062f6fe324
Projects like libc use mutually exclusive macros to compile files multiple times and then merge the result into the final library. For installapi to accept these, we'd need to parse the same declarations in different ways. This patch adds the basic pipelining for installapi to create the correct TBD file. * -Xproject allows: -fmodules, -fobjc-arc, fvisibility=hidden, prefix headers * -Xlabel allows: -D and -U settings * Error on 'private' and 'public' labels -X<label> * Xplatform allows: -iframework <path> This is to support the case where zippered frameworks want to pass in iOSSupport search path.
209 lines
8.2 KiB
C++
209 lines
8.2 KiB
C++
//===-- ClangInstallAPI.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to clang-installapi; it is a wrapper
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// for functionality in the InstallAPI clang library.
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//
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//===----------------------------------------------------------------------===//
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#include "Options.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/DiagnosticFrontend.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "clang/Driver/Tool.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/InstallAPI/Frontend.h"
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#include "clang/InstallAPI/FrontendRecords.h"
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#include "clang/InstallAPI/InstallAPIDiagnostic.h"
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#include "clang/InstallAPI/MachO.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/LLVMDriver.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/TargetParser/Host.h"
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#include <memory>
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using namespace clang;
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using namespace clang::installapi;
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using namespace clang::driver::options;
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using namespace llvm::opt;
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using namespace llvm::MachO;
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static bool runFrontend(StringRef ProgName, Twine Label, bool Verbose,
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InstallAPIContext &Ctx,
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llvm::vfs::InMemoryFileSystem *FS,
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const ArrayRef<std::string> InitialArgs) {
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std::unique_ptr<llvm::MemoryBuffer> ProcessedInput = createInputBuffer(Ctx);
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// Skip invoking cc1 when there are no header inputs.
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if (!ProcessedInput)
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return true;
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if (Verbose)
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llvm::errs() << Label << " Headers:\n"
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<< ProcessedInput->getBuffer() << "\n\n";
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std::string InputFile = ProcessedInput->getBufferIdentifier().str();
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FS->addFile(InputFile, /*ModTime=*/0, std::move(ProcessedInput));
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// Reconstruct arguments with unique values like target triple or input
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// headers.
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std::vector<std::string> Args = {ProgName.data(), "-target",
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Ctx.Slice->getTriple().str().c_str()};
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llvm::copy(InitialArgs, std::back_inserter(Args));
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Args.push_back(InputFile);
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// Create & run invocation.
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clang::tooling::ToolInvocation Invocation(
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std::move(Args), std::make_unique<InstallAPIAction>(Ctx), Ctx.FM);
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return Invocation.run();
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}
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static bool run(ArrayRef<const char *> Args, const char *ProgName) {
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// Setup Diagnostics engine.
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
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const llvm::opt::OptTable &ClangOpts = clang::driver::getDriverOptTable();
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unsigned MissingArgIndex, MissingArgCount;
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llvm::opt::InputArgList ParsedArgs = ClangOpts.ParseArgs(
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ArrayRef(Args).slice(1), MissingArgIndex, MissingArgCount);
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ParseDiagnosticArgs(*DiagOpts, ParsedArgs);
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IntrusiveRefCntPtr<DiagnosticsEngine> Diag = new clang::DiagnosticsEngine(
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new clang::DiagnosticIDs(), DiagOpts.get(),
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new clang::TextDiagnosticPrinter(llvm::errs(), DiagOpts.get()));
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// Create file manager for all file operations and holding in-memory generated
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// inputs.
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llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> OverlayFileSystem(
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new llvm::vfs::OverlayFileSystem(llvm::vfs::getRealFileSystem()));
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llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
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new llvm::vfs::InMemoryFileSystem);
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OverlayFileSystem->pushOverlay(InMemoryFileSystem);
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IntrusiveRefCntPtr<clang::FileManager> FM(
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new FileManager(clang::FileSystemOptions(), OverlayFileSystem));
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// Capture all options and diagnose any errors.
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Options Opts(*Diag, FM.get(), Args, ProgName);
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if (Diag->hasErrorOccurred())
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return EXIT_FAILURE;
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InstallAPIContext Ctx = Opts.createContext();
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if (Diag->hasErrorOccurred())
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return EXIT_FAILURE;
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if (!Opts.DriverOpts.DylibToVerify.empty()) {
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TargetList Targets;
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llvm::for_each(Opts.DriverOpts.Targets,
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[&](const auto &T) { Targets.push_back(T.first); });
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if (!Ctx.Verifier->verifyBinaryAttrs(Targets, Ctx.BA, Ctx.Reexports,
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Opts.LinkerOpts.AllowableClients,
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Opts.LinkerOpts.RPaths, Ctx.FT))
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return EXIT_FAILURE;
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};
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// Set up compilation.
