1 //===- Compilation.cpp - Compilation Task Implementation ------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #include "clang/Driver/Compilation.h"
10 #include "clang/Basic/LLVM.h"
11 #include "clang/Driver/Action.h"
12 #include "clang/Driver/Driver.h"
13 #include "clang/Driver/DriverDiagnostic.h"
14 #include "clang/Driver/Job.h"
15 #include "clang/Driver/Options.h"
16 #include "clang/Driver/ToolChain.h"
17 #include "clang/Driver/Util.h"
18 #include "llvm/ADT/None.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/Triple.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/Option/OptSpecifier.h"
24 #include "llvm/Option/Option.h"
25 #include "llvm/Support/FileSystem.h"
26 #include "llvm/Support/raw_ostream.h"
29 #include <system_error>
32 using namespace clang;
33 using namespace driver;
34 using namespace llvm::opt;
36 Compilation::Compilation(const Driver &D, const ToolChain &_DefaultToolChain,
37 InputArgList *_Args, DerivedArgList *_TranslatedArgs,
39 : TheDriver(D), DefaultToolChain(_DefaultToolChain), Args(_Args),
40 TranslatedArgs(_TranslatedArgs), ContainsError(ContainsError) {
41 // The offloading host toolchain is the default toolchain.
42 OrderedOffloadingToolchains.insert(
43 std::make_pair(Action::OFK_Host, &DefaultToolChain));
46 Compilation::~Compilation() {
47 // Remove temporary files. This must be done before arguments are freed, as
48 // the file names might be derived from the input arguments.
49 if (!TheDriver.isSaveTempsEnabled() && !ForceKeepTempFiles)
50 CleanupFileList(TempFiles);
52 delete TranslatedArgs;
55 // Free any derived arg lists.
56 for (auto Arg : TCArgs)
57 if (Arg.second != TranslatedArgs)
61 const DerivedArgList &
62 Compilation::getArgsForToolChain(const ToolChain *TC, StringRef BoundArch,
63 Action::OffloadKind DeviceOffloadKind) {
65 TC = &DefaultToolChain;
67 DerivedArgList *&Entry = TCArgs[{TC, BoundArch, DeviceOffloadKind}];
69 SmallVector<Arg *, 4> AllocatedArgs;
70 DerivedArgList *OpenMPArgs = nullptr;
71 // Translate OpenMP toolchain arguments provided via the -Xopenmp-target flags.
72 if (DeviceOffloadKind == Action::OFK_OpenMP) {
73 const ToolChain *HostTC = getSingleOffloadToolChain<Action::OFK_Host>();
74 bool SameTripleAsHost = (TC->getTriple() == HostTC->getTriple());
75 OpenMPArgs = TC->TranslateOpenMPTargetArgs(
76 *TranslatedArgs, SameTripleAsHost, AllocatedArgs);
80 Entry = TC->TranslateArgs(*TranslatedArgs, BoundArch, DeviceOffloadKind);
82 Entry = TranslatedArgs;
84 Entry = TC->TranslateArgs(*OpenMPArgs, BoundArch, DeviceOffloadKind);
91 // Add allocated arguments to the final DAL.
92 for (auto ArgPtr : AllocatedArgs)
93 Entry->AddSynthesizedArg(ArgPtr);
99 bool Compilation::CleanupFile(const char *File, bool IssueErrors) const {
100 // FIXME: Why are we trying to remove files that we have not created? For
101 // example we should only try to remove a temporary assembly file if
102 // "clang -cc1" succeed in writing it. Was this a workaround for when
103 // clang was writing directly to a .s file and sometimes leaving it behind
106 // FIXME: If this is necessary, we can still try to split
107 // llvm::sys::fs::remove into a removeFile and a removeDir and avoid the
108 // duplicated stat from is_regular_file.
110 // Don't try to remove files which we don't have write access to (but may be
111 // able to remove), or non-regular files. Underlying tools may have
112 // intentionally not overwritten them.
113 if (!llvm::sys::fs::can_write(File) || !llvm::sys::fs::is_regular_file(File))
116 if (std::error_code EC = llvm::sys::fs::remove(File)) {
117 // Failure is only failure if the file exists and is "regular". We checked
118 // for it being regular before, and llvm::sys::fs::remove ignores ENOENT,
119 // so we don't need to check again.
122 getDriver().Diag(diag::err_drv_unable_to_remove_file)
129 bool Compilation::CleanupFileList(const llvm::opt::ArgStringList &Files,
130 bool IssueErrors) const {
132 for (const auto &File: Files)
133 Success &= CleanupFile(File, IssueErrors);
137 bool Compilation::CleanupFileMap(const ArgStringMap &Files,
139 bool IssueErrors) const {
141 for (const auto &File : Files) {
142 // If specified, only delete the files associated with the JobAction.
