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Serialization.cpp
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//===--- Serialization.cpp - Read and write Swift modules -----------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "Serialization.h"
#include "SILFormat.h"
#include "swift/AST/AST.h"
#include "swift/AST/ASTWalker.h"
#include "swift/AST/DiagnosticsCommon.h"
#include "swift/AST/ForeignErrorConvention.h"
#include "swift/AST/LinkLibrary.h"
#include "swift/AST/Mangle.h"
#include "swift/AST/RawComment.h"
#include "swift/AST/USRGeneration.h"
#include "swift/Basic/Dwarf.h"
#include "swift/Basic/Fallthrough.h"
#include "swift/Basic/STLExtras.h"
#include "swift/Basic/SourceManager.h"
#include "swift/ClangImporter/ClangImporter.h"
#include "swift/ClangImporter/ClangModule.h"
#include "swift/Serialization/SerializationOptions.h"
#include "clang/Basic/Module.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/Bitcode/RecordLayout.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/OnDiskHashTable.h"
#include "llvm/Support/raw_ostream.h"
#include <vector>
using namespace swift;
using namespace swift::serialization;
using namespace llvm::support;
using llvm::BCBlockRAII;
namespace {
/// Used to serialize the on-disk decl hash table.
class DeclTableInfo {
public:
using key_type = Identifier;
using key_type_ref = key_type;
using data_type = Serializer::DeclTableData;
using data_type_ref = const data_type &;
using hash_value_type = uint32_t;
using offset_type = unsigned;
hash_value_type ComputeHash(key_type_ref key) {
assert(!key.empty());
return llvm::HashString(key.str());
}
std::pair<unsigned, unsigned> EmitKeyDataLength(raw_ostream &out,
key_type_ref key,
data_type_ref data) {
uint32_t keyLength = key.str().size();
uint32_t dataLength = (sizeof(DeclID) + 1) * data.size();
endian::Writer<little> writer(out);
writer.write<uint16_t>(keyLength);
writer.write<uint16_t>(dataLength);
return { keyLength, dataLength };
}
void EmitKey(raw_ostream &out, key_type_ref key, unsigned len) {
out << key.str();
}
void EmitData(raw_ostream &out, key_type_ref key, data_type_ref data,
unsigned len) {
static_assert(sizeof(DeclID) <= 4, "DeclID too large");
endian::Writer<little> writer(out);
for (auto entry : data) {
writer.write<uint8_t>(entry.first);
writer.write<uint32_t>(entry.second);
}
}
};
class LocalDeclTableInfo {
public:
using key_type = std::string;
using key_type_ref = StringRef;
using data_type = std::pair<DeclID, unsigned>; // ID, local discriminator
using data_type_ref = const data_type &;
using hash_value_type = uint32_t;
using offset_type = unsigned;
hash_value_type ComputeHash(key_type_ref key) {
assert(!key.empty());
return llvm::HashString(key);
}
std::pair<unsigned, unsigned> EmitKeyDataLength(raw_ostream &out,
key_type_ref key,
data_type_ref data) {
uint32_t keyLength = key.size();
uint32_t dataLength = sizeof(DeclID) + sizeof(unsigned);
endian::Writer<little> writer(out);
writer.write<uint16_t>(keyLength);
return { keyLength, dataLength };
}
void EmitKey(raw_ostream &out, key_type_ref key, unsigned len) {
out << key;
}
void EmitData(raw_ostream &out, key_type_ref key, data_type_ref data,
unsigned len) {
static_assert(sizeof(DeclID) <= 4, "DeclID too large");
endian::Writer<little> writer(out);
writer.write<DeclID>(data.first);
writer.write<unsigned>(data.second);
}
};
using LocalTypeHashTableGenerator =
llvm::OnDiskChainedHashTableGenerator<LocalDeclTableInfo>;
} // end anonymous namespace
namespace llvm {
template<> struct DenseMapInfo<Serializer::DeclTypeUnion> {
using DeclTypeUnion = Serializer::DeclTypeUnion;
static inline DeclTypeUnion getEmptyKey() { return nullptr; }
static inline DeclTypeUnion getTombstoneKey() { return swift::Type(); }
static unsigned getHashValue(const DeclTypeUnion &val) {
return DenseMapInfo<const void *>::getHashValue(val.getOpaqueValue());
}
static bool isEqual(const DeclTypeUnion &lhs, const DeclTypeUnion &rhs) {
return lhs == rhs;
}
};
}
static Module *getModule(ModuleOrSourceFile DC) {
if (auto M = DC.dyn_cast<Module *>())
return M;
return DC.get<SourceFile *>()->getParentModule();
}
static ASTContext &getContext(ModuleOrSourceFile DC) {
return getModule(DC)->getASTContext();
}
static bool shouldSerializeAsLocalContext(const DeclContext *DC) {
return DC->isLocalContext() && !isa<AbstractFunctionDecl>(DC);
}
static const Decl *getDeclForContext(const DeclContext *DC) {
switch (DC->getContextKind()) {
case DeclContextKind::Module:
// Use a null decl to represent the module.
