mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
55633e8d06
When running Swift from within LLDB, we need to bypass resilience since LLDB does not support resilience yet. However, the bypass was done too early as part of the module loader, which had the effect of disabling resilience altogether. We still want resilience at the SIL level so that function types lower the same with debugger support turned on and off. Only IRGen needs to bypass resilience, so that LLDB can calculate fragile layouts of types. Also, the DebuggerSupport flag is not always set in the ASTContexts created by LLDB. So replace it with a new flag that only controls this behavior and nothing else, and make it part of IRGenOptions to make it totally clear that it only impacts IRGen. Together with the paired LLDB change, fixes <rdar://problem/38719739> and <rdar://problem/38483762>.
625 lines
22 KiB
C++
625 lines
22 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 - 2017 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 https://swift.org/LICENSE.txt for license information
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// See https://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/ASTContext.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/FileSystem.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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using AccessPathElem = std::pair<Identifier, SourceLoc>;
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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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assert(((ModuleBuffer && ModuleDocBuffer)
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|| (!ModuleBuffer && !ModuleDocBuffer))
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&& "Module and Module Doc buffer must both be initialized or NULL");
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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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// If there are no buffers to load into, simply check for the existence of
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// the module file.
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if (!(ModuleBuffer || ModuleDocBuffer)) {
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return llvm::sys::fs::access(StringRef(Scratch.data(), Scratch.size()),
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llvm::sys::fs::AccessMode::Exist);
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}
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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(PlatformConditionKind::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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auto tryFrameworkImport = [&](StringRef frameworkPath) -> bool {
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currPath = frameworkPath;
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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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return !err;
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};
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for (const auto &framepath : ctx.SearchPathOpts.FrameworkSearchPaths) {
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if (tryFrameworkImport(framepath.Path))
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return true;
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}
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if (ctx.LangOpts.Target.isOSDarwin()) {
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// Apple platforms have extra implicit framework search paths:
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// $SDKROOT/System/Library/Frameworks/ and $SDKROOT/Library/Frameworks/
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scratch = ctx.SearchPathOpts.SDKPath;
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llvm::sys::path::append(scratch, "System", "Library", "Frameworks");
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if (tryFrameworkImport(scratch))
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return true;
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scratch = ctx.SearchPathOpts.SDKPath;
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llvm::sys::path::append(scratch, "Library", "Frameworks");
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if (tryFrameworkImport(scratch))
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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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ModuleDecl &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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StringRef moduleBufferID = moduleInputBuffer->getBufferIdentifier();
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StringRef moduleDocBufferID;
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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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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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Ctx.bumpGeneration();
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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 << Ctx.LangOpts.EffectiveLanguageVersion;
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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.empty());
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Ctx.Diags.diagnose(*diagLoc, diag::serialization_malformed_module,
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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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bool
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SerializedModuleLoader::canImportModule(std::pair<Identifier, SourceLoc> mID) {
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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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auto bufIter = MemoryBuffers.find(mID.first.str());
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if (bufIter != MemoryBuffers.end()) {
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return true;
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}
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}
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// Otherwise look on disk.
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bool isFramework = false;
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return findModule(Ctx, mID, nullptr, nullptr, isFramework);
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}
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ModuleDecl *SerializedModuleLoader::loadModule(SourceLoc importLoc,
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ModuleDecl::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 = ModuleDecl::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<ModuleDecl::ImportedModule> &imports,
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ModuleDecl::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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ModuleDecl::LinkLibraryCallback callback) const {
|
|
llvm::SmallVector<ModuleDecl::ImportedModule, 8> Imports;
|
|
File.getImportedModules(Imports, ModuleDecl::ImportFilter::All);
|
|
|
|
for (auto Import : Imports)
|
|
Import.second->collectLinkLibraries(callback);
|
|
}
|
|
|
|
void SerializedASTFile::collectLinkLibraries(
|
|
ModuleDecl::LinkLibraryCallback callback) const {
|
|
if (isSIB()) {
|
|
collectLinkLibrariesFromImports(callback);
|
|
} else {
|
|
File.collectLinkLibraries(callback);
|
|
}
|
|
}
|
|
|
|
bool SerializedASTFile::isSystemModule() const {
|
|
if (auto Mod = File.getShadowedModule()) {
|
|
return Mod->isSystemModule();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void SerializedASTFile::lookupValue(ModuleDecl::AccessPathTy accessPath,
|
|
DeclName name, NLKind lookupKind,
|
|
SmallVectorImpl<ValueDecl*> &results) const{
|
|
if (!ModuleDecl::matchesAccessPath(accessPath, name))
|
|
return;
|
|
|
|
File.lookupValue(name, results);
|
|
}
|
|
|
|
TypeDecl *SerializedASTFile::lookupLocalType(llvm::StringRef MangledName) const{
|
|
return File.lookupLocalType(MangledName);
|
|
}
|
|
|
|
TypeDecl *
|
|
SerializedASTFile::lookupNestedType(Identifier name,
|
|
const NominalTypeDecl *parent) const {
|
|
return File.lookupNestedType(name, parent);
|
|
}
|
|
|
|
OperatorDecl *SerializedASTFile::lookupOperator(Identifier name,
|
|
DeclKind fixity) const {
|
|
return File.lookupOperator(name, fixity);
|
|
}
|
|
|
|
PrecedenceGroupDecl *
|
|
SerializedASTFile::lookupPrecedenceGroup(Identifier name) const {
|
|
return File.lookupPrecedenceGroup(name);
|
|
}
|
|
|
|
void SerializedASTFile::lookupVisibleDecls(ModuleDecl::AccessPathTy accessPath,
|
|
VisibleDeclConsumer &consumer,
|
|
NLKind lookupKind) const {
|
|
File.lookupVisibleDecls(accessPath, consumer, lookupKind);
|
|
}
|
|
|
|
void SerializedASTFile::lookupClassMembers(ModuleDecl::AccessPathTy accessPath,
|
|
VisibleDeclConsumer &consumer) const{
|
|
File.lookupClassMembers(accessPath, consumer);
|
|
}
|
|
|
|
void
|
|
SerializedASTFile::lookupClassMember(ModuleDecl::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() const {
|
|
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;
|
|
}
|