143 // Otherwise, delete all files in the map.
144 if (JA && File.first != JA)
146 Success &= CleanupFile(File.second, IssueErrors);
151 int Compilation::ExecuteCommand(const Command &C,
152 const Command *&FailingCommand) const {
153 if ((getDriver().CCPrintOptions ||
154 getArgs().hasArg(options::OPT_v)) && !getDriver().CCGenDiagnostics) {
155 raw_ostream *OS = &llvm::errs();
156 std::unique_ptr<llvm::raw_fd_ostream> OwnedStream;
158 // Follow gcc implementation of CC_PRINT_OPTIONS; we could also cache the
160 if (getDriver().CCPrintOptions && getDriver().CCPrintOptionsFilename) {
162 OwnedStream.reset(new llvm::raw_fd_ostream(
163 getDriver().CCPrintOptionsFilename, EC,
164 llvm::sys::fs::F_Append | llvm::sys::fs::F_Text));
166 getDriver().Diag(diag::err_drv_cc_print_options_failure)
171 OS = OwnedStream.get();
174 if (getDriver().CCPrintOptions)
175 *OS << "[Logging clang options]";
177 C.Print(*OS, "\n", /*Quote=*/getDriver().CCPrintOptions);
181 bool ExecutionFailed;
182 int Res = C.Execute(Redirects, &Error, &ExecutionFailed);
183 if (!Error.empty()) {
184 assert(Res && "Error string set with 0 result code!");
185 getDriver().Diag(diag::err_drv_command_failure) << Error;
191 return ExecutionFailed ? 1 : Res;
194 using FailingCommandList = SmallVectorImpl<std::pair<int, const Command *>>;
196 static bool ActionFailed(const Action *A,
197 const FailingCommandList &FailingCommands) {
198 if (FailingCommands.empty())
201 // CUDA/HIP can have the same input source code compiled multiple times so do
202 // not compiled again if there are already failures. It is OK to abort the
203 // CUDA pipeline on errors.
204 if (A->isOffloading(Action::OFK_Cuda) || A->isOffloading(Action::OFK_HIP))
207 for (const auto &CI : FailingCommands)
208 if (A == &(CI.second->getSource()))
211 for (const auto *AI : A->inputs())
212 if (ActionFailed(AI, FailingCommands))
218 static bool InputsOk(const Command &C,
219 const FailingCommandList &FailingCommands) {
220 return !ActionFailed(&C.getSource(), FailingCommands);
223 void Compilation::ExecuteJobs(const JobList &Jobs,
224 FailingCommandList &FailingCommands) const {
225 // According to UNIX standard, driver need to continue compiling all the
226 // inputs on the command line even one of them failed.
227 // In all but CLMode, execute all the jobs unless the necessary inputs for the
228 // job is missing due to previous failures.
229 for (const auto &Job : Jobs) {
230 if (!InputsOk(Job, FailingCommands))
232 const Command *FailingCommand = nullptr;
233 if (int Res = ExecuteCommand(Job, FailingCommand)) {
234 FailingCommands.push_back(std::make_pair(Res, FailingCommand));
235 // Bail as soon as one command fails in cl driver mode.
236 if (TheDriver.IsCLMode())
242 void Compilation::initCompilationForDiagnostics() {
243 ForDiagnostics = true;
245 // Free actions and jobs.
250 // Remove temporary files.
251 if (!TheDriver.isSaveTempsEnabled() && !ForceKeepTempFiles)
252 CleanupFileList(TempFiles);
254 // Clear temporary/results file lists.
257 FailureResultFiles.clear();
259 // Remove any user specified output. Claim any unclaimed arguments, so as
260 // to avoid emitting warnings about unused args.
261 OptSpecifier OutputOpts[] = { options::OPT_o, options::OPT_MD,
263 for (unsigned i = 0, e = llvm::array_lengthof(OutputOpts); i != e; ++i) {
264 if (TranslatedArgs->hasArg(OutputOpts[i]))
265 TranslatedArgs->eraseArg(OutputOpts[i]);
267 TranslatedArgs->ClaimAllArgs();
269 // Redirect stdout/stderr to /dev/null.
270 Redirects = {None, {""}, {""}};
272 // Temporary files added by diagnostics should be kept.
273 ForceKeepTempFiles = true;
276 StringRef Compilation::getSysRoot() const {
277 return getDriver().SysRoot;
280 void Compilation::Redirect(ArrayRef<Optional<StringRef>> Redirects) {
281 this->Redirects = Redirects;