X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FSystemUtils.cpp;h=2036364dc51d99a58e02615b5a8261bdf809be99;hb=b9536ac581d0d74b29c11dcb33e22200b22b86b1;hp=2538c0e3cdcfa612848109bc076851f7a9ed3188;hpb=9665e8a697d1fa91aeca17f13a81dd2de2f11aa5;p=oota-llvm.git diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp index 2538c0e3cdc..2036364dc51 100644 --- a/lib/Support/SystemUtils.cpp +++ b/lib/Support/SystemUtils.cpp @@ -1,10 +1,10 @@ //===- SystemUtils.cpp - Utilities for low-level system tasks -------------===// -// +// // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// //===----------------------------------------------------------------------===// // // This file contains functions used to do a variety of low-level, often @@ -13,225 +13,21 @@ //===----------------------------------------------------------------------===// #include "llvm/Support/SystemUtils.h" -#include "llvm/System/Program.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include +#include "llvm/Support/Process.h" +#include "llvm/Support/Program.h" +#include "llvm/Support/raw_ostream.h" using namespace llvm; -/// isStandardOutAConsole - Return true if we can tell that the standard output -/// stream goes to a terminal window or console. -bool llvm::isStandardOutAConsole() { -#if HAVE_ISATTY - return isatty(1); -#endif - // If we don't have isatty, just return false. - return false; -} - - -/// FindExecutable - Find a named executable, giving the argv[0] of program -/// being executed. This allows us to find another LLVM tool if it is built -/// into the same directory, but that directory is neither the current -/// directory, nor in the PATH. If the executable cannot be found, return an -/// empty string. -/// -#undef FindExecutable // needed on windows :( -sys::Path llvm::FindExecutable(const std::string &ExeName, - const std::string &ProgramPath) { - // First check the directory that the calling program is in. We can do this - // if ProgramPath contains at least one / character, indicating that it is a - // relative path to bugpoint itself. - // - sys::Path Result ( ProgramPath ); - Result.elideFile(); - - if (!Result.isEmpty()) { - Result.appendFile(ExeName); - if (Result.executable()) return Result; - } - - return sys::Program::FindProgramByName(ExeName); -} - -static void RedirectFD(const std::string &File, int FD) { - if (File.empty()) return; // Noop - - // Open the file - int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666); - if (InFD == -1) { - std::cerr << "Error opening file '" << File << "' for " - << (FD == 0 ? "input" : "output") << "!\n"; - exit(1); - } - - dup2(InFD, FD); // Install it as the requested FD - close(InFD); // Close the original FD -} - -static bool Timeout = false; -static void TimeOutHandler(int Sig) { - Timeout = true; -} - -/// RunProgramWithTimeout - This function executes the specified program, with -/// the specified null-terminated argument array, with the stdin/out/err fd's -/// redirected, with a timeout specified by the last argument. This terminates -/// the calling program if there is an error executing the specified program. -/// It returns the return value of the program, or -1 if a timeout is detected. -/// -int llvm::RunProgramWithTimeout(const std::string &ProgramPath, - const char **Args, - const std::string &StdInFile, - const std::string &StdOutFile, - const std::string &StdErrFile, - unsigned NumSeconds) { -#ifdef HAVE_SYS_WAIT_H - int Child = fork(); - switch (Child) { - case -1: - std::cerr << "ERROR forking!\n"; - exit(1); - case 0: // Child - RedirectFD(StdInFile, 0); // Redirect file descriptors... - RedirectFD(StdOutFile, 1); - if (StdOutFile != StdErrFile) - RedirectFD(StdErrFile, 2); - else - dup2(1, 2); - - execv(ProgramPath.c_str(), (char *const *)Args); - std::cerr << "Error executing program: '" << ProgramPath; - for (; *Args; ++Args) - std::cerr << " " << *Args; - std::cerr << "'\n"; - exit(1); - - default: break; - } - - // Make sure all output has been written while waiting - std::cout << std::flush; - - // Install a timeout handler. - Timeout = false; - struct sigaction Act, Old; - Act.sa_sigaction = 0; - Act.sa_handler = TimeOutHandler; - sigemptyset(&Act.sa_mask); - Act.sa_flags = 0; - sigaction(SIGALRM, &Act, &Old); - - // Set the timeout if one is set. - if (NumSeconds) - alarm(NumSeconds); - - int Status; - while (wait(&Status) != Child) - if (errno == EINTR) { - if (Timeout) { - // Kill the child. - kill(Child, SIGKILL); - - if (wait(&Status) != Child) - std::cerr << "Something funny happened waiting for the child!\n"; - - alarm(0); - sigaction(SIGALRM, &Old, 0); - return -1; // Timeout detected - } else { - std::cerr << "Error waiting for child process!\n"; - exit(1); - } +bool llvm::CheckBitcodeOutputToConsole(raw_ostream &stream_to_check, + bool print_warning) { + if (stream_to_check.is_displayed()) { + if (print_warning) { + errs() << "WARNING: You're attempting to print out a bitcode file.\n" + "This is inadvisable as it may cause display problems. If\n" + "you REALLY want to taste LLVM bitcode first-hand, you\n" + "can force output with the `-f' option.\n\n"; } - - alarm(0); - sigaction(SIGALRM, &Old, 0); - return Status; - -#else - std::cerr << "RunProgramWithTimeout not implemented on this platform!\n"; - return -1; -#endif -} - - -// ExecWait - executes a program with the specified arguments and environment. -// It then waits for the progarm to termiante and then returns to the caller. -// -// Inputs: -// argv - The arguments to the program as an array of C strings. The first -// argument should be the name of the program to execute, and the -// last argument should be a pointer to NULL. -// -// envp - The environment passes to the program as an array of C strings in -// the form of "name=value" pairs. The last element should be a -// pointer to NULL. -// -// Outputs: -// None. -// -// Return value: -// 0 - No errors. -// 1 - The program could not be executed. -// 1 - The program returned a non-zero exit status. -// 1 - The program terminated abnormally. -// -// Notes: -// The program will inherit the stdin, stdout, and stderr file descriptors -// as well as other various configuration settings (umask). -// -// This function should not print anything to stdout/stderr on its own. It is -// a generic library function. The caller or executed program should report -// errors in the way it sees fit. -// -// This function does not use $PATH to find programs. -// -int llvm::ExecWait(const char * const old_argv[], - const char * const old_envp[]) { -#ifdef HAVE_SYS_WAIT_H - // Create local versions of the parameters that can be passed into execve() - // without creating const problems. - char ** const argv = (char ** const) old_argv; - char ** const envp = (char ** const) old_envp; - - // Create a child process. - switch (fork()) { - // An error occured: Return to the caller. - case -1: - return 1; - break; - - // Child process: Execute the program. - case 0: - execve (argv[0], argv, envp); - // If the execve() failed, we should exit and let the parent pick up - // our non-zero exit status. - exit (1); - - // Parent process: Break out of the switch to do our processing. - default: - break; + return true; } - - // Parent process: Wait for the child process to terminate. - int status; - if ((wait (&status)) == -1) - return 1; - - // If the program exited normally with a zero exit status, return success! - if (WIFEXITED (status) && (WEXITSTATUS(status) == 0)) - return 0; -#else - std::cerr << "llvm::ExecWait not implemented on this platform!\n"; -#endif - - // Otherwise, return failure. - return 1; + return false; }