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#include "UdtRecordCompleter.h"
#include "PdbAstBuilder.h"
#include "PdbIndex.h"
#include "PdbSymUid.h"
#include "PdbUtil.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/ClangASTImporter.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Utility/LLDBAssert.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-forward.h"
#include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
#include "llvm/DebugInfo/CodeView/TypeIndex.h"
#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
#include "llvm/DebugInfo/PDB/PDBTypes.h"
using namespace llvm::codeview;
using namespace llvm::pdb;
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::npdb;
using Error = llvm::Error;
UdtRecordCompleter::UdtRecordCompleter(PdbTypeSymId id,
CompilerType &derived_ct,
clang::TagDecl &tag_decl,
PdbAstBuilder &ast_builder,
TpiStream &tpi)
: m_id(id), m_derived_ct(derived_ct), m_tag_decl(tag_decl),
m_ast_builder(ast_builder), m_tpi(tpi) {
CVType cvt = m_tpi.getType(m_id.index);
switch (cvt.kind()) {
case LF_ENUM:
llvm::cantFail(TypeDeserializer::deserializeAs<EnumRecord>(cvt, m_cvr.er));
break;
case LF_UNION:
llvm::cantFail(TypeDeserializer::deserializeAs<UnionRecord>(cvt, m_cvr.ur));
break;
case LF_CLASS:
case LF_STRUCTURE:
llvm::cantFail(TypeDeserializer::deserializeAs<ClassRecord>(cvt, m_cvr.cr));
break;
default:
llvm_unreachable("unreachable!");
}
}
clang::QualType UdtRecordCompleter::AddBaseClassForTypeIndex(
llvm::codeview::TypeIndex ti, llvm::codeview::MemberAccess access,
llvm::Optional<uint64_t> vtable_idx) {
PdbTypeSymId type_id(ti);
clang::QualType qt = m_ast_builder.GetOrCreateType(type_id);
CVType udt_cvt = m_tpi.getType(ti);
std::unique_ptr<clang::CXXBaseSpecifier> base_spec =
m_ast_builder.clang().CreateBaseClassSpecifier(
qt.getAsOpaquePtr(), TranslateMemberAccess(access),
vtable_idx.hasValue(), udt_cvt.kind() == LF_CLASS);
lldbassert(base_spec);
m_bases.push_back(
std::make_pair(vtable_idx.getValueOr(0), std::move(base_spec)));
return qt;
}
void UdtRecordCompleter::AddMethod(llvm::StringRef name, TypeIndex type_idx,
MemberAccess access, MethodOptions options,
MemberAttributes attrs) {
clang::QualType method_qt =
m_ast_builder.GetOrCreateType(PdbTypeSymId(type_idx));
m_ast_builder.CompleteType(method_qt);
lldb::AccessType access_type = TranslateMemberAccess(access);
bool is_artificial = (options & MethodOptions::CompilerGenerated) ==
MethodOptions::CompilerGenerated;
m_ast_builder.clang().AddMethodToCXXRecordType(
m_derived_ct.GetOpaqueQualType(), name.data(), nullptr,
m_ast_builder.ToCompilerType(method_qt), access_type, attrs.isVirtual(),
attrs.isStatic(), false, false, false, is_artificial);
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
BaseClassRecord &base) {
clang::QualType base_qt =
AddBaseClassForTypeIndex(base.Type, base.getAccess());
auto decl =
m_ast_builder.clang().GetAsCXXRecordDecl(base_qt.getAsOpaquePtr());
lldbassert(decl);
auto offset = clang::CharUnits::fromQuantity(base.getBaseOffset());
m_layout.base_offsets.insert(std::make_pair(decl, offset));
return llvm::Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
VirtualBaseClassRecord &base) {
AddBaseClassForTypeIndex(base.BaseType, base.getAccess(), base.VTableIndex);
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
ListContinuationRecord &cont) {
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
VFPtrRecord &vfptr) {
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(
CVMemberRecord &cvr, StaticDataMemberRecord &static_data_member) {
clang::QualType member_type =
m_ast_builder.GetOrCreateType(PdbTypeSymId(static_data_member.Type));
m_ast_builder.CompleteType(member_type);
CompilerType member_ct = m_ast_builder.ToCompilerType(member_type);
lldb::AccessType access =
TranslateMemberAccess(static_data_member.getAccess());
ClangASTContext::AddVariableToRecordType(
m_derived_ct, static_data_member.Name, member_ct, access);
// FIXME: Add a PdbSymUid namespace for field list members and update
// the m_uid_to_decl map with this decl.
