js/src/gdb/mozilla/JSString.py@6474c204b198 (annotated)
js/src/gdb/mozilla/JSString.py
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | # Pretty-printers for SpiderMonkey strings. |
| michael@0 | 2 | |
| michael@0 | 3 | import gdb |
| michael@0 | 4 | import mozilla.prettyprinters |
| michael@0 | 5 | from mozilla.prettyprinters import pretty_printer, ptr_pretty_printer |
| michael@0 | 6 | |
| michael@0 | 7 | # Forget any printers from previous loads of this module. |
| michael@0 | 8 | mozilla.prettyprinters.clear_module_printers(__name__) |
| michael@0 | 9 | |
| michael@0 | 10 | # Cache information about the JSString type for this objfile. |
| michael@0 | 11 | class JSStringTypeCache(object): |
| michael@0 | 12 | def __init__(self, cache): |
| michael@0 | 13 | dummy = gdb.Value(0).cast(cache.JSString_ptr_t) |
| michael@0 | 14 | self.LENGTH_SHIFT = dummy['LENGTH_SHIFT'] |
| michael@0 | 15 | self.FLAGS_MASK = dummy['FLAGS_MASK'] |
| michael@0 | 16 | self.ROPE_FLAGS = dummy['ROPE_FLAGS'] |
| michael@0 | 17 | self.ATOM_BIT = dummy['ATOM_BIT'] |
| michael@0 | 18 | |
| michael@0 | 19 | class Common(mozilla.prettyprinters.Pointer): |
| michael@0 | 20 | def __init__(self, value, cache): |
| michael@0 | 21 | super(Common, self).__init__(value, cache) |
| michael@0 | 22 | if not cache.mod_JSString: |
| michael@0 | 23 | cache.mod_JSString = JSStringTypeCache(cache) |
| michael@0 | 24 | self.stc = cache.mod_JSString |
| michael@0 | 25 | |
| michael@0 | 26 | @ptr_pretty_printer("JSString") |
| michael@0 | 27 | class JSStringPtr(Common): |
| michael@0 | 28 | def display_hint(self): |
| michael@0 | 29 | return "string" |
| michael@0 | 30 | |
| michael@0 | 31 | def jschars(self): |
| michael@0 | 32 | d = self.value['d'] |
| michael@0 | 33 | lengthAndFlags = d['lengthAndFlags'] |
| michael@0 | 34 | length = lengthAndFlags >> self.stc.LENGTH_SHIFT |
| michael@0 | 35 | is_rope = (lengthAndFlags & self.stc.FLAGS_MASK) == self.stc.ROPE_FLAGS |
| michael@0 | 36 | if is_rope: |
| michael@0 | 37 | for c in JSStringPtr(d['u1']['left'], self.cache).jschars(): |
| michael@0 | 38 | yield c |
| michael@0 | 39 | for c in JSStringPtr(d['s']['u2']['right'], self.cache).jschars(): |
| michael@0 | 40 | yield c |
| michael@0 | 41 | else: |
| michael@0 | 42 | chars = d['u1']['chars'] |
| michael@0 | 43 | for i in xrange(length): |
| michael@0 | 44 | yield chars[i] |
| michael@0 | 45 | |
| michael@0 | 46 | def to_string(self): |
| michael@0 | 47 | s = u'' |
| michael@0 | 48 | for c in self.jschars(): |
| michael@0 | 49 | s += unichr(c) |
| michael@0 | 50 | return s |
| michael@0 | 51 | |
| michael@0 | 52 | @ptr_pretty_printer("JSAtom") |
| michael@0 | 53 | class JSAtomPtr(Common): |
| michael@0 | 54 | def to_string(self): |
| michael@0 | 55 | return self.value.cast(self.cache.JSString_ptr_t) |
