contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFIndex.cpp

   1 //===-- DWARFIndex.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 "Plugins/SymbolFile/DWARF/DWARFIndex.h"
  11 #include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
  12 #include "Plugins/SymbolFile/DWARF/DWARFDebugInfo.h"
  13
  14 #include "Plugins/Language/ObjC/ObjCLanguage.h"
  15
  16 using namespace lldb_private;
  17 using namespace lldb;
  18
  19 DWARFIndex::~DWARFIndex() = default;
  20
  21 void DWARFIndex::ProcessFunctionDIE(llvm::StringRef name, DIERef ref,
  22                                     DWARFDebugInfo &info,
  23                                     const CompilerDeclContext &parent_decl_ctx,
  24                                     uint32_t name_type_mask,
  25                                     std::vector<DWARFDIE> &dies) {
  26   DWARFDIE die = info.GetDIE(ref);
  27   if (!die) {
  28     ReportInvalidDIEOffset(ref.die_offset, name);
  29     return;
  30   }
  31
  32   // Exit early if we're searching exclusively for methods or selectors and
  33   // we have a context specified (no methods in namespaces).
  34   uint32_t looking_for_nonmethods =
  35       name_type_mask & ~(eFunctionNameTypeMethod | eFunctionNameTypeSelector);
  36   if (!looking_for_nonmethods && parent_decl_ctx.IsValid())
  37     return;
  38
  39   // Otherwise, we need to also check that the context matches. If it does not
  40   // match, we do nothing.
  41   if (!SymbolFileDWARF::DIEInDeclContext(&parent_decl_ctx, die))
  42     return;
  43
  44   // In case of a full match, we just insert everything we find.
  45   if (name_type_mask & eFunctionNameTypeFull) {
  46     dies.push_back(die);
  47     return;
  48   }
  49
  50   // If looking for ObjC selectors, we need to also check if the name is a
  51   // possible selector.
  52   if (name_type_mask & eFunctionNameTypeSelector &&
  53       ObjCLanguage::IsPossibleObjCMethodName(die.GetName())) {
  54     dies.push_back(die);
  55     return;
  56   }
  57
  58   bool looking_for_methods = name_type_mask & lldb::eFunctionNameTypeMethod;
  59   bool looking_for_functions = name_type_mask & lldb::eFunctionNameTypeBase;
  60   if (looking_for_methods || looking_for_functions) {
  61     // If we're looking for either methods or functions, we definitely want this
  62     // die. Otherwise, only keep it if the die type matches what we are
  63     // searching for.
  64     if ((looking_for_methods && looking_for_functions) ||
  65         looking_for_methods == die.IsMethod())
  66       dies.push_back(die);
  67   }
  68 }