1 # Copyright (C) 2008-2021 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # This file is part of the GDB testsuite. It tests python pretty
23 def _iterator(pointer, len):
27 yield ("[%d]" % int(pointer - start), pointer.dereference())
31 # Same as _iterator but can be told to raise an exception.
32 def _iterator_except(pointer, len):
37 raise gdb.MemoryError("hi bob")
38 yield ("[%d]" % int(pointer - start), pointer.dereference())
42 # Test returning a Value from a printer.
43 class string_print(object):
44 def __init__(self, val):
48 return self.val["whybother"]["contents"]
51 # Test a class-based printer.
52 class ContainerPrinter(object):
53 def __init__(self, val):
57 return "container %s with %d elements" % (self.val["name"], self.val["len"])
60 return _iterator(self.val["elements"], self.val["len"])
62 def display_hint(self):
63 if self.val["is_map_p"] and self.val["is_array_p"]:
64 raise Exception("invalid object state found in display_hint")
66 if self.val["is_map_p"]:
68 elif self.val["is_array_p"]:
74 # Treats a container as array.
75 class ArrayPrinter(object):
76 def __init__(self, val):
80 return "array %s with %d elements" % (self.val["name"], self.val["len"])
83 return _iterator(self.val["elements"], self.val["len"])
85 def display_hint(self):
89 # Flag to make NoStringContainerPrinter throw an exception.
90 exception_flag = False
92 # Test a printer where to_string is None
93 class NoStringContainerPrinter(object):
94 def __init__(self, val):
101 return _iterator_except(self.val["elements"], self.val["len"])
104 # See ToStringReturnsValueWrapper.
105 class ToStringReturnsValueInner:
106 def __init__(self, val):
110 return "Inner to_string {}".format(int(self.val["val"]))
113 # Test a printer that returns a gdb.Value in its to_string. That gdb.Value
114 # also has its own pretty-printer.
115 class ToStringReturnsValueWrapper:
116 def __init__(self, val):
120 return self.val["inner"]
124 def __init__(self, val):
131 raise Exception("&a(%s) != b(%s)" % (str(a.address), str(b)))
132 return " a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
136 def __init__(self, val):
140 return "a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
143 class pp_sss(object):
144 def __init__(self, val):
148 return "a=<" + str(self.val["a"]) + "> b=<" + str(self.val["b"]) + ">"
151 class pp_multiple_virtual(object):
152 def __init__(self, val):
156 return "pp value variable is: " + str(self.val["value"])
159 class pp_vbase1(object):
160 def __init__(self, val):
164 return "pp class name: " + self.val.type.tag
167 class pp_nullstr(object):
168 def __init__(self, val):
172 return self.val["s"].string(gdb.target_charset())
176 "Print a std::basic_string of some kind"
178 def __init__(self, val):
182 len = self.val["length"]
183 return self.val["null_str"].string(gdb.target_charset(), length=len)
185 def display_hint(self):
189 pp_ls_encoding = None
193 "Print a std::basic_string of some kind"
195 def __init__(self, val):
199 length = self.val["len"]
200 if pp_ls_encoding is not None:
202 return self.val["lazy_str"].lazy_string(
203 encoding=pp_ls_encoding, length=length
206 return self.val["lazy_str"].lazy_string(encoding=pp_ls_encoding)
209 return self.val["lazy_str"].lazy_string(length=length)
211 return self.val["lazy_str"].lazy_string()
213 def display_hint(self):
217 class pp_hint_error(object):
218 "Throw error from display_hint"
220 def __init__(self, val):
224 return "hint_error_val"
226 def display_hint(self):
227 raise Exception("hint failed")
230 class pp_children_as_list(object):
231 "Throw error from display_hint"
233 def __init__(self, val):
237 return "children_as_list_val"
243 class pp_outer(object):
246 def __init__(self, val):
250 return "x = %s" % self.val["x"]
253 yield "s", self.val["s"]
254 yield "x", self.val["x"]
257 class MemoryErrorString(object):
260 def __init__(self, val):
264 raise gdb.MemoryError("Cannot access memory.")
266 def display_hint(self):
270 class pp_eval_type(object):
271 def __init__(self, val):
275 gdb.execute("bt", to_string=True)
278 + str(gdb.parse_and_eval("eval_func (123456789, 2, 3, 4, 5, 6, 7, 8)"))
283 class pp_int_typedef(object):
284 def __init__(self, val):
288 return "type=%s, val=%s" % (self.val.type, int(self.val))
291 class pp_int_typedef3(object):
292 "A printer without a to_string method"
294 def __init__(self, val):
301 def lookup_function(val):
302 "Look-up and return a pretty-printer that can print val."
307 # If it points to a reference, get the reference.
308 if type.code == gdb.TYPE_CODE_REF:
311 # Get the unqualified type, stripped of typedefs.
