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opnsense-src/contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp

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Vendor import of stripped lldb trunk r256633: https://llvm.org/svn/llvm-project/lldb/trunk@256633
2015-12-30 06:55:28 -05:00
//===-- DWARFASTParserClang.cpp ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DWARFASTParserClang.h"
#include "DWARFCompileUnit.h"
#include "DWARFDebugInfo.h"
#include "DWARFDeclContext.h"
#include "DWARFDefines.h"
#include "DWARFDIE.h"
#include "DWARFDIECollection.h"
#include "SymbolFileDWARF.h"
#include "SymbolFileDWARFDebugMap.h"
#include "UniqueDWARFASTType.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/Value.h"
#include "lldb/Host/Host.h"
#include "lldb/Symbol/ClangASTImporter.h"
#include "lldb/Symbol/ClangExternalASTSourceCommon.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/TypeMap.h"
#include "lldb/Target/Language.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include <map>
#include <vector>
//#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
using namespace lldb;
using namespace lldb_private;
DWARFASTParserClang::DWARFASTParserClang (ClangASTContext &ast) :
m_ast (ast),
m_die_to_decl_ctx (),
m_decl_ctx_to_die ()
{
}
DWARFASTParserClang::~DWARFASTParserClang ()
{
}
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 bool
DeclKindIsCXXClass (clang::Decl::Kind decl_kind)
{
switch (decl_kind)
{
case clang::Decl::CXXRecord:
case clang::Decl::ClassTemplateSpecialization:
return true;
default:
break;
}
return false;
}
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);
}
};
ClangASTImporter &
DWARFASTParserClang::GetClangASTImporter()
{
if (!m_clang_ast_importer_ap)
{
m_clang_ast_importer_ap.reset (new ClangASTImporter);
}
return *m_clang_ast_importer_ap;
}
TypeSP
DWARFASTParserClang::ParseTypeFromDWO (const DWARFDIE &die, Log *log)
{
ModuleSP dwo_module_sp = die.GetContainingDWOModule();
if (dwo_module_sp)
{
// This type comes from an external DWO module
std::vector<CompilerContext> dwo_context;
die.GetDWOContext(dwo_context);
TypeMap dwo_types;
if (dwo_module_sp->GetSymbolVendor()->FindTypes(dwo_context, true, dwo_types))
{
const size_t num_dwo_types = dwo_types.GetSize();
if (num_dwo_types == 1)
{
// 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
TypeSP dwo_type_sp = dwo_types.GetTypeAtIndex(0);
if (dwo_type_sp)
{
lldb_private::CompilerType dwo_type = dwo_type_sp->GetForwardCompilerType();
lldb_private::CompilerType type = GetClangASTImporter().CopyType (m_ast, dwo_type);
//printf ("copied_qual_type: ast = %p, clang_type = %p, name = '%s'\n", m_ast, copied_qual_type.getAsOpaquePtr(), external_type->GetName().GetCString());
if (type)
{
SymbolFileDWARF *dwarf = die.GetDWARF();
TypeSP type_sp (new Type (die.GetID(),
dwarf,
dwo_type_sp->GetName(),
dwo_type_sp->GetByteSize(),
NULL,
LLDB_INVALID_UID,
Type::eEncodingInvalid,
&dwo_type_sp->GetDeclaration(),
type,
Type::eResolveStateForward));
dwarf->GetTypeList()->Insert(type_sp);
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
clang::TagDecl *tag_decl = ClangASTContext::GetAsTagDecl(type);
if (tag_decl)
LinkDeclContextToDIE(tag_decl, die);
else
{
clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(die);
if (defn_decl_ctx)
LinkDeclContextToDIE(defn_decl_ctx, die);
}
return type_sp;
}
}
}
}
}
return TypeSP();
}
TypeSP
DWARFASTParserClang::ParseTypeFromDWARF (const SymbolContext& sc,
const DWARFDIE &die,
Log *log,
bool *type_is_new_ptr)
{
TypeSP type_sp;
if (type_is_new_ptr)
*type_is_new_ptr = false;
AccessType accessibility = eAccessNone;
if (die)
{
SymbolFileDWARF *dwarf = die.GetDWARF();
if (log)
{
DWARFDIE context_die;
clang::DeclContext *context = GetClangDeclContextContainingDIE (die, &context_die);
dwarf->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(),
die.GetTagAsCString(),
die.GetName());
}
//
// Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
// if (log && dwarf_cu)
// {
// StreamString s;
// die->DumpLocation (this, dwarf_cu, s);
// dwarf->GetObjectFile()->GetModule()->LogMessage (log, "SymbolFileDwarf::%s %s", __FUNCTION__, s.GetData());
//
// }
Type *type_ptr = dwarf->GetDIEToType().lookup (die.GetDIE());
TypeList* type_list = dwarf->GetTypeList();
if (type_ptr == NULL)
{
if (type_is_new_ptr)
*type_is_new_ptr = true;
const dw_tag_t tag = die.Tag();
bool is_forward_declaration = false;
DWARFAttributes 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;
CompilerType 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
dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
const size_t num_attributes = die.GetAttributes (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(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();
// 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 = DIERef(form_value).GetUID(); break;
default:
case DW_AT_sibling:
break;
}
}
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\") type => 0x%8.8lx\n", die.GetID(), 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 = m_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 = m_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)
dwarf->GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'id' built-in type.",
die.GetOffset(),
die.GetTagAsCString(),
die.GetName());
clang_type = m_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)
dwarf->GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'Class' built-in type.",
die.GetOffset(),
die.GetTagAsCString(),
die.GetName());
clang_type = m_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)
dwarf->GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is Objective C 'selector' built-in type.",
die.GetOffset(),
die.GetTagAsCString(),
die.GetName());
clang_type = m_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".
const DWARFDIE encoding_die = die.GetDIE(encoding_uid);
if (encoding_die && encoding_die.Tag() == DW_TAG_structure_type)
{
if (const char *struct_name = encoding_die.GetName())
{
if (!strcmp(struct_name, "objc_object"))
{
if (log)
dwarf->GetObjectFile()->GetModule()->LogMessage (log,
"SymbolFileDWARF::ParseType (die = 0x%8.8x) %s '%s' is 'objc_object*', which we overrode to 'id'.",
die.GetOffset(),
die.GetTagAsCString(),
die.GetName());
clang_type = m_ast.GetBasicType(eBasicTypeObjCID);
encoding_data_type = Type::eEncodingIsUID;
encoding_uid = LLDB_INVALID_UID;
resolve_state = Type::eResolveStateFull;
}
}
}
}
}
}
type_sp.reset( new Type (die.GetID(),
dwarf,
type_name_const_str,
byte_size,
NULL,
encoding_uid,
encoding_data_type,
&decl,
clang_type,
resolve_state));
dwarf->GetDIEToType()[die.GetDIE()] = 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
dwarf->GetDIEToType()[die.GetDIE()] = 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 (attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(i, form_value))
{
switch (attr)
{
case DW_AT_decl_file:
if (die.GetCU()->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();
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());
if (type_name_const_str)
{
LanguageType die_language = die.GetLanguage();
bool handled = false;
if (Language::LanguageIsCPlusPlus(die_language))
{
std::string qualified_name;
if (die.GetQualifiedName(qualified_name))
{
handled = true;
ConstString const_qualified_name(qualified_name);
if (dwarf->GetUniqueDWARFASTTypeMap().Find(const_qualified_name, die, Declaration(),
byte_size_valid ? byte_size : -1,
*unique_ast_entry_ap))
{
type_sp = unique_ast_entry_ap->m_type_sp;
if (type_sp)
{
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
return type_sp;
}
}
}
}
if (!handled)
{
if (dwarf->GetUniqueDWARFASTTypeMap().Find(type_name_const_str, die, decl,
byte_size_valid ? byte_size : -1,
*unique_ast_entry_ap))
{
type_sp = unique_ast_entry_ap->m_type_sp;
if (type_sp)
{
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
return type_sp;
}
}
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), 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 && die.Supports_DW_AT_APPLE_objc_complete_type())
{
// 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 = dwarf->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
if (!type_sp)
{
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
if (debug_map_symfile)
{
// We weren't able to find a full declaration in
// this DWARF, see if we have a declaration anywhere
// else...
