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
|
//===-- NSException.cpp ---------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclCXX.h"
#include "Cocoa.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/Target/ProcessStructReader.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/Endian.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/Stream.h"
#include "Plugins/Language/ObjC/NSString.h"
#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
static bool ExtractFields(ValueObject &valobj, ValueObjectSP *name_sp,
ValueObjectSP *reason_sp, ValueObjectSP *userinfo_sp,
ValueObjectSP *reserved_sp) {
ProcessSP process_sp(valobj.GetProcessSP());
if (!process_sp)
return false;
lldb::addr_t ptr = 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 = valobj.GetParent()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
} else {
ptr = valobj.GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
}
if (ptr == LLDB_INVALID_ADDRESS)
return false;
size_t ptr_size = process_sp->GetAddressByteSize();
Status error;
auto name = process_sp->ReadPointerFromMemory(ptr + 1 * ptr_size, error);
if (error.Fail() || name == LLDB_INVALID_ADDRESS)
return false;
auto reason = process_sp->ReadPointerFromMemory(ptr + 2 * ptr_size, error);
if (error.Fail() || reason == LLDB_INVALID_ADDRESS)
return false;
auto userinfo = process_sp->ReadPointerFromMemory(ptr + 3 * ptr_size, error);
if (error.Fail() || userinfo == LLDB_INVALID_ADDRESS)
return false;
auto reserved = process_sp->ReadPointerFromMemory(ptr + 4 * ptr_size, error);
if (error.Fail() || reserved == LLDB_INVALID_ADDRESS)
return false;
InferiorSizedWord name_isw(name, *process_sp);
InferiorSizedWord reason_isw(reason, *process_sp);
InferiorSizedWord userinfo_isw(userinfo, *process_sp);
InferiorSizedWord reserved_isw(reserved, *process_sp);
auto *clang_ast_context = TypeSystemClang::GetScratch(process_sp->GetTarget());
if (!clang_ast_context)
return false;
CompilerType voidstar =
clang_ast_context->GetBasicType(lldb::eBasicTypeVoid).GetPointerType();
if (name_sp)
*name_sp = ValueObject::CreateValueObjectFromData(
"name", name_isw.GetAsData(process_sp->GetByteOrder()),
valobj.GetExecutionContextRef(), voidstar);
if (reason_sp)
*reason_sp = ValueObject::CreateValueObjectFromData(
"reason", reason_isw.GetAsData(process_sp->GetByteOrder()),
valobj.GetExecutionContextRef(), voidstar);
if (userinfo_sp)
*userinfo_sp = ValueObject::CreateValueObjectFromData(
"userInfo", userinfo_isw.GetAsData(process_sp->GetByteOrder()),
valobj.GetExecutionContextRef(), voidstar);
if (reserved_sp)
*reserved_sp = ValueObject::CreateValueObjectFromData(
"reserved", reserved_isw.GetAsData(process_sp->GetByteOrder()),
valobj.GetExecutionContextRef(), voidstar);
return true;
}
bool lldb_private::formatters::NSException_SummaryProvider(
ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
lldb::ValueObjectSP reason_sp;
if (!ExtractFields(valobj, nullptr, &reason_sp, nullptr, nullptr))
return false;
if (!reason_sp) {
stream.Printf("No reason");
return false;
}
StreamString reason_str_summary;
if (NSStringSummaryProvider(*reason_sp, reason_str_summary, options) &&
!reason_str_summary.Empty()) {
stream.Printf("%s", 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;
size_t CalculateNumChildren() override {
return 4;
}
lldb::ValueObjectSP GetChildAtIndex(size_t idx) override {
switch (idx) {
case 0: return m_name_sp;
case 1: return m_reason_sp;
case 2: return m_userinfo_sp;
case 3: return m_reserved_sp;
}
return lldb::ValueObjectSP();
}
bool Update() override {
m_name_sp.reset();
m_reason_sp.reset();
m_userinfo_sp.reset();
m_reserved_sp.reset();
return ExtractFields(m_backend, &m_name_sp, &m_reason_sp, &m_userinfo_sp,
&m_reserved_sp);
}
bool MightHaveChildren() override { return true; }
size_t GetIndexOfChildWithName(ConstString name) override {
// NSException has 4 members:
// NSString *name;
// NSString *reason;
// NSDictionary *userInfo;
// id reserved;
static ConstString g___name("name");
static ConstString g___reason("reason");
static ConstString g___userInfo("userInfo");
static ConstString g___reserved("reserved");
if (name == g___name) return 0;
if (name == g___reason) return 1;
if (name == g___userInfo) return 2;
if (name == g___reserved) return 3;
return UINT32_MAX;
}
private:
ValueObjectSP m_name_sp;
ValueObjectSP m_reason_sp;
ValueObjectSP m_userinfo_sp;
ValueObjectSP m_reserved_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::Get(*process_sp);
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;
}
|
