301 lines
11 KiB
C++
301 lines
11 KiB
C++
#include "UdtRecordCompleter.h"
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#include "PdbAstBuilder.h"
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#include "PdbIndex.h"
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#include "PdbSymUid.h"
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#include "PdbUtil.h"
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#include "Plugins/ExpressionParser/Clang/ClangASTImporter.h"
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#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
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#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Utility/LLDBAssert.h"
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#include "lldb/lldb-enumerations.h"
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#include "lldb/lldb-forward.h"
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#include "llvm/DebugInfo/CodeView/SymbolDeserializer.h"
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#include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
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#include "llvm/DebugInfo/CodeView/TypeIndex.h"
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#include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
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#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
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#include "llvm/DebugInfo/PDB/PDBTypes.h"
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using namespace llvm::codeview;
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using namespace llvm::pdb;
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::npdb;
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using Error = llvm::Error;
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UdtRecordCompleter::UdtRecordCompleter(PdbTypeSymId id,
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CompilerType &derived_ct,
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clang::TagDecl &tag_decl,
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PdbAstBuilder &ast_builder,
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PdbIndex &index)
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: m_id(id), m_derived_ct(derived_ct), m_tag_decl(tag_decl),
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m_ast_builder(ast_builder), m_index(index) {
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CVType cvt = m_index.tpi().getType(m_id.index);
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switch (cvt.kind()) {
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case LF_ENUM:
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llvm::cantFail(TypeDeserializer::deserializeAs<EnumRecord>(cvt, m_cvr.er));
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break;
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case LF_UNION:
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llvm::cantFail(TypeDeserializer::deserializeAs<UnionRecord>(cvt, m_cvr.ur));
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break;
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case LF_CLASS:
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case LF_STRUCTURE:
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llvm::cantFail(TypeDeserializer::deserializeAs<ClassRecord>(cvt, m_cvr.cr));
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break;
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default:
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llvm_unreachable("unreachable!");
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}
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}
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clang::QualType UdtRecordCompleter::AddBaseClassForTypeIndex(
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llvm::codeview::TypeIndex ti, llvm::codeview::MemberAccess access,
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llvm::Optional<uint64_t> vtable_idx) {
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PdbTypeSymId type_id(ti);
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clang::QualType qt = m_ast_builder.GetOrCreateType(type_id);
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CVType udt_cvt = m_index.tpi().getType(ti);
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std::unique_ptr<clang::CXXBaseSpecifier> base_spec =
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m_ast_builder.clang().CreateBaseClassSpecifier(
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qt.getAsOpaquePtr(), TranslateMemberAccess(access),
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vtable_idx.hasValue(), udt_cvt.kind() == LF_CLASS);
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lldbassert(base_spec);
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m_bases.push_back(
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std::make_pair(vtable_idx.getValueOr(0), std::move(base_spec)));
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return qt;
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}
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void UdtRecordCompleter::AddMethod(llvm::StringRef name, TypeIndex type_idx,
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MemberAccess access, MethodOptions options,
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MemberAttributes attrs) {
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clang::QualType method_qt =
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m_ast_builder.GetOrCreateType(PdbTypeSymId(type_idx));
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m_ast_builder.CompleteType(method_qt);
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lldb::AccessType access_type = TranslateMemberAccess(access);
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bool is_artificial = (options & MethodOptions::CompilerGenerated) ==
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MethodOptions::CompilerGenerated;
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m_ast_builder.clang().AddMethodToCXXRecordType(
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m_derived_ct.GetOpaqueQualType(), name.data(), nullptr,
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m_ast_builder.ToCompilerType(method_qt), access_type, attrs.isVirtual(),
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attrs.isStatic(), false, false, false, is_artificial);
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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BaseClassRecord &base) {
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clang::QualType base_qt =
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AddBaseClassForTypeIndex(base.Type, base.getAccess());
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auto decl =
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m_ast_builder.clang().GetAsCXXRecordDecl(base_qt.getAsOpaquePtr());
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lldbassert(decl);
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auto offset = clang::CharUnits::fromQuantity(base.getBaseOffset());
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m_layout.base_offsets.insert(std::make_pair(decl, offset));
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return llvm::Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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VirtualBaseClassRecord &base) {
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AddBaseClassForTypeIndex(base.BaseType, base.getAccess(), base.VTableIndex);
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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ListContinuationRecord &cont) {
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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VFPtrRecord &vfptr) {
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(
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CVMemberRecord &cvr, StaticDataMemberRecord &static_data_member) {
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clang::QualType member_type =
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m_ast_builder.GetOrCreateType(PdbTypeSymId(static_data_member.Type));
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m_ast_builder.CompleteType(member_type);
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CompilerType member_ct = m_ast_builder.ToCompilerType(member_type);
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lldb::AccessType access =
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TranslateMemberAccess(static_data_member.getAccess());
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auto decl = TypeSystemClang::AddVariableToRecordType(
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m_derived_ct, static_data_member.Name, member_ct, access);
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// Static constant members may be a const[expr] declaration.
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// Query the symbol's value as the variable initializer if valid.