type_sp = debug_map_symfile->FindCompleteObjCDefinitionTypeForDIE (die, type_name_const_str, true);
}
}
if (type_sp)
{
if (log)
{
dwarf->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
dwarf->GetDIEToType()[die.GetDIE()] = 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)
{
dwarf->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);
}
// See if the type comes from a DWO module and if so, track down that type.
type_sp = ParseTypeFromDWO(die, log);
if (type_sp)
return type_sp;
DWARFDeclContext die_decl_ctx;
die.GetDWARFDeclContext(die_decl_ctx);
//type_sp = FindDefinitionTypeForDIE (dwarf_cu, die, type_name_const_str);
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
if (!type_sp)
{
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
if (debug_map_symfile)
{
// We weren't able to find a full declaration in
// this DWARF, see if we have a declaration anywhere
// else...
type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
}
}
if (type_sp)
{
if (log)
{
dwarf->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
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(
dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID())));
if (defn_decl_ctx)
LinkDeclContextToDIE(defn_decl_ctx, die);
return type_sp;
}
}
assert (tag_decl_kind != -1);
bool clang_type_was_created = false;
clang_type.SetCompilerType(&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE()));
if (!clang_type)
{
clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE (die, nullptr);
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(die.GetID());
metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual (die));
if (type_name_cstr && strchr (type_name_cstr, '<'))
{
ClangASTContext::TemplateParameterInfos template_param_infos;
if (ParseTemplateParameterInfos (die, template_param_infos))
{
clang::ClassTemplateDecl *class_template_decl = m_ast.ParseClassTemplateDecl (decl_ctx,
accessibility,
type_name_cstr,
tag_decl_kind,
template_param_infos);
clang::ClassTemplateSpecializationDecl *class_specialization_decl = m_ast.CreateClassTemplateSpecializationDecl (decl_ctx,
class_template_decl,
tag_decl_kind,
template_param_infos);
clang_type = m_ast.CreateClassTemplateSpecializationType (class_specialization_decl);
clang_type_was_created = true;
m_ast.SetMetadata (class_template_decl, metadata);
m_ast.SetMetadata (class_specialization_decl, metadata);
}
}
if (!clang_type_was_created)
{
clang_type_was_created = true;
clang_type = m_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(m_ast.GetDeclContextForType(clang_type), die);
type_sp.reset (new Type (die.GetID(),
dwarf,
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_die = die;
unique_ast_entry_ap->m_declaration = decl;
unique_ast_entry_ap->m_byte_size = byte_size;
dwarf->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
DWARFDIE 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.Clear();
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
ClangASTContext::StartTagDeclarationDefinition (clang_type);
ClangASTContext::CompleteTagDeclarationDefinition (clang_type);
if (tag == DW_TAG_structure_type) // this only applies in C
{
clang::RecordDecl *record_decl = ClangASTContext::GetAsRecordDecl(clang_type);
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)
ClangASTContext::StartTagDeclarationDefinition (clang_type);
// 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::CompleteType(Type *)"
// When the definition needs to be defined.
assert(!dwarf->GetForwardDeclClangTypeToDie().count(ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()) &&
"Type already in the forward declaration map!");
assert(((SymbolFileDWARF*)m_ast.GetSymbolFile())->UserIDMatches(die.GetDIERef().GetUID()) &&
"Adding incorrect type to forward declaration map");
dwarf->GetForwardDeclDieToClangType()[die.GetDIE()] = clang_type.GetOpaqueQualType();
dwarf->GetForwardDeclClangTypeToDie()[ClangASTContext::RemoveFastQualifiers(clang_type).GetOpaqueQualType()] = die.GetDIERef();
m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), true);
}
}
}
break;
case DW_TAG_enumeration_type:
{
// Set a bit that lets us know that we are currently parsing this
dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
DWARFFormValue encoding_form;
const size_t num_attributes = die.GetAttributes (attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(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();
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_type: encoding_form = form_value; 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: 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;
}
}
}
if (is_forward_declaration)
{
type_sp = ParseTypeFromDWO(die, log);
if (type_sp)
return type_sp;
DWARFDeclContext die_decl_ctx;
die.GetDWARFDeclContext(die_decl_ctx);
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
if (!type_sp)
{
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
if (debug_map_symfile)
{
// We weren't able to find a full declaration in
// this DWARF, see if we have a declaration anywhere
// else...