312 type = type.unqualified().strip_typedefs()
320 # Iterate over local dictionary of types to determine
321 # if a printer is registered for that type. Return an
322 # instantiation of the printer if found.
323 for function in pretty_printers_dict:
324 if function.match(typename):
325 return pretty_printers_dict[function](val)
327 # Cannot find a pretty printer. Return None.
332 def disable_lookup_function():
333 lookup_function.enabled = False
336 def enable_lookup_function():
337 lookup_function.enabled = True
340 # Lookup a printer for VAL in the typedefs dict.
341 def lookup_typedefs_function(val):
342 "Look-up and return a pretty-printer that can print val (typedefs)."
347 if type is None or type.name is None or type.code != gdb.TYPE_CODE_TYPEDEF:
350 # Iterate over local dictionary of typedef types to determine if a
351 # printer is registered for that type. Return an instantiation of
352 # the printer if found.
353 for function in typedefs_pretty_printers_dict:
354 if function.match(type.name):
355 return typedefs_pretty_printers_dict[function](val)
357 # Cannot find a pretty printer.
361 def register_pretty_printers():
362 pretty_printers_dict[re.compile("^struct s$")] = pp_s
363 pretty_printers_dict[re.compile("^s$")] = pp_s
364 pretty_printers_dict[re.compile("^S$")] = pp_s
366 pretty_printers_dict[re.compile("^struct ss$")] = pp_ss
367 pretty_printers_dict[re.compile("^ss$")] = pp_ss
368 pretty_printers_dict[re.compile("^const S &$")] = pp_s
369 pretty_printers_dict[re.compile("^SSS$")] = pp_sss
371 pretty_printers_dict[re.compile("^VirtualTest$")] = pp_multiple_virtual
372 pretty_printers_dict[re.compile("^Vbase1$")] = pp_vbase1
374 pretty_printers_dict[re.compile("^struct nullstr$")] = pp_nullstr
375 pretty_printers_dict[re.compile("^nullstr$")] = pp_nullstr
377 # Note that we purposely omit the typedef names here.
378 # Printer lookup is based on canonical name.
379 # However, we do need both tagged and untagged variants, to handle
380 # both the C and C++ cases.
381 pretty_printers_dict[re.compile("^struct string_repr$")] = string_print
382 pretty_printers_dict[re.compile("^struct container$")] = ContainerPrinter
383 pretty_printers_dict[re.compile("^struct justchildren$")] = NoStringContainerPrinter
384 pretty_printers_dict[re.compile("^string_repr$")] = string_print
385 pretty_printers_dict[re.compile("^container$")] = ContainerPrinter
386 pretty_printers_dict[re.compile("^justchildren$")] = NoStringContainerPrinter
388 pretty_printers_dict[
389 re.compile("^struct to_string_returns_value_inner$")
390 ] = ToStringReturnsValueInner
391 pretty_printers_dict[
392 re.compile("^to_string_returns_value_inner$")
393 ] = ToStringReturnsValueInner
394 pretty_printers_dict[
395 re.compile("^struct to_string_returns_value_wrapper$")
396 ] = ToStringReturnsValueWrapper
397 pretty_printers_dict[
398 re.compile("^to_string_returns_value_wrapper$")
399 ] = ToStringReturnsValueWrapper
401 pretty_printers_dict[re.compile("^struct ns$")] = pp_ns
402 pretty_printers_dict[re.compile("^ns$")] = pp_ns
404 pretty_printers_dict[re.compile("^struct lazystring$")] = pp_ls
405 pretty_printers_dict[re.compile("^lazystring$")] = pp_ls
407 pretty_printers_dict[re.compile("^struct outerstruct$")] = pp_outer
408 pretty_printers_dict[re.compile("^outerstruct$")] = pp_outer
410 pretty_printers_dict[re.compile("^struct hint_error$")] = pp_hint_error
411 pretty_printers_dict[re.compile("^hint_error$")] = pp_hint_error
413 pretty_printers_dict[re.compile("^struct children_as_list$")] = pp_children_as_list
414 pretty_printers_dict[re.compile("^children_as_list$")] = pp_children_as_list
416 pretty_printers_dict[re.compile("^memory_error$")] = MemoryErrorString
418 pretty_printers_dict[re.compile("^eval_type_s$")] = pp_eval_type
420 typedefs_pretty_printers_dict[re.compile("^int_type$")] = pp_int_typedef
421 typedefs_pretty_printers_dict[re.compile("^int_type2$")] = pp_int_typedef
422 typedefs_pretty_printers_dict[re.compile("^int_type3$")] = pp_int_typedef3
425 # Dict for struct types with typedefs fully stripped.
426 pretty_printers_dict = {}
427 # Dict for typedef types.
428 typedefs_pretty_printers_dict = {}
430 register_pretty_printers()
431 gdb.pretty_printers.append(lookup_function)
432 gdb.pretty_printers.append(lookup_typedefs_function)