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[lldb/DWARF] Remove parsing recursion when searching for definition DIEs (#96484)

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If ParseStructureLikeDIE (or ParseEnum) encountered a declaration DIE,
it would call FindDefinitionTypeForDIE. This returned a fully formed
type, which it achieved by recursing back into ParseStructureLikeDIE
with the definition DIE.

This obscured the control flow and caused us to repeat some work (e.g.
the UniqueDWARFASTTypeMap lookup), but it mostly worked until we tried
to delay the definition search in #90663. After this patch, the two
ParseStructureLikeDIE calls were no longer recursive, but rather the
second call happened as a part of the CompleteType() call. This opened
the door to inconsistencies, as the second ParseStructureLikeDIE call
was not aware it was called to process a definition die for an existing
type.

To make that possible, this patch removes the recusive type resolution
from this function, and leaves just the "find definition die"
functionality. After finding the definition DIE, we just go back to the
original ParseStructureLikeDIE call, and have it finish the parsing
process with the new DIE.

While this patch is motivated by the work on delaying the definition
searching, I believe it is also useful on its own.
This commit is contained in:
Pavel Labath 2024-06-25 10:52:11 +02:00 committed by GitHub
parent 2d84e0ffef
commit 8395f9cecd
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
7 changed files with 220 additions and 218 deletions
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227
lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
View File

