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//===--------------- GenericUnixToolchain.swift - Swift *nix Toolchain ----===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 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 protocol TSCBasic.FileSystem
import struct TSCBasic.AbsolutePath
import var TSCBasic.localFileSystem
internal enum AndroidNDK {
internal static func getOSName() -> String? {
// The NDK is only available on macOS, linux and windows hosts currently.
#if os(Windows)
"windows"
#elseif os(Linux)
"linux"
#elseif os(macOS)
"darwin"
#else
nil
#endif
}
internal static func getDefaultSysrootPath(in env: [String:String]) -> AbsolutePath? {
// The NDK is only available on an x86_64 hosts currently.
#if arch(x86_64)
guard let ndk = env["ANDROID_NDK_ROOT"], let os = getOSName() else { return nil }
return try? AbsolutePath(validating: ndk)
.appending(components: "toolchains", "llvm", "prebuilt")
.appending(component: "\(os)-x86_64")
.appending(component: "sysroot")
#else
return nil
#endif
}
}
/// Toolchain for Unix-like systems.
public final class GenericUnixToolchain: Toolchain {
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]()
// An externally provided path from where we should find compiler
public let compilerExecutableDir: AbsolutePath?
public let toolDirectory: AbsolutePath?
public let dummyForTestingObjectFormat = Triple.ObjectFormat.elf
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: return "lib\(moduleName).so"
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(nil):
return try lookup(executable: "ar")
case .staticLinker(.llvmFull),
.staticLinker(.llvmThin):
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 {
let environment = (targetTriple.environment == .android) ? "-android" : ""
return "libclang_rt.\(sanitizer.libraryName)-\(targetTriple.archName)\(environment).a"
}
public func addPlatformSpecificCommonFrontendOptions(
commandLine: inout [Job.ArgTemplate],
inputs: inout [TypedVirtualPath],
frontendTargetInfo: FrontendTargetInfo,
driver: inout Driver,
skipMacroOptions: Bool
) throws {
if let sysroot = driver.parsedOptions.getLastArgument(.sysroot)?.asSingle {
commandLine.appendFlag("-sysroot")
try commandLine.appendPath(VirtualPath(path: sysroot))
} else if driver.targetTriple.environment == .android,
let sysroot = AndroidNDK.getDefaultSysrootPath(in: self.env)
{
commandLine.appendFlag("-sysroot")
try commandLine.appendPath(VirtualPath(path: sysroot.pathString))
}
if driver.targetTriple.os == .openbsd && driver.targetTriple.arch == .aarch64 {
if frontendTargetInfo.target.openbsdBTCFIEnabled ?? false {
commandLine.appendFlag(.Xcc)
commandLine.appendFlag("-Xclang=-msign-return-address=non-leaf")
commandLine.appendFlag(.Xcc)
commandLine.appendFlag("-Xclang=-msign-return-address-key=a_key")
commandLine.appendFlag(.Xcc)
commandLine.appendFlag("-Xclang=-mbranch-target-enforce")
}
}
}
}
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