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llvm-project/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp

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//===-- SymbolFileDWARF.cpp ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SymbolFileDWARF.h"
// Other libraries and framework includes
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclGroup.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Specifiers.h"
#include "clang/Sema/DeclSpec.h"
#include "llvm/Support/Casting.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/RegularExpression.h"
#include "lldb/Core/Scalar.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/Timer.h"
#include "lldb/Core/Value.h"
#include "lldb/Expression/ClangModulesDeclVendor.h"
#include "lldb/Host/Host.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/ClangExternalASTSourceCallbacks.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/CPPLanguageRuntime.h"
#include "DWARFCompileUnit.h"
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugInfo.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFDebugLine.h"
#include "DWARFDebugPubnames.h"
#include "DWARFDebugRanges.h"
#include "DWARFDeclContext.h"
#include "DWARFDIECollection.h"
#include "DWARFFormValue.h"
#include "DWARFLocationList.h"
#include "LogChannelDWARF.h"
#include "SymbolFileDWARFDebugMap.h"
#include <map>
#include <ctype.h>
#include <string.h>
//#define ENABLE_DEBUG_PRINTF // COMMENT OUT THIS LINE PRIOR TO CHECKIN
#ifdef ENABLE_DEBUG_PRINTF
#include <stdio.h>
#define DEBUG_PRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
#else
#define DEBUG_PRINTF(fmt, ...)
#endif
#define DIE_IS_BEING_PARSED ((lldb_private::Type*)1)
using namespace lldb;
using namespace lldb_private;
//static inline bool
//child_requires_parent_class_union_or_struct_to_be_completed (dw_tag_t tag)
//{
// switch (tag)
// {
// default:
// break;
// case DW_TAG_subprogram:
// case DW_TAG_inlined_subroutine:
// case DW_TAG_class_type:
// case DW_TAG_structure_type:
// case DW_TAG_union_type:
// return true;
// }
// return false;
//}
//
static AccessType
DW_ACCESS_to_AccessType (uint32_t dwarf_accessibility)
{
switch (dwarf_accessibility)
{
case DW_ACCESS_public: return eAccessPublic;
case DW_ACCESS_private: return eAccessPrivate;
case DW_ACCESS_protected: return eAccessProtected;
default: break;
}
return eAccessNone;
}
static const char*
removeHostnameFromPathname(const char* path_from_dwarf)
{
if (!path_from_dwarf || !path_from_dwarf[0])
{
return path_from_dwarf;
}
const char *colon_pos = strchr(path_from_dwarf, ':');
if (!colon_pos)
{
return path_from_dwarf;
}
// check whether we have a windows path, and so the first character
// is a drive-letter not a hostname.
if (
colon_pos == path_from_dwarf + 1 &&
isalpha(*path_from_dwarf) &&
strlen(path_from_dwarf) > 2 &&
'\\' == path_from_dwarf[2])
{
return path_from_dwarf;
}
return colon_pos + 1;
}
#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
class DIEStack
{
public:
void Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
{
m_dies.push_back (DIEInfo(cu, die));
}
void LogDIEs (Log *log, SymbolFileDWARF *dwarf)
{
StreamString log_strm;
const size_t n = m_dies.size();
log_strm.Printf("DIEStack[%" PRIu64 "]:\n", (uint64_t)n);
for (size_t i=0; i<n; i++)
{
DWARFCompileUnit *cu = m_dies[i].cu;
const DWARFDebugInfoEntry *die = m_dies[i].die;
std::string qualified_name;
die->GetQualifiedName(dwarf, cu, qualified_name);
log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
(uint64_t)i,
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
qualified_name.c_str());
}
log->PutCString(log_strm.GetData());
}
void Pop ()
{
m_dies.pop_back();
}
class ScopedPopper
{
public:
ScopedPopper (DIEStack &die_stack) :
m_die_stack (die_stack),
m_valid (false)
{
}
void
Push (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
{
m_valid = true;
m_die_stack.Push (cu, die);
}
~ScopedPopper ()
{
if (m_valid)
m_die_stack.Pop();
}
protected:
DIEStack &m_die_stack;
bool m_valid;
};
protected:
struct DIEInfo {
DIEInfo (DWARFCompileUnit *c, const DWARFDebugInfoEntry *d) :
cu(c),
die(d)
{
}
DWARFCompileUnit *cu;
const DWARFDebugInfoEntry *die;
};
typedef std::vector<DIEInfo> Stack;
Stack m_dies;
};
#endif
void
SymbolFileDWARF::Initialize()
{
LogChannelDWARF::Initialize();
PluginManager::RegisterPlugin (GetPluginNameStatic(),
GetPluginDescriptionStatic(),
CreateInstance);
}
void
SymbolFileDWARF::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
LogChannelDWARF::Initialize();
}
lldb_private::ConstString
SymbolFileDWARF::GetPluginNameStatic()
{
static ConstString g_name("dwarf");
return g_name;
}
const char *
SymbolFileDWARF::GetPluginDescriptionStatic()
{
return "DWARF and DWARF3 debug symbol file reader.";
}
SymbolFile*
SymbolFileDWARF::CreateInstance (ObjectFile* obj_file)
{
return new SymbolFileDWARF(obj_file);
}
TypeList *
SymbolFileDWARF::GetTypeList ()
{
if (GetDebugMapSymfile ())
return m_debug_map_symfile->GetTypeList();
return m_obj_file->GetModule()->GetTypeList();
}
void
SymbolFileDWARF::GetTypes (DWARFCompileUnit* cu,
const DWARFDebugInfoEntry *die,
dw_offset_t min_die_offset,
dw_offset_t max_die_offset,
uint32_t type_mask,
TypeSet &type_set)
{
if (cu)
{
if (die)
{
const dw_offset_t die_offset = die->GetOffset();
if (die_offset >= max_die_offset)
return;
if (die_offset >= min_die_offset)
{
const dw_tag_t tag = die->Tag();
bool add_type = false;
switch (tag)
{
case DW_TAG_array_type: add_type = (type_mask & eTypeClassArray ) != 0; break;
case DW_TAG_unspecified_type:
case DW_TAG_base_type: add_type = (type_mask & eTypeClassBuiltin ) != 0; break;
case DW_TAG_class_type: add_type = (type_mask & eTypeClassClass ) != 0; break;
case DW_TAG_structure_type: add_type = (type_mask & eTypeClassStruct ) != 0; break;
case DW_TAG_union_type: add_type = (type_mask & eTypeClassUnion ) != 0; break;
case DW_TAG_enumeration_type: add_type = (type_mask & eTypeClassEnumeration ) != 0; break;
case DW_TAG_subroutine_type:
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine: add_type = (type_mask & eTypeClassFunction ) != 0; break;
case DW_TAG_pointer_type: add_type = (type_mask & eTypeClassPointer ) != 0; break;
case DW_TAG_rvalue_reference_type:
case DW_TAG_reference_type: add_type = (type_mask & eTypeClassReference ) != 0; break;
case DW_TAG_typedef: add_type = (type_mask & eTypeClassTypedef ) != 0; break;
case DW_TAG_ptr_to_member_type: add_type = (type_mask & eTypeClassMemberPointer ) != 0; break;
}
if (add_type)
{
const bool assert_not_being_parsed = true;
Type *type = ResolveTypeUID (cu, die, assert_not_being_parsed);
if (type)
{
if (type_set.find(type) == type_set.end())
type_set.insert(type);
}
}
}
for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
child_die != NULL;
child_die = child_die->GetSibling())
{
GetTypes (cu, child_die, min_die_offset, max_die_offset, type_mask, type_set);
}
}
}
}
size_t
SymbolFileDWARF::GetTypes (SymbolContextScope *sc_scope,
uint32_t type_mask,
TypeList &type_list)
{
TypeSet type_set;
CompileUnit *comp_unit = NULL;
DWARFCompileUnit* dwarf_cu = NULL;
if (sc_scope)
comp_unit = sc_scope->CalculateSymbolContextCompileUnit();
if (comp_unit)
{
dwarf_cu = GetDWARFCompileUnit(comp_unit);
if (dwarf_cu == 0)
return 0;
GetTypes (dwarf_cu,
dwarf_cu->DIE(),
dwarf_cu->GetOffset(),
dwarf_cu->GetNextCompileUnitOffset(),
type_mask,
type_set);
}
else
{
DWARFDebugInfo* info = DebugInfo();
if (info)
{
const size_t num_cus = info->GetNumCompileUnits();
for (size_t cu_idx=0; cu_idx<num_cus; ++cu_idx)
{
dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
if (dwarf_cu)
{
GetTypes (dwarf_cu,
dwarf_cu->DIE(),
0,
UINT32_MAX,
type_mask,
type_set);
}
}
}
}
// if (m_using_apple_tables)
// {
// DWARFMappedHash::MemoryTable *apple_types = m_apple_types_ap.get();
// if (apple_types)
// {
// apple_types->ForEach([this, &type_set, apple_types, type_mask](const DWARFMappedHash::DIEInfoArray &die_info_array) -> bool {
//
// for (auto die_info: die_info_array)
// {
// bool add_type = TagMatchesTypeMask (type_mask, 0);
// if (!add_type)
// {
// dw_tag_t tag = die_info.tag;
// if (tag == 0)
// {
// const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_info.offset, NULL);
// tag = die->Tag();
// }
// add_type = TagMatchesTypeMask (type_mask, tag);
// }
// if (add_type)
// {
// Type *type = ResolveTypeUID(die_info.offset);
//
// if (type_set.find(type) == type_set.end())
// type_set.insert(type);
// }
// }
// return true; // Keep iterating
// });
// }
// }
// else
// {
// if (!m_indexed)
// Index ();
//
// m_type_index.ForEach([this, &type_set, type_mask](const char *name, uint32_t die_offset) -> bool {
//
// bool add_type = TagMatchesTypeMask (type_mask, 0);
//
// if (!add_type)
// {
// const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtr(die_offset, NULL);
// if (die)
// {
// const dw_tag_t tag = die->Tag();
// add_type = TagMatchesTypeMask (type_mask, tag);
// }
// }
//
// if (add_type)
// {
// Type *type = ResolveTypeUID(die_offset);
//
// if (type_set.find(type) == type_set.end())
// type_set.insert(type);
// }
// return true; // Keep iterating
// });
// }
std::set<ClangASTType> clang_type_set;
size_t num_types_added = 0;
for (Type *type : type_set)
{
ClangASTType clang_type = type->GetClangForwardType();
if (clang_type_set.find(clang_type) == clang_type_set.end())
{
clang_type_set.insert(clang_type);
type_list.Insert (type->shared_from_this());
++num_types_added;
}
}
return num_types_added;
}
//----------------------------------------------------------------------
// Gets the first parent that is a lexical block, function or inlined
// subroutine, or compile unit.
//----------------------------------------------------------------------
static const DWARFDebugInfoEntry *
GetParentSymbolContextDIE(const DWARFDebugInfoEntry *child_die)
{
const DWARFDebugInfoEntry *die;
for (die = child_die->GetParent(); die != NULL; die = die->GetParent())
{
dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_compile_unit:
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_lexical_block:
return die;
}
}
return NULL;
}
SymbolFileDWARF::SymbolFileDWARF(ObjectFile* objfile) :
SymbolFile (objfile),
UserID (0), // Used by SymbolFileDWARFDebugMap to when this class parses .o files to contain the .o file index/ID
m_debug_map_module_wp (),
m_debug_map_symfile (NULL),
m_clang_tu_decl (NULL),
m_flags(),
m_data_debug_abbrev (),
m_data_debug_aranges (),
m_data_debug_frame (),
m_data_debug_info (),
m_data_debug_line (),
m_data_debug_loc (),
m_data_debug_ranges (),
m_data_debug_str (),
m_data_apple_names (),
m_data_apple_types (),
m_data_apple_namespaces (),
m_abbr(),
m_info(),
m_line(),
m_apple_names_ap (),
m_apple_types_ap (),
m_apple_namespaces_ap (),
m_apple_objc_ap (),
m_function_basename_index(),
m_function_fullname_index(),
m_function_method_index(),
m_function_selector_index(),
m_objc_class_selectors_index(),
m_global_index(),
m_type_index(),
m_namespace_index(),
m_indexed (false),
m_is_external_ast_source (false),
m_using_apple_tables (false),
m_fetched_external_modules (false),
m_supports_DW_AT_APPLE_objc_complete_type (eLazyBoolCalculate),
m_ranges(),
m_unique_ast_type_map ()
{
}
SymbolFileDWARF::~SymbolFileDWARF()
{
if (m_is_external_ast_source)
{
ModuleSP module_sp (m_obj_file->GetModule());
if (module_sp)
module_sp->GetClangASTContext().RemoveExternalSource ();
}
}
static const ConstString &
GetDWARFMachOSegmentName ()
{
static ConstString g_dwarf_section_name ("__DWARF");
return g_dwarf_section_name;
}
UniqueDWARFASTTypeMap &
SymbolFileDWARF::GetUniqueDWARFASTTypeMap ()
{
if (GetDebugMapSymfile ())
return m_debug_map_symfile->GetUniqueDWARFASTTypeMap ();
return m_unique_ast_type_map;
}
ClangASTContext &
SymbolFileDWARF::GetClangASTContext ()
{
if (GetDebugMapSymfile ())
return m_debug_map_symfile->GetClangASTContext ();
ClangASTContext &ast = m_obj_file->GetModule()->GetClangASTContext();
if (!m_is_external_ast_source)
{
m_is_external_ast_source = true;
llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source_ap (
new ClangExternalASTSourceCallbacks (SymbolFileDWARF::CompleteTagDecl,
SymbolFileDWARF::CompleteObjCInterfaceDecl,
SymbolFileDWARF::FindExternalVisibleDeclsByName,
SymbolFileDWARF::LayoutRecordType,
this));
ast.SetExternalSource (ast_source_ap);
}
return ast;
}
void
SymbolFileDWARF::InitializeObject()
{
// Install our external AST source callbacks so we can complete Clang types.
ModuleSP module_sp (m_obj_file->GetModule());
if (module_sp)
{
const SectionList *section_list = module_sp->GetSectionList();
const Section* section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
// Memory map the DWARF mach-o segment so we have everything mmap'ed
// to keep our heap memory usage down.
if (section)
m_obj_file->MemoryMapSectionData(section, m_dwarf_data);
}
get_apple_names_data();
if (m_data_apple_names.GetByteSize() > 0)
{
m_apple_names_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_names, get_debug_str_data(), ".apple_names"));
if (m_apple_names_ap->IsValid())
m_using_apple_tables = true;
else
m_apple_names_ap.reset();
}
get_apple_types_data();
if (m_data_apple_types.GetByteSize() > 0)
{
m_apple_types_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_types, get_debug_str_data(), ".apple_types"));
if (m_apple_types_ap->IsValid())
m_using_apple_tables = true;
else
m_apple_types_ap.reset();
}
get_apple_namespaces_data();
if (m_data_apple_namespaces.GetByteSize() > 0)
{
m_apple_namespaces_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_namespaces, get_debug_str_data(), ".apple_namespaces"));
if (m_apple_namespaces_ap->IsValid())
m_using_apple_tables = true;
else
m_apple_namespaces_ap.reset();
}
get_apple_objc_data();
if (m_data_apple_objc.GetByteSize() > 0)
{
m_apple_objc_ap.reset (new DWARFMappedHash::MemoryTable (m_data_apple_objc, get_debug_str_data(), ".apple_objc"));
if (m_apple_objc_ap->IsValid())
m_using_apple_tables = true;
else
m_apple_objc_ap.reset();
}
}
bool
SymbolFileDWARF::SupportedVersion(uint16_t version)
{
return version == 2 || version == 3 || version == 4;
}
uint32_t
SymbolFileDWARF::CalculateAbilities ()
{
uint32_t abilities = 0;
if (m_obj_file != NULL)
{
const Section* section = NULL;
const SectionList *section_list = m_obj_file->GetSectionList();
if (section_list == NULL)
return 0;
uint64_t debug_abbrev_file_size = 0;
uint64_t debug_info_file_size = 0;
uint64_t debug_line_file_size = 0;
section = section_list->FindSectionByName(GetDWARFMachOSegmentName ()).get();
if (section)
section_list = &section->GetChildren ();
section = section_list->FindSectionByType (eSectionTypeDWARFDebugInfo, true).get();
if (section != NULL)
{
debug_info_file_size = section->GetFileSize();
section = section_list->FindSectionByType (eSectionTypeDWARFDebugAbbrev, true).get();
if (section)
debug_abbrev_file_size = section->GetFileSize();
else
m_flags.Set (flagsGotDebugAbbrevData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugAranges, true).get();
if (!section)
m_flags.Set (flagsGotDebugArangesData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugFrame, true).get();
if (!section)
m_flags.Set (flagsGotDebugFrameData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugLine, true).get();
if (section)
debug_line_file_size = section->GetFileSize();
else
m_flags.Set (flagsGotDebugLineData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugLoc, true).get();
if (!section)
m_flags.Set (flagsGotDebugLocData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugMacInfo, true).get();
if (!section)
m_flags.Set (flagsGotDebugMacInfoData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubNames, true).get();
if (!section)
m_flags.Set (flagsGotDebugPubNamesData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugPubTypes, true).get();
if (!section)
m_flags.Set (flagsGotDebugPubTypesData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugRanges, true).get();
if (!section)
m_flags.Set (flagsGotDebugRangesData);
section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
if (!section)
m_flags.Set (flagsGotDebugStrData);
}
else
{
const char *symfile_dir_cstr = m_obj_file->GetFileSpec().GetDirectory().GetCString();
if (symfile_dir_cstr)
{
if (strcasestr(symfile_dir_cstr, ".dsym"))
{
if (m_obj_file->GetType() == ObjectFile::eTypeDebugInfo)
{
// We have a dSYM file that didn't have a any debug info.
// If the string table has a size of 1, then it was made from
// an executable with no debug info, or from an executable that
// was stripped.
section = section_list->FindSectionByType (eSectionTypeDWARFDebugStr, true).get();
if (section && section->GetFileSize() == 1)
{
m_obj_file->GetModule()->ReportWarning ("empty dSYM file detected, dSYM was created with an executable with no debug info.");
}
}
}
}
}
if (debug_abbrev_file_size > 0 && debug_info_file_size > 0)
abilities |= CompileUnits | Functions | Blocks | GlobalVariables | LocalVariables | VariableTypes;
if (debug_line_file_size > 0)
abilities |= LineTables;
}
return abilities;
}
const DWARFDataExtractor&
SymbolFileDWARF::GetCachedSectionData (uint32_t got_flag, SectionType sect_type, DWARFDataExtractor &data)
{
if (m_flags.IsClear (got_flag))
{
ModuleSP module_sp (m_obj_file->GetModule());
m_flags.Set (got_flag);
const SectionList *section_list = module_sp->GetSectionList();
if (section_list)
{
SectionSP section_sp (section_list->FindSectionByType(sect_type, true));
if (section_sp)
{
// See if we memory mapped the DWARF segment?
if (m_dwarf_data.GetByteSize())
{
data.SetData(m_dwarf_data, section_sp->GetOffset (), section_sp->GetFileSize());
}
else
{
if (m_obj_file->ReadSectionData (section_sp.get(), data) == 0)
data.Clear();
}
}
}
}
return data;
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_abbrev_data()
{
return GetCachedSectionData (flagsGotDebugAbbrevData, eSectionTypeDWARFDebugAbbrev, m_data_debug_abbrev);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_aranges_data()
{
return GetCachedSectionData (flagsGotDebugArangesData, eSectionTypeDWARFDebugAranges, m_data_debug_aranges);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_frame_data()
{
return GetCachedSectionData (flagsGotDebugFrameData, eSectionTypeDWARFDebugFrame, m_data_debug_frame);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_info_data()
{
return GetCachedSectionData (flagsGotDebugInfoData, eSectionTypeDWARFDebugInfo, m_data_debug_info);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_line_data()
{
return GetCachedSectionData (flagsGotDebugLineData, eSectionTypeDWARFDebugLine, m_data_debug_line);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_loc_data()
{
return GetCachedSectionData (flagsGotDebugLocData, eSectionTypeDWARFDebugLoc, m_data_debug_loc);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_ranges_data()
{
return GetCachedSectionData (flagsGotDebugRangesData, eSectionTypeDWARFDebugRanges, m_data_debug_ranges);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_debug_str_data()
{
return GetCachedSectionData (flagsGotDebugStrData, eSectionTypeDWARFDebugStr, m_data_debug_str);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_apple_names_data()
{
return GetCachedSectionData (flagsGotAppleNamesData, eSectionTypeDWARFAppleNames, m_data_apple_names);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_apple_types_data()
{
return GetCachedSectionData (flagsGotAppleTypesData, eSectionTypeDWARFAppleTypes, m_data_apple_types);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_apple_namespaces_data()
{
return GetCachedSectionData (flagsGotAppleNamespacesData, eSectionTypeDWARFAppleNamespaces, m_data_apple_namespaces);
}
const DWARFDataExtractor&
SymbolFileDWARF::get_apple_objc_data()
{
return GetCachedSectionData (flagsGotAppleObjCData, eSectionTypeDWARFAppleObjC, m_data_apple_objc);
}
DWARFDebugAbbrev*
SymbolFileDWARF::DebugAbbrev()
{
if (m_abbr.get() == NULL)
{
const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();
if (debug_abbrev_data.GetByteSize() > 0)
{
m_abbr.reset(new DWARFDebugAbbrev());
if (m_abbr.get())
m_abbr->Parse(debug_abbrev_data);
}
}
return m_abbr.get();
}
const DWARFDebugAbbrev*
SymbolFileDWARF::DebugAbbrev() const
{
return m_abbr.get();
}
DWARFDebugInfo*
SymbolFileDWARF::DebugInfo()
{
if (m_info.get() == NULL)
{
Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
__PRETTY_FUNCTION__, static_cast<void*>(this));
if (get_debug_info_data().GetByteSize() > 0)
{
m_info.reset(new DWARFDebugInfo());
if (m_info.get())
{
m_info->SetDwarfData(this);
}
}
}
return m_info.get();
}
const DWARFDebugInfo*
SymbolFileDWARF::DebugInfo() const
{
return m_info.get();
}
DWARFCompileUnit*
SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
{
DWARFDebugInfo* info = DebugInfo();
if (info)
{
if (GetDebugMapSymfile ())
{
// The debug map symbol file made the compile units for this DWARF
// file which is .o file with DWARF in it, and we should have
// only 1 compile unit which is at offset zero in the DWARF.
// TODO: modify to support LTO .o files where each .o file might
// have multiple DW_TAG_compile_unit tags.
DWARFCompileUnit *dwarf_cu = info->GetCompileUnit(0).get();
if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
dwarf_cu->SetUserData(comp_unit);
return dwarf_cu;
}
else
{
// Just a normal DWARF file whose user ID for the compile unit is
// the DWARF offset itself
DWARFCompileUnit *dwarf_cu = info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
dwarf_cu->SetUserData(comp_unit);
return dwarf_cu;
}
}
return NULL;
}
DWARFDebugRanges*
SymbolFileDWARF::DebugRanges()
{
if (m_ranges.get() == NULL)
{
Timer scoped_timer(__PRETTY_FUNCTION__, "%s this = %p",
__PRETTY_FUNCTION__, static_cast<void*>(this));
if (get_debug_ranges_data().GetByteSize() > 0)
{
m_ranges.reset(new DWARFDebugRanges());
if (m_ranges.get())
m_ranges->Extract(this);
}
}
return m_ranges.get();
}
const DWARFDebugRanges*
SymbolFileDWARF::DebugRanges() const
{
return m_ranges.get();
}
lldb::CompUnitSP
SymbolFileDWARF::ParseCompileUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
{
CompUnitSP cu_sp;
if (dwarf_cu)
{
CompileUnit *comp_unit = (CompileUnit*)dwarf_cu->GetUserData();
if (comp_unit)
{
// We already parsed this compile unit, had out a shared pointer to it
cu_sp = comp_unit->shared_from_this();
}
else
{
if (GetDebugMapSymfile ())
{
// Let the debug map create the compile unit
cu_sp = m_debug_map_symfile->GetCompileUnit(this);
dwarf_cu->SetUserData(cu_sp.get());
}
else
{
ModuleSP module_sp (m_obj_file->GetModule());
if (module_sp)
{
const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly ();
if (cu_die)
{
const char * cu_die_name = cu_die->GetName(this, dwarf_cu);
const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
LanguageType cu_language = (LanguageType)cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
if (cu_die_name)
{
std::string ramapped_file;
FileSpec cu_file_spec;
if (cu_die_name[0] == '/' || cu_comp_dir == NULL || cu_comp_dir[0] == '\0')
{
// If we have a full path to the compile unit, we don't need to resolve
// the file. This can be expensive e.g. when the source files are NFS mounted.
if (module_sp->RemapSourceFile(cu_die_name, ramapped_file))
cu_file_spec.SetFile (ramapped_file.c_str(), false);
else
cu_file_spec.SetFile (cu_die_name, false);
}
else
{
// DWARF2/3 suggests the form hostname:pathname for compilation directory.
