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TypeList.cpp
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1 //===-- TypeList.cpp --------------------------------------------*- 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 #include <vector>
10 
11 #include "llvm/Support/FormattedStream.h"
12 #include "llvm/Support/raw_ostream.h"
13 
14 #include "lldb/Symbol/SymbolFile.h"
16 #include "lldb/Symbol/Type.h"
17 #include "lldb/Symbol/TypeList.h"
18 
19 using namespace lldb;
20 using namespace lldb_private;
21 
22 TypeList::TypeList() : m_types() {}
23 
24 // Destructor
26 
27 void TypeList::Insert(const TypeSP &type_sp) {
28  // Just push each type on the back for now. We will worry about uniquing
29  // later
30  if (type_sp)
31  m_types.push_back(type_sp);
32 }
33 
34 // Find a base type by its unique ID.
35 // TypeSP
36 // TypeList::FindType(lldb::user_id_t uid)
37 //{
38 // iterator pos = m_types.find(uid);
39 // if (pos != m_types.end())
40 // return pos->second;
41 // return TypeSP();
42 //}
43 
44 // Find a type by name.
45 // TypeList
46 // TypeList::FindTypes (ConstString name)
47 //{
48 // // Do we ever need to make a lookup by name map? Here we are doing
49 // // a linear search which isn't going to be fast.
50 // TypeList types(m_ast.getTargetInfo()->getTriple().getTriple().c_str());
51 // iterator pos, end;
52 // for (pos = m_types.begin(), end = m_types.end(); pos != end; ++pos)
53 // if (pos->second->GetName() == name)
54 // types.Insert (pos->second);
55 // return types;
56 //}
57 
58 void TypeList::Clear() { m_types.clear(); }
59 
60 uint32_t TypeList::GetSize() const { return m_types.size(); }
61 
62 // GetTypeAtIndex isn't used a lot for large type lists, currently only for
63 // type lists that are returned for "image dump -t TYPENAME" commands and other
64 // simple symbol queries that grab the first result...
65 
67  iterator pos, end;
68  uint32_t i = idx;
69  assert(i < GetSize() && "Accessing past the end of a TypeList");
70  for (pos = m_types.begin(), end = m_types.end(); pos != end; ++pos) {
71  if (i == 0)
72  return *pos;
73  --i;
74  }
75  return TypeSP();
76 }
77 
79  std::function<bool(const lldb::TypeSP &type_sp)> const &callback) const {
80  for (auto pos = m_types.begin(), end = m_types.end(); pos != end; ++pos) {
81  if (!callback(*pos))
82  break;
83  }
84 }
85 
87  std::function<bool(lldb::TypeSP &type_sp)> const &callback) {
88  for (auto pos = m_types.begin(), end = m_types.end(); pos != end; ++pos) {
89  if (!callback(*pos))
90  break;
91  }
92 }
93 
94 void TypeList::Dump(Stream *s, bool show_context) {
95  for (iterator pos = m_types.begin(), end = m_types.end(); pos != end; ++pos) {
96  pos->get()->Dump(s, show_context);
97  }
98 }
99 
100 void TypeList::RemoveMismatchedTypes(const char *qualified_typename,
101  bool exact_match) {
102  llvm::StringRef type_scope;
103  llvm::StringRef type_basename;
104  TypeClass type_class = eTypeClassAny;
105  if (!Type::GetTypeScopeAndBasename(qualified_typename, type_scope,
106  type_basename, type_class)) {
107  type_basename = qualified_typename;
108  type_scope = "";
109  }
110  return RemoveMismatchedTypes(type_scope, type_basename, type_class,
111  exact_match);
112 }
113 
114 void TypeList::RemoveMismatchedTypes(const std::string &type_scope,
115  const std::string &type_basename,
116  TypeClass type_class, bool exact_match) {
117  // Our "collection" type currently is a std::map which doesn't have any good
118  // way to iterate and remove items from the map so we currently just make a
119  // new list and add all of the matching types to it, and then swap it into
120  // m_types at the end
121  collection matching_types;
122 
123  iterator pos, end = m_types.end();
124 
125  for (pos = m_types.begin(); pos != end; ++pos) {
126  Type *the_type = pos->get();
127  bool keep_match = false;
128  TypeClass match_type_class = eTypeClassAny;
129 
130  if (type_class != eTypeClassAny) {
131  match_type_class = the_type->GetForwardCompilerType().GetTypeClass();
