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/Host.h" 26 using namespace clang; 27 using namespace llvm::opt; 28 29 std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine( 30 ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags, 31 IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS, bool ShouldRecoverOnErorrs, 32 std::vector<std::string> *CC1Args) { 33 if (!Diags.get()) { 34 // No diagnostics engine was provided, so create our own diagnostics object 35 // with the default options. 36 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 37 } 38 39 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end()); 40 41 // FIXME: Find a cleaner way to force the driver into restricted modes. 42 Args.insert( 43 llvm::find_if( 44 Args, [](const char *Elem) { return llvm::StringRef(Elem) == "--"; }), 45 "-fsyntax-only"); 46 47 // FIXME: We shouldn't have to pass in the path info. 48 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), *Diags, 49 "clang LLVM compiler", VFS); 50 51 // Don't check that inputs exist, they may have been remapped. 52 TheDriver.setCheckInputsExist(false); 53 54 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 55 if (!C) 56 return nullptr; 57 58 // Just print the cc1 options if -### was present. 59 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 60 C->getJobs().Print(llvm::errs(), "\n", true); 61 return nullptr; 62 } 63 64 // We expect to get back exactly one command job, if we didn't something 65 // failed. Offload compilation is an exception as it creates multiple jobs. If 66 // that's the case, we proceed with the first job. If caller needs a 67 // particular job, it should be controlled via options (e.g. 68 // --cuda-{host|device}-only for CUDA) passed to the driver. 69 const driver::JobList &Jobs = C->getJobs(); 70 bool OffloadCompilation = false; 71 if (Jobs.size() > 1) { 72 for (auto &A : C->getActions()){ 73 // On MacOSX real actions may end up being wrapped in BindArchAction 74 if (isa<driver::BindArchAction>(A)) 75 A = *A->input_begin(); 76 if (isa<driver::OffloadAction>(A)) { 77 OffloadCompilation = true; 78 break; 79 } 80 } 81 } 82 83 bool PickFirstOfMany = OffloadCompilation || ShouldRecoverOnErorrs; 84 if (Jobs.size() == 0 || (Jobs.size() > 1 && !PickFirstOfMany)) { 85 SmallString<256> Msg; 86 llvm::raw_svector_ostream OS(Msg); 87 Jobs.Print(OS, "; ", true); 88 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 89 return nullptr; 90 } 91 auto Cmd = llvm::find_if(Jobs, [](const driver::Command &Cmd) { 92 return StringRef(Cmd.getCreator().getName()) == "clang"; 93 }); 94 if (Cmd == Jobs.end()) { 95 Diags->Report(diag::err_fe_expected_clang_command); 96 return nullptr; 97 } 98 99 const ArgStringList &CCArgs = Cmd->getArguments(); 100 if (CC1Args) 101 *CC1Args = {CCArgs.begin(), CCArgs.end()}; 102 auto CI = std::make_unique<CompilerInvocation>(); 103 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) && 104 !ShouldRecoverOnErorrs) 105 return nullptr; 106 return CI; 107 } 108