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//===-- PDBASTParser.cpp ----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "PDBASTParser.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/ClangUtil.h"
#include "lldb/Symbol/Declaration.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/TypeSystem.h"
#include "llvm/DebugInfo/PDB/PDBSymbol.h"
#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeArray.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionArg.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeTypedef.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
using namespace lldb;
using namespace lldb_private;
using namespace llvm;
using namespace llvm::pdb;
namespace
{
int
TranslateUdtKind(PDB_UdtType pdb_kind)
{
switch (pdb_kind)
{
case PDB_UdtType::Class:
return clang::TTK_Class;
case PDB_UdtType::Struct:
return clang::TTK_Struct;
case PDB_UdtType::Union:
return clang::TTK_Union;
case PDB_UdtType::Interface:
return clang::TTK_Interface;
}
return clang::TTK_Class;
}
lldb::Encoding
TranslateBuiltinEncoding(PDB_BuiltinType type)
{
switch (type)
{
case PDB_BuiltinType::Float:
return lldb::eEncodingIEEE754;
case PDB_BuiltinType::Int:
case PDB_BuiltinType::Long:
case PDB_BuiltinType::Char:
return lldb::eEncodingSint;
case PDB_BuiltinType::Bool:
case PDB_BuiltinType::UInt:
case PDB_BuiltinType::ULong:
case PDB_BuiltinType::HResult:
return lldb::eEncodingUint;
default:
return lldb::eEncodingInvalid;
}
}
}
PDBASTParser::PDBASTParser(lldb_private::ClangASTContext &ast) : m_ast(ast)
{
}
PDBASTParser::~PDBASTParser()
{
}
// DebugInfoASTParser interface
lldb::TypeSP
PDBASTParser::CreateLLDBTypeFromPDBType(const PDBSymbol &type)
{
// PDB doesn't maintain enough information to robustly rebuild the entire
// tree, and this is most problematic when it comes to figure out the
// right DeclContext to put a type in. So for now, everything goes in
// the translation unit decl as a fully qualified type.
clang::DeclContext *tu_decl_ctx = m_ast.GetTranslationUnitDecl();
Declaration decl;
if (auto udt = llvm::dyn_cast<PDBSymbolTypeUDT>(&type))
{
AccessType access = lldb::eAccessPublic;
PDB_UdtType udt_kind = udt->getUdtKind();
if (udt_kind == PDB_UdtType::Class)
access = lldb::eAccessPrivate;
CompilerType clang_type =
m_ast.CreateRecordType(tu_decl_ctx, access, udt->getName().c_str(), TranslateUdtKind(udt_kind),
lldb::eLanguageTypeC_plus_plus, nullptr);
m_ast.SetHasExternalStorage(clang_type.GetOpaqueQualType(), true);
return std::make_shared<Type>(type.getSymIndexId(), m_ast.GetSymbolFile(), ConstString(udt->getName()),
udt->getLength(), nullptr, LLDB_INVALID_UID, Type::eEncodingIsUID, decl,
clang_type, Type::eResolveStateForward);
}
else if (auto enum_type = llvm::dyn_cast<PDBSymbolTypeEnum>(&type))
{
std::string name = enum_type->getName();
lldb::Encoding encoding = TranslateBuiltinEncoding(enum_type->getBuiltinType());
uint64_t bytes = enum_type->getLength();
CompilerType builtin_type = m_ast.GetBuiltinTypeForEncodingAndBitSize(encoding, bytes * 8);
CompilerType ast_enum = m_ast.CreateEnumerationType(name.c_str(), tu_decl_ctx, decl, builtin_type);
auto enum_values = enum_type->findAllChildren<PDBSymbolData>();
while (auto enum_value = enum_values->getNext())
{
if (enum_value->getDataKind() != PDB_DataKind::Constant)
continue;
AddEnumValue(ast_enum, *enum_value);
}
return std::make_shared<Type>(type.getSymIndexId(), m_ast.GetSymbolFile(), ConstString(name), bytes, nullptr,
LLDB_INVALID_UID, Type::eEncodingIsUID, decl, ast_enum, Type::eResolveStateFull);
}
else if (auto type_def = llvm::dyn_cast<PDBSymbolTypeTypedef>(&type))
{
Type *target_type = m_ast.GetSymbolFile()->ResolveTypeUID(type_def->getTypeId());
std::string name = type_def->getName();
uint64_t bytes = type_def->getLength();
if (!target_type)
return nullptr;
CompilerType target_ast_type = target_type->GetFullCompilerType();
CompilerDeclContext target_decl_ctx = m_ast.GetSymbolFile()->GetDeclContextForUID(target_type->GetID());
CompilerType ast_typedef = m_ast.CreateTypedefType(target_ast_type, name.c_str(), target_decl_ctx);
return std::make_shared<Type>(type_def->getSymIndexId(), m_ast.GetSymbolFile(), ConstString(name), bytes,
nullptr, target_type->GetID(), Type::eEncodingIsTypedefUID, decl, ast_typedef,
Type::eResolveStateFull);
}
else if (auto func_sig = llvm::dyn_cast<PDBSymbolTypeFunctionSig>(&type))
{
auto arg_enum = func_sig->getArguments();
uint32_t num_args = arg_enum->getChildCount();
std::vector<CompilerType> arg_list(num_args);
while (auto arg = arg_enum->getNext())
{
Type *arg_type = m_ast.GetSymbolFile()->ResolveTypeUID(arg->getSymIndexId());
// If there's some error looking up one of the dependent types of this function signature, bail.
