = get_template_arg_list(val.type) self.typename = strip_versioned_namespace(typename) self.typename = "%s<%s>" % (self.typename, ', '.join([self._recognize(alt) for alt in alternatives])) self.index = val['_M_index'] @@ -1078,17 +1100,6 @@ class StdVariantPrinter(SingleObjContainerPrinter): visualizer = gdb.default_visualizer(contained_value) super (StdVariantPrinter, self).__init__(contained_value, visualizer, 'array') - @staticmethod - def _template_args(val): - n = 0 - args = [] - while True: - try: - args.append(val.type.template_argument(n)) - except: - return args - n += 1 - def to_string(self): if self.contained_value is None: return "%s [no contained value]" % self.typename @@ -1294,84 +1305,168 @@ libstdcxx_printer = None class TemplateTypePrinter(object): r""" - A type printer for class templates. + A type printer for class templates with default template arguments. - Recognizes type names that match a regular expression. - Replaces them with a formatted string which can use replacement field - {N} to refer to the \N subgroup of the regex match. - Type printers are recusively applied to the subgroups. + 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. - This allows recognizing e.g. "std::vector<(.*), std::allocator<\\1> >" - and replacing it with "std::vector<{1}>", omitting the template argument - that uses the default type. + e.g. replace "std::vector<T, std::allocator<T> >" with "std::vector<T>". """ - def __init__(self, name, pattern, subst): + def __init__(self, name, defargs): self.name = name - self.pattern = re.compile(pattern) - self.subst = subst + self.defargs = defargs self.enabled = True class _recognizer(object): - def __init__(self, pattern, subst): - self.pattern = pattern - self.subst = subst - self.type_obj = None + "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 - m = self.pattern.match(type_obj.tag) - if m: - subs = list(m.groups()) - for i, sub in enumerate(subs): - if ('{%d}' % (i+1)) in self.subst: - # apply recognizers to subgroup - try: - subtype = gdb.lookup_type(sub) - except gdb.error: - continue - rep = gdb.types.apply_type_recognizers( - gdb.types.get_type_recognizers(), - subtype) - if rep: - subs[i] = rep - subs = [None] + subs - return self.subst.format(*subs) - 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 self._recognizer(self.pattern, self.subst) + "Return a recognizer object for this type printer." + return self._recognizer(self.name, self.defargs) -def add_one_template_type_printer(obj, name, match, subst): - match = '^std::' + match + '$' - printer = TemplateTypePrinter(name, match, 'std::' + subst) +def add_one_template_type_printer(obj, name, defargs): + r""" + 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) if _versioned_namespace: # Add second type printer for same type in versioned namespace: - match = match.replace('std::', 'std::' + _versioned_namespace) - printer = TemplateTypePrinter(name, match, 'std::' + subst) + ns = 'std::' + _versioned_namespace + defargs = { n: d.replace('std::', ns) for n,d in defargs.items() } + printer = TemplateTypePrinter(ns+name, defargs) gdb.types.register_type_printer(obj, printer) class FilteringTypePrinter(object): + r""" + A type printer that uses typedef names for common template specializations. + + Args: + match (str): The class template to recognize. + name (str): The typedef-name that will be used instead. + + Checks if a specialization of the class template 'match' 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. + """ + def __init__(self, match, name): self.match = match self.name = name self.enabled = True class _recognizer(object): + "The recognizer class for TemplateTypePrinter." + def __init__(self, match, name): self.match = match self.name = name self.type_obj = None def recognize(self, type_obj): + """ + If type_obj starts with self.match 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 not self.match in type_obj.tag: + if not type_obj.tag.startswith(self.match): # Filter didn't match. return None try: @@ -1379,17 +1474,19 @@ class FilteringTypePrinter(object): except: pass if self.type_obj == type_obj: - return strip_versioned_namespace(self.name) + return strip_inline_namespaces(self.name) return None def instantiate(self): + "Return a recognizer object for this type printer." return self._recognizer(self.match, self.name) def add_one_type_printer(obj, match, name): - printer = FilteringTypePrinter(match, 'std::' + name) + printer = FilteringTypePrinter('std::' + match, 'std::' + name) gdb.types.register_type_printer(obj, printer) if _versioned_namespace: - printer = FilteringTypePrinter(match, 'std::' + _versioned_namespace + name) + ns = 'std::' + _versioned_namespace + printer = FilteringTypePrinter(ns + match, ns + name) gdb.types.register_type_printer(obj, printer) def register_type_printers(obj): @@ -1398,50 +1495,43 @@ def register_type_printers(obj): if not _use_type_printing: return - for pfx in ('', 'w'): - add_one_type_printer(obj, 'basic_string', pfx + 'string') - add_one_type_printer(obj, 'basic_string_view', pfx + 'string_view') - add_one_type_printer(obj, 'basic_ios', pfx + 'ios') - add_one_type_printer(obj, 'basic_streambuf', pfx + 'streambuf') - add_one_type_printer(obj, 'basic_istream', pfx + 'istream') - add_one_type_printer(obj, 'basic_ostream', pfx + 'ostream') - add_one_type_printer(obj, 'basic_iostream', pfx + 'iostream') - add_one_type_printer(obj, 'basic_stringbuf', pfx + 'stringbuf') - add_one_type_printer(obj, 'basic_istringstream', - pfx + 'istringstream') - add_one_type_printer(obj, 'basic_ostringstream', - pfx + 'ostringstream') - add_one_type_printer(obj, 'basic_stringstream', - pfx + 'stringstream') - add_one_type_printer(obj, 'basic_filebuf', pfx + 'filebuf') - add_one_type_printer(obj, 'basic_ifstream', pfx + 'ifstream') - add_one_type_printer(obj, 'basic_ofstream', pfx + 'ofstream') - add_one_type_printer(obj, 'basic_fstream', pfx + 'fstream') - add_one_type_printer(obj, 'basic_regex', pfx + 'regex') - add_one_type_printer(obj, 'sub_match', pfx + 'csub_match') - add_one_type_printer(obj, 'sub_match', pfx + 'ssub_match') - add_one_type_printer(obj, 'match_results', pfx + 'cmatch') - add_one_type_printer(obj, 'match_results', pfx + 'smatch') - add_one_type_printer(obj, 'regex_iterator', pfx + 'cregex_iterator') - add_one_type_printer(obj, 'regex_iterator', pfx + 'sregex_iterator') - add_one_type_printer(obj, 'regex_token_iterator', - pfx + 'cregex_token_iterator') - add_one_type_printer(obj, 'regex_token_iterator', - pfx + 'sregex_token_iterator') + # Add type printers for typedefs std::string, std::wstring etc. + for ch in ('', 'w', 'u16', 'u32'): + add_one_type_printer(obj, 'basic_string', ch + 'string') + add_one_type_printer(obj, '__cxx11::basic_string', + '__cxx11::' + ch + 'string') + add_one_type_printer(obj, 'basic_string_view', ch + 'string_view') + + # Add type printers for typedefs std::istream, std::wistream etc. + for ch in ('', 'w'): + for x in ('ios', 'streambuf', 'istream', 'ostream', 'iostream', + 'filebuf', 'ifstream', 'ofstream', 'fstream'): + add_one_type_printer(obj, 'basic_' + x, ch + x) + for x in ('stringbuf', 'istringstream', 'ostringstream', + 'stringstream'): + add_one_type_printer(obj, 'basic_' + x, ch + x) + # <sstream> types are in __cxx11 namespace, but typedefs aren'x: + add_one_type_printer(obj, '__cxx11::basic_' + x, ch + x) + + # Add type printers for typedefs regex, wregex, cmatch, wcmatch etc. + for abi in ('', '__cxx11::'): + for ch in ('', 'w'): + add_one_type_printer(obj, abi + 'basic_regex', abi + ch + 'regex') + 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 