// Remove the host part if present.
cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
std::string fullpath(cu_comp_dir);
if (*fullpath.rbegin() != '/')
fullpath += '/';
fullpath += cu_die_name;
if (module_sp->RemapSourceFile (fullpath.c_str(), ramapped_file))
cu_file_spec.SetFile (ramapped_file.c_str(), false);
else
cu_file_spec.SetFile (fullpath.c_str(), false);
}
cu_sp.reset(new CompileUnit (module_sp,
dwarf_cu,
cu_file_spec,
MakeUserID(dwarf_cu->GetOffset()),
cu_language));
if (cu_sp)
{
dwarf_cu->SetUserData(cu_sp.get());
// Figure out the compile unit index if we weren't given one
if (cu_idx == UINT32_MAX)
DebugInfo()->GetCompileUnit(dwarf_cu->GetOffset(), &cu_idx);
m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex(cu_idx, cu_sp);
}
}
}
}
}
}
}
return cu_sp;
}
uint32_t
SymbolFileDWARF::GetNumCompileUnits()
{
DWARFDebugInfo* info = DebugInfo();
if (info)
return info->GetNumCompileUnits();
return 0;
}
CompUnitSP
SymbolFileDWARF::ParseCompileUnitAtIndex(uint32_t cu_idx)
{
CompUnitSP cu_sp;
DWARFDebugInfo* info = DebugInfo();
if (info)
{
DWARFCompileUnit* dwarf_cu = info->GetCompileUnitAtIndex(cu_idx);
if (dwarf_cu)
cu_sp = ParseCompileUnit(dwarf_cu, cu_idx);
}
return cu_sp;
}
Function *
SymbolFileDWARF::ParseCompileUnitFunction (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die)
{
DWARFDebugRanges::RangeList func_ranges;
const char *name = NULL;
const char *mangled = NULL;
int decl_file = 0;
int decl_line = 0;
int decl_column = 0;
int call_file = 0;
int call_line = 0;
int call_column = 0;
DWARFExpression frame_base;
assert (die->Tag() == DW_TAG_subprogram);
if (die->Tag() != DW_TAG_subprogram)
return NULL;
if (die->GetDIENamesAndRanges (this,
dwarf_cu,
name,
mangled,
func_ranges,
decl_file,
decl_line,
decl_column,
call_file,
call_line,
call_column,
&frame_base))
{
// Union of all ranges in the function DIE (if the function is discontiguous)
AddressRange func_range;
lldb::addr_t lowest_func_addr = func_ranges.GetMinRangeBase (0);
lldb::addr_t highest_func_addr = func_ranges.GetMaxRangeEnd (0);
if (lowest_func_addr != LLDB_INVALID_ADDRESS && lowest_func_addr <= highest_func_addr)
{
ModuleSP module_sp (m_obj_file->GetModule());
func_range.GetBaseAddress().ResolveAddressUsingFileSections (lowest_func_addr, module_sp->GetSectionList());
if (func_range.GetBaseAddress().IsValid())
func_range.SetByteSize(highest_func_addr - lowest_func_addr);
}
if (func_range.GetBaseAddress().IsValid())
{
Mangled func_name;
if (mangled)
func_name.SetValue(ConstString(mangled), true);
else if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()) &&
strcmp(name, "main") != 0)
{
// If the mangled name is not present in the DWARF, generate the demangled name
// using the decl context. We skip if the function is "main" as its name is
// never mangled.
bool is_static = false;
bool is_variadic = false;
unsigned type_quals = 0;
std::vector<ClangASTType> param_types;
std::vector<clang::ParmVarDecl*> param_decls;
const DWARFDebugInfoEntry *decl_ctx_die = NULL;
DWARFDeclContext decl_ctx;
StreamString sstr;
die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
sstr << decl_ctx.GetQualifiedName();
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(dwarf_cu,
die,
&decl_ctx_die);
ParseChildParameters(sc,
containing_decl_ctx,
dwarf_cu,
die,
true,
is_static,
is_variadic,
param_types,
param_decls,
type_quals);
sstr << "(";
for (size_t i = 0; i < param_types.size(); i++)
{
if (i > 0)
sstr << ", ";
sstr << param_types[i].GetTypeName();
}
if (is_variadic)
sstr << ", ...";
sstr << ")";
if (type_quals & clang::Qualifiers::Const)
sstr << " const";
func_name.SetValue(ConstString(sstr.GetData()), false);
}
else
func_name.SetValue(ConstString(name), false);
FunctionSP func_sp;
std::unique_ptr<Declaration> decl_ap;
if (decl_file != 0 || decl_line != 0 || decl_column != 0)
decl_ap.reset(new Declaration (sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
decl_line,
decl_column));
// Supply the type _only_ if it has already been parsed
Type *func_type = m_die_to_type.lookup (die);
assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
if (FixupAddress (func_range.GetBaseAddress()))
{
const user_id_t func_user_id = MakeUserID(die->GetOffset());
func_sp.reset(new Function (sc.comp_unit,
MakeUserID(func_user_id), // UserID is the DIE offset
MakeUserID(func_user_id),
func_name,
func_type,
func_range)); // first address range
if (func_sp.get() != NULL)
{
if (frame_base.IsValid())
func_sp->GetFrameBaseExpression() = frame_base;
sc.comp_unit->AddFunction(func_sp);
return func_sp.get();
}
}
}
}
return NULL;
}
bool
SymbolFileDWARF::FixupAddress (Address &addr)
{
SymbolFileDWARFDebugMap * debug_map_symfile = GetDebugMapSymfile ();
if (debug_map_symfile)
{
return debug_map_symfile->LinkOSOAddress(addr);
}
// This is a normal DWARF file, no address fixups need to happen
return true;
}
lldb::LanguageType
SymbolFileDWARF::ParseCompileUnitLanguage (const SymbolContext& sc)
{
assert (sc.comp_unit);
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
if (die)
{
const uint32_t language = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_language, 0);
if (language)
return (lldb::LanguageType)language;
}
}
return eLanguageTypeUnknown;
}
size_t
SymbolFileDWARF::ParseCompileUnitFunctions(const SymbolContext &sc)
{
assert (sc.comp_unit);
size_t functions_added = 0;
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
DWARFDIECollection function_dies;
const size_t num_functions = dwarf_cu->AppendDIEsWithTag (DW_TAG_subprogram, function_dies);
size_t func_idx;
for (func_idx = 0; func_idx < num_functions; ++func_idx)
{
const DWARFDebugInfoEntry *die = function_dies.GetDIEPtrAtIndex(func_idx);
if (sc.comp_unit->FindFunctionByUID (MakeUserID(die->GetOffset())).get() == NULL)
{
if (ParseCompileUnitFunction(sc, dwarf_cu, die))
++functions_added;
}
}
//FixupTypes();
}
return functions_added;
}
bool
SymbolFileDWARF::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList& support_files)
{
assert (sc.comp_unit);
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
const DWARFDebugInfoEntry * cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (cu_die)
{
const char * cu_comp_dir = cu_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_comp_dir, NULL);
// DWARF2/3 suggests the form hostname:pathname for compilation directory.
// Remove the host part if present.
cu_comp_dir = removeHostnameFromPathname(cu_comp_dir);
dw_offset_t stmt_list = cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
// All file indexes in DWARF are one based and a file of index zero is
// supposed to be the compile unit itself.
support_files.Append (*sc.comp_unit);
return DWARFDebugLine::ParseSupportFiles(sc.comp_unit->GetModule(), get_debug_line_data(), cu_comp_dir, stmt_list, support_files);
}
}
return false;
}
bool
SymbolFileDWARF::ParseImportedModules (const lldb_private::SymbolContext &sc, std::vector<lldb_private::ConstString> &imported_modules)
{
assert (sc.comp_unit);
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
if (ClangModulesDeclVendor::LanguageSupportsClangModules(sc.comp_unit->GetLanguage()))
{
UpdateExternalModuleListIfNeeded();
for (const std::pair<uint64_t, const ClangModuleInfo> &external_type_module : m_external_type_modules)
{
imported_modules.push_back(external_type_module.second.m_name);
}
}
}
return false;
}
struct ParseDWARFLineTableCallbackInfo
{
LineTable* line_table;
std::unique_ptr<LineSequence> sequence_ap;
};
//----------------------------------------------------------------------
// ParseStatementTableCallback
//----------------------------------------------------------------------
static void
ParseDWARFLineTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData)
{
if (state.row == DWARFDebugLine::State::StartParsingLineTable)
{
// Just started parsing the line table
}
else if (state.row == DWARFDebugLine::State::DoneParsingLineTable)
{
// Done parsing line table, nothing to do for the cleanup
}
else
{
ParseDWARFLineTableCallbackInfo* info = (ParseDWARFLineTableCallbackInfo*)userData;
LineTable* line_table = info->line_table;
// If this is our first time here, we need to create a
// sequence container.
if (!info->sequence_ap.get())
{
info->sequence_ap.reset(line_table->CreateLineSequenceContainer());
assert(info->sequence_ap.get());
}
line_table->AppendLineEntryToSequence (info->sequence_ap.get(),
state.address,
state.line,
state.column,
state.file,
state.is_stmt,
state.basic_block,
state.prologue_end,
state.epilogue_begin,
state.end_sequence);
if (state.end_sequence)
{
// First, put the current sequence into the line table.
line_table->InsertSequence(info->sequence_ap.get());
// Then, empty it to prepare for the next sequence.
info->sequence_ap->Clear();
}
}
}
bool
SymbolFileDWARF::ParseCompileUnitLineTable (const SymbolContext &sc)
{
assert (sc.comp_unit);
if (sc.comp_unit->GetLineTable() != NULL)
return true;
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->GetCompileUnitDIEOnly();
if (dwarf_cu_die)
{
const dw_offset_t cu_line_offset = dwarf_cu_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_stmt_list, DW_INVALID_OFFSET);
if (cu_line_offset != DW_INVALID_OFFSET)
{
std::unique_ptr<LineTable> line_table_ap(new LineTable(sc.comp_unit));
if (line_table_ap.get())
{
ParseDWARFLineTableCallbackInfo info;
info.line_table = line_table_ap.get();
lldb::offset_t offset = cu_line_offset;
DWARFDebugLine::ParseStatementTable(get_debug_line_data(), &offset, ParseDWARFLineTableCallback, &info);
if (m_debug_map_symfile)
{
// We have an object file that has a line table with addresses
// that are not linked. We need to link the line table and convert
// the addresses that are relative to the .o file into addresses
// for the main executable.
sc.comp_unit->SetLineTable (m_debug_map_symfile->LinkOSOLineTable (this, line_table_ap.get()));
}
else
{
sc.comp_unit->SetLineTable(line_table_ap.release());
return true;
}
}
}
}
}
return false;
}
size_t
SymbolFileDWARF::ParseFunctionBlocks
(
const SymbolContext& sc,
Block *parent_block,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
addr_t subprogram_low_pc,
uint32_t depth
)
{
size_t blocks_added = 0;
while (die != NULL)
{
dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_inlined_subroutine:
case DW_TAG_subprogram:
case DW_TAG_lexical_block:
{
Block *block = NULL;
if (tag == DW_TAG_subprogram)
{
// Skip any DW_TAG_subprogram DIEs that are inside
// of a normal or inlined functions. These will be
// parsed on their own as separate entities.
if (depth > 0)
break;
block = parent_block;
}
else
{
BlockSP block_sp(new Block (MakeUserID(die->GetOffset())));
parent_block->AddChild(block_sp);
block = block_sp.get();
}
DWARFDebugRanges::RangeList ranges;
const char *name = NULL;
const char *mangled_name = NULL;
int decl_file = 0;
int decl_line = 0;
int decl_column = 0;
int call_file = 0;
int call_line = 0;
int call_column = 0;
if (die->GetDIENamesAndRanges (this,
dwarf_cu,
name,
mangled_name,
ranges,
decl_file, decl_line, decl_column,
call_file, call_line, call_column))
{
if (tag == DW_TAG_subprogram)
{
assert (subprogram_low_pc == LLDB_INVALID_ADDRESS);
subprogram_low_pc = ranges.GetMinRangeBase(0);
}
else if (tag == DW_TAG_inlined_subroutine)
{
// We get called here for inlined subroutines in two ways.
// The first time is when we are making the Function object
// for this inlined concrete instance. Since we're creating a top level block at
// here, the subprogram_low_pc will be LLDB_INVALID_ADDRESS. So we need to
// adjust the containing address.
// The second time is when we are parsing the blocks inside the function that contains
// the inlined concrete instance. Since these will be blocks inside the containing "real"
// function the offset will be for that function.
if (subprogram_low_pc == LLDB_INVALID_ADDRESS)
{
subprogram_low_pc = ranges.GetMinRangeBase(0);
}
}
const size_t num_ranges = ranges.GetSize();
for (size_t i = 0; i<num_ranges; ++i)
{
const DWARFDebugRanges::Range &range = ranges.GetEntryRef (i);
const addr_t range_base = range.GetRangeBase();
if (range_base >= subprogram_low_pc)
block->AddRange(Block::Range (range_base - subprogram_low_pc, range.GetByteSize()));
else
{
GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": adding range [0x%" PRIx64 "-0x%" PRIx64 ") which has a base that is less than the function's low PC 0x%" PRIx64 ". Please file a bug and attach the file at the start of this error message",
block->GetID(),
range_base,
range.GetRangeEnd(),
subprogram_low_pc);
}
}
block->FinalizeRanges ();
if (tag != DW_TAG_subprogram && (name != NULL || mangled_name != NULL))
{
std::unique_ptr<Declaration> decl_ap;
if (decl_file != 0 || decl_line != 0 || decl_column != 0)
decl_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(decl_file),
decl_line, decl_column));
std::unique_ptr<Declaration> call_ap;
if (call_file != 0 || call_line != 0 || call_column != 0)
call_ap.reset(new Declaration(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(call_file),
call_line, call_column));
block->SetInlinedFunctionInfo (name, mangled_name, decl_ap.get(), call_ap.get());
}
++blocks_added;
if (die->HasChildren())
{
blocks_added += ParseFunctionBlocks (sc,
block,
dwarf_cu,
die->GetFirstChild(),
subprogram_low_pc,
depth + 1);
}
}
}
break;
default:
break;
}
// Only parse siblings of the block if we are not at depth zero. A depth
// of zero indicates we are currently parsing the top level
// DW_TAG_subprogram DIE
if (depth == 0)
die = NULL;
else
die = die->GetSibling();
}
return blocks_added;
}
bool
SymbolFileDWARF::ParseTemplateDIE (DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
ClangASTContext::TemplateParameterInfos &template_param_infos)
{
const dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_template_type_parameter:
case DW_TAG_template_value_parameter:
{
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_attributes = die->GetAttributes (this,
dwarf_cu,
fixed_form_sizes,
attributes);
const char *name = NULL;
Type *lldb_type = NULL;
ClangASTType clang_type;
uint64_t uval64 = 0;
bool uval64_valid = false;
if (num_attributes > 0)
{
DWARFFormValue form_value;
for (size_t i=0; i<num_attributes; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
switch (attr)
{
case DW_AT_name:
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
name = form_value.AsCString(&get_debug_str_data());
break;
case DW_AT_type:
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
const dw_offset_t type_die_offset = form_value.Reference();
lldb_type = ResolveTypeUID(type_die_offset);
if (lldb_type)
clang_type = lldb_type->GetClangForwardType();
}
break;
case DW_AT_const_value:
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
uval64_valid = true;
uval64 = form_value.Unsigned();
}
break;
default:
break;
}
}
clang::ASTContext *ast = GetClangASTContext().getASTContext();
if (!clang_type)
clang_type = GetClangASTContext().GetBasicType(eBasicTypeVoid);
if (clang_type)
{
bool is_signed = false;
if (name && name[0])
template_param_infos.names.push_back(name);
else
template_param_infos.names.push_back(NULL);
if (tag == DW_TAG_template_value_parameter &&
lldb_type != NULL &&
clang_type.IsIntegerType (is_signed) &&
uval64_valid)
{
llvm::APInt apint (lldb_type->GetByteSize() * 8, uval64, is_signed);
template_param_infos.args.push_back (clang::TemplateArgument (*ast,
llvm::APSInt(apint),
clang_type.GetQualType()));
}
else
{
template_param_infos.args.push_back (clang::TemplateArgument (clang_type.GetQualType()));
}
}
else
{
return false;
}
}
}
return true;
default:
break;
}
return false;
}
bool
SymbolFileDWARF::ParseTemplateParameterInfos (DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
ClangASTContext::TemplateParameterInfos &template_param_infos)
{
if (parent_die == NULL)
return false;
Args template_parameter_names;
for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild();
die != NULL;
die = die->GetSibling())
{
const dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_template_type_parameter:
case DW_TAG_template_value_parameter:
ParseTemplateDIE (dwarf_cu, die, template_param_infos);
break;
default:
break;
}
}
if (template_param_infos.args.empty())
return false;
return template_param_infos.args.size() == template_param_infos.names.size();
}
clang::ClassTemplateDecl *
SymbolFileDWARF::ParseClassTemplateDecl (clang::DeclContext *decl_ctx,
lldb::AccessType access_type,
const char *parent_name,
int tag_decl_kind,
const ClangASTContext::TemplateParameterInfos &template_param_infos)
{
if (template_param_infos.IsValid())
{
std::string template_basename(parent_name);
template_basename.erase (template_basename.find('<'));
ClangASTContext &ast = GetClangASTContext();
return ast.CreateClassTemplateDecl (decl_ctx,
access_type,
template_basename.c_str(),
tag_decl_kind,
template_param_infos);
}
return NULL;
}
class SymbolFileDWARF::DelayedAddObjCClassProperty
{
public:
DelayedAddObjCClassProperty
(
const ClangASTType &class_opaque_type,
const char *property_name,
const ClangASTType &property_opaque_type, // The property type is only required if you don't have an ivar decl
clang::ObjCIvarDecl *ivar_decl,
const char *property_setter_name,
const char *property_getter_name,
uint32_t property_attributes,
const ClangASTMetadata *metadata
) :
m_class_opaque_type (class_opaque_type),
m_property_name (property_name),
m_property_opaque_type (property_opaque_type),
m_ivar_decl (ivar_decl),
m_property_setter_name (property_setter_name),
m_property_getter_name (property_getter_name),
m_property_attributes (property_attributes)
{
if (metadata != NULL)
{
m_metadata_ap.reset(new ClangASTMetadata());
*m_metadata_ap = *metadata;
}
}
DelayedAddObjCClassProperty (const DelayedAddObjCClassProperty &rhs)
{
*this = rhs;
}
DelayedAddObjCClassProperty& operator= (const DelayedAddObjCClassProperty &rhs)
{
m_class_opaque_type = rhs.m_class_opaque_type;
m_property_name = rhs.m_property_name;
m_property_opaque_type = rhs.m_property_opaque_type;
m_ivar_decl = rhs.m_ivar_decl;
m_property_setter_name = rhs.m_property_setter_name;
m_property_getter_name = rhs.m_property_getter_name;
m_property_attributes = rhs.m_property_attributes;
if (rhs.m_metadata_ap.get())
{
m_metadata_ap.reset (new ClangASTMetadata());
*m_metadata_ap = *rhs.m_metadata_ap;
}
return *this;
}
bool
Finalize()
{
return m_class_opaque_type.AddObjCClassProperty (m_property_name,
m_property_opaque_type,
m_ivar_decl,
m_property_setter_name,
m_property_getter_name,
m_property_attributes,
m_metadata_ap.get());
}
private:
ClangASTType m_class_opaque_type;
const char *m_property_name;
ClangASTType m_property_opaque_type;
clang::ObjCIvarDecl *m_ivar_decl;
const char *m_property_setter_name;
const char *m_property_getter_name;
uint32_t m_property_attributes;
std::unique_ptr<ClangASTMetadata> m_metadata_ap;
};
struct BitfieldInfo
{
uint64_t bit_size;
uint64_t bit_offset;
BitfieldInfo () :
bit_size (LLDB_INVALID_ADDRESS),
bit_offset (LLDB_INVALID_ADDRESS)
{
}
void
Clear()
{
bit_size = LLDB_INVALID_ADDRESS;
bit_offset = LLDB_INVALID_ADDRESS;
}
bool IsValid ()
{
return (bit_size != LLDB_INVALID_ADDRESS) &&
(bit_offset != LLDB_INVALID_ADDRESS);
}
};
bool
SymbolFileDWARF::ClassOrStructIsVirtual (DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die)
{
if (parent_die)
{
for (const DWARFDebugInfoEntry *die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
{
dw_tag_t tag = die->Tag();
bool check_virtuality = false;
switch (tag)
{
case DW_TAG_inheritance:
case DW_TAG_subprogram:
check_virtuality = true;
break;
default:
break;
}
if (check_virtuality)
{
if (die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_virtuality, 0) != 0)
return true;
}
}
}
return false;
}
size_t
SymbolFileDWARF::ParseChildMembers
(
const SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
ClangASTType &class_clang_type,
const LanguageType class_language,
std::vector<clang::CXXBaseSpecifier *>& base_classes,
std::vector<int>& member_accessibilities,
DWARFDIECollection& member_function_dies,
DelayedPropertyList& delayed_properties,
AccessType& default_accessibility,
bool &is_a_class,
LayoutInfo &layout_info
)
{
if (parent_die == NULL)
return 0;
size_t count = 0;
const DWARFDebugInfoEntry *die;
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
uint32_t member_idx = 0;
BitfieldInfo last_field_info;
ModuleSP module = GetObjectFile()->GetModule();
for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
{
dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_member:
case DW_TAG_APPLE_property:
{
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_attributes = die->GetAttributes (this,
dwarf_cu,
fixed_form_sizes,
attributes);
if (num_attributes > 0)
{
Declaration decl;
//DWARFExpression location;
const char *name = NULL;
const char *prop_name = NULL;
const char *prop_getter_name = NULL;
const char *prop_setter_name = NULL;
uint32_t prop_attributes = 0;
bool is_artificial = false;
lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
AccessType accessibility = eAccessNone;
uint32_t member_byte_offset = UINT32_MAX;
size_t byte_size = 0;
size_t bit_offset = 0;
size_t bit_size = 0;
bool is_external = false; // On DW_TAG_members, this means the member is static
uint32_t i;
for (i=0; i<num_attributes && !is_artificial; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_type: encoding_uid = form_value.Reference(); break;
case DW_AT_bit_offset: bit_offset = form_value.Unsigned(); break;
case DW_AT_bit_size: bit_size = form_value.Unsigned(); break;
case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
case DW_AT_data_member_location:
if (form_value.BlockData())
{
Value initialValue(0);
Value memberOffset(0);
const DWARFDataExtractor& debug_info_data = get_debug_info_data();
uint32_t block_length = form_value.Unsigned();
uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
if (DWARFExpression::Evaluate(NULL, // ExecutionContext *
NULL, // ClangExpressionVariableList *
NULL, // ClangExpressionDeclMap *
NULL, // RegisterContext *
module,
debug_info_data,
block_offset,
block_length,
eRegisterKindDWARF,
&initialValue,
memberOffset,
NULL))
{
member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
}
}
else
{
// With DWARF 3 and later, if the value is an integer constant,
// this form value is the offset in bytes from the beginning
// of the containing entity.
member_byte_offset = form_value.Unsigned();
}
break;
case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType (form_value.Unsigned()); break;
case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
case DW_AT_APPLE_property_name: prop_name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_APPLE_property_attribute: prop_attributes = form_value.Unsigned(); break;
case DW_AT_external: is_external = form_value.Boolean(); break;
default:
case DW_AT_declaration:
case DW_AT_description:
case DW_AT_mutable:
case DW_AT_visibility:
case DW_AT_sibling:
break;
}
}
}
if (prop_name)
{
ConstString fixed_getter;
ConstString fixed_setter;
// Check if the property getter/setter were provided as full
// names. We want basenames, so we extract them.
if (prop_getter_name && prop_getter_name[0] == '-')
{
ObjCLanguageRuntime::MethodName prop_getter_method(prop_getter_name, true);
prop_getter_name = prop_getter_method.GetSelector().GetCString();
}
if (prop_setter_name && prop_setter_name[0] == '-')
{
ObjCLanguageRuntime::MethodName prop_setter_method(prop_setter_name, true);
prop_setter_name = prop_setter_method.GetSelector().GetCString();
}
// If the names haven't been provided, they need to be
// filled in.
if (!prop_getter_name)
{
prop_getter_name = prop_name;
}
if (!prop_setter_name && prop_name[0] && !(prop_attributes & DW_APPLE_PROPERTY_readonly))
{
StreamString ss;
ss.Printf("set%c%s:",
toupper(prop_name[0]),
&prop_name[1]);
fixed_setter.SetCString(ss.GetData());
prop_setter_name = fixed_setter.GetCString();
}
}
// Clang has a DWARF generation bug where sometimes it
// represents fields that are references with bad byte size
// and bit size/offset information such as:
//
// DW_AT_byte_size( 0x00 )
// DW_AT_bit_size( 0x40 )
// DW_AT_bit_offset( 0xffffffffffffffc0 )
//
// So check the bit offset to make sure it is sane, and if
// the values are not sane, remove them. If we don't do this
// then we will end up with a crash if we try to use this
// type in an expression when clang becomes unhappy with its
// recycled debug info.
if (bit_offset > 128)
{
bit_size = 0;
bit_offset = 0;
}
// FIXME: Make Clang ignore Objective-C accessibility for expressions
if (class_language == eLanguageTypeObjC ||
class_language == eLanguageTypeObjC_plus_plus)
accessibility = eAccessNone;
if (member_idx == 0 && !is_artificial && name && (strstr (name, "_vptr$") == name))
{
// Not all compilers will mark the vtable pointer
// member as artificial (llvm-gcc). We can't have
// the virtual members in our classes otherwise it
// throws off all child offsets since we end up
// having and extra pointer sized member in our
// class layouts.
is_artificial = true;
}
// Handle static members
if (is_external && member_byte_offset == UINT32_MAX)
{
Type *var_type = ResolveTypeUID(encoding_uid);
if (var_type)
{
if (accessibility == eAccessNone)
accessibility = eAccessPublic;
class_clang_type.AddVariableToRecordType (name,
var_type->GetClangLayoutType(),
accessibility);
}
break;
}
if (is_artificial == false)
{
Type *member_type = ResolveTypeUID(encoding_uid);
clang::FieldDecl *field_decl = NULL;
if (tag == DW_TAG_member)
{
if (member_type)
{
if (accessibility == eAccessNone)
accessibility = default_accessibility;
member_accessibilities.push_back(accessibility);
uint64_t field_bit_offset = (member_byte_offset == UINT32_MAX ? 0 : (member_byte_offset * 8));
if (bit_size > 0)
{
BitfieldInfo this_field_info;
this_field_info.bit_offset = field_bit_offset;
this_field_info.bit_size = bit_size;
/////////////////////////////////////////////////////////////
// How to locate a field given the DWARF debug information
//
// AT_byte_size indicates the size of the word in which the
// bit offset must be interpreted.
//
// AT_data_member_location indicates the byte offset of the
// word from the base address of the structure.
//
// AT_bit_offset indicates how many bits into the word
// (according to the host endianness) the low-order bit of
// the field starts. AT_bit_offset can be negative.
//
// AT_bit_size indicates the size of the field in bits.
/////////////////////////////////////////////////////////////
if (byte_size == 0)
byte_size = member_type->GetByteSize();
if (GetObjectFile()->GetByteOrder() == eByteOrderLittle)
{
this_field_info.bit_offset += byte_size * 8;
this_field_info.bit_offset -= (bit_offset + bit_size);
}
else
{
this_field_info.bit_offset += bit_offset;
}
// Update the field bit offset we will report for layout
field_bit_offset = this_field_info.bit_offset;
// If the member to be emitted did not start on a character boundary and there is
// empty space between the last field and this one, then we need to emit an
// anonymous member filling up the space up to its start. There are three cases
// here:
//
// 1 If the previous member ended on a character boundary, then we can emit an
// anonymous member starting at the most recent character boundary.
//
// 2 If the previous member did not end on a character boundary and the distance
// from the end of the previous member to the current member is less than a
// word width, then we can emit an anonymous member starting right after the
// previous member and right before this member.
