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e92e00bc5b
Instead, just go on to the next search path. This prevents a present-but-unreadable directory from leading to a module load failure, which happens when one user builds a module and another user loads it (even if those search paths aren't even being used). There might still be some other errors that would be useful to treat as "module found but invalid" rather than "module not found", but experience has shown that it's the wrong default. There is a Radar for this but I can't find it.
579 lines
20 KiB
C++
579 lines
20 KiB
C++
//===--- SerializedModuleLoader.cpp - Import Swift modules ----------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Serialization/SerializedModuleLoader.h"
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#include "swift/Serialization/ModuleFile.h"
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#include "swift/Strings.h"
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#include "swift/AST/AST.h"
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#include "swift/AST/DiagnosticsSema.h"
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#include "swift/Basic/STLExtras.h"
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#include "swift/Basic/SourceManager.h"
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#include "swift/Basic/Version.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Debug.h"
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#include <system_error>
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using namespace swift;
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namespace {
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typedef std::pair<Identifier, SourceLoc> AccessPathElem;
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} // end unnamed namespace
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// Defined out-of-line so that we can see ~ModuleFile.
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SerializedModuleLoader::SerializedModuleLoader(ASTContext &ctx,
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DependencyTracker *tracker)
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: ModuleLoader(tracker), Ctx(ctx) {}
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SerializedModuleLoader::~SerializedModuleLoader() = default;
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static std::error_code
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openModuleFiles(StringRef DirName, StringRef ModuleFilename,
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StringRef ModuleDocFilename,
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std::unique_ptr<llvm::MemoryBuffer> &ModuleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> &ModuleDocBuffer,
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llvm::SmallVectorImpl<char> &Scratch) {
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// Try to open the module file first. If we fail, don't even look for the
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// module documentation file.
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Scratch.clear();
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llvm::sys::path::append(Scratch, DirName, ModuleFilename);
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ModuleOrErr =
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llvm::MemoryBuffer::getFile(StringRef(Scratch.data(), Scratch.size()));
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if (!ModuleOrErr)
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return ModuleOrErr.getError();
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// Try to open the module documentation file. If it does not exist, ignore
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// the error. However, pass though all other errors.
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Scratch.clear();
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llvm::sys::path::append(Scratch, DirName, ModuleDocFilename);
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ModuleDocOrErr =
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llvm::MemoryBuffer::getFile(StringRef(Scratch.data(), Scratch.size()));
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if (!ModuleDocOrErr &&
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ModuleDocOrErr.getError() != std::errc::no_such_file_or_directory) {
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return ModuleDocOrErr.getError();
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}
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ModuleBuffer = std::move(ModuleOrErr.get());
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if (ModuleDocOrErr)
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ModuleDocBuffer = std::move(ModuleDocOrErr.get());
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return std::error_code();
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}
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static bool
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findModule(ASTContext &ctx, AccessPathElem moduleID,
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std::unique_ptr<llvm::MemoryBuffer> &moduleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> &moduleDocBuffer,
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bool &isFramework) {
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llvm::SmallString<64> moduleFilename(moduleID.first.str());
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moduleFilename += '.';
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moduleFilename += SERIALIZED_MODULE_EXTENSION;
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llvm::SmallString<64> moduleDocFilename(moduleID.first.str());
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moduleDocFilename += '.';
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moduleDocFilename += SERIALIZED_MODULE_DOC_EXTENSION;
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// FIXME: Which name should we be using here? Do we care about CPU subtypes?
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// FIXME: At the very least, don't hardcode "arch".
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llvm::SmallString<16> archFile{
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ctx.LangOpts.getPlatformConditionValue("arch")};
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llvm::SmallString<16> archDocFile{archFile};
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if (!archFile.empty()) {
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archFile += '.';
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archFile += SERIALIZED_MODULE_EXTENSION;
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archDocFile += '.';
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archDocFile += SERIALIZED_MODULE_DOC_EXTENSION;
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}
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llvm::SmallString<128> scratch;
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llvm::SmallString<128> currPath;
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isFramework = false;
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for (auto path : ctx.SearchPathOpts.ImportSearchPaths) {
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auto err = openModuleFiles(path,
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moduleFilename.str(), moduleDocFilename.str(),
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moduleBuffer, moduleDocBuffer,
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scratch);
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if (err == std::errc::is_a_directory) {
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currPath = path;
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llvm::sys::path::append(currPath, moduleFilename.str());
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err = openModuleFiles(currPath,
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archFile.str(), archDocFile.str(),
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moduleBuffer, moduleDocBuffer,
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scratch);
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}
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if (!err)
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return true;
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}
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{
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llvm::SmallString<64> moduleFramework(moduleID.first.str());
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moduleFramework += ".framework";
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isFramework = true;
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for (auto path : ctx.SearchPathOpts.FrameworkSearchPaths) {
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currPath = path;
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llvm::sys::path::append(currPath, moduleFramework.str(),
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"Modules", moduleFilename.str());
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auto err = openModuleFiles(currPath,
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archFile.str(), archDocFile.str(),
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moduleBuffer, moduleDocBuffer,
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scratch);
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if (!err)
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return true;
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}
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}
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// If we're not allowed to look in the runtime library import path, stop.