type_sp = debug_map_symfile->FindDefinitionTypeForDWARFDeclContext (die_decl_ctx);
}
}
if (type_sp)
{
if (log)
{
dwarf->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
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
clang::DeclContext *defn_decl_ctx = GetCachedClangDeclContextForDIE(
dwarf->DebugInfo()->GetDIE(DIERef(type_sp->GetID())));
if (defn_decl_ctx)
LinkDeclContextToDIE(defn_decl_ctx, die);
return type_sp;
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr);
CompilerType enumerator_clang_type;
clang_type.SetCompilerType (&m_ast, dwarf->GetForwardDeclDieToClangType().lookup (die.GetDIE()));
if (!clang_type)
{
if (encoding_form.IsValid())
{
Type *enumerator_type = dwarf->ResolveTypeUID(DIERef(encoding_form).GetUID());
if (enumerator_type)
enumerator_clang_type = enumerator_type->GetFullCompilerType ();
}
if (!enumerator_clang_type)
enumerator_clang_type = m_ast.GetBuiltinTypeForDWARFEncodingAndBitSize (NULL,
DW_ATE_signed,
byte_size * 8);
clang_type = m_ast.CreateEnumerationType (type_name_cstr,
GetClangDeclContextContainingDIE (die, nullptr),
decl,
enumerator_clang_type);
}
else
{
enumerator_clang_type = m_ast.GetEnumerationIntegerType (clang_type.GetOpaqueQualType());
}
LinkDeclContextToDIE(ClangASTContext::GetDeclContextForType(clang_type), die);
type_sp.reset( new Type (die.GetID(),
dwarf,
type_name_const_str,
byte_size,
NULL,
DIERef(encoding_form).GetUID(),
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateForward));
ClangASTContext::StartTagDeclarationDefinition (clang_type);
if (die.HasChildren())
{
SymbolContext cu_sc(die.GetLLDBCompileUnit());
bool is_signed = false;
enumerator_clang_type.IsIntegerType(is_signed);
ParseChildEnumerators(cu_sc, clang_type, is_signed, type_sp->GetByteSize(), die);
}
ClangASTContext::CompleteTagDeclarationDefinition (clang_type);
}
}
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
dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
DWARFFormValue type_die_form;
bool is_variadic = false;
bool is_inline = false;
bool is_static = false;
bool is_virtual = false;
bool is_explicit = false;
bool is_artificial = false;
DWARFFormValue specification_die_form;
DWARFFormValue abstract_origin_die_form;
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 (attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(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();
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(&dwarf->get_debug_str_data()); break;
case DW_AT_type: type_die_form = form_value; 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_form = form_value;
break;
case DW_AT_abstract_origin:
abstract_origin_die_form = form_value;
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)
{
DWARFDIE object_pointer_die = die.GetDIE (object_pointer_die_offset);
if (object_pointer_die)
{
const char *object_pointer_name_cstr = object_pointer_die.GetName();
if (object_pointer_name_cstr)
object_pointer_name = object_pointer_name_cstr;
}
}
DEBUG_PRINTF ("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr);
CompilerType return_clang_type;
Type *func_type = NULL;
if (type_die_form.IsValid())
func_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID());
if (func_type)
return_clang_type = func_type->GetForwardCompilerType ();
else
return_clang_type = m_ast.GetBasicType(eBasicTypeVoid);
std::vector<CompilerType> function_param_types;
std::vector<clang::ParmVarDecl*> function_param_decls;
// Parse the function children for the parameters
DWARFDIE decl_ctx_die;
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (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,
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 = m_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 ||
tag == DW_TAG_inlined_subroutine)
{
ObjCLanguage::MethodName objc_method (type_name_cstr, true);
if (objc_method.IsValid(true))
{
CompilerType class_opaque_type;
ConstString class_name(objc_method.GetClassName());
if (class_name)
{
TypeSP complete_objc_class_type_sp (dwarf->FindCompleteObjCDefinitionTypeForDIE (DWARFDIE(), class_name, false));
if (complete_objc_class_type_sp)
{
CompilerType type_clang_forward_type = complete_objc_class_type_sp->GetForwardCompilerType ();
if (ClangASTContext::IsObjCObjectOrInterfaceType(type_clang_forward_type))
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 = m_ast.AddMethodToObjCObjectType (class_opaque_type,
type_name_cstr,
clang_type,
accessibility,
is_artificial);
type_handled = objc_method_decl != NULL;
if (type_handled)
{
LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(objc_method_decl), die);
m_ast.SetMetadataAsUserID (objc_method_decl, die.GetID());
}
else
{
dwarf->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 = dwarf->ResolveType (decl_ctx_die);
if (class_type)
{
bool alternate_defn = false;
if (class_type->GetID() != decl_ctx_die.GetID() || decl_ctx_die.GetContainingDWOModuleDIE())
{
alternate_defn = true;
// 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;
DWARFDIE class_type_die;
SymbolFileDWARFDebugMap *debug_map_symfile = dwarf->GetDebugMapSymfile();
if (debug_map_symfile)
{
class_symfile = debug_map_symfile->GetSymbolFileByOSOIndex(SymbolFileDWARFDebugMap::GetOSOIndexFromUserID(class_type->GetID()));
class_type_die = class_symfile->DebugInfo()->GetDIE (DIERef(class_type->GetID()));
}
else
{
class_symfile = dwarf;
class_type_die = dwarf->DebugInfo()->GetDIE (DIERef(class_type->GetID()));
}
if (class_type_die)
{
DWARFDIECollection failures;
CopyUniqueClassMethodTypes (decl_ctx_die,
class_type_die,
class_type,
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 = dwarf->GetDIEToType()[die.GetDIE()];
if (type_ptr && type_ptr != DIE_IS_BEING_PARSED)
{
type_sp = type_ptr->shared_from_this();
break;
}
}
}
if (specification_die_form.IsValid())
{
// 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->GetForwardCompilerType ();
// If we have a specification, then the function type should have been
// made with the specification and not with this die.
DWARFDIE spec_die = dwarf->DebugInfo()->GetDIE(DIERef(specification_die_form));
clang::DeclContext *spec_clang_decl_ctx = GetClangDeclContextForDIE (spec_die);
if (spec_clang_decl_ctx)
{
LinkDeclContextToDIE(spec_clang_decl_ctx, die);
}
else
{
dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_specification(0x%8.8" PRIx64 ") has no decl\n",
die.GetID(),
specification_die_form.Reference());
}
type_handled = true;
}
else if (abstract_origin_die_form.IsValid())
{
// 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->GetForwardCompilerType ();
DWARFDIE abs_die = dwarf->DebugInfo()->GetDIE (DIERef(abstract_origin_die_form));
clang::DeclContext *abs_clang_decl_ctx = GetClangDeclContextForDIE (abs_die);
if (abs_clang_decl_ctx)
{
LinkDeclContextToDIE (abs_clang_decl_ctx, die);
}
else
{
dwarf->GetObjectFile()->GetModule()->ReportWarning ("0x%8.8" PRIx64 ": DW_AT_abstract_origin(0x%8.8" PRIx64 ") has no decl\n",
die.GetID(),
abstract_origin_die_form.Reference());
}
type_handled = true;
}
else
{
CompilerType class_opaque_type = class_type->GetForwardCompilerType ();
if (ClangASTContext::IsCXXClassType(class_opaque_type))
{
if (class_opaque_type.IsBeingDefined () || alternate_defn)
{
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
{
bool add_method = true;
if (alternate_defn)
{
// If an alternate definition for the class exists, then add the method only if an
// equivalent is not already present.
clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(class_opaque_type.GetOpaqueQualType());
if (record_decl)
{
for (auto method_iter = record_decl->method_begin();
method_iter != record_decl->method_end();
method_iter++)
{
clang::CXXMethodDecl *method_decl = *method_iter;
if (method_decl->getNameInfo().getAsString() == std::string(type_name_cstr))
{
if (method_decl->getType() == ClangASTContext::GetQualType(clang_type))
{
add_method = false;
LinkDeclContextToDIE(ClangASTContext::GetAsDeclContext(method_decl), die);
type_handled = true;
break;
}
}
}
}
}
if (add_method)
{
// 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(),
die.GetID(),
dwarf->GetObjectFile()->GetFileSpec().GetPath().c_str());
const bool is_attr_used = false;
// 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;
clang::CXXMethodDecl *cxx_method_decl;
cxx_method_decl = m_ast.AddMethodToCXXRecordType (class_opaque_type.GetOpaqueQualType(),
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(die.GetID());
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));
}
m_ast.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 dwarf->GetDIEToType() map. First
// we need to modify the dwarf->GetDIEToType() so it doesn't think we are
// trying to parse this DIE anymore...
