1 files changed, 462 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/Windows/Program.inc b/contrib/llvm/lib/Support/Windows/Program.inc
new file mode 100644
index 0000000..dc09738
--- /dev/null
+++ b/contrib/llvm/lib/Support/Windows/Program.inc
@@ -0,0 +1,462 @@
+//===- Win32/Program.cpp - Win32 Program Implementation ------- -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the Win32 specific implementation of the Program class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Windows.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/FileSystem.h"
+#include <cstdio>
+#include <fcntl.h>
+#include <io.h>
+#include <malloc.h>
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code
+//===          and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+using namespace sys;
+
+ProcessInfo::ProcessInfo() : ProcessHandle(0), Pid(0), ReturnCode(0) {}
+
+// This function just uses the PATH environment variable to find the program.
+std::string sys::FindProgramByName(const std::string &progName) {
+  // Check some degenerate cases
+  if (progName.length() == 0) // no program
+    return "";
+  std::string temp = progName;
+  // Return paths with slashes verbatim.
+  if (progName.find('\\') != std::string::npos ||
+      progName.find('/') != std::string::npos)
+    return temp;
+
+  // At this point, the file name is valid and does not contain slashes.
+  // Let Windows search for it.
+  SmallVector<wchar_t, MAX_PATH> progNameUnicode;
+  if (windows::UTF8ToUTF16(progName, progNameUnicode))
+    return "";
+
+  SmallVector<wchar_t, MAX_PATH> buffer;
+  DWORD len = MAX_PATH;
+  do {
+    buffer.reserve(len);
+    len = ::SearchPathW(NULL, progNameUnicode.data(), L".exe",
+                        buffer.capacity(), buffer.data(), NULL);
+
+    // See if it wasn't found.
+    if (len == 0)
+      return "";
+
+    // Buffer was too small; grow and retry.
+  } while (len > buffer.capacity());
+
+  buffer.set_size(len);
+  SmallVector<char, MAX_PATH> result;
+  if (windows::UTF16ToUTF8(buffer.begin(), buffer.size(), result))
+    return "";
+
+  return std::string(result.data(), result.size());
+}
+
+static HANDLE RedirectIO(const StringRef *path, int fd, std::string* ErrMsg) {
+  HANDLE h;
+  if (path == 0) {
+    if (!DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
+                         GetCurrentProcess(), &h,
+                         0, TRUE, DUPLICATE_SAME_ACCESS))
+      return INVALID_HANDLE_VALUE;
+    return h;
+  }
+
+  std::string fname;
+  if (path->empty())
+    fname = "NUL";
+  else
+    fname = *path;
+
+  SECURITY_ATTRIBUTES sa;
+  sa.nLength = sizeof(sa);
+  sa.lpSecurityDescriptor = 0;
+  sa.bInheritHandle = TRUE;
+
+  SmallVector<wchar_t, 128> fnameUnicode;
+  if (windows::UTF8ToUTF16(fname, fnameUnicode))
+    return INVALID_HANDLE_VALUE;
+
+  h = CreateFileW(fnameUnicode.data(), fd ? GENERIC_WRITE : GENERIC_READ,
+                  FILE_SHARE_READ, &sa, fd == 0 ? OPEN_EXISTING : CREATE_ALWAYS,
+                  FILE_ATTRIBUTE_NORMAL, NULL);
+  if (h == INVALID_HANDLE_VALUE) {
+    MakeErrMsg(ErrMsg, std::string(fname) + ": Can't open file for " +
+        (fd ? "input: " : "output: "));
+  }
+
+  return h;
+}
+
+/// ArgNeedsQuotes - Check whether argument needs to be quoted when calling
+/// CreateProcess.
+static bool ArgNeedsQuotes(const char *Str) {
+  return Str[0] == '\0' || strpbrk(Str, "\t \"&\'()*<>\\`^|") != 0;
+}
+
+/// CountPrecedingBackslashes - Returns the number of backslashes preceding Cur
+/// in the C string Start.
+static unsigned int CountPrecedingBackslashes(const char *Start,
+                                              const char *Cur) {
+  unsigned int Count = 0;
+  --Cur;
+  while (Cur >= Start && *Cur == '\\') {
+    ++Count;
+    --Cur;
+  }
+  return Count;
+}
+
+/// EscapePrecedingEscapes - Append a backslash to Dst for every backslash
+/// preceding Cur in the Start string.  Assumes Dst has enough space.