@ -39,10 +39,12 @@
#include "lldb/Utility/StreamString.h"
#include "clang/AST/CXXInheritance.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Type.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Demangle/Demangle.h"
#include <map>
@ -835,54 +837,50 @@ DWARFASTParserClang::GetDIEClassTemplateParams(const DWARFDIE &die) {
}
TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc,
const DWARFDIE &die,
const DWARFDIE &decl_die,
ParsedDWARFTypeAttributes &attrs) {
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
SymbolFileDWARF *dwarf = die.GetDWARF();
const dw_tag_t tag = die.Tag();
TypeSP type_sp;
SymbolFileDWARF *dwarf = decl_die.GetDWARF();
const dw_tag_t tag = decl_die.Tag();
DWARFDIE def_die;
if (attrs.is_forward_declaration) {
type_sp = ParseTypeFromClangModule(sc, die, log);
if (type_sp)
if (TypeSP type_sp = ParseTypeFromClangModule(sc, decl_die, log))
return type_sp;
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die);
def_die = dwarf->FindDefinitionDIE(decl_die);
if (!type_sp) {
if (!def_die) {
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);
def_die = debug_map_symfile->FindDefinitionDIE(decl_die);
}
}
if (type_sp) {
if (log) {
dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF({0:p}) - {1:x16}}: {2} ({3}) type \"{4}\" is a "
"forward declaration, complete type is {5:x8}",
static_cast<void *>(this), die.GetOffset(),
DW_TAG_value_to_name(tag), tag, attrs.name.GetCString(),
type_sp->GetID());
}
// We found a real definition for this type elsewhere so must link its
// DeclContext to this die.
if (clang::DeclContext *defn_decl_ctx =
GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())))
LinkDeclContextToDIE(defn_decl_ctx, die);
return type_sp;
if (log) {
dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF({0:p}) - {1:x16}}: {2} ({3}) type \"{4}\" is a "
"forward declaration, complete DIE is {5}",
static_cast<void *>(this), decl_die.GetID(), DW_TAG_value_to_name(tag),
tag, attrs.name.GetCString(),
def_die ? llvm::utohexstr(def_die.GetID()) : "not found");
}
}
DEBUG_PRINTF("0x%8.8" PRIx64 ": %s (\"%s\")\n", die.GetID(),
DW_TAG_value_to_name(tag), type_name_cstr);
if (def_die) {
attrs = ParsedDWARFTypeAttributes(def_die);
} else {
// No definition found. Proceed with the declaration die. We can use it to
// create a forward-declared type.
def_die = decl_die;
}
CompilerType enumerator_clang_type;
if (attrs.type.IsValid()) {
Type *enumerator_type = dwarf->ResolveTypeUID(attrs.type.Reference(), true);
Type *enumerator_type =
dwarf->ResolveTypeUID(attrs.type.Reference(), true);
if (enumerator_type)
enumerator_clang_type = enumerator_type->GetFullCompilerType();
}
@ -897,24 +895,31 @@ TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc,
}
CompilerType clang_type = m_ast.CreateEnumerationType(
attrs.name.GetStringRef(), GetClangDeclContextContainingDIE(die, nullptr),
GetOwningClangModule(die), attrs.decl, enumerator_clang_type,
attrs.name.GetStringRef(), GetClangDeclContextContainingDIE(def_die, nullptr),
GetOwningClangModule(def_die), attrs.decl, enumerator_clang_type,
attrs.is_scoped_enum);
LinkDeclContextToDIE(TypeSystemClang::GetDeclContextForType(clang_type), die);
type_sp =
dwarf->MakeType(die.GetID(), attrs.name, attrs.byte_size, nullptr,
TypeSP type_sp =
dwarf->MakeType(def_die.GetID(), attrs.name, attrs.byte_size, nullptr,
attrs.type.Reference().GetID(), Type::eEncodingIsUID,
&attrs.decl, clang_type, Type::ResolveState::Forward,
TypePayloadClang(GetOwningClangModule(die)));
TypePayloadClang(GetOwningClangModule(def_die)));
clang::DeclContext *type_decl_ctx =
TypeSystemClang::GetDeclContextForType(clang_type);
LinkDeclContextToDIE(type_decl_ctx, decl_die);
if (decl_die != def_die) {
LinkDeclContextToDIE(type_decl_ctx, def_die);