return nullptr;
case DeclContextKind::FileUnit:
return getDeclForContext(DC->getParent());
case DeclContextKind::SerializedLocal:
llvm_unreachable("Serialized local contexts should only come from deserialization");
case DeclContextKind::Initializer:
case DeclContextKind::AbstractClosureExpr:
// FIXME: What about default functions?
llvm_unreachable("shouldn't serialize decls from anonymous closures");
case DeclContextKind::NominalTypeDecl:
return cast<NominalTypeDecl>(DC);
case DeclContextKind::ExtensionDecl:
return cast<ExtensionDecl>(DC);
case DeclContextKind::TopLevelCodeDecl:
llvm_unreachable("shouldn't serialize the main module");
case DeclContextKind::AbstractFunctionDecl:
return cast<AbstractFunctionDecl>(DC);
}
}
namespace {
struct Accessors {
StorageKind Kind;
FuncDecl *Get = nullptr, *Set = nullptr, *MaterializeForSet = nullptr;
FuncDecl *Address = nullptr, *MutableAddress = nullptr;
FuncDecl *WillSet = nullptr, *DidSet = nullptr;
};
}
static StorageKind getRawStorageKind(AbstractStorageDecl::StorageKindTy kind) {
switch (kind) {
#define CASE(KIND) case AbstractStorageDecl::KIND: return StorageKind::KIND
CASE(Stored);
CASE(StoredWithTrivialAccessors);
CASE(StoredWithObservers);
CASE(InheritedWithObservers);
CASE(Computed);
CASE(ComputedWithMutableAddress);
CASE(Addressed);
CASE(AddressedWithTrivialAccessors);
CASE(AddressedWithObservers);
#undef CASE
}
llvm_unreachable("bad storage kind");
}
static Accessors getAccessors(const AbstractStorageDecl *storage) {
Accessors accessors;
accessors.Kind = getRawStorageKind(storage->getStorageKind());
switch (auto storageKind = storage->getStorageKind()) {
case AbstractStorageDecl::Stored:
return accessors;
case AbstractStorageDecl::Addressed:
case AbstractStorageDecl::AddressedWithTrivialAccessors:
case AbstractStorageDecl::ComputedWithMutableAddress:
accessors.Address = storage->getAddressor();
accessors.MutableAddress = storage->getMutableAddressor();
if (storageKind == AbstractStorageDecl::Addressed)
return accessors;
goto getset;
case AbstractStorageDecl::StoredWithObservers:
case AbstractStorageDecl::InheritedWithObservers:
case AbstractStorageDecl::AddressedWithObservers:
accessors.WillSet = storage->getWillSetFunc();
accessors.DidSet = storage->getDidSetFunc();
goto getset;
case AbstractStorageDecl::StoredWithTrivialAccessors:
case AbstractStorageDecl::Computed:
getset:
accessors.Get = storage->getGetter();
accessors.Set = storage->getSetter();
accessors.MaterializeForSet = storage->getMaterializeForSetFunc();
return accessors;
}
llvm_unreachable("bad storage kind");
}
DeclID Serializer::addLocalDeclContextRef(const DeclContext *DC) {
assert(DC->isLocalContext() && "Expected a local DeclContext");
auto &id = LocalDeclContextIDs[DC];
if (id != 0)
return id;
id = { ++LastLocalDeclContextID };
LocalDeclContextsToWrite.push(DC);
return id;
}
DeclContextID Serializer::addDeclContextRef(const DeclContext *DC) {
switch (DC->getContextKind()) {
case DeclContextKind::Module:
case DeclContextKind::FileUnit: // Skip up to the module
return 0;
default:
break;
}
// If this decl context is a plain old serializable decl, queue it up for
// normal serialization.
if (shouldSerializeAsLocalContext(DC))
addLocalDeclContextRef(DC);
else
addDeclRef(getDeclForContext(DC));
auto &id = DeclContextIDs[DC];
if (id)
return id;
id = { ++LastDeclContextID };
DeclContextsToWrite.push(DC);
return id;
}
DeclID Serializer::addDeclRef(const Decl *D, bool forceSerialization) {
if (!D)
return 0;
DeclIDAndForce &id = DeclAndTypeIDs[D];
if (id.first != 0) {
if (forceSerialization && !id.second)
id.second = true;
return id.first;
}
assert((!isDeclXRef(D) || isa<ValueDecl>(D) || isa<OperatorDecl>(D)) &&
"cannot cross-reference this decl");
// Record any generic parameters that come from this decl, so that we can use
// the decl to refer to the parameters later.