+static char *EscapePrecedingEscapes(char *Dst, const char *Start,
+                                    const char *Cur) {
+  unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Cur);
+  while (PrecedingEscapes > 0) {
+    *Dst++ = '\\';
+    --PrecedingEscapes;
+  }
+  return Dst;
+}
+
+/// ArgLenWithQuotes - Check whether argument needs to be quoted when calling
+/// CreateProcess and returns length of quoted arg with escaped quotes
+static unsigned int ArgLenWithQuotes(const char *Str) {
+  const char *Start = Str;
+  bool Quoted = ArgNeedsQuotes(Str);
+  unsigned int len = Quoted ? 2 : 0;
+
+  while (*Str != '\0') {
+    if (*Str == '\"') {
+      // We need to add a backslash, but ensure that it isn't escaped.
+      unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Str);
+      len += PrecedingEscapes + 1;
+    }
+    // Note that we *don't* need to escape runs of backslashes that don't
+    // precede a double quote!  See MSDN:
+    // http://msdn.microsoft.com/en-us/library/17w5ykft%28v=vs.85%29.aspx
+
+    ++len;
+    ++Str;
+  }
+
+  if (Quoted) {
+    // Make sure the closing quote doesn't get escaped by a trailing backslash.
+    unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Str);
+    len += PrecedingEscapes + 1;
+  }
+
+  return len;
+}
+
+}
+
+static bool Execute(ProcessInfo &PI, StringRef Program, const char **args,
+                    const char **envp, const StringRef **redirects,
+                    unsigned memoryLimit, std::string *ErrMsg) {
+  if (!sys::fs::can_execute(Program)) {
+    if (ErrMsg)
+      *ErrMsg = "program not executable";
+    return false;
+  }
+
+  // Windows wants a command line, not an array of args, to pass to the new
+  // process.  We have to concatenate them all, while quoting the args that
+  // have embedded spaces (or are empty).
+
+  // First, determine the length of the command line.
+  unsigned len = 0;
+  for (unsigned i = 0; args[i]; i++) {
+    len += ArgLenWithQuotes(args[i]) + 1;
+  }
+
+  // Now build the command line.
+  OwningArrayPtr<char> command(new char[len+1]);
+  char *p = command.get();
+
+  for (unsigned i = 0; args[i]; i++) {
+    const char *arg = args[i];
+    const char *start = arg;
+
+    bool needsQuoting = ArgNeedsQuotes(arg);
+    if (needsQuoting)
+      *p++ = '"';
+
+    while (*arg != '\0') {
+      if (*arg == '\"') {
+        // Escape all preceding escapes (if any), and then escape the quote.
+        p = EscapePrecedingEscapes(p, start, arg);
+        *p++ = '\\';
+      }
+
+      *p++ = *arg++;
+    }
+
+    if (needsQuoting) {
+      // Make sure our quote doesn't get escaped by a trailing backslash.
+      p = EscapePrecedingEscapes(p, start, arg);
+      *p++ = '"';
+    }
+    *p++ = ' ';
+  }
+
+  *p = 0;
+
+  // The pointer to the environment block for the new process.
+  std::vector<wchar_t> EnvBlock;
+
+  if (envp) {
+    // An environment block consists of a null-terminated block of
+    // null-terminated strings. Convert the array of environment variables to
+    // an environment block by concatenating them.
+    for (unsigned i = 0; envp[i]; ++i) {
+      SmallVector<wchar_t, MAX_PATH> EnvString;
+      if (error_code ec = windows::UTF8ToUTF16(envp[i], EnvString)) {
+        SetLastError(ec.value());
+        MakeErrMsg(ErrMsg, "Unable to convert environment variable to UTF-16");
+        return false;
+      }
+
+      EnvBlock.insert(EnvBlock.end(), EnvString.begin(), EnvString.end());
+      EnvBlock.push_back(0);
+    }
+    EnvBlock.push_back(0);
+  }
+
+  // Create a child process.
