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DWARFDeclContext.cpp
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1 //===-- DWARFDeclContext.cpp ----------------------------------------------===//
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 #include "DWARFDeclContext.h"
10 
11 using namespace lldb_private::dwarf;
12 
14  if (m_qualified_name.empty()) {
15  // The declaration context array for a class named "foo" in namespace
16  // "a::b::c" will be something like:
17  // [0] DW_TAG_class_type "foo"
18  // [1] DW_TAG_namespace "c"
19  // [2] DW_TAG_namespace "b"
20  // [3] DW_TAG_namespace "a"
21  if (!m_entries.empty()) {
22  if (m_entries.size() == 1) {
23  if (m_entries[0].name) {
24  m_qualified_name.append("::");
25  m_qualified_name.append(m_entries[0].name);
26  }
27  } else {
28  collection::const_reverse_iterator pos;
29  collection::const_reverse_iterator begin = m_entries.rbegin();
30  collection::const_reverse_iterator end = m_entries.rend();
31  for (pos = begin; pos != end; ++pos) {
32  if (pos != begin)
33  m_qualified_name.append("::");
34  if (pos->name == nullptr) {
35  if (pos->tag == DW_TAG_namespace)
36  m_qualified_name.append("(anonymous namespace)");
37  else if (pos->tag == DW_TAG_class_type)
38  m_qualified_name.append("(anonymous class)");
39  else if (pos->tag == DW_TAG_structure_type)
40  m_qualified_name.append("(anonymous struct)");
41  else if (pos->tag == DW_TAG_union_type)
42  m_qualified_name.append("(anonymous union)");
43  else
44  m_qualified_name.append("(anonymous)");
45  } else
46  m_qualified_name.append(pos->name);
47  }
48  }
49  }
50  }
51  if (m_qualified_name.empty())
52  return nullptr;
53  return m_qualified_name.c_str();
54 }
55 
57  if (m_entries.size() != rhs.m_entries.size())
58  return false;
59 
60  collection::const_iterator pos;
61  collection::const_iterator begin = m_entries.begin();
62  collection::const_iterator end = m_entries.end();
63 
64  collection::const_iterator rhs_pos;
65  collection::const_iterator rhs_begin = rhs.m_entries.begin();
66  // The two entry arrays have the same size
67 
68  // First compare the tags before we do expensive name compares
69  for (pos = begin, rhs_pos = rhs_begin; pos != end; ++pos, ++rhs_pos) {
70  if (pos->tag != rhs_pos->tag) {
71  // Check for DW_TAG_structure_type and DW_TAG_class_type as they are
72  // often used interchangeably in GCC
73  if (pos->tag == DW_TAG_structure_type &&
74  rhs_pos->tag == DW_TAG_class_type)
75  continue;
76  if (pos->tag == DW_TAG_class_type &&
77  rhs_pos->tag == DW_TAG_structure_type)
78  continue;
79  return false;
80  }
81  }
82  // The tags all match, now compare the names
83  for (pos = begin, rhs_pos = rhs_begin; pos != end; ++pos, ++rhs_pos) {
84  if (!pos->NameMatches(*rhs_pos))
85  return false;
86  }
87  // All tags and names match
88  return true;
89 }
DWARFDeclContext::m_entries
collection m_entries
Definition: DWARFDeclContext.h:84
DWARFDeclContext::operator==
bool operator==(const DWARFDeclContext &rhs) const
Definition: DWARFDeclContext.cpp:56
DWARFDeclContext.h
DWARFDeclContext::GetQualifiedName
const char * GetQualifiedName() const
Definition: DWARFDeclContext.cpp:13
DWARFDeclContext
Definition: DWARFDeclContext.h:23
lldb_private::dwarf
Definition: dwarf.h:19