dwarf->GetDIEToType()[die.GetDIE()] = 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->GetFullCompilerType ();
// The type for this DIE should have been filled in the function call above
type_ptr = dwarf->GetDIEToType()[die.GetDIE()];
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 = m_ast.CreateFunctionDeclaration (ignore_containing_context ? m_ast.GetTranslationUnitDecl() : containing_decl_ctx,
type_name_cstr,
clang_type,
storage,
is_inline);
// if (template_param_infos.GetSize() > 0)
// {
// clang::FunctionTemplateDecl *func_template_decl = CreateFunctionTemplateDecl (containing_decl_ctx,
// function_decl,
// type_name_cstr,
// template_param_infos);
//
// 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())
m_ast.SetFunctionParameters (function_decl,
&function_param_decls.front(),
function_param_decls.size());
ClangASTMetadata metadata;
metadata.SetUserID(die.GetID());
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));
}
m_ast.SetMetadata (function_decl, metadata);
}
}
type_sp.reset( new Type (die.GetID(),
dwarf,
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
dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
DWARFFormValue type_die_form;
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 (attributes);
if (num_attributes > 0)
{
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(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();
type_name_const_str.SetCString(type_name_cstr);
break;
case DW_AT_type: type_die_form = form_value; 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", die.GetID(), DW_TAG_value_to_name(tag), type_name_cstr);
Type *element_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID());
if (element_type)
{
std::vector<uint64_t> element_orders;
ParseChildArrayInfo(sc, die, first_index, element_orders, byte_stride, bit_stride);
if (byte_stride == 0 && bit_stride == 0)
byte_stride = element_type->GetByteSize();
CompilerType array_element_type = element_type->GetForwardCompilerType ();
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 = m_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 = m_ast.CreateArrayType (array_element_type, 0, is_vector);
}
ConstString empty_name;
type_sp.reset( new Type (die.GetID(),
dwarf,
empty_name,
array_element_bit_stride / 8,
NULL,
DIERef(type_die_form).GetUID(),
Type::eEncodingIsUID,
&decl,
clang_type,
Type::eResolveStateFull));
type_sp->SetEncodingType (element_type);
}
}
}
break;
case DW_TAG_ptr_to_member_type:
{
DWARFFormValue type_die_form;
DWARFFormValue containing_type_die_form;
const size_t num_attributes = die.GetAttributes (attributes);
if (num_attributes > 0) {
uint32_t i;
for (i=0; i<num_attributes; ++i)
{
attr = attributes.AttributeAtIndex(i);
if (attributes.ExtractFormValueAtIndex(i, form_value))
{
switch (attr)
{
case DW_AT_type:
type_die_form = form_value; break;
case DW_AT_containing_type:
containing_type_die_form = form_value; break;
}
}
}
Type *pointee_type = dwarf->ResolveTypeUID(DIERef(type_die_form).GetUID());
Type *class_type = dwarf->ResolveTypeUID(DIERef(containing_type_die_form).GetUID());
CompilerType pointee_clang_type = pointee_type->GetForwardCompilerType ();
CompilerType class_clang_type = class_type->GetLayoutCompilerType ();
clang_type = ClangASTContext::CreateMemberPointerType(class_clang_type, pointee_clang_type);
byte_size = clang_type.GetByteSize(nullptr);
type_sp.reset(new Type(die.GetID(), dwarf, type_name_const_str, byte_size, NULL,
LLDB_INVALID_UID, Type::eEncodingIsUID, NULL, clang_type,
Type::eResolveStateForward));
}
break;
}
default:
dwarf->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())
{
DWARFDIE sc_parent_die = SymbolFileDWARF::GetParentSymbolContextDIE(die);
dw_tag_t sc_parent_tag = sc_parent_die.Tag();
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(sc_parent_die.GetID());
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);
dwarf->GetDIEToType()[die.GetDIE()] = type_sp.get();
}
}
else if (type_ptr != DIE_IS_BEING_PARSED)
{
type_sp = type_ptr->shared_from_this();
}
}
return type_sp;
}
// DWARF parsing functions
class DWARFASTParserClang::DelayedAddObjCClassProperty
{
public:
DelayedAddObjCClassProperty(const CompilerType &class_opaque_type,
const char *property_name,
const CompilerType &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 ClangASTContext::AddObjCClassProperty (m_class_opaque_type,
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:
CompilerType m_class_opaque_type;
const char *m_property_name;
CompilerType 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;
};
bool
DWARFASTParserClang::ParseTemplateDIE (const DWARFDIE &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:
{
DWARFAttributes attributes;
const size_t num_attributes = die.GetAttributes (attributes);
const char *name = NULL;
Type *lldb_type = NULL;
CompilerType 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(i, form_value))
name = form_value.AsCString();
break;
case DW_AT_type:
if (attributes.ExtractFormValueAtIndex(i, form_value))
{
lldb_type = die.ResolveTypeUID(DIERef(form_value).GetUID());
if (lldb_type)
clang_type = lldb_type->GetForwardCompilerType ();
}
break;
case DW_AT_const_value:
if (attributes.ExtractFormValueAtIndex(i, form_value))
{
uval64_valid = true;
uval64 = form_value.Unsigned();
}
break;
default:
break;
}
}
clang::ASTContext *ast = m_ast.getASTContext();
if (!clang_type)
clang_type = m_ast.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),
ClangASTContext::GetQualType(clang_type)));
}
else
{
template_param_infos.args.push_back (clang::TemplateArgument (ClangASTContext::GetQualType(clang_type)));
}
}
else
{
return false;
}
}
}
return true;
default:
break;
}
return false;
}
bool
DWARFASTParserClang::ParseTemplateParameterInfos (const DWARFDIE &parent_die,
ClangASTContext::TemplateParameterInfos &template_param_infos)
{
if (!parent_die)
return false;
Args template_parameter_names;
for (DWARFDIE die = parent_die.GetFirstChild();
die.IsValid();
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 (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();
}
bool
DWARFASTParserClang::CanCompleteType (const lldb_private::CompilerType &compiler_type)
{
if (m_clang_ast_importer_ap)
return ClangASTContext::CanImport(compiler_type, GetClangASTImporter());
else
return false;
}
bool
DWARFASTParserClang::CompleteType (const lldb_private::CompilerType &compiler_type)
{
if (CanCompleteType(compiler_type))
{
if (ClangASTContext::Import(compiler_type, GetClangASTImporter()))
{
ClangASTContext::CompleteTagDeclarationDefinition(compiler_type);
return true;
}
else
{
ClangASTContext::SetHasExternalStorage (compiler_type.GetOpaqueQualType(), false);
}
}
return false;
}
bool
DWARFASTParserClang::CompleteTypeFromDWARF (const DWARFDIE &die,
lldb_private::Type *type,
CompilerType &clang_type)
{
// Disable external storage for this type so we don't get anymore
// clang::ExternalASTSource queries for this type.
m_ast.SetHasExternalStorage (clang_type.GetOpaqueQualType(), false);
if (!die)
return false;
const dw_tag_t tag = die.Tag();
SymbolFileDWARF *dwarf = die.GetDWARF();
Log *log = nullptr; // (LogChannelDWARF::GetLogIfAny(DWARF_LOG_DEBUG_INFO|DWARF_LOG_TYPE_COMPLETION));
if (log)
dwarf->GetObjectFile()->GetModule()->LogMessageVerboseBacktrace (log,
"0x%8.8" PRIx64 ": %s '%s' resolving forward declaration...",
die.GetID(),
die.GetTagAsCString(),
type->GetName().AsCString());
assert (clang_type);
DWARFAttributes 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 (ClangASTContext::IsObjCObjectOrInterfaceType(clang_type))
{
class_language = eLanguageTypeObjC;
// For objective C we don't start the definition when
// the class is created.
