The Tor Browser / file comparison
comparison: js/src/gdb/mozilla/JSObject.py
js/src/gdb/mozilla/JSObject.py
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:b254acdc9562 |
|---|---|
| 1 # Pretty-printers for SpiderMonkey JSObjects. | |
| 2 | |
| 3 import gdb | |
| 4 import mozilla.JSString | |
| 5 import mozilla.prettyprinters as prettyprinters | |
| 6 from mozilla.prettyprinters import ptr_pretty_printer, ref_pretty_printer | |
| 7 from mozilla.Root import deref | |
| 8 | |
| 9 prettyprinters.clear_module_printers(__name__) | |
| 10 | |
| 11 class JSObjectTypeCache(object): | |
| 12 def __init__(self, value, cache): | |
| 13 # In GDB 7.4.50, with some programs, this first dummy gdb.lookup_type | |
| 14 # call is required to make the second lookup_type call succeed. A GDB | |
| 15 # built from the public sources as of 2012-12-12 did not require the | |
| 16 # dummy lookup. | |
| 17 gdb.lookup_type('js::BaseShape') | |
| 18 baseshape_flags = gdb.lookup_type('js::BaseShape::Flag') | |
| 19 self.flag_DELEGATE = prettyprinters.enum_value(baseshape_flags, 'js::BaseShape::DELEGATE') | |
| 20 self.func_ptr_type = gdb.lookup_type('JSFunction').pointer() | |
| 21 | |
| 22 # There should be no need to register this for JSFunction as well, since we | |
| 23 # search for pretty-printers under the names of base classes, and | |
| 24 # JSFunction has JSObject as a base class. | |
| 25 | |
| 26 @ptr_pretty_printer('JSObject') | |
| 27 class JSObjectPtrOrRef(prettyprinters.Pointer): | |
| 28 def __init__(self, value, cache): | |
| 29 super(JSObjectPtrOrRef, self).__init__(value, cache) | |
| 30 if not cache.mod_JSObject: | |
| 31 cache.mod_JSObject = JSObjectTypeCache(value, cache) | |
| 32 self.otc = cache.mod_JSObject | |
| 33 | |
| 34 def summary(self): | |
| 35 shape = deref(self.value['shape_']) | |
| 36 baseshape = deref(shape['base_']) | |
| 37 otype = deref(self.value['type_']) | |
| 38 class_name = otype['clasp_']['name'].string() | |
| 39 flags = baseshape['flags'] | |
| 40 is_delegate = bool(flags & self.otc.flag_DELEGATE) | |
| 41 name = None | |
| 42 if class_name == 'Function': | |
| 43 function = self.value | |
| 44 concrete_type = function.type.strip_typedefs() | |
| 45 if concrete_type.code == gdb.TYPE_CODE_REF: | |
| 46 function = function.address | |
| 47 function = function.cast(self.otc.func_ptr_type) | |
| 48 atom = deref(function['atom_']) | |
| 49 name = str(atom) if atom else '<unnamed>' | |
| 50 return '[object %s%s]%s' % (class_name, | |
| 51 ' ' + name if name else '', | |
| 52 ' delegate' if is_delegate else '') | |
| 53 | |
| 54 @ref_pretty_printer('JSObject') | |
| 55 def JSObjectRef(value, cache): return JSObjectPtrOrRef(value, cache) |
