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# GDB autoload file
import gdb.printing
import sys
# We want to work with both Python 2 and 3
if sys.version_info[0] > 2:
long = int
## Copied from gdb.printing because, having an initial underscore,
## it's probably not a stable interface...
# A helper class for printing enum types. This class is instantiated
# with a list of enumerators to print a particular Value.
class _EnumInstance:
def __init__(self, enumerators, val):
self.enumerators = enumerators
self.val = val
def to_string(self):
flag_list = []
v = long(self.val)
any_found = False
for (e_name, e_value) in self.enumerators:
if v & e_value != 0:
flag_list.append(e_name)
v = v & ~e_value
any_found = True
if not any_found or v != 0:
# Leftover value.
flag_list.append('<unknown: 0x%x>' % v)
return "0x%x [%s]" % (self.val, " | ".join(flag_list))
def is_pow2(x):
# From http://stackoverflow.com/questions/600293/600306
return (x != 0) and ((x & (x - 1)) == 0)
class FlagsPrinter(gdb.printing.PrettyPrinter):
"""Print values of enum types, assuming that every bit is really a
flag, and that other enumerators are just masks/shorthand."""
def __init__(self, enum_type):
super(FlagsPrinter, self).__init__(enum_type)
self.initialized = False
def __call__(self, val):
if not self.initialized:
flags = gdb.lookup_type(self.name)
self.enumerators = [(field.name, field.enumval)
for field in flags.fields()
if is_pow2(field.enumval)]
self.enumerators.sort(key = lambda x: x[1])
self.initialized = True
if self.enabled:
return _EnumInstance(self.enumerators, val)
else:
return None
class NeedLibstdcxxPrinters(Exception):
def __str__(self):
return """Oops!!!
The libstdc++ pretty printers seem to be missing.
See http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug.html for
installation instructions.
(Alternatively, see "help disable pretty-printer" to learn how to
disable the failing printers.)"""
class coord_def_printer:
def __init__(self, val):
self.val = val
def to_string(self):
return "({0[x]}, {0[y]})".format(self.val)
class actor_printer:
"""Print an actor object."""
def __init__(self, val):
self.val = val
def to_string(self):
return "{} #{:#x} at {}".format(
self.val["type"], int(self.val["mid"]), self.val["position"])
class item_def_printer:
def __init__(self, val):
self.val = val
def to_string(self):
return None
def children(self):
# Since C++ hasn't got dependent types, we have to simulate them here.
def f(fname):
return (fname, self.val[fname])
def g(fname, typename):
return (fname, self.val[fname].cast(gdb.lookup_type(typename)))
ty = str(self.val['base_type'])
sub_type_type = {
'OBJ_WEAPONS': 'weapon_type',
'OBJ_MISSILES': 'missile_type',
'OBJ_ARMOUR': 'armour_type',
'OBJ_WANDS': 'wand_type',
'OBJ_FOOD': 'food_type',
'OBJ_SCROLLS': 'scroll_type',
'OBJ_JEWELLERY': 'jewellery_type',
'OBJ_POTIONS': 'potion_type',
'OBJ_BOOKS': 'book_type',
'OBJ_STAVES': 'stave_type',
'OBJ_ORBS': 'orb_type',
'OBJ_MISCELLANY':'misc_item_type',
'OBJ_CORPSES': 'corpse_type',
# 'OBJ_GOLD':
'OBJ_RODS': 'rod_type'
}.get(ty, 'uint8_t')
sub_ty = str(self.val['sub_type'].cast(gdb.lookup_type(sub_type_type)))
yield f('base_type')
yield g('sub_type', sub_type_type)
if ty == 'OBJ_CORPSES' or (ty == 'OBJ_FOOD' and sub_ty == 'FOOD_CHUNK'):
yield f('mon_type')
else:
yield f('plus')
plus2typename = {
('OBJ_ARMOUR', 'ARM_GLOVES'):'gloves_desc_type',
}.get((ty, sub_ty), 'short')
yield g('plus2', plus2typename)
flags = self.val['flags']