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if (ctx.SearchPathOpts.SkipRuntimeLibraryImportPath)
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return false;
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// Search the runtime import path.
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isFramework = false;
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return !openModuleFiles(ctx.SearchPathOpts.RuntimeLibraryImportPath,
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moduleFilename.str(), moduleDocFilename.str(),
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moduleBuffer, moduleDocBuffer, scratch);
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}
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FileUnit *SerializedModuleLoader::loadAST(
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Module &M, Optional<SourceLoc> diagLoc,
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std::unique_ptr<llvm::MemoryBuffer> moduleInputBuffer,
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std::unique_ptr<llvm::MemoryBuffer> moduleDocInputBuffer,
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bool isFramework) {
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assert(moduleInputBuffer);
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const char *moduleBufferID = moduleInputBuffer->getBufferIdentifier();
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const char *moduleDocBufferID = nullptr;
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if (moduleDocInputBuffer)
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moduleDocBufferID = moduleDocInputBuffer->getBufferIdentifier();
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if (moduleInputBuffer->getBufferSize() % 4 != 0) {
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if (diagLoc)
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_malformed_module,
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moduleBufferID);
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return nullptr;
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}
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serialization::ExtendedValidationInfo extendedInfo;
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std::unique_ptr<ModuleFile> loadedModuleFile;
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serialization::ValidationInfo loadInfo =
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ModuleFile::load(std::move(moduleInputBuffer),
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std::move(moduleDocInputBuffer),
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isFramework, loadedModuleFile,
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&extendedInfo);
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if (loadInfo.status == serialization::Status::Valid) {
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Ctx.bumpGeneration();
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M.setResilienceStrategy(extendedInfo.getResilienceStrategy());
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// We've loaded the file. Now try to bring it into the AST.
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auto fileUnit = new (Ctx) SerializedASTFile(M, *loadedModuleFile,
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extendedInfo.isSIB());
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M.addFile(*fileUnit);
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if (extendedInfo.isTestable())
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M.setTestingEnabled();
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auto diagLocOrInvalid = diagLoc.getValueOr(SourceLoc());
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loadInfo.status =
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loadedModuleFile->associateWithFileContext(fileUnit, diagLocOrInvalid);
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if (loadInfo.status == serialization::Status::Valid) {
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LoadedModuleFiles.emplace_back(std::move(loadedModuleFile),
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Ctx.getCurrentGeneration());
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return fileUnit;
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}
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M.removeFile(*fileUnit);
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}
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// This is the failure path. If we have a location, diagnose the issue.
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if (!diagLoc)
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return nullptr;
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auto diagnoseDifferentLanguageVersion = [&](StringRef shortVersion) -> bool {
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if (shortVersion.empty())
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return false;
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SmallString<32> versionBuf;
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llvm::raw_svector_ostream versionString(versionBuf);
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versionString << version::Version::getCurrentLanguageVersion();
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if (versionString.str() == shortVersion)
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return false;
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Ctx.Diags.diagnose(*diagLoc,
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diag::serialization_module_language_version_mismatch,
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loadInfo.shortVersion, versionString.str(),
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moduleBufferID);
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return true;
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};
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switch (loadInfo.status) {
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case serialization::Status::Valid:
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llvm_unreachable("At this point we know loading has failed");
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case serialization::Status::FormatTooNew:
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if (diagnoseDifferentLanguageVersion(loadInfo.shortVersion))
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break;
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_module_too_new,
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moduleBufferID);
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break;
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case serialization::Status::FormatTooOld:
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if (diagnoseDifferentLanguageVersion(loadInfo.shortVersion))
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break;
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_module_too_old,
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M.getName(), moduleBufferID);
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break;
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case serialization::Status::Malformed:
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_malformed_module,
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moduleBufferID);
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break;
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case serialization::Status::MalformedDocumentation:
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assert(moduleDocBufferID);
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_malformed_module,
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moduleDocBufferID ? moduleDocBufferID : "");
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break;
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case serialization::Status::MissingDependency: {
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// Figure out /which/ dependencies are missing.