132  if ((match_type_class & type_class) == 0)
133  continue;
134  }
135 
136  ConstString match_type_name_const_str(the_type->GetQualifiedName());
137  if (match_type_name_const_str) {
138  const char *match_type_name = match_type_name_const_str.GetCString();
139  llvm::StringRef match_type_scope;
140  llvm::StringRef match_type_basename;
141  if (Type::GetTypeScopeAndBasename(match_type_name, match_type_scope,
142  match_type_basename,
143  match_type_class)) {
144  if (match_type_basename == type_basename) {
145  const size_t type_scope_size = type_scope.size();
146  const size_t match_type_scope_size = match_type_scope.size();
147  if (exact_match || (type_scope_size == match_type_scope_size)) {
148  keep_match = match_type_scope == type_scope;
149  } else {
150  if (match_type_scope_size > type_scope_size) {
151  const size_t type_scope_pos = match_type_scope.rfind(type_scope);
152  if (type_scope_pos == match_type_scope_size - type_scope_size) {
153  if (type_scope_pos >= 2) {
154  // Our match scope ends with the type scope we were looking
155  // for, but we need to make sure what comes before the
156  // matching type scope is a namespace boundary in case we are
157  // trying to match: type_basename = "d" type_scope = "b::c::"
158  // We want to match:
159  // match_type_scope "a::b::c::"
160  // But not:
161  // match_type_scope "a::bb::c::"
162  // So below we make sure what comes before "b::c::" in
163  // match_type_scope is "::", or the namespace boundary
164  if (match_type_scope[type_scope_pos - 1] == ':' &&
165  match_type_scope[type_scope_pos - 2] == ':') {
166  keep_match = true;
167  }
168  }
169  }
170  }
171  }
172  }
173  } else {
174  // The type we are currently looking at doesn't exists in a namespace
175  // or class, so it only matches if there is no type scope...
176  keep_match = type_scope.empty() && type_basename == match_type_name;
177  }
178  }
179 
180  if (keep_match) {
181  matching_types.push_back(*pos);
182  }
183  }
184  m_types.swap(matching_types);
185 }
186 
187 void TypeList::RemoveMismatchedTypes(TypeClass type_class) {
188  if (type_class == eTypeClassAny)
189  return;
190 
191  // Our "collection" type currently is a std::map which doesn't have any good
192  // way to iterate and remove items from the map so we currently just make a
193  // new list and add all of the matching types to it, and then swap it into
194  // m_types at the end
195  collection matching_types;
196 
197  iterator pos, end = m_types.end();
198 
199  for (pos = m_types.begin(); pos != end; ++pos) {
200  Type *the_type = pos->get();
201  TypeClass match_type_class =
202  the_type->GetForwardCompilerType().GetTypeClass();
203  if (match_type_class & type_class)
204  matching_types.push_back(*pos);
205  }
206  m_types.swap(matching_types);
207 }
lldb::TypeSP GetTypeAtIndex(uint32_t idx)
Definition: TypeList.cpp:66
Enumerations for broadcasting.
Definition: SBLaunchInfo.h:14
A stream class that can stream formatted output to a file.
Definition: Stream.h:28
static bool GetTypeScopeAndBasename(const llvm::StringRef &name, llvm::StringRef &scope, llvm::StringRef &basename, lldb::TypeClass &type_class)
Definition: Type.cpp:630
std::vector< lldb::TypeSP > collection
Definition: TypeList.h:42
uint32_t GetSize() const
Definition: TypeList.cpp:60
lldb::TypeClass GetTypeClass() const
void Insert(const lldb::TypeSP &type)
Definition: TypeList.cpp:27
void RemoveMismatchedTypes(const char *qualified_typename, bool exact_match)
Definition: TypeList.cpp:100
void Dump(Stream *s, bool show_context)
Definition: TypeList.cpp:94
ConstString GetQualifiedName()
Definition: Type.cpp:626
CompilerType GetForwardCompilerType()
Definition: Type.cpp:610
void ForEach(std::function< bool(const lldb::TypeSP &type_sp)> const &callback) const
Definition: TypeList.cpp:78
A uniqued constant string class.
Definition: ConstString.h:38
const char * GetCString() const
Get the string value as a C string.
Definition: ConstString.h:247
Definition: SBAddress.h:15