//===----------------------------------------------------------------------===//
#include "Windows.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/FileSystem.h"
#include <cstdio>
#include <fcntl.h>
#include <io.h>
//=== and must not be UNIX code
//===----------------------------------------------------------------------===//
-namespace {
- struct Win32ProcessInfo {
- HANDLE hProcess;
- DWORD dwProcessId;
- };
-}
-
namespace llvm {
using namespace sys;
-Program::Program() : Data_(0) {}
-
-Program::~Program() {
- if (Data_) {
- Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
- CloseHandle(wpi->hProcess);
- delete wpi;
- Data_ = 0;
- }
-}
+ProcessInfo::ProcessInfo() : Pid(0), ProcessHandle(0), ReturnCode(0) {}
// This function just uses the PATH environment variable to find the program.
-Path
-Program::FindProgramByName(const std::string& progName) {
-
+std::string sys::FindProgramByName(const std::string &progName) {
// Check some degenerate cases
if (progName.length() == 0) // no program
- return Path();
- Path temp;
- if (!temp.set(progName)) // invalid name
- return Path();
+ return "";
+ std::string temp = progName;
// Return paths with slashes verbatim.
if (progName.find('\\') != std::string::npos ||
progName.find('/') != std::string::npos)
// At this point, the file name is valid and does not contain slashes.
// Let Windows search for it.
- char buffer[MAX_PATH];
- char *dummy = NULL;
- DWORD len = SearchPath(NULL, progName.c_str(), ".exe", MAX_PATH,
- buffer, &dummy);
-
- // See if it wasn't found.
- if (len == 0)
- return Path();
-
- // See if we got the entire path.
- if (len < MAX_PATH)
- return Path(buffer);
-
- // Buffer was too small; grow and retry.
- while (true) {
- char *b = reinterpret_cast<char *>(_alloca(len+1));
- DWORD len2 = SearchPath(NULL, progName.c_str(), ".exe", len+1, b, &dummy);
-
- // It is unlikely the search failed, but it's always possible some file
- // was added or removed since the last search, so be paranoid...
- if (len2 == 0)
- return Path();
- else if (len2 <= len)
- return Path(b);
-
- len = len2;
- }
+ 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 Path *path, int fd, std::string* ErrMsg) {
+static HANDLE RedirectIO(const StringRef *path, int fd, std::string* ErrMsg) {
HANDLE h;
if (path == 0) {
- DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
- GetCurrentProcess(), &h,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
+ if (!DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
+ GetCurrentProcess(), &h,
+ 0, TRUE, DUPLICATE_SAME_ACCESS))
+ return INVALID_HANDLE_VALUE;
return h;
}
- const char *fname;
- if (path->isEmpty())
+ std::string fname;
+ if (path->empty())
fname = "NUL";
else
- fname = path->c_str();
+ fname = *path;
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = 0;
sa.bInheritHandle = TRUE;
- h = CreateFile(fname, fd ? GENERIC_WRITE : GENERIC_READ, FILE_SHARE_READ,
- &sa, fd == 0 ? OPEN_EXISTING : CREATE_ALWAYS,
- FILE_ATTRIBUTE_NORMAL, NULL);
+ 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 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) {
- unsigned int len = ArgNeedsQuotes(Str) ? 2 : 0;
+ const char *Start = Str;
+ bool Quoted = ArgNeedsQuotes(Str);
+ unsigned int len = Quoted ? 2 : 0;
while (*Str != '\0') {
- if (*Str == '\"')
- ++len;
+ 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;
}
+}
-bool
-Program::Execute(const Path& path,
- const char** args,
- const char** envp,
- const Path** redirects,
- unsigned memoryLimit,
- std::string* ErrMsg) {
- if (Data_) {
- Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
- CloseHandle(wpi->hProcess);
- delete wpi;
- Data_ = 0;
- }
-
- if (!path.canExecute()) {
+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;
}
// Now build the command line.
- char *command = reinterpret_cast<char *>(_alloca(len+1));
- char *p = command;
+ 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 == '\"')
+ if (*arg == '\"') {
+ // Escape all preceding escapes (if any), and then escape the quote.