const GenericParamList *paramList = nullptr;
if (auto fn = dyn_cast<AbstractFunctionDecl>(D))
paramList = fn->getGenericParams();
else if (auto nominal = dyn_cast<NominalTypeDecl>(D))
paramList = nominal->getGenericParams();
else if (auto ext = dyn_cast<ExtensionDecl>(D))
paramList = ext->getGenericParams();
if (paramList)
GenericContexts[paramList] = D;
id = { ++LastDeclID, forceSerialization };
DeclsAndTypesToWrite.push(D);
return id.first;
}
TypeID Serializer::addTypeRef(Type ty) {
if (!ty)
return 0;
auto &id = DeclAndTypeIDs[ty];
if (id.first != 0)
return id.first;
id = { ++LastTypeID, true };
DeclsAndTypesToWrite.push(ty);
return id.first;
}
IdentifierID Serializer::addIdentifierRef(Identifier ident) {
if (ident.empty())
return 0;
IdentifierID &id = IdentifierIDs[ident];
if (id != 0)
return id;
id = ++LastIdentifierID;
IdentifiersToWrite.push_back(ident);
return id;
}
IdentifierID Serializer::addModuleRef(const Module *M) {
if (M == this->M)
return CURRENT_MODULE_ID;
if (M == this->M->getASTContext().TheBuiltinModule)
return BUILTIN_MODULE_ID;
auto clangImporter =
static_cast<ClangImporter *>(
this->M->getASTContext().getClangModuleLoader());
if (M == clangImporter->getImportedHeaderModule())
return OBJC_HEADER_MODULE_ID;
assert(!M->getName().empty());
return addIdentifierRef(M->getName());
}
NormalConformanceID Serializer::addConformanceRef(
const NormalProtocolConformance *conformance) {
assert(conformance->getDeclContext()->getParentModule() == M &&
"cannot reference conformance from another module");
auto &conformanceID = NormalConformances[conformance];
if (conformanceID)
return conformanceID;
conformanceID = ++LastNormalConformanceID;
NormalConformancesToWrite.push(conformance);
return conformanceID;
}
const Decl *Serializer::getGenericContext(const GenericParamList *paramList) {
auto contextDecl = GenericContexts.lookup(paramList);
return contextDecl;
}
/// Record the name of a block.
static void emitBlockID(llvm::BitstreamWriter &out, unsigned ID,
StringRef name,
SmallVectorImpl<unsigned char> &nameBuffer) {
SmallVector<unsigned, 1> idBuffer;
idBuffer.push_back(ID);
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, idBuffer);
// Emit the block name if present.
if (name.empty())
return;
nameBuffer.resize(name.size());
memcpy(nameBuffer.data(), name.data(), name.size());
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, nameBuffer);
}
/// Record the name of a record within a block.
static void emitRecordID(llvm::BitstreamWriter &out, unsigned ID,
StringRef name,
SmallVectorImpl<unsigned char> &nameBuffer) {
assert(ID < 256 && "can't fit record ID in next to name");
nameBuffer.resize(name.size()+1);
nameBuffer[0] = ID;
memcpy(nameBuffer.data()+1, name.data(), name.size());
out.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, nameBuffer);
}
