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1 //===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // Construct a compiler invocation object for command line driver arguments
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "clang/Frontend/Utils.h"
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14 #include "clang/Basic/DiagnosticOptions.h"
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15 #include "clang/Driver/Compilation.h"
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16 #include "clang/Driver/Driver.h"
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17 #include "clang/Driver/Action.h"
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18 #include "clang/Driver/Options.h"
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19 #include "clang/Driver/Tool.h"
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20 #include "clang/Frontend/CompilerInstance.h"
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21 #include "clang/Frontend/FrontendDiagnostic.h"
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22 #include "llvm/Option/ArgList.h"
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23 #include "llvm/Support/Host.h"
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24 using namespace clang;
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25 using namespace llvm::opt;
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26
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27 std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine(
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28 ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
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29 IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS, bool ShouldRecoverOnErorrs,
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30 std::vector<std::string> *CC1Args) {
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31 if (!Diags.get()) {
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32 // No diagnostics engine was provided, so create our own diagnostics object
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33 // with the default options.
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34 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
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35 }
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36
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37 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end());
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38
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39 // FIXME: Find a cleaner way to force the driver into restricted modes.
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40 Args.push_back("-fsyntax-only");
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41
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42 // FIXME: We shouldn't have to pass in the path info.
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43 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(),
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44 *Diags, VFS);
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45
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46 // Don't check that inputs exist, they may have been remapped.
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47 TheDriver.setCheckInputsExist(false);
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48
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49 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
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50 if (!C)
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51 return nullptr;
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52
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53 // Just print the cc1 options if -### was present.
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54 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
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55 C->getJobs().Print(llvm::errs(), "\n", true);
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56 return nullptr;
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57 }
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58
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59 // We expect to get back exactly one command job, if we didn't something
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60 // failed. Offload compilation is an exception as it creates multiple jobs. If
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61 // that's the case, we proceed with the first job. If caller needs a
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62 // particular job, it should be controlled via options (e.g.
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63 // --cuda-{host|device}-only for CUDA) passed to the driver.
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64 const driver::JobList &Jobs = C->getJobs();
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65 bool OffloadCompilation = false;
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66 if (Jobs.size() > 1) {
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67 for (auto &A : C->getActions()){
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68 // On MacOSX real actions may end up being wrapped in BindArchAction
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69 if (isa<driver::BindArchAction>(A))
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70 A = *A->input_begin();
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71 if (isa<driver::OffloadAction>(A)) {
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72 OffloadCompilation = true;
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73 break;
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74 }
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75 }
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76 }
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77 if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
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78 (Jobs.size() > 1 && !OffloadCompilation)) {
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79 SmallString<256> Msg;
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80 llvm::raw_svector_ostream OS(Msg);
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81 Jobs.Print(OS, "; ", true);
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82 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
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83 return nullptr;
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84 }
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85
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86 const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
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87 if (StringRef(Cmd.getCreator().getName()) != "clang") {
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88 Diags->Report(diag::err_fe_expected_clang_command);
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89 return nullptr;
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90 }
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91
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92 const ArgStringList &CCArgs = Cmd.getArguments();
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93 if (CC1Args)
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94 *CC1Args = {CCArgs.begin(), CCArgs.end()};
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95 auto CI = std::make_unique<CompilerInvocation>();
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96 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags) &&
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97 !ShouldRecoverOnErorrs)
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98 return nullptr;
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99 return CI;
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100 }
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