//
// 3 If the previous member did not end on a character boundary and the distance
// from the end of the previous member to the current member is greater than
// or equal a word width, then we act as in Case 1.
const uint64_t character_width = 8;
const uint64_t word_width = 32;
// Objective-C has invalid DW_AT_bit_offset values in older versions
// of clang, so we have to be careful and only insert unnamed bitfields
// if we have a new enough clang.
bool detect_unnamed_bitfields = true;
if (class_language == eLanguageTypeObjC || class_language == eLanguageTypeObjC_plus_plus)
detect_unnamed_bitfields = dwarf_cu->Supports_unnamed_objc_bitfields ();
if (detect_unnamed_bitfields)
{
BitfieldInfo anon_field_info;
if ((this_field_info.bit_offset % character_width) != 0) // not char aligned
{
uint64_t last_field_end = 0;
if (last_field_info.IsValid())
last_field_end = last_field_info.bit_offset + last_field_info.bit_size;
if (this_field_info.bit_offset != last_field_end)
{
if (((last_field_end % character_width) == 0) || // case 1
(this_field_info.bit_offset - last_field_end >= word_width)) // case 3
{
anon_field_info.bit_size = this_field_info.bit_offset % character_width;
anon_field_info.bit_offset = this_field_info.bit_offset - anon_field_info.bit_size;
}
else // case 2
{
anon_field_info.bit_size = this_field_info.bit_offset - last_field_end;
anon_field_info.bit_offset = last_field_end;
}
}
}
if (anon_field_info.IsValid())
{
clang::FieldDecl *unnamed_bitfield_decl = class_clang_type.AddFieldToRecordType (NULL,
GetClangASTContext().GetBuiltinTypeForEncodingAndBitSize(eEncodingSint, word_width),
accessibility,
anon_field_info.bit_size);
layout_info.field_offsets.insert(
std::make_pair(unnamed_bitfield_decl, anon_field_info.bit_offset));
}
}
last_field_info = this_field_info;
}
else
{
last_field_info.Clear();
}
ClangASTType member_clang_type = member_type->GetClangLayoutType();
{
// Older versions of clang emit array[0] and array[1] in the same way (<rdar://problem/12566646>).
// If the current field is at the end of the structure, then there is definitely no room for extra
// elements and we override the type to array[0].
ClangASTType member_array_element_type;
uint64_t member_array_size;
bool member_array_is_incomplete;
if (member_clang_type.IsArrayType(&member_array_element_type,
&member_array_size,
&member_array_is_incomplete) &&
!member_array_is_incomplete)
{
uint64_t parent_byte_size = parent_die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, UINT64_MAX);
if (member_byte_offset >= parent_byte_size)
{
if (member_array_size != 1)
{
GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which extends beyond the bounds of 0x%8.8" PRIx64,
MakeUserID(die->GetOffset()),
name,
encoding_uid,
MakeUserID(parent_die->GetOffset()));
}
member_clang_type = GetClangASTContext().CreateArrayType(member_array_element_type, 0, false);
}
}
}
field_decl = class_clang_type.AddFieldToRecordType (name,
member_clang_type,
accessibility,
bit_size);
GetClangASTContext().SetMetadataAsUserID (field_decl, MakeUserID(die->GetOffset()));
layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
}
else
{
if (name)
GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
MakeUserID(die->GetOffset()),
name,
encoding_uid);
else
GetObjectFile()->GetModule()->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
MakeUserID(die->GetOffset()),
encoding_uid);
}
}
if (prop_name != NULL)
{
clang::ObjCIvarDecl *ivar_decl = NULL;
if (field_decl)
{
ivar_decl = clang::dyn_cast<clang::ObjCIvarDecl>(field_decl);
assert (ivar_decl != NULL);
}
ClangASTMetadata metadata;
metadata.SetUserID (MakeUserID(die->GetOffset()));
delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
prop_name,
member_type->GetClangLayoutType(),
ivar_decl,
prop_setter_name,
prop_getter_name,
prop_attributes,
&metadata));
if (ivar_decl)
GetClangASTContext().SetMetadataAsUserID (ivar_decl, MakeUserID(die->GetOffset()));
}
}
}
++member_idx;
}
break;
case DW_TAG_subprogram:
// Let the type parsing code handle this one for us.
member_function_dies.Append (die);
break;
case DW_TAG_inheritance:
{
is_a_class = true;
if (default_accessibility == eAccessNone)
default_accessibility = eAccessPrivate;
// TODO: implement DW_TAG_inheritance type parsing
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_attributes = die->GetAttributes (this,
dwarf_cu,
fixed_form_sizes,
attributes);
if (num_attributes > 0)
{
Declaration decl;
DWARFExpression location;
lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
AccessType accessibility = default_accessibility;
bool is_virtual = false;
bool is_base_of_class = true;
off_t member_byte_offset = 0;
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_type: encoding_uid = form_value.Reference(); break;
case DW_AT_data_member_location:
if (form_value.BlockData())
{
Value initialValue(0);
Value memberOffset(0);
const DWARFDataExtractor& debug_info_data = get_debug_info_data();
uint32_t block_length = form_value.Unsigned();
uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
if (DWARFExpression::Evaluate (NULL,
NULL,
NULL,
NULL,
module,
debug_info_data,
block_offset,
block_length,
eRegisterKindDWARF,
&initialValue,
memberOffset,
NULL))
{
member_byte_offset = memberOffset.ResolveValue(NULL).UInt();
}
}
else
{
// With DWARF 3 and later, if the value is an integer constant,
// this form value is the offset in bytes from the beginning
// of the containing entity.
member_byte_offset = form_value.Unsigned();
}
break;
case DW_AT_accessibility:
accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
break;
case DW_AT_virtuality:
is_virtual = form_value.Boolean();
break;
case DW_AT_sibling:
break;
default:
break;
}
}
}
Type *base_class_type = ResolveTypeUID(encoding_uid);
assert(base_class_type);
ClangASTType base_class_clang_type = base_class_type->GetClangFullType();
assert (base_class_clang_type);
if (class_language == eLanguageTypeObjC)
{
class_clang_type.SetObjCSuperClass(base_class_clang_type);
}
else
{
base_classes.push_back (base_class_clang_type.CreateBaseClassSpecifier (accessibility,
is_virtual,
is_base_of_class));
if (is_virtual)
{
// Do not specify any offset for virtual inheritance. The DWARF produced by clang doesn't
// give us a constant offset, but gives us a DWARF expressions that requires an actual object
// in memory. the DW_AT_data_member_location for a virtual base class looks like:
// DW_AT_data_member_location( DW_OP_dup, DW_OP_deref, DW_OP_constu(0x00000018), DW_OP_minus, DW_OP_deref, DW_OP_plus )
// Given this, there is really no valid response we can give to clang for virtual base
// class offsets, and this should eventually be removed from LayoutRecordType() in the external
// AST source in clang.
}
else
{
layout_info.base_offsets.insert(
std::make_pair(base_class_clang_type.GetAsCXXRecordDecl(),
clang::CharUnits::fromQuantity(member_byte_offset)));
}
}
}
}
break;
default:
break;
}
}
return count;
}
clang::DeclContext*
SymbolFileDWARF::GetClangDeclContextContainingTypeUID (lldb::user_id_t type_uid)
{
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info && UserIDMatches(type_uid))
{
DWARFCompileUnitSP cu_sp;
const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(type_uid, &cu_sp);
if (die)
return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
}
return NULL;
}
clang::DeclContext*
SymbolFileDWARF::GetClangDeclContextForTypeUID (const lldb_private::SymbolContext &sc, lldb::user_id_t type_uid)
{
if (UserIDMatches(type_uid))
return GetClangDeclContextForDIEOffset (sc, type_uid);
return NULL;
}
Type*
SymbolFileDWARF::ResolveTypeUID (lldb::user_id_t type_uid)
{
if (UserIDMatches(type_uid))
{
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info)
{
DWARFCompileUnitSP cu_sp;
const DWARFDebugInfoEntry* type_die = debug_info->GetDIEPtr(type_uid, &cu_sp);
const bool assert_not_being_parsed = true;
return ResolveTypeUID (cu_sp.get(), type_die, assert_not_being_parsed);
}
}
return NULL;
}
Type*
SymbolFileDWARF::ResolveTypeUID (DWARFCompileUnit* cu, const DWARFDebugInfoEntry* die, bool assert_not_being_parsed)
{
if (die != NULL)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log)
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s'",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, cu));
// We might be coming in in the middle of a type tree (a class
// withing a class, an enum within a class), so parse any needed
// parent DIEs before we get to this one...
const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
switch (decl_ctx_die->Tag())
{
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
{
// Get the type, which could be a forward declaration
if (log)
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent forward type for 0x%8.8x",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, cu),
decl_ctx_die->GetOffset());
//
// Type *parent_type = ResolveTypeUID (cu, decl_ctx_die, assert_not_being_parsed);
// if (child_requires_parent_class_union_or_struct_to_be_completed(die->Tag()))
// {
// if (log)
// GetObjectFile()->GetModule()->LogMessage (log,
// "SymbolFileDWARF::ResolveTypeUID (die = 0x%8.8x) %s '%s' resolve parent full type for 0x%8.8x since die is a function",
// die->GetOffset(),
// DW_TAG_value_to_name(die->Tag()),
// die->GetName(this, cu),
// decl_ctx_die->GetOffset());
// // Ask the type to complete itself if it already hasn't since if we
// // want a function (method or static) from a class, the class must
// // create itself and add it's own methods and class functions.
// if (parent_type)
// parent_type->GetClangFullType();
// }
}
break;
default:
break;
}
return ResolveType (cu, die);
}
return NULL;
}
// This function is used when SymbolFileDWARFDebugMap owns a bunch of
// SymbolFileDWARF objects to detect if this DWARF file is the one that
// can resolve a clang_type.
bool
SymbolFileDWARF::HasForwardDeclForClangType (const ClangASTType &clang_type)
{
ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
return die != NULL;
}
bool
SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (ClangASTType &clang_type)
{
// We have a struct/union/class/enum that needs to be fully resolved.
ClangASTType clang_type_no_qualifiers = clang_type.RemoveFastQualifiers();
const DWARFDebugInfoEntry* die = m_forward_decl_clang_type_to_die.lookup (clang_type_no_qualifiers.GetOpaqueQualType());
if (die == NULL)
{
// We have already resolved this type...
return true;
}
// Once we start resolving this type, remove it from the forward declaration
// map in case anyone child members or other types require this type to get resolved.
// The type will get resolved when all of the calls to SymbolFileDWARF::ResolveClangOpaqueTypeDefinition
// are done.
m_forward_decl_clang_type_to_die.erase (clang_type_no_qualifiers.GetOpaqueQualType());
// Disable external storage for this type so we don't get anymore
// clang::ExternalASTSource queries for this type.
clang_type.SetHasExternalStorage (false);
DWARFDebugInfo* debug_info = DebugInfo();
DWARFCompileUnit *dwarf_cu = debug_info->GetCompileUnitContainingDIE (die->GetOffset()).get();
Type *type = m_die_to_type.lookup (die);
const dw_tag_t tag = die->Tag();
Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
if (log)
GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
"0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
MakeUserID(die->GetOffset()),
DW_TAG_value_to_name(tag),
type->GetName().AsCString());
assert (clang_type);
DWARFDebugInfoEntry::Attributes attributes;
switch (tag)
{
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
{
LayoutInfo layout_info;
{
if (die->HasChildren())
{
LanguageType class_language = eLanguageTypeUnknown;
if (clang_type.IsObjCObjectOrInterfaceType())
{
class_language = eLanguageTypeObjC;
// For objective C we don't start the definition when
// the class is created.
clang_type.StartTagDeclarationDefinition ();
}
int tag_decl_kind = -1;
AccessType default_accessibility = eAccessNone;
if (tag == DW_TAG_structure_type)
{
tag_decl_kind = clang::TTK_Struct;
default_accessibility = eAccessPublic;
}
else if (tag == DW_TAG_union_type)
{
tag_decl_kind = clang::TTK_Union;
default_accessibility = eAccessPublic;
}
else if (tag == DW_TAG_class_type)
{
tag_decl_kind = clang::TTK_Class;
default_accessibility = eAccessPrivate;
}
SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
std::vector<clang::CXXBaseSpecifier *> base_classes;
std::vector<int> member_accessibilities;
bool is_a_class = false;
// Parse members and base classes first
DWARFDIECollection member_function_dies;
DelayedPropertyList delayed_properties;
ParseChildMembers (sc,
dwarf_cu,
die,
clang_type,
class_language,
base_classes,
member_accessibilities,
member_function_dies,
delayed_properties,
default_accessibility,
is_a_class,
layout_info);
// Now parse any methods if there were any...
size_t num_functions = member_function_dies.Size();
if (num_functions > 0)
{
for (size_t i=0; i<num_functions; ++i)
{
ResolveType(dwarf_cu, member_function_dies.GetDIEPtrAtIndex(i));
}
}
if (class_language == eLanguageTypeObjC)
{
ConstString class_name (clang_type.GetTypeName());
if (class_name)
{
DIEArray method_die_offsets;
if (m_using_apple_tables)
{
if (m_apple_objc_ap.get())
m_apple_objc_ap->FindByName(class_name.GetCString(), method_die_offsets);
}
else
{
if (!m_indexed)
Index ();
m_objc_class_selectors_index.Find (class_name, method_die_offsets);
}
if (!method_die_offsets.empty())
{
DWARFDebugInfo* debug_info = DebugInfo();
DWARFCompileUnit* method_cu = NULL;
const size_t num_matches = method_die_offsets.size();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = method_die_offsets[i];
DWARFDebugInfoEntry *method_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &method_cu);
if (method_die)
ResolveType (method_cu, method_die);
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_objc accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, class_name.GetCString());
}
}
}
}
for (DelayedPropertyList::iterator pi = delayed_properties.begin(), pe = delayed_properties.end();
pi != pe;
++pi)
pi->Finalize();
}
}
// If we have a DW_TAG_structure_type instead of a DW_TAG_class_type we
// need to tell the clang type it is actually a class.
if (class_language != eLanguageTypeObjC)
{
if (is_a_class && tag_decl_kind != clang::TTK_Class)
clang_type.SetTagTypeKind (clang::TTK_Class);
}
// Since DW_TAG_structure_type gets used for both classes
// and structures, we may need to set any DW_TAG_member
// fields to have a "private" access if none was specified.
// When we parsed the child members we tracked that actual
// accessibility value for each DW_TAG_member in the
// "member_accessibilities" array. If the value for the
// member is zero, then it was set to the "default_accessibility"
// which for structs was "public". Below we correct this
// by setting any fields to "private" that weren't correctly
// set.
if (is_a_class && !member_accessibilities.empty())
{
// This is a class and all members that didn't have
// their access specified are private.
clang_type.SetDefaultAccessForRecordFields (eAccessPrivate,
&member_accessibilities.front(),
member_accessibilities.size());
}
if (!base_classes.empty())
{
// Make sure all base classes refer to complete types and not
// forward declarations. If we don't do this, clang will crash
// with an assertion in the call to clang_type.SetBaseClassesForClassType()
bool base_class_error = false;
for (auto &base_class : base_classes)
{
clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
if (type_source_info)
{
ClangASTType base_class_type (GetClangASTContext().getASTContext(), type_source_info->getType());
if (base_class_type.GetCompleteType() == false)
{
if (!base_class_error)
{
GetObjectFile()->GetModule()->ReportError ("DWARF DIE at 0x%8.8x for class '%s' has a base class '%s' that is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
die->GetOffset(),
die->GetName(this, dwarf_cu),
base_class_type.GetTypeName().GetCString(),
sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
}
// We have no choice other than to pretend that the base class
// is complete. If we don't do this, clang will crash when we
// call setBases() inside of "clang_type.SetBaseClassesForClassType()"
// below. Since we provide layout assistance, all ivars in this
// class and other classes will be fine, this is the best we can do
// short of crashing.
base_class_type.StartTagDeclarationDefinition ();
base_class_type.CompleteTagDeclarationDefinition ();
}
}
}
clang_type.SetBaseClassesForClassType (&base_classes.front(),
base_classes.size());
// Clang will copy each CXXBaseSpecifier in "base_classes"
// so we have to free them all.
ClangASTType::DeleteBaseClassSpecifiers (&base_classes.front(),
base_classes.size());
}
}
}
clang_type.BuildIndirectFields ();
clang_type.CompleteTagDeclarationDefinition ();
if (!layout_info.field_offsets.empty() ||
!layout_info.base_offsets.empty() ||
!layout_info.vbase_offsets.empty() )
{
if (type)
layout_info.bit_size = type->GetByteSize() * 8;
if (layout_info.bit_size == 0)
layout_info.bit_size = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_byte_size, 0) * 8;
clang::CXXRecordDecl *record_decl = clang_type.GetAsCXXRecordDecl();
if (record_decl)
{
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) caching layout info for record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u], base_offsets[%u], vbase_offsets[%u])",
static_cast<void*>(clang_type.GetOpaqueQualType()),
static_cast<void*>(record_decl),
layout_info.bit_size,
layout_info.alignment,
static_cast<uint32_t>(layout_info.field_offsets.size()),
static_cast<uint32_t>(layout_info.base_offsets.size()),
static_cast<uint32_t>(layout_info.vbase_offsets.size()));
uint32_t idx;
{
llvm::DenseMap<const clang::FieldDecl *, uint64_t>::const_iterator pos,
end = layout_info.field_offsets.end();
for (idx = 0, pos = layout_info.field_offsets.begin(); pos != end; ++pos, ++idx)
{
GetObjectFile()->GetModule()->LogMessage(
log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) field[%u] = "
"{ bit_offset=%u, name='%s' }",
static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
static_cast<uint32_t>(pos->second), pos->first->getNameAsString().c_str());
}
}
{
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator base_pos,
base_end = layout_info.base_offsets.end();
for (idx = 0, base_pos = layout_info.base_offsets.begin(); base_pos != base_end;
++base_pos, ++idx)
{
GetObjectFile()->GetModule()->LogMessage(
log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) base[%u] "
"= { byte_offset=%u, name='%s' }",
clang_type.GetOpaqueQualType(), idx, (uint32_t)base_pos->second.getQuantity(),
base_pos->first->getNameAsString().c_str());
}
}
{
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>::const_iterator vbase_pos,
vbase_end = layout_info.vbase_offsets.end();
for (idx = 0, vbase_pos = layout_info.vbase_offsets.begin(); vbase_pos != vbase_end;
++vbase_pos, ++idx)
{
GetObjectFile()->GetModule()->LogMessage(
log, "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition (clang_type = %p) "
"vbase[%u] = { byte_offset=%u, name='%s' }",
static_cast<void *>(clang_type.GetOpaqueQualType()), idx,
static_cast<uint32_t>(vbase_pos->second.getQuantity()),
vbase_pos->first->getNameAsString().c_str());
}
}
}
m_record_decl_to_layout_map.insert(std::make_pair(record_decl, layout_info));
}
}
}
return (bool)clang_type;
case DW_TAG_enumeration_type:
clang_type.StartTagDeclarationDefinition ();
if (die->HasChildren())
{
SymbolContext sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
bool is_signed = false;
clang_type.IsIntegerType(is_signed);
ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), dwarf_cu, die);
}
clang_type.CompleteTagDeclarationDefinition ();
return (bool)clang_type;
default:
assert(false && "not a forward clang type decl!");
break;
}
return false;
}
Type*
SymbolFileDWARF::ResolveType (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* type_die, bool assert_not_being_parsed)
{
if (type_die != NULL)
{
Type *type = m_die_to_type.lookup (type_die);
if (type == NULL)
type = GetTypeForDIE (dwarf_cu, type_die).get();
if (assert_not_being_parsed)
{
if (type != DIE_IS_BEING_PARSED)
return type;
GetObjectFile()->GetModule()->ReportError ("Parsing a die that is being parsed die: 0x%8.8x: %s %s",
type_die->GetOffset(),
DW_TAG_value_to_name(type_die->Tag()),
type_die->GetName(this, dwarf_cu));
}
else
return type;
}
return NULL;
}
CompileUnit*
SymbolFileDWARF::GetCompUnitForDWARFCompUnit (DWARFCompileUnit* dwarf_cu, uint32_t cu_idx)
{
// Check if the symbol vendor already knows about this compile unit?
if (dwarf_cu->GetUserData() == NULL)
{
// The symbol vendor doesn't know about this compile unit, we
// need to parse and add it to the symbol vendor object.
return ParseCompileUnit(dwarf_cu, cu_idx).get();
}
return (CompileUnit*)dwarf_cu->GetUserData();
}
bool
SymbolFileDWARF::GetFunction (DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry* func_die, SymbolContext& sc)
{
sc.Clear(false);
// Check if the symbol vendor already knows about this compile unit?
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(func_die->GetOffset())).get();
if (sc.function == NULL)
sc.function = ParseCompileUnitFunction(sc, dwarf_cu, func_die);
if (sc.function)
{
sc.module_sp = sc.function->CalculateSymbolContextModule();
return true;
}
return false;
}
void
SymbolFileDWARF::UpdateExternalModuleListIfNeeded()
{
if (m_fetched_external_modules)
return;
m_fetched_external_modules = true;
DWARFDebugInfo * debug_info = DebugInfo();
debug_info->GetNumCompileUnits();
const uint32_t num_compile_units = GetNumCompileUnits();
for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
{
DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
const DWARFDebugInfoEntry *die = dwarf_cu->GetCompileUnitDIEOnly();
if (die && die->HasChildren() == false)
{
const uint64_t name_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_name, UINT64_MAX);
const uint64_t dwo_path_strp = die->GetAttributeValueAsUnsigned(this, dwarf_cu, DW_AT_GNU_dwo_name, UINT64_MAX);
if (name_strp != UINT64_MAX)
{
if (m_external_type_modules.find(dwo_path_strp) == m_external_type_modules.end())
{
const char *name = get_debug_str_data().PeekCStr(name_strp);
const char *dwo_path = get_debug_str_data().PeekCStr(dwo_path_strp);
if (name || dwo_path)
{
ModuleSP module_sp;
if (dwo_path)
{
ModuleSpec dwo_module_spec;
dwo_module_spec.GetFileSpec().SetFile(dwo_path, false);
dwo_module_spec.GetArchitecture() = m_obj_file->GetModule()->GetArchitecture();
//printf ("Loading dwo = '%s'\n", dwo_path);
Error error = ModuleList::GetSharedModule (dwo_module_spec, module_sp, NULL, NULL, NULL);
}
if (dwo_path_strp != LLDB_INVALID_UID)
{
m_external_type_modules[dwo_path_strp] = ClangModuleInfo { ConstString(name), module_sp };
}
else
{
// This hack should be removed promptly once clang emits both.
m_external_type_modules[name_strp] = ClangModuleInfo { ConstString(name), module_sp };
}
}
}
}
}
}
}
SymbolFileDWARF::GlobalVariableMap &
SymbolFileDWARF::GetGlobalAranges()
{
if (!m_global_aranges_ap)
{
m_global_aranges_ap.reset (new GlobalVariableMap());
ModuleSP module_sp = GetObjectFile()->GetModule();
if (module_sp)
{
const size_t num_cus = module_sp->GetNumCompileUnits();
for (size_t i = 0; i < num_cus; ++i)
{
CompUnitSP cu_sp = module_sp->GetCompileUnitAtIndex(i);
if (cu_sp)
{
VariableListSP globals_sp = cu_sp->GetVariableList(true);
if (globals_sp)
{
const size_t num_globals = globals_sp->GetSize();
for (size_t g = 0; g < num_globals; ++g)
{
VariableSP var_sp = globals_sp->GetVariableAtIndex(g);
if (var_sp && !var_sp->GetLocationIsConstantValueData())
{
const DWARFExpression &location = var_sp->LocationExpression();
Value location_result;
Error error;
if (location.Evaluate(NULL, NULL, NULL, LLDB_INVALID_ADDRESS, NULL, location_result, &error))
{
if (location_result.GetValueType() == Value::eValueTypeFileAddress)
{
lldb::addr_t file_addr = location_result.GetScalar().ULongLong();
lldb::addr_t byte_size = 1;
if (var_sp->GetType())
byte_size = var_sp->GetType()->GetByteSize();
m_global_aranges_ap->Append(GlobalVariableMap::Entry(file_addr, byte_size, var_sp.get()));
}
}
}
}
}
}
}
}
m_global_aranges_ap->Sort();
}
return *m_global_aranges_ap;
}
uint32_t
SymbolFileDWARF::ResolveSymbolContext (const Address& so_addr, uint32_t resolve_scope, SymbolContext& sc)
{
Timer scoped_timer(__PRETTY_FUNCTION__,
"SymbolFileDWARF::ResolveSymbolContext (so_addr = { section = %p, offset = 0x%" PRIx64 " }, resolve_scope = 0x%8.8x)",
static_cast<void*>(so_addr.GetSection().get()),
so_addr.GetOffset(), resolve_scope);
uint32_t resolved = 0;
if (resolve_scope & ( eSymbolContextCompUnit |
eSymbolContextFunction |
eSymbolContextBlock |
eSymbolContextLineEntry |
eSymbolContextVariable ))
{
lldb::addr_t file_vm_addr = so_addr.GetFileAddress();
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info)
{
const dw_offset_t cu_offset = debug_info->GetCompileUnitAranges().FindAddress(file_vm_addr);
if (cu_offset == DW_INVALID_OFFSET)
{
// Global variables are not in the compile unit address ranges. The only way to
// currently find global variables is to iterate over the .debug_pubnames or the
// __apple_names table and find all items in there that point to DW_TAG_variable
// DIEs and then find the address that matches.
if (resolve_scope & eSymbolContextVariable)
{
GlobalVariableMap &map = GetGlobalAranges();
const GlobalVariableMap::Entry *entry = map.FindEntryThatContains(file_vm_addr);
if (entry && entry->data)
{
Variable *variable = entry->data;
SymbolContextScope *scc = variable->GetSymbolContextScope();
if (scc)
{
scc->CalculateSymbolContext(&sc);
sc.variable = variable;
}
return sc.GetResolvedMask();
}
}
}
else
{
uint32_t cu_idx = DW_INVALID_INDEX;
DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnit(cu_offset, &cu_idx).get();
if (dwarf_cu)
{
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
if (sc.comp_unit)
{
resolved |= eSymbolContextCompUnit;
bool force_check_line_table = false;
if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
{
DWARFDebugInfoEntry *function_die = NULL;
DWARFDebugInfoEntry *block_die = NULL;
if (resolve_scope & eSymbolContextBlock)
{
dwarf_cu->LookupAddress(file_vm_addr, &function_die, &block_die);
}
else
{
dwarf_cu->LookupAddress(file_vm_addr, &function_die, NULL);
}
if (function_die != NULL)
{
sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
if (sc.function == NULL)
sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
}
else
{
// We might have had a compile unit that had discontiguous
// address ranges where the gaps are symbols that don't have
// any debug info. Discontiguous compile unit address ranges
// should only happen when there aren't other functions from
// other compile units in these gaps. This helps keep the size
// of the aranges down.
force_check_line_table = true;
}
if (sc.function != NULL)
{
resolved |= eSymbolContextFunction;
if (resolve_scope & eSymbolContextBlock)
{
Block& block = sc.function->GetBlock (true);
if (block_die != NULL)
sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
else
sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
if (sc.block)
resolved |= eSymbolContextBlock;
}
}
}
if ((resolve_scope & eSymbolContextLineEntry) || force_check_line_table)
{
LineTable *line_table = sc.comp_unit->GetLineTable();
if (line_table != NULL)
{
// And address that makes it into this function should be in terms
// of this debug file if there is no debug map, or it will be an
// address in the .o file which needs to be fixed up to be in terms
// of the debug map executable. Either way, calling FixupAddress()
// will work for us.
