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 assert(!ArgList.empty()); 34 if (!Diags.get()) { 35 // No diagnostics engine was provided, so create our own diagnostics object 36 // with the default options. 37 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 38 } 39 40 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end()); 41 42 // FIXME: Find a cleaner way to force the driver into restricted modes. 43 Args.insert( 44 llvm::find_if( 45 Args, [](const char *Elem) { return llvm::StringRef(Elem) == "--"; }), 46 "-fsyntax-only"); 47 48 // FIXME: We shouldn't have to pass in the path info. 49 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), *Diags, 50 "clang LLVM compiler", VFS); 51 52 // Don't check that inputs exist, they may have been remapped. 53 TheDriver.setCheckInputsExist(false); 54 55 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 56 if (!C) 57 return nullptr; 58 59 // Just print the cc1 options if -### was present. 60 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 61 C->getJobs().Print(llvm::errs(), "\n", true); 62 return nullptr; 63 } 64 65 // We expect to get back exactly one command job, if we didn't something 66 // failed. Offload compilation is an exception as it creates multiple jobs. If 67 // that's the case, we proceed with the first job. If caller needs a 68 // particular job, it should be controlled via options (e.g. 69 // --cuda-{host|device}-only for CUDA) passed to the driver. 70 const driver::JobList &Jobs = C->getJobs(); 71 bool OffloadCompilation = false; 72 if (Jobs.size() > 1) { 73 for (auto &A : C->getActions()){ 74 // On MacOSX real actions may end up being wrapped in BindArchAction 75 if (isa<driver::BindArchAction>(A)) 76 A = *A->input_begin(); 77 if (isa<driver::OffloadAction>(A)) { 78 OffloadCompilation = true; 79 break; 80 } 81 } 82 } 83 84 bool PickFirstOfMany = OffloadCompilation || ShouldRecoverOnErorrs; 85 if (Jobs.size() == 0 || (Jobs.size() > 1 && !PickFirstOfMany)) { 86 SmallString<256> Msg; 87 llvm::raw_svector_ostream OS(Msg); 88 Jobs.Print(OS, "; ", true); 89 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 90 return nullptr; 91 } 92 auto Cmd = llvm::find_if(Jobs, [](const driver::Command &Cmd) { 93 return StringRef(Cmd.getCreator().getName()) == "clang"; 94 }); 95 if (Cmd == Jobs.end()) { 96 Diags->Report(diag::err_fe_expected_clang_command); 97 return nullptr; 98 } 99 100 const ArgStringList &CCArgs = Cmd->getArguments(); 101 if (CC1Args) 102 *CC1Args = {CCArgs.begin(), CCArgs.end()}; 103 auto CI = std::make_unique<CompilerInvocation>(); 104 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) && 105 !ShouldRecoverOnErorrs) 106 return nullptr; 107 return CI; 108 } 109