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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
//===-- NSException.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
#include "clang/AST/DeclCXX.h"
// Project includes
#include "Cocoa.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ProcessStructReader.h"
#include "Plugins/Language/ObjC/NSString.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
bool
lldb_private::formatters::NSException_SummaryProvider (ValueObject& valobj, Stream& stream, const TypeSummaryOptions& options)
{
ProcessSP process_sp(valobj.GetProcessSP());
if (!process_sp)
return false;
lldb::addr_t ptr_value = LLDB_INVALID_ADDRESS;
CompilerType valobj_type(valobj.GetCompilerType());
Flags type_flags(valobj_type.GetTypeInfo());
if (type_flags.AllClear(eTypeHasValue))
{
if (valobj.IsBaseClass() && valobj.GetParent())
ptr_value = valobj.GetParent()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
}
else
ptr_value = valobj.GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
if (ptr_value == LLDB_INVALID_ADDRESS)
return false;
size_t ptr_size = process_sp->GetAddressByteSize();
lldb::addr_t name_location = ptr_value + 1 * ptr_size;
lldb::addr_t reason_location = ptr_value + 2 * ptr_size;
Error error;
lldb::addr_t name = process_sp->ReadPointerFromMemory(name_location, error);
if (error.Fail() || name == LLDB_INVALID_ADDRESS)
return false;
lldb::addr_t reason = process_sp->ReadPointerFromMemory(reason_location, error);
if (error.Fail() || reason == LLDB_INVALID_ADDRESS)
return false;
InferiorSizedWord name_isw(name, *process_sp);
InferiorSizedWord reason_isw(reason, *process_sp);
CompilerType voidstar = process_sp->GetTarget().GetScratchClangASTContext()->GetBasicType(lldb::eBasicTypeVoid).GetPointerType();
ValueObjectSP name_sp = ValueObject::CreateValueObjectFromData("name_str", name_isw.GetAsData(process_sp->GetByteOrder()), valobj.GetExecutionContextRef(), voidstar);
ValueObjectSP reason_sp = ValueObject::CreateValueObjectFromData("reason_str", reason_isw.GetAsData(process_sp->GetByteOrder()), valobj.GetExecutionContextRef(), voidstar);
if (!name_sp || !reason_sp)
return false;
StreamString name_str_summary;
StreamString reason_str_summary;
if (NSStringSummaryProvider(*name_sp, name_str_summary, options) &&
NSStringSummaryProvider(*reason_sp, reason_str_summary, options) &&
!name_str_summary.Empty() &&
!reason_str_summary.Empty())
{
stream.Printf("name: %s - reason: %s", name_str_summary.GetData(), reason_str_summary.GetData());
return true;
}
else
return false;
}
class NSExceptionSyntheticFrontEnd : public SyntheticChildrenFrontEnd
{
public:
NSExceptionSyntheticFrontEnd (lldb::ValueObjectSP valobj_sp) :
SyntheticChildrenFrontEnd(*valobj_sp)
{}
~NSExceptionSyntheticFrontEnd() override = default;
// no need to delete m_child_ptr - it's kept alive by the cluster manager on our behalf
size_t
CalculateNumChildren() override
{
if (m_child_ptr)
return 1;
if (m_child_sp)
return 1;
return 0;
}
lldb::ValueObjectSP
GetChildAtIndex(size_t idx) override
{
if (idx != 0)
return lldb::ValueObjectSP();
if (m_child_ptr)
return m_child_ptr->GetSP();
return m_child_sp;
}
bool
Update() override
{
m_child_ptr = nullptr;
m_child_sp.reset();
ProcessSP process_sp(m_backend.GetProcessSP());
if (!process_sp)
return false;
lldb::addr_t userinfo_location = LLDB_INVALID_ADDRESS;
CompilerType valobj_type(m_backend.GetCompilerType());
Flags type_flags(valobj_type.GetTypeInfo());
if (type_flags.AllClear(eTypeHasValue))
{
if (m_backend.IsBaseClass() && m_backend.GetParent())
userinfo_location = m_backend.GetParent()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
}
else
userinfo_location = m_backend.GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
if (userinfo_location == LLDB_INVALID_ADDRESS)
return false;
size_t ptr_size = process_sp->GetAddressByteSize();
userinfo_location += 3 * ptr_size;
Error error;
lldb::addr_t userinfo = process_sp->ReadPointerFromMemory(userinfo_location, error);
if (userinfo == LLDB_INVALID_ADDRESS || error.Fail())
return false;
InferiorSizedWord isw(userinfo,*process_sp);
m_child_sp = ValueObject::CreateValueObjectFromData("userInfo",
isw.GetAsData(process_sp->GetByteOrder()),
m_backend.GetExecutionContextRef(),
process_sp->GetTarget().GetScratchClangASTContext()->GetBasicType(lldb::eBasicTypeObjCID));
return false;
}
bool
MightHaveChildren() override
{
return true;
}
size_t
GetIndexOfChildWithName(const ConstString &name) override
{
static ConstString g___userInfo("userInfo");
if (name == g___userInfo)
return 0;
return UINT32_MAX;
}
private:
// the child here can be "real" (i.e. an actual child of the root) or synthetized from raw memory
// if the former, I need to store a plain pointer to it - or else a loop of references will cause this entire hierarchy of values to leak
// if the latter, then I need to store a SharedPointer to it - so that it only goes away when everyone else in the cluster goes away
// oh joy!
ValueObject* m_child_ptr;
ValueObjectSP m_child_sp;
};
SyntheticChildrenFrontEnd*
lldb_private::formatters::NSExceptionSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
{
lldb::ProcessSP process_sp (valobj_sp->GetProcessSP());
if (!process_sp)
return nullptr;
ObjCLanguageRuntime *runtime = (ObjCLanguageRuntime*)process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC);
if (!runtime)
return nullptr;
ObjCLanguageRuntime::ClassDescriptorSP descriptor(runtime->GetClassDescriptor(*valobj_sp.get()));
if (!descriptor.get() || !descriptor->IsValid())
return nullptr;
const char* class_name = descriptor->GetClassName().GetCString();
if (!class_name || !*class_name)
return nullptr;
if (!strcmp(class_name,"NSException"))
return (new NSExceptionSyntheticFrontEnd(valobj_sp));
else if (!strcmp(class_name,"NSCFException"))
return (new NSExceptionSyntheticFrontEnd(valobj_sp));
else if (!strcmp(class_name,"__NSCFException"))
return (new NSExceptionSyntheticFrontEnd(valobj_sp));
return nullptr;
}
|