Address exe_so_addr (so_addr);
if (FixupAddress(exe_so_addr))
{
if (line_table->FindLineEntryByAddress (exe_so_addr, sc.line_entry))
{
resolved |= eSymbolContextLineEntry;
}
}
}
}
if (force_check_line_table && !(resolved & eSymbolContextLineEntry))
{
// We might have had a compile unit that had discontiguous
// address ranges where the gaps are symbols that don't have
// any debug info. Discontiguous compile unit address ranges
// should only happen when there aren't other functions from
// other compile units in these gaps. This helps keep the size
// of the aranges down.
sc.comp_unit = NULL;
resolved &= ~eSymbolContextCompUnit;
}
}
else
{
GetObjectFile()->GetModule()->ReportWarning ("0x%8.8x: compile unit %u failed to create a valid lldb_private::CompileUnit class.",
cu_offset,
cu_idx);
}
}
}
}
}
return resolved;
}
uint32_t
SymbolFileDWARF::ResolveSymbolContext(const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list)
{
const uint32_t prev_size = sc_list.GetSize();
if (resolve_scope & eSymbolContextCompUnit)
{
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info)
{
uint32_t cu_idx;
DWARFCompileUnit* dwarf_cu = NULL;
for (cu_idx = 0; (dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx)) != NULL; ++cu_idx)
{
CompileUnit *dc_cu = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
const bool full_match = (bool)file_spec.GetDirectory();
bool file_spec_matches_cu_file_spec = dc_cu != NULL && FileSpec::Equal(file_spec, *dc_cu, full_match);
if (check_inlines || file_spec_matches_cu_file_spec)
{
SymbolContext sc (m_obj_file->GetModule());
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, cu_idx);
if (sc.comp_unit)
{
uint32_t file_idx = UINT32_MAX;
// If we are looking for inline functions only and we don't
// find it in the support files, we are done.
if (check_inlines)
{
file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
if (file_idx == UINT32_MAX)
continue;
}
if (line != 0)
{
LineTable *line_table = sc.comp_unit->GetLineTable();
if (line_table != NULL && line != 0)
{
// We will have already looked up the file index if
// we are searching for inline entries.
if (!check_inlines)
file_idx = sc.comp_unit->GetSupportFiles().FindFileIndex (1, file_spec, true);
if (file_idx != UINT32_MAX)
{
uint32_t found_line;
uint32_t line_idx = line_table->FindLineEntryIndexByFileIndex (0, file_idx, line, false, &sc.line_entry);
found_line = sc.line_entry.line;
while (line_idx != UINT32_MAX)
{
sc.function = NULL;
sc.block = NULL;
if (resolve_scope & (eSymbolContextFunction | eSymbolContextBlock))
{
const lldb::addr_t file_vm_addr = sc.line_entry.range.GetBaseAddress().GetFileAddress();
if (file_vm_addr != LLDB_INVALID_ADDRESS)
{
DWARFDebugInfoEntry *function_die = NULL;
DWARFDebugInfoEntry *block_die = NULL;
dwarf_cu->LookupAddress(file_vm_addr, &function_die, resolve_scope & eSymbolContextBlock ? &block_die : NULL);
if (function_die != NULL)
{
sc.function = sc.comp_unit->FindFunctionByUID (MakeUserID(function_die->GetOffset())).get();
if (sc.function == NULL)
sc.function = ParseCompileUnitFunction(sc, dwarf_cu, function_die);
}
if (sc.function != NULL)
{
Block& block = sc.function->GetBlock (true);
if (block_die != NULL)
sc.block = block.FindBlockByID (MakeUserID(block_die->GetOffset()));
else if (function_die != NULL)
sc.block = block.FindBlockByID (MakeUserID(function_die->GetOffset()));
}
}
}
sc_list.Append(sc);
line_idx = line_table->FindLineEntryIndexByFileIndex (line_idx + 1, file_idx, found_line, true, &sc.line_entry);
}
}
}
else if (file_spec_matches_cu_file_spec && !check_inlines)
{
// only append the context if we aren't looking for inline call sites
// by file and line and if the file spec matches that of the compile unit
sc_list.Append(sc);
}
}
else if (file_spec_matches_cu_file_spec && !check_inlines)
{
// only append the context if we aren't looking for inline call sites
// by file and line and if the file spec matches that of the compile unit
sc_list.Append(sc);
}
if (!check_inlines)
break;
}
}
}
}
}
return sc_list.GetSize() - prev_size;
}
void
SymbolFileDWARF::Index ()
{
if (m_indexed)
return;
m_indexed = true;
Timer scoped_timer (__PRETTY_FUNCTION__,
"SymbolFileDWARF::Index (%s)",
GetObjectFile()->GetFileSpec().GetFilename().AsCString("<Unknown>"));
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info)
{
uint32_t cu_idx = 0;
const uint32_t num_compile_units = GetNumCompileUnits();
for (cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
{
DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
bool clear_dies = dwarf_cu->ExtractDIEsIfNeeded (false) > 1;
dwarf_cu->Index (cu_idx,
m_function_basename_index,
m_function_fullname_index,
m_function_method_index,
m_function_selector_index,
m_objc_class_selectors_index,
m_global_index,
m_type_index,
m_namespace_index);
// Keep memory down by clearing DIEs if this generate function
// caused them to be parsed
if (clear_dies)
dwarf_cu->ClearDIEs (true);
}
m_function_basename_index.Finalize();
m_function_fullname_index.Finalize();
m_function_method_index.Finalize();
m_function_selector_index.Finalize();
m_objc_class_selectors_index.Finalize();
m_global_index.Finalize();
m_type_index.Finalize();
m_namespace_index.Finalize();
#if defined (ENABLE_DEBUG_PRINTF)
StreamFile s(stdout, false);
s.Printf ("DWARF index for '%s':",
GetObjectFile()->GetFileSpec().GetPath().c_str());
s.Printf("\nFunction basenames:\n"); m_function_basename_index.Dump (&s);
s.Printf("\nFunction fullnames:\n"); m_function_fullname_index.Dump (&s);
s.Printf("\nFunction methods:\n"); m_function_method_index.Dump (&s);
s.Printf("\nFunction selectors:\n"); m_function_selector_index.Dump (&s);
s.Printf("\nObjective C class selectors:\n"); m_objc_class_selectors_index.Dump (&s);
s.Printf("\nGlobals and statics:\n"); m_global_index.Dump (&s);
s.Printf("\nTypes:\n"); m_type_index.Dump (&s);
s.Printf("\nNamepaces:\n"); m_namespace_index.Dump (&s);
#endif
}
}
bool
SymbolFileDWARF::NamespaceDeclMatchesThisSymbolFile (const ClangNamespaceDecl *namespace_decl)
{
if (namespace_decl == NULL)
{
// Invalid namespace decl which means we aren't matching only things
// in this symbol file, so return true to indicate it matches this
// symbol file.
return true;
}
clang::ASTContext *namespace_ast = namespace_decl->GetASTContext();
if (namespace_ast == NULL)
return true; // No AST in the "namespace_decl", return true since it
// could then match any symbol file, including this one
if (namespace_ast == GetClangASTContext().getASTContext())
return true; // The ASTs match, return true
// The namespace AST was valid, and it does not match...
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
GetObjectFile()->GetModule()->LogMessage(log, "Valid namespace does not match symbol file");
return false;
}
bool
SymbolFileDWARF::DIEIsInNamespace (const ClangNamespaceDecl *namespace_decl,
DWARFCompileUnit* cu,
const DWARFDebugInfoEntry* die)
{
// No namespace specified, so the answer is
if (namespace_decl == NULL)
return true;
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
const DWARFDebugInfoEntry *decl_ctx_die = NULL;
clang::DeclContext *die_clang_decl_ctx = GetClangDeclContextContainingDIE (cu, die, &decl_ctx_die);
if (decl_ctx_die)
{
clang::NamespaceDecl *clang_namespace_decl = namespace_decl->GetNamespaceDecl();
if (clang_namespace_decl)
{
if (decl_ctx_die->Tag() != DW_TAG_namespace)
{
if (log)
GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent is not a namespace");
return false;
}
if (clang_namespace_decl == die_clang_decl_ctx)
return true;
else
return false;
}
else
{
// We have a namespace_decl that was not NULL but it contained
// a NULL "clang::NamespaceDecl", so this means the global namespace
// So as long the contained decl context DIE isn't a namespace
// we should be ok.
if (decl_ctx_die->Tag() != DW_TAG_namespace)
return true;
}
}
if (log)
GetObjectFile()->GetModule()->LogMessage(log, "Found a match, but its parent doesn't exist");
return false;
}
uint32_t
SymbolFileDWARF::FindGlobalVariables (const ConstString &name, const lldb_private::ClangNamespaceDecl *namespace_decl, bool append, uint32_t max_matches, VariableList& variables)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables)",
name.GetCString(),
static_cast<const void*>(namespace_decl),
append, max_matches);
if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
return 0;
DWARFDebugInfo* info = DebugInfo();
if (info == NULL)
return 0;
// If we aren't appending the results to this list, then clear the list
if (!append)
variables.Clear();
// Remember how many variables are in the list before we search in case
// we are appending the results to a variable list.
const uint32_t original_size = variables.GetSize();
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_names_ap.get())
{
const char *name_cstr = name.GetCString();
llvm::StringRef basename;
llvm::StringRef context;
if (!CPPLanguageRuntime::ExtractContextAndIdentifier(name_cstr, context, basename))
basename = name_cstr;
m_apple_names_ap->FindByName (basename.data(), die_offsets);
}
}
else
{
// Index the DWARF if we haven't already
if (!m_indexed)
Index ();
m_global_index.Find (name, die_offsets);
}
const size_t num_die_matches = die_offsets.size();
if (num_die_matches)
{
SymbolContext sc;
sc.module_sp = m_obj_file->GetModule();
assert (sc.module_sp);
DWARFDebugInfo* debug_info = DebugInfo();
DWARFCompileUnit* dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
bool done = false;
for (size_t i=0; i<num_die_matches && !done; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
switch (die->Tag())
{
default:
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_try_block:
case DW_TAG_catch_block:
break;
case DW_TAG_variable:
{
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
continue;
ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
if (variables.GetSize() - original_size >= max_matches)
done = true;
}
break;
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, name.GetCString());
}
}
}
}
// Return the number of variable that were appended to the list
const uint32_t num_matches = variables.GetSize() - original_size;
if (log && num_matches > 0)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindGlobalVariables (name=\"%s\", namespace_decl=%p, append=%u, max_matches=%u, variables) => %u",
name.GetCString(),
static_cast<const void*>(namespace_decl),
append, max_matches,
num_matches);
}
return num_matches;
}
uint32_t
SymbolFileDWARF::FindGlobalVariables(const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindGlobalVariables (regex=\"%s\", append=%u, max_matches=%u, variables)",
regex.GetText(), append,
max_matches);
}
DWARFDebugInfo* info = DebugInfo();
if (info == NULL)
return 0;
// If we aren't appending the results to this list, then clear the list
if (!append)
variables.Clear();
// Remember how many variables are in the list before we search in case
// we are appending the results to a variable list.
const uint32_t original_size = variables.GetSize();
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_names_ap.get())
{
DWARFMappedHash::DIEInfoArray hash_data_array;
if (m_apple_names_ap->AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
}
}
else
{
// Index the DWARF if we haven't already
if (!m_indexed)
Index ();
m_global_index.Find (regex, die_offsets);
}
SymbolContext sc;
sc.module_sp = m_obj_file->GetModule();
assert (sc.module_sp);
DWARFCompileUnit* dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
const size_t num_matches = die_offsets.size();
if (num_matches)
{
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
sc.comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
ParseVariables(sc, dwarf_cu, LLDB_INVALID_ADDRESS, die, false, false, &variables);
if (variables.GetSize() - original_size >= max_matches)
break;
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for regex '%s')\n",
die_offset, regex.GetText());
}
}
}
}
// Return the number of variable that were appended to the list
return variables.GetSize() - original_size;
}
bool
SymbolFileDWARF::ResolveFunction (dw_offset_t die_offset,
DWARFCompileUnit *&dwarf_cu,
bool include_inlines,
SymbolContextList& sc_list)
{
const DWARFDebugInfoEntry *die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
return ResolveFunction (dwarf_cu, die, include_inlines, sc_list);
}
bool
SymbolFileDWARF::ResolveFunction (DWARFCompileUnit *cu,
const DWARFDebugInfoEntry *die,
bool include_inlines,
SymbolContextList& sc_list)
{
SymbolContext sc;
if (die == NULL)
return false;
// If we were passed a die that is not a function, just return false...
if (! (die->Tag() == DW_TAG_subprogram || (include_inlines && die->Tag() == DW_TAG_inlined_subroutine)))
return false;
const DWARFDebugInfoEntry* inlined_die = NULL;
if (die->Tag() == DW_TAG_inlined_subroutine)
{
inlined_die = die;
while ((die = die->GetParent()) != NULL)
{
if (die->Tag() == DW_TAG_subprogram)
break;
}
}
assert (die && die->Tag() == DW_TAG_subprogram);
if (GetFunction (cu, die, sc))
{
Address addr;
// Parse all blocks if needed
if (inlined_die)
{
Block &function_block = sc.function->GetBlock (true);
sc.block = function_block.FindBlockByID (MakeUserID(inlined_die->GetOffset()));
if (sc.block == NULL)
sc.block = function_block.FindBlockByID (inlined_die->GetOffset());
if (sc.block == NULL || sc.block->GetStartAddress (addr) == false)
addr.Clear();
}
else
{
sc.block = NULL;
addr = sc.function->GetAddressRange().GetBaseAddress();
}
if (addr.IsValid())
{
sc_list.Append(sc);
return true;
}
}
return false;
}
void
SymbolFileDWARF::FindFunctions (const ConstString &name,
const NameToDIE &name_to_die,
bool include_inlines,
SymbolContextList& sc_list)
{
DIEArray die_offsets;
if (name_to_die.Find (name, die_offsets))
{
ParseFunctions (die_offsets, include_inlines, sc_list);
}
}
void
SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
const NameToDIE &name_to_die,
bool include_inlines,
SymbolContextList& sc_list)
{
DIEArray die_offsets;
if (name_to_die.Find (regex, die_offsets))
{
ParseFunctions (die_offsets, include_inlines, sc_list);
}
}
void
SymbolFileDWARF::FindFunctions (const RegularExpression &regex,
const DWARFMappedHash::MemoryTable &memory_table,
bool include_inlines,
SymbolContextList& sc_list)
{
DIEArray die_offsets;
DWARFMappedHash::DIEInfoArray hash_data_array;
if (memory_table.AppendAllDIEsThatMatchingRegex (regex, hash_data_array))
{
DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
ParseFunctions (die_offsets, include_inlines, sc_list);
}
}
void
SymbolFileDWARF::ParseFunctions (const DIEArray &die_offsets,
bool include_inlines,
SymbolContextList& sc_list)
{
const size_t num_matches = die_offsets.size();
if (num_matches)
{
DWARFCompileUnit* dwarf_cu = NULL;
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
ResolveFunction (die_offset, dwarf_cu, include_inlines, sc_list);
}
}
}
bool
SymbolFileDWARF::FunctionDieMatchesPartialName (const DWARFDebugInfoEntry* die,
const DWARFCompileUnit *dwarf_cu,
uint32_t name_type_mask,
const char *partial_name,
const char *base_name_start,
const char *base_name_end)
{
// If we are looking only for methods, throw away all the ones that are or aren't in C++ classes:
if (name_type_mask == eFunctionNameTypeMethod || name_type_mask == eFunctionNameTypeBase)
{
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIEOffset(die->GetOffset());
if (!containing_decl_ctx)
return false;
bool is_cxx_method = DeclKindIsCXXClass(containing_decl_ctx->getDeclKind());
if (name_type_mask == eFunctionNameTypeMethod)
{
if (is_cxx_method == false)
return false;
}
if (name_type_mask == eFunctionNameTypeBase)
{
if (is_cxx_method == true)
return false;
}
}
// Now we need to check whether the name we got back for this type matches the extra specifications
// that were in the name we're looking up:
if (base_name_start != partial_name || *base_name_end != '\0')
{
// First see if the stuff to the left matches the full name. To do that let's see if
// we can pull out the mips linkage name attribute:
Mangled best_name;
DWARFDebugInfoEntry::Attributes attributes;
DWARFFormValue form_value;
die->GetAttributes(this, dwarf_cu, NULL, attributes);
uint32_t idx = attributes.FindAttributeIndex(DW_AT_MIPS_linkage_name);
if (idx == UINT32_MAX)
idx = attributes.FindAttributeIndex(DW_AT_linkage_name);
if (idx != UINT32_MAX)
{
if (attributes.ExtractFormValueAtIndex(this, idx, form_value))
{
const char *mangled_name = form_value.AsCString(&get_debug_str_data());
if (mangled_name)
best_name.SetValue (ConstString(mangled_name), true);
}
}
if (!best_name)
{
idx = attributes.FindAttributeIndex(DW_AT_name);
if (idx != UINT32_MAX && attributes.ExtractFormValueAtIndex(this, idx, form_value))
{
const char *name = form_value.AsCString(&get_debug_str_data());
best_name.SetValue (ConstString(name), false);
}
}
if (best_name.GetDemangledName())
{
const char *demangled = best_name.GetDemangledName().GetCString();
if (demangled)
{
std::string name_no_parens(partial_name, base_name_end - partial_name);
const char *partial_in_demangled = strstr (demangled, name_no_parens.c_str());
if (partial_in_demangled == NULL)
return false;
else
{
// Sort out the case where our name is something like "Process::Destroy" and the match is
// "SBProcess::Destroy" - that shouldn't be a match. We should really always match on
// namespace boundaries...
if (partial_name[0] == ':' && partial_name[1] == ':')
{
// The partial name was already on a namespace boundary so all matches are good.
return true;
}
else if (partial_in_demangled == demangled)
{
// They both start the same, so this is an good match.
return true;
}
else
{
if (partial_in_demangled - demangled == 1)
{
// Only one character difference, can't be a namespace boundary...
return false;
}
else if (*(partial_in_demangled - 1) == ':' && *(partial_in_demangled - 2) == ':')
{
// We are on a namespace boundary, so this is also good.
return true;
}
else
return false;
}
}
}
}
}
return true;
}
uint32_t
SymbolFileDWARF::FindFunctions (const ConstString &name,
const lldb_private::ClangNamespaceDecl *namespace_decl,
uint32_t name_type_mask,
bool include_inlines,
bool append,
SymbolContextList& sc_list)
{
Timer scoped_timer (__PRETTY_FUNCTION__,
"SymbolFileDWARF::FindFunctions (name = '%s')",
name.AsCString());
// eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup()
assert ((name_type_mask & eFunctionNameTypeAuto) == 0);
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, append=%u, sc_list)",
name.GetCString(),
name_type_mask,
append);
}
// If we aren't appending the results to this list, then clear the list
if (!append)
sc_list.Clear();
if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
return 0;
// If name is empty then we won't find anything.
if (name.IsEmpty())
return 0;
// Remember how many sc_list are in the list before we search in case
// we are appending the results to a variable list.
const char *name_cstr = name.GetCString();
const uint32_t original_size = sc_list.GetSize();
DWARFDebugInfo* info = DebugInfo();
if (info == NULL)
return 0;
DWARFCompileUnit *dwarf_cu = NULL;
std::set<const DWARFDebugInfoEntry *> resolved_dies;
if (m_using_apple_tables)
{
if (m_apple_names_ap.get())
{
DIEArray die_offsets;
uint32_t num_matches = 0;
if (name_type_mask & eFunctionNameTypeFull)
{
// If they asked for the full name, match what they typed. At some point we may
// want to canonicalize this (strip double spaces, etc. For now, we just add all the
// dies that we find by exact match.
num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
for (uint32_t i = 0; i < num_matches; i++)
{
const dw_offset_t die_offset = die_offsets[i];
const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
continue;
if (resolved_dies.find(die) == resolved_dies.end())
{
if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
resolved_dies.insert(die);
}
}
else
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
die_offset, name_cstr);
}
}
}
if (name_type_mask & eFunctionNameTypeSelector)
{
if (namespace_decl && *namespace_decl)
return 0; // no selectors in namespaces
num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
// Now make sure these are actually ObjC methods. In this case we can simply look up the name,
// and if it is an ObjC method name, we're good.
for (uint32_t i = 0; i < num_matches; i++)
{
const dw_offset_t die_offset = die_offsets[i];
const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
const char *die_name = die->GetName(this, dwarf_cu);
if (ObjCLanguageRuntime::IsPossibleObjCMethodName(die_name))
{
if (resolved_dies.find(die) == resolved_dies.end())
{
if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
resolved_dies.insert(die);
}
}
}
else
{
GetObjectFile()->GetModule()->ReportError ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
die_offset, name_cstr);
}
}
die_offsets.clear();
}
if (((name_type_mask & eFunctionNameTypeMethod) && !namespace_decl) || name_type_mask & eFunctionNameTypeBase)
{
// The apple_names table stores just the "base name" of C++ methods in the table. So we have to
// extract the base name, look that up, and if there is any other information in the name we were
// passed in we have to post-filter based on that.
// FIXME: Arrange the logic above so that we don't calculate the base name twice:
num_matches = m_apple_names_ap->FindByName (name_cstr, die_offsets);
for (uint32_t i = 0; i < num_matches; i++)
{
const dw_offset_t die_offset = die_offsets[i];
const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
continue;
// If we get to here, the die is good, and we should add it:
if (resolved_dies.find(die) == resolved_dies.end())
if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
{
bool keep_die = true;
if ((name_type_mask & (eFunctionNameTypeBase|eFunctionNameTypeMethod)) != (eFunctionNameTypeBase|eFunctionNameTypeMethod))
{
// We are looking for either basenames or methods, so we need to
// trim out the ones we won't want by looking at the type
SymbolContext sc;
if (sc_list.GetLastContext(sc))
{
if (sc.block)
{
// We have an inlined function
}
else if (sc.function)
{
Type *type = sc.function->GetType();
if (type)
{
clang::DeclContext* decl_ctx = GetClangDeclContextContainingTypeUID (type->GetID());
if (decl_ctx->isRecord())
{
if (name_type_mask & eFunctionNameTypeBase)
{
sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
keep_die = false;
}
}
else
{
if (name_type_mask & eFunctionNameTypeMethod)
{
sc_list.RemoveContextAtIndex(sc_list.GetSize()-1);
keep_die = false;
}
}
}
else
{
GetObjectFile()->GetModule()->ReportWarning ("function at die offset 0x%8.8x had no function type",
die_offset);
}
}
}
}
if (keep_die)
resolved_dies.insert(die);
}
}
else
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x for '%s')",
die_offset, name_cstr);
}
}
die_offsets.clear();
}
}
}
else
{
// Index the DWARF if we haven't already
if (!m_indexed)
Index ();
if (name_type_mask & eFunctionNameTypeFull)
{
FindFunctions (name, m_function_fullname_index, include_inlines, sc_list);
// FIXME Temporary workaround for global/anonymous namespace
// functions debugging FreeBSD and Linux binaries.