dwarf->GetDIEToType()[def_die.GetDIE()] = type_sp.get();
// Declaration DIE is inserted into the type map in ParseTypeFromDWARF
}
if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) {
if (die.HasChildren()) {
if (def_die.HasChildren()) {
bool is_signed = false;
enumerator_clang_type.IsIntegerType(is_signed);
ParseChildEnumerators(clang_type, is_signed,
type_sp->GetByteSize(nullptr).value_or(0), die);
type_sp->GetByteSize(nullptr).value_or(0), def_die);
}
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
} else {
@ -922,7 +927,7 @@ TypeSP DWARFASTParserClang::ParseEnum(const SymbolContext &sc,
"DWARF DIE at {0:x16} named \"{1}\" was not able to start its "
"definition.\nPlease file a bug and attach the file at the "
"start of this error message",
die.GetOffset(), attrs.name.GetCString());
def_die.GetOffset(), attrs.name.GetCString());
}
return type_sp;
}
@ -1635,13 +1640,12 @@ DWARFASTParserClang::GetCPlusPlusQualifiedName(const DWARFDIE &die) {
TypeSP
DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
const DWARFDIE &die,
const DWARFDIE &decl_die,
ParsedDWARFTypeAttributes &attrs) {
TypeSP type_sp;
CompilerType clang_type;
const dw_tag_t tag = die.Tag();
SymbolFileDWARF *dwarf = die.GetDWARF();
LanguageType cu_language = SymbolFileDWARF::GetLanguage(*die.GetCU());
const dw_tag_t tag = decl_die.Tag();
SymbolFileDWARF *dwarf = decl_die.GetDWARF();
LanguageType cu_language = SymbolFileDWARF::GetLanguage(*decl_die.GetCU());
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
// UniqueDWARFASTType is large, so don't create a local variables on the
@ -1658,19 +1662,19 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
// For C++, we rely solely upon the one definition rule that says
// only one thing can exist at a given decl context. We ignore the
// file and line that things are declared on.
std::string qualified_name = GetCPlusPlusQualifiedName(die);
std::string qualified_name = GetCPlusPlusQualifiedName(decl_die);
if (!qualified_name.empty())
unique_typename = ConstString(qualified_name);
unique_decl.Clear();
}
if (dwarf->GetUniqueDWARFASTTypeMap().Find(
unique_typename, die, unique_decl, attrs.byte_size.value_or(-1),
*unique_ast_entry_up)) {
type_sp = unique_ast_entry_up->m_type_sp;
if (type_sp) {
unique_typename, decl_die, unique_decl,
attrs.byte_size.value_or(-1), *unique_ast_entry_up)) {
if (TypeSP type_sp = unique_ast_entry_up->m_type_sp) {
LinkDeclContextToDIE(
GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die), die);
GetCachedClangDeclContextForDIE(unique_ast_entry_up->m_die),
decl_die);
return type_sp;
}
}
@ -1693,7 +1697,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
}
if (attrs.byte_size && *attrs.byte_size == 0 && attrs.name &&
!die.HasChildren() && cu_language == eLanguageTypeObjC) {
!decl_die.HasChildren() && cu_language == 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]
@ -1710,14 +1714,14 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
if (attrs.class_language == eLanguageTypeObjC ||
attrs.class_language == eLanguageTypeObjC_plus_plus) {
if (!attrs.is_complete_objc_class &&
die.Supports_DW_AT_APPLE_objc_complete_type()) {
decl_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, attrs.name, true);
TypeSP type_sp =
dwarf->FindCompleteObjCDefinitionTypeForDIE(decl_die, attrs.name, true);
if (!type_sp) {
SymbolFileDWARFDebugMap *debug_map_symfile =
@ -1726,7 +1730,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
// 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, attrs.name, true);
decl_die, attrs.name, true);
}
}
@ -1736,7 +1740,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
log,
"SymbolFileDWARF({0:p}) - {1:x16}: {2} ({3}) type \"{4}\" is an "
"incomplete objc type, complete type is {5:x8}",