ClangASTContext::StartTagDeclarationDefinition (clang_type);
}
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(die.GetLLDBCompileUnit());
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,
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)
{
dwarf->ResolveType(member_function_dies.GetDIEAtIndex(i));
}
}
if (class_language == eLanguageTypeObjC)
{
ConstString class_name (clang_type.GetTypeName());
if (class_name)
{
DIEArray method_die_offsets;
dwarf->GetObjCMethodDIEOffsets(class_name, method_die_offsets);
if (!method_die_offsets.empty())
{
DWARFDebugInfo* debug_info = dwarf->DebugInfo();
const size_t num_matches = method_die_offsets.size();
for (size_t i=0; i<num_matches; ++i)
{
const DIERef& die_ref = method_die_offsets[i];
DWARFDIE method_die = debug_info->GetDIE (die_ref);
if (method_die)
method_die.ResolveType ();
}
}
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)
m_ast.SetTagTypeKind (ClangASTContext::GetQualType(clang_type), 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.
m_ast.SetDefaultAccessForRecordFields (m_ast.GetAsRecordDecl(clang_type),
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()
for (auto &base_class : base_classes)
{
clang::TypeSourceInfo *type_source_info = base_class->getTypeSourceInfo();
if (type_source_info)
{
CompilerType base_class_type (&m_ast, type_source_info->getType().getAsOpaquePtr());
if (base_class_type.GetCompleteType() == false)
{
auto module = dwarf->GetObjectFile()->GetModule();
module->ReportError (
":: Class '%s' has a base class '%s' which does not have a complete definition.",
die.GetName(),
base_class_type.GetTypeName().GetCString());
if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang)
module->ReportError (":: Try compiling the source file with -fno-limit-debug-info.");
// 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.
ClangASTContext::StartTagDeclarationDefinition (base_class_type);
ClangASTContext::CompleteTagDeclarationDefinition (base_class_type);
}
}
}
m_ast.SetBaseClassesForClassType (clang_type.GetOpaqueQualType(),
&base_classes.front(),
base_classes.size());
// Clang will copy each CXXBaseSpecifier in "base_classes"
// so we have to free them all.
ClangASTContext::DeleteBaseClassSpecifiers (&base_classes.front(),
base_classes.size());
}
}
}
ClangASTContext::BuildIndirectFields (clang_type);
ClangASTContext::CompleteTagDeclarationDefinition (clang_type);
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(DW_AT_byte_size, 0) * 8;
clang::CXXRecordDecl *record_decl = m_ast.GetAsCXXRecordDecl(clang_type.GetOpaqueQualType());
if (record_decl)
{
if (log)
{
ModuleSP module_sp = dwarf->GetObjectFile()->GetModule();
if (module_sp)
{
module_sp->LogMessage (log,
"ClangASTContext::CompleteTypeFromDWARF (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)
{
module_sp->LogMessage(log,
"ClangASTContext::CompleteTypeFromDWARF (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)
{
module_sp->LogMessage(log,
"ClangASTContext::CompleteTypeFromDWARF (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)
{
module_sp->LogMessage(log,
"ClangASTContext::CompleteTypeFromDWARF (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:
ClangASTContext::StartTagDeclarationDefinition (clang_type);
if (die.HasChildren())
{
SymbolContext sc(die.GetLLDBCompileUnit());
bool is_signed = false;
clang_type.IsIntegerType(is_signed);
ParseChildEnumerators(sc, clang_type, is_signed, type->GetByteSize(), die);
}
ClangASTContext::CompleteTagDeclarationDefinition (clang_type);
return (bool)clang_type;
default:
assert(false && "not a forward clang type decl!");
break;
}
return false;
}
std::vector<DWARFDIE>
DWARFASTParserClang::GetDIEForDeclContext(lldb_private::CompilerDeclContext decl_context)
{
std::vector<DWARFDIE> result;
for (auto it = m_decl_ctx_to_die.find((clang::DeclContext *)decl_context.GetOpaqueDeclContext()); it != m_decl_ctx_to_die.end(); it++)
result.push_back(it->second);
return result;
}
CompilerDecl
DWARFASTParserClang::GetDeclForUIDFromDWARF (const DWARFDIE &die)
{
clang::Decl *clang_decl = GetClangDeclForDIE(die);
if (clang_decl != nullptr)
return CompilerDecl(&m_ast, clang_decl);
return CompilerDecl();
}
CompilerDeclContext
DWARFASTParserClang::GetDeclContextForUIDFromDWARF (const DWARFDIE &die)
{
clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (die);
if (clang_decl_ctx)
return CompilerDeclContext(&m_ast, clang_decl_ctx);
return CompilerDeclContext();
}
CompilerDeclContext
DWARFASTParserClang::GetDeclContextContainingUIDFromDWARF (const DWARFDIE &die)
{
clang::DeclContext *clang_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr);
if (clang_decl_ctx)
return CompilerDeclContext(&m_ast, clang_decl_ctx);
return CompilerDeclContext();
}
size_t
DWARFASTParserClang::ParseChildEnumerators (const SymbolContext& sc,
lldb_private::CompilerType &clang_type,
bool is_signed,
uint32_t enumerator_byte_size,
const DWARFDIE &parent_die)
{
if (!parent_die)
return 0;
size_t enumerators_added = 0;
for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling())
{
const dw_tag_t tag = die.Tag();
if (tag == DW_TAG_enumerator)
{
DWARFAttributes attributes;
const size_t num_child_attributes = die.GetAttributes(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(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();
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)
{
m_ast.AddEnumerationValueToEnumerationType (clang_type.GetOpaqueQualType(),
m_ast.GetEnumerationIntegerType(clang_type.GetOpaqueQualType()),
decl,
name,
enum_value,
enumerator_byte_size * 8);
++enumerators_added;
}
}
}
}
return enumerators_added;
}
#if defined(LLDB_CONFIGURATION_DEBUG) || defined(LLDB_CONFIGURATION_RELEASE)
class DIEStack
{
public:
void Push (const DWARFDIE &die)
{
m_dies.push_back (die);
}
void LogDIEs (Log *log)
{
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++)
{
std::string qualified_name;
const DWARFDIE &die = m_dies[i];
die.GetQualifiedName(qualified_name);
