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ef78e2811a
marked as erroneous This is important so that other parts of the compiler (e.g., AST verifier) are less strict about AST invariants. Alternatively, we could make sure to emit a diagnostic in the parser when we consume the code completion token, but chasing every place where we do it now (and remembering to do this in future) does not scale well. Fixes the crash in rdar://problem/16100914 Swift SVN r14865
345 lines
12 KiB
C++
345 lines
12 KiB
C++
//===-- Frontend.cpp - frontend utility methods ---------------------------===//
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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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//
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// This file contains utility methods for parsing and performing semantic
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// on modules.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Frontend/Frontend.h"
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#include "swift/Subsystems.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/DiagnosticsFrontend.h"
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#include "swift/AST/Module.h"
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#include "swift/Basic/SourceManager.h"
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#include "swift/Parse/DelayedParsingCallbacks.h"
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#include "swift/Parse/Lexer.h"
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#include "swift/SIL/SILModule.h"
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#include "swift/Serialization/SerializedModuleLoader.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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using namespace swift;
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void CompilerInstance::createSILModule() {
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assert(getMainModule());
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TheSILModule = SILModule::createEmptyModule(getMainModule());
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}
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void CompilerInstance::setTargetConfigurations(IRGenOptions &IRGenOpts,
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LangOptions &LangOpts) {
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llvm::Triple triple = llvm::Triple(IRGenOpts.Triple);
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// Set the "os" target configuration.
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if (triple.isMacOSX()) {
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LangOpts.TargetConfigOptions["os"] = "OSX";
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} else if (triple.isiOS()) {
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LangOpts.TargetConfigOptions["os"] = "iOS";
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} else {
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assert(false && "Unsupported target OS");
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}
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// Set the "arch" target configuration.
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switch (triple.getArch()) {
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case llvm::Triple::ArchType::arm:
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LangOpts.TargetConfigOptions["arch"] = "arm";
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break;
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case llvm::Triple::ArchType::x86:
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LangOpts.TargetConfigOptions["arch"] = "i386";
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break;
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case llvm::Triple::ArchType::x86_64:
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LangOpts.TargetConfigOptions["arch"] = "x86_64";
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break;
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default:
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// FIXME: Use `case llvm::Triple::arm64` when underlying LLVM is new enough
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if (StringRef("arm64") == llvm::Triple::getArchTypeName(triple.getArch()))
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LangOpts.TargetConfigOptions["arch"] = "arm64";
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break;
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llvm_unreachable("Unsupported target architecture");
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}
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}
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bool CompilerInstance::setup(const CompilerInvocation &Invok) {
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Invocation = Invok;
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// Honor -Xllvm.
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if (!Invok.getFrontendOptions().LLVMArgs.empty()) {
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llvm::SmallVector<const char *, 4> Args;
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Args.push_back("swift (LLVM option parsing)");
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for (unsigned i = 0, e = Invok.getFrontendOptions().LLVMArgs.size(); i != e;
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++i)
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Args.push_back(Invok.getFrontendOptions().LLVMArgs[i].c_str());
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Args.push_back(nullptr);
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llvm::cl::ParseCommandLineOptions(Args.size()-1, Args.data());
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}
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// Initialize the target build configuration settings ("os" and "arch").
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setTargetConfigurations(Invocation.getIRGenOptions(),
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Invocation.getLangOptions());
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Context.reset(new ASTContext(Invocation.getLangOptions(),
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Invocation.getSearchPathOptions(),
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SourceMgr, Diagnostics));
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if (Invocation.getFrontendOptions().EnableSourceImport) {
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bool immediate = Invocation.getFrontendOptions().actionIsImmediate();
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Context->addModuleLoader(SourceLoader::create(*Context, !immediate));
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}
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SML = SerializedModuleLoader::create(*Context);
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Context->addModuleLoader(SML);
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// Wire up the Clang importer. If the user has specified an SDK, use it.
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// Otherwise, we just keep it around as our interface to Clang's ABI
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// knowledge.
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auto ImporterCtor = swift::getClangImporterCtor();
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if (ImporterCtor) {
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auto clangImporter =
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ImporterCtor(*Context, Invocation.getTargetTriple(),
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Invocation.getClangImporterOptions());
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if (!clangImporter) {
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Diagnostics.diagnose(SourceLoc(), diag::error_clang_importer_create_fail);
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return true;
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}
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Context->addModuleLoader(clangImporter, /*isClang*/true);
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} else if (!Invocation.getSDKPath().empty()) {
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Diagnostics.diagnose(SourceLoc(),
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diag::error_clang_importer_not_linked_in);
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return true;
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}
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assert(Lexer::isIdentifier(Invocation.getModuleName()));
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auto CodeCompletePoint = Invocation.getCodeCompletionPoint();
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if (CodeCompletePoint.first) {
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auto MemBuf = CodeCompletePoint.first;
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// CompilerInvocation doesn't own the buffers, copy to a new buffer.
