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/Frontend/Utils.h" 14 #include "clang/Basic/DiagnosticOptions.h" 15 #include "clang/Driver/Compilation.h" 16 #include "clang/Driver/Driver.h" 17 #include "clang/Driver/Action.h" 18 #include "clang/Driver/Options.h" 19 #include "clang/Driver/Tool.h" 20 #include "clang/Frontend/CompilerInstance.h" 21 #include "clang/Frontend/FrontendDiagnostic.h" 22 #include "llvm/Option/ArgList.h" 23 #include "llvm/Support/Host.h" 24 using namespace clang; 25 using namespace llvm::opt; 26 27 /// createInvocationFromCommandLine - Construct a compiler invocation object for 28 /// a command line argument vector. 29 /// 30 /// \return A CompilerInvocation, or 0 if none was built for the given 31 /// argument vector. 32 std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine( 33 ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags, 34 IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) { 35 if (!Diags.get()) { 36 // No diagnostics engine was provided, so create our own diagnostics object 37 // with the default options. 38 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 39 } 40 41 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end()); 42 43 // FIXME: Find a cleaner way to force the driver into restricted modes. 44 Args.push_back("-fsyntax-only"); 45 46 // FIXME: We shouldn't have to pass in the path info. 47 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(), 48 *Diags, VFS); 49 50 // Don't check that inputs exist, they may have been remapped. 51 TheDriver.setCheckInputsExist(false); 52 53 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 54 if (!C) 55 return nullptr; 56 57 // Just print the cc1 options if -### was present. 58 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 59 C->getJobs().Print(llvm::errs(), "\n", true); 60 return nullptr; 61 } 62 63 // We expect to get back exactly one command job, if we didn't something 64 // failed. Offload compilation is an exception as it creates multiple jobs. If 65 // that's the case, we proceed with the first job. If caller needs a 66 // particular job, it should be controlled via options (e.g. 67 // --cuda-{host|device}-only for CUDA) passed to the driver. 68 const driver::JobList &Jobs = C->getJobs(); 69 bool OffloadCompilation = false; 70 if (Jobs.size() > 1) { 71 for (auto &A : C->getActions()){ 72 // On MacOSX real actions may end up being wrapped in BindArchAction 73 if (isa<driver::BindArchAction>(A)) 74 A = *A->input_begin(); 75 if (isa<driver::OffloadAction>(A)) { 76 OffloadCompilation = true; 77 break; 78 } 79 } 80 } 81 if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) || 82 (Jobs.size() > 1 && !OffloadCompilation)) { 83 SmallString<256> Msg; 84 llvm::raw_svector_ostream OS(Msg); 85 Jobs.Print(OS, "; ", true); 86 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 87 return nullptr; 88 } 89 90 const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin()); 91 if (StringRef(Cmd.getCreator().getName()) != "clang") { 92 Diags->Report(diag::err_fe_expected_clang_command); 93 return nullptr; 94 } 95 96 const ArgStringList &CCArgs = Cmd.getArguments(); 97 auto CI = llvm::make_unique<CompilerInvocation>(); 98 if (!CompilerInvocation::CreateFromArgs(*CI, 99 const_cast<const char **>(CCArgs.data()), 100 const_cast<const char **>(CCArgs.data()) + 101 CCArgs.size(), 102 *Diags)) 103 return nullptr; 104 return CI; 105 } 106