contrib/llvm/tools/lldb/source/Symbol/SymbolFile.cpp

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