1 files changed, 0 insertions, 500 deletions

diff --git a/contrib/llvm/lib/Support/Unix/Program.inc b/contrib/llvm/lib/Support/Unix/Program.inc
deleted file mode 100644
index c4123a64046f..000000000000
--- a/contrib/llvm/lib/Support/Unix/Program.inc
+++ /dev/null
@@ -1,500 +0,0 @@
-//===- llvm/Support/Unix/Program.cpp -----------------------------*- 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Unix specific portion of the Program class.
-//
-//===----------------------------------------------------------------------===//
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic UNIX code that
-//===          is guaranteed to work on *all* UNIX variants.
-//===----------------------------------------------------------------------===//
-
-#include "Unix.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/Config/config.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/Errc.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/StringSaver.h"
-#include "llvm/Support/raw_ostream.h"
-#if HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_SYS_RESOURCE_H
-#include <sys/resource.h>
-#endif
-#if HAVE_SIGNAL_H
-#include <signal.h>
-#endif
-#if HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#ifdef HAVE_POSIX_SPAWN
-#include <spawn.h>
-
-#if defined(__APPLE__)
-#include <TargetConditionals.h>
-#endif
-
-#if defined(__APPLE__) && !(defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
-#define USE_NSGETENVIRON 1
-#else
-#define USE_NSGETENVIRON 0
-#endif
-
-#if !USE_NSGETENVIRON
-  extern char **environ;
-#else
-#include <crt_externs.h> // _NSGetEnviron
-#endif
-#endif
-
-namespace llvm {
-
-using namespace sys;
-
-ProcessInfo::ProcessInfo() : Pid(0), ReturnCode(0) {}
-
-ErrorOr<std::string> sys::findProgramByName(StringRef Name,
-                                            ArrayRef<StringRef> Paths) {
-  assert(!Name.empty() && "Must have a name!");
-  // Use the given path verbatim if it contains any slashes; this matches
-  // the behavior of sh(1) and friends.
-  if (Name.find('/') != StringRef::npos)
-    return std::string(Name);
-
-  SmallVector<StringRef, 16> EnvironmentPaths;
-  if (Paths.empty())
-    if (const char *PathEnv = std::getenv("PATH")) {
-      SplitString(PathEnv, EnvironmentPaths, ":");
-      Paths = EnvironmentPaths;
-    }
-
-  for (auto Path : Paths) {
-    if (Path.empty())
-      continue;
-
-    // Check to see if this first directory contains the executable...
-    SmallString<128> FilePath(Path);
-    sys::path::append(FilePath, Name);
-    if (sys::fs::can_execute(FilePath.c_str()))
-      return std::string(FilePath.str()); // Found the executable!
-  }
-  return errc::no_such_file_or_directory;
-}
-
-static bool RedirectIO(Optional<StringRef> Path, int FD, std::string* ErrMsg) {
-  if (!Path) // Noop
-    return false;
-  std::string File;
-  if (Path->empty())
-    // Redirect empty paths to /dev/null
-    File = "/dev/null";
-  else
-    File = *Path;
-
-  // Open the file
-  int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
-  if (InFD == -1) {
-    MakeErrMsg(ErrMsg, "Cannot open file '" + File + "' for "
-              + (FD == 0 ? "input" : "output"));
-    return true;
-  }
-
-  // Install it as the requested FD
-  if (dup2(InFD, FD) == -1) {
-    MakeErrMsg(ErrMsg, "Cannot dup2");
-    close(InFD);
-    return true;
-  }
-  close(InFD);      // Close the original FD
-  return false;
-}
-
-#ifdef HAVE_POSIX_SPAWN
-static bool RedirectIO_PS(const std::string *Path, int FD, std::string *ErrMsg,
-                          posix_spawn_file_actions_t *FileActions) {
-  if (!Path) // Noop
-    return false;
-  const char *File;
-  if (Path->empty())
-    // Redirect empty paths to /dev/null
-    File = "/dev/null";
-  else
-    File = Path->c_str();
-
-  if (int Err = posix_spawn_file_actions_addopen(
-          FileActions, FD, File,
-          FD == 0 ? O_RDONLY : O_WRONLY | O_CREAT, 0666))
-    return MakeErrMsg(ErrMsg, "Cannot dup2", Err);
-  return false;
-}
-#endif
-
-static void TimeOutHandler(int Sig) {
-}
-
-static void SetMemoryLimits(unsigned size) {
-#if HAVE_SYS_RESOURCE_H && HAVE_GETRLIMIT && HAVE_SETRLIMIT
-  struct rlimit r;
-  __typeof__ (r.rlim_cur) limit = (__typeof__ (r.rlim_cur)) (size) * 1048576;
-
-  // Heap size
-  getrlimit (RLIMIT_DATA, &r);
-  r.rlim_cur = limit;
-  setrlimit (RLIMIT_DATA, &r);
-#ifdef RLIMIT_RSS
-  // Resident set size.