static_cast<void *>(this), die.GetOffset(),
static_cast<void *>(this), decl_die.GetOffset(),
DW_TAG_value_to_name(tag), tag, attrs.name.GetCString(),
type_sp->GetID());
}
@ -1745,6 +1749,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
}
}
DWARFDIE def_die;
if (attrs.is_forward_declaration) {
Progress progress(llvm::formatv(
"Parsing type in {0}: '{1}'",
@ -1761,81 +1766,80 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
log,
"SymbolFileDWARF({0:p}) - {1:x16}: {2} ({3}) type \"{4}\" is a "
"forward declaration, trying to find complete type",
static_cast<void *>(this), die.GetOffset(), DW_TAG_value_to_name(tag),
tag, attrs.name.GetCString());
static_cast<void *>(this), decl_die.GetID(),
DW_TAG_value_to_name(tag), tag, attrs.name.GetCString());
}
// See if the type comes from a Clang module and if so, track down
// that type.
type_sp = ParseTypeFromClangModule(sc, die, log);
if (type_sp)
if (TypeSP type_sp = ParseTypeFromClangModule(sc, decl_die, log))
return type_sp;
// type_sp = FindDefinitionTypeForDIE (dwarf_cu, die,
// type_name_const_str);
type_sp = dwarf->FindDefinitionTypeForDWARFDeclContext(die);
def_die = dwarf->FindDefinitionDIE(decl_die);
if (!type_sp) {
if (!def_die) {
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);
def_die = debug_map_symfile->FindDefinitionDIE(decl_die);
}
}
if (type_sp) {
if (log) {
dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF({0:p}) - {1:x16}: {2} ({3}) type \"{4}\" is a "
"forward declaration, complete type is {5:x8}",
static_cast<void *>(this), die.GetOffset(),
DW_TAG_value_to_name(tag), tag, attrs.name.GetCString(),
type_sp->GetID());
}
// We found a real definition for this type elsewhere so must link its
// DeclContext to this die.
if (clang::DeclContext *defn_decl_ctx =
GetCachedClangDeclContextForDIE(dwarf->GetDIE(type_sp->GetID())))
LinkDeclContextToDIE(defn_decl_ctx, die);
return type_sp;
if (log) {
dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF({0:p}) - {1:x16}: {2} ({3}) type \"{4}\" is a "
"forward declaration, complete type is {5}",
static_cast<void *>(this), def_die.GetID(), DW_TAG_value_to_name(tag),
tag, attrs.name.GetCString(),
def_die ? llvm::utohexstr(def_die.GetID()) : "not found");
}
}
if (def_die) {
attrs = ParsedDWARFTypeAttributes(def_die);
} else {
// No definition found. Proceed with the declaration die. We can use it to
// create a forward-declared type.
def_die = decl_die;
}
assert(tag_decl_kind != -1);
UNUSED_IF_ASSERT_DISABLED(tag_decl_kind);
bool clang_type_was_created = false;
clang::DeclContext *decl_ctx = GetClangDeclContextContainingDIE(die, nullptr);
clang::DeclContext *containing_decl_ctx = GetClangDeclContextContainingDIE(def_die, nullptr);
PrepareContextToReceiveMembers(m_ast, GetClangASTImporter(), decl_ctx, die,
PrepareContextToReceiveMembers(m_ast, GetClangASTImporter(),
containing_decl_ctx, def_die,
attrs.name.GetCString());
if (attrs.accessibility == eAccessNone && decl_ctx) {
if (attrs.accessibility == eAccessNone && containing_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();
const clang::Decl::Kind containing_decl_kind =
containing_decl_ctx->getDeclKind();
if (DeclKindIsCXXClass(containing_decl_kind))
attrs.accessibility = default_accessibility;
}
ClangASTMetadata metadata;
metadata.SetUserID(die.GetID());
metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(die));
metadata.SetUserID(def_die.GetID());
metadata.SetIsDynamicCXXType(dwarf->ClassOrStructIsVirtual(def_die));
TypeSystemClang::TemplateParameterInfos template_param_infos;
if (ParseTemplateParameterInfos(die, template_param_infos)) {
if (ParseTemplateParameterInfos(def_die, template_param_infos)) {
clang::ClassTemplateDecl *class_template_decl =
m_ast.ParseClassTemplateDecl(