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unsigned CodeCompletionBufferID = SourceMgr.addMemBufferCopy(MemBuf);
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BufferIDs.push_back(CodeCompletionBufferID);
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SourceMgr.setCodeCompletionPoint(CodeCompletionBufferID,
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CodeCompletePoint.second);
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}
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bool MainMode = (Invocation.getInputKind() == SourceFileKind::Main);
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bool SILMode = (Invocation.getInputKind() == SourceFileKind::SIL);
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const Optional<SelectedInput> &PrimaryInput =
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Invocation.getFrontendOptions().PrimaryInput;
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// Add the memory buffers first, these will be associated with a filename
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// and they can replace the contents of an input filename.
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for (unsigned i = 0, e = Invocation.getInputBuffers().size(); i != e; ++i) {
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// CompilerInvocation doesn't own the buffers, copy to a new buffer.
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unsigned BufferID =
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SourceMgr.addMemBufferCopy(Invocation.getInputBuffers()[i]);
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BufferIDs.push_back(BufferID);
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if (SILMode)
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MainBufferID = BufferID;
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if (PrimaryInput && PrimaryInput->isBuffer() && PrimaryInput->Index == i)
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PrimaryBufferID = BufferID;
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}
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for (unsigned i = 0, e = Invocation.getInputFilenames().size(); i != e; ++i) {
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auto &File = Invocation.getInputFilenames()[i];
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// FIXME: Working with filenames is fragile, maybe use the real path
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// or have some kind of FileManager.
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using namespace llvm::sys::path;
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if (Optional<unsigned> ExistingBufferID =
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SourceMgr.getIDForBufferIdentifier(File)) {
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if (SILMode || (MainMode && filename(File) == "main.swift"))
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MainBufferID = ExistingBufferID.getValue();
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if (PrimaryInput && PrimaryInput->isFilename() &&
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PrimaryInput->Index == i)
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PrimaryBufferID = ExistingBufferID.getValue();
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continue; // replaced by a memory buffer.
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}
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// Open the input file.
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std::unique_ptr<llvm::MemoryBuffer> InputFile;
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if (llvm::error_code Err =
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llvm::MemoryBuffer::getFileOrSTDIN(File, InputFile)) {
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Diagnostics.diagnose(SourceLoc(), diag::error_open_input_file,
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File, Err.message());
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return true;
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}
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// Transfer ownership of the MemoryBuffer to the SourceMgr.
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unsigned BufferID = SourceMgr.addNewSourceBuffer(std::move(InputFile));
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BufferIDs.push_back(BufferID);
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if (SILMode || (MainMode && filename(File) == "main.swift"))
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MainBufferID = BufferID;
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if (PrimaryInput && PrimaryInput->isFilename() && PrimaryInput->Index == i)
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PrimaryBufferID = BufferID;
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}
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if (MainMode && MainBufferID == NO_SUCH_BUFFER && BufferIDs.size() == 1)
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MainBufferID = BufferIDs.front();
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return false;
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}
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void CompilerInstance::performParse() {
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const SourceFileKind Kind = Invocation.getInputKind();
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Identifier ID = Context->getIdentifier(Invocation.getModuleName());
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MainModule = Module::create(ID, *Context);
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Context->LoadedModules[ID.str()] = MainModule;
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if (Kind == SourceFileKind::SIL) {
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assert(BufferIDs.size() == 1);
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assert(MainBufferID != NO_SUCH_BUFFER);
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createSILModule();
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}
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if (Kind == SourceFileKind::REPL) {
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auto *SingleInputFile =
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new (*Context) SourceFile(*MainModule, Kind, {},
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Invocation.getParseStdlib());
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MainModule->addFile(*SingleInputFile);
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return;
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}
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std::unique_ptr<DelayedParsingCallbacks> DelayedCB;
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if (Invocation.isCodeCompletion()) {
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DelayedCB.reset(
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new CodeCompleteDelayedCallbacks(SourceMgr.getCodeCompletionLoc()));
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} else if (Invocation.isDelayedFunctionBodyParsing()) {
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DelayedCB.reset(new AlwaysDelayedCallbacks);
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}
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PersistentParserState PersistentState;
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// Make sure the main file is the first file in the module. This may only be
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// a source file, or it may be a SIL file, which requires pumping the parser.