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std::unique_ptr<CompilerInstance> CI(new CompilerInstance());
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CI->setFileManager(FM.get());
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CI->createDiagnostics();
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if (!CI->hasDiagnostics())
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return EXIT_FAILURE;
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// Execute, verify and gather AST results.
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// An invocation is ran for each unique target triple and for each header
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// access level.
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Records FrontendRecords;
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for (const auto &[Targ, Trip] : Opts.DriverOpts.Targets) {
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Ctx.Verifier->setTarget(Targ);
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Ctx.Slice = std::make_shared<FrontendRecordsSlice>(Trip);
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for (const HeaderType Type :
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{HeaderType::Public, HeaderType::Private, HeaderType::Project}) {
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std::vector<std::string> ArgStrings = Opts.getClangFrontendArgs();
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Opts.addConditionalCC1Args(ArgStrings, Trip, Type);
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Ctx.Type = Type;
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StringRef HeaderLabel = getName(Ctx.Type);
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if (!runFrontend(ProgName, HeaderLabel, Opts.DriverOpts.Verbose, Ctx,
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InMemoryFileSystem.get(), ArgStrings))
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return EXIT_FAILURE;
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// Run extra passes for unique compiler arguments.
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for (const auto &[Label, ExtraArgs] : Opts.FEOpts.UniqueArgs) {
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std::vector<std::string> FinalArguments = ArgStrings;
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llvm::append_range(FinalArguments, ExtraArgs);
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if (!runFrontend(ProgName, Label + " " + HeaderLabel,
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Opts.DriverOpts.Verbose, Ctx, InMemoryFileSystem.get(),
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FinalArguments))
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return EXIT_FAILURE;
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}
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}
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FrontendRecords.emplace_back(std::move(Ctx.Slice));
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}
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if (Ctx.Verifier->verifyRemainingSymbols() == DylibVerifier::Result::Invalid)
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return EXIT_FAILURE;
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// After symbols have been collected, prepare to write output.
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auto Out = CI->createOutputFile(Ctx.OutputLoc, /*Binary=*/false,
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/*RemoveFileOnSignal=*/false,
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/*UseTemporary=*/false,
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/*CreateMissingDirectories=*/false);
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if (!Out)
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return EXIT_FAILURE;
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// Assign attributes for serialization.
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InterfaceFile IF(Ctx.Verifier->takeExports());
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// Assign attributes that are the same per slice first.
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for (const auto &TargetInfo : Opts.DriverOpts.Targets) {
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IF.addTarget(TargetInfo.first);
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IF.setFromBinaryAttrs(Ctx.BA, TargetInfo.first);
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}
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// Then assign potentially different attributes per slice after.
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auto assignLibAttrs =
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[&IF](
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const auto &Attrs,
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std::function<void(InterfaceFile *, StringRef, const Target &)> Add) {
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for (const auto &Lib : Attrs)
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for (const auto &T : IF.targets(Lib.getValue()))
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Add(&IF, Lib.getKey(), T);
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};
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assignLibAttrs(Opts.LinkerOpts.AllowableClients,
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&InterfaceFile::addAllowableClient);
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assignLibAttrs(Opts.LinkerOpts.RPaths, &InterfaceFile::addRPath);
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assignLibAttrs(Ctx.Reexports, &InterfaceFile::addReexportedLibrary);
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// Write output file and perform CI cleanup.
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if (auto Err = TextAPIWriter::writeToStream(*Out, IF, Ctx.FT)) {
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Diag->Report(diag::err_cannot_write_file)
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<< Ctx.OutputLoc << std::move(Err);
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CI->clearOutputFiles(/*EraseFiles=*/true);
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return EXIT_FAILURE;
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}
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CI->clearOutputFiles(/*EraseFiles=*/false);
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return EXIT_SUCCESS;
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}
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int clang_installapi_main(int argc, char **argv,
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const llvm::ToolContext &ToolContext) {
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// Standard set up, so program fails gracefully.
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llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
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llvm::PrettyStackTraceProgram StackPrinter(argc, argv);
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llvm::llvm_shutdown_obj Shutdown;
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if (llvm::sys::Process::FixupStandardFileDescriptors())
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return EXIT_FAILURE;
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const char *ProgName =
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ToolContext.NeedsPrependArg ? ToolContext.PrependArg : ToolContext.Path;
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return run(llvm::ArrayRef(argv, argc), ProgName);
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}
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