// If we didn't find any functions in the global namespace try
// looking in the basename index but ignore any returned
// functions that have a namespace but keep functions which
// have an anonymous namespace
// TODO: The arch in the object file isn't correct for MSVC
// binaries on windows, we should find a way to make it
// correct and handle those symbols as well.
if (sc_list.GetSize() == 0)
{
ArchSpec arch;
if (!namespace_decl &&
GetObjectFile()->GetArchitecture(arch) &&
(arch.GetTriple().isOSFreeBSD() || arch.GetTriple().isOSLinux() ||
arch.GetMachine() == llvm::Triple::hexagon))
{
SymbolContextList temp_sc_list;
FindFunctions (name, m_function_basename_index, include_inlines, temp_sc_list);
SymbolContext sc;
for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++)
{
if (temp_sc_list.GetContextAtIndex(i, sc))
{
ConstString mangled_name = sc.GetFunctionName(Mangled::ePreferMangled);
ConstString demangled_name = sc.GetFunctionName(Mangled::ePreferDemangled);
// Mangled names on Linux and FreeBSD are of the form:
// _ZN18function_namespace13function_nameEv.
if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
!strncmp(demangled_name.GetCString(), "(anonymous namespace)", 21))
{
sc_list.Append(sc);
}
}
}
}
}
}
DIEArray die_offsets;
DWARFCompileUnit *dwarf_cu = NULL;
if (name_type_mask & eFunctionNameTypeBase)
{
uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
for (uint32_t i = 0; i < num_base; i++)
{
const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
if (die)
{
if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
continue;
// If we get to here, the die is good, and we should add it:
if (resolved_dies.find(die) == resolved_dies.end())
{
if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
resolved_dies.insert(die);
}
}
}
die_offsets.clear();
}
if (name_type_mask & eFunctionNameTypeMethod)
{
if (namespace_decl && *namespace_decl)
return 0; // no methods in namespaces
uint32_t num_base = m_function_method_index.Find(name, die_offsets);
{
for (uint32_t i = 0; i < num_base; i++)
{
const DWARFDebugInfoEntry* die = info->GetDIEPtrWithCompileUnitHint (die_offsets[i], &dwarf_cu);
if (die)
{
// If we get to here, the die is good, and we should add it:
if (resolved_dies.find(die) == resolved_dies.end())
{
if (ResolveFunction (dwarf_cu, die, include_inlines, sc_list))
resolved_dies.insert(die);
}
}
}
}
die_offsets.clear();
}
if ((name_type_mask & eFunctionNameTypeSelector) && (!namespace_decl || !*namespace_decl))
{
FindFunctions (name, m_function_selector_index, include_inlines, sc_list);
}
}
// Return the number of variable that were appended to the list
const uint32_t num_matches = sc_list.GetSize() - original_size;
if (log && num_matches > 0)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindFunctions (name=\"%s\", name_type_mask=0x%x, include_inlines=%d, append=%u, sc_list) => %u",
name.GetCString(),
name_type_mask,
include_inlines,
append,
num_matches);
}
return num_matches;
}
uint32_t
SymbolFileDWARF::FindFunctions(const RegularExpression& regex, bool include_inlines, bool append, SymbolContextList& sc_list)
{
Timer scoped_timer (__PRETTY_FUNCTION__,
"SymbolFileDWARF::FindFunctions (regex = '%s')",
regex.GetText());
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindFunctions (regex=\"%s\", append=%u, sc_list)",
regex.GetText(),
append);
}
// If we aren't appending the results to this list, then clear the list
if (!append)
sc_list.Clear();
// Remember how many sc_list are in the list before we search in case
// we are appending the results to a variable list.
uint32_t original_size = sc_list.GetSize();
if (m_using_apple_tables)
{
if (m_apple_names_ap.get())
FindFunctions (regex, *m_apple_names_ap, include_inlines, sc_list);
}
else
{
// Index the DWARF if we haven't already
if (!m_indexed)
Index ();
FindFunctions (regex, m_function_basename_index, include_inlines, sc_list);
FindFunctions (regex, m_function_fullname_index, include_inlines, sc_list);
}
// Return the number of variable that were appended to the list
return sc_list.GetSize() - original_size;
}
uint32_t
SymbolFileDWARF::FindTypes (const SymbolContext& sc,
const ConstString &name,
const lldb_private::ClangNamespaceDecl *namespace_decl,
bool append,
uint32_t max_matches,
TypeList& types)
{
DWARFDebugInfo* info = DebugInfo();
if (info == NULL)
return 0;
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
{
if (namespace_decl)
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list)",
name.GetCString(),
static_cast<void*>(namespace_decl->GetNamespaceDecl()),
namespace_decl->GetQualifiedName().c_str(),
append, max_matches);
else
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list)",
name.GetCString(), append,
max_matches);
}
// If we aren't appending the results to this list, then clear the list
if (!append)
types.Clear();
if (!NamespaceDeclMatchesThisSymbolFile(namespace_decl))
return 0;
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_types_ap.get())
{
const char *name_cstr = name.GetCString();
m_apple_types_ap->FindByName (name_cstr, die_offsets);
}
}
else
{
if (!m_indexed)
Index ();
m_type_index.Find (name, die_offsets);
}
const size_t num_die_matches = die_offsets.size();
if (num_die_matches)
{
const uint32_t initial_types_size = types.GetSize();
DWARFCompileUnit* dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_die_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
if (namespace_decl && !DIEIsInNamespace (namespace_decl, dwarf_cu, die))
continue;
Type *matching_type = ResolveType (dwarf_cu, die);
if (matching_type)
{
// We found a type pointer, now find the shared pointer form our type list
types.InsertUnique (matching_type->shared_from_this());
if (types.GetSize() >= max_matches)
break;
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, name.GetCString());
}
}
}
const uint32_t num_matches = types.GetSize() - initial_types_size;
if (log && num_matches)
{
if (namespace_decl)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(%p) \"%s\", append=%u, max_matches=%u, type_list) => %u",
name.GetCString(),
static_cast<void*>(namespace_decl->GetNamespaceDecl()),
namespace_decl->GetQualifiedName().c_str(),
append, max_matches,
num_matches);
}
else
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindTypes (sc, name=\"%s\", clang::NamespaceDecl(NULL), append=%u, max_matches=%u, type_list) => %u",
name.GetCString(),
append, max_matches,
num_matches);
}
}
return num_matches;
}
return 0;
}
ClangNamespaceDecl
SymbolFileDWARF::FindNamespace (const SymbolContext& sc,
const ConstString &name,
const lldb_private::ClangNamespaceDecl *parent_namespace_decl)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindNamespace (sc, name=\"%s\")",
name.GetCString());
}
if (!NamespaceDeclMatchesThisSymbolFile(parent_namespace_decl))
return ClangNamespaceDecl();
ClangNamespaceDecl namespace_decl;
DWARFDebugInfo* info = DebugInfo();
if (info)
{
DIEArray die_offsets;
// Index if we already haven't to make sure the compile units
// get indexed and make their global DIE index list
if (m_using_apple_tables)
{
if (m_apple_namespaces_ap.get())
{
const char *name_cstr = name.GetCString();
m_apple_namespaces_ap->FindByName (name_cstr, die_offsets);
}
}
else
{
if (!m_indexed)
Index ();
m_namespace_index.Find (name, die_offsets);
}
DWARFCompileUnit* dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
const size_t num_matches = die_offsets.size();
if (num_matches)
{
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die)
{
if (parent_namespace_decl && !DIEIsInNamespace (parent_namespace_decl, dwarf_cu, die))
continue;
clang::NamespaceDecl *clang_namespace_decl = ResolveNamespaceDIE (dwarf_cu, die);
if (clang_namespace_decl)
{
namespace_decl.SetASTContext (GetClangASTContext().getASTContext());
namespace_decl.SetNamespaceDecl (clang_namespace_decl);
break;
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_namespaces accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, name.GetCString());
}
}
}
}
}
if (log && namespace_decl.GetNamespaceDecl())
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindNamespace (sc, name=\"%s\") => clang::NamespaceDecl(%p) \"%s\"",
name.GetCString(),
static_cast<const void*>(namespace_decl.GetNamespaceDecl()),
namespace_decl.GetQualifiedName().c_str());
}
return namespace_decl;
}
uint32_t
SymbolFileDWARF::FindTypes(std::vector<dw_offset_t> die_offsets, uint32_t max_matches, TypeList& types)
{
// Remember how many sc_list are in the list before we search in case
// we are appending the results to a variable list.
uint32_t original_size = types.GetSize();
const uint32_t num_die_offsets = die_offsets.size();
// Parse all of the types we found from the pubtypes matches
uint32_t i;
uint32_t num_matches = 0;
for (i = 0; i < num_die_offsets; ++i)
{
Type *matching_type = ResolveTypeUID (die_offsets[i]);
if (matching_type)
{
// We found a type pointer, now find the shared pointer form our type list
types.InsertUnique (matching_type->shared_from_this());
++num_matches;
if (num_matches >= max_matches)
break;
}
}
// Return the number of variable that were appended to the list
return types.GetSize() - original_size;
}
size_t
SymbolFileDWARF::ParseChildParameters (const SymbolContext& sc,
clang::DeclContext *containing_decl_ctx,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
bool skip_artificial,
bool &is_static,
bool &is_variadic,
std::vector<ClangASTType>& function_param_types,
std::vector<clang::ParmVarDecl*>& function_param_decls,
unsigned &type_quals) // ,
// ClangASTContext::TemplateParameterInfos &template_param_infos))
{
if (parent_die == NULL)
return 0;
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
size_t arg_idx = 0;
const DWARFDebugInfoEntry *die;
for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
{
dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_formal_parameter:
{
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
if (num_attributes > 0)
{
const char *name = NULL;
Declaration decl;
dw_offset_t param_type_die_offset = DW_INVALID_OFFSET;
bool is_artificial = false;
// one of None, Auto, Register, Extern, Static, PrivateExtern
clang::StorageClass storage = clang::SC_None;
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_type: param_type_die_offset = form_value.Reference(); break;
case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
case DW_AT_location:
// if (form_value.BlockData())
// {
// const DWARFDataExtractor& debug_info_data = debug_info();
// uint32_t block_length = form_value.Unsigned();
// DWARFDataExtractor location(debug_info_data, form_value.BlockData() - debug_info_data.GetDataStart(), block_length);
// }
// else
// {
// }
// break;
case DW_AT_const_value:
case DW_AT_default_value:
case DW_AT_description:
case DW_AT_endianity:
case DW_AT_is_optional:
case DW_AT_segment:
case DW_AT_variable_parameter:
default:
case DW_AT_abstract_origin:
case DW_AT_sibling:
break;
}
}
}
bool skip = false;
if (skip_artificial)
{
if (is_artificial)
{
// In order to determine if a C++ member function is
// "const" we have to look at the const-ness of "this"...
// Ugly, but that
if (arg_idx == 0)
{
if (DeclKindIsCXXClass(containing_decl_ctx->getDeclKind()))
{
// Often times compilers omit the "this" name for the
// specification DIEs, so we can't rely upon the name
// being in the formal parameter DIE...
if (name == NULL || ::strcmp(name, "this")==0)
{
Type *this_type = ResolveTypeUID (param_type_die_offset);
if (this_type)
{
uint32_t encoding_mask = this_type->GetEncodingMask();
if (encoding_mask & Type::eEncodingIsPointerUID)
{
is_static = false;
if (encoding_mask & (1u << Type::eEncodingIsConstUID))
type_quals |= clang::Qualifiers::Const;
if (encoding_mask & (1u << Type::eEncodingIsVolatileUID))
type_quals |= clang::Qualifiers::Volatile;
}
}
}
}
}
skip = true;
}
else
{
// HACK: Objective C formal parameters "self" and "_cmd"
// are not marked as artificial in the DWARF...
CompileUnit *comp_unit = GetCompUnitForDWARFCompUnit(dwarf_cu, UINT32_MAX);
if (comp_unit)
{
switch (comp_unit->GetLanguage())
{
case eLanguageTypeObjC:
case eLanguageTypeObjC_plus_plus:
if (name && name[0] && (strcmp (name, "self") == 0 || strcmp (name, "_cmd") == 0))
skip = true;
break;
default:
break;
}
}
}
}
if (!skip)
{
Type *type = ResolveTypeUID(param_type_die_offset);
if (type)
{
function_param_types.push_back (type->GetClangForwardType());
clang::ParmVarDecl *param_var_decl = GetClangASTContext().CreateParameterDeclaration (name,
type->GetClangForwardType(),
storage);
assert(param_var_decl);
function_param_decls.push_back(param_var_decl);
GetClangASTContext().SetMetadataAsUserID (param_var_decl, MakeUserID(die->GetOffset()));
}
}
}
arg_idx++;
}
break;
case DW_TAG_unspecified_parameters:
is_variadic = true;
break;
case DW_TAG_template_type_parameter:
case DW_TAG_template_value_parameter:
// The one caller of this was never using the template_param_infos,
// and the local variable was taking up a large amount of stack space
// in SymbolFileDWARF::ParseType() so this was removed. If we ever need
// the template params back, we can add them back.
// ParseTemplateDIE (dwarf_cu, die, template_param_infos);
break;
default:
break;
}
}
return arg_idx;
}
size_t
SymbolFileDWARF::ParseChildEnumerators
(
const SymbolContext& sc,
lldb_private::ClangASTType &clang_type,
bool is_signed,
uint32_t enumerator_byte_size,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die
)
{
if (parent_die == NULL)
return 0;
size_t enumerators_added = 0;
const DWARFDebugInfoEntry *die;
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
{
const dw_tag_t tag = die->Tag();
if (tag == DW_TAG_enumerator)
{
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
if (num_child_attributes > 0)
{
const char *name = NULL;
bool got_value = false;
int64_t enum_value = 0;
Declaration decl;
uint32_t i;
for (i=0; i<num_child_attributes; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_const_value:
got_value = true;
if (is_signed)
enum_value = form_value.Signed();
else
enum_value = form_value.Unsigned();
break;
case DW_AT_name:
name = form_value.AsCString(&get_debug_str_data());
break;
case DW_AT_description:
default:
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_sibling:
break;
}
}
}
if (name && name[0] && got_value)
{
clang_type.AddEnumerationValueToEnumerationType (clang_type.GetEnumerationIntegerType(),
decl,
name,
enum_value,
enumerator_byte_size * 8);
++enumerators_added;
}
}
}
}
return enumerators_added;
}
void
SymbolFileDWARF::ParseChildArrayInfo
(
const SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *parent_die,
int64_t& first_index,
std::vector<uint64_t>& element_orders,
uint32_t& byte_stride,
uint32_t& bit_stride
)
{
if (parent_die == NULL)
return;
const DWARFDebugInfoEntry *die;
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (dwarf_cu->GetAddressByteSize(), dwarf_cu->IsDWARF64());
for (die = parent_die->GetFirstChild(); die != NULL; die = die->GetSibling())
{
const dw_tag_t tag = die->Tag();
switch (tag)
{
case DW_TAG_subrange_type:
{
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_child_attributes = die->GetAttributes(this, dwarf_cu, fixed_form_sizes, attributes);
if (num_child_attributes > 0)
{
uint64_t num_elements = 0;
uint64_t lower_bound = 0;
uint64_t upper_bound = 0;
bool upper_bound_valid = false;
uint32_t i;
for (i=0; i<num_child_attributes; ++i)
{
const dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_name:
break;
case DW_AT_count:
num_elements = form_value.Unsigned();
break;
case DW_AT_bit_stride:
bit_stride = form_value.Unsigned();
break;
case DW_AT_byte_stride:
byte_stride = form_value.Unsigned();
break;
case DW_AT_lower_bound:
lower_bound = form_value.Unsigned();
break;
case DW_AT_upper_bound:
upper_bound_valid = true;
upper_bound = form_value.Unsigned();
break;
default:
case DW_AT_abstract_origin:
case DW_AT_accessibility:
case DW_AT_allocated:
case DW_AT_associated:
case DW_AT_data_location:
case DW_AT_declaration:
case DW_AT_description:
case DW_AT_sibling:
case DW_AT_threads_scaled:
case DW_AT_type:
case DW_AT_visibility:
break;
}
}
}
if (num_elements == 0)
{
if (upper_bound_valid && upper_bound >= lower_bound)
num_elements = upper_bound - lower_bound + 1;
}
element_orders.push_back (num_elements);
}
}
break;
}
}
}
TypeSP
SymbolFileDWARF::GetTypeForDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry* die)
{
TypeSP type_sp;
if (die != NULL)
{
assert(dwarf_cu != NULL);
Type *type_ptr = m_die_to_type.lookup (die);
if (type_ptr == NULL)
{
CompileUnit* lldb_cu = GetCompUnitForDWARFCompUnit(dwarf_cu);
assert (lldb_cu);
SymbolContext sc(lldb_cu);
type_sp = ParseType(sc, dwarf_cu, die, NULL);
}
else if (type_ptr != DIE_IS_BEING_PARSED)
{
// Grab the existing type from the master types lists
type_sp = type_ptr->shared_from_this();
}
}
return type_sp;
}
clang::DeclContext *
SymbolFileDWARF::GetClangDeclContextContainingDIEOffset (dw_offset_t die_offset)
{
if (die_offset != DW_INVALID_OFFSET)
{
DWARFCompileUnitSP cu_sp;
const DWARFDebugInfoEntry* die = DebugInfo()->GetDIEPtr(die_offset, &cu_sp);
return GetClangDeclContextContainingDIE (cu_sp.get(), die, NULL);
}
return NULL;
}
clang::DeclContext *
SymbolFileDWARF::GetClangDeclContextForDIEOffset (const SymbolContext &sc, dw_offset_t die_offset)
{
if (die_offset != DW_INVALID_OFFSET)
{
DWARFDebugInfo* debug_info = DebugInfo();
if (debug_info)
{
DWARFCompileUnitSP cu_sp;
const DWARFDebugInfoEntry* die = debug_info->GetDIEPtr(die_offset, &cu_sp);
if (die)
return GetClangDeclContextForDIE (sc, cu_sp.get(), die);
}
}
return NULL;
}
clang::NamespaceDecl *
SymbolFileDWARF::ResolveNamespaceDIE (DWARFCompileUnit *dwarf_cu, const DWARFDebugInfoEntry *die)
{
if (die && die->Tag() == DW_TAG_namespace)
{
// See if we already parsed this namespace DIE and associated it with a
// uniqued namespace declaration
clang::NamespaceDecl *namespace_decl = static_cast<clang::NamespaceDecl *>(m_die_to_decl_ctx[die]);
if (namespace_decl)
return namespace_decl;
else
{
const char *namespace_name = die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL);
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, NULL);
namespace_decl = GetClangASTContext().GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log)
{
if (namespace_name)
{
GetObjectFile()->GetModule()->LogMessage (log,
"ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace with DW_AT_name(\"%s\") => clang::NamespaceDecl *%p (original = %p)",
static_cast<void*>(GetClangASTContext().getASTContext()),
MakeUserID(die->GetOffset()),
namespace_name,
static_cast<void*>(namespace_decl),
static_cast<void*>(namespace_decl->getOriginalNamespace()));
}
else
{
GetObjectFile()->GetModule()->LogMessage (log,
"ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
static_cast<void*>(GetClangASTContext().getASTContext()),
MakeUserID(die->GetOffset()),
static_cast<void*>(namespace_decl),
static_cast<void*>(namespace_decl->getOriginalNamespace()));
}
}
if (namespace_decl)
LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
return namespace_decl;
}
}
return NULL;
}
clang::DeclContext *
SymbolFileDWARF::GetClangDeclContextForDIE (const SymbolContext &sc, DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
{
clang::DeclContext *clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
if (clang_decl_ctx)
return clang_decl_ctx;
// If this DIE has a specification, or an abstract origin, then trace to those.
dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
return GetClangDeclContextForDIEOffset (sc, die_offset);
die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
return GetClangDeclContextForDIEOffset (sc, die_offset);
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log)
GetObjectFile()->GetModule()->LogMessage(log, "SymbolFileDWARF::GetClangDeclContextForDIE (die = 0x%8.8x) %s '%s'", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), die->GetName(this, cu));
// This is the DIE we want. Parse it, then query our map.
bool assert_not_being_parsed = true;
ResolveTypeUID (cu, die, assert_not_being_parsed);
clang_decl_ctx = GetCachedClangDeclContextForDIE (die);
return clang_decl_ctx;
}
clang::DeclContext *
SymbolFileDWARF::GetClangDeclContextContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die, const DWARFDebugInfoEntry **decl_ctx_die_copy)
{
if (m_clang_tu_decl == NULL)
m_clang_tu_decl = GetClangASTContext().getASTContext()->getTranslationUnitDecl();
const DWARFDebugInfoEntry *decl_ctx_die = GetDeclContextDIEContainingDIE (cu, die);
if (decl_ctx_die_copy)
*decl_ctx_die_copy = decl_ctx_die;
if (decl_ctx_die)
{
DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find (decl_ctx_die);
if (pos != m_die_to_decl_ctx.end())
return pos->second;
switch (decl_ctx_die->Tag())
{
case DW_TAG_compile_unit:
return m_clang_tu_decl;
case DW_TAG_namespace:
return ResolveNamespaceDIE (cu, decl_ctx_die);
break;
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
{
Type* type = ResolveType (cu, decl_ctx_die);
if (type)
{
clang::DeclContext *decl_ctx = type->GetClangForwardType().GetDeclContextForType ();
if (decl_ctx)
{
LinkDeclContextToDIE (decl_ctx, decl_ctx_die);
if (decl_ctx)
return decl_ctx;
}
}
}
break;
default:
break;
}
}
return m_clang_tu_decl;
}
const DWARFDebugInfoEntry *
SymbolFileDWARF::GetDeclContextDIEContainingDIE (DWARFCompileUnit *cu, const DWARFDebugInfoEntry *die)
{
if (cu && die)
{
const DWARFDebugInfoEntry * const decl_die = die;
while (die != NULL)
{
// If this is the original DIE that we are searching for a declaration
// for, then don't look in the cache as we don't want our own decl
// context to be our decl context...
if (decl_die != die)
{
switch (die->Tag())
{
case DW_TAG_compile_unit:
case DW_TAG_namespace:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
return die;
default:
break;
}
}
dw_offset_t die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_specification, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
{
DWARFCompileUnit *spec_cu = cu;
const DWARFDebugInfoEntry *spec_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &spec_cu);
const DWARFDebugInfoEntry *spec_die_decl_ctx_die = GetDeclContextDIEContainingDIE (spec_cu, spec_die);
if (spec_die_decl_ctx_die)
return spec_die_decl_ctx_die;
}
die_offset = die->GetAttributeValueAsReference(this, cu, DW_AT_abstract_origin, DW_INVALID_OFFSET);
if (die_offset != DW_INVALID_OFFSET)
{
DWARFCompileUnit *abs_cu = cu;
const DWARFDebugInfoEntry *abs_die = DebugInfo()->GetDIEPtrWithCompileUnitHint (die_offset, &abs_cu);
const DWARFDebugInfoEntry *abs_die_decl_ctx_die = GetDeclContextDIEContainingDIE (abs_cu, abs_die);
if (abs_die_decl_ctx_die)
return abs_die_decl_ctx_die;
}
die = die->GetParent();
}
}
return NULL;
}
Symbol *
SymbolFileDWARF::GetObjCClassSymbol (const ConstString &objc_class_name)
{
Symbol *objc_class_symbol = NULL;
if (m_obj_file)
{
Symtab *symtab = m_obj_file->GetSymtab ();
if (symtab)
{
objc_class_symbol = symtab->FindFirstSymbolWithNameAndType (objc_class_name,
eSymbolTypeObjCClass,
Symtab::eDebugNo,
Symtab::eVisibilityAny);
}
}
return objc_class_symbol;
}
// Some compilers don't emit the DW_AT_APPLE_objc_complete_type attribute. If they don't
// then we can end up looking through all class types for a complete type and never find
// the full definition. We need to know if this attribute is supported, so we determine
// this here and cache th result. We also need to worry about the debug map DWARF file
// if we are doing darwin DWARF in .o file debugging.
bool
SymbolFileDWARF::Supports_DW_AT_APPLE_objc_complete_type (DWARFCompileUnit *cu)
{
if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolCalculate)
{
m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolNo;
if (cu && cu->Supports_DW_AT_APPLE_objc_complete_type())
m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
else
{
DWARFDebugInfo* debug_info = DebugInfo();
const uint32_t num_compile_units = GetNumCompileUnits();
for (uint32_t cu_idx = 0; cu_idx < num_compile_units; ++cu_idx)
{
DWARFCompileUnit* dwarf_cu = debug_info->GetCompileUnitAtIndex(cu_idx);
if (dwarf_cu != cu && dwarf_cu->Supports_DW_AT_APPLE_objc_complete_type())
{
m_supports_DW_AT_APPLE_objc_complete_type = eLazyBoolYes;
break;
}
}
}
if (m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolNo && GetDebugMapSymfile ())
return m_debug_map_symfile->Supports_DW_AT_APPLE_objc_complete_type (this);
}
return m_supports_DW_AT_APPLE_objc_complete_type == eLazyBoolYes;
}
// This function can be used when a DIE is found that is a forward declaration
// DIE and we want to try and find a type that has the complete definition.
TypeSP
SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE (const DWARFDebugInfoEntry *die,
const ConstString &type_name,
bool must_be_implementation)
{
TypeSP type_sp;
if (!type_name || (must_be_implementation && !GetObjCClassSymbol (type_name)))
return type_sp;
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_types_ap.get())
{
const char *name_cstr = type_name.GetCString();
m_apple_types_ap->FindCompleteObjCClassByName (name_cstr, die_offsets, must_be_implementation);
}
}
else
{
if (!m_indexed)
Index ();
m_type_index.Find (type_name, die_offsets);
}
const size_t num_matches = die_offsets.size();
DWARFCompileUnit* type_cu = NULL;
const DWARFDebugInfoEntry* type_die = NULL;
if (num_matches)
{
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
if (type_die)
{
bool try_resolving_type = false;
// Don't try and resolve the DIE we are looking for with the DIE itself!
if (type_die != die)
{
switch (type_die->Tag())
{
case DW_TAG_class_type:
case DW_TAG_structure_type:
try_resolving_type = true;
break;
default:
break;
}
}
if (try_resolving_type)
{
if (must_be_implementation && type_cu->Supports_DW_AT_APPLE_objc_complete_type())
try_resolving_type = type_die->GetAttributeValueAsUnsigned (this, type_cu, DW_AT_APPLE_objc_complete_type, 0);
if (try_resolving_type)
{
Type *resolved_type = ResolveType (type_cu, type_die, false);
if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
{
DEBUG_PRINTF ("resolved 0x%8.8" PRIx64 " from %s to 0x%8.8" PRIx64 " (cu 0x%8.8" PRIx64 ")\n",
MakeUserID(die->GetOffset()),
m_obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"),
MakeUserID(type_die->GetOffset()),
MakeUserID(type_cu->GetOffset()));
if (die)
m_die_to_type[die] = resolved_type;
type_sp = resolved_type->shared_from_this();
break;
}
}
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, type_name.GetCString());
}
}
}
}
return type_sp;
}
//----------------------------------------------------------------------
// This function helps to ensure that the declaration contexts match for
// two different DIEs. Often times debug information will refer to a
// forward declaration of a type (the equivalent of "struct my_struct;".
// There will often be a declaration of that type elsewhere that has the
// full definition. When we go looking for the full type "my_struct", we
// will find one or more matches in the accelerator tables and we will
// then need to make sure the type was in the same declaration context
// as the original DIE. This function can efficiently compare two DIEs
// and will return true when the declaration context matches, and false
// when they don't.
//----------------------------------------------------------------------
bool
SymbolFileDWARF::DIEDeclContextsMatch (DWARFCompileUnit* cu1, const DWARFDebugInfoEntry *die1,
DWARFCompileUnit* cu2, const DWARFDebugInfoEntry *die2)
{
if (die1 == die2)
return true;
#if defined (LLDB_CONFIGURATION_DEBUG)
// You can't and shouldn't call this function with a compile unit from
// two different SymbolFileDWARF instances.
assert (DebugInfo()->ContainsCompileUnit (cu1));
assert (DebugInfo()->ContainsCompileUnit (cu2));
#endif
DWARFDIECollection decl_ctx_1;
DWARFDIECollection decl_ctx_2;
//The declaration DIE stack is a stack of the declaration context
// DIEs all the way back to the compile unit. If a type "T" is
// declared inside a class "B", and class "B" is declared inside
// a class "A" and class "A" is in a namespace "lldb", and the
// namespace is in a compile unit, there will be a stack of DIEs:
//
// [0] DW_TAG_class_type for "B"
// [1] DW_TAG_class_type for "A"
// [2] DW_TAG_namespace for "lldb"
// [3] DW_TAG_compile_unit for the source file.
//
// We grab both contexts and make sure that everything matches
// all the way back to the compiler unit.
