| ... | ... | @@ -0,0 +1,64 @@ |
| 1 | # gdb pretty printers for Zig language constructs |
| 2 | |
| 3 | import gdb.printing |
| 4 | |
| 5 | class ZigPrettyPrinter(gdb.printing.PrettyPrinter): |
| 6 | def __init__(self): |
| 7 | super().__init__('Zig') |
| 8 | |
| 9 | def __call__(self, val): |
| 10 | tag = val.type.tag |
| 11 | if(tag is None): |
| 12 | return None |
| 13 | if(tag == '[]u8'): |
| 14 | return StringPrinter(val) |
| 15 | if(tag.startswith('[]')): |
| 16 | return SlicePrinter(val) |
| 17 | if(tag.startswith('?')): |
| 18 | return OptionalPrinter(val) |
| 19 | return None |
| 20 | |
| 21 | class SlicePrinter: |
| 22 | def __init__(self, val): |
| 23 | self.val = val |
| 24 | |
| 25 | def to_string(self): |
| 26 | return f"{self.val['len']} items at {self.val['ptr']}" |
| 27 | |
| 28 | def children(self): |
| 29 | def it(val): |
| 30 | for i in range(int(val['len'])): |
| 31 | item = val['ptr'] + i |
| 32 | yield (f'[{i}]', item.dereference()) |
| 33 | return it(self.val) |
| 34 | |
| 35 | def display_hint(self): |
| 36 | return 'array' |
| 37 | |
| 38 | class StringPrinter: |
| 39 | def __init__(self, val): |
| 40 | self.val = val |
| 41 | |
| 42 | def to_string(self): |
| 43 | return self.val['ptr'].string(length=int(self.val['len'])) |
| 44 | |
| 45 | def display_hint(self): |
| 46 | return 'string' |
| 47 | |
| 48 | class OptionalPrinter: |
| 49 | def __init__(self, val): |
| 50 | self.val = val |
| 51 | |
| 52 | def to_string(self): |
| 53 | if(self.val['maybe']): |
| 54 | return None # printed by children() |
| 55 | else: |
| 56 | return 'null' |
| 57 | |
| 58 | def children(self): |
| 59 | def it(val): |
| 60 | if(val['maybe']): |
| 61 | yield ('payload', val['val']) |
| 62 | return it(self.val) |
| 63 | |
| 64 | gdb.printing.register_pretty_printer(gdb.current_objfile(), ZigPrettyPrinter()) |
xackus <14938807+xackus@users.noreply.github.com> 2020-11-23 00:19:18+01:00
Veikka Tuominen <git@vexu.eu> 2020-12-23 20:21:47+02:00