LLDB mainline
SBValueList.h
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1//===-- SBValueList.h -------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLDB_API_SBVALUELIST_H
10#define LLDB_API_SBVALUELIST_H
11
12#include "lldb/API/SBDefines.h"
13
14class ValueListImpl;
15
16namespace lldb {
17
19public:
21
23
25
26 explicit operator bool() const;
27
28 bool IsValid() const;
29
30 void Clear();
31
32 void Append(const lldb::SBValue &val_obj);
33
34 void Append(const lldb::SBValueList &value_list);
35
36 uint32_t GetSize() const;
37
38 lldb::SBValue GetValueAtIndex(uint32_t idx) const;
39
40 lldb::SBValue GetFirstValueByName(const char *name) const;
41
42 lldb::SBValue FindValueObjectByUID(lldb::user_id_t uid);
43
44 const lldb::SBValueList &operator=(const lldb::SBValueList &rhs);
45
46 // Get an error for why this list is empty.
47 //
48 // If this list is empty, check for an underlying error in the debug
49 // information that prevented this list from being populated. This is not
50 // meant to return an error if there is no debug information as it is ok for a
51 // value list to be empty and no error should be returned in that case. If the
52 // debug info is for an assembly file or language that doesn't have any
53 // variables, no error should be returned.
54 //
55 // This is designed as a way to let users know when they enable certain
56 // compiler options that enable debug information but provide a degraded
57 // debug information content, like -gline-tables-only, which is a compiler
58 // option that allows users to set file and line breakpoints, but users get
59 // confused when no variables show up during debugging.
60 //
61 // It is also designed to inform a user that debug information might be
62 // available if an external file, like a .dwo file, but that file doesn't
63 // exist or wasn't able to be loaded due to a mismatched ID. When debugging
64 // with fission enabled, the line tables are linked into the main executable,
65 // but if the .dwo or .dwp files are not available or have been modified,
66 // users can get confused if they can stop at a file and line breakpoint but
67 // can't see variables in this case.
68 //
69 // This error can give vital clues to the user about the cause is and allow
70 // the user to fix the issue.
71 lldb::SBError GetError();
72
73protected:
74 // only useful for visualizing the pointer or comparing two SBValueLists to
75 // see if they are backed by the same underlying Impl.
76 void *opaque_ptr();
77
78private:
79 friend class SBFrame;
80
81 SBValueList(const ValueListImpl *lldb_object_ptr);
82
83 void Append(lldb::ValueObjectSP &val_obj_sp);
84
85 void CreateIfNeeded();
86
87 ValueListImpl *operator->();
88
89 ValueListImpl &operator*();
90
91 const ValueListImpl *operator->() const;
92
93 const ValueListImpl &operator*() const;
94
95 ValueListImpl &ref();
96
97 std::unique_ptr<ValueListImpl> m_opaque_up;
98
99 void SetError(const lldb_private::Status &status);
100};
101
102} // namespace lldb
103
104#endif // LLDB_API_SBVALUELIST_H
#define LLDB_API
Definition: SBDefines.h:28
std::unique_ptr< ValueListImpl > m_opaque_up
Definition: SBValueList.h:97
An error handling class.
Definition: Status.h:44
Definition: SBAddress.h:15
std::shared_ptr< lldb_private::ValueObject > ValueObjectSP
Definition: lldb-forward.h:479
uint64_t user_id_t
Definition: lldb-types.h:82