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// FIXME: Dependencies should be de-duplicated at serialization time,
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// not now.
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llvm::StringMap<bool> duplicates;
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llvm::SmallVector<ModuleFile::Dependency, 4> missing;
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std::copy_if(loadedModuleFile->getDependencies().begin(),
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loadedModuleFile->getDependencies().end(),
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std::back_inserter(missing),
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[&duplicates](const ModuleFile::Dependency &dependency)->bool {
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if (dependency.isLoaded() || dependency.isHeader())
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return false;
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bool &seen = duplicates[dependency.RawPath];
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if (seen)
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return false;
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seen = true;
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return true;
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});
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// FIXME: only show module part of RawAccessPath
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assert(!missing.empty() && "unknown missing dependency?");
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if (missing.size() == 1) {
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Ctx.Diags.diagnose(*diagLoc,diag::serialization_missing_single_dependency,
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missing.front().getPrettyPrintedPath());
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} else {
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llvm::SmallString<64> missingNames;
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missingNames += '\'';
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interleave(missing,
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[&](const ModuleFile::Dependency &next) {
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missingNames += next.getPrettyPrintedPath();
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},
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[&] { missingNames += "', '"; });
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missingNames += '\'';
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_missing_dependencies,
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missingNames);
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}
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if (Ctx.SearchPathOpts.SDKPath.empty() &&
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llvm::Triple(llvm::sys::getProcessTriple()).isMacOSX()) {
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Ctx.Diags.diagnose(SourceLoc(), diag::sema_no_import_no_sdk);
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Ctx.Diags.diagnose(SourceLoc(), diag::sema_no_import_no_sdk_xcrun);
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}
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break;
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}
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case serialization::Status::MissingShadowedModule: {
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_missing_shadowed_module,
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M.getName());
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if (Ctx.SearchPathOpts.SDKPath.empty() &&
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llvm::Triple(llvm::sys::getProcessTriple()).isMacOSX()) {
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Ctx.Diags.diagnose(SourceLoc(), diag::sema_no_import_no_sdk);
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Ctx.Diags.diagnose(SourceLoc(), diag::sema_no_import_no_sdk_xcrun);
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}
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break;
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}
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case serialization::Status::FailedToLoadBridgingHeader:
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// We already emitted a diagnostic about the bridging header. Just emit
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// a generic message here.
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_load_failed, M.getName());
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break;
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case serialization::Status::NameMismatch: {
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// FIXME: This doesn't handle a non-debugger REPL, which should also treat
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// this as a non-fatal error.
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auto diagKind = diag::serialization_name_mismatch;
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if (Ctx.LangOpts.DebuggerSupport)
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diagKind = diag::serialization_name_mismatch_repl;
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Ctx.Diags.diagnose(*diagLoc, diagKind,
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loadInfo.name, M.getName());
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break;
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}
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case serialization::Status::TargetIncompatible: {
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// FIXME: This doesn't handle a non-debugger REPL, which should also treat
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// this as a non-fatal error.
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auto diagKind = diag::serialization_target_incompatible;
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if (Ctx.LangOpts.DebuggerSupport)
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diagKind = diag::serialization_target_incompatible_repl;
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Ctx.Diags.diagnose(*diagLoc, diagKind,
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loadInfo.targetTriple, moduleBufferID);
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break;
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}
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case serialization::Status::TargetTooNew: {
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llvm::Triple moduleTarget(llvm::Triple::normalize(loadInfo.targetTriple));
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StringRef osName;
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unsigned major, minor, micro;
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if (moduleTarget.isMacOSX()) {
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osName = swift::prettyPlatformString(PlatformKind::OSX);
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moduleTarget.getMacOSXVersion(major, minor, micro);
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} else {
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osName = moduleTarget.getOSName();
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moduleTarget.getOSVersion(major, minor, micro);
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}
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// FIXME: This doesn't handle a non-debugger REPL, which should also treat
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// this as a non-fatal error.