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
NestedTypeRecord &nested) {
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
DataMemberRecord &data_member) {
uint64_t offset = data_member.FieldOffset * 8;
uint32_t bitfield_width = 0;
TypeIndex ti(data_member.Type);
if (!ti.isSimple()) {
CVType cvt = m_tpi.getType(ti);
if (cvt.kind() == LF_BITFIELD) {
BitFieldRecord bfr;
llvm::cantFail(TypeDeserializer::deserializeAs<BitFieldRecord>(cvt, bfr));
offset += bfr.BitOffset;
bitfield_width = bfr.BitSize;
ti = bfr.Type;
}
}
clang::QualType member_qt = m_ast_builder.GetOrCreateType(PdbTypeSymId(ti));
m_ast_builder.CompleteType(member_qt);
lldb::AccessType access = TranslateMemberAccess(data_member.getAccess());
clang::FieldDecl *decl = ClangASTContext::AddFieldToRecordType(
m_derived_ct, data_member.Name, m_ast_builder.ToCompilerType(member_qt),
access, bitfield_width);
// FIXME: Add a PdbSymUid namespace for field list members and update
// the m_uid_to_decl map with this decl.
m_layout.field_offsets.insert(std::make_pair(decl, offset));
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
OneMethodRecord &one_method) {
AddMethod(one_method.Name, one_method.Type, one_method.getAccess(),
one_method.getOptions(), one_method.Attrs);
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
OverloadedMethodRecord &overloaded) {
TypeIndex method_list_idx = overloaded.MethodList;
CVType method_list_type = m_tpi.getType(method_list_idx);
assert(method_list_type.kind() == LF_METHODLIST);
MethodOverloadListRecord method_list;
llvm::cantFail(TypeDeserializer::deserializeAs<MethodOverloadListRecord>(
method_list_type, method_list));
for (const OneMethodRecord &method : method_list.Methods)
AddMethod(overloaded.Name, method.Type, method.getAccess(),
method.getOptions(), method.Attrs);
return Error::success();
}
Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
EnumeratorRecord &enumerator) {
Declaration decl;
llvm::StringRef name = DropNameScope(enumerator.getName());
m_ast_builder.clang().AddEnumerationValueToEnumerationType(
m_derived_ct, decl, name.str().c_str(), enumerator.Value);
return Error::success();
}
void UdtRecordCompleter::complete() {
// Ensure the correct order for virtual bases.
std::stable_sort(m_bases.begin(), m_bases.end(),
[](const IndexedBase &lhs, const IndexedBase &rhs) {
return lhs.first < rhs.first;
});
std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases;
bases.reserve(m_bases.size());
for (auto &ib : m_bases)
bases.push_back(std::move(ib.second));
ClangASTContext &clang = m_ast_builder.clang();
clang.TransferBaseClasses(m_derived_ct.GetOpaqueQualType(), std::move(bases));
clang.AddMethodOverridesForCXXRecordType(m_derived_ct.GetOpaqueQualType());
ClangASTContext::BuildIndirectFields(m_derived_ct);
ClangASTContext::CompleteTagDeclarationDefinition(m_derived_ct);
if (auto *record_decl = llvm::dyn_cast<clang::CXXRecordDecl>(&m_tag_decl)) {
m_ast_builder.importer().InsertRecordDecl(record_decl, m_layout);
}
}
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