-  getrlimit (RLIMIT_RSS, &r);
-  r.rlim_cur = limit;
-  setrlimit (RLIMIT_RSS, &r);
-#endif
-#endif
-}
-
-}
-
-static std::vector<const char *>
-toNullTerminatedCStringArray(ArrayRef<StringRef> Strings, StringSaver &Saver) {
-  std::vector<const char *> Result;
-  for (StringRef S : Strings)
-    Result.push_back(Saver.save(S).data());
-  Result.push_back(nullptr);
-  return Result;
-}
-
-static bool Execute(ProcessInfo &PI, StringRef Program,
-                    ArrayRef<StringRef> Args, Optional<ArrayRef<StringRef>> Env,
-                    ArrayRef<Optional<StringRef>> Redirects,
-                    unsigned MemoryLimit, std::string *ErrMsg) {
-  if (!llvm::sys::fs::exists(Program)) {
-    if (ErrMsg)
-      *ErrMsg = std::string("Executable \"") + Program.str() +
-                std::string("\" doesn't exist!");
-    return false;
-  }
-
-  BumpPtrAllocator Allocator;
-  StringSaver Saver(Allocator);
-  std::vector<const char *> ArgVector, EnvVector;
-  const char **Argv = nullptr;
-  const char **Envp = nullptr;
-  ArgVector = toNullTerminatedCStringArray(Args, Saver);
-  Argv = ArgVector.data();
-  if (Env) {
-    EnvVector = toNullTerminatedCStringArray(*Env, Saver);
-    Envp = EnvVector.data();
-  }
-
-  // If this OS has posix_spawn and there is no memory limit being implied, use
-  // posix_spawn.  It is more efficient than fork/exec.
-#ifdef HAVE_POSIX_SPAWN
-  if (MemoryLimit == 0) {
-    posix_spawn_file_actions_t FileActionsStore;
-    posix_spawn_file_actions_t *FileActions = nullptr;
-
-    // If we call posix_spawn_file_actions_addopen we have to make sure the
-    // c strings we pass to it stay alive until the call to posix_spawn,
-    // so we copy any StringRefs into this variable.
-    std::string RedirectsStorage[3];
-
-    if (!Redirects.empty()) {
-      assert(Redirects.size() == 3);
-      std::string *RedirectsStr[3] = {nullptr, nullptr, nullptr};
-      for (int I = 0; I < 3; ++I) {
-        if (Redirects[I]) {
-          RedirectsStorage[I] = *Redirects[I];
-          RedirectsStr[I] = &RedirectsStorage[I];
-        }
-      }
-
-      FileActions = &FileActionsStore;
-      posix_spawn_file_actions_init(FileActions);
-
-      // Redirect stdin/stdout.
-      if (RedirectIO_PS(RedirectsStr[0], 0, ErrMsg, FileActions) ||
-          RedirectIO_PS(RedirectsStr[1], 1, ErrMsg, FileActions))
-        return false;
-      if (!Redirects[1] || !Redirects[2] || *Redirects[1] != *Redirects[2]) {
-        // Just redirect stderr
-        if (RedirectIO_PS(RedirectsStr[2], 2, ErrMsg, FileActions))
-          return false;
-      } else {
-        // If stdout and stderr should go to the same place, redirect stderr
-        // to the FD already open for stdout.
-        if (int Err = posix_spawn_file_actions_adddup2(FileActions, 1, 2))
-          return !MakeErrMsg(ErrMsg, "Can't redirect stderr to stdout", Err);
-      }
-    }
-
-    if (!Envp)
-#if !USE_NSGETENVIRON
-      Envp = const_cast<const char **>(environ);
-#else
-      // environ is missing in dylibs.
-      Envp = const_cast<const char **>(*_NSGetEnviron());
-#endif
-
-    constexpr int maxRetries = 8;
-    int retries = 0;
-    pid_t PID;
-    int Err;
-    do {
-      PID = 0; // Make Valgrind happy.
