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//===- Job.h - Commands to Execute ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_DRIVER_JOB_H
#define LLVM_CLANG_DRIVER_JOB_H
#include "clang/Basic/LLVM.h"
#include "clang/Driver/InputInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/Program.h"
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>
namespace clang {
namespace driver {
class Action;
class InputInfo;
class Tool;
struct CrashReportInfo {
StringRef Filename;
StringRef VFSPath;
CrashReportInfo(StringRef Filename, StringRef VFSPath)
: Filename(Filename), VFSPath(VFSPath) {}
};
// Encodes the kind of response file supported for a command invocation.
// Response files are necessary if the command line gets too large, requiring
// the arguments to be transferred to a file.
struct ResponseFileSupport {
enum ResponseFileKind {
// Provides full support for response files, which means we can transfer
// all tool input arguments to a file.
RF_Full,
// Input file names can live in a file, but flags can't. This is a special
// case for old versions of Apple's ld64.
RF_FileList,
// Does not support response files: all arguments must be passed via
// command line.
RF_None
};
/// The level of support for response files.
ResponseFileKind ResponseKind;
/// The encoding to use when writing response files on Windows. Ignored on
/// other host OSes.
///
/// Windows use cases: - GCC and Binutils on mingw only accept ANSI response
/// files encoded with the system current code page.
/// - MSVC's CL.exe and LINK.exe accept UTF16 on Windows.
/// - Clang accepts both UTF8 and UTF16.
///
/// FIXME: When GNU tools learn how to parse UTF16 on Windows, we should
/// always use UTF16 for Windows, which is the Windows official encoding for
/// international characters.
llvm::sys::WindowsEncodingMethod ResponseEncoding;
/// What prefix to use for the command-line argument when passing a response
/// file.
const char *ResponseFlag;
/// Returns a ResponseFileSupport indicating that response files are not
/// supported.
static constexpr ResponseFileSupport None() {
return {RF_None, llvm::sys::WEM_UTF8, nullptr};
}
/// Returns a ResponseFileSupport indicating that response files are
/// supported, using the @file syntax. On windows, the file is written in the
/// UTF8 encoding. On other OSes, no re-encoding occurs.
static constexpr ResponseFileSupport AtFileUTF8() {
return {RF_Full, llvm::sys::WEM_UTF8, "@"};
}
/// Returns a ResponseFileSupport indicating that response files are
/// supported, using the @file syntax. On windows, the file is written in the
/// current ANSI code-page encoding. On other OSes, no re-encoding occurs.
static constexpr ResponseFileSupport AtFileCurCP() {
return {RF_Full, llvm::sys::WEM_CurrentCodePage, "@"};
}
/// Returns a ResponseFileSupport indicating that response files are
/// supported, using the @file syntax. On windows, the file is written in the
/// UTF-16 encoding. On other OSes, no re-encoding occurs.
static constexpr ResponseFileSupport AtFileUTF16() {
return {RF_Full, llvm::sys::WEM_UTF16, "@"};
}
};
/// Command - An executable path/name and argument vector to
/// execute.
class Command {
/// Source - The action which caused the creation of this job.
const Action &Source;
/// Tool - The tool which caused the creation of this job.
const Tool &Creator;
/// Whether and how to generate response files if the arguments are too long.
ResponseFileSupport ResponseSupport;
/// The executable to run.
const char *Executable;
/// Optional argument to prepend.
const char *PrependArg;
/// The list of program arguments (not including the implicit first
/// argument, which will be the executable).
llvm::opt::ArgStringList Arguments;
/// The list of program inputs.
std::vector<InputInfo> InputInfoList;
/// The list of program arguments which are outputs. May be empty.
std::vector<std::string> OutputFilenames;
/// Response file name, if this command is set to use one, or nullptr
/// otherwise
const char *ResponseFile = nullptr;
/// The input file list in case we need to emit a file list instead of a
/// proper response file
llvm::opt::ArgStringList InputFileList;
/// String storage if we need to create a new argument to specify a response
/// file
std::string ResponseFileFlag;
/// See Command::setEnvironment
std::vector<const char *> Environment;
/// Optional redirection for stdin, stdout, stderr.
std::vector<std::optional<std::string>> RedirectFiles;
/// Information on executable run provided by OS.
mutable std::optional<llvm::sys::ProcessStatistics> ProcStat;
/// When a response file is needed, we try to put most arguments in an
/// exclusive file, while others remains as regular command line arguments.
/// This functions fills a vector with the regular command line arguments,
/// argv, excluding the ones passed in a response file.
void buildArgvForResponseFile(llvm::SmallVectorImpl<const char *> &Out) const;
/// Encodes an array of C strings into a single string separated by whitespace.