// First lets grab the decl contexts for both DIEs
die1->GetDeclContextDIEs (this, cu1, decl_ctx_1);
die2->GetDeclContextDIEs (this, cu2, decl_ctx_2);
// Make sure the context arrays have the same size, otherwise
// we are done
const size_t count1 = decl_ctx_1.Size();
const size_t count2 = decl_ctx_2.Size();
if (count1 != count2)
return false;
// Make sure the DW_TAG values match all the way back up the
// compile unit. If they don't, then we are done.
const DWARFDebugInfoEntry *decl_ctx_die1;
const DWARFDebugInfoEntry *decl_ctx_die2;
size_t i;
for (i=0; i<count1; i++)
{
decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
if (decl_ctx_die1->Tag() != decl_ctx_die2->Tag())
return false;
}
#if defined LLDB_CONFIGURATION_DEBUG
// Make sure the top item in the decl context die array is always
// DW_TAG_compile_unit. If it isn't then something went wrong in
// the DWARFDebugInfoEntry::GetDeclContextDIEs() function...
assert (decl_ctx_1.GetDIEPtrAtIndex (count1 - 1)->Tag() == DW_TAG_compile_unit);
#endif
// Always skip the compile unit when comparing by only iterating up to
// "count - 1". Here we compare the names as we go.
for (i=0; i<count1 - 1; i++)
{
decl_ctx_die1 = decl_ctx_1.GetDIEPtrAtIndex (i);
decl_ctx_die2 = decl_ctx_2.GetDIEPtrAtIndex (i);
const char *name1 = decl_ctx_die1->GetName(this, cu1);
const char *name2 = decl_ctx_die2->GetName(this, cu2);
// If the string was from a DW_FORM_strp, then the pointer will often
// be the same!
if (name1 == name2)
continue;
// Name pointers are not equal, so only compare the strings
// if both are not NULL.
if (name1 && name2)
{
// If the strings don't compare, we are done...
if (strcmp(name1, name2) != 0)
return false;
}
else
{
// One name was NULL while the other wasn't
return false;
}
}
// We made it through all of the checks and the declaration contexts
// are equal.
return true;
}
TypeSP
SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext (const DWARFDeclContext &dwarf_decl_ctx)
{
TypeSP type_sp;
const uint32_t dwarf_decl_ctx_count = dwarf_decl_ctx.GetSize();
if (dwarf_decl_ctx_count > 0)
{
const ConstString type_name(dwarf_decl_ctx[0].name);
const dw_tag_t tag = dwarf_decl_ctx[0].tag;
if (type_name)
{
Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_TYPE_COMPLETION|DWARF_LOG_LOOKUPS));
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s')",
DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
dwarf_decl_ctx.GetQualifiedName());
}
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_types_ap.get())
{
const bool has_tag = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeTag);
const bool has_qualified_name_hash = m_apple_types_ap->GetHeader().header_data.ContainsAtom (DWARFMappedHash::eAtomTypeQualNameHash);
if (has_tag && has_qualified_name_hash)
{
const char *qualified_name = dwarf_decl_ctx.GetQualifiedName();
const uint32_t qualified_name_hash = MappedHash::HashStringUsingDJB (qualified_name);
if (log)
GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTagAndQualifiedNameHash()");
m_apple_types_ap->FindByNameAndTagAndQualifiedNameHash (type_name.GetCString(), tag, qualified_name_hash, die_offsets);
}
else if (has_tag)
{
if (log)
GetObjectFile()->GetModule()->LogMessage (log,"FindByNameAndTag()");
m_apple_types_ap->FindByNameAndTag (type_name.GetCString(), tag, die_offsets);
}
else
{
m_apple_types_ap->FindByName (type_name.GetCString(), die_offsets);
}
}
}
else
{
if (!m_indexed)
Index ();
m_type_index.Find (type_name, die_offsets);
}
const size_t num_matches = die_offsets.size();
DWARFCompileUnit* type_cu = NULL;
const DWARFDebugInfoEntry* type_die = NULL;
if (num_matches)
{
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
type_die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &type_cu);
if (type_die)
{
bool try_resolving_type = false;
// Don't try and resolve the DIE we are looking for with the DIE itself!
const dw_tag_t type_tag = type_die->Tag();
// Make sure the tags match
if (type_tag == tag)
{
// The tags match, lets try resolving this type
try_resolving_type = true;
}
else
{
// The tags don't match, but we need to watch our for a
// forward declaration for a struct and ("struct foo")
// ends up being a class ("class foo { ... };") or
// vice versa.
switch (type_tag)
{
case DW_TAG_class_type:
// We had a "class foo", see if we ended up with a "struct foo { ... };"
try_resolving_type = (tag == DW_TAG_structure_type);
break;
case DW_TAG_structure_type:
// We had a "struct foo", see if we ended up with a "class foo { ... };"
try_resolving_type = (tag == DW_TAG_class_type);
break;
default:
// Tags don't match, don't event try to resolve
// using this type whose name matches....
break;
}
}
if (try_resolving_type)
{
DWARFDeclContext type_dwarf_decl_ctx;
type_die->GetDWARFDeclContext (this, type_cu, type_dwarf_decl_ctx);
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') trying die=0x%8.8x (%s)",
DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
dwarf_decl_ctx.GetQualifiedName(),
type_die->GetOffset(),
type_dwarf_decl_ctx.GetQualifiedName());
}
// Make sure the decl contexts match all the way up
if (dwarf_decl_ctx == type_dwarf_decl_ctx)
{
Type *resolved_type = ResolveType (type_cu, type_die, false);
if (resolved_type && resolved_type != DIE_IS_BEING_PARSED)
{
type_sp = resolved_type->shared_from_this();
break;
}
}
}
else
{
if (log)
{
std::string qualified_name;
type_die->GetQualifiedName(this, type_cu, qualified_name);
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag=%s, qualified-name='%s') ignoring die=0x%8.8x (%s)",
DW_TAG_value_to_name(dwarf_decl_ctx[0].tag),
dwarf_decl_ctx.GetQualifiedName(),
type_die->GetOffset(),
qualified_name.c_str());
}
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_types accelerator table had bad die 0x%8.8x for '%s')\n",
die_offset, type_name.GetCString());
}
}
}
}
}
}
return type_sp;
}
bool
SymbolFileDWARF::CopyUniqueClassMethodTypes (SymbolFileDWARF *src_symfile,
Type *class_type,
DWARFCompileUnit* src_cu,
const DWARFDebugInfoEntry *src_class_die,
DWARFCompileUnit* dst_cu,
const DWARFDebugInfoEntry *dst_class_die,
DWARFDIECollection &failures)
{
if (!class_type || !src_cu || !src_class_die || !dst_cu || !dst_class_die)
return false;
if (src_class_die->Tag() != dst_class_die->Tag())
return false;
// We need to complete the class type so we can get all of the method types
// parsed so we can then unique those types to their equivalent counterparts
// in "dst_cu" and "dst_class_die"
class_type->GetClangFullType();
const DWARFDebugInfoEntry *src_die;
const DWARFDebugInfoEntry *dst_die;
UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die;
UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die;
UniqueCStringMap<const DWARFDebugInfoEntry *> src_name_to_die_artificial;
UniqueCStringMap<const DWARFDebugInfoEntry *> dst_name_to_die_artificial;
for (src_die = src_class_die->GetFirstChild(); src_die != NULL; src_die = src_die->GetSibling())
{
if (src_die->Tag() == DW_TAG_subprogram)
{
// Make sure this is a declaration and not a concrete instance by looking
// for DW_AT_declaration set to 1. Sometimes concrete function instances
// are placed inside the class definitions and shouldn't be included in
// the list of things are are tracking here.
if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_declaration, 0) == 1)
{
const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
if (src_name)
{
ConstString src_const_name(src_name);
if (src_die->GetAttributeValueAsUnsigned(src_symfile, src_cu, DW_AT_artificial, 0))
src_name_to_die_artificial.Append(src_const_name.GetCString(), src_die);
else
src_name_to_die.Append(src_const_name.GetCString(), src_die);
}
}
}
}
for (dst_die = dst_class_die->GetFirstChild(); dst_die != NULL; dst_die = dst_die->GetSibling())
{
if (dst_die->Tag() == DW_TAG_subprogram)
{
// Make sure this is a declaration and not a concrete instance by looking
// for DW_AT_declaration set to 1. Sometimes concrete function instances
// are placed inside the class definitions and shouldn't be included in
// the list of things are are tracking here.
if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_declaration, 0) == 1)
{
const char *dst_name = dst_die->GetMangledName (this, dst_cu);
if (dst_name)
{
ConstString dst_const_name(dst_name);
if (dst_die->GetAttributeValueAsUnsigned(this, dst_cu, DW_AT_artificial, 0))
dst_name_to_die_artificial.Append(dst_const_name.GetCString(), dst_die);
else
dst_name_to_die.Append(dst_const_name.GetCString(), dst_die);
}
}
}
}
const uint32_t src_size = src_name_to_die.GetSize ();
const uint32_t dst_size = dst_name_to_die.GetSize ();
Log *log (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO | DWARF_LOG_TYPE_COMPLETION));
// Is everything kosher so we can go through the members at top speed?
bool fast_path = true;
if (src_size != dst_size)
{
if (src_size != 0 && dst_size != 0)
{
if (log)
log->Printf("warning: trying to unique class DIE 0x%8.8x to 0x%8.8x, but they didn't have the same size (src=%d, dst=%d)",
src_class_die->GetOffset(),
dst_class_die->GetOffset(),
src_size,
dst_size);
}
fast_path = false;
}
uint32_t idx;
if (fast_path)
{
for (idx = 0; idx < src_size; ++idx)
{
src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
if (src_die->Tag() != dst_die->Tag())
{
if (log)
log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) tags didn't match 0x%8.8x (%s)",
src_class_die->GetOffset(),
dst_class_die->GetOffset(),
src_die->GetOffset(),
DW_TAG_value_to_name(src_die->Tag()),
dst_die->GetOffset(),
DW_TAG_value_to_name(src_die->Tag()));
fast_path = false;
}
const char *src_name = src_die->GetMangledName (src_symfile, src_cu);
const char *dst_name = dst_die->GetMangledName (this, dst_cu);
// Make sure the names match
if (src_name == dst_name || (strcmp (src_name, dst_name) == 0))
continue;
if (log)
log->Printf("warning: tried to unique class DIE 0x%8.8x to 0x%8.8x, but 0x%8.8x (%s) names didn't match 0x%8.8x (%s)",
src_class_die->GetOffset(),
dst_class_die->GetOffset(),
src_die->GetOffset(),
src_name,
dst_die->GetOffset(),
dst_name);
fast_path = false;
}
}
// Now do the work of linking the DeclContexts and Types.
if (fast_path)
{
// We can do this quickly. Just run across the tables index-for-index since
// we know each node has matching names and tags.
for (idx = 0; idx < src_size; ++idx)
{
src_die = src_name_to_die.GetValueAtIndexUnchecked (idx);
dst_die = dst_name_to_die.GetValueAtIndexUnchecked (idx);
clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
if (src_decl_ctx)
{
if (log)
log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_decl_ctx),
src_die->GetOffset(), dst_die->GetOffset());
LinkDeclContextToDIE (src_decl_ctx, dst_die);
}
else
{
if (log)
log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found",
src_die->GetOffset(), dst_die->GetOffset());
}
Type *src_child_type = m_die_to_type[src_die];
if (src_child_type)
{
if (log)
log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_child_type),
src_child_type->GetID(),
src_die->GetOffset(), dst_die->GetOffset());
m_die_to_type[dst_die] = src_child_type;
}
else
{
if (log)
log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
}
}
}
else
{
// We must do this slowly. For each member of the destination, look
// up a member in the source with the same name, check its tag, and
// unique them if everything matches up. Report failures.
if (!src_name_to_die.IsEmpty() && !dst_name_to_die.IsEmpty())
{
src_name_to_die.Sort();
for (idx = 0; idx < dst_size; ++idx)
{
const char *dst_name = dst_name_to_die.GetCStringAtIndex(idx);
dst_die = dst_name_to_die.GetValueAtIndexUnchecked(idx);
src_die = src_name_to_die.Find(dst_name, NULL);
if (src_die && (src_die->Tag() == dst_die->Tag()))
{
clang::DeclContext *src_decl_ctx = src_symfile->m_die_to_decl_ctx[src_die];
if (src_decl_ctx)
{
if (log)
log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_decl_ctx),
src_die->GetOffset(),
dst_die->GetOffset());
LinkDeclContextToDIE (src_decl_ctx, dst_die);
}
else
{
if (log)
log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
}
Type *src_child_type = m_die_to_type[src_die];
if (src_child_type)
{
if (log)
log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_child_type),
src_child_type->GetID(),
src_die->GetOffset(),
dst_die->GetOffset());
m_die_to_type[dst_die] = src_child_type;
}
else
{
if (log)
log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
}
}
else
{
if (log)
log->Printf ("warning: couldn't find a match for 0x%8.8x", dst_die->GetOffset());
failures.Append(dst_die);
}
}
}
}
const uint32_t src_size_artificial = src_name_to_die_artificial.GetSize ();
const uint32_t dst_size_artificial = dst_name_to_die_artificial.GetSize ();
UniqueCStringMap<const DWARFDebugInfoEntry *> name_to_die_artificial_not_in_src;
if (src_size_artificial && dst_size_artificial)
{
dst_name_to_die_artificial.Sort();
for (idx = 0; idx < src_size_artificial; ++idx)
{
const char *src_name_artificial = src_name_to_die_artificial.GetCStringAtIndex(idx);
src_die = src_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
dst_die = dst_name_to_die_artificial.Find(src_name_artificial, NULL);
if (dst_die)
{
// Both classes have the artificial types, link them
clang::DeclContext *src_decl_ctx = m_die_to_decl_ctx[src_die];
if (src_decl_ctx)
{
if (log)
log->Printf ("uniquing decl context %p from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_decl_ctx),
src_die->GetOffset(), dst_die->GetOffset());
LinkDeclContextToDIE (src_decl_ctx, dst_die);
}
else
{
if (log)
log->Printf ("warning: tried to unique decl context from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
}
Type *src_child_type = m_die_to_type[src_die];
if (src_child_type)
{
if (log)
log->Printf ("uniquing type %p (uid=0x%" PRIx64 ") from 0x%8.8x for 0x%8.8x",
static_cast<void*>(src_child_type),
src_child_type->GetID(),
src_die->GetOffset(), dst_die->GetOffset());
m_die_to_type[dst_die] = src_child_type;
}
else
{
if (log)
log->Printf ("warning: tried to unique lldb_private::Type from 0x%8.8x for 0x%8.8x, but none was found", src_die->GetOffset(), dst_die->GetOffset());
}
}
}
}
if (dst_size_artificial)
{
for (idx = 0; idx < dst_size_artificial; ++idx)
{
const char *dst_name_artificial = dst_name_to_die_artificial.GetCStringAtIndex(idx);
dst_die = dst_name_to_die_artificial.GetValueAtIndexUnchecked (idx);
if (log)
log->Printf ("warning: need to create artificial method for 0x%8.8x for method '%s'", dst_die->GetOffset(), dst_name_artificial);
failures.Append(dst_die);
}
}
return (failures.Size() != 0);
}
TypeSP
SymbolFileDWARF::ParseType (const SymbolContext& sc, DWARFCompileUnit* dwarf_cu, const DWARFDebugInfoEntry *die, bool *type_is_new_ptr)
{
TypeSP type_sp;
if (type_is_new_ptr)
*type_is_new_ptr = false;
#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
static DIEStack g_die_stack;
DIEStack::ScopedPopper scoped_die_logger(g_die_stack);
#endif
AccessType accessibility = eAccessNone;
if (die != NULL)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log)
{
const DWARFDebugInfoEntry *context_die;
clang::DeclContext *context = GetClangDeclContextContainingDIE (dwarf_cu, die, &context_die);
GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x, decl_ctx = %p (die 0x%8.8x)) %s name = '%s')",
die->GetOffset(),
static_cast<void*>(context),
context_die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, dwarf_cu));
#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
scoped_die_logger.Push (dwarf_cu, die);
g_die_stack.LogDIEs(log, this);
#endif
}
//
// Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
// if (log && dwarf_cu)
// {
// StreamString s;
// die->DumpLocation (this, dwarf_cu, s);
// GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
//
// }
Type *type_ptr = m_die_to_type.lookup (die);
TypeList* type_list = GetTypeList();
if (type_ptr == NULL)
{
ClangASTContext &ast = GetClangASTContext();
if (type_is_new_ptr)
*type_is_new_ptr = true;
const dw_tag_t tag = die->Tag();
bool is_forward_declaration = false;
DWARFDebugInfoEntry::Attributes attributes;
const char *type_name_cstr = NULL;
ConstString type_name_const_str;
Type::ResolveState resolve_state = Type::eResolveStateUnresolved;
uint64_t byte_size = 0;
Declaration decl;
Type::EncodingDataType encoding_data_type = Type::eEncodingIsUID;
ClangASTType clang_type;
DWARFFormValue form_value;
dw_attr_t attr;
switch (tag)
{
case DW_TAG_base_type:
case DW_TAG_pointer_type:
case DW_TAG_reference_type:
case DW_TAG_rvalue_reference_type:
case DW_TAG_typedef:
case DW_TAG_const_type:
case DW_TAG_restrict_type:
case DW_TAG_volatile_type:
case DW_TAG_unspecified_type:
{
// Set a bit that lets us know that we are currently parsing this
m_die_to_type[die] = DIE_IS_BEING_PARSED;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
uint32_t encoding = 0;
lldb::user_id_t encoding_uid = LLDB_INVALID_UID;
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name:
type_name_cstr = form_value.AsCString(&get_debug_str_data());
// Work around a bug in llvm-gcc where they give a name to a reference type which doesn't
// include the "&"...
if (tag == DW_TAG_reference_type)
{
if (strchr (type_name_cstr, '&') == NULL)
type_name_cstr = NULL;
}
if (type_name_cstr)
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
case DW_AT_encoding: encoding = form_value.Unsigned(); break;
case DW_AT_type: encoding_uid = form_value.Reference(); break;
default:
case DW_AT_sibling:
break;
}
}
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr, encoding_uid);
switch (tag)
{
default:
break;
case DW_TAG_unspecified_type:
if (strcmp(type_name_cstr, "nullptr_t") == 0 ||
strcmp(type_name_cstr, "decltype(nullptr)") == 0 )
{
resolve_state = Type::eResolveStateFull;
clang_type = ast.GetBasicType(eBasicTypeNullPtr);
break;
}
// Fall through to base type below in case we can handle the type there...
case DW_TAG_base_type:
resolve_state = Type::eResolveStateFull;
clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (type_name_cstr,
encoding,
byte_size * 8);
break;
case DW_TAG_pointer_type: encoding_data_type = Type::eEncodingIsPointerUID; break;
case DW_TAG_reference_type: encoding_data_type = Type::eEncodingIsLValueReferenceUID; break;
case DW_TAG_rvalue_reference_type: encoding_data_type = Type::eEncodingIsRValueReferenceUID; break;
case DW_TAG_typedef: encoding_data_type = Type::eEncodingIsTypedefUID; break;
case DW_TAG_const_type: encoding_data_type = Type::eEncodingIsConstUID; break;
case DW_TAG_restrict_type: encoding_data_type = Type::eEncodingIsRestrictUID; break;
case DW_TAG_volatile_type: encoding_data_type = Type::eEncodingIsVolatileUID; break;
}
if (!clang_type && (encoding_data_type == Type::eEncodingIsPointerUID || encoding_data_type == Type::eEncodingIsTypedefUID) && sc.comp_unit != NULL)
{
bool translation_unit_is_objc = (sc.comp_unit->GetLanguage() == eLanguageTypeObjC || sc.comp_unit->GetLanguage() == eLanguageTypeObjC_plus_plus);
if (translation_unit_is_objc)
{
if (type_name_cstr != NULL)
{
static ConstString g_objc_type_name_id("id");
static ConstString g_objc_type_name_Class("Class");
static ConstString g_objc_type_name_selector("SEL");
if (type_name_const_str == g_objc_type_name_id)
{
if (log)
GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, dwarf_cu));
clang_type = ast.GetBasicType(eBasicTypeObjCID);
encoding_data_type = Type::eEncodingIsUID;
encoding_uid = LLDB_INVALID_UID;
resolve_state = Type::eResolveStateFull;
}
else if (type_name_const_str == g_objc_type_name_Class)
{
if (log)
GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, dwarf_cu));
clang_type = ast.GetBasicType(eBasicTypeObjCClass);
encoding_data_type = Type::eEncodingIsUID;
encoding_uid = LLDB_INVALID_UID;
resolve_state = Type::eResolveStateFull;
}
else if (type_name_const_str == g_objc_type_name_selector)
{
if (log)
GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, dwarf_cu));
clang_type = ast.GetBasicType(eBasicTypeObjCSel);
encoding_data_type = Type::eEncodingIsUID;
encoding_uid = LLDB_INVALID_UID;
resolve_state = Type::eResolveStateFull;
}
}
else if (encoding_data_type == Type::eEncodingIsPointerUID && encoding_uid != LLDB_INVALID_UID)
{
// Clang sometimes erroneously emits id as objc_object*. In that case we fix up the type to "id".
DWARFDebugInfoEntry* encoding_die = dwarf_cu->GetDIEPtr(encoding_uid);
if (encoding_die && encoding_die->Tag() == DW_TAG_structure_type)
{
if (const char *struct_name = encoding_die->GetAttributeValueAsString(this, dwarf_cu, DW_AT_name, NULL))
{
if (!strcmp(struct_name, "objc_object"))
{
if (log)
GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
die->GetOffset(),
DW_TAG_value_to_name(die->Tag()),
die->GetName(this, dwarf_cu));
clang_type = ast.GetBasicType(eBasicTypeObjCID);
encoding_data_type = Type::eEncodingIsUID;
encoding_uid = LLDB_INVALID_UID;
resolve_state = Type::eResolveStateFull;
}
}
}
}
}
}
type_sp.reset( new Type (MakeUserID(die->GetOffset()),
this,
type_name_const_str,
byte_size,
NULL,
encoding_uid,
encoding_data_type,
&decl,
clang_type,
resolve_state));
m_die_to_type[die] = type_sp.get();
// Type* encoding_type = GetUniquedTypeForDIEOffset(encoding_uid, type_sp, NULL, 0, 0, false);
// if (encoding_type != NULL)
// {
// if (encoding_type != DIE_IS_BEING_PARSED)
// type_sp->SetEncodingType(encoding_type);
// else
// m_indirect_fixups.push_back(type_sp.get());
// }
}
break;
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_class_type:
{
// Set a bit that lets us know that we are currently parsing this
m_die_to_type[die] = DIE_IS_BEING_PARSED;
bool byte_size_valid = false;
LanguageType class_language = eLanguageTypeUnknown;
bool is_complete_objc_class = false;
//bool struct_is_class = false;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file:
if (dwarf_cu->DW_AT_decl_file_attributes_are_invalid())
{
// llvm-gcc outputs invalid DW_AT_decl_file attributes that always
// point to the compile unit file, so we clear this invalid value
// so that we can still unique types efficiently.
decl.SetFile(FileSpec ("<invalid>", false));
}
else
decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned()));
break;
case DW_AT_decl_line:
decl.SetLine(form_value.Unsigned());
break;
case DW_AT_decl_column:
decl.SetColumn(form_value.Unsigned());
break;
case DW_AT_name:
type_name_cstr = form_value.AsCString(&get_debug_str_data());
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_byte_size:
byte_size = form_value.Unsigned();
byte_size_valid = true;
break;
case DW_AT_accessibility:
accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned());
break;
case DW_AT_declaration:
is_forward_declaration = form_value.Boolean();
break;
case DW_AT_APPLE_runtime_class:
class_language = (LanguageType)form_value.Signed();
break;
case DW_AT_APPLE_objc_complete_type:
is_complete_objc_class = form_value.Signed();
break;
case DW_AT_allocated:
case DW_AT_associated:
case DW_AT_data_location:
case DW_AT_description:
case DW_AT_start_scope:
case DW_AT_visibility:
default:
case DW_AT_sibling:
break;
}
}
}
}
// UniqueDWARFASTType is large, so don't create a local variables on the
// stack, put it on the heap. This function is often called recursively
// and clang isn't good and sharing the stack space for variables in different blocks.
std::unique_ptr<UniqueDWARFASTType> unique_ast_entry_ap(new UniqueDWARFASTType());
// Only try and unique the type if it has a name.
if (type_name_const_str &&
GetUniqueDWARFASTTypeMap().Find (type_name_const_str,
this,
dwarf_cu,
die,
decl,
byte_size_valid ? byte_size : -1,
*unique_ast_entry_ap))
{
// We have already parsed this type or from another
// compile unit. GCC loves to use the "one definition
// rule" which can result in multiple definitions
// of the same class over and over in each compile
// unit.
type_sp = unique_ast_entry_ap->m_type_sp;
if (type_sp)
{
m_die_to_type[die] = type_sp.get();
return type_sp;
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
int tag_decl_kind = -1;
AccessType default_accessibility = eAccessNone;
if (tag == DW_TAG_structure_type)
{
tag_decl_kind = clang::TTK_Struct;
default_accessibility = eAccessPublic;
}
else if (tag == DW_TAG_union_type)
{
tag_decl_kind = clang::TTK_Union;
default_accessibility = eAccessPublic;
}
else if (tag == DW_TAG_class_type)
{
tag_decl_kind = clang::TTK_Class;
default_accessibility = eAccessPrivate;
}
if (byte_size_valid && byte_size == 0 && type_name_cstr &&
die->HasChildren() == false &&
sc.comp_unit->GetLanguage() == eLanguageTypeObjC)
{
// Work around an issue with clang at the moment where
// forward declarations for objective C classes are emitted
// as:
// DW_TAG_structure_type [2]
// DW_AT_name( "ForwardObjcClass" )
// DW_AT_byte_size( 0x00 )
// DW_AT_decl_file( "..." )
// DW_AT_decl_line( 1 )
//
// Note that there is no DW_AT_declaration and there are
// no children, and the byte size is zero.
is_forward_declaration = true;
}
if (class_language == eLanguageTypeObjC ||
class_language == eLanguageTypeObjC_plus_plus)
{
if (!is_complete_objc_class && Supports_DW_AT_APPLE_objc_complete_type(dwarf_cu))
{
// We have a valid eSymbolTypeObjCClass class symbol whose
// name matches the current objective C class that we
// are trying to find and this DIE isn't the complete
// definition (we checked is_complete_objc_class above and
// know it is false), so the real definition is in here somewhere
type_sp = FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
if (!type_sp && GetDebugMapSymfile ())
{
// We weren't able to find a full declaration in
// this DWARF, see if we have a declaration anywhere
// else...
type_sp = m_debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
}
if (type_sp)
{
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is an incomplete objc type, complete type is 0x%8.8" PRIx64,
static_cast<void*>(this),
die->GetOffset(),
DW_TAG_value_to_name(tag),
type_name_cstr,
type_sp->GetID());
}
// We found a real definition for this type elsewhere
// so lets use it and cache the fact that we found
// a complete type for this die
m_die_to_type[die] = type_sp.get();
return type_sp;
}
}
}
if (is_forward_declaration)
{
// We have a forward declaration to a type and we need
// to try and find a full declaration. We look in the
// current type index just in case we have a forward
// declaration followed by an actual declarations in the
// DWARF. If this fails, we need to look elsewhere...
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, trying to find complete type",
static_cast<void*>(this),
die->GetOffset(),
DW_TAG_value_to_name(tag),
type_name_cstr);
}
DWARFDeclContext die_decl_ctx;
die->GetDWARFDeclContext(this, dwarf_cu, die_decl_ctx);
//type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
type_sp = FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
if (!type_sp && GetDebugMapSymfile ())
{
// We weren't able to find a full declaration in
// this DWARF, see if we have a declaration anywhere
// else...
type_sp = m_debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
}
if (type_sp)
{
if (log)
{
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF(%p) - 0x%8.8x: %s type \"%s\" is a forward declaration, complete type is 0x%8.8" PRIx64,
static_cast<void*>(this),
die->GetOffset(),
DW_TAG_value_to_name(tag),
type_name_cstr,
type_sp->GetID());
}
// We found a real definition for this type elsewhere
// so lets use it and cache the fact that we found
// a complete type for this die
m_die_to_type[die] = type_sp.get();
return type_sp;
}
}
assert (tag_decl_kind != -1);
bool clang_type_was_created = false;
clang_type.SetClangType(ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
if (!clang_type)
{
const DWARFDebugInfoEntry *decl_ctx_die;
clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
if (accessibility == eAccessNone && decl_ctx)
{
// Check the decl context that contains this class/struct/union.