+ p = EscapePrecedingEscapes(p, start, arg);
*p++ = '\\';
+ }
*p++ = *arg++;
}
- if (needsQuoting)
+ 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.
- char *envblock = 0;
+ 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;
+ }
- // First, determine the length of the environment block.
- len = 0;
- for (unsigned i = 0; envp[i]; i++)
- len += strlen(envp[i]) + 1;
-
- // Now build the environment block.
- envblock = reinterpret_cast<char *>(_alloca(len+1));
- p = envblock;
-
- for (unsigned i = 0; envp[i]; i++) {
- const char *ev = envp[i];
- size_t len = strlen(ev) + 1;
- memcpy(p, ev, len);
- p += len;
+ EnvBlock.insert(EnvBlock.end(), EnvString.begin(), EnvString.end());
+ EnvBlock.push_back(0);
}
-
- *p = 0;
+ EnvBlock.push_back(0);
}
// Create a child process.
- STARTUPINFO si;
+ STARTUPINFOW si;
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
si.hStdInput = INVALID_HANDLE_VALUE;
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.
- DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
- GetCurrentProcess(), &si.hStdError,
- 0, TRUE, DUPLICATE_SAME_ACCESS);
+ 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);
fflush(stdout);
fflush(stderr);
- BOOL rc = CreateProcess(path.c_str(), command, NULL, NULL, TRUE, 0,
- envblock, NULL, &si, &pi);
+
+ 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
if (!rc) {
SetLastError(err);
MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
- path.str() + "'");
+ Program.str() + "'");
return false;
}
- Win32ProcessInfo* wpi = new Win32ProcessInfo;
- wpi->hProcess = pi.hProcess;
- wpi->dwProcessId = pi.dwProcessId;
- Data_ = wpi;
+
+ PI.Pid = pi.dwProcessId;
+ PI.ProcessHandle = pi.hProcess;
// Make sure these get closed no matter what.
ScopedCommonHandle hThread(pi.hThread);
return true;
}
-int
-Program::Wait(const Path &path,
- unsigned secondsToWait,
- std::string* ErrMsg) {
- if (Data_ == 0) {
- MakeErrMsg(ErrMsg, "Process not started!");
- return -1;
- }
-
- Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
- HANDLE hProcess = wpi->hProcess;
-
- // Wait for the process to terminate.
- DWORD millisecondsToWait = INFINITE;
- if (secondsToWait > 0)
- millisecondsToWait = secondsToWait * 1000;
-
- if (WaitForSingleObject(hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
- if (!TerminateProcess(hProcess, 1)) {
- MakeErrMsg(ErrMsg, "Failed to terminate timed-out program.");
- // -2 indicates a crash or timeout as opposed to failure to execute.
- return -2;
+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();
}
- WaitForSingleObject(hProcess, INFINITE);
}
// Get its exit status.
DWORD status;
- BOOL rc = GetExitCodeProcess(hProcess, &status);
+ BOOL rc = GetExitCodeProcess(PI.ProcessHandle, &status);
DWORD err = GetLastError();
+ CloseHandle(PI.ProcessHandle);
if (!rc) {
SetLastError(err);
- MakeErrMsg(ErrMsg, "Failed getting status for program.");
+ if (ErrMsg)
+ MakeErrMsg(ErrMsg, "Failed getting status for program.");
+
// -2 indicates a crash or timeout as opposed to failure to execute.
- return -2;
+ WaitResult.ReturnCode = -2;
+ return WaitResult;
}
if (!status)
- return 0;
+ return WaitResult;
// Pass 10(Warning) and 11(Error) to the callee as negative value.
if ((status & 0xBFFF0000U) == 0x80000000U)
- return (int)status;
-
- if (status & 0xFF)
- return status & 0x7FFFFFFF;
+ WaitResult.ReturnCode = static_cast<int>(status);
+ else if (status & 0xFF)
+ WaitResult.ReturnCode = status & 0x7FFFFFFF;
+ else
+ WaitResult.ReturnCode = 1;
- return 1;
+ return WaitResult;
}
-error_code Program::ChangeStdinToBinary(){
+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 Program::ChangeStdoutToBinary(){
+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 Program::ChangeStderrToBinary(){
+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;
+}
}
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