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This ensures only one process is generating module cache from an interface file so that we don't blow up memory usage when multiple processes are doing the same. The locking mechanism is similar to that of Clang's. A better approach is that the build system takes care of the module building step as a formal dependency. rdar://52839445
114 lines
4.4 KiB
C++
114 lines
4.4 KiB
C++
//===----- ModuleInterfaceBuilder.h - Compiles .swiftinterface files ------===//
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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) 2019 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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#ifndef SWIFT_FRONTEND_MODULEINTERFACEBUILDER_H
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#define SWIFT_FRONTEND_MODULEINTERFACEBUILDER_H
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#include "swift/Basic/LLVM.h"
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#include "swift/Basic/SourceLoc.h"
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#include "swift/Frontend/Frontend.h"
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#include "swift/Serialization/SerializationOptions.h"
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namespace llvm {
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namespace vfs {
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class FileSystem;
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}
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}
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namespace swift {
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class DiagnosticEngine;
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class LangOptions;
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class SearchPathOptions;
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class DependencyTracker;
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class ModuleInterfaceBuilder {
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llvm::vfs::FileSystem &fs;
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DiagnosticEngine &diags;
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const StringRef interfacePath;
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const StringRef moduleName;
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const StringRef moduleCachePath;
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const StringRef prebuiltCachePath;
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const bool serializeDependencyHashes;
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const bool trackSystemDependencies;
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const bool remarkOnRebuildFromInterface;
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const SourceLoc diagnosticLoc;
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DependencyTracker *const dependencyTracker;
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CompilerInvocation subInvocation;
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SmallVector<StringRef, 3> extraDependencies;
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void configureSubInvocationInputsAndOutputs(StringRef OutPath);
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void configureSubInvocation(const SearchPathOptions &SearchPathOpts,
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const LangOptions &LangOpts,
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ClangModuleLoader *ClangLoader);
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/// Populate the provided \p Deps with \c FileDependency entries for all
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/// dependencies \p SubInstance's DependencyTracker recorded while compiling
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/// the module, excepting .swiftmodules in \p moduleCachePath or
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/// \p prebuiltCachePath. Those have _their_ dependencies added instead, both
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/// to avoid having to do recursive scanning when rechecking this dependency
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/// in future and to make the module caches relocatable.
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bool collectDepsForSerialization(
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CompilerInstance &SubInstance,
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SmallVectorImpl<SerializationOptions::FileDependency> &Deps,
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bool IsHashBased);
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bool extractSwiftInterfaceVersionAndArgs(
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version::Version &Vers, llvm::StringSaver &SubArgSaver,
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SmallVectorImpl<const char *> &SubArgs);
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bool buildSwiftModuleInternal(StringRef OutPath, bool ShouldSerializeDeps,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer);
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public:
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ModuleInterfaceBuilder(SourceManager &sourceMgr, DiagnosticEngine &diags,
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const SearchPathOptions &searchPathOpts,
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const LangOptions &langOpts,
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ClangModuleLoader *clangImporter,
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StringRef interfacePath,
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StringRef moduleName,
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StringRef moduleCachePath,
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StringRef prebuiltCachePath,
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bool serializeDependencyHashes = false,
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bool trackSystemDependencies = false,
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bool remarkOnRebuildFromInterface = false,
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SourceLoc diagnosticLoc = SourceLoc(),
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DependencyTracker *tracker = nullptr)
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: fs(*sourceMgr.getFileSystem()), diags(diags),
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interfacePath(interfacePath), moduleName(moduleName),
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moduleCachePath(moduleCachePath), prebuiltCachePath(prebuiltCachePath),
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serializeDependencyHashes(serializeDependencyHashes),
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trackSystemDependencies(trackSystemDependencies),
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remarkOnRebuildFromInterface(remarkOnRebuildFromInterface),
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diagnosticLoc(diagnosticLoc), dependencyTracker(tracker) {
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configureSubInvocation(searchPathOpts, langOpts, clangImporter);
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}
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const CompilerInvocation &getSubInvocation() const {
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return subInvocation;
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}
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/// Ensures the requested file name is added as a dependency of the resulting
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/// module.
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void addExtraDependency(StringRef path) {
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extraDependencies.push_back(path);
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}
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bool buildSwiftModule(StringRef OutPath, bool ShouldSerializeDeps,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer,
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llvm::function_ref<void()> RemarkRebuild = nullptr);
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};
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} // end namespace swift
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#endif // defined(SWIFT_FRONTEND_MODULEINTERFACEBUILDER_H)
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