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#include "llvm/DebugInfo/PDB/Native/SymbolCache.h"
#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
#include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
#include "llvm/DebugInfo/PDB/Native/NativeEnumTypes.h"
#include "llvm/DebugInfo/PDB/Native/NativeRawSymbol.h"
#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
#include "llvm/DebugInfo/PDB/Native/NativeTypeBuiltin.h"
#include "llvm/DebugInfo/PDB/Native/NativeTypeEnum.h"
#include "llvm/DebugInfo/PDB/Native/NativeTypePointer.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
#include "llvm/DebugInfo/PDB/PDBSymbol.h"
#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
#include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h"
using namespace llvm;
using namespace llvm::pdb;
// 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.
};
SymbolCache::SymbolCache(NativeSession &Session, DbiStream *Dbi)
: Session(Session), Dbi(Dbi) {
// Id 0 is reserved for the invalid symbol.
Cache.push_back(nullptr);
if (Dbi)
Compilands.resize(Dbi->modules().getModuleCount());
}
std::unique_ptr<PDBSymbolTypeEnum>
SymbolCache::createEnumSymbol(codeview::TypeIndex Index) {
const auto Id = findSymbolByTypeIndex(Index);
return PDBSymbol::createAs<PDBSymbolTypeEnum>(Session, *Cache[Id]);
}
std::unique_ptr<IPDBEnumSymbols>
SymbolCache::createTypeEnumerator(codeview::TypeLeafKind Kind) {
auto Tpi = Session.getPDBFile().getPDBTpiStream();
if (!Tpi) {
consumeError(Tpi.takeError());
return nullptr;
}
auto &Types = Tpi->typeCollection();
return std::unique_ptr<IPDBEnumSymbols>(
new NativeEnumTypes(Session, Types, Kind));
}
SymIndexId SymbolCache::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 = Cache.size();
Cache.emplace_back(
llvm::make_unique<NativeTypeBuiltin>(Session, Id, It->Type, It->Size));
TypeIndexToSymbolId[Index] = Id;
return Id;
}
// We need to instantiate and cache the desired type symbol.
auto Tpi = Session.getPDBFile().getPDBTpiStream();
if (!Tpi) {
consumeError(Tpi.takeError());
return 0;
}
codeview::LazyRandomTypeCollection &Types = Tpi->typeCollection();
const codeview::CVType &CVT = Types.getType(Index);
// TODO(amccarth): Make this handle all types, not just LF_ENUMs.
SymIndexId Id = 0;
switch (CVT.kind()) {
case codeview::LF_ENUM:
Id = createSymbol<NativeTypeEnum>(CVT);
break;
case codeview::LF_POINTER:
Id = createSymbol<NativeTypePointer>(CVT);
break;
default:
Id = createSymbolPlaceholder();
break;
}
TypeIndexToSymbolId[Index] = Id;
return Id;
}
std::unique_ptr<PDBSymbol>
SymbolCache::getSymbolById(SymIndexId SymbolId) const {
// Id 0 is reserved.
if (SymbolId == 0)
return nullptr;
// If the caller has a SymbolId, it'd better be in our SymbolCache.
return SymbolId < Cache.size() ? PDBSymbol::create(Session, *Cache[SymbolId])
: nullptr;
}
NativeRawSymbol &SymbolCache::getNativeSymbolById(SymIndexId SymbolId) const {
return *Cache[SymbolId];
}
uint32_t SymbolCache::getNumCompilands() const {
if (!Dbi)
return 0;
return Dbi->modules().getModuleCount();
}
std::unique_ptr<PDBSymbolCompiland>
SymbolCache::getOrCreateCompiland(uint32_t Index) {
if (!Dbi)
return nullptr;
if (Index >= Compilands.size())
return nullptr;
if (Compilands[Index] == 0) {
const DbiModuleList &Modules = Dbi->modules();
Compilands[Index] =
createSymbol<NativeCompilandSymbol>(Modules.getModuleDescriptor(Index));
}
return Session.getConcreteSymbolById<PDBSymbolCompiland>(Compilands[Index]);
}
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