-      Err = posix_spawn(&PID, Program.str().c_str(), FileActions,
-                        /*attrp*/ nullptr, const_cast<char **>(Argv),
-                        const_cast<char **>(Envp));
-    } while (Err == EINTR && ++retries < maxRetries);
-
-    if (FileActions)
-      posix_spawn_file_actions_destroy(FileActions);
-
-    if (Err)
-     return !MakeErrMsg(ErrMsg, "posix_spawn failed", Err);
-
-    PI.Pid = PID;
-    PI.Process = PID;
-
-    return true;
-  }
-#endif
-
-  // Create a child process.
-  int child = fork();
-  switch (child) {
-    // An error occurred:  Return to the caller.
-    case -1:
-      MakeErrMsg(ErrMsg, "Couldn't fork");
-      return false;
-
-    // Child process: Execute the program.
-    case 0: {
-      // Redirect file descriptors...
-      if (!Redirects.empty()) {
-        // Redirect stdin
-        if (RedirectIO(Redirects[0], 0, ErrMsg)) { return false; }
-        // Redirect stdout
-        if (RedirectIO(Redirects[1], 1, ErrMsg)) { return false; }
-        if (Redirects[1] && Redirects[2] && *Redirects[1] == *Redirects[2]) {
-          // If stdout and stderr should go to the same place, redirect stderr
-          // to the FD already open for stdout.
-          if (-1 == dup2(1,2)) {
-            MakeErrMsg(ErrMsg, "Can't redirect stderr to stdout");
-            return false;
-          }
-        } else {
-          // Just redirect stderr
-          if (RedirectIO(Redirects[2], 2, ErrMsg)) { return false; }
-        }
-      }
-
-      // Set memory limits
-      if (MemoryLimit!=0) {
-        SetMemoryLimits(MemoryLimit);
-      }
-
-      // Execute!
-      std::string PathStr = Program;
-      if (Envp != nullptr)
-        execve(PathStr.c_str(), const_cast<char **>(Argv),
-               const_cast<char **>(Envp));
-      else
-        execv(PathStr.c_str(), const_cast<char **>(Argv));
-      // If the execve() failed, we should exit. Follow Unix protocol and
-      // return 127 if the executable was not found, and 126 otherwise.
-      // Use _exit rather than exit so that atexit functions and static
-      // object destructors cloned from the parent process aren't
-      // redundantly run, and so that any data buffered in stdio buffers
-      // cloned from the parent aren't redundantly written out.
-      _exit(errno == ENOENT ? 127 : 126);
-    }
-
-    // Parent process: Break out of the switch to do our processing.
-    default:
-      break;
-  }
-
-  PI.Pid = child;
-  PI.Process = child;
-
-  return true;
-}
-
-namespace llvm {
-
-ProcessInfo sys::Wait(const ProcessInfo &PI, unsigned SecondsToWait,
-                      bool WaitUntilTerminates, std::string *ErrMsg) {
-  struct sigaction Act, Old;
-  assert(PI.Pid && "invalid pid to wait on, process not started?");
-
-  int WaitPidOptions = 0;
-  pid_t ChildPid = PI.Pid;
-  if (WaitUntilTerminates) {
-    SecondsToWait = 0;
-  } else if (SecondsToWait) {
-    // Install a timeout handler.  The handler itself does nothing, but the
-    // simple fact of having a handler at all causes the wait below to return
-    // with EINTR, unlike if we used SIG_IGN.
-    memset(&Act, 0, sizeof(Act));
-    Act.sa_handler = TimeOutHandler;
-    sigemptyset(&Act.sa_mask);
-    sigaction(SIGALRM, &Act, &Old);
-    alarm(SecondsToWait);
-  } else if (SecondsToWait == 0)
-    WaitPidOptions = WNOHANG;
-
-  // Parent process: Wait for the child process to terminate.
-  int status;
-  ProcessInfo WaitResult;
-
-  do {
-    WaitResult.Pid = waitpid(ChildPid, &status, WaitPidOptions);
-  } while (WaitUntilTerminates && WaitResult.Pid == -1 && errno == EINTR);
-
-  if (WaitResult.Pid != PI.Pid) {
-    if (WaitResult.Pid == 0) {
-      // Non-blocking wait.
-      return WaitResult;
-    } else {
-      if (SecondsToWait && errno == EINTR) {
-        // Kill the child.
