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
createInvocationFromCommandLine(ArrayRef<const char * > ArgList,IntrusiveRefCntPtr<DiagnosticsEngine> Diags,IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS,bool ShouldRecoverOnErorrs,std::vector<std::string> * CC1Args)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 if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
83 (Jobs.size() > 1 && !OffloadCompilation)) {
84 SmallString<256> Msg;
85 llvm::raw_svector_ostream OS(Msg);
86 Jobs.Print(OS, "; ", true);
87 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
88 return nullptr;
89 }
90
91 const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
92 if (StringRef(Cmd.getCreator().getName()) != "clang") {
93 Diags->Report(diag::err_fe_expected_clang_command);
94 return nullptr;
95 }
96
97 const ArgStringList &CCArgs = Cmd.getArguments();
98 if (CC1Args)
99 *CC1Args = {CCArgs.begin(), CCArgs.end()};
100 auto CI = std::make_unique<CompilerInvocation>();
101 if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags, Args[0]) &&
102 !ShouldRecoverOnErorrs)
103 return nullptr;
104 return CI;
105 }
106