void Serializer::writeBlockInfoBlock() {
BCBlockRAII restoreBlock(Out, llvm::bitc::BLOCKINFO_BLOCK_ID, 2);
SmallVector<unsigned char, 64> nameBuffer;
#define BLOCK(X) emitBlockID(Out, X ## _ID, #X, nameBuffer)
#define BLOCK_RECORD(K, X) emitRecordID(Out, K::X, #X, nameBuffer)
BLOCK(MODULE_BLOCK);
BLOCK(CONTROL_BLOCK);
BLOCK_RECORD(control_block, METADATA);
BLOCK_RECORD(control_block, MODULE_NAME);
BLOCK_RECORD(control_block, TARGET);
BLOCK(OPTIONS_BLOCK);
BLOCK_RECORD(options_block, SDK_PATH);
BLOCK_RECORD(options_block, XCC);
BLOCK_RECORD(options_block, IS_SIB);
BLOCK_RECORD(options_block, IS_TESTABLE);
BLOCK(INPUT_BLOCK);
BLOCK_RECORD(input_block, IMPORTED_MODULE);
BLOCK_RECORD(input_block, LINK_LIBRARY);
BLOCK_RECORD(input_block, IMPORTED_HEADER);
BLOCK_RECORD(input_block, IMPORTED_HEADER_CONTENTS);
BLOCK_RECORD(input_block, MODULE_FLAGS);
BLOCK_RECORD(input_block, SEARCH_PATH);
BLOCK(DECLS_AND_TYPES_BLOCK);
#define RECORD(X) BLOCK_RECORD(decls_block, X);
#include "swift/Serialization/DeclTypeRecordNodes.def"
BLOCK(IDENTIFIER_DATA_BLOCK);
BLOCK_RECORD(identifier_block, IDENTIFIER_DATA);
BLOCK(INDEX_BLOCK);
BLOCK_RECORD(index_block, TYPE_OFFSETS);
BLOCK_RECORD(index_block, DECL_OFFSETS);
BLOCK_RECORD(index_block, IDENTIFIER_OFFSETS);
BLOCK_RECORD(index_block, TOP_LEVEL_DECLS);
BLOCK_RECORD(index_block, OPERATORS);
BLOCK_RECORD(index_block, EXTENSIONS);
BLOCK_RECORD(index_block, CLASS_MEMBERS);
BLOCK_RECORD(index_block, OPERATOR_METHODS);
BLOCK_RECORD(index_block, OBJC_METHODS);
BLOCK_RECORD(index_block, ENTRY_POINT);
BLOCK_RECORD(index_block, LOCAL_DECL_CONTEXT_OFFSETS);
BLOCK_RECORD(index_block, DECL_CONTEXT_OFFSETS);
BLOCK_RECORD(index_block, LOCAL_TYPE_DECLS);
BLOCK_RECORD(index_block, NORMAL_CONFORMANCE_OFFSETS);
BLOCK(SIL_BLOCK);
BLOCK_RECORD(sil_block, SIL_FUNCTION);
BLOCK_RECORD(sil_block, SIL_BASIC_BLOCK);
BLOCK_RECORD(sil_block, SIL_ONE_VALUE_ONE_OPERAND);
BLOCK_RECORD(sil_block, SIL_ONE_TYPE);
BLOCK_RECORD(sil_block, SIL_ONE_OPERAND);
BLOCK_RECORD(sil_block, SIL_ONE_TYPE_ONE_OPERAND);
BLOCK_RECORD(sil_block, SIL_ONE_TYPE_VALUES);
BLOCK_RECORD(sil_block, SIL_TWO_OPERANDS);
BLOCK_RECORD(sil_block, SIL_INST_APPLY);
BLOCK_RECORD(sil_block, SIL_INST_NO_OPERAND);
BLOCK_RECORD(sil_block, SIL_VTABLE);
BLOCK_RECORD(sil_block, SIL_VTABLE_ENTRY);
BLOCK_RECORD(sil_block, SIL_GLOBALVAR);
BLOCK_RECORD(sil_block, SIL_INST_CAST);
BLOCK_RECORD(sil_block, SIL_INIT_EXISTENTIAL);
BLOCK_RECORD(sil_block, SIL_WITNESSTABLE);
BLOCK_RECORD(sil_block, SIL_WITNESS_METHOD_ENTRY);
BLOCK_RECORD(sil_block, SIL_WITNESS_BASE_ENTRY);
BLOCK_RECORD(sil_block, SIL_WITNESS_ASSOC_PROTOCOL);
BLOCK_RECORD(sil_block, SIL_WITNESS_ASSOC_ENTRY);
BLOCK_RECORD(sil_block, SIL_GENERIC_OUTER_PARAMS);
BLOCK_RECORD(sil_block, SIL_INST_WITNESS_METHOD);
// These layouts can exist in both decl blocks and sil blocks.