if (!arg_type)
return nullptr;
CompilerType arg_ast_type = arg_type->GetFullCompilerType();
arg_list.push_back(arg_ast_type);
}
auto pdb_return_type = func_sig->getReturnType();
Type *return_type = m_ast.GetSymbolFile()->ResolveTypeUID(pdb_return_type->getSymIndexId());
// If there's some error looking up one of the dependent types of this function signature, bail.
if (!return_type)
return nullptr;
CompilerType return_ast_type = return_type->GetFullCompilerType();
uint32_t type_quals = 0;
if (func_sig->isConstType())
type_quals |= clang::Qualifiers::Const;
if (func_sig->isVolatileType())
type_quals |= clang::Qualifiers::Volatile;
CompilerType func_sig_ast_type =
m_ast.CreateFunctionType(return_ast_type, &arg_list[0], num_args, false, type_quals);
return std::make_shared<Type>(func_sig->getSymIndexId(), m_ast.GetSymbolFile(), ConstString(), 0, nullptr,
LLDB_INVALID_UID, Type::eEncodingIsUID, decl, func_sig_ast_type,
Type::eResolveStateFull);
}
else if (auto array_type = llvm::dyn_cast<PDBSymbolTypeArray>(&type))
{
uint32_t num_elements = array_type->getCount();
uint32_t element_uid = array_type->getElementType()->getSymIndexId();
uint32_t bytes = array_type->getLength();
Type *element_type = m_ast.GetSymbolFile()->ResolveTypeUID(element_uid);
CompilerType element_ast_type = element_type->GetFullCompilerType();
CompilerType array_ast_type = m_ast.CreateArrayType(element_ast_type, num_elements, false);
return std::make_shared<Type>(array_type->getSymIndexId(), m_ast.GetSymbolFile(), ConstString(), bytes, nullptr,
LLDB_INVALID_UID, Type::eEncodingIsUID, decl, array_ast_type,
Type::eResolveStateFull);
}
return nullptr;
}
bool
PDBASTParser::AddEnumValue(CompilerType enum_type, const PDBSymbolData &enum_value) const
{
Declaration decl;
Variant v = enum_value.getValue();
std::string name = enum_value.getName();
int64_t raw_value;
switch (v.Type)
{
case PDB_VariantType::Int8:
raw_value = v.Value.Int8;
break;
case PDB_VariantType::Int16:
raw_value = v.Value.Int16;
break;
case PDB_VariantType::Int32:
raw_value = v.Value.Int32;
break;
case PDB_VariantType::Int64:
raw_value = v.Value.Int64;
break;
case PDB_VariantType::UInt8:
raw_value = v.Value.UInt8;
break;
case PDB_VariantType::UInt16:
raw_value = v.Value.UInt16;
break;
case PDB_VariantType::UInt32:
raw_value = v.Value.UInt32;
break;
case PDB_VariantType::UInt64:
raw_value = v.Value.UInt64;
break;
default:
return false;
}
CompilerType underlying_type = m_ast.GetEnumerationIntegerType(enum_type.GetOpaqueQualType());
uint32_t byte_size = m_ast.getASTContext()->getTypeSize(ClangUtil::GetQualType(underlying_type));
return m_ast.AddEnumerationValueToEnumerationType(enum_type.GetOpaqueQualType(), underlying_type, decl,
name.c_str(), raw_value, byte_size * 8);
}
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