decl_ctx, GetOwningClangModule(die), attrs.accessibility,
attrs.name.GetCString(), tag_decl_kind, template_param_infos);
containing_decl_ctx, GetOwningClangModule(def_die),
attrs.accessibility, attrs.name.GetCString(), tag_decl_kind,
template_param_infos);
if (!class_template_decl) {
if (log) {
dwarf->GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF({0:p}) - {1:x16}: {2} ({3}) type \"{4}\" "
"clang::ClassTemplateDecl failed to return a decl.",
static_cast<void *>(this), die.GetOffset(),
static_cast<void *>(this), def_die.GetID(),
DW_TAG_value_to_name(tag), tag, attrs.name.GetCString());
}
return TypeSP();
@ -1843,8 +1847,8 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
clang::ClassTemplateSpecializationDecl *class_specialization_decl =
m_ast.CreateClassTemplateSpecializationDecl(
decl_ctx, GetOwningClangModule(die), class_template_decl,
tag_decl_kind, template_param_infos);
containing_decl_ctx, GetOwningClangModule(def_die),
class_template_decl, tag_decl_kind, template_param_infos);
clang_type =
m_ast.CreateClassTemplateSpecializationType(class_specialization_decl);
clang_type_was_created = true;
@ -1856,26 +1860,34 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
if (!clang_type_was_created) {
clang_type_was_created = true;
clang_type = m_ast.CreateRecordType(
decl_ctx, GetOwningClangModule(die), attrs.accessibility,
containing_decl_ctx, GetOwningClangModule(def_die), attrs.accessibility,
attrs.name.GetCString(), tag_decl_kind, attrs.class_language, &metadata,
attrs.exports_symbols);
}
// 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 = dwarf->MakeType(
die.GetID(), attrs.name, attrs.byte_size, nullptr, LLDB_INVALID_UID,
TypeSP type_sp = dwarf->MakeType(
def_die.GetID(), attrs.name, attrs.byte_size, nullptr, LLDB_INVALID_UID,
Type::eEncodingIsUID, &attrs.decl, clang_type,
Type::ResolveState::Forward,
TypePayloadClang(OptionalClangModuleID(), attrs.is_complete_objc_class));
// 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.
clang::DeclContext *type_decl_ctx =
TypeSystemClang::GetDeclContextForType(clang_type);
LinkDeclContextToDIE(type_decl_ctx, decl_die);
if (decl_die != def_die) {
LinkDeclContextToDIE(type_decl_ctx, def_die);
dwarf->GetDIEToType()[def_die.GetDIE()] = type_sp.get();
// Declaration DIE is inserted into the type map in ParseTypeFromDWARF
}
// 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_up->m_type_sp = type_sp;
unique_ast_entry_up->m_die = die;
unique_ast_entry_up->m_die = def_die;
unique_ast_entry_up->m_declaration = unique_decl;
unique_ast_entry_up->m_byte_size = attrs.byte_size.value_or(0);
dwarf->GetUniqueDWARFASTTypeMap().Insert(unique_typename,
@ -1886,18 +1898,17 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
// 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()) {
if (!def_die.HasChildren()) {
// No children for this struct/union/class, lets finish it
if (TypeSystemClang::StartTagDeclarationDefinition(clang_type)) {
TypeSystemClang::CompleteTagDeclarationDefinition(clang_type);
} else {
dwarf->GetObjectFile()->GetModule()->ReportError(
"DWARF DIE at {0:x16} named \"{1}\" was not able to start "
"its "
"DWARF DIE {0:x16} named \"{1}\" was not able to start its "
"definition.\nPlease file a bug and attach the file at the "
"start of this error message",
die.GetOffset(), attrs.name.GetCString());
def_die.GetID(), attrs.name.GetCString());
}
// Setting authority byte size and alignment for empty structures.
@ -1945,7 +1956,7 @@ DWARFASTParserClang::ParseStructureLikeDIE(const SymbolContext &sc,
// binaries.
dwarf->GetForwardDeclCompilerTypeToDIE().try_emplace(
ClangUtil::RemoveFastQualifiers(clang_type).GetOpaqueQualType(),
*die.GetDIERef());
*def_die.GetDIERef());
m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
}
}