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// We parse it last, though, to make sure that it can use decls from other
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// files in the module.
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if (MainBufferID != NO_SUCH_BUFFER) {
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assert(Kind == SourceFileKind::Main || Kind == SourceFileKind::SIL);
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if (Kind == SourceFileKind::Main)
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SourceMgr.setHashbangBufferID(MainBufferID);
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auto *SingleInputFile =
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new (*Context) SourceFile(*MainModule, Kind, MainBufferID,
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Invocation.getParseStdlib());
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MainModule->addFile(*SingleInputFile);
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if (MainBufferID == PrimaryBufferID)
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PrimarySourceFile = SingleInputFile;
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}
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bool hadLoadError = false;
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// Parse all the library files first.
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for (auto BufferID : BufferIDs) {
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if (BufferID == MainBufferID)
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continue;
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auto Buffer = SourceMgr->getMemoryBuffer(BufferID);
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if (SerializedModuleLoader::isSerializedAST(Buffer->getBuffer())) {
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std::unique_ptr<llvm::MemoryBuffer> Input(
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llvm::MemoryBuffer::getMemBuffer(Buffer->getBuffer(),
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Buffer->getBufferIdentifier(),
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false));
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if (!SML->loadAST(*MainModule, SourceLoc(), std::move(Input)))
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hadLoadError = true;
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continue;
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}
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auto *NextInput = new (*Context) SourceFile(*MainModule,
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SourceFileKind::Library,
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BufferID,
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Invocation.getParseStdlib());
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MainModule->addFile(*NextInput);
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if (BufferID == PrimaryBufferID)
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PrimarySourceFile = NextInput;
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bool Done;
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parseIntoSourceFile(*NextInput, BufferID, &Done, nullptr,
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&PersistentState, DelayedCB.get());
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assert(Done && "Parser returned early?");
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(void) Done;
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performNameBinding(*NextInput);
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}
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if (Invocation.isCodeCompletion()) {
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// When we are doing code completion, make sure to emit at least one
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// diagnostic, so that ASTContext is marked as erroneous. In this case
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// various parts of the compiler (for example, AST verifier) have less
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// strict assumptions about the AST.
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Diagnostics.diagnose(SourceLoc(), diag::error_doing_code_completion);
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}
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if (hadLoadError)
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return;
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// Parse the main file last.
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if (MainBufferID != NO_SUCH_BUFFER) {
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SourceFile &MainFile = MainModule->getMainSourceFile(Kind);
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SILParserState SILContext(TheSILModule.get());
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unsigned CurTUElem = 0;
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bool Done;
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do {
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// Pump the parser multiple times if necessary. It will return early
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// after parsing any top level code in a main module, or in SIL mode when
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// there are chunks of swift decls (e.g. imports and types) interspersed
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// with 'sil' definitions.
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parseIntoSourceFile(MainFile, MainFile.getBufferID().getValue(), &Done,
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TheSILModule ? &SILContext : nullptr,
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&PersistentState, DelayedCB.get());
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if (!Invocation.getParseOnly() && (PrimaryBufferID == NO_SUCH_BUFFER ||
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MainBufferID == PrimaryBufferID))
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performTypeChecking(MainFile, PersistentState.getTopLevelContext(),
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CurTUElem);
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CurTUElem = MainFile.Decls.size();
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} while (!Done);
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if (Invocation.getFrontendOptions().Playground)
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performPlaygroundTransform(MainFile);
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}
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if (!Invocation.getParseOnly()) {
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// Type-check each top-level input besides the main source file.
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for (auto File : MainModule->getFiles())
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if (auto SF = dyn_cast<SourceFile>(File))
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if (PrimaryBufferID == NO_SUCH_BUFFER ||
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(SF->getBufferID().hasValue() &&
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SF->getBufferID().getValue() == PrimaryBufferID))
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performTypeChecking(*SF, PersistentState.getTopLevelContext());
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// Even if there were no source files, we should still record known
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// protocols.
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if (Context->getStdlibModule())
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Context->recordKnownProtocols(Context->getStdlibModule());
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}
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if (DelayedCB) {
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performDelayedParsing(MainModule, PersistentState,
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Invocation.getCodeCompletionFactory());
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}
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}
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