shares the same underlying type as std::streampos. + # it is the same type as std::streampos. add_one_type_printer(obj, 'fpos', 'streampos') - add_one_type_printer(obj, 'basic_string', 'u16string') - add_one_type_printer(obj, 'basic_string', 'u32string') - add_one_type_printer(obj, 'basic_string_view', 'u16string_view') - add_one_type_printer(obj, 'basic_string_view', 'u32string_view') - + # Add type printers for <chrono> typedefs. for dur in ('nanoseconds', 'microseconds', 'milliseconds', 'seconds', 'minutes', 'hours'): add_one_type_printer(obj, 'duration', 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') @@ -1452,62 +1542,46 @@ def register_type_printers(obj): add_one_type_printer(obj, 'discard_block_engine', 'ranlux48') add_one_type_printer(obj, 'shuffle_order_engine', 'knuth_b') - # Do not show defaulted template arguments in class templates - add_one_template_type_printer(obj, 'unique_ptr<T>', - 'unique_ptr<(.*), std::default_delete<\\1 ?> >', - 'unique_ptr<{1}>') - - add_one_template_type_printer(obj, 'basic_string<T>', - 'basic_string<((un)?signed char), std::char_traits<\\1 ?>, std::allocator<\\1 ?> >', - 'basic_string<{1}>') - - add_one_template_type_printer(obj, 'deque<T>', - 'deque<(.*), std::allocator<\\1 ?> >', - 'deque<{1}>') - add_one_template_type_printer(obj, 'forward_list<T>', - 'forward_list<(.*), std::allocator<\\1 ?> >', - 'forward_list<{1}>') - add_one_template_type_printer(obj, 'list<T>', - 'list<(.*), std::allocator<\\1 ?> >', - 'list<{1}>') - add_one_template_type_printer(obj, 'vector<T>', - 'vector<(.*), std::allocator<\\1 ?> >', - 'vector<{1}>') - add_one_template_type_printer(obj, 'map<Key, T>', - 'map<(.*), (.*), std::less<\\1 ?>, std::allocator<std::pair<\\1 const, \\2 ?> > >', - 'map<{1}, {2}>') - add_one_template_type_printer(obj, 'multimap<Key, T>', - 'multimap<(.*), (.*), std::less<\\1 ?>, std::allocator<std::pair<\\1 const, \\2 ?> > >', - 'multimap<{1}, {2}>') - add_one_template_type_printer(obj, 'set<T>', - 'set<(.*), std::less<\\1 ?>, std::allocator<\\1 ?> >', - 'set<{1}>') - add_one_template_type_printer(obj, 'multiset<T>', - 'multiset<(.*), std::less<\\1 ?>, std::allocator<\\1 ?> >', - 'multiset<{1}>') - add_one_template_type_printer(obj, 'unordered_map<Key, T>', - 'unordered_map<(.*), (.*), std::hash<\\1 ?>, std::equal_to<\\1 ?>, std::allocator<std::pair<\\1 const, \\2 ?> > >', - 'unordered_map<{1}, {2}>') - add_one_template_type_printer(obj, 'unordered_multimap<Key, T>', - 'unordered_multimap<(.*), (.*), std::hash<\\1 ?>, std::equal_to<\\1 ?>, std::allocator<std::pair<\\1 const, \\2 ?> > >', - 'unordered_multimap<{1}, {2}>') - add_one_template_type_printer(obj, 'unordered_set<T>', - 'unordered_set<(.*), std::hash<\\1 ?>, std::equal_to<\\1 ?>, std::allocator<\\1 ?> >', - 'unordered_set<{1}>') - add_one_template_type_printer(obj, 'unordered_multiset<T>', - 'unordered_multiset<(.*), std::hash<\\1 ?>, std::equal_to<\\1 ?>, std::allocator<\\1 ?> >', - 'unordered_multiset<{1}>') - - # strip the "fundamentals_v1" inline namespace from these types - add_one_template_type_printer(obj, 'any<T>', - 'experimental::fundamentals_v\d::any<(.*)>', - 'experimental::any<\\1>') - add_one_template_type_printer(obj, 'optional<T>', - 'experimental::fundamentals_v\d::optional<(.*)>', - 'experimental::optional<\\1>') - add_one_template_type_printer(obj, 'basic_string_view<C>', - 'experimental::fundamentals_v\d::basic_string_view<(.*), std::char_traits<\\1> >', - 'experimental::basic_string_view<\\1>') + # Add type printers for experimental::basic_string_view typedefs. + ns = 'experimental::fundamentals_v1::' + for ch in ('', 'w', 'u16', 'u32'): + add_one_type_printer(obj, ns + 'basic_string_view', + ns + ch + 'string_view') + + # 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." |