#define BLOCK_RECORD_WITH_NAMESPACE(K, X) emitRecordID(Out, X, #X, nameBuffer)
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::BOUND_GENERIC_SUBSTITUTION);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::NO_CONFORMANCE);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::NORMAL_PROTOCOL_CONFORMANCE);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::SPECIALIZED_PROTOCOL_CONFORMANCE);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::INHERITED_PROTOCOL_CONFORMANCE);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::NORMAL_PROTOCOL_CONFORMANCE_ID);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::PROTOCOL_CONFORMANCE_XREF);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::GENERIC_PARAM_LIST);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::GENERIC_PARAM);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::GENERIC_REQUIREMENT);
BLOCK_RECORD_WITH_NAMESPACE(sil_block,
decls_block::LAST_GENERIC_REQUIREMENT);
BLOCK(SIL_INDEX_BLOCK);
BLOCK_RECORD(sil_index_block, SIL_FUNC_NAMES);
BLOCK_RECORD(sil_index_block, SIL_FUNC_OFFSETS);
BLOCK_RECORD(sil_index_block, SIL_VTABLE_NAMES);
BLOCK_RECORD(sil_index_block, SIL_VTABLE_OFFSETS);
BLOCK_RECORD(sil_index_block, SIL_GLOBALVAR_NAMES);
BLOCK_RECORD(sil_index_block, SIL_GLOBALVAR_OFFSETS);
BLOCK_RECORD(sil_index_block, SIL_WITNESSTABLE_NAMES);
BLOCK_RECORD(sil_index_block, SIL_WITNESSTABLE_OFFSETS);
#undef BLOCK
#undef BLOCK_RECORD
}
void Serializer::writeDocBlockInfoBlock() {
BCBlockRAII restoreBlock(Out, llvm::bitc::BLOCKINFO_BLOCK_ID, 2);
SmallVector<unsigned char, 64> nameBuffer;
#define BLOCK(X) emitBlockID(Out, X ## _ID, #X, nameBuffer)
#define BLOCK_RECORD(K, X) emitRecordID(Out, K::X, #X, nameBuffer)
BLOCK(MODULE_DOC_BLOCK);
BLOCK(CONTROL_BLOCK);
BLOCK_RECORD(control_block, METADATA);
BLOCK_RECORD(control_block, MODULE_NAME);
BLOCK_RECORD(control_block, TARGET);
BLOCK(COMMENT_BLOCK);
BLOCK_RECORD(comment_block, DECL_COMMENTS);
#undef BLOCK
#undef BLOCK_RECORD
}
void Serializer::writeHeader(const SerializationOptions &options) {
{
BCBlockRAII restoreBlock(Out, CONTROL_BLOCK_ID, 3);
control_block::ModuleNameLayout ModuleName(Out);
control_block::MetadataLayout Metadata(Out);
control_block::TargetLayout Target(Out);
ModuleName.emit(ScratchRecord, M->getName().str());
// FIXME: put a real version in here.
#ifdef LLVM_VERSION_INFO
# define EXTRA_VERSION_STRING PACKAGE_STRING LLVM_VERSION_INFO
#else
# define EXTRA_VERSION_STRING PACKAGE_STRING
#endif
Metadata.emit(ScratchRecord,
VERSION_MAJOR, VERSION_MINOR, EXTRA_VERSION_STRING);
#undef EXTRA_VERSION_STRING
Target.emit(ScratchRecord, M->getASTContext().LangOpts.Target.str());
{
llvm::BCBlockRAII restoreBlock(Out, OPTIONS_BLOCK_ID, 3);
options_block::IsSIBLayout IsSIB(Out);
IsSIB.emit(ScratchRecord, options.IsSIB);
if (M->isTestingEnabled()) {
options_block::IsTestableLayout IsTestable(Out);
IsTestable.emit(ScratchRecord);
}
if (options.SerializeOptionsForDebugging) {
options_block::SDKPathLayout SDKPath(Out);
options_block::XCCLayout XCC(Out);
SDKPath.emit(ScratchRecord, M->getASTContext().SearchPathOpts.SDKPath);
for (const std::string &arg : options.ExtraClangOptions) {
XCC.emit(ScratchRecord, arg);
}
}
}
}
}
void Serializer::writeDocHeader() {
{
BCBlockRAII restoreBlock(Out, CONTROL_BLOCK_ID, 3);
control_block::ModuleNameLayout ModuleName(Out);
control_block::MetadataLayout Metadata(Out);
control_block::TargetLayout Target(Out);
// FIXME: put a real version in here.
#ifdef LLVM_VERSION_INFO
# define EXTRA_VERSION_STRING PACKAGE_STRING LLVM_VERSION_INFO
#else
# define EXTRA_VERSION_STRING PACKAGE_STRING
#endif
Metadata.emit(ScratchRecord,
VERSION_MAJOR, VERSION_MINOR, EXTRA_VERSION_STRING);
#undef EXTRA_VERSION_STRING
Target.emit(ScratchRecord, M->getASTContext().LangOpts.Target.str());
}
}
static void
removeDuplicateImports(SmallVectorImpl<Module::ImportedModule> &imports) {
std::sort(imports.begin(), imports.end(),
[](const Module::ImportedModule &lhs,
const Module::ImportedModule &rhs) -> bool {
// Arbitrarily sort by name to get a deterministic order.
