authorgravatar for 14938807+xackus@users.noreply.github.comxackus <14938807+xackus@users.noreply.github.com> 2020-11-23 00:19:18+01:00
committergravatar for git@vexu.euVeikka Tuominen <git@vexu.eu> 2020-12-23 20:21:47+02:00
log0a6ba6f666e51eee612b97628e2488a0fdb18210
tree597b840f10f57cd9aa36a6611c6aea80b02440af
parent49ca51fc3ac35ee3ab25cdad9747c9c0719ffe5e

gdb pretty printers for slices and optionals

2 files changed, 65 insertions(+), 1 deletions(-)

tools/zig-gdb.py+1-1
...@@ -31,7 +31,7 @@ class BufPrinter:...@@ -31,7 +31,7 @@ class BufPrinter:
31 def display_hint(self):31 def display_hint(self):
32 return 'string'32 return 'string'
3333
34pp = gdb.printing.RegexpCollectionPrettyPrinter('zig')34pp = gdb.printing.RegexpCollectionPrettyPrinter('Zig stage1 compiler')
35pp.add_printer('Buf', '^Buf$', BufPrinter)35pp.add_printer('Buf', '^Buf$', BufPrinter)
36pp.add_printer('ZigList<char>', '^ZigList<char>$', BufPrinter)36pp.add_printer('ZigList<char>', '^ZigList<char>$', BufPrinter)
37pp.add_printer('ZigList', '^ZigList<.*>$', ZigListPrinter)37pp.add_printer('ZigList', '^ZigList<.*>$', ZigListPrinter)
tools/zig_gdb_pretty_printers.py created+64
...@@ -0,0 +1,64 @@
1# gdb pretty printers for Zig language constructs
2
3import gdb.printing
4
5class 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
21class 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
38class 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
48class 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
64gdb.printing.register_pretty_printer(gdb.current_objfile(), ZigPrettyPrinter())