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ca749de113
Teach scanner cache loader to validate the CAS contents when validating dependency graph loaded.
104 lines
4.2 KiB
C++
104 lines
4.2 KiB
C++
//===--- ScanDependencies.h -- Scans the dependencies of a module ------===//
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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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#ifndef SWIFT_DEPENDENCY_SCANDEPENDENCIES_H
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#define SWIFT_DEPENDENCY_SCANDEPENDENCIES_H
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#include "swift-c/DependencyScan/DependencyScan.h"
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#include "swift/AST/DiagnosticEngine.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Support/Chrono.h"
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#include "llvm/Support/ErrorOr.h"
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#include <unordered_set>
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namespace llvm {
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class StringSaver;
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namespace vfs {
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class FileSystem;
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} // namespace vfs
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} // namespace llvm
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namespace swift {
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class CompilerInvocation;
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class CompilerInstance;
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class DiagnosticEngine;
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class ModuleDependenciesCache;
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struct ModuleDependencyID;
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struct ModuleDependencyIDHash;
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using ModuleDependencyIDSet =
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std::unordered_set<ModuleDependencyID, ModuleDependencyIDHash>;
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class SwiftDependencyScanningService;
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namespace dependencies {
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class DependencyScanDiagnosticCollector;
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using CompilerArgInstanceCacheMap =
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llvm::StringMap<std::tuple<std::unique_ptr<CompilerInstance>,
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std::unique_ptr<SwiftDependencyScanningService>,
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std::unique_ptr<ModuleDependenciesCache>>>;
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// MARK: FrontendTool dependency scanner entry points
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/// Scans the dependencies of the main module of \c instance and writes out
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/// the resulting JSON according to the instance's output parameters.
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bool scanDependencies(CompilerInstance &instance);
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/// Identify all imports in the translation unit's module.
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bool prescanDependencies(CompilerInstance &instance);
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// MARK: Dependency scanning execution
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/// Scans the dependencies of the main module of \c instance.
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llvm::ErrorOr<swiftscan_dependency_graph_t>
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performModuleScan(CompilerInstance &instance,
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DependencyScanDiagnosticCollector *diagnostics,
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ModuleDependenciesCache &cache);
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/// Scans the main module of \c instance for all direct module imports
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llvm::ErrorOr<swiftscan_import_set_t>
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performModulePrescan(CompilerInstance &instance,
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DependencyScanDiagnosticCollector *diagnostics,
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ModuleDependenciesCache &cache);
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namespace incremental {
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/// For the given module dependency graph captured in the 'cache',
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/// validate whether each dependency node is up-to-date w.r.t. serialization
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/// time-stamp. i.e. if any of the input files of a module dependency are newer
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/// than the serialized dependency graph, it is considered invalidated and must
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/// be re-scanned.
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void validateInterModuleDependenciesCache(
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const ModuleDependencyID &rootModuleID, ModuleDependenciesCache &cache,
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const llvm::sys::TimePoint<> &cacheTimeStamp, llvm::vfs::FileSystem &fs,
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DiagnosticEngine &diags, bool emitRemarks = false);
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/// Perform a postorder DFS to locate modules whose build recipe is out-of-date
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/// with respect to their inputs. Upon encountering such a module, add it to the
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/// set of invalidated modules, along with the path from the root to this
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/// module.
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void outOfDateModuleScan(const ModuleDependencyID &sourceModuleID,
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const ModuleDependenciesCache &cache,
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const llvm::sys::TimePoint<> &cacheTimeStamp,
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llvm::vfs::FileSystem &fs, DiagnosticEngine &diags,
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bool emitRemarks, ModuleDependencyIDSet &visited,
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ModuleDependencyIDSet &modulesRequiringRescan);
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/// Validate whether all inputs of a given module dependency
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/// are older than the cache serialization time.
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bool verifyModuleDependencyUpToDate(
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const ModuleDependencyID &moduleID, const ModuleDependenciesCache &cache,
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const llvm::sys::TimePoint<> &cacheTimeStamp, llvm::vfs::FileSystem &fs,
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DiagnosticEngine &diags, bool emitRemarks);
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} // end namespace incremental
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} // end namespace dependencies
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} // end namespace swift
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#endif
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