// FIXME: Submodules don't get sorted properly here.
if (lhs.second != rhs.second)
return lhs.second->getName().str() < rhs.second->getName().str();
using AccessPathElem = std::pair<Identifier, SourceLoc>;
return std::lexicographical_compare(lhs.first.begin(), lhs.first.end(),
rhs.first.begin(), rhs.first.end(),
[](const AccessPathElem &lElem,
const AccessPathElem &rElem) {
return lElem.first.str() < rElem.first.str();
});
});
auto last = std::unique(imports.begin(), imports.end(),
[](const Module::ImportedModule &lhs,
const Module::ImportedModule &rhs) -> bool {
if (lhs.second != rhs.second)
return false;
return Module::isSameAccessPath(lhs.first, rhs.first);
});
imports.erase(last, imports.end());
}
using ImportPathBlob = llvm::SmallString<64>;
static void flattenImportPath(const Module::ImportedModule &import,
ImportPathBlob &out) {
ArrayRef<FileUnit *> files = import.second->getFiles();
if (auto clangModule = dyn_cast<ClangModuleUnit>(files.front())) {
// FIXME: This is an awful hack to handle Clang submodules.
// Once Swift has a native notion of submodules, this can go away.
const clang::Module *submodule = clangModule->getClangModule();
SmallVector<StringRef, 4> submoduleNames;
do {
submoduleNames.push_back(submodule->Name);
submodule = submodule->Parent;
} while (submodule);
interleave(submoduleNames.rbegin(), submoduleNames.rend(),
[&out](StringRef next) { out.append(next); },
[&out] { out.push_back('\0'); });
} else {
out.append(import.second->getName().str());
}
if (import.first.empty())
return;
out.push_back('\0');
assert(import.first.size() == 1 && "can only handle top-level decl imports");
auto accessPathElem = import.first.front();
out.append(accessPathElem.first.str());
}
void Serializer::writeInputBlock(const SerializationOptions &options) {
BCBlockRAII restoreBlock(Out, INPUT_BLOCK_ID, 4);
input_block::ImportedModuleLayout ImportedModule(Out);
input_block::LinkLibraryLayout LinkLibrary(Out);
input_block::ImportedHeaderLayout ImportedHeader(Out);
input_block::ImportedHeaderContentsLayout ImportedHeaderContents(Out);
input_block::ModuleFlagsLayout ModuleFlags(Out);
input_block::SearchPathLayout SearchPath(Out);
if (options.SerializeOptionsForDebugging) {
const SearchPathOptions &searchPathOpts = M->getASTContext().SearchPathOpts;
for (auto &path : searchPathOpts.ImportSearchPaths)
SearchPath.emit(ScratchRecord, /*framework=*/false, path);
for (auto &path : searchPathOpts.FrameworkSearchPaths)
SearchPath.emit(ScratchRecord, /*framework=*/true, path);
}
// FIXME: Having to deal with private imports as a superset of public imports
// is inefficient.
SmallVector<Module::ImportedModule, 8> publicImports;
SmallVector<Module::ImportedModule, 8> allImports;
for (auto file : M->getFiles()) {
file->getImportedModules(publicImports, Module::ImportFilter::Public);
file->getImportedModules(allImports, Module::ImportFilter::All);
}
llvm::SmallSet<Module::ImportedModule, 8, Module::OrderImportedModules>
publicImportSet;
publicImportSet.insert(publicImports.begin(), publicImports.end());
removeDuplicateImports(allImports);
auto clangImporter =
static_cast<ClangImporter *>(M->getASTContext().getClangModuleLoader());
Module *importedHeaderModule = clangImporter->getImportedHeaderModule();
Module *theBuiltinModule = M->getASTContext().TheBuiltinModule;
for (auto import : allImports) {
if (import.second == theBuiltinModule)
continue;
if (import.second == importedHeaderModule) {
off_t importedHeaderSize = 0;
time_t importedHeaderModTime = 0;
std::string contents;
if (!options.ImportedHeader.empty())
contents = clangImporter->getBridgingHeaderContents(
options.ImportedHeader, importedHeaderSize, importedHeaderModTime);
ImportedHeader.emit(ScratchRecord, publicImportSet.count(import),
importedHeaderSize, importedHeaderModTime,
options.ImportedHeader);
if (!contents.empty()) {
contents.push_back('\0');
ImportedHeaderContents.emit(ScratchRecord, contents);
}
continue;
}
ImportPathBlob importPath;
flattenImportPath(import, importPath);
ImportedModule.emit(ScratchRecord, publicImportSet.count(import),
!import.first.empty(), importPath);
}
if (!options.ModuleLinkName.empty()) {
LinkLibrary.emit(ScratchRecord, serialization::LibraryKind::Library,
options.AutolinkForceLoad, options.ModuleLinkName);
}
ModuleFlags.emit(ScratchRecord, options.HasUnderlyingModule);
}
/// Translate AST default argument kind to the Serialization enum values, which
/// are guaranteed to be stable.
