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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
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
//===--- ToolChain.cpp - Collections of tools for one platform ------------===//
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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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#include "swift/Driver/ToolChain.h"
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#include "Tools.h"
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#include "swift/Driver/Tool.h"
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using namespace swift;
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using namespace swift::driver;
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using namespace llvm::opt;
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Tool *ToolChain::getSwift() const {
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if (!Swift)
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Swift.reset(new tools::Swift(*this));
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return Swift.get();
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}
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Tool *ToolChain::getMergeModule() const {
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if (!MergeModule)
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MergeModule.reset(new tools::MergeModule(*this));
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return MergeModule.get();
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}
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Tool *ToolChain::getLLDB() const {
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if (!LLDB)
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LLDB.reset(new tools::LLDB(*this));
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return LLDB.get();
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}
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Tool *ToolChain::getLinker() const {
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if (!Linker)
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Linker = buildLinker();
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return Linker.get();
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}
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Tool *ToolChain::selectTool(const JobAction &JA) const {
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switch (JA.getKind()) {
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case Action::CompileJob:
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return getSwift();
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case Action::MergeModuleJob:
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return getMergeModule();
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case Action::LinkJob:
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return getLinker();
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case Action::REPLJob:
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switch (cast<REPLJobAction>(JA).getRequestedMode()) {
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case REPLJobAction::Mode::Integrated:
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return getSwift();
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case REPLJobAction::Mode::RequireLLDB:
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return getLLDB();
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case REPLJobAction::Mode::PreferLLDB:
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if (static_cast<tools::LLDB *>(getLLDB())->isPresentRelativeToDriver())
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return getLLDB();
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return getSwift();
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}
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case Action::Input:
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llvm_unreachable("Invalid tool kind.");
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}
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llvm_unreachable("Invalid tool kind.");
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}
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types::ID ToolChain::lookupTypeForExtension(StringRef Ext) const {
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return types::lookupTypeForExtension(Ext);
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}
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