xref: /openbsd-src/gnu/llvm/lldb/examples/summaries/sp_cp.py (revision 061da546b983eb767bad15e67af1174fb0bcf31c) 
1"""
2Summary and synthetic providers for LLDB-specific shared pointers
3
4Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5See https://llvm.org/LICENSE.txt for license information.
6SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7"""
8
9
10class SharedPtr_SyntheticChildrenProvider:
11
12    def __init__(self, valobj, dict):
13        self.valobj = valobj
14        self.update()
15
16    def update(self):
17        pass
18
19    def num_children(self):
20        return 1
21
22    def get_child_index(self, name):
23        if name == "ptr":
24            return 0
25        if name == "count":
26            return 1
27        return None
28
29    def get_child_at_index(self, index):
30        if index == 0:
31            return self.valobj.GetChildMemberWithName('_M_ptr')
32        if index == 1:
33            return self.valobj.GetChildMemberWithName('_M_refcount').GetChildMemberWithName(
34                '_M_pi').GetChildMemberWithName('_M_use_count')
35        return None
36
37
38def SharedPtr_SummaryProvider(valobj, dict):
39    return 'use = ' + \
40        str(valobj.GetChildMemberWithName("count").GetValueAsUnsigned())
41
42
43class ValueObjectSP_SyntheticChildrenProvider:
44
45    def __init__(self, valobj, dict):
46        self.valobj = valobj
47        self.update()
48
49    def update(self):
50        pass
51
52    def num_children(self):
53        return 1
54
55    def get_child_index(self, name):
56        if name == "ptr":
57            return 0
58        if name == "count":
59            return 1
60        return None
61
62    def get_child_at_index(self, index):
63        if index == 0:
64            return self.valobj.GetChildMemberWithName('ptr_')
65        if index == 1:
66            return self.valobj.GetChildMemberWithName(
67                'cntrl_').GetChildMemberWithName('shared_owners_')
68        return None
69
70
71def ValueObjectSP_SummaryProvider(valobj, dict):
72    return 'use = ' + \
73        str(1 + valobj.GetChildMemberWithName("count").GetValueAsUnsigned())
74
75
76def __lldb_init_module(debugger, dict):
77    debugger.HandleCommand(
78        'type summary add -x ".*ValueObjectSP" --expand -F sp_cp.ValueObjectSP_SummaryProvider')
79    debugger.HandleCommand(
80        'type synthetic add -x ".*ValueObjectSP" -l sp_cp.ValueObjectSP_SyntheticChildrenProvider')
81    debugger.HandleCommand(
82        'type summary add -x ".*SP" --expand -F sp_cp.SharedPtr_SummaryProvider')
83    debugger.HandleCommand(
84        'type synthetic add -x ".*SP" -l sp_cp.SharedPtr_SyntheticChildrenProvider')
85