log_strm.Printf ("[%" PRIu64 "] 0x%8.8x: %s name='%s'\n",
(uint64_t)i,
die.GetOffset(),
die.GetTagAsCString(),
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 (const DWARFDIE &die)
{
m_valid = true;
m_die_stack.Push (die);
}
~ScopedPopper ()
{
if (m_valid)
m_die_stack.Pop();
}
protected:
DIEStack &m_die_stack;
bool m_valid;
};
protected:
typedef std::vector<DWARFDIE> Stack;
Stack m_dies;
};
#endif
Function *
DWARFASTParserClang::ParseFunctionFromDWARF (const SymbolContext& sc,
const DWARFDIE &die)
{
DWARFRangeList 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(die.GetCU());
const dw_tag_t tag = die.Tag();
if (tag != DW_TAG_subprogram)
return NULL;
if (die.GetDIENamesAndRanges (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 (die.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 &&
Language::LanguageIsCPlusPlus(die.GetLanguage()) &&
name && 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<CompilerType> param_types;
std::vector<clang::ParmVarDecl*> param_decls;
DWARFDeclContext decl_ctx;
StreamString sstr;
die.GetDWARFDeclContext(decl_ctx);
sstr << decl_ctx.GetQualifiedName();
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(die, nullptr);
ParseChildParameters(sc,
containing_decl_ctx,
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));
SymbolFileDWARF *dwarf = die.GetDWARF();
// Supply the type _only_ if it has already been parsed
Type *func_type = dwarf->GetDIEToType().lookup (die.GetDIE());
assert(func_type == NULL || func_type != DIE_IS_BEING_PARSED);
if (dwarf->FixupAddress (func_range.GetBaseAddress()))
{
const user_id_t func_user_id = die.GetID();
func_sp.reset(new Function (sc.comp_unit,
func_user_id, // UserID is the DIE offset
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
DWARFASTParserClang::ParseChildMembers (const SymbolContext& sc,
const DWARFDIE &parent_die,
CompilerType &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)
return 0;
uint32_t member_idx = 0;
BitfieldInfo last_field_info;
ModuleSP module_sp = parent_die.GetDWARF()->GetObjectFile()->GetModule();
ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(class_clang_type.GetTypeSystem());
if (ast == nullptr)
return 0;
for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling())
{
dw_tag_t tag = die.Tag();
switch (tag)
{
case DW_TAG_member:
case DW_TAG_APPLE_property:
{
DWARFAttributes attributes;
const size_t num_attributes = die.GetAttributes (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;
DWARFFormValue encoding_form;
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(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(); break;
case DW_AT_type: encoding_form = form_value; 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 = die.GetDWARF()->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_sp,
debug_info_data,
die.GetCU(),
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();
break;
case DW_AT_APPLE_property_getter: prop_getter_name = form_value.AsCString();
break;
case DW_AT_APPLE_property_setter: prop_setter_name = form_value.AsCString();
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] == '-')
{
ObjCLanguage::MethodName prop_getter_method(prop_getter_name, true);
prop_getter_name = prop_getter_method.GetSelector().GetCString();
}
if (prop_setter_name && prop_setter_name[0] == '-')
{
ObjCLanguage::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 = die.ResolveTypeUID(DIERef(encoding_form).GetUID());
if (var_type)
{
if (accessibility == eAccessNone)
accessibility = eAccessPublic;
ClangASTContext::AddVariableToRecordType (class_clang_type,
name,
var_type->GetLayoutCompilerType (),
accessibility);
}
break;
}
if (is_artificial == false)
{
Type *member_type = die.ResolveTypeUID(DIERef(encoding_form).GetUID());
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 (die.GetDWARF()->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 = die.GetCU()->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 =
ClangASTContext::AddFieldToRecordType (class_clang_type,
NULL,
m_ast.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();
}
CompilerType member_clang_type = member_type->GetLayoutCompilerType ();
if (!member_clang_type.IsCompleteType())
member_clang_type.GetCompleteType();
{
// 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].
CompilerType 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(DW_AT_byte_size, UINT64_MAX);
if (member_byte_offset >= parent_byte_size)
{
Vendor import of lldb trunk r257626: https://llvm.org/svn/llvm-project/lldb/trunk@257626
2016-01-13 15:06:56 -05:00
if (member_array_size != 1 && (member_array_size != 0 || member_byte_offset > parent_byte_size))
Vendor import of stripped lldb trunk r256633: https://llvm.org/svn/llvm-project/lldb/trunk@256633
2015-12-30 06:55:28 -05:00
{
module_sp->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,
die.GetID(),
name,
encoding_form.Reference(),
parent_die.GetID());
}
member_clang_type = m_ast.CreateArrayType(member_array_element_type, 0, false);
}
}
}
if (ClangASTContext::IsCXXClassType(member_clang_type) && member_clang_type.GetCompleteType() == false)
{
if (die.GetCU()->GetProducer() == DWARFCompileUnit::eProducerClang)
module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nTry compiling the source file with -fno-limit-debug-info",
parent_die.GetOffset(),
parent_die.GetName(),
die.GetOffset(),
name);
else
module_sp->ReportError ("DWARF DIE at 0x%8.8x (class %s) has a member variable 0x%8.8x (%s) whose type is a forward declaration, not a complete definition.\nPlease file a bug against the compiler and include the preprocessed output for %s",
parent_die.GetOffset(),
parent_die.GetName(),
die.GetOffset(),
name,
sc.comp_unit ? sc.comp_unit->GetPath().c_str() : "the source file");
// We have no choice other than to pretend that the member class
// is complete. If we don't do this, clang will crash when trying
// to layout the class. 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.
