1 //===- Job.h - Commands to Execute ------------------------------*- C++ -*-===//
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 #ifndef LLVM_CLANG_DRIVER_JOB_H
10 #define LLVM_CLANG_DRIVER_JOB_H
12 #include "clang/Basic/LLVM.h"
13 #include "llvm/ADT/ArrayRef.h"
14 #include "llvm/ADT/Optional.h"
15 #include "llvm/ADT/SmallVector.h"
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/ADT/iterator.h"
18 #include "llvm/Option/Option.h"
31 struct CrashReportInfo {
35 CrashReportInfo(StringRef Filename, StringRef VFSPath)
36 : Filename(Filename), VFSPath(VFSPath) {}
39 /// Command - An executable path/name and argument vector to
42 /// Source - The action which caused the creation of this job.
45 /// Tool - The tool which caused the creation of this job.
48 /// The executable to run.
49 const char *Executable;
51 /// The list of program arguments (not including the implicit first
52 /// argument, which will be the executable).
53 llvm::opt::ArgStringList Arguments;
55 /// The list of program arguments which are inputs.
56 llvm::opt::ArgStringList InputFilenames;
58 /// Whether to print the input filenames when executing.
59 bool PrintInputFilenames = false;
61 /// Response file name, if this command is set to use one, or nullptr
63 const char *ResponseFile = nullptr;
65 /// The input file list in case we need to emit a file list instead of a
66 /// proper response file
67 llvm::opt::ArgStringList InputFileList;
69 /// String storage if we need to create a new argument to specify a response
71 std::string ResponseFileFlag;
73 /// See Command::setEnvironment
74 std::vector<const char *> Environment;
76 /// When a response file is needed, we try to put most arguments in an
77 /// exclusive file, while others remains as regular command line arguments.
78 /// This functions fills a vector with the regular command line arguments,
79 /// argv, excluding the ones passed in a response file.
80 void buildArgvForResponseFile(llvm::SmallVectorImpl<const char *> &Out) const;
82 /// Encodes an array of C strings into a single string separated by whitespace.
83 /// This function will also put in quotes arguments that have whitespaces and
84 /// will escape the regular backslashes (used in Windows paths) and quotes.
85 /// The results are the contents of a response file, written into a raw_ostream.
86 void writeResponseFile(raw_ostream &OS) const;
89 Command(const Action &Source, const Tool &Creator, const char *Executable,
90 const llvm::opt::ArgStringList &Arguments,
91 ArrayRef<InputInfo> Inputs);
92 // FIXME: This really shouldn't be copyable, but is currently copied in some
93 // error handling in Driver::generateCompilationDiagnostics.
94 Command(const Command &) = default;
95 virtual ~Command() = default;
97 virtual void Print(llvm::raw_ostream &OS, const char *Terminator, bool Quote,
98 CrashReportInfo *CrashInfo = nullptr) const;
100 virtual int Execute(ArrayRef<Optional<StringRef>> Redirects,
101 std::string *ErrMsg, bool *ExecutionFailed) const;
103 /// getSource - Return the Action which caused the creation of this job.
104 const Action &getSource() const { return Source; }
106 /// getCreator - Return the Tool which caused the creation of this job.
107 const Tool &getCreator() const { return Creator; }
109 /// Set to pass arguments via a response file when launching the command
110 void setResponseFile(const char *FileName);
112 /// Set an input file list, necessary if we need to use a response file but
113 /// the tool being called only supports input files lists.
114 void setInputFileList(llvm::opt::ArgStringList List) {
115 InputFileList = std::move(List);
118 /// Sets the environment to be used by the new process.
119 /// \param NewEnvironment An array of environment variables.
120 /// \remark If the environment remains unset, then the environment
121 /// from the parent process will be used.
122 void setEnvironment(llvm::ArrayRef<const char *> NewEnvironment);
124 const char *getExecutable() const { return Executable; }
126 const llvm::opt::ArgStringList &getArguments() const { return Arguments; }
128 /// Print a command argument, and optionally quote it.
129 static void printArg(llvm::raw_ostream &OS, StringRef Arg, bool Quote);
131 /// Set whether to print the input filenames when executing.
132 void setPrintInputFilenames(bool P) { PrintInputFilenames = P; }
135 /// Like Command, but with a fallback which is executed in case
136 /// the primary command crashes.
137 class FallbackCommand : public Command {
139 FallbackCommand(const Action &Source_, const Tool &Creator_,
140 const char *Executable_,
141 const llvm::opt::ArgStringList &Arguments_,
142 ArrayRef<InputInfo> Inputs,
143 std::unique_ptr<Command> Fallback_);
145 void Print(llvm::raw_ostream &OS, const char *Terminator, bool Quote,
146 CrashReportInfo *CrashInfo = nullptr) const override;
148 int Execute(ArrayRef<Optional<StringRef>> Redirects, std::string *ErrMsg,
149 bool *ExecutionFailed) const override;
152 std::unique_ptr<Command> Fallback;
155 /// Like Command, but always pretends that the wrapped command succeeded.
156 class ForceSuccessCommand : public Command {
158 ForceSuccessCommand(const Action &Source_, const Tool &Creator_,
159 const char *Executable_,
160 const llvm::opt::ArgStringList &Arguments_,
161 ArrayRef<InputInfo> Inputs);
163 void Print(llvm::raw_ostream &OS, const char *Terminator, bool Quote,
164 CrashReportInfo *CrashInfo = nullptr) const override;
166 int Execute(ArrayRef<Optional<StringRef>> Redirects, std::string *ErrMsg,
167 bool *ExecutionFailed) const override;
170 /// JobList - A sequence of jobs to perform.
173 using list_type = SmallVector<std::unique_ptr<Command>, 4>;
174 using size_type = list_type::size_type;
175 using iterator = llvm::pointee_iterator<list_type::iterator>;
176 using const_iterator = llvm::pointee_iterator<list_type::const_iterator>;
182 void Print(llvm::raw_ostream &OS, const char *Terminator,
183 bool Quote, CrashReportInfo *CrashInfo = nullptr) const;
185 /// Add a job to the list (taking ownership).
186 void addJob(std::unique_ptr<Command> J) { Jobs.push_back(std::move(J)); }
188 /// Clear the job list.
191 const list_type &getJobs() const { return Jobs; }
193 bool empty() const { return Jobs.empty(); }
194 size_type size() const { return Jobs.size(); }
195 iterator begin() { return Jobs.begin(); }
196 const_iterator begin() const { return Jobs.begin(); }
197 iterator end() { return Jobs.end(); }
198 const_iterator end() const { return Jobs.end(); }
201 } // namespace driver
204 #endif // LLVM_CLANG_DRIVER_JOB_H