187
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
View File

@ -3045,118 +3045,113 @@ TypeSP SymbolFileDWARF::FindCompleteObjCDefinitionTypeForDIE(
return type_sp;
}
TypeSP
SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die) {
TypeSP type_sp;
DWARFDIE
SymbolFileDWARF::FindDefinitionDIE(const DWARFDIE &die) {
if (!die.GetName())
return {};
if (die.GetName()) {
const dw_tag_t tag = die.Tag();
const dw_tag_t tag = die.Tag();
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
if (log) {
GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF::FindDefinitionTypeForDWARFDeclContext(tag={0} "
"({1}), name='{2}')",
DW_TAG_value_to_name(tag), tag, die.GetName());
Log *log = GetLog(DWARFLog::TypeCompletion | DWARFLog::Lookups);
if (log) {
GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF::FindDefinitionDIE(tag={0} "
"({1}), name='{2}')",
DW_TAG_value_to_name(tag), tag, die.GetName());
}
// Get the type system that we are looking to find a type for. We will
// use this to ensure any matches we find are in a language that this
// type system supports
const LanguageType language = GetLanguage(*die.GetCU());
TypeSystemSP type_system = nullptr;
if (language != eLanguageTypeUnknown) {
auto type_system_or_err = GetTypeSystemForLanguage(language);
if (auto err = type_system_or_err.takeError()) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Symbols), std::move(err),
"Cannot get TypeSystem for language {1}: {0}",
Language::GetNameForLanguageType(language));
} else {
type_system = *type_system_or_err;
}
}
// Get the type system that we are looking to find a type for. We will
// use this to ensure any matches we find are in a language that this
// type system supports
const LanguageType language = GetLanguage(*die.GetCU());
TypeSystemSP type_system = nullptr;
if (language != eLanguageTypeUnknown) {
auto type_system_or_err = GetTypeSystemForLanguage(language);
if (auto err = type_system_or_err.takeError()) {
LLDB_LOG_ERROR(GetLog(LLDBLog::Symbols), std::move(err),
"Cannot get TypeSystem for language {1}: {0}",
Language::GetNameForLanguageType(language));
} else {
type_system = *type_system_or_err;
}
}
// See comments below about -gsimple-template-names for why we attempt to
// compute missing template parameter names.
std::vector<std::string> template_params;
DWARFDeclContext die_dwarf_decl_ctx;
DWARFASTParser *dwarf_ast =
type_system ? type_system->GetDWARFParser() : nullptr;
for (DWARFDIE ctx_die = die; ctx_die && !isUnitType(ctx_die.Tag());
ctx_die = ctx_die.GetParentDeclContextDIE()) {
die_dwarf_decl_ctx.AppendDeclContext(ctx_die.Tag(), ctx_die.GetName());
template_params.push_back(
(ctx_die.IsStructUnionOrClass() && dwarf_ast)
? dwarf_ast->GetDIEClassTemplateParams(ctx_die)
: "");
}
const bool any_template_params = llvm::any_of(
template_params, [](llvm::StringRef p) { return !p.empty(); });
// See comments below about -gsimple-template-names for why we attempt to
// compute missing template parameter names.
std::vector<std::string> template_params;
DWARFDeclContext die_dwarf_decl_ctx;
DWARFASTParser *dwarf_ast = type_system ? type_system->GetDWARFParser() : nullptr;
for (DWARFDIE ctx_die = die; ctx_die && !isUnitType(ctx_die.Tag());
ctx_die = ctx_die.GetParentDeclContextDIE()) {
die_dwarf_decl_ctx.AppendDeclContext(ctx_die.Tag(), ctx_die.GetName());
template_params.push_back(
(ctx_die.IsStructUnionOrClass() && dwarf_ast)
? dwarf_ast->GetDIEClassTemplateParams(ctx_die)
: "");
}
const bool any_template_params = llvm::any_of(
template_params, [](llvm::StringRef p) { return !p.empty(); });
auto die_matches = [&](DWARFDIE type_die) {
// Resolve the type if both have the same tag or {class, struct} tags.
const bool tag_matches =
type_die.Tag() == tag ||
(IsStructOrClassTag(type_die.Tag()) && IsStructOrClassTag(tag));
if (!tag_matches)
return false;
if (any_template_params) {
size_t pos = 0;
for (DWARFDIE ctx_die = type_die;
ctx_die && !isUnitType(ctx_die.Tag()) &&
pos < template_params.size();
ctx_die = ctx_die.GetParentDeclContextDIE(), ++pos) {
if (template_params[pos].empty())
continue;
if (template_params[pos] != dwarf_ast->GetDIEClassTemplateParams(ctx_die))
return false;
}
if (pos != template_params.size())
auto die_matches = [&](DWARFDIE type_die) {
// Resolve the type if both have the same tag or {class, struct} tags.
const bool tag_matches =
type_die.Tag() == tag ||
(IsStructOrClassTag(type_die.Tag()) && IsStructOrClassTag(tag));
if (!tag_matches)
return false;
if (any_template_params) {
size_t pos = 0;
for (DWARFDIE ctx_die = type_die; ctx_die && !isUnitType(ctx_die.Tag()) &&
pos < template_params.size();
ctx_die = ctx_die.GetParentDeclContextDIE(), ++pos) {
if (template_params[pos].empty())
continue;
if (template_params[pos] !=
dwarf_ast->GetDIEClassTemplateParams(ctx_die))
return false;
}
if (pos != template_params.size())
return false;
}
return true;
};
DWARFDIE result;
m_index->GetFullyQualifiedType(die_dwarf_decl_ctx, [&](DWARFDIE type_die) {
// Make sure type_die's language matches the type system we are
// looking for. We don't want to find a "Foo" type from Java if we
// are looking for a "Foo" type for C, C++, ObjC, or ObjC++.
if (type_system &&
!type_system->SupportsLanguage(GetLanguage(*type_die.GetCU())))
return true;
};
m_index->GetFullyQualifiedType(die_dwarf_decl_ctx, [&](DWARFDIE type_die) {
// Make sure type_die's language matches the type system we are
// looking for. We don't want to find a "Foo" type from Java if we
// are looking for a "Foo" type for C, C++, ObjC, or ObjC++.
if (type_system &&
!type_system->SupportsLanguage(GetLanguage(*type_die.GetCU())))
return true;
if (!die_matches(type_die)) {
if (log) {
GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF::"
"FindDefinitionTypeForDWARFDeclContext(tag={0} ({1}), "
"name='{2}') ignoring die={3:x16} ({4})",
DW_TAG_value_to_name(tag), tag, die.GetName(),
type_die.GetOffset(), type_die.GetName());
}
return true;
}
if (!die_matches(type_die)) {
if (log) {
DWARFDeclContext type_dwarf_decl_ctx = type_die.GetDWARFDeclContext();
GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF::"
"FindDefinitionTypeForDWARFDeclContext(tag={0} ({1}), name='{2}') "
"trying die={3:x16} ({4})",
"SymbolFileDWARF::FindDefinitionDIE(tag={0} ({1}), "
"name='{2}') ignoring die={3:x16} ({4})",
DW_TAG_value_to_name(tag), tag, die.GetName(), type_die.GetOffset(),
type_dwarf_decl_ctx.GetQualifiedName());
type_die.GetName());
}
return true;
}
Type *resolved_type = ResolveType(type_die, false);
if (!resolved_type || resolved_type == DIE_IS_BEING_PARSED)
return true;
if (log) {
DWARFDeclContext type_dwarf_decl_ctx = type_die.GetDWARFDeclContext();
GetObjectFile()->GetModule()->LogMessage(
log,
"SymbolFileDWARF::FindDefinitionTypeDIE(tag={0} ({1}), name='{2}') "
"trying die={3:x16} ({4})",
DW_TAG_value_to_name(tag), tag, die.GetName(), type_die.GetOffset(),
type_dwarf_decl_ctx.GetQualifiedName());
}
type_sp = resolved_type->shared_from_this();
return false;
});
}
return type_sp;
result = type_die;
return false;
});
return result;
}
TypeSP SymbolFileDWARF::ParseType(const SymbolContext &sc, const DWARFDIE &die,