+  STARTUPINFOW si;
+  memset(&si, 0, sizeof(si));
+  si.cb = sizeof(si);
+  si.hStdInput = INVALID_HANDLE_VALUE;
+  si.hStdOutput = INVALID_HANDLE_VALUE;
+  si.hStdError = INVALID_HANDLE_VALUE;
+
+  if (redirects) {
+    si.dwFlags = STARTF_USESTDHANDLES;
+
+    si.hStdInput = RedirectIO(redirects[0], 0, ErrMsg);
+    if (si.hStdInput == INVALID_HANDLE_VALUE) {
+      MakeErrMsg(ErrMsg, "can't redirect stdin");
+      return false;
+    }
+    si.hStdOutput = RedirectIO(redirects[1], 1, ErrMsg);
+    if (si.hStdOutput == INVALID_HANDLE_VALUE) {
+      CloseHandle(si.hStdInput);
+      MakeErrMsg(ErrMsg, "can't redirect stdout");
+      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 handle already open for stdout.
+      if (!DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
+                           GetCurrentProcess(), &si.hStdError,
+                           0, TRUE, DUPLICATE_SAME_ACCESS)) {
+        CloseHandle(si.hStdInput);
+        CloseHandle(si.hStdOutput);
+        MakeErrMsg(ErrMsg, "can't dup stderr to stdout");
+        return false;
+      }
+    } else {
+      // Just redirect stderr
+      si.hStdError = RedirectIO(redirects[2], 2, ErrMsg);
+      if (si.hStdError == INVALID_HANDLE_VALUE) {
+        CloseHandle(si.hStdInput);
+        CloseHandle(si.hStdOutput);
+        MakeErrMsg(ErrMsg, "can't redirect stderr");
+        return false;
+      }
+    }
+  }
+
+  PROCESS_INFORMATION pi;
+  memset(&pi, 0, sizeof(pi));
+
+  fflush(stdout);
+  fflush(stderr);
+
+  SmallVector<wchar_t, MAX_PATH> ProgramUtf16;
+  if (error_code ec = windows::UTF8ToUTF16(Program, ProgramUtf16)) {
+    SetLastError(ec.value());
+    MakeErrMsg(ErrMsg,
+               std::string("Unable to convert application name to UTF-16"));
+    return false;
+  }
+
+  SmallVector<wchar_t, MAX_PATH> CommandUtf16;
+  if (error_code ec = windows::UTF8ToUTF16(command.get(), CommandUtf16)) {
+    SetLastError(ec.value());
+    MakeErrMsg(ErrMsg,
+               std::string("Unable to convert command-line to UTF-16"));
+    return false;
+  }
+
+  BOOL rc = CreateProcessW(ProgramUtf16.data(), CommandUtf16.data(), 0, 0,
+                           TRUE, CREATE_UNICODE_ENVIRONMENT,
+                           EnvBlock.empty() ? 0 : EnvBlock.data(), 0, &si,
+                           &pi);
+  DWORD err = GetLastError();
+
+  // Regardless of whether the process got created or not, we are done with
+  // the handles we created for it to inherit.
+  CloseHandle(si.hStdInput);
+  CloseHandle(si.hStdOutput);
+  CloseHandle(si.hStdError);
+
+  // Now return an error if the process didn't get created.
+  if (!rc) {
+    SetLastError(err);
+    MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
+               Program.str() + "'");
+    return false;
+  }
+
+  PI.Pid = pi.dwProcessId;
+  PI.ProcessHandle = pi.hProcess;
+
+  // Make sure these get closed no matter what.
+  ScopedCommonHandle hThread(pi.hThread);
+
+  // Assign the process to a job if a memory limit is defined.