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auto diagKind = diag::serialization_target_too_new;
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if (Ctx.LangOpts.DebuggerSupport)
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diagKind = diag::serialization_target_too_new_repl;
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Ctx.Diags.diagnose(*diagLoc, diagKind,
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osName, major, minor, micro, moduleBufferID);
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break;
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}
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}
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return nullptr;
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}
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Module *SerializedModuleLoader::loadModule(SourceLoc importLoc,
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Module::AccessPathTy path) {
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// FIXME: Swift submodules?
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if (path.size() > 1)
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return nullptr;
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auto moduleID = path[0];
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bool isFramework = false;
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std::unique_ptr<llvm::MemoryBuffer> moduleInputBuffer;
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std::unique_ptr<llvm::MemoryBuffer> moduleDocInputBuffer;
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// First see if we find it in the registered memory buffers.
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if (!MemoryBuffers.empty()) {
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// FIXME: Right now this works only with access paths of length 1.
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// Once submodules are designed, this needs to support suffix
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// matching and a search path.
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auto bufIter = MemoryBuffers.find(moduleID.first.str());
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if (bufIter != MemoryBuffers.end()) {
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moduleInputBuffer = std::move(bufIter->second);
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MemoryBuffers.erase(bufIter);
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}
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}
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// Otherwise look on disk.
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if (!moduleInputBuffer) {
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if (!findModule(Ctx, moduleID, moduleInputBuffer, moduleDocInputBuffer,
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isFramework)) {
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return nullptr;
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}
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addDependency(moduleInputBuffer->getBufferIdentifier());
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}
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assert(moduleInputBuffer);
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auto M = Module::create(moduleID.first, Ctx);
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Ctx.LoadedModules[moduleID.first] = M;
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if (!loadAST(*M, moduleID.second, std::move(moduleInputBuffer),
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std::move(moduleDocInputBuffer), isFramework)) {
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M->setFailedToLoad();
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}
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return M;
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}
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void SerializedModuleLoader::loadExtensions(NominalTypeDecl *nominal,
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unsigned previousGeneration) {
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for (auto &modulePair : LoadedModuleFiles) {
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if (modulePair.second <= previousGeneration)
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continue;
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modulePair.first->loadExtensions(nominal);
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}
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}
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void SerializedModuleLoader::loadObjCMethods(
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ClassDecl *classDecl,
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ObjCSelector selector,
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bool isInstanceMethod,
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unsigned previousGeneration,
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llvm::TinyPtrVector<AbstractFunctionDecl *> &methods) {
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for (auto &modulePair : LoadedModuleFiles) {
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if (modulePair.second <= previousGeneration)
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continue;
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modulePair.first->loadObjCMethods(classDecl, selector, isInstanceMethod,
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methods);
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}
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}
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void SerializedModuleLoader::verifyAllModules() {
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#ifndef NDEBUG
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for (const LoadedModulePair &loaded : LoadedModuleFiles)
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loaded.first->verify();
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#endif
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}
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//-----------------------------------------------------------------------------
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// SerializedASTFile implementation
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//-----------------------------------------------------------------------------
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void SerializedASTFile::getImportedModules(
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SmallVectorImpl<Module::ImportedModule> &imports,