3
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
View File

@ -360,8 +360,7 @@ public:
SymbolFileDWARFDebugMap *GetDebugMapSymfile();
virtual lldb::TypeSP
FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die);
virtual DWARFDIE FindDefinitionDIE(const DWARFDIE &die);
virtual lldb::TypeSP FindCompleteObjCDefinitionTypeForDIE(
const DWARFDIE &die, ConstString type_name, bool must_be_implementation);

11
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
View File

@ -1147,14 +1147,13 @@ SymbolFileDWARFDebugMap::ParseCallEdgesInFunction(
return {};
}
TypeSP SymbolFileDWARFDebugMap::FindDefinitionTypeForDWARFDeclContext(
const DWARFDIE &die) {
TypeSP type_sp;
DWARFDIE SymbolFileDWARFDebugMap::FindDefinitionDIE(const DWARFDIE &die) {
DWARFDIE result;
ForEachSymbolFile([&](SymbolFileDWARF *oso_dwarf) {
type_sp = oso_dwarf->FindDefinitionTypeForDWARFDeclContext(die);
return type_sp ? IterationAction::Stop : IterationAction::Continue;
result = oso_dwarf->FindDefinitionDIE(die);
return result ? IterationAction::Stop : IterationAction::Continue;
});
return type_sp;
return result;
}
bool SymbolFileDWARFDebugMap::Supports_DW_AT_APPLE_objc_complete_type(

2
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.h
View File

@ -277,7 +277,7 @@ protected:
CompileUnitInfo *GetCompileUnitInfo(SymbolFileDWARF *oso_dwarf);
lldb::TypeSP FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die);
DWARFDIE FindDefinitionDIE(const DWARFDIE &die);
bool Supports_DW_AT_APPLE_objc_complete_type(SymbolFileDWARF *skip_dwarf_oso);

5
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
View File

@ -125,9 +125,8 @@ UniqueDWARFASTTypeMap &SymbolFileDWARFDwo::GetUniqueDWARFASTTypeMap() {
return GetBaseSymbolFile().GetUniqueDWARFASTTypeMap();
}
lldb::TypeSP
SymbolFileDWARFDwo::FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die) {
return GetBaseSymbolFile().FindDefinitionTypeForDWARFDeclContext(die);
DWARFDIE SymbolFileDWARFDwo::FindDefinitionDIE(const DWARFDIE &die) {
return GetBaseSymbolFile().FindDefinitionDIE(die);
}
lldb::TypeSP SymbolFileDWARFDwo::FindCompleteObjCDefinitionTypeForDIE(

3
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h
View File

@ -78,8 +78,7 @@ protected:
UniqueDWARFASTTypeMap &GetUniqueDWARFASTTypeMap() override;
lldb::TypeSP
FindDefinitionTypeForDWARFDeclContext(const DWARFDIE &die) override;
DWARFDIE FindDefinitionDIE(const DWARFDIE &die) override;
lldb::TypeSP
FindCompleteObjCDefinitionTypeForDIE(const DWARFDIE &die,