// If it is a class we must give it an accessibility.
const clang::Decl::Kind containing_decl_kind = decl_ctx->getDeclKind();
if (DeclKindIsCXXClass (containing_decl_kind))
accessibility = default_accessibility;
}
ClangASTMetadata metadata;
metadata.SetUserID(MakeUserID(die->GetOffset()));
metadata.SetIsDynamicCXXType(ClassOrStructIsVirtual (dwarf_cu, die));
if (type_name_cstr && strchr (type_name_cstr, '<'))
{
ClangASTContext::TemplateParameterInfos template_param_infos;
if (ParseTemplateParameterInfos (dwarf_cu, die, template_param_infos))
{
clang::ClassTemplateDecl *class_template_decl = ParseClassTemplateDecl (decl_ctx,
accessibility,
type_name_cstr,
tag_decl_kind,
template_param_infos);
clang::ClassTemplateSpecializationDecl *class_specialization_decl = ast.CreateClassTemplateSpecializationDecl (decl_ctx,
class_template_decl,
tag_decl_kind,
template_param_infos);
clang_type = ast.CreateClassTemplateSpecializationType (class_specialization_decl);
clang_type_was_created = true;
GetClangASTContext().SetMetadata (class_template_decl, metadata);
GetClangASTContext().SetMetadata (class_specialization_decl, metadata);
}
}
if (!clang_type_was_created)
{
clang_type_was_created = true;
clang_type = ast.CreateRecordType (decl_ctx,
accessibility,
type_name_cstr,
tag_decl_kind,
class_language,
&metadata);
}
}
// Store a forward declaration to this class type in case any
// parameters in any class methods need it for the clang
// types for function prototypes.
LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
type_sp.reset (new Type (MakeUserID(die->GetOffset()),
this,
type_name_const_str,
byte_size,
NULL,
LLDB_INVALID_UID,
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateForward));
type_sp->SetIsCompleteObjCClass(is_complete_objc_class);
// Add our type to the unique type map so we don't
// end up creating many copies of the same type over
// and over in the ASTContext for our module
unique_ast_entry_ap->m_type_sp = type_sp;
unique_ast_entry_ap->m_symfile = this;
unique_ast_entry_ap->m_cu = dwarf_cu;
unique_ast_entry_ap->m_die = die;
unique_ast_entry_ap->m_declaration = decl;
unique_ast_entry_ap->m_byte_size = byte_size;
GetUniqueDWARFASTTypeMap().Insert (type_name_const_str,
*unique_ast_entry_ap);
if (is_forward_declaration && die->HasChildren())
{
// Check to see if the DIE actually has a definition, some version of GCC will
// emit DIEs with DW_AT_declaration set to true, but yet still have subprogram,
// members, or inheritance, so we can't trust it
const DWARFDebugInfoEntry *child_die = die->GetFirstChild();
while (child_die)
{
switch (child_die->Tag())
{
case DW_TAG_inheritance:
case DW_TAG_subprogram:
case DW_TAG_member:
case DW_TAG_APPLE_property:
case DW_TAG_class_type:
case DW_TAG_structure_type:
case DW_TAG_enumeration_type:
case DW_TAG_typedef:
case DW_TAG_union_type:
child_die = NULL;
is_forward_declaration = false;
break;
default:
child_die = child_die->GetSibling();
break;
}
}
}
if (!is_forward_declaration)
{
// Always start the definition for a class type so that
// if the class has child classes or types that require
// the class to be created for use as their decl contexts
// the class will be ready to accept these child definitions.
if (die->HasChildren() == false)
{
// No children for this struct/union/class, lets finish it
clang_type.StartTagDeclarationDefinition ();
clang_type.CompleteTagDeclarationDefinition ();
if (tag == DW_TAG_structure_type) // this only applies in C
{
clang::RecordDecl *record_decl = clang_type.GetAsRecordDecl();
if (record_decl)
m_record_decl_to_layout_map.insert(std::make_pair(record_decl, LayoutInfo()));
}
}
else if (clang_type_was_created)
{
// Start the definition if the class is not objective C since
// the underlying decls respond to isCompleteDefinition(). Objective
// C decls don't respond to isCompleteDefinition() so we can't
// start the declaration definition right away. For C++ class/union/structs
// we want to start the definition in case the class is needed as the
// declaration context for a contained class or type without the need
// to complete that type..
if (class_language != eLanguageTypeObjC &&
class_language != eLanguageTypeObjC_plus_plus)
clang_type.StartTagDeclarationDefinition ();
// Leave this as a forward declaration until we need
// to know the details of the type. lldb_private::Type
// will automatically call the SymbolFile virtual function
// "SymbolFileDWARF::ResolveClangOpaqueTypeDefinition(Type *)"
// When the definition needs to be defined.
m_forward_decl_die_to_clang_type[die] = clang_type.GetOpaqueQualType();
m_forward_decl_clang_type_to_die[clang_type.RemoveFastQualifiers().GetOpaqueQualType()] = die;
clang_type.SetHasExternalStorage (true);
}
}
}
break;
case DW_TAG_enumeration_type:
{
// Set a bit that lets us know that we are currently parsing this
m_die_to_type[die] = DIE_IS_BEING_PARSED;
lldb::user_id_t encoding_uid = DW_INVALID_OFFSET;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name:
type_name_cstr = form_value.AsCString(&get_debug_str_data());
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_type: encoding_uid = form_value.Reference(); break;
case DW_AT_byte_size: byte_size = form_value.Unsigned(); break;
case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
case DW_AT_declaration: break; //is_forward_declaration = form_value.Boolean(); break;
case DW_AT_allocated:
case DW_AT_associated:
case DW_AT_bit_stride:
case DW_AT_byte_stride:
case DW_AT_data_location:
case DW_AT_description:
case DW_AT_start_scope:
case DW_AT_visibility:
case DW_AT_specification:
case DW_AT_abstract_origin:
case DW_AT_sibling:
break;
}
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
ClangASTType enumerator_clang_type;
clang_type.SetClangType (ast.getASTContext(), m_forward_decl_die_to_clang_type.lookup (die));
if (!clang_type)
{
if (encoding_uid != DW_INVALID_OFFSET)
{
Type *enumerator_type = ResolveTypeUID(encoding_uid);
if (enumerator_type)
enumerator_clang_type = enumerator_type->GetClangFullType();
}
if (!enumerator_clang_type)
enumerator_clang_type = ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
DW_ATE_signed,
byte_size * 8);
clang_type = ast.CreateEnumerationType (type_name_cstr,
GetClangDeclContextContainingDIE (dwarf_cu, die, NULL),
decl,
enumerator_clang_type);
}
else
{
enumerator_clang_type = clang_type.GetEnumerationIntegerType ();
}
LinkDeclContextToDIE(clang_type.GetDeclContextForType(), die);
type_sp.reset( new Type (MakeUserID(die->GetOffset()),
this,
type_name_const_str,
byte_size,
NULL,
encoding_uid,
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateForward));
clang_type.StartTagDeclarationDefinition ();
if (die->HasChildren())
{
SymbolContext cu_sc(GetCompUnitForDWARFCompUnit(dwarf_cu));
bool is_signed = false;
enumerator_clang_type.IsIntegerType(is_signed);
ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), dwarf_cu, die);
}
clang_type.CompleteTagDeclarationDefinition ();
}
}
break;
case DW_TAG_inlined_subroutine:
case DW_TAG_subprogram:
case DW_TAG_subroutine_type:
{
// Set a bit that lets us know that we are currently parsing this
m_die_to_type[die] = DIE_IS_BEING_PARSED;
//const char *mangled = NULL;
dw_offset_t type_die_offset = DW_INVALID_OFFSET;
bool is_variadic = false;
bool is_inline = false;
bool is_static = false;
bool is_virtual = false;
bool is_explicit = false;
bool is_artificial = false;
dw_offset_t specification_die_offset = DW_INVALID_OFFSET;
dw_offset_t abstract_origin_die_offset = DW_INVALID_OFFSET;
dw_offset_t object_pointer_die_offset = DW_INVALID_OFFSET;
unsigned type_quals = 0;
clang::StorageClass storage = clang::SC_None;//, Extern, Static, PrivateExtern
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name:
type_name_cstr = form_value.AsCString(&get_debug_str_data());
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_linkage_name:
case DW_AT_MIPS_linkage_name: break; // mangled = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_type: type_die_offset = form_value.Reference(); break;
case DW_AT_accessibility: accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break;
case DW_AT_inline: is_inline = form_value.Boolean(); break;
case DW_AT_virtuality: is_virtual = form_value.Boolean(); break;
case DW_AT_explicit: is_explicit = form_value.Boolean(); break;
case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
case DW_AT_external:
if (form_value.Unsigned())
{
if (storage == clang::SC_None)
storage = clang::SC_Extern;
else
storage = clang::SC_PrivateExtern;
}
break;
case DW_AT_specification:
specification_die_offset = form_value.Reference();
break;
case DW_AT_abstract_origin:
abstract_origin_die_offset = form_value.Reference();
break;
case DW_AT_object_pointer:
object_pointer_die_offset = form_value.Reference();
break;
case DW_AT_allocated:
case DW_AT_associated:
case DW_AT_address_class:
case DW_AT_calling_convention:
case DW_AT_data_location:
case DW_AT_elemental:
case DW_AT_entry_pc:
case DW_AT_frame_base:
case DW_AT_high_pc:
case DW_AT_low_pc:
case DW_AT_prototyped:
case DW_AT_pure:
case DW_AT_ranges:
case DW_AT_recursive:
case DW_AT_return_addr:
case DW_AT_segment:
case DW_AT_start_scope:
case DW_AT_static_link:
case DW_AT_trampoline:
case DW_AT_visibility:
case DW_AT_vtable_elem_location:
case DW_AT_description:
case DW_AT_sibling:
break;
}
}
}
}
std::string object_pointer_name;
if (object_pointer_die_offset != DW_INVALID_OFFSET)
{
// Get the name from the object pointer die
StreamString s;
if (DWARFDebugInfoEntry::GetName (this, dwarf_cu, object_pointer_die_offset, s))
{
object_pointer_name.assign(s.GetData());
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
ClangASTType return_clang_type;
Type *func_type = NULL;
if (type_die_offset != DW_INVALID_OFFSET)
func_type = ResolveTypeUID(type_die_offset);
if (func_type)
return_clang_type = func_type->GetClangForwardType();
else
return_clang_type = ast.GetBasicType(eBasicTypeVoid);
std::vector<ClangASTType> function_param_types;
std::vector<clang::ParmVarDecl*> function_param_decls;
// Parse the function children for the parameters
const DWARFDebugInfoEntry *decl_ctx_die = NULL;
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (dwarf_cu, die, &decl_ctx_die);
const clang::Decl::Kind containing_decl_kind = containing_decl_ctx->getDeclKind();
const bool is_cxx_method = DeclKindIsCXXClass (containing_decl_kind);
// Start off static. This will be set to false in ParseChildParameters(...)
// if we find a "this" parameters as the first parameter
if (is_cxx_method)
is_static = true;
if (die->HasChildren())
{
bool skip_artificial = true;
ParseChildParameters (sc,
containing_decl_ctx,
dwarf_cu,
die,
skip_artificial,
is_static,
is_variadic,
function_param_types,
function_param_decls,
type_quals);
}
// clang_type will get the function prototype clang type after this call
clang_type = ast.CreateFunctionType (return_clang_type,
function_param_types.data(),
function_param_types.size(),
is_variadic,
type_quals);
bool ignore_containing_context = false;
if (type_name_cstr)
{
bool type_handled = false;
if (tag == DW_TAG_subprogram)
{
ObjCLanguageRuntime::MethodName objc_method (type_name_cstr, true);
if (objc_method.IsValid(true))
{
ClangASTType class_opaque_type;
ConstString class_name(objc_method.GetClassName());
if (class_name)
{
TypeSP complete_objc_class_type_sp (FindCompleteObjCDefinitionTypeForDIE (NULL, class_name, false));
if (complete_objc_class_type_sp)
{
ClangASTType type_clang_forward_type = complete_objc_class_type_sp->GetClangForwardType();
if (type_clang_forward_type.IsObjCObjectOrInterfaceType ())
class_opaque_type = type_clang_forward_type;
}
}
if (class_opaque_type)
{
// If accessibility isn't set to anything valid, assume public for
// now...
if (accessibility == eAccessNone)
accessibility = eAccessPublic;
clang::ObjCMethodDecl *objc_method_decl = class_opaque_type.AddMethodToObjCObjectType (type_name_cstr,
clang_type,
accessibility,
is_artificial);
type_handled = objc_method_decl != NULL;
if (type_handled)
{
LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
GetClangASTContext().SetMetadataAsUserID (objc_method_decl, MakeUserID(die->GetOffset()));
}
else
{
GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid Objective-C method 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
die->GetOffset(),
tag,
DW_TAG_value_to_name(tag));
}
}
}
else if (is_cxx_method)
{
// Look at the parent of this DIE and see if is is
// a class or struct and see if this is actually a
// C++ method
Type *class_type = ResolveType (dwarf_cu, decl_ctx_die);
if (class_type)
{
if (class_type->GetID() != MakeUserID(decl_ctx_die->GetOffset()))
{
// We uniqued the parent class of this function to another class
// so we now need to associate all dies under "decl_ctx_die" to
// DIEs in the DIE for "class_type"...
SymbolFileDWARF *class_symfile = NULL;
DWARFCompileUnitSP class_type_cu_sp;
const DWARFDebugInfoEntry *class_type_die = NULL;
SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile();
if (debug_map_symfile)
{
class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
class_type_die = class_symfile->DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
}
else
{
class_symfile = this;
class_type_die = DebugInfo()->GetDIEPtr(class_type->GetID(), &class_type_cu_sp);
}
if (class_type_die)
{
DWARFDIECollection failures;
CopyUniqueClassMethodTypes (class_symfile,
class_type,
class_type_cu_sp.get(),
class_type_die,
dwarf_cu,
decl_ctx_die,
failures);
// FIXME do something with these failures that's smarter than
// just dropping them on the ground. Unfortunately classes don't
// like having stuff added to them after their definitions are
// complete...
type_ptr = m_die_to_type[die];
if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
{
type_sp = type_ptr->shared_from_this();
break;
}
}
}
if (specification_die_offset != DW_INVALID_OFFSET)
{
// We have a specification which we are going to base our function
// prototype off of, so we need this type to be completed so that the
// m_die_to_decl_ctx for the method in the specification has a valid
// clang decl context.
class_type->GetClangForwardType();
// If we have a specification, then the function type should have been
// made with the specification and not with this die.
DWARFCompileUnitSP spec_cu_sp;
const DWARFDebugInfoEntry* spec_die = DebugInfo()->GetDIEPtr(specification_die_offset, &spec_cu_sp);
clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, spec_die);
if (spec_clang_decl_ctx)
{
LinkDeclContextToDIE(spec_clang_decl_ctx, die);
}
else
{
GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8x) has no decl\n",
MakeUserID(die->GetOffset()),
specification_die_offset);
}
type_handled = true;
}
else if (abstract_origin_die_offset != DW_INVALID_OFFSET)
{
// We have a specification which we are going to base our function
// prototype off of, so we need this type to be completed so that the
// m_die_to_decl_ctx for the method in the abstract origin has a valid
// clang decl context.
class_type->GetClangForwardType();
DWARFCompileUnitSP abs_cu_sp;
const DWARFDebugInfoEntry* abs_die = DebugInfo()->GetDIEPtr(abstract_origin_die_offset, &abs_cu_sp);
clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (sc, dwarf_cu, abs_die);
if (abs_clang_decl_ctx)
{
LinkDeclContextToDIE (abs_clang_decl_ctx, die);
}
else
{
GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8x) has no decl\n",
MakeUserID(die->GetOffset()),
abstract_origin_die_offset);
}
type_handled = true;
}
else
{
ClangASTType class_opaque_type = class_type->GetClangForwardType();
if (class_opaque_type.IsCXXClassType ())
{
if (class_opaque_type.IsBeingDefined ())
{
// Neither GCC 4.2 nor clang++ currently set a valid accessibility
// in the DWARF for C++ methods... Default to public for now...
if (accessibility == eAccessNone)
accessibility = eAccessPublic;
if (!is_static && !die->HasChildren())
{
// We have a C++ member function with no children (this pointer!)
// and clang will get mad if we try and make a function that isn't
// well formed in the DWARF, so we will just skip it...
type_handled = true;
}
else
{
clang::CXXMethodDecl *cxx_method_decl;
// REMOVE THE CRASH DESCRIPTION BELOW
Host::SetCrashDescriptionWithFormat ("SymbolFileDWARF::ParseType() is adding a method %s to class %s in DIE 0x%8.8" PRIx64 " from %s",
type_name_cstr,
class_type->GetName().GetCString(),
MakeUserID(die->GetOffset()),
m_obj_file->GetFileSpec().GetPath().c_str());
const bool is_attr_used = false;
cxx_method_decl = class_opaque_type.AddMethodToCXXRecordType (type_name_cstr,
clang_type,
accessibility,
is_virtual,
is_static,
is_inline,
is_explicit,
is_attr_used,
is_artificial);
type_handled = cxx_method_decl != NULL;
if (type_handled)
{
LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(cxx_method_decl), die);
Host::SetCrashDescription (NULL);
ClangASTMetadata metadata;
metadata.SetUserID(MakeUserID(die->GetOffset()));
if (!object_pointer_name.empty())
{
metadata.SetObjectPtrName(object_pointer_name.c_str());
if (log)
log->Printf ("Setting object pointer name: %s on method object %p.\n",
object_pointer_name.c_str(),
static_cast<void*>(cxx_method_decl));
}
GetClangASTContext().SetMetadata (cxx_method_decl, metadata);
}
else
{
ignore_containing_context = true;
}
}
}
else
{
// We were asked to parse the type for a method in a class, yet the
// class hasn't been asked to complete itself through the
// clang::ExternalASTSource protocol, so we need to just have the
// class complete itself and do things the right way, then our
// DIE should then have an entry in the m_die_to_type map. First
// we need to modify the m_die_to_type so it doesn't think we are
// trying to parse this DIE anymore...
m_die_to_type[die] = NULL;
// Now we get the full type to force our class type to complete itself
// using the clang::ExternalASTSource protocol which will parse all
// base classes and all methods (including the method for this DIE).
class_type->GetClangFullType();
// The type for this DIE should have been filled in the function call above
type_ptr = m_die_to_type[die];
if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
{
type_sp = type_ptr->shared_from_this();
break;
}
// FIXME This is fixing some even uglier behavior but we really need to
// uniq the methods of each class as well as the class itself.
// <rdar://problem/11240464>
type_handled = true;
}
}
}
}
}
}
if (!type_handled)
{
// We just have a function that isn't part of a class
clang::FunctionDecl *function_decl = ast.CreateFunctionDeclaration (ignore_containing_context ? GetClangASTContext().GetTranslationUnitDecl() : containing_decl_ctx,
type_name_cstr,
clang_type,
storage,
is_inline);
// if (template_param_infos.GetSize() > 0)
// {
// clang::FunctionTemplateDecl *func_template_decl = ast.CreateFunctionTemplateDecl (containing_decl_ctx,
// function_decl,
// type_name_cstr,
// template_param_infos);
//
// ast.CreateFunctionTemplateSpecializationInfo (function_decl,
// func_template_decl,
// template_param_infos);
// }
// Add the decl to our DIE to decl context map
assert (function_decl);
LinkDeclContextToDIE(function_decl, die);
if (!function_param_decls.empty())
ast.SetFunctionParameters (function_decl,
&function_param_decls.front(),
function_param_decls.size());
ClangASTMetadata metadata;
metadata.SetUserID(MakeUserID(die->GetOffset()));
if (!object_pointer_name.empty())
{
metadata.SetObjectPtrName(object_pointer_name.c_str());
if (log)
log->Printf ("Setting object pointer name: %s on function object %p.",
object_pointer_name.c_str(),
static_cast<void*>(function_decl));
}
GetClangASTContext().SetMetadata (function_decl, metadata);
}
}
type_sp.reset( new Type (MakeUserID(die->GetOffset()),
this,
type_name_const_str,
0,
NULL,
LLDB_INVALID_UID,
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateFull));
assert(type_sp.get());
}
break;
case DW_TAG_array_type:
{
// Set a bit that lets us know that we are currently parsing this
m_die_to_type[die] = DIE_IS_BEING_PARSED;
lldb::user_id_t type_die_offset = DW_INVALID_OFFSET;
int64_t first_index = 0;
uint32_t byte_stride = 0;
uint32_t bit_stride = 0;
bool is_vector = false;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name:
type_name_cstr = form_value.AsCString(&get_debug_str_data());
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_type: type_die_offset = form_value.Reference(); break;
case DW_AT_byte_size: break; // byte_size = form_value.Unsigned(); break;
case DW_AT_byte_stride: byte_stride = form_value.Unsigned(); break;
case DW_AT_bit_stride: bit_stride = form_value.Unsigned(); break;
case DW_AT_GNU_vector: is_vector = form_value.Boolean(); break;
case DW_AT_accessibility: break; // accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
case DW_AT_declaration: break; // is_forward_declaration = form_value.Boolean(); break;
case DW_AT_allocated:
case DW_AT_associated:
case DW_AT_data_location:
case DW_AT_description:
case DW_AT_ordering:
case DW_AT_start_scope:
case DW_AT_visibility:
case DW_AT_specification:
case DW_AT_abstract_origin:
case DW_AT_sibling:
break;
}
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", MakeUserID(die->GetOffset()), DW_TAG_value_to_name(tag), type_name_cstr);
Type *element_type = ResolveTypeUID(type_die_offset);
if (element_type)
{
std::vector<uint64_t> element_orders;
ParseChildArrayInfo(sc, dwarf_cu, die, first_index, element_orders, byte_stride, bit_stride);
if (byte_stride == 0 && bit_stride == 0)
byte_stride = element_type->GetByteSize();
ClangASTType array_element_type = element_type->GetClangForwardType();
uint64_t array_element_bit_stride = byte_stride * 8 + bit_stride;
if (element_orders.size() > 0)
{
uint64_t num_elements = 0;
std::vector<uint64_t>::const_reverse_iterator pos;
std::vector<uint64_t>::const_reverse_iterator end = element_orders.rend();
for (pos = element_orders.rbegin(); pos != end; ++pos)
{
num_elements = *pos;
clang_type = ast.CreateArrayType (array_element_type,
num_elements,
is_vector);
array_element_type = clang_type;
array_element_bit_stride = num_elements ?
