SymbolFile.cpp revision 321369 
1//===-- SymbolFile.cpp ------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Symbol/SymbolFile.h"
11
12#include "lldb/Core/Module.h"
13#include "lldb/Core/PluginManager.h"
14#include "lldb/Symbol/ObjectFile.h"
15#include "lldb/Symbol/TypeMap.h"
16#include "lldb/Symbol/TypeSystem.h"
17#include "lldb/Symbol/VariableList.h"
18#include "lldb/Utility/Log.h"
19#include "lldb/Utility/StreamString.h"
20#include "lldb/lldb-private.h"
21
22using namespace lldb_private;
23
24void SymbolFile::PreloadSymbols() {
25  // No-op for most implementations.
26}
27
28SymbolFile *SymbolFile::FindPlugin(ObjectFile *obj_file) {
29  std::unique_ptr<SymbolFile> best_symfile_ap;
30  if (obj_file != nullptr) {
31
32    // We need to test the abilities of this section list. So create what it
33    // would
34    // be with this new obj_file.
35    lldb::ModuleSP module_sp(obj_file->GetModule());
36    if (module_sp) {
37      // Default to the main module section list.
38      ObjectFile *module_obj_file = module_sp->GetObjectFile();
39      if (module_obj_file != obj_file) {
40        // Make sure the main object file's sections are created
41        module_obj_file->GetSectionList();
42        obj_file->CreateSections(*module_sp->GetUnifiedSectionList());
43      }
44    }
45
46    // TODO: Load any plug-ins in the appropriate plug-in search paths and
47    // iterate over all of them to find the best one for the job.
48
49    uint32_t best_symfile_abilities = 0;
50
51    SymbolFileCreateInstance create_callback;
52    for (uint32_t idx = 0;
53         (create_callback = PluginManager::GetSymbolFileCreateCallbackAtIndex(
54              idx)) != nullptr;
55         ++idx) {
56      std::unique_ptr<SymbolFile> curr_symfile_ap(create_callback(obj_file));
57
58      if (curr_symfile_ap.get()) {
59        const uint32_t sym_file_abilities = curr_symfile_ap->GetAbilities();
60        if (sym_file_abilities > best_symfile_abilities) {
61          best_symfile_abilities = sym_file_abilities;
62          best_symfile_ap.reset(curr_symfile_ap.release());
63          // If any symbol file parser has all of the abilities, then
64          // we should just stop looking.
65          if ((kAllAbilities & sym_file_abilities) == kAllAbilities)
66            break;
67        }
68      }
69    }
70    if (best_symfile_ap.get()) {
71      // Let the winning symbol file parser initialize itself more
72      // completely now that it has been chosen
73      best_symfile_ap->InitializeObject();
74    }
75  }
76  return best_symfile_ap.release();
77}
78
79TypeList *SymbolFile::GetTypeList() {
80  if (m_obj_file)
81    return m_obj_file->GetModule()->GetTypeList();
82  return nullptr;
83}
84
85TypeSystem *SymbolFile::GetTypeSystemForLanguage(lldb::LanguageType language) {
86  TypeSystem *type_system =
87      m_obj_file->GetModule()->GetTypeSystemForLanguage(language);
88  if (type_system)
89    type_system->SetSymbolFile(this);
90  return type_system;
91}
92
93uint32_t SymbolFile::ResolveSymbolContext(const FileSpec &file_spec,
94                                          uint32_t line, bool check_inlines,
95                                          uint32_t resolve_scope,
96                                          SymbolContextList &sc_list) {
97  return 0;
98}
99
100uint32_t SymbolFile::FindGlobalVariables(
101    const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
102    bool append, uint32_t max_matches, VariableList &variables) {
103  if (!append)
104    variables.Clear();
105  return 0;
106}
107
108uint32_t SymbolFile::FindGlobalVariables(const RegularExpression &regex,
109                                         bool append, uint32_t max_matches,
110                                         VariableList &variables) {
111  if (!append)
112    variables.Clear();
113  return 0;
114}
115
116uint32_t SymbolFile::FindFunctions(const ConstString &name,
117                                   const CompilerDeclContext *parent_decl_ctx,
118                                   uint32_t name_type_mask,
119                                   bool include_inlines, bool append,
120                                   SymbolContextList &sc_list) {
121  if (!append)
122    sc_list.Clear();
123  return 0;
124}
125
126uint32_t SymbolFile::FindFunctions(const RegularExpression &regex,
127                                   bool include_inlines, bool append,
128                                   SymbolContextList &sc_list) {
129  if (!append)
130    sc_list.Clear();
131  return 0;
132}
133
134void SymbolFile::GetMangledNamesForFunction(
135    const std::string &scope_qualified_name,
136    std::vector<ConstString> &mangled_names) {
137  return;
138}
139
140uint32_t SymbolFile::FindTypes(
141    const SymbolContext &sc, const ConstString &name,
142    const CompilerDeclContext *parent_decl_ctx, bool append,
143    uint32_t max_matches,
144    llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
145    TypeMap &types) {
146  if (!append)
147    types.Clear();
148  return 0;
149}
150
151size_t SymbolFile::FindTypes(const std::vector<CompilerContext> &context,
152                             bool append, TypeMap &types) {
153  if (!append)
154    types.Clear();
155  return 0;
156}
157