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//===- NativeSession.cpp - Native implementation of IPDBSession -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/DebugInfo/CodeView/TypeIndex.h"
#include "llvm/DebugInfo/PDB/GenericError.h"
#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
#include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
#include "llvm/DebugInfo/PDB/Native/NativeBuiltinSymbol.h"
#include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
#include "llvm/DebugInfo/PDB/Native/NativeExeSymbol.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/RawError.h"
#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
#include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include <algorithm>
#include <memory>
#include <utility>
using namespace llvm;
using namespace llvm::msf;
using namespace llvm::pdb;
namespace {
// Maps codeview::SimpleTypeKind of a built-in type to the parameters necessary
// to instantiate a NativeBuiltinSymbol for that type.
static const struct BuiltinTypeEntry {
codeview::SimpleTypeKind Kind;
PDB_BuiltinType Type;
uint32_t Size;
} BuiltinTypes[] = {
{codeview::SimpleTypeKind::Int32, PDB_BuiltinType::Int, 4},
{codeview::SimpleTypeKind::UInt32, PDB_BuiltinType::UInt, 4},
{codeview::SimpleTypeKind::UInt32Long, PDB_BuiltinType::UInt, 4},
{codeview::SimpleTypeKind::UInt64Quad, PDB_BuiltinType::UInt, 8},
{codeview::SimpleTypeKind::NarrowCharacter, PDB_BuiltinType::Char, 1},
{codeview::SimpleTypeKind::SignedCharacter, PDB_BuiltinType::Char, 1},
{codeview::SimpleTypeKind::UnsignedCharacter, PDB_BuiltinType::UInt, 1},
{codeview::SimpleTypeKind::UInt16Short, PDB_BuiltinType::UInt, 2},
{codeview::SimpleTypeKind::Boolean8, PDB_BuiltinType::Bool, 1}
// This table can be grown as necessary, but these are the only types we've
// needed so far.
};
} // namespace
NativeSession::NativeSession(std::unique_ptr<PDBFile> PdbFile,
std::unique_ptr<BumpPtrAllocator> Allocator)
: Pdb(std::move(PdbFile)), Allocator(std::move(Allocator)) {}
NativeSession::~NativeSession() = default;
Error NativeSession::createFromPdb(StringRef Path,
std::unique_ptr<IPDBSession> &Session) {
ErrorOr<std::unique_ptr<MemoryBuffer>> ErrorOrBuffer =
MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
/*RequiresNullTerminator=*/false);
if (!ErrorOrBuffer)
return make_error<GenericError>(generic_error_code::invalid_path);
std::unique_ptr<MemoryBuffer> Buffer = std::move(*ErrorOrBuffer);
auto Stream = llvm::make_unique<MemoryBufferByteStream>(
std::move(Buffer), llvm::support::little);
auto Allocator = llvm::make_unique<BumpPtrAllocator>();
auto File = llvm::make_unique<PDBFile>(Path, std::move(Stream), *Allocator);
if (auto EC = File->parseFileHeaders())
return EC;
if (auto EC = File->parseStreamData())
return EC;
Session =
llvm::make_unique<NativeSession>(std::move(File), std::move(Allocator));
return Error::success();
}
Error NativeSession::createFromExe(StringRef Path,
std::unique_ptr<IPDBSession> &Session) {
return make_error<RawError>(raw_error_code::feature_unsupported);
}
std::unique_ptr<PDBSymbolCompiland>
NativeSession::createCompilandSymbol(DbiModuleDescriptor MI) {
const auto Id = static_cast<SymIndexId>(SymbolCache.size());
SymbolCache.push_back(
llvm::make_unique<NativeCompilandSymbol>(*this, Id, MI));
return llvm::make_unique<PDBSymbolCompiland>(
*this, std::unique_ptr<IPDBRawSymbol>(SymbolCache[Id]->clone()));
}
SymIndexId NativeSession::findSymbolByTypeIndex(codeview::TypeIndex Index) {
// First see if it's already in our cache.
