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
|
//===-- GoFormatterFunctions.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
#include <map>
// Other libraries and framework includes
// Project includes
#include "GoFormatterFunctions.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
#include "lldb/DataFormatters/StringPrinter.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;
namespace {
class GoSliceSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
GoSliceSyntheticFrontEnd(ValueObject &valobj)
: SyntheticChildrenFrontEnd(valobj) {
Update();
}
~GoSliceSyntheticFrontEnd() override = default;
size_t CalculateNumChildren() override { return m_len; }
lldb::ValueObjectSP GetChildAtIndex(size_t idx) override {
if (idx < m_len) {
ValueObjectSP &cached = m_children[idx];
if (!cached) {
StreamString idx_name;
idx_name.Printf("[%" PRIu64 "]", (uint64_t)idx);
lldb::addr_t object_at_idx = m_base_data_address;
object_at_idx += idx * m_type.GetByteSize(nullptr);
cached = CreateValueObjectFromAddress(
idx_name.GetString(), object_at_idx,
m_backend.GetExecutionContextRef(), m_type);
}
return cached;
}
return ValueObjectSP();
}
bool Update() override {
size_t old_count = m_len;
ConstString array_const_str("array");
ValueObjectSP array_sp =
m_backend.GetChildMemberWithName(array_const_str, true);
if (!array_sp) {
m_children.clear();
return old_count == 0;
}
m_type = array_sp->GetCompilerType().GetPointeeType();
m_base_data_address = array_sp->GetPointerValue();
ConstString len_const_str("len");
ValueObjectSP len_sp =
m_backend.GetChildMemberWithName(len_const_str, true);
if (len_sp) {
m_len = len_sp->GetValueAsUnsigned(0);
m_children.clear();
}
return old_count == m_len;
}
bool MightHaveChildren() override { return true; }
size_t GetIndexOfChildWithName(const ConstString &name) override {
return ExtractIndexFromString(name.AsCString());
}
private:
CompilerType m_type;
lldb::addr_t m_base_data_address;
size_t m_len;
std::map<size_t, lldb::ValueObjectSP> m_children;
};
} // anonymous namespace
bool lldb_private::formatters::GoStringSummaryProvider(
ValueObject &valobj, Stream &stream, const TypeSummaryOptions &opts) {
ProcessSP process_sp = valobj.GetProcessSP();
if (!process_sp)
return false;
if (valobj.IsPointerType()) {
Status err;
ValueObjectSP deref = valobj.Dereference(err);
if (!err.Success())
return false;
return GoStringSummaryProvider(*deref, stream, opts);
}
ConstString str_name("str");
ConstString len_name("len");
ValueObjectSP data_sp = valobj.GetChildMemberWithName(str_name, true);
ValueObjectSP len_sp = valobj.GetChildMemberWithName(len_name, true);
if (!data_sp || !len_sp)
return false;
bool success;
lldb::addr_t valobj_addr = data_sp->GetValueAsUnsigned(0, &success);
if (!success)
return false;
uint64_t length = len_sp->GetValueAsUnsigned(0);
if (length == 0) {
stream.Printf("\"\"");
return true;
}
StringPrinter::ReadStringAndDumpToStreamOptions options(valobj);
options.SetLocation(valobj_addr);
options.SetProcessSP(process_sp);
options.SetStream(&stream);
options.SetSourceSize(length);
options.SetNeedsZeroTermination(false);
options.SetLanguage(eLanguageTypeGo);
if (!StringPrinter::ReadStringAndDumpToStream<
StringPrinter::StringElementType::UTF8>(options)) {
stream.Printf("Summary Unavailable");
return true;
}
return true;
}
SyntheticChildrenFrontEnd *
lldb_private::formatters::GoSliceSyntheticFrontEndCreator(
CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
if (!valobj_sp)
return nullptr;
lldb::ProcessSP process_sp(valobj_sp->GetProcessSP());
if (!process_sp)
return nullptr;
return new GoSliceSyntheticFrontEnd(*valobj_sp);
}
|