is_artefact = bool(flags & gdb.parse_and_eval('ISFLAG_ARTEFACT_MASK'))
is_unrand = bool(flags & gdb.parse_and_eval('ISFLAG_UNRANDART'))
if is_artefact:
if is_unrand:
special_type = 'unrand_type'
else:
special_type = 'int'
else:
special_type = {
'OBJ_WEAPONS': 'brand_type',
'OBJ_MISSILES': 'special_missile_type',
'OBJ_ARMOUR': 'special_armour_type',
}.get(ty, 'int')
yield g('special', special_type)
yield f('colour')
yield f('rnd')
yield f('quantity')
yield g('flags', 'item_status_flag_type')
yield f('pos')
yield f('link')
yield f('slot')
yield f('orig_place')
yield f('orig_monnum')
yield f('inscription')
yield f('props')
class FixedVector_printer:
def __init__(self, val):
self.val = val
def to_string(self):
return self.val['mData']
# Pretty printers for "store.h"
class CrawlHashTable_printer:
def __init__(self, val):
self.val = val
def to_string(self):
return None
def children(self):
if not self.val["hash_map"]:
return ()
vis = gdb.default_visualizer(self.val["hash_map"].dereference())
if vis:
return vis.children()
else:
raise NeedLibstdcxxPrinters
def display_hint(self):
return "map"
class CrawlVector_printer:
def __init__(self, val):
self.val = val
def to_string(self):
return None
def children(self):
if not self.val["vec"]:
return ()
vis = gdb.default_visualizer(self.val["vec"])
if vis:
return vis.children()
else:
raise NeedLibstdcxxPrinters
def display_hint(self):
return "array"
class CrawlStoreValue_printer:
def __init__(self, val):
self.val = val
def to_string(self):
ty = str(self.val['type'])
u = self.val['val']
def phelper(typename):
return u['ptr'].cast(gdb.lookup_type(typename).pointer()).dereference()
if ty == 'SV_NONE': val = '<nothing>'
elif ty == 'SV_BOOL': val = u['boolean']
elif ty == 'SV_BYTE': val = u['byte']
elif ty == 'SV_SHORT': val = u['_short']
elif ty == 'SV_INT': val = u['_int']
elif ty == 'SV_FLOAT': val = u['_float']
elif ty == 'SV_INT64': val = u['_int64']
elif ty == 'SV_STR':
val = phelper('std::basic_string<char, std::char_traits<char>, std::allocator<char> >')
elif ty == 'SV_COORD':
val = phelper('coord_def')
elif ty == 'SV_ITEM':
val = phelper('item_def')
elif ty == 'SV_HASH':
val = phelper('CrawlHashTable')
elif ty == 'SV_VEC':
val = phelper('CrawlVector')
elif ty == 'SV_LEV_ID':
val = phelper('level_id')
elif ty == 'SV_LEV_POS':
val = phelper('level_pos')
elif ty == 'SV_MONST':
val = actor_printer(phelper('monster')).to_string()
elif ty == 'SV_LUA':
val = phelper('dlua_chunk')
else:
raise "Unknown type: %s" % ty
# return '[%s] %s' % (ty, val)
return val
def build_pretty_printer():
pp = gdb.printing.RegexpCollectionPrettyPrinter("crawl")
pp.add_printer('coord_def', '^coord_def$', coord_def_printer)
# pp.add_printer('actor', '^actor$', actor_printer)
pp.add_printer('item_def', '^item_def$', item_def_printer)
pp.add_printer('FixedVector', '^FixedVector<.*>$', FixedVector_printer)
pp.add_printer('FixedArray', '^FixedArray<.*>$', FixedVector_printer)
pp.add_printer('CrawlHashTable', '^CrawlHashTable$', CrawlHashTable_printer)
pp.add_printer('CrawlVector', '^CrawlVector$', CrawlVector_printer)
pp.add_printer('CrawlStoreValue', '^CrawlStoreValue$', CrawlStoreValue_printer)
# XXX we really want to set this printer on iflags_t, but that doesn't work
pp.add_printer('item_status_flag_type', '^item_status_flag_type$',
FlagsPrinter('item_status_flag_type'))
return pp
gdb.printing.register_pretty_printer(
gdb.current_objfile(),
build_pretty_printer())
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