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Since LLDB is taking over as the REPL for Swift, we eventually want "swift" and "swift -repl" to invoke "lldb --repl" rather than the frontend. However, we only want to do this if the LLDB that's present is related to the Swift that's present -- we don't want to invoke some random LLDB on the system or in some other Xcode installation. Therefore, Swift searches for LLDB-- first next to the driver, then in the usr/bin/ outside of a toolchain-- before choosing to use it. If the user just passes -repl and an LLDB is not found relative to the driver, the existing "integrated" REPL will be launched instead.* If the user passes -lldb-repl and an LLDB is not found relative to the driver, one from the user's PATH will be chosen (like the linker). The user can also pass -integrated-repl to get the existing behavior. "swift -frontend -repl" always uses the integrated REPL. * Since LLDB's not quite ready to be the REPL yet, "swift -repl" still invokes the integrated REPL. "swift -repl -experimental-prefer-lldb" tests the new behavior; this option will become the default (and the flag removed) in <rdar://problem/16776719>. <rdar://problem/16776705> Swift SVN r17134
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
//===--- ToolChain.h - Collections of tools for one platform ----*- C++ -*-===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://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_DRIVER_TOOLCHAIN_H
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#define SWIFT_DRIVER_TOOLCHAIN_H
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#include "swift/Basic/LLVM.h"
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#include "swift/Driver/Action.h"
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#include "swift/Driver/Types.h"
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#include "llvm/ADT/Triple.h"
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#include <memory>
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namespace llvm {
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namespace opt {
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class ArgList;
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class DerivedArgList;
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class InputArgList;
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}
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}
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namespace swift {
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namespace driver {
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class Compilation;
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class Driver;
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class Tool;
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class ToolChain {
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const Driver &D;
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const llvm::Triple Triple;
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mutable std::unique_ptr<Tool> Swift;
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mutable std::unique_ptr<Tool> MergeModule;
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mutable std::unique_ptr<Tool> LLDB;
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mutable std::unique_ptr<Tool> Linker;
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Tool *getSwift() const;
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Tool *getMergeModule() const;
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Tool *getLLDB() const;
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Tool *getLinker() const;
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protected:
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ToolChain(const Driver &D, const llvm::Triple &T) : D(D), Triple(T) {}
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virtual std::unique_ptr<Tool> buildLinker() const = 0;
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public:
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virtual ~ToolChain() = default;
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// Accessors
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const Driver &getDriver() const { return D; }
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const llvm::Triple &getTriple() const { return Triple; }
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llvm::Triple::ArchType getArch() const { return Triple.getArch(); }
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StringRef getArchName() const { return Triple.getArchName(); }
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StringRef getPlatform() const { return Triple.getVendorName(); }
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StringRef getOS() const { return Triple.getOSName(); }
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std::string getTripleString() const { return Triple.getTriple(); }
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/// Choose a tool to use to handle the action \p JA.
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virtual Tool *selectTool(const JobAction &JA) const;
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// Platform defaults information
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/// Return the default langauge type to use for the given extension.
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virtual types::ID lookupTypeForExtension(StringRef Ext) const;
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};
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} // end namespace driver
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} // end namespace swift
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#endif
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