array_element_bit_stride * num_elements :
array_element_bit_stride;
}
}
else
{
clang_type = ast.CreateArrayType (array_element_type, 0, is_vector);
}
ConstString empty_name;
type_sp.reset( new Type (MakeUserID(die->GetOffset()),
this,
empty_name,
array_element_bit_stride / 8,
NULL,
type_die_offset,
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateFull));
type_sp->SetEncodingType (element_type);
}
}
}
break;
case DW_TAG_ptr_to_member_type:
{
dw_offset_t type_die_offset = DW_INVALID_OFFSET;
dw_offset_t containing_type_die_offset = DW_INVALID_OFFSET;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0) {
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_type:
type_die_offset = form_value.Reference(); break;
case DW_AT_containing_type:
containing_type_die_offset = form_value.Reference(); break;
}
}
}
Type *pointee_type = ResolveTypeUID(type_die_offset);
Type *class_type = ResolveTypeUID(containing_type_die_offset);
ClangASTType pointee_clang_type = pointee_type->GetClangForwardType();
ClangASTType class_clang_type = class_type->GetClangLayoutType();
clang_type = pointee_clang_type.CreateMemberPointerType(class_clang_type);
byte_size = clang_type.GetByteSize(nullptr);
type_sp.reset( new Type (MakeUserID(die->GetOffset()),
this,
type_name_const_str,
byte_size,
NULL,
LLDB_INVALID_UID,
Type::eEncodingIsUID,
NULL,
clang_type,
Type::eResolveStateForward));
}
break;
}
default:
GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: unhandled type tag 0x%4.4x (%s), please file a bug and attach the file at the start of this error message",
die->GetOffset(),
tag,
DW_TAG_value_to_name(tag));
break;
}
if (type_sp.get())
{
const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
dw_tag_t sc_parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
SymbolContextScope * symbol_context_scope = NULL;
if (sc_parent_tag == DW_TAG_compile_unit)
{
symbol_context_scope = sc.comp_unit;
}
else if (sc.function != NULL && sc_parent_die)
{
symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
if (symbol_context_scope == NULL)
symbol_context_scope = sc.function;
}
if (symbol_context_scope != NULL)
{
type_sp->SetSymbolContextScope(symbol_context_scope);
}
// We are ready to put this type into the uniqued list up at the module level
type_list->Insert (type_sp);
m_die_to_type[die] = type_sp.get();
}
}
else if (type_ptr != DIE_IS_BEING_PARSED)
{
type_sp = type_ptr->shared_from_this();
}
}
return type_sp;
}
size_t
SymbolFileDWARF::ParseTypes
(
const SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
bool parse_siblings,
bool parse_children
)
{
size_t types_added = 0;
while (die != NULL)
{
bool type_is_new = false;
if (ParseType(sc, dwarf_cu, die, &type_is_new).get())
{
if (type_is_new)
++types_added;
}
if (parse_children && die->HasChildren())
{
if (die->Tag() == DW_TAG_subprogram)
{
SymbolContext child_sc(sc);
child_sc.function = sc.comp_unit->FindFunctionByUID(MakeUserID(die->GetOffset())).get();
types_added += ParseTypes(child_sc, dwarf_cu, die->GetFirstChild(), true, true);
}
else
types_added += ParseTypes(sc, dwarf_cu, die->GetFirstChild(), true, true);
}
if (parse_siblings)
die = die->GetSibling();
else
die = NULL;
}
return types_added;
}
size_t
SymbolFileDWARF::ParseFunctionBlocks (const SymbolContext &sc)
{
assert(sc.comp_unit && sc.function);
size_t functions_added = 0;
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
dw_offset_t function_die_offset = sc.function->GetID();
const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(function_die_offset);
if (function_die)
{
ParseFunctionBlocks(sc, &sc.function->GetBlock (false), dwarf_cu, function_die, LLDB_INVALID_ADDRESS, 0);
}
}
return functions_added;
}
size_t
SymbolFileDWARF::ParseTypes (const SymbolContext &sc)
{
// At least a compile unit must be valid
assert(sc.comp_unit);
size_t types_added = 0;
DWARFCompileUnit* dwarf_cu = GetDWARFCompileUnit(sc.comp_unit);
if (dwarf_cu)
{
if (sc.function)
{
dw_offset_t function_die_offset = sc.function->GetID();
const DWARFDebugInfoEntry *func_die = dwarf_cu->GetDIEPtr(function_die_offset);
if (func_die && func_die->HasChildren())
{
types_added = ParseTypes(sc, dwarf_cu, func_die->GetFirstChild(), true, true);
}
}
else
{
const DWARFDebugInfoEntry *dwarf_cu_die = dwarf_cu->DIE();
if (dwarf_cu_die && dwarf_cu_die->HasChildren())
{
types_added = ParseTypes(sc, dwarf_cu, dwarf_cu_die->GetFirstChild(), true, true);
}
}
}
return types_added;
}
size_t
SymbolFileDWARF::ParseVariablesForContext (const SymbolContext& sc)
{
if (sc.comp_unit != NULL)
{
DWARFDebugInfo* info = DebugInfo();
if (info == NULL)
return 0;
if (sc.function)
{
DWARFCompileUnit* dwarf_cu = info->GetCompileUnitContainingDIE(sc.function->GetID()).get();
if (dwarf_cu == NULL)
return 0;
const DWARFDebugInfoEntry *function_die = dwarf_cu->GetDIEPtr(sc.function->GetID());
dw_addr_t func_lo_pc = function_die->GetAttributeValueAsUnsigned (this, dwarf_cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
if (func_lo_pc != LLDB_INVALID_ADDRESS)
{
const size_t num_variables = ParseVariables(sc, dwarf_cu, func_lo_pc, function_die->GetFirstChild(), true, true);
// Let all blocks know they have parse all their variables
sc.function->GetBlock (false).SetDidParseVariables (true, true);
return num_variables;
}
}
else if (sc.comp_unit)
{
DWARFCompileUnit* dwarf_cu = info->GetCompileUnit(sc.comp_unit->GetID()).get();
if (dwarf_cu == NULL)
return 0;
uint32_t vars_added = 0;
VariableListSP variables (sc.comp_unit->GetVariableList(false));
if (variables.get() == NULL)
{
variables.reset(new VariableList());
sc.comp_unit->SetVariableList(variables);
DWARFCompileUnit* match_dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
DIEArray die_offsets;
if (m_using_apple_tables)
{
if (m_apple_names_ap.get())
{
DWARFMappedHash::DIEInfoArray hash_data_array;
if (m_apple_names_ap->AppendAllDIEsInRange (dwarf_cu->GetOffset(),
dwarf_cu->GetNextCompileUnitOffset(),
hash_data_array))
{
DWARFMappedHash::ExtractDIEArray (hash_data_array, die_offsets);
}
}
}
else
{
// Index if we already haven't to make sure the compile units
// get indexed and make their global DIE index list
if (!m_indexed)
Index ();
m_global_index.FindAllEntriesForCompileUnit (dwarf_cu->GetOffset(),
dwarf_cu->GetNextCompileUnitOffset(),
die_offsets);
}
const size_t num_matches = die_offsets.size();
if (num_matches)
{
DWARFDebugInfo* debug_info = DebugInfo();
for (size_t i=0; i<num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = debug_info->GetDIEPtrWithCompileUnitHint (die_offset, &match_dwarf_cu);
if (die)
{
VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, LLDB_INVALID_ADDRESS));
if (var_sp)
{
variables->AddVariableIfUnique (var_sp);
++vars_added;
}
}
else
{
if (m_using_apple_tables)
{
GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("the DWARF debug information has been modified (.apple_names accelerator table had bad die 0x%8.8x)\n", die_offset);
}
}
}
}
}
return vars_added;
}
}
return 0;
}
VariableSP
SymbolFileDWARF::ParseVariableDIE
(
const SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
const lldb::addr_t func_low_pc
)
{
VariableSP var_sp (m_die_to_variable_sp[die]);
if (var_sp)
return var_sp; // Already been parsed!
const dw_tag_t tag = die->Tag();
ModuleSP module = GetObjectFile()->GetModule();
if ((tag == DW_TAG_variable) ||
(tag == DW_TAG_constant) ||
(tag == DW_TAG_formal_parameter && sc.function))
{
DWARFDebugInfoEntry::Attributes attributes;
const size_t num_attributes = die->GetAttributes(this, dwarf_cu, NULL, attributes);
if (num_attributes > 0)
{
const char *name = NULL;
const char *mangled = NULL;
Declaration decl;
uint32_t i;
lldb::user_id_t type_uid = LLDB_INVALID_UID;
DWARFExpression location;
bool is_external = false;
bool is_artificial = false;
bool location_is_const_value_data = false;
bool has_explicit_location = false;
DWARFFormValue const_value;
//AccessType accessibility = eAccessNone;
for (i=0; i<num_attributes; ++i)
{
dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attributes.ExtractFormValueAtIndex(this, i, form_value))
{
switch (attr)
{
case DW_AT_decl_file: decl.SetFile(sc.comp_unit->GetSupportFiles().GetFileSpecAtIndex(form_value.Unsigned())); break;
case DW_AT_decl_line: decl.SetLine(form_value.Unsigned()); break;
case DW_AT_decl_column: decl.SetColumn(form_value.Unsigned()); break;
case DW_AT_name: name = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_linkage_name:
case DW_AT_MIPS_linkage_name: mangled = form_value.AsCString(&get_debug_str_data()); break;
case DW_AT_type: type_uid = form_value.Reference(); break;
case DW_AT_external: is_external = form_value.Boolean(); break;
case DW_AT_const_value:
// If we have already found a DW_AT_location attribute, ignore this attribute.
if (!has_explicit_location)
{
location_is_const_value_data = true;
// The constant value will be either a block, a data value or a string.
const DWARFDataExtractor& debug_info_data = get_debug_info_data();
if (DWARFFormValue::IsBlockForm(form_value.Form()))
{
// Retrieve the value as a block expression.
uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
uint32_t block_length = form_value.Unsigned();
location.CopyOpcodeData(module, debug_info_data, block_offset, block_length);
}
else if (DWARFFormValue::IsDataForm(form_value.Form()))
{
// Retrieve the value as a data expression.
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
uint32_t data_length = fixed_form_sizes[form_value.Form()];
if (data_length == 0)
{
const uint8_t *data_pointer = form_value.BlockData();
if (data_pointer)
{
form_value.Unsigned();
}
else if (DWARFFormValue::IsDataForm(form_value.Form()))
{
// we need to get the byte size of the type later after we create the variable
const_value = form_value;
}
}
else
location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
}
else
{
// Retrieve the value as a string expression.
if (form_value.Form() == DW_FORM_strp)
{
const uint8_t *fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize (attributes.CompileUnitAtIndex(i)->GetAddressByteSize(), attributes.CompileUnitAtIndex(i)->IsDWARF64());
uint32_t data_offset = attributes.DIEOffsetAtIndex(i);
uint32_t data_length = fixed_form_sizes[form_value.Form()];
location.CopyOpcodeData(module, debug_info_data, data_offset, data_length);
}
else
{
const char *str = form_value.AsCString(&debug_info_data);
uint32_t string_offset = str - (const char *)debug_info_data.GetDataStart();
uint32_t string_length = strlen(str) + 1;
location.CopyOpcodeData(module, debug_info_data, string_offset, string_length);
}
}
}
break;
case DW_AT_location:
{
location_is_const_value_data = false;
has_explicit_location = true;
if (form_value.BlockData())
{
const DWARFDataExtractor& debug_info_data = get_debug_info_data();
uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
uint32_t block_length = form_value.Unsigned();
location.CopyOpcodeData(module, get_debug_info_data(), block_offset, block_length);
}
else
{
const DWARFDataExtractor& debug_loc_data = get_debug_loc_data();
const dw_offset_t debug_loc_offset = form_value.Unsigned();
size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
if (loc_list_length > 0)
{
location.CopyOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length);
assert (func_low_pc != LLDB_INVALID_ADDRESS);
location.SetLocationListSlide (func_low_pc - attributes.CompileUnitAtIndex(i)->GetBaseAddress());
}
}
}
break;
case DW_AT_artificial: is_artificial = form_value.Boolean(); break;
case DW_AT_accessibility: break; //accessibility = DW_ACCESS_to_AccessType(form_value.Unsigned()); break;
case DW_AT_declaration:
case DW_AT_description:
case DW_AT_endianity:
case DW_AT_segment:
case DW_AT_start_scope:
case DW_AT_visibility:
default:
case DW_AT_abstract_origin:
case DW_AT_sibling:
case DW_AT_specification:
break;
}
}
}
ValueType scope = eValueTypeInvalid;
const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(die);
dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
SymbolContextScope * symbol_context_scope = NULL;
if (!mangled)
{
// LLDB relies on the mangled name (DW_TAG_linkage_name or DW_AT_MIPS_linkage_name) to
// generate fully qualified names of global variables with commands like "frame var j".
// For example, if j were an int variable holding a value 4 and declared in a namespace
// B which in turn is contained in a namespace A, the command "frame var j" returns
// "(int) A::B::j = 4". If the compiler does not emit a linkage name, we should be able
// to generate a fully qualified name from the declaration context.
if (die->GetParent()->Tag() == DW_TAG_compile_unit &&
LanguageRuntime::LanguageIsCPlusPlus(dwarf_cu->GetLanguageType()))
{
DWARFDeclContext decl_ctx;
die->GetDWARFDeclContext(this, dwarf_cu, decl_ctx);
mangled = decl_ctx.GetQualifiedNameAsConstString().GetCString();
}
}
// DWARF doesn't specify if a DW_TAG_variable is a local, global
// or static variable, so we have to do a little digging by
// looking at the location of a variable to see if it contains
// a DW_OP_addr opcode _somewhere_ in the definition. I say
// somewhere because clang likes to combine small global variables
// into the same symbol and have locations like:
// DW_OP_addr(0x1000), DW_OP_constu(2), DW_OP_plus
// So if we don't have a DW_TAG_formal_parameter, we can look at
// the location to see if it contains a DW_OP_addr opcode, and
// then we can correctly classify our variables.
if (tag == DW_TAG_formal_parameter)
scope = eValueTypeVariableArgument;
else
{
bool op_error = false;
// Check if the location has a DW_OP_addr with any address value...
lldb::addr_t location_DW_OP_addr = LLDB_INVALID_ADDRESS;
if (!location_is_const_value_data)
{
location_DW_OP_addr = location.GetLocation_DW_OP_addr (0, op_error);
if (op_error)
{
StreamString strm;
location.DumpLocationForAddress (&strm, eDescriptionLevelFull, 0, 0, NULL);
GetObjectFile()->GetModule()->ReportError ("0x%8.8x: %s has an invalid location: %s", die->GetOffset(), DW_TAG_value_to_name(die->Tag()), strm.GetString().c_str());
}
}
if (location_DW_OP_addr != LLDB_INVALID_ADDRESS)
{
if (is_external)
scope = eValueTypeVariableGlobal;
else
scope = eValueTypeVariableStatic;
SymbolFileDWARFDebugMap *debug_map_symfile = GetDebugMapSymfile ();
if (debug_map_symfile)
{
// When leaving the DWARF in the .o files on darwin,
// when we have a global variable that wasn't initialized,
// the .o file might not have allocated a virtual
// address for the global variable. In this case it will
// have created a symbol for the global variable
// that is undefined/data and external and the value will
// be the byte size of the variable. When we do the
// address map in SymbolFileDWARFDebugMap we rely on
// having an address, we need to do some magic here
// so we can get the correct address for our global
// variable. The address for all of these entries
// will be zero, and there will be an undefined symbol
// in this object file, and the executable will have
// a matching symbol with a good address. So here we
// dig up the correct address and replace it in the
// location for the variable, and set the variable's
// symbol context scope to be that of the main executable
// so the file address will resolve correctly.
bool linked_oso_file_addr = false;
if (is_external && location_DW_OP_addr == 0)
{
// we have a possible uninitialized extern global
ConstString const_name(mangled ? mangled : name);
ObjectFile *debug_map_objfile = debug_map_symfile->GetObjectFile();
if (debug_map_objfile)
{
Symtab *debug_map_symtab = debug_map_objfile->GetSymtab();
if (debug_map_symtab)
{
Symbol *exe_symbol = debug_map_symtab->FindFirstSymbolWithNameAndType (const_name,
eSymbolTypeData,
Symtab::eDebugYes,
Symtab::eVisibilityExtern);
if (exe_symbol)
{
if (exe_symbol->ValueIsAddress())
{
const addr_t exe_file_addr = exe_symbol->GetAddress().GetFileAddress();
if (exe_file_addr != LLDB_INVALID_ADDRESS)
{
if (location.Update_DW_OP_addr (exe_file_addr))
{
linked_oso_file_addr = true;
symbol_context_scope = exe_symbol;
}
}
}
}
}
}
}
if (!linked_oso_file_addr)
{
// The DW_OP_addr is not zero, but it contains a .o file address which
// needs to be linked up correctly.
const lldb::addr_t exe_file_addr = debug_map_symfile->LinkOSOFileAddress(this, location_DW_OP_addr);
if (exe_file_addr != LLDB_INVALID_ADDRESS)
{
// Update the file address for this variable
location.Update_DW_OP_addr (exe_file_addr);
}
else
{
// Variable didn't make it into the final executable
return var_sp;
}
}
}
}
else
{
scope = eValueTypeVariableLocal;
}
}
if (symbol_context_scope == NULL)
{
switch (parent_tag)
{
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_lexical_block:
if (sc.function)
{
symbol_context_scope = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
if (symbol_context_scope == NULL)
symbol_context_scope = sc.function;
}
break;
default:
symbol_context_scope = sc.comp_unit;
break;
}
}
if (symbol_context_scope)
{
SymbolFileTypeSP type_sp(new SymbolFileType(*this, type_uid));
if (const_value.Form() && type_sp && type_sp->GetType())
location.CopyOpcodeData(const_value.Unsigned(), type_sp->GetType()->GetByteSize(), dwarf_cu->GetAddressByteSize());
var_sp.reset (new Variable (MakeUserID(die->GetOffset()),
name,
mangled,
type_sp,
scope,
symbol_context_scope,
&decl,
location,
is_external,
is_artificial));
var_sp->SetLocationIsConstantValueData (location_is_const_value_data);
}
else
{
// Not ready to parse this variable yet. It might be a global
// or static variable that is in a function scope and the function
// in the symbol context wasn't filled in yet
return var_sp;
}
}
// Cache var_sp even if NULL (the variable was just a specification or
// was missing vital information to be able to be displayed in the debugger
// (missing location due to optimization, etc)) so we don't re-parse
// this DIE over and over later...
m_die_to_variable_sp[die] = var_sp;
}
return var_sp;
}
const DWARFDebugInfoEntry *
SymbolFileDWARF::FindBlockContainingSpecification (dw_offset_t func_die_offset,
dw_offset_t spec_block_die_offset,
DWARFCompileUnit **result_die_cu_handle)
{
// Give the concrete function die specified by "func_die_offset", find the
// concrete block whose DW_AT_specification or DW_AT_abstract_origin points
// to "spec_block_die_offset"
DWARFDebugInfo* info = DebugInfo();
const DWARFDebugInfoEntry *die = info->GetDIEPtrWithCompileUnitHint(func_die_offset, result_die_cu_handle);
if (die)
{
assert (*result_die_cu_handle);
return FindBlockContainingSpecification (*result_die_cu_handle, die, spec_block_die_offset, result_die_cu_handle);
}
return NULL;
}
const DWARFDebugInfoEntry *
SymbolFileDWARF::FindBlockContainingSpecification(DWARFCompileUnit* dwarf_cu,
const DWARFDebugInfoEntry *die,
dw_offset_t spec_block_die_offset,
DWARFCompileUnit **result_die_cu_handle)
{
if (die)
{
switch (die->Tag())
{
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_lexical_block:
{
if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_specification, DW_INVALID_OFFSET) == spec_block_die_offset)
{
*result_die_cu_handle = dwarf_cu;
return die;
}
if (die->GetAttributeValueAsReference (this, dwarf_cu, DW_AT_abstract_origin, DW_INVALID_OFFSET) == spec_block_die_offset)
{
*result_die_cu_handle = dwarf_cu;
return die;
}
}
break;
}
// Give the concrete function die specified by "func_die_offset", find the
// concrete block whose DW_AT_specification or DW_AT_abstract_origin points
// to "spec_block_die_offset"
for (const DWARFDebugInfoEntry *child_die = die->GetFirstChild(); child_die != NULL; child_die = child_die->GetSibling())
{
const DWARFDebugInfoEntry *result_die = FindBlockContainingSpecification (dwarf_cu,
child_die,
spec_block_die_offset,
result_die_cu_handle);
if (result_die)
return result_die;
}
}
*result_die_cu_handle = NULL;
return NULL;
}
size_t
SymbolFileDWARF::ParseVariables
(
const SymbolContext& sc,
DWARFCompileUnit* dwarf_cu,
const lldb::addr_t func_low_pc,
const DWARFDebugInfoEntry *orig_die,
bool parse_siblings,
bool parse_children,
VariableList* cc_variable_list
)
{
if (orig_die == NULL)
return 0;
VariableListSP variable_list_sp;
size_t vars_added = 0;
const DWARFDebugInfoEntry *die = orig_die;
while (die != NULL)
{
dw_tag_t tag = die->Tag();
// Check to see if we have already parsed this variable or constant?
if (m_die_to_variable_sp[die])
{
if (cc_variable_list)
cc_variable_list->AddVariableIfUnique (m_die_to_variable_sp[die]);
}
else
{
// We haven't already parsed it, lets do that now.
if ((tag == DW_TAG_variable) ||
(tag == DW_TAG_constant) ||
(tag == DW_TAG_formal_parameter && sc.function))
{
if (variable_list_sp.get() == NULL)
{
const DWARFDebugInfoEntry *sc_parent_die = GetParentSymbolContextDIE(orig_die);
dw_tag_t parent_tag = sc_parent_die ? sc_parent_die->Tag() : 0;
switch (parent_tag)
{
case DW_TAG_compile_unit:
if (sc.comp_unit != NULL)
{
variable_list_sp = sc.comp_unit->GetVariableList(false);
if (variable_list_sp.get() == NULL)
{
variable_list_sp.reset(new VariableList());
sc.comp_unit->SetVariableList(variable_list_sp);
}
}
else
{
GetObjectFile()->GetModule()->ReportError ("parent 0x%8.8" PRIx64 " %s with no valid compile unit in symbol context for 0x%8.8" PRIx64 " %s.\n",
MakeUserID(sc_parent_die->GetOffset()),
DW_TAG_value_to_name (parent_tag),
MakeUserID(orig_die->GetOffset()),
DW_TAG_value_to_name (orig_die->Tag()));
}
break;
case DW_TAG_subprogram:
case DW_TAG_inlined_subroutine:
case DW_TAG_lexical_block:
if (sc.function != NULL)
{
// Check to see if we already have parsed the variables for the given scope
Block *block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(sc_parent_die->GetOffset()));
if (block == NULL)
{
// This must be a specification or abstract origin with
// a concrete block counterpart in the current function. We need
// to find the concrete block so we can correctly add the
// variable to it
DWARFCompileUnit *concrete_block_die_cu = dwarf_cu;
const DWARFDebugInfoEntry *concrete_block_die = FindBlockContainingSpecification (sc.function->GetID(),
sc_parent_die->GetOffset(),
&concrete_block_die_cu);
if (concrete_block_die)
block = sc.function->GetBlock(true).FindBlockByID(MakeUserID(concrete_block_die->GetOffset()));
}
if (block != NULL)
{
const bool can_create = false;
variable_list_sp = block->GetBlockVariableList (can_create);
if (variable_list_sp.get() == NULL)
{
variable_list_sp.reset(new VariableList());
block->SetVariableList(variable_list_sp);
}
}
}
break;
default:
GetObjectFile()->GetModule()->ReportError ("didn't find appropriate parent DIE for variable list for 0x%8.8" PRIx64 " %s.\n",
MakeUserID(orig_die->GetOffset()),
DW_TAG_value_to_name (orig_die->Tag()));
break;
}
}
if (variable_list_sp)
{
VariableSP var_sp (ParseVariableDIE(sc, dwarf_cu, die, func_low_pc));
if (var_sp)
{
variable_list_sp->AddVariableIfUnique (var_sp);
if (cc_variable_list)
cc_variable_list->AddVariableIfUnique (var_sp);
++vars_added;
}
}
}
}
bool skip_children = (sc.function == NULL && tag == DW_TAG_subprogram);
if (!skip_children && parse_children && die->HasChildren())
{
vars_added += ParseVariables(sc, dwarf_cu, func_low_pc, die->GetFirstChild(), true, true, cc_variable_list);
}
if (parse_siblings)
die = die->GetSibling();
else
die = NULL;
}
return vars_added;
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
ConstString
SymbolFileDWARF::GetPluginName()
{
return GetPluginNameStatic();
}
uint32_t
SymbolFileDWARF::GetPluginVersion()
{
return 1;
}
void
SymbolFileDWARF::CompleteTagDecl (void *baton, clang::TagDecl *decl)
{
SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
if (clang_type)
symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
}
void
SymbolFileDWARF::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl)
{
SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
ClangASTType clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl);
if (clang_type)
symbol_file_dwarf->ResolveClangOpaqueTypeDefinition (clang_type);
}
void
SymbolFileDWARF::DumpIndexes ()
{
StreamFile s(stdout, false);
s.Printf ("DWARF index for (%s) '%s':",
GetObjectFile()->GetModule()->GetArchitecture().GetArchitectureName(),
GetObjectFile()->GetFileSpec().GetPath().c_str());
s.Printf("\nFunction basenames:\n"); m_function_basename_index.Dump (&s);
s.Printf("\nFunction fullnames:\n"); m_function_fullname_index.Dump (&s);
s.Printf("\nFunction methods:\n"); m_function_method_index.Dump (&s);
s.Printf("\nFunction selectors:\n"); m_function_selector_index.Dump (&s);
s.Printf("\nObjective C class selectors:\n"); m_objc_class_selectors_index.Dump (&s);
s.Printf("\nGlobals and statics:\n"); m_global_index.Dump (&s);
s.Printf("\nTypes:\n"); m_type_index.Dump (&s);
s.Printf("\nNamepaces:\n"); m_namespace_index.Dump (&s);
}
void
SymbolFileDWARF::SearchDeclContext (const clang::DeclContext *decl_context,
const char *name,
llvm::SmallVectorImpl <clang::NamedDecl *> *results)
{
DeclContextToDIEMap::iterator iter = m_decl_ctx_to_die.find(decl_context);
if (iter == m_decl_ctx_to_die.end())
return;
for (DIEPointerSet::iterator pos = iter->second.begin(), end = iter->second.end(); pos != end; ++pos)
{
const DWARFDebugInfoEntry *context_die = *pos;
if (!results)
return;
DWARFDebugInfo* info = DebugInfo();
DIEArray die_offsets;
DWARFCompileUnit* dwarf_cu = NULL;
const DWARFDebugInfoEntry* die = NULL;
if (m_using_apple_tables)
{
if (m_apple_types_ap.get())
m_apple_types_ap->FindByName (name, die_offsets);
}
else
{
if (!m_indexed)
Index ();
m_type_index.Find (ConstString(name), die_offsets);
}
const size_t num_matches = die_offsets.size();
if (num_matches)
{
for (size_t i = 0; i < num_matches; ++i)
{
const dw_offset_t die_offset = die_offsets[i];
die = info->GetDIEPtrWithCompileUnitHint (die_offset, &dwarf_cu);
if (die->GetParent() != context_die)
continue;
Type *matching_type = ResolveType (dwarf_cu, die);
clang::QualType qual_type = matching_type->GetClangForwardType().GetQualType();
if (const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr()))
{
clang::TagDecl *tag_decl = tag_type->getDecl();
results->push_back(tag_decl);
}
else if (const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(qual_type.getTypePtr()))
{
clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
results->push_back(typedef_decl);
}
}
}
}
}
void
SymbolFileDWARF::FindExternalVisibleDeclsByName (void *baton,
const clang::DeclContext *decl_context,
clang::DeclarationName decl_name,
llvm::SmallVectorImpl <clang::NamedDecl *> *results)
{
switch (decl_context->getDeclKind())
{
case clang::Decl::Namespace:
case clang::Decl::TranslationUnit:
{
SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
symbol_file_dwarf->SearchDeclContext (decl_context, decl_name.getAsString().c_str(), results);
}
break;
default:
break;
}
}
bool
SymbolFileDWARF::LayoutRecordType(void *baton, const clang::RecordDecl *record_decl, uint64_t &size,
uint64_t &alignment,
llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
{
SymbolFileDWARF *symbol_file_dwarf = (SymbolFileDWARF *)baton;
return symbol_file_dwarf->LayoutRecordType (record_decl, size, alignment, field_offsets, base_offsets, vbase_offsets);
}
bool
SymbolFileDWARF::LayoutRecordType(const clang::RecordDecl *record_decl, uint64_t &bit_size, uint64_t &alignment,
llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &base_offsets,
llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits> &vbase_offsets)
{
Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
RecordDeclToLayoutMap::iterator pos = m_record_decl_to_layout_map.find (record_decl);
bool success = false;
base_offsets.clear();
vbase_offsets.clear();
if (pos != m_record_decl_to_layout_map.end())
{
bit_size = pos->second.bit_size;
alignment = pos->second.alignment;
field_offsets.swap(pos->second.field_offsets);
base_offsets.swap (pos->second.base_offsets);
vbase_offsets.swap (pos->second.vbase_offsets);
m_record_decl_to_layout_map.erase(pos);
success = true;
}
else
{
bit_size = 0;
alignment = 0;
field_offsets.clear();
}
if (log)
GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::LayoutRecordType (record_decl = %p, bit_size = %" PRIu64 ", alignment = %" PRIu64 ", field_offsets[%u],base_offsets[%u], vbase_offsets[%u]) success = %i",
static_cast<const void*>(record_decl),
bit_size, alignment,
static_cast<uint32_t>(field_offsets.size()),
static_cast<uint32_t>(base_offsets.size()),
static_cast<uint32_t>(vbase_offsets.size()),
success);
return success;
}
SymbolFileDWARFDebugMap *
SymbolFileDWARF::GetDebugMapSymfile ()
{
if (m_debug_map_symfile == NULL && !m_debug_map_module_wp.expired())
{
lldb::ModuleSP module_sp (m_debug_map_module_wp.lock());
if (module_sp)
{
SymbolVendor *sym_vendor = module_sp->GetSymbolVendor();
if (sym_vendor)
m_debug_map_symfile = (SymbolFileDWARFDebugMap *)sym_vendor->GetSymbolFile();
}
}
return m_debug_map_symfile;
}
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