/// This function will also put in quotes arguments that have whitespaces and
/// will escape the regular backslashes (used in Windows paths) and quotes.
/// The results are the contents of a response file, written into a raw_ostream.
void writeResponseFile(raw_ostream &OS) const;
public:
/// Whether to print the input filenames when executing.
bool PrintInputFilenames = false;
/// Whether the command will be executed in this process or not.
bool InProcess = false;
Command(const Action &Source, const Tool &Creator,
ResponseFileSupport ResponseSupport, const char *Executable,
const llvm::opt::ArgStringList &Arguments, ArrayRef<InputInfo> Inputs,
ArrayRef<InputInfo> Outputs = std::nullopt,
const char *PrependArg = nullptr);
// FIXME: This really shouldn't be copyable, but is currently copied in some
// error handling in Driver::generateCompilationDiagnostics.
Command(const Command &) = default;
virtual ~Command() = default;
virtual void Print(llvm::raw_ostream &OS, const char *Terminator, bool Quote,
CrashReportInfo *CrashInfo = nullptr) const;
virtual int Execute(ArrayRef<std::optional<StringRef>> Redirects,
std::string *ErrMsg, bool *ExecutionFailed) const;
/// getSource - Return the Action which caused the creation of this job.
const Action &getSource() const { return Source; }
/// getCreator - Return the Tool which caused the creation of this job.
const Tool &getCreator() const { return Creator; }
/// Returns the kind of response file supported by the current invocation.
const ResponseFileSupport &getResponseFileSupport() {
return ResponseSupport;
}
/// Set to pass arguments via a response file when launching the command
void setResponseFile(const char *FileName);
/// Set an input file list, necessary if you specified an RF_FileList response
/// file support.
void setInputFileList(llvm::opt::ArgStringList List) {
InputFileList = std::move(List);
}
/// Sets the environment to be used by the new process.
/// \param NewEnvironment An array of environment variables.
/// \remark If the environment remains unset, then the environment
/// from the parent process will be used.
virtual void setEnvironment(llvm::ArrayRef<const char *> NewEnvironment);
void
setRedirectFiles(const std::vector<std::optional<std::string>> &Redirects);
void replaceArguments(llvm::opt::ArgStringList List) {
Arguments = std::move(List);
}
void replaceExecutable(const char *Exe) { Executable = Exe; }
const char *getExecutable() const { return Executable; }
const llvm::opt::ArgStringList &getArguments() const { return Arguments; }
const std::vector<InputInfo> &getInputInfos() const { return InputInfoList; }
const std::vector<std::string> &getOutputFilenames() const {
return OutputFilenames;
}
std::optional<llvm::sys::ProcessStatistics> getProcessStatistics() const {
return ProcStat;
}
protected:
/// Optionally print the filenames to be compiled
void PrintFileNames() const;
};
/// Use the CC1 tool callback when available, to avoid creating a new process
class CC1Command : public Command {
public:
CC1Command(const Action &Source, const Tool &Creator,
ResponseFileSupport ResponseSupport, const char *Executable,
const llvm::opt::ArgStringList &Arguments,
ArrayRef<InputInfo> Inputs,
ArrayRef<InputInfo> Outputs = std::nullopt,
const char *PrependArg = nullptr);
void Print(llvm::raw_ostream &OS, const char *Terminator, bool Quote,
CrashReportInfo *CrashInfo = nullptr) const override;
int Execute(ArrayRef<std::optional<StringRef>> Redirects, std::string *ErrMsg,
bool *ExecutionFailed) const override;
void setEnvironment(llvm::ArrayRef<const char *> NewEnvironment) override;
};
/// JobList - A sequence of jobs to perform.
class JobList {
public:
using list_type = SmallVector<std::unique_ptr<Command>, 4>;
using size_type = list_type::size_type;
using iterator = llvm::pointee_iterator<list_type::iterator>;
using const_iterator = llvm::pointee_iterator<list_type::const_iterator>;
private:
list_type Jobs;
public:
void Print(llvm::raw_ostream &OS, const char *Terminator,
bool Quote, CrashReportInfo *CrashInfo = nullptr) const;
/// Add a job to the list (taking ownership).
void addJob(std::unique_ptr<Command> J) { Jobs.push_back(std::move(J)); }
/// Clear the job list.
void clear();
const list_type &getJobs() const { return Jobs; }
bool empty() const { return Jobs.empty(); }
size_type size() const { return Jobs.size(); }
iterator begin() { return Jobs.begin(); }
const_iterator begin() const { return Jobs.begin(); }
iterator end() { return Jobs.end(); }
const_iterator end() const { return Jobs.end(); }
};
} // namespace driver
} // namespace clang
#endif // LLVM_CLANG_DRIVER_JOB_H
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