1 //===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Construct a compiler invocation object for command line driver arguments 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Basic/DiagnosticOptions.h" 14 #include "clang/Driver/Action.h" 15 #include "clang/Driver/Compilation.h" 16 #include "clang/Driver/Driver.h" 17 #include "clang/Driver/Options.h" 18 #include "clang/Driver/Tool.h" 19 #include "clang/Frontend/CompilerInstance.h" 20 #include "clang/Frontend/FrontendDiagnostic.h" 21 #include "clang/Frontend/Utils.h" 22 #include "llvm/ADT/STLExtras.h" 23 #include "llvm/ADT/StringRef.h" 24 #include "llvm/Option/ArgList.h" 25 #include "llvm/Support/VirtualFileSystem.h" 26 #include "llvm/TargetParser/Host.h" 27 using namespace clang; 28 using namespace llvm::opt; 29 30 std::unique_ptr<CompilerInvocation> 31 clang::createInvocation(ArrayRef<const char *> ArgList, 32 CreateInvocationOptions Opts) { 33 assert(!ArgList.empty()); 34 std::optional<DiagnosticOptions> LocalDiagOpts; 35 IntrusiveRefCntPtr<DiagnosticsEngine> Diags; 36 if (Opts.Diags) { 37 Diags = std::move(Opts.Diags); 38 } else { 39 LocalDiagOpts.emplace(); 40 Diags = CompilerInstance::createDiagnostics( 41 Opts.VFS ? *Opts.VFS : *llvm::vfs::getRealFileSystem(), *LocalDiagOpts); 42 } 43 44 SmallVector<const char *, 16> Args(ArgList); 45 46 // FIXME: Find a cleaner way to force the driver into restricted modes. 47 Args.insert( 48 llvm::find_if( 49 Args, [](const char *Elem) { return llvm::StringRef(Elem) == "--"; }), 50 "-fsyntax-only"); 51 52 // FIXME: We shouldn't have to pass in the path info. 53 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), *Diags, 54 "clang LLVM compiler", Opts.VFS); 55 56 // Don't check that inputs exist, they may have been remapped. 57 TheDriver.setCheckInputsExist(false); 58 TheDriver.setProbePrecompiled(Opts.ProbePrecompiled); 59 60 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 61 if (!C) 62 return nullptr; 63 64 if (C->getArgs().hasArg(driver::options::OPT_fdriver_only)) 65 return nullptr; 66 67 // Just print the cc1 options if -### was present. 68 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 69 C->getJobs().Print(llvm::errs(), "\n", true); 70 return nullptr; 71 } 72 73 // We expect to get back exactly one command job, if we didn't something 74 // failed. Offload compilation is an exception as it creates multiple jobs. If 75 // that's the case, we proceed with the first job. If caller needs a 76 // particular job, it should be controlled via options (e.g. 77 // --cuda-{host|device}-only for CUDA) passed to the driver. 78 const driver::JobList &Jobs = C->getJobs(); 79 bool OffloadCompilation = false; 80 if (Jobs.size() > 1) { 81 for (auto &A : C->getActions()){ 82 // On MacOSX real actions may end up being wrapped in BindArchAction 83 if (isa<driver::BindArchAction>(A)) 84 A = *A->input_begin(); 85 if (isa<driver::OffloadAction>(A)) { 86 OffloadCompilation = true; 87 break; 88 } 89 } 90 } 91 92 bool PickFirstOfMany = OffloadCompilation || Opts.RecoverOnError; 93 if (Jobs.size() == 0 || (Jobs.size() > 1 && !PickFirstOfMany)) { 94 SmallString<256> Msg; 95 llvm::raw_svector_ostream OS(Msg); 96 Jobs.Print(OS, "; ", true); 97 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 98 return nullptr; 99 } 100 auto Cmd = llvm::find_if(Jobs, [](const driver::Command &Cmd) { 101 return StringRef(Cmd.getCreator().getName()) == "clang"; 102 }); 103 if (Cmd == Jobs.end()) { 104 Diags->Report(diag::err_fe_expected_clang_command); 105 return nullptr; 106 } 107 108 const ArgStringList &CCArgs = Cmd->getArguments(); 109 if (Opts.CC1Args) 110 *Opts.CC1Args = {CCArgs.begin(), CCArgs.end()}; 111 auto CI = std::make_unique<CompilerInvocation>(); 112 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) && 113 !Opts.RecoverOnError) 114 return nullptr; 115 return CI; 116 } 117