+  ScopedJobHandle hJob;
+  if (memoryLimit != 0) {
+    hJob = CreateJobObjectW(0, 0);
+    bool success = false;
+    if (hJob) {
+      JOBOBJECT_EXTENDED_LIMIT_INFORMATION jeli;
+      memset(&jeli, 0, sizeof(jeli));
+      jeli.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_PROCESS_MEMORY;
+      jeli.ProcessMemoryLimit = uintptr_t(memoryLimit) * 1048576;
+      if (SetInformationJobObject(hJob, JobObjectExtendedLimitInformation,
+                                  &jeli, sizeof(jeli))) {
+        if (AssignProcessToJobObject(hJob, pi.hProcess))
+          success = true;
+      }
+    }
+    if (!success) {
+      SetLastError(GetLastError());
+      MakeErrMsg(ErrMsg, std::string("Unable to set memory limit"));
+      TerminateProcess(pi.hProcess, 1);
+      WaitForSingleObject(pi.hProcess, INFINITE);
+      return false;
+    }
+  }
+
+  return true;
+}
+
+namespace llvm {
+ProcessInfo sys::Wait(const ProcessInfo &PI, unsigned SecondsToWait,
+                      bool WaitUntilChildTerminates, std::string *ErrMsg) {
+  assert(PI.Pid && "invalid pid to wait on, process not started?");
+  assert(PI.ProcessHandle &&
+         "invalid process handle to wait on, process not started?");
+  DWORD milliSecondsToWait = 0;
+  if (WaitUntilChildTerminates)
+    milliSecondsToWait = INFINITE;
+  else if (SecondsToWait > 0)
+    milliSecondsToWait = SecondsToWait * 1000;
+
+  ProcessInfo WaitResult = PI;
+  DWORD WaitStatus = WaitForSingleObject(PI.ProcessHandle, milliSecondsToWait);
+  if (WaitStatus == WAIT_TIMEOUT) {
+    if (SecondsToWait) {
+      if (!TerminateProcess(PI.ProcessHandle, 1)) {
+        if (ErrMsg)
+          MakeErrMsg(ErrMsg, "Failed to terminate timed-out program.");
+
+        // -2 indicates a crash or timeout as opposed to failure to execute.
+        WaitResult.ReturnCode = -2;
+        CloseHandle(PI.ProcessHandle);
+        return WaitResult;
+      }
+      WaitForSingleObject(PI.ProcessHandle, INFINITE);
+      CloseHandle(PI.ProcessHandle);
+    } else {
+      // Non-blocking wait.
+      return ProcessInfo();
+    }
+  }
+
+  // Get its exit status.
+  DWORD status;
+  BOOL rc = GetExitCodeProcess(PI.ProcessHandle, &status);
+  DWORD err = GetLastError();
+  CloseHandle(PI.ProcessHandle);
+
+  if (!rc) {
+    SetLastError(err);
+    if (ErrMsg)
+      MakeErrMsg(ErrMsg, "Failed getting status for program.");
+
+    // -2 indicates a crash or timeout as opposed to failure to execute.
+    WaitResult.ReturnCode = -2;
+    return WaitResult;
+  }
+
+  if (!status)
+    return WaitResult;
+
+  // Pass 10(Warning) and 11(Error) to the callee as negative value.
+  if ((status & 0xBFFF0000U) == 0x80000000U)
+    WaitResult.ReturnCode = static_cast<int>(status);
+  else if (status & 0xFF)
+    WaitResult.ReturnCode = status & 0x7FFFFFFF;
+  else
+    WaitResult.ReturnCode = 1;
+
+  return WaitResult;
+}
+
+error_code sys::ChangeStdinToBinary(){
+  int result = _setmode( _fileno(stdin), _O_BINARY );
+  if (result == -1)
+    return error_code(errno, generic_category());
+  return make_error_code(errc::success);
+}
+
+error_code sys::ChangeStdoutToBinary(){
+  int result = _setmode( _fileno(stdout), _O_BINARY );
+  if (result == -1)
+    return error_code(errno, generic_category());
+  return make_error_code(errc::success);
+}
+
+error_code sys::ChangeStderrToBinary(){
+  int result = _setmode( _fileno(stderr), _O_BINARY );
+  if (result == -1)
+    return error_code(errno, generic_category());
+  return make_error_code(errc::success);
+}
+
+bool llvm::sys::argumentsFitWithinSystemLimits(ArrayRef<const char*> Args) {
+  // The documented max length of the command line passed to CreateProcess.
+  static const size_t MaxCommandStringLength = 32768;
+  size_t ArgLength = 0;
+  for (ArrayRef<const char*>::iterator I = Args.begin(), E = Args.end();
+       I != E; ++I) {
+    // Account for the trailing space for every arg but the last one and the
+    // trailing NULL of the last argument.
+    ArgLength += ArgLenWithQuotes(*I) + 1;
+    if (ArgLength > MaxCommandStringLength) {
+      return false;
+    }
+  }
+  return true;
+}
+}