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if (member_ct.IsConst()) {
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std::string qual_name = decl->getQualifiedNameAsString();
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auto results =
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m_index.globals().findRecordsByName(qual_name, m_index.symrecords());
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for (const auto &result : results) {
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if (result.second.kind() == SymbolKind::S_CONSTANT) {
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ConstantSym constant(SymbolRecordKind::ConstantSym);
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cantFail(SymbolDeserializer::deserializeAs<ConstantSym>(result.second,
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constant));
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clang::QualType qual_type = decl->getType();
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unsigned type_width = decl->getASTContext().getIntWidth(qual_type);
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unsigned constant_width = constant.Value.getBitWidth();
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if (qual_type->isIntegralOrEnumerationType()) {
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if (type_width >= constant_width) {
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TypeSystemClang::SetIntegerInitializerForVariable(
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decl, constant.Value.extOrTrunc(type_width));
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} else {
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LLDB_LOG(GetLogIfAllCategoriesSet(LIBLLDB_LOG_AST),
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"Class '{0}' has a member '{1}' of type '{2}' ({3} bits) "
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"which resolves to a wider constant value ({4} bits). "
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"Ignoring constant.",
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m_derived_ct.GetTypeName(), static_data_member.Name,
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member_ct.GetTypeName(), type_width, constant_width);
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}
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} else {
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lldb::BasicType basic_type_enum = member_ct.GetBasicTypeEnumeration();
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switch (basic_type_enum) {
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case lldb::eBasicTypeFloat:
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case lldb::eBasicTypeDouble:
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case lldb::eBasicTypeLongDouble:
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if (type_width == constant_width) {
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TypeSystemClang::SetFloatingInitializerForVariable(
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decl, basic_type_enum == lldb::eBasicTypeFloat
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? llvm::APFloat(constant.Value.bitsToFloat())
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: llvm::APFloat(constant.Value.bitsToDouble()));
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decl->setConstexpr(true);
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} else {
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LLDB_LOG(
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GetLogIfAllCategoriesSet(LIBLLDB_LOG_AST),
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"Class '{0}' has a member '{1}' of type '{2}' ({3} bits) "
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"which resolves to a constant value of mismatched width "
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"({4} bits). Ignoring constant.",
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m_derived_ct.GetTypeName(), static_data_member.Name,
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member_ct.GetTypeName(), type_width, constant_width);
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}
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break;
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default:
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break;
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}
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}
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break;
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}
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}
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}
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// FIXME: Add a PdbSymUid namespace for field list members and update
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// the m_uid_to_decl map with this decl.
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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NestedTypeRecord &nested) {
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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DataMemberRecord &data_member) {
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uint64_t offset = data_member.FieldOffset * 8;
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uint32_t bitfield_width = 0;
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TypeIndex ti(data_member.Type);
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if (!ti.isSimple()) {
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CVType cvt = m_index.tpi().getType(ti);
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if (cvt.kind() == LF_BITFIELD) {
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BitFieldRecord bfr;
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llvm::cantFail(TypeDeserializer::deserializeAs<BitFieldRecord>(cvt, bfr));
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offset += bfr.BitOffset;
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bitfield_width = bfr.BitSize;
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ti = bfr.Type;
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}
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}
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clang::QualType member_qt = m_ast_builder.GetOrCreateType(PdbTypeSymId(ti));
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m_ast_builder.CompleteType(member_qt);
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lldb::AccessType access = TranslateMemberAccess(data_member.getAccess());
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clang::FieldDecl *decl = TypeSystemClang::AddFieldToRecordType(
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m_derived_ct, data_member.Name, m_ast_builder.ToCompilerType(member_qt),
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access, bitfield_width);
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// FIXME: Add a PdbSymUid namespace for field list members and update
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// the m_uid_to_decl map with this decl.
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m_layout.field_offsets.insert(std::make_pair(decl, offset));
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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OneMethodRecord &one_method) {
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AddMethod(one_method.Name, one_method.Type, one_method.getAccess(),
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one_method.getOptions(), one_method.Attrs);
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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OverloadedMethodRecord &overloaded) {
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TypeIndex method_list_idx = overloaded.MethodList;
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CVType method_list_type = m_index.tpi().getType(method_list_idx);
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assert(method_list_type.kind() == LF_METHODLIST);
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MethodOverloadListRecord method_list;
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llvm::cantFail(TypeDeserializer::deserializeAs<MethodOverloadListRecord>(
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method_list_type, method_list));
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for (const OneMethodRecord &method : method_list.Methods)
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AddMethod(overloaded.Name, method.Type, method.getAccess(),
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method.getOptions(), method.Attrs);
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return Error::success();
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}
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Error UdtRecordCompleter::visitKnownMember(CVMemberRecord &cvr,
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EnumeratorRecord &enumerator) {
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Declaration decl;
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llvm::StringRef name = DropNameScope(enumerator.getName());
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m_ast_builder.clang().AddEnumerationValueToEnumerationType(
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m_derived_ct, decl, name.str().c_str(), enumerator.Value);
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return Error::success();
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}
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void UdtRecordCompleter::complete() {
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// Ensure the correct order for virtual bases.
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std::stable_sort(m_bases.begin(), m_bases.end(),
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[](const IndexedBase &lhs, const IndexedBase &rhs) {
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return lhs.first < rhs.first;
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});
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std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases;
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bases.reserve(m_bases.size());
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for (auto &ib : m_bases)
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bases.push_back(std::move(ib.second));
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TypeSystemClang &clang = m_ast_builder.clang();
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clang.TransferBaseClasses(m_derived_ct.GetOpaqueQualType(), std::move(bases));
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clang.AddMethodOverridesForCXXRecordType(m_derived_ct.GetOpaqueQualType());
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TypeSystemClang::BuildIndirectFields(m_derived_ct);
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TypeSystemClang::CompleteTagDeclarationDefinition(m_derived_ct);
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if (auto *record_decl = llvm::dyn_cast<clang::CXXRecordDecl>(&m_tag_decl)) {
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m_ast_builder.importer().SetRecordLayout(record_decl, m_layout);
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}
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}
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