ClangASTContext::StartTagDeclarationDefinition(member_clang_type);
ClangASTContext::CompleteTagDeclarationDefinition(member_clang_type);
}
field_decl = ClangASTContext::AddFieldToRecordType (class_clang_type,
name,
member_clang_type,
accessibility,
bit_size);
m_ast.SetMetadataAsUserID (field_decl, die.GetID());
layout_info.field_offsets.insert(std::make_pair(field_decl, field_bit_offset));
}
else
{
if (name)
module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member '%s' refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
die.GetID(),
name,
encoding_form.Reference());
else
module_sp->ReportError ("0x%8.8" PRIx64 ": DW_TAG_member refers to type 0x%8.8" PRIx64 " which was unable to be parsed",
die.GetID(),
encoding_form.Reference());
}
}
if (prop_name != NULL && member_type)
{
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 (die.GetID());
delayed_properties.push_back(DelayedAddObjCClassProperty(class_clang_type,
prop_name,
member_type->GetLayoutCompilerType (),
ivar_decl,
prop_setter_name,
prop_getter_name,
prop_attributes,
&metadata));
if (ivar_decl)
m_ast.SetMetadataAsUserID (ivar_decl, die.GetID());
}
}
}
++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
DWARFAttributes attributes;
const size_t num_attributes = die.GetAttributes (attributes);
if (num_attributes > 0)
{
Declaration decl;
DWARFExpression location(die.GetCU());
DWARFFormValue encoding_form;
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(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_form = form_value; break;
case DW_AT_data_member_location:
if (form_value.BlockData())
{
Value initialValue(0);
Value memberOffset(0);
const DWARFDataExtractor& debug_info_data = die.GetDWARF()->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_sp,
debug_info_data,
die.GetCU(),
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 = die.ResolveTypeUID(DIERef(encoding_form).GetUID());
if (base_class_type == NULL)
{
module_sp->ReportError("0x%8.8x: DW_TAG_inheritance failed to resolve the base class at 0x%8.8" PRIx64 " from enclosing type 0x%8.8x. \nPlease file a bug and attach the file at the start of this error message",
die.GetOffset(),
encoding_form.Reference(),
parent_die.GetOffset());
break;
}
CompilerType base_class_clang_type = base_class_type->GetFullCompilerType ();
assert (base_class_clang_type);
if (class_language == eLanguageTypeObjC)
{
ast->SetObjCSuperClass(class_clang_type, base_class_clang_type);
}
else
{
base_classes.push_back (ast->CreateBaseClassSpecifier (base_class_clang_type.GetOpaqueQualType(),
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(ast->GetAsCXXRecordDecl(base_class_clang_type.GetOpaqueQualType()),
clang::CharUnits::fromQuantity(member_byte_offset)));
}
}
}
}
break;
default:
break;
}
}
return true;
}
size_t
DWARFASTParserClang::ParseChildParameters (const SymbolContext& sc,
clang::DeclContext *containing_decl_ctx,
const DWARFDIE &parent_die,
bool skip_artificial,
bool &is_static,
bool &is_variadic,
std::vector<CompilerType>& function_param_types,
std::vector<clang::ParmVarDecl*>& function_param_decls,
unsigned &type_quals)
{
if (!parent_die)
return 0;
size_t arg_idx = 0;
for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling())
{
const dw_tag_t tag = die.Tag();
switch (tag)
{
case DW_TAG_formal_parameter:
{
DWARFAttributes attributes;
const size_t num_attributes = die.GetAttributes(attributes);
if (num_attributes > 0)
{
const char *name = NULL;
Declaration decl;
DWARFFormValue param_type_die_form;
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(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();
break;
case DW_AT_type: param_type_die_form = form_value; 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 = die.ResolveTypeUID (DIERef(param_type_die_form).GetUID());
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 = die.GetLLDBCompileUnit();
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 = die.ResolveTypeUID(DIERef(param_type_die_form).GetUID());
if (type)
{
function_param_types.push_back (type->GetForwardCompilerType ());
clang::ParmVarDecl *param_var_decl = m_ast.CreateParameterDeclaration (name,
type->GetForwardCompilerType (),
storage);
assert(param_var_decl);
function_param_decls.push_back(param_var_decl);
m_ast.SetMetadataAsUserID (param_var_decl, die.GetID());
}
}
}
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;
}
void
DWARFASTParserClang::ParseChildArrayInfo (const SymbolContext& sc,
const DWARFDIE &parent_die,
int64_t& first_index,
std::vector<uint64_t>& element_orders,
uint32_t& byte_stride,
uint32_t& bit_stride)
{
if (!parent_die)
return;
for (DWARFDIE die = parent_die.GetFirstChild(); die.IsValid(); die = die.GetSibling())
{
const dw_tag_t tag = die.Tag();
switch (tag)
{
case DW_TAG_subrange_type:
{
DWARFAttributes attributes;
const size_t num_child_attributes = die.GetAttributes(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(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;
}
}
}
Type *
DWARFASTParserClang::GetTypeForDIE (const DWARFDIE &die)
{
if (die)
{
SymbolFileDWARF *dwarf = die.GetDWARF();
DWARFAttributes attributes;
const size_t num_attributes = die.GetAttributes(attributes);
if (num_attributes > 0)
{
DWARFFormValue type_die_form;
for (size_t i = 0; i < num_attributes; ++i)
{
dw_attr_t attr = attributes.AttributeAtIndex(i);
DWARFFormValue form_value;
if (attr == DW_AT_type && attributes.ExtractFormValueAtIndex(i, form_value))
return dwarf->ResolveTypeUID(DIERef(form_value).GetUID());
}
}
}
return nullptr;
}
clang::Decl *
DWARFASTParserClang::GetClangDeclForDIE (const DWARFDIE &die)
{
if (!die)
return nullptr;
switch (die.Tag())
{
case DW_TAG_variable:
case DW_TAG_constant:
case DW_TAG_formal_parameter:
case DW_TAG_imported_declaration:
case DW_TAG_imported_module:
break;
default:
return nullptr;
}
DIEToDeclMap::iterator cache_pos = m_die_to_decl.find(die.GetDIE());
if (cache_pos != m_die_to_decl.end())
return cache_pos->second;
if (DWARFDIE spec_die = die.GetReferencedDIE(DW_AT_specification))
{
clang::Decl *decl = GetClangDeclForDIE(spec_die);
m_die_to_decl[die.GetDIE()] = decl;
m_decl_to_die[decl].insert(die.GetDIE());
return decl;
}
clang::Decl *decl = nullptr;
switch (die.Tag())
{
case DW_TAG_variable:
case DW_TAG_constant:
case DW_TAG_formal_parameter:
{
SymbolFileDWARF *dwarf = die.GetDWARF();
Type *type = GetTypeForDIE(die);
const char *name = die.GetName();
clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID()));
decl = m_ast.CreateVariableDeclaration(
decl_context,
name,
ClangASTContext::GetQualType(type->GetForwardCompilerType()));
break;
}
case DW_TAG_imported_declaration:
{
SymbolFileDWARF *dwarf = die.GetDWARF();
lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET);
if (dwarf->UserIDMatches(imported_uid))
{
CompilerDecl imported_decl = dwarf->GetDeclForUID(imported_uid);
if (imported_decl)
{
clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID()));
if (clang::NamedDecl *clang_imported_decl = llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)imported_decl.GetOpaqueDecl()))
decl = m_ast.CreateUsingDeclaration(decl_context, clang_imported_decl);
}
}
break;
}
case DW_TAG_imported_module:
{
SymbolFileDWARF *dwarf = die.GetDWARF();
lldb::user_id_t imported_uid = die.GetAttributeValueAsReference(DW_AT_import, DW_INVALID_OFFSET);
if (dwarf->UserIDMatches(imported_uid))
{
CompilerDeclContext imported_decl = dwarf->GetDeclContextForUID(imported_uid);
if (imported_decl)
{