static uint8_t getRawStableDefaultArgumentKind(swift::DefaultArgumentKind kind) {
switch (kind) {
#define CASE(X) \
case swift::DefaultArgumentKind::X: \
return static_cast<uint8_t>(serialization::DefaultArgumentKind::X);
CASE(None)
CASE(Normal)
CASE(Inherited)
CASE(Column)
CASE(File)
CASE(Line)
CASE(Function)
CASE(DSOHandle)
#undef CASE
}
}
static uint8_t getRawStableMetatypeRepresentation(AnyMetatypeType *metatype) {
if (!metatype->hasRepresentation()) {
return serialization::MetatypeRepresentation::MR_None;
}
switch (metatype->getRepresentation()) {
case swift::MetatypeRepresentation::Thin:
return serialization::MetatypeRepresentation::MR_Thin;
case swift::MetatypeRepresentation::Thick:
return serialization::MetatypeRepresentation::MR_Thick;
case swift::MetatypeRepresentation::ObjC:
return serialization::MetatypeRepresentation::MR_ObjC;
}
llvm_unreachable("bad representation");
}
static uint8_t getRawStableAddressorKind(swift::AddressorKind kind) {
switch (kind) {
case swift::AddressorKind::NotAddressor:
return uint8_t(serialization::AddressorKind::NotAddressor);
case swift::AddressorKind::Unsafe:
return uint8_t(serialization::AddressorKind::Unsafe);
case swift::AddressorKind::Owning:
return uint8_t(serialization::AddressorKind::Owning);
case swift::AddressorKind::NativeOwning:
return uint8_t(serialization::AddressorKind::NativeOwning);
case swift::AddressorKind::NativePinning:
return uint8_t(serialization::AddressorKind::NativePinning);
}
llvm_unreachable("bad addressor kind");
}
void Serializer::writePattern(const Pattern *pattern) {
using namespace decls_block;
assert(pattern && "null pattern");
switch (pattern->getKind()) {
case PatternKind::Paren: {
unsigned abbrCode = DeclTypeAbbrCodes[ParenPatternLayout::Code];
ParenPatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
pattern->isImplicit());
writePattern(cast<ParenPattern>(pattern)->getSubPattern());
break;
}
case PatternKind::Tuple: {
auto tuple = cast<TuplePattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[TuplePatternLayout::Code];
TuplePatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addTypeRef(tuple->getType()),
tuple->getNumElements(), tuple->hasVararg(),
tuple->isImplicit());
abbrCode = DeclTypeAbbrCodes[TuplePatternEltLayout::Code];
for (auto &elt : tuple->getElements()) {
// FIXME: Default argument expressions?
TuplePatternEltLayout::emitRecord(
Out, ScratchRecord, abbrCode, addIdentifierRef(elt.getLabel()),
getRawStableDefaultArgumentKind(elt.getDefaultArgKind()));
writePattern(elt.getPattern());
}
break;
}
case PatternKind::Named: {
auto named = cast<NamedPattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[NamedPatternLayout::Code];
NamedPatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addDeclRef(named->getDecl()),
named->isImplicit());
break;
}
case PatternKind::Any: {
unsigned abbrCode = DeclTypeAbbrCodes[AnyPatternLayout::Code];
AnyPatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addTypeRef(pattern->getType()),
pattern->isImplicit());
break;
}
case PatternKind::Typed: {
auto typed = cast<TypedPattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[TypedPatternLayout::Code];
TypedPatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addTypeRef(typed->getType()),
typed->isImplicit());
writePattern(typed->getSubPattern());
break;
}
case PatternKind::Is: {
auto isa = cast<IsPattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[IsPatternLayout::Code];
IsPatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addTypeRef(isa->getCastTypeLoc().getType()),
isa->isImplicit());
break;
}
case PatternKind::NominalType: {
auto nom = cast<NominalTypePattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[NominalTypePatternLayout::Code];
auto castTy = nom->getCastTypeLoc().getType();
NominalTypePatternLayout::emitRecord(Out, ScratchRecord, abbrCode,
addTypeRef(castTy),
nom->getElements().size(),
nom->isImplicit());
abbrCode = DeclTypeAbbrCodes[NominalTypePatternEltLayout::Code];
for (auto &elt : nom->getElements()) {
NominalTypePatternEltLayout::emitRecord(Out, ScratchRecord, abbrCode,
addDeclRef(elt.getProperty()));
writePattern(elt.getSubPattern());
}
break;
}
case PatternKind::EnumElement:
case PatternKind::OptionalSome:
case PatternKind::Bool:
case PatternKind::Expr:
llvm_unreachable("FIXME: not implemented");
case PatternKind::Var: {
auto var = cast<VarPattern>(pattern);
unsigned abbrCode = DeclTypeAbbrCodes[VarPatternLayout::Code];
VarPatternLayout::emitRecord(Out, ScratchRecord, abbrCode, var->isLet(),
var->isImplicit());
writePattern(var->getSubPattern());
break;
}
}
}
/// Translate from the requirement kind to the Serialization enum
/// values, which are guaranteed to be stable.