-        kill(PI.Pid, SIGKILL);
-
-        // Turn off the alarm and restore the signal handler
-        alarm(0);
-        sigaction(SIGALRM, &Old, nullptr);
-
-        // Wait for child to die
-        if (wait(&status) != ChildPid)
-          MakeErrMsg(ErrMsg, "Child timed out but wouldn't die");
-        else
-          MakeErrMsg(ErrMsg, "Child timed out", 0);
-
-        WaitResult.ReturnCode = -2; // Timeout detected
-        return WaitResult;
-      } else if (errno != EINTR) {
-        MakeErrMsg(ErrMsg, "Error waiting for child process");
-        WaitResult.ReturnCode = -1;
-        return WaitResult;
-      }
-    }
-  }
-
-  // We exited normally without timeout, so turn off the timer.
-  if (SecondsToWait && !WaitUntilTerminates) {
-    alarm(0);
-    sigaction(SIGALRM, &Old, nullptr);
-  }
-
-  // Return the proper exit status. Detect error conditions
-  // so we can return -1 for them and set ErrMsg informatively.
-  int result = 0;
-  if (WIFEXITED(status)) {
-    result = WEXITSTATUS(status);
-    WaitResult.ReturnCode = result;
-
-    if (result == 127) {
-      if (ErrMsg)
-        *ErrMsg = llvm::sys::StrError(ENOENT);
-      WaitResult.ReturnCode = -1;
-      return WaitResult;
-    }
-    if (result == 126) {
-      if (ErrMsg)
-        *ErrMsg = "Program could not be executed";
-      WaitResult.ReturnCode = -1;
-      return WaitResult;
-    }
-  } else if (WIFSIGNALED(status)) {
-    if (ErrMsg) {
-      *ErrMsg = strsignal(WTERMSIG(status));
-#ifdef WCOREDUMP
-      if (WCOREDUMP(status))
-        *ErrMsg += " (core dumped)";
-#endif
-    }
-    // Return a special value to indicate that the process received an unhandled
-    // signal during execution as opposed to failing to execute.
-    WaitResult.ReturnCode = -2;
-  }
-  return WaitResult;
-}
-
-std::error_code sys::ChangeStdinToBinary() {
-  // Do nothing, as Unix doesn't differentiate between text and binary.
-  return std::error_code();
-}
-
-std::error_code sys::ChangeStdoutToBinary() {
-  // Do nothing, as Unix doesn't differentiate between text and binary.
-  return std::error_code();
-}
-
-std::error_code
-llvm::sys::writeFileWithEncoding(StringRef FileName, StringRef Contents,
-                                 WindowsEncodingMethod Encoding /*unused*/) {
-  std::error_code EC;
-  llvm::raw_fd_ostream OS(FileName, EC, llvm::sys::fs::OpenFlags::F_Text);
-
-  if (EC)
-    return EC;
-
-  OS << Contents;
-
-  if (OS.has_error())
-    return make_error_code(errc::io_error);
-
-  return EC;
-}
-
-bool llvm::sys::commandLineFitsWithinSystemLimits(StringRef Program,
-                                                  ArrayRef<StringRef> Args) {
-  static long ArgMax = sysconf(_SC_ARG_MAX);
-  // POSIX requires that _POSIX_ARG_MAX is 4096, which is the lowest possible
-  // value for ARG_MAX on a POSIX compliant system.
-  static long ArgMin = _POSIX_ARG_MAX;
-
-  // This the same baseline used by xargs.
-  long EffectiveArgMax = 128 * 1024;
-
-  if (EffectiveArgMax > ArgMax)
-    EffectiveArgMax = ArgMax;
-  else if (EffectiveArgMax < ArgMin)
-    EffectiveArgMax = ArgMin;
-
-  // System says no practical limit.
-  if (ArgMax == -1)
-    return true;
-
-  // Conservatively account for space required by environment variables.
-  long HalfArgMax = EffectiveArgMax / 2;
-
-  size_t ArgLength = Program.size() + 1;
-  for (StringRef Arg : Args) {
-    // Ensure that we do not exceed the MAX_ARG_STRLEN constant on Linux, which
-    // does not have a constant unlike what the man pages would have you
-    // believe. Since this limit is pretty high, perform the check
-    // unconditionally rather than trying to be aggressive and limiting it to
-    // Linux only.
-    if (Arg.size() >= (32 * 4096))
-      return false;
-
-    ArgLength += Arg.size() + 1;
-    if (ArgLength > size_t(HalfArgMax)) {
-      return false;
-    }
-  }
-
-  return true;
-}
-}