clang::DeclContext *decl_context = ClangASTContext::DeclContextGetAsDeclContext(dwarf->GetDeclContextContainingUID(die.GetID()));
if (clang::NamespaceDecl *ns_decl = ClangASTContext::DeclContextGetAsNamespaceDecl(imported_decl))
decl = m_ast.CreateUsingDirectiveDeclaration(decl_context, ns_decl);
}
}
break;
}
default:
break;
}
m_die_to_decl[die.GetDIE()] = decl;
m_decl_to_die[decl].insert(die.GetDIE());
return decl;
}
clang::DeclContext *
DWARFASTParserClang::GetClangDeclContextForDIE (const DWARFDIE &die)
{
if (die)
{
clang::DeclContext *decl_ctx = GetCachedClangDeclContextForDIE (die);
if (decl_ctx)
return decl_ctx;
bool try_parsing_type = true;
switch (die.Tag())
{
case DW_TAG_compile_unit:
decl_ctx = m_ast.GetTranslationUnitDecl();
try_parsing_type = false;
break;
case DW_TAG_namespace:
decl_ctx = ResolveNamespaceDIE (die);
try_parsing_type = false;
break;
case DW_TAG_lexical_block:
decl_ctx = (clang::DeclContext *)ResolveBlockDIE(die);
try_parsing_type = false;
break;
default:
break;
}
if (decl_ctx == nullptr && try_parsing_type)
{
Type* type = die.GetDWARF()->ResolveType (die);
if (type)
decl_ctx = GetCachedClangDeclContextForDIE (die);
}
if (decl_ctx)
{
LinkDeclContextToDIE (decl_ctx, die);
return decl_ctx;
}
}
return nullptr;
}
clang::BlockDecl *
DWARFASTParserClang::ResolveBlockDIE (const DWARFDIE &die)
{
if (die && die.Tag() == DW_TAG_lexical_block)
{
clang::BlockDecl *decl = llvm::cast_or_null<clang::BlockDecl>(m_die_to_decl_ctx[die.GetDIE()]);
if (!decl)
{
DWARFDIE decl_context_die;
clang::DeclContext *decl_context = GetClangDeclContextContainingDIE(die, &decl_context_die);
decl = m_ast.CreateBlockDeclaration(decl_context);
if (decl)
LinkDeclContextToDIE((clang::DeclContext *)decl, die);
}
return decl;
}
return nullptr;
}
clang::NamespaceDecl *
DWARFASTParserClang::ResolveNamespaceDIE (const DWARFDIE &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.GetDIE()]);
if (namespace_decl)
return namespace_decl;
else
{
const char *namespace_name = die.GetName();
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE (die, nullptr);
namespace_decl = m_ast.GetUniqueNamespaceDeclaration (namespace_name, containing_decl_ctx);
Log *log = nullptr;// (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO));
if (log)
{
SymbolFileDWARF *dwarf = die.GetDWARF();
if (namespace_name)
{
dwarf->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*>(m_ast.getASTContext()),
die.GetID(),
namespace_name,
static_cast<void*>(namespace_decl),
static_cast<void*>(namespace_decl->getOriginalNamespace()));
}
else
{
dwarf->GetObjectFile()->GetModule()->LogMessage (log,
"ASTContext => %p: 0x%8.8" PRIx64 ": DW_TAG_namespace (anonymous) => clang::NamespaceDecl *%p (original = %p)",
static_cast<void*>(m_ast.getASTContext()),
die.GetID(),
static_cast<void*>(namespace_decl),
static_cast<void*>(namespace_decl->getOriginalNamespace()));
}
}
if (namespace_decl)
LinkDeclContextToDIE((clang::DeclContext*)namespace_decl, die);
return namespace_decl;
}
}
return nullptr;
}
clang::DeclContext *
DWARFASTParserClang::GetClangDeclContextContainingDIE (const DWARFDIE &die,
DWARFDIE *decl_ctx_die_copy)
{
SymbolFileDWARF *dwarf = die.GetDWARF();
DWARFDIE decl_ctx_die = dwarf->GetDeclContextDIEContainingDIE (die);
if (decl_ctx_die_copy)
*decl_ctx_die_copy = decl_ctx_die;
if (decl_ctx_die)
{
clang::DeclContext *clang_decl_ctx = GetClangDeclContextForDIE (decl_ctx_die);
if (clang_decl_ctx)
return clang_decl_ctx;
}
return m_ast.GetTranslationUnitDecl();
}
clang::DeclContext *
DWARFASTParserClang::GetCachedClangDeclContextForDIE (const DWARFDIE &die)
{
if (die)
{
DIEToDeclContextMap::iterator pos = m_die_to_decl_ctx.find(die.GetDIE());
if (pos != m_die_to_decl_ctx.end())
return pos->second;
}
return nullptr;
}
void
DWARFASTParserClang::LinkDeclContextToDIE (clang::DeclContext *decl_ctx, const DWARFDIE &die)
{
m_die_to_decl_ctx[die.GetDIE()] = decl_ctx;
// There can be many DIEs for a single decl context
//m_decl_ctx_to_die[decl_ctx].insert(die.GetDIE());
m_decl_ctx_to_die.insert(std::make_pair(decl_ctx, die));
}
bool
DWARFASTParserClang::CopyUniqueClassMethodTypes (const DWARFDIE &src_class_die,
const DWARFDIE &dst_class_die,
lldb_private::Type *class_type,
DWARFDIECollection &failures)
{
if (!class_type || !src_class_die || !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->GetFullCompilerType ();
DWARFDIE src_die;
DWARFDIE dst_die;
UniqueCStringMap<DWARFDIE> src_name_to_die;
UniqueCStringMap<DWARFDIE> dst_name_to_die;
UniqueCStringMap<DWARFDIE> src_name_to_die_artificial;
UniqueCStringMap<DWARFDIE> dst_name_to_die_artificial;
for (src_die = src_class_die.GetFirstChild(); src_die.IsValid(); 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(DW_AT_declaration, 0) == 1)
{
const char *src_name = src_die.GetMangledName ();
if (src_name)
{
ConstString src_const_name(src_name);
if (src_die.GetAttributeValueAsUnsigned(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.IsValid(); 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(DW_AT_declaration, 0) == 1)
{
const char *dst_name = dst_die.GetMangledName ();
if (dst_name)
{
ConstString dst_const_name(dst_name);
if ( dst_die.GetAttributeValueAsUnsigned(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 = nullptr; // (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(),
src_die.GetTagAsCString(),
dst_die.GetOffset(),
dst_die.GetTagAsCString());
fast_path = false;
}
const char *src_name = src_die.GetMangledName ();
const char *dst_name = dst_die.GetMangledName ();
// 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;
}
}
DWARFASTParserClang *src_dwarf_ast_parser = (DWARFASTParserClang *)src_die.GetDWARFParser();
DWARFASTParserClang *dst_dwarf_ast_parser = (DWARFASTParserClang *)dst_die.GetDWARFParser();
// 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_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
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());
dst_dwarf_ast_parser->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 = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
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());
dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 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, DWARFDIE());
if (src_die && (src_die.Tag() == dst_die.Tag()))
{
clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
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());
dst_dwarf_ast_parser->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 = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
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());
dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 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 ();
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, DWARFDIE());
if (dst_die)
{
// Both classes have the artificial types, link them
clang::DeclContext *src_decl_ctx = src_dwarf_ast_parser->m_die_to_decl_ctx[src_die.GetDIE()];
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());
dst_dwarf_ast_parser->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 = dst_die.GetDWARF()->GetDIEToType()[src_die.GetDIE()];
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());
dst_die.GetDWARF()->GetDIEToType()[dst_die.GetDIE()] = 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);
}
bool
DWARFASTParserClang::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)
{
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();
}
return success;
}
Reference in a new issue Copy permalink