65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
# gdb pretty printers for Zig language constructs
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import gdb.printing
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class ZigPrettyPrinter(gdb.printing.PrettyPrinter):
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def __init__(self):
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super().__init__('Zig')
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def __call__(self, val):
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tag = val.type.tag
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if(tag is None):
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return None
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if(tag == '[]u8'):
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return StringPrinter(val)
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if(tag.startswith('[]')):
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return SlicePrinter(val)
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if(tag.startswith('?')):
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return OptionalPrinter(val)
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return None
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class SlicePrinter:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return f"{self.val['len']} items at {self.val['ptr']}"
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def children(self):
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def it(val):
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for i in range(int(val['len'])):
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item = val['ptr'] + i
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yield (f'[{i}]', item.dereference())
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return it(self.val)
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def display_hint(self):
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return 'array'
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class StringPrinter:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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return self.val['ptr'].string(length=int(self.val['len']))
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def display_hint(self):
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return 'string'
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class OptionalPrinter:
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def __init__(self, val):
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self.val = val
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def to_string(self):
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if(self.val['maybe']):
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return None # printed by children()
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else:
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return 'null'
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def children(self):
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def it(val):
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if(val['maybe']):
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yield ('payload', val['val'])
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return it(self.val)
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gdb.printing.register_pretty_printer(gdb.current_objfile(), ZigPrettyPrinter())
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