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Module::ImportFilter filter) const {
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File.getImportedModules(imports, filter);
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}
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void SerializedASTFile::collectLinkLibrariesFromImports(
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Module::LinkLibraryCallback callback) const {
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llvm::SmallVector<Module::ImportedModule, 8> Imports;
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File.getImportedModules(Imports, Module::ImportFilter::All);
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for (auto Import : Imports)
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Import.second->collectLinkLibraries(callback);
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}
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void SerializedASTFile::collectLinkLibraries(
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Module::LinkLibraryCallback callback) const {
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if (isSIB()) {
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collectLinkLibrariesFromImports(callback);
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} else {
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if (File.getAssociatedModule()->getResilienceStrategy()
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== ResilienceStrategy::Fragile) {
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collectLinkLibrariesFromImports(callback);
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}
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File.collectLinkLibraries(callback);
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}
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}
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bool SerializedASTFile::isSystemModule() const {
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if (auto Mod = File.getShadowedModule()) {
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return Mod->isSystemModule();
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}
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return false;
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}
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void SerializedASTFile::lookupValue(Module::AccessPathTy accessPath,
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DeclName name, NLKind lookupKind,
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SmallVectorImpl<ValueDecl*> &results) const{
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if (!Module::matchesAccessPath(accessPath, name))
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return;
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File.lookupValue(name, results);
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}
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TypeDecl *SerializedASTFile::lookupLocalType(llvm::StringRef MangledName) const{
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return File.lookupLocalType(MangledName);
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}
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OperatorDecl *SerializedASTFile::lookupOperator(Identifier name,
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DeclKind fixity) const {
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return File.lookupOperator(name, fixity);
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}
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PrecedenceGroupDecl *
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SerializedASTFile::lookupPrecedenceGroup(Identifier name) const {
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return File.lookupPrecedenceGroup(name);
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}
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void SerializedASTFile::lookupVisibleDecls(Module::AccessPathTy accessPath,
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VisibleDeclConsumer &consumer,
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NLKind lookupKind) const {
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File.lookupVisibleDecls(accessPath, consumer, lookupKind);
|
|
}
|
|
|
|
void SerializedASTFile::lookupClassMembers(Module::AccessPathTy accessPath,
|
|
VisibleDeclConsumer &consumer) const{
|
|
File.lookupClassMembers(accessPath, consumer);
|
|
}
|
|
|
|
void
|
|
SerializedASTFile::lookupClassMember(Module::AccessPathTy accessPath,
|
|
DeclName name,
|
|
SmallVectorImpl<ValueDecl*> &decls) const {
|
|
File.lookupClassMember(accessPath, name, decls);
|
|
}
|
|
|
|
void SerializedASTFile::lookupObjCMethods(
|
|
ObjCSelector selector,
|
|
SmallVectorImpl<AbstractFunctionDecl *> &results) const {
|
|
File.lookupObjCMethods(selector, results);
|
|
}
|
|
|
|
Optional<CommentInfo>
|
|
SerializedASTFile::getCommentForDecl(const Decl *D) const {
|
|
return File.getCommentForDecl(D);
|
|
}
|
|
|
|
Optional<StringRef>
|
|
SerializedASTFile::getGroupNameForDecl(const Decl *D) const {
|
|
return File.getGroupNameForDecl(D);
|
|
}
|
|
|
|
|
|
Optional<StringRef>
|
|
SerializedASTFile::getSourceFileNameForDecl(const Decl *D) const {
|
|
return File.getSourceFileNameForDecl(D);
|
|
}
|
|
|
|
Optional<unsigned>
|
|
SerializedASTFile::getSourceOrderForDecl(const Decl *D) const {
|
|
return File.getSourceOrderForDecl(D);
|
|
}
|
|
|
|
void
|
|
SerializedASTFile::collectAllGroups(std::vector<StringRef> &Names) const {
|
|
File.collectAllGroups(Names);
|
|
};
|
|
|
|
Optional<StringRef>
|
|
SerializedASTFile::getGroupNameByUSR(StringRef USR) const {
|
|
return File.getGroupNameByUSR(USR);
|
|
}
|
|
|
|
void
|
|
SerializedASTFile::getTopLevelDecls(SmallVectorImpl<Decl*> &results) const {
|
|
File.getTopLevelDecls(results);
|
|
}
|
|
|
|
void
|
|
SerializedASTFile::getLocalTypeDecls(SmallVectorImpl<TypeDecl*> &results) const{
|
|
File.getLocalTypeDecls(results);
|
|
}
|
|
|
|
void SerializedASTFile::getDisplayDecls(SmallVectorImpl<Decl*> &results) const {
|
|
File.getDisplayDecls(results);
|
|
}
|
|
|
|
StringRef SerializedASTFile::getFilename() const {
|
|
return File.getModuleFilename();
|
|
}
|
|
|
|
const clang::Module *SerializedASTFile::getUnderlyingClangModule() {
|
|
if (auto *ShadowedModule = File.getShadowedModule())
|
|
return ShadowedModule->findUnderlyingClangModule();
|
|
return nullptr;
|
|
}
|
|
|
|
Identifier
|
|
SerializedASTFile::getDiscriminatorForPrivateValue(const ValueDecl *D) const {
|
|
Identifier discriminator = File.getDiscriminatorForPrivateValue(D);
|
|
assert(!discriminator.empty() && "no discriminator found for value");
|
|
return discriminator;
|
|
}
|