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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184806 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
4.6 KiB
C++
102 lines
4.6 KiB
C++
//===- llvm/Support/Program.h ------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the llvm::sys::Program class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_PROGRAM_H
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#define LLVM_SUPPORT_PROGRAM_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/system_error.h"
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namespace llvm {
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class error_code;
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namespace sys {
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/// This is the OS-specific separator for PATH like environment variables:
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// a colon on Unix or a semicolon on Windows.
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#if defined(LLVM_ON_UNIX)
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const char EnvPathSeparator = ':';
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#elif defined (LLVM_ON_WIN32)
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const char EnvPathSeparator = ';';
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#endif
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/// This static constructor (factory) will attempt to locate a program in
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/// the operating system's file system using some pre-determined set of
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/// locations to search (e.g. the PATH on Unix). Paths with slashes are
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/// returned unmodified.
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/// @returns A Path object initialized to the path of the program or a
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/// Path object that is empty (invalid) if the program could not be found.
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/// @brief Construct a Program by finding it by name.
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std::string FindProgramByName(const std::string& name);
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// These functions change the specified standard stream (stdin, stdout, or
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// stderr) to binary mode. They return errc::success if the specified stream
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// was changed. Otherwise a platform dependent error is returned.
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error_code ChangeStdinToBinary();
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error_code ChangeStdoutToBinary();
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error_code ChangeStderrToBinary();
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/// This function executes the program using the arguments provided. The
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/// invoked program will inherit the stdin, stdout, and stderr file
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/// descriptors, the environment and other configuration settings of the
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/// invoking program.
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/// This function waits the program to finish.
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/// @returns an integer result code indicating the status of the program.
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/// A zero or positive value indicates the result code of the program.
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/// -1 indicates failure to execute
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/// -2 indicates a crash during execution or timeout
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int ExecuteAndWait(
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StringRef Program, ///< Path of the program to be executed. It is
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/// presumed this is the result of the FindProgramByName method.
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const char **args, ///< A vector of strings that are passed to the
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///< program. The first element should be the name of the program.
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///< The list *must* be terminated by a null char* entry.
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const char **env = 0, ///< An optional vector of strings to use for
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///< the program's environment. If not provided, the current program's
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///< environment will be used.
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const StringRef **redirects = 0, ///< An optional array of pointers to
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///< paths. If the array is null, no redirection is done. The array
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///< should have a size of at least three. The inferior process's
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///< stdin(0), stdout(1), and stderr(2) will be redirected to the
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///< corresponding paths.
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///< When an empty path is passed in, the corresponding file
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///< descriptor will be disconnected (ie, /dev/null'd) in a portable
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///< way.
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unsigned secondsToWait = 0, ///< If non-zero, this specifies the amount
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///< of time to wait for the child process to exit. If the time
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///< expires, the child is killed and this call returns. If zero,
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///< this function will wait until the child finishes or forever if
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///< it doesn't.
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unsigned memoryLimit = 0, ///< If non-zero, this specifies max. amount
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///< of memory can be allocated by process. If memory usage will be
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///< higher limit, the child is killed and this call returns. If zero
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///< - no memory limit.
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std::string *ErrMsg = 0, ///< If non-zero, provides a pointer to a string
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///< instance in which error messages will be returned. If the string
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///< is non-empty upon return an error occurred while invoking the
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///< program.
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bool *ExecutionFailed = 0);
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/// Similar to ExecuteAndWait, but return immediately.
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void ExecuteNoWait(StringRef Program, const char **args, const char **env = 0,
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const StringRef **redirects = 0, unsigned memoryLimit = 0,
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std::string *ErrMsg = 0);
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// Return true if the given arguments fit within system-specific
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// argument length limits.
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bool argumentsFitWithinSystemLimits(ArrayRef<const char*> Args);
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}
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}
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#endif
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