js/src/gdb/mozilla/JSObject.py@a63d609f5ebe (annotated)
js/src/gdb/mozilla/JSObject.py
Thu, 15 Jan 2015 15:55:04 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:55:04 +0100
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
- permissions
- -rw-r--r--
Back out 97036ab72558 which inappropriately compared turds to third parties.
| michael@0 | 1 | # Pretty-printers for SpiderMonkey JSObjects. |
| michael@0 | 2 | |
| michael@0 | 3 | import gdb |
| michael@0 | 4 | import mozilla.JSString |
| michael@0 | 5 | import mozilla.prettyprinters as prettyprinters |
| michael@0 | 6 | from mozilla.prettyprinters import ptr_pretty_printer, ref_pretty_printer |
| michael@0 | 7 | from mozilla.Root import deref |
| michael@0 | 8 | |
| michael@0 | 9 | prettyprinters.clear_module_printers(__name__) |
| michael@0 | 10 | |
| michael@0 | 11 | class JSObjectTypeCache(object): |
| michael@0 | 12 | def __init__(self, value, cache): |
| michael@0 | 13 | # In GDB 7.4.50, with some programs, this first dummy gdb.lookup_type |
| michael@0 | 14 | # call is required to make the second lookup_type call succeed. A GDB |
| michael@0 | 15 | # built from the public sources as of 2012-12-12 did not require the |
| michael@0 | 16 | # dummy lookup. |
| michael@0 | 17 | gdb.lookup_type('js::BaseShape') |
| michael@0 | 18 | baseshape_flags = gdb.lookup_type('js::BaseShape::Flag') |
| michael@0 | 19 | self.flag_DELEGATE = prettyprinters.enum_value(baseshape_flags, 'js::BaseShape::DELEGATE') |
| michael@0 | 20 | self.func_ptr_type = gdb.lookup_type('JSFunction').pointer() |
| michael@0 | 21 | |
| michael@0 | 22 | # There should be no need to register this for JSFunction as well, since we |
| michael@0 | 23 | # search for pretty-printers under the names of base classes, and |
| michael@0 | 24 | # JSFunction has JSObject as a base class. |
| michael@0 | 25 | |
| michael@0 | 26 | @ptr_pretty_printer('JSObject') |
| michael@0 | 27 | class JSObjectPtrOrRef(prettyprinters.Pointer): |
| michael@0 | 28 | def __init__(self, value, cache): |
| michael@0 | 29 | super(JSObjectPtrOrRef, self).__init__(value, cache) |
| michael@0 | 30 | if not cache.mod_JSObject: |
| michael@0 | 31 | cache.mod_JSObject = JSObjectTypeCache(value, cache) |
| michael@0 | 32 | self.otc = cache.mod_JSObject |
| michael@0 | 33 | |
| michael@0 | 34 | def summary(self): |
| michael@0 | 35 | shape = deref(self.value['shape_']) |
| michael@0 | 36 | baseshape = deref(shape['base_']) |
| michael@0 | 37 | otype = deref(self.value['type_']) |
| michael@0 | 38 | class_name = otype['clasp_']['name'].string() |
| michael@0 | 39 | flags = baseshape['flags'] |
| michael@0 | 40 | is_delegate = bool(flags & self.otc.flag_DELEGATE) |
| michael@0 | 41 | name = None |
| michael@0 | 42 | if class_name == 'Function': |
| michael@0 | 43 | function = self.value |
| michael@0 | 44 | concrete_type = function.type.strip_typedefs() |
| michael@0 | 45 | if concrete_type.code == gdb.TYPE_CODE_REF: |
| michael@0 | 46 | function = function.address |
| michael@0 | 47 | function = function.cast(self.otc.func_ptr_type) |
| michael@0 | 48 | atom = deref(function['atom_']) |
| michael@0 | 49 | name = str(atom) if atom else '<unnamed>' |
| michael@0 | 50 | return '[object %s%s]%s' % (class_name, |
| michael@0 | 51 | ' ' + name if name else '', |
| michael@0 | 52 | ' delegate' if is_delegate else '') |
| michael@0 | 53 | |
| michael@0 | 54 | @ref_pretty_printer('JSObject') |
| michael@0 | 55 | def JSObjectRef(value, cache): return JSObjectPtrOrRef(value, cache) |
