1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
"""
LLDB AppKit formatters
part of The LLVM Compiler Infrastructure
This file is distributed under the University of Illinois Open Source
License. See LICENSE.TXT for details.
"""
# example summary provider for NSMachPort
# the real summary is now C++ code built into LLDB
import lldb
import ctypes
import lldb.runtime.objc.objc_runtime
import lldb.formatters.metrics
import lldb.formatters.Logger
statistics = lldb.formatters.metrics.Metrics()
statistics.add_metric('invalid_isa')
statistics.add_metric('invalid_pointer')
statistics.add_metric('unknown_class')
statistics.add_metric('code_notrun')
# despite the similary to synthetic children providers, these classes are not
# trying to provide anything but the port number of an NSMachPort, so they need not
# obey the interface specification for synthetic children providers
class NSMachPortKnown_SummaryProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, params):
logger = lldb.formatters.Logger.Logger()
self.valobj = valobj
self.sys_params = params
if not(self.sys_params.types_cache.NSUInteger):
if self.sys_params.is_64_bit:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedLong)
else:
self.sys_params.types_cache.NSUInteger = self.valobj.GetType(
).GetBasicType(lldb.eBasicTypeUnsignedInt)
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
# one pointer is the ISA
# then we have one other internal pointer, plus
# 4 bytes worth of flags. hence, these values
def offset(self):
logger = lldb.formatters.Logger.Logger()
if self.sys_params.is_64_bit:
return 20
else:
return 12
def port(self):
logger = lldb.formatters.Logger.Logger()
vport = self.valobj.CreateChildAtOffset(
"port", self.offset(), self.sys_params.types_cache.NSUInteger)
return vport.GetValueAsUnsigned(0)
class NSMachPortUnknown_SummaryProvider:
def adjust_for_architecture(self):
pass
def __init__(self, valobj, params):
logger = lldb.formatters.Logger.Logger()
self.valobj = valobj
self.sys_params = params
self.update()
def update(self):
logger = lldb.formatters.Logger.Logger()
self.adjust_for_architecture()
def port(self):
logger = lldb.formatters.Logger.Logger()
stream = lldb.SBStream()
self.valobj.GetExpressionPath(stream)
num_children_vo = self.valobj.CreateValueFromExpression(
"port", "(int)[" + stream.GetData() + " machPort]")
if num_children_vo.IsValid():
return num_children_vo.GetValueAsUnsigned(0)
return '<variable is not NSMachPort>'
def GetSummary_Impl(valobj):
logger = lldb.formatters.Logger.Logger()
global statistics
class_data, wrapper = lldb.runtime.objc.objc_runtime.Utilities.prepare_class_detection(
valobj, statistics)
if wrapper:
return wrapper
name_string = class_data.class_name()
logger >> "class name is: " + str(name_string)
if name_string == 'NSMachPort':
wrapper = NSMachPortKnown_SummaryProvider(
valobj, class_data.sys_params)
statistics.metric_hit('code_notrun', valobj)
else:
wrapper = NSMachPortUnknown_SummaryProvider(
valobj, class_data.sys_params)
statistics.metric_hit(
'unknown_class',
valobj.GetName() +
" seen as " +
name_string)
return wrapper
def NSMachPort_SummaryProvider(valobj, dict):
logger = lldb.formatters.Logger.Logger()
provider = GetSummary_Impl(valobj)
if provider is not None:
if isinstance(
provider,
lldb.runtime.objc.objc_runtime.SpecialSituation_Description):
return provider.message()
try:
summary = provider.port()
except:
summary = None
logger >> "got summary " + str(summary)
if summary is None:
summary = '<variable is not NSMachPort>'
if isinstance(summary, basestring):
return summay
return 'mach port: ' + str(summary)
return 'Summary Unavailable'
def __lldb_init_module(debugger, dict):
debugger.HandleCommand(
"type summary add -F NSMachPort.NSMachPort_SummaryProvider NSMachPort")
|
