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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
# Pretty-printers for JSID values.
import mozilla.prettyprinters
import mozilla.Root
from mozilla.prettyprinters import pretty_printer
# Forget any printers from previous loads of this module.
mozilla.prettyprinters.clear_module_printers(__name__)
@pretty_printer("JS::PropertyKey")
class PropertyKey(object):
# Since people don't always build with macro debugging info, I can't
# think of any way to avoid copying these values here, short of using
# inferior calls for every operation (which, I hear, is broken from
# pretty-printers in some recent GDBs).
StringTypeTag = 0x0
IntTagBit = 0x1
VoidTypeTag = 0x2
SymbolTypeTag = 0x4
TypeMask = 0x7
def __init__(self, value, cache):
self.value = value
self.cache = cache
self.concrete_type = self.value.type.strip_typedefs()
def to_string(self):
bits = self.value["asBits_"]
tag = bits & PropertyKey.TypeMask
if tag == PropertyKey.StringTypeTag:
body = bits.cast(self.cache.JSString_ptr_t)
elif tag & PropertyKey.IntTagBit:
body = bits >> 1
elif tag == PropertyKey.VoidTypeTag:
return "JS::VoidPropertyKey"
elif tag == PropertyKey.SymbolTypeTag:
body = (bits & ~PropertyKey.TypeMask).cast(self.cache.JSSymbol_ptr_t)
else:
body = "<unrecognized>"
return "$jsid(%s)" % (body,)
@pretty_printer("JS::Rooted<long>")
def RootedPropertyKey(value, cache):
# Hard-code the referent type pretty-printer for PropertyKey roots and
# handles. See the comment for mozilla.Root.Common.__init__.
return mozilla.Root.Rooted(value, cache, PropertyKey)
@pretty_printer("JS::Handle<long>")
def HandlePropertyKey(value, cache):
return mozilla.Root.Handle(value, cache, PropertyKey)
@pretty_printer("JS::MutableHandle<long>")
def MutableHandlePropertyKey(value, cache):
return mozilla.Root.MutableHandle(value, cache, PropertyKey)
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