const auto Entry = TypeIndexToSymbolId.find(Index);
if (Entry != TypeIndexToSymbolId.end())
return Entry->second;
// Symbols for built-in types are created on the fly.
if (Index.isSimple()) {
// FIXME: We will eventually need to handle pointers to other simple types,
// which are still simple types in the world of CodeView TypeIndexes.
if (Index.getSimpleMode() != codeview::SimpleTypeMode::Direct)
return 0;
const auto Kind = Index.getSimpleKind();
const auto It =
std::find_if(std::begin(BuiltinTypes), std::end(BuiltinTypes),
[Kind](const BuiltinTypeEntry &Builtin) {
return Builtin.Kind == Kind;
});
if (It == std::end(BuiltinTypes))
return 0;
SymIndexId Id = SymbolCache.size();
SymbolCache.emplace_back(
llvm::make_unique<NativeBuiltinSymbol>(*this, Id, It->Type, It->Size));
TypeIndexToSymbolId[Index] = Id;
return Id;
}
// TODO: Look up PDB type by type index
return 0;
}
uint64_t NativeSession::getLoadAddress() const { return 0; }
void NativeSession::setLoadAddress(uint64_t Address) {}
std::unique_ptr<PDBSymbolExe> NativeSession::getGlobalScope() {
const auto Id = static_cast<SymIndexId>(SymbolCache.size());
SymbolCache.push_back(llvm::make_unique<NativeExeSymbol>(*this, Id));
auto RawSymbol = SymbolCache[Id]->clone();
auto PdbSymbol(PDBSymbol::create(*this, std::move(RawSymbol)));
std::unique_ptr<PDBSymbolExe> ExeSymbol(
static_cast<PDBSymbolExe *>(PdbSymbol.release()));
return ExeSymbol;
}
std::unique_ptr<PDBSymbol>
NativeSession::getSymbolById(uint32_t SymbolId) const {
// If the caller has a SymbolId, it'd better be in our SymbolCache.
return SymbolId < SymbolCache.size()
? PDBSymbol::create(*this, SymbolCache[SymbolId]->clone())
: nullptr;
}
std::unique_ptr<PDBSymbol>
NativeSession::findSymbolByAddress(uint64_t Address, PDB_SymType Type) const {
return nullptr;
}
std::unique_ptr<IPDBEnumLineNumbers>
NativeSession::findLineNumbers(const PDBSymbolCompiland &Compiland,
const IPDBSourceFile &File) const {
return nullptr;
}
std::unique_ptr<IPDBEnumLineNumbers>
NativeSession::findLineNumbersByAddress(uint64_t Address,
uint32_t Length) const {
return nullptr;
}
std::unique_ptr<IPDBEnumSourceFiles>
NativeSession::findSourceFiles(const PDBSymbolCompiland *Compiland,
StringRef Pattern,
PDB_NameSearchFlags Flags) const {
return nullptr;
}
std::unique_ptr<IPDBSourceFile>
NativeSession::findOneSourceFile(const PDBSymbolCompiland *Compiland,
StringRef Pattern,
PDB_NameSearchFlags Flags) const {
return nullptr;
}
std::unique_ptr<IPDBEnumChildren<PDBSymbolCompiland>>
NativeSession::findCompilandsForSourceFile(StringRef Pattern,
PDB_NameSearchFlags Flags) const {
return nullptr;
}
std::unique_ptr<PDBSymbolCompiland>
NativeSession::findOneCompilandForSourceFile(StringRef Pattern,
PDB_NameSearchFlags Flags) const {
return nullptr;
}
std::unique_ptr<IPDBEnumSourceFiles> NativeSession::getAllSourceFiles() const {
return nullptr;
}
std::unique_ptr<IPDBEnumSourceFiles> NativeSession::getSourceFilesForCompiland(
const PDBSymbolCompiland &Compiland) const {
return nullptr;
}
std::unique_ptr<IPDBSourceFile>
NativeSession::getSourceFileById(uint32_t FileId) const {
return nullptr;
}
std::unique_ptr<IPDBEnumDataStreams> NativeSession::getDebugStreams() const {
return nullptr;
}
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