static uint8_t getRawStableRequirementKind(RequirementKind kind) {
#define CASE(KIND) \
case RequirementKind::KIND: \
return GenericRequirementKind::KIND;
switch (kind) {
CASE(Conformance)
CASE(SameType)
CASE(WitnessMarker)
}
#undef CASE
}
void Serializer::writeRequirements(ArrayRef<Requirement> requirements) {
using namespace decls_block;
if (requirements.empty())
return;
auto reqAbbrCode = DeclTypeAbbrCodes[GenericRequirementLayout::Code];
for (const auto &req : requirements) {
GenericRequirementLayout::emitRecord(
Out, ScratchRecord, reqAbbrCode,
getRawStableRequirementKind(req.getKind()),
addTypeRef(req.getFirstType()),
addTypeRef(req.getSecondType()),
StringRef());
}
}
bool Serializer::writeGenericParams(const GenericParamList *genericParams,
const std::array<unsigned, 256> &abbrCodes) {
using namespace decls_block;
// Don't write anything if there are no generic params.
if (!genericParams)
return true;
SmallVector<TypeID, 8> archetypeIDs;
for (auto archetype : genericParams->getAllArchetypes())
archetypeIDs.push_back(addTypeRef(archetype));
unsigned abbrCode = abbrCodes[GenericParamListLayout::Code];
GenericParamListLayout::emitRecord(Out, ScratchRecord, abbrCode,
archetypeIDs);
abbrCode = abbrCodes[GenericParamLayout::Code];
for (auto next : genericParams->getParams()) {
GenericParamLayout::emitRecord(Out, ScratchRecord, abbrCode,
addDeclRef(next));
}
abbrCode = abbrCodes[GenericRequirementLayout::Code];
SmallString<64> ReqStr;
for (auto next : genericParams->getRequirements()) {
ReqStr.clear();
llvm::raw_svector_ostream ReqOS(ReqStr);
next.printAsWritten(ReqOS);
switch (next.getKind()) {
case RequirementKind::Conformance:
GenericRequirementLayout::emitRecord(
Out, ScratchRecord, abbrCode,
GenericRequirementKind::Conformance,
addTypeRef(next.getSubject()),
addTypeRef(next.getConstraint()),
ReqOS.str());
break;
case RequirementKind::SameType:
GenericRequirementLayout::emitRecord(
Out, ScratchRecord, abbrCode,
GenericRequirementKind::SameType,
addTypeRef(next.getFirstType()),
addTypeRef(next.getSecondType()),
ReqOS.str());
break;
case RequirementKind::WitnessMarker:
llvm_unreachable("Can't show up in requirement representations");
break;
}
}
abbrCode = abbrCodes[LastGenericRequirementLayout::Code];
uint8_t dummy = 0;
LastGenericRequirementLayout::emitRecord(Out, ScratchRecord, abbrCode, dummy);
return true;
}
void Serializer::writeNormalConformance(
const NormalProtocolConformance *conformance) {
using namespace decls_block;
// The conformance must be complete, or we can't serialize it.
assert(conformance->isComplete());
auto conformanceID = NormalConformances[conformance];
assert(conformanceID != 0 && "normal conformance not referenced properly");
(void)conformanceID;
assert((conformanceID - 1) == NormalConformanceOffsets.size());
NormalConformanceOffsets.push_back(Out.GetCurrentBitNo());
auto protocol = conformance->getProtocol();
SmallVector<DeclID, 32> data;
unsigned numValueWitnesses = 0;
unsigned numTypeWitnesses = 0;
unsigned numDefaultedDefinitions = 0;
// Collect the set of protocols inherited by this conformance.
SmallVector<ProtocolDecl *, 8> inheritedProtos;
for (auto inheritedMapping : conformance->getInheritedConformances()) {
inheritedProtos.push_back(inheritedMapping.first);
}
// Sort the protocols so that we get a deterministic ordering.
llvm::array_pod_sort(inheritedProtos.begin(), inheritedProtos.end(),