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//===-------- WebAssemblyToolchain.swift - Swift Wasm Toolchain -----------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import SwiftOptions
import struct TSCBasic.AbsolutePath
import protocol TSCBasic.DiagnosticData
import protocol TSCBasic.FileSystem
import var TSCBasic.localFileSystem
/// Toolchain for WebAssembly-based systems.
public final class WebAssemblyToolchain: Toolchain {
@_spi(Testing) public enum Error: Swift.Error, DiagnosticData {
case interactiveModeUnsupportedForTarget(String)
case dynamicLibrariesUnsupportedForTarget(String)
case sanitizersUnsupportedForTarget(String)
case profilingUnsupportedForTarget(String)
case missingExternalDependency(String)
public var description: String {
switch self {
case .interactiveModeUnsupportedForTarget(let triple):
return "interactive mode is unsupported for target '\(triple)'; use 'swiftc' instead"
case .dynamicLibrariesUnsupportedForTarget(let triple):
return "dynamic libraries are unsupported for target '\(triple)'"
case .sanitizersUnsupportedForTarget(let triple):
return "sanitizers are unsupported for target '\(triple)'"
case .profilingUnsupportedForTarget(let triple):
return "profiling is unsupported for target '\(triple)'"
case .missingExternalDependency(let dependency):
return "missing external dependency '\(dependency)'"
}
}
}
public let env: [String: String]
/// The executor used to run processes used to find tools and retrieve target info.
public let executor: DriverExecutor
/// The file system to use for queries.
public let fileSystem: FileSystem
/// Doubles as path cache and point for overriding normal lookup
private var toolPaths = [Tool: AbsolutePath]()
public let compilerExecutableDir: AbsolutePath?
public let toolDirectory: AbsolutePath?
public let dummyForTestingObjectFormat = Triple.ObjectFormat.wasm
public init(env: [String: String], executor: DriverExecutor, fileSystem: FileSystem = localFileSystem, compilerExecutableDir: AbsolutePath? = nil, toolDirectory: AbsolutePath? = nil) {
self.env = env
self.executor = executor
self.fileSystem = fileSystem
self.compilerExecutableDir = compilerExecutableDir
self.toolDirectory = toolDirectory
}
public func makeLinkerOutputFilename(moduleName: String, type: LinkOutputType) -> String {
switch type {
case .executable:
return moduleName
case .dynamicLibrary:
// Wasm doesn't support dynamic libraries yet, but we'll report the error later.
return ""
case .staticLibrary:
return "lib\(moduleName).a"
}
}
/// Retrieve the absolute path for a given tool.
public func getToolPath(_ tool: Tool) throws -> AbsolutePath {
// Check the cache
if let toolPath = toolPaths[tool] {
return toolPath
}
let path = try lookupToolPath(tool)
// Cache the path
toolPaths[tool] = path
return path
}
private func lookupToolPath(_ tool: Tool) throws -> AbsolutePath {
switch tool {
case .swiftCompiler:
return try lookup(executable: "swift-frontend")
case .staticLinker:
return try lookup(executable: "llvm-ar")
case .dynamicLinker:
// FIXME: This needs to look in the tools_directory first.
return try lookup(executable: "clang")
case .clang:
return try lookup(executable: "clang")
case .clangxx:
return try lookup(executable: "clang++")
case .swiftAutolinkExtract:
return try lookup(executable: "swift-autolink-extract")
case .dsymutil:
return try lookup(executable: "dsymutil")
case .lldb:
return try lookup(executable: "lldb")
case .dwarfdump:
return try lookup(executable: "dwarfdump")
case .swiftHelp:
return try lookup(executable: "swift-help")
case .swiftAPIDigester:
return try lookup(executable: "swift-api-digester")
}
}
public func overrideToolPath(_ tool: Tool, path: AbsolutePath) {
toolPaths[tool] = path
}
public func clearKnownToolPath(_ tool: Tool) {
toolPaths.removeValue(forKey: tool)
}
public func defaultSDKPath(_ target: Triple?) throws -> AbsolutePath? {
return nil
}
public var shouldStoreInvocationInDebugInfo: Bool { false }
public var globalDebugPathRemapping: String? { nil }
public func runtimeLibraryName(
for sanitizer: Sanitizer,
targetTriple: Triple,
isShared: Bool
) throws -> String {
throw Error.sanitizersUnsupportedForTarget(targetTriple.triple)
}
public func platformSpecificInterpreterEnvironmentVariables(env: [String : String],
parsedOptions: inout ParsedOptions,
sdkPath: VirtualPath.Handle?,
targetInfo: FrontendTargetInfo) throws -> [String : String] {
throw Error.interactiveModeUnsupportedForTarget(targetInfo.target.triple.triple)
}
}
|
