37 ArrayRef<StringRef> Paths) {
38 assert(!Name.empty() &&
"Must have a name!");
41 return std::string(Name);
43 const wchar_t *Path =
nullptr;
44 std::wstring PathStorage;
46 PathStorage.reserve(Paths.size() * MAX_PATH);
47 for (
unsigned i = 0; i < Paths.size(); ++i) {
49 PathStorage.push_back(L
';');
50 StringRef
P = Paths[i];
51 SmallVector<wchar_t, MAX_PATH> TmpPath;
54 PathStorage.append(TmpPath.begin(), TmpPath.end());
56 Path = PathStorage.c_str();
59 SmallVector<wchar_t, MAX_PATH> U16Name;
63 SmallVector<StringRef, 12> PathExts;
64 PathExts.push_back(
"");
65 PathExts.push_back(
".exe");
66 if (
const char *PathExtEnv = std::getenv(
"PATHEXT"))
69 SmallVector<wchar_t, MAX_PATH> U16Result;
71 for (StringRef
Ext : PathExts) {
72 SmallVector<wchar_t, MAX_PATH> U16Ext;
77 U16Result.reserve(Len);
78 Len = ::SearchPathW(Path,
c_str(U16Name),
79 U16Ext.empty() ?
nullptr :
c_str(U16Ext),
80 U16Result.capacity(), U16Result.data(),
nullptr);
81 }
while (Len > U16Result.capacity());
90 U16Result.set_size(Len);
92 SmallVector<char, MAX_PATH> U8Result;
93 if (std::error_code EC =
97 return std::string(U8Result.begin(), U8Result.end());
100 static HANDLE RedirectIO(
const StringRef *path,
int fd, std::string* ErrMsg) {
103 if (!DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
104 GetCurrentProcess(), &h,
105 0, TRUE, DUPLICATE_SAME_ACCESS))
106 return INVALID_HANDLE_VALUE;
116 SECURITY_ATTRIBUTES sa;
117 sa.nLength =
sizeof(sa);
118 sa.lpSecurityDescriptor = 0;
119 sa.bInheritHandle = TRUE;
121 SmallVector<wchar_t, 128> fnameUnicode;
125 return INVALID_HANDLE_VALUE;
128 return INVALID_HANDLE_VALUE;
130 h = CreateFileW(fnameUnicode.data(), fd ? GENERIC_WRITE : GENERIC_READ,
131 FILE_SHARE_READ, &sa, fd == 0 ? OPEN_EXISTING : CREATE_ALWAYS,
132 FILE_ATTRIBUTE_NORMAL, NULL);
133 if (h == INVALID_HANDLE_VALUE) {
134 MakeErrMsg(ErrMsg, fname +
": Can't open file for " +
135 (fd ?
"input: " :
"output: "));
143 static bool ArgNeedsQuotes(
const char *Str) {
144 return Str[0] ==
'\0' || strpbrk(Str,
"\t \"&\'()*<>\\`^|") != 0;
149 static unsigned int CountPrecedingBackslashes(
const char *Start,
151 unsigned int Count = 0;
153 while (Cur >= Start && *Cur ==
'\\') {
162 static char *EscapePrecedingEscapes(
char *Dst,
const char *Start,
164 unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Cur);
165 while (PrecedingEscapes > 0) {
174 static unsigned int ArgLenWithQuotes(
const char *Str) {
175 const char *Start = Str;
176 bool Quoted = ArgNeedsQuotes(Str);
177 unsigned int len = Quoted ? 2 : 0;
179 while (*Str !=
'\0') {
182 unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Str);
183 len += PrecedingEscapes + 1;
195 unsigned PrecedingEscapes = CountPrecedingBackslashes(Start, Str);
196 len += PrecedingEscapes + 1;
204 static std::unique_ptr<char[]> flattenArgs(
const char **args) {
207 for (
unsigned i = 0; args[i]; i++) {
208 len += ArgLenWithQuotes(args[i]) + 1;
212 std::unique_ptr<char[]> command(
new char[len+1]);
213 char *p = command.get();
215 for (
unsigned i = 0; args[i]; i++) {
216 const char *arg = args[i];
217 const char *start = arg;
219 bool needsQuoting = ArgNeedsQuotes(arg);
223 while (*arg !=
'\0') {
226 p = EscapePrecedingEscapes(p, start, arg);
235 p = EscapePrecedingEscapes(p, start, arg);
245 static bool Execute(ProcessInfo &PI, StringRef Program,
const char **args,
246 const char **envp,
const StringRef **redirects,
247 unsigned memoryLimit, std::string *ErrMsg) {
250 *ErrMsg =
"program not executable";
257 std::unique_ptr<char[]> command = flattenArgs(args);
260 std::vector<wchar_t> EnvBlock;
266 for (
unsigned i = 0; envp[i]; ++i) {
267 SmallVector<wchar_t, MAX_PATH> EnvString;
269 SetLastError(ec.value());
270 MakeErrMsg(ErrMsg,
"Unable to convert environment variable to UTF-16");
274 EnvBlock.insert(EnvBlock.end(), EnvString.begin(), EnvString.end());
275 EnvBlock.push_back(0);
277 EnvBlock.push_back(0);
282 memset(&si, 0,
sizeof(si));
284 si.hStdInput = INVALID_HANDLE_VALUE;
285 si.hStdOutput = INVALID_HANDLE_VALUE;
286 si.hStdError = INVALID_HANDLE_VALUE;
289 si.dwFlags = STARTF_USESTDHANDLES;
291 si.hStdInput = RedirectIO(redirects[0], 0, ErrMsg);
292 if (si.hStdInput == INVALID_HANDLE_VALUE) {
296 si.hStdOutput = RedirectIO(redirects[1], 1, ErrMsg);
297 if (si.hStdOutput == INVALID_HANDLE_VALUE) {
298 CloseHandle(si.hStdInput);
302 if (redirects[1] && redirects[2] && *(redirects[1]) == *(redirects[2])) {
305 if (!DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
306 GetCurrentProcess(), &si.hStdError,
307 0, TRUE, DUPLICATE_SAME_ACCESS)) {
308 CloseHandle(si.hStdInput);
309 CloseHandle(si.hStdOutput);
310 MakeErrMsg(ErrMsg,
"can't dup stderr to stdout");
315 si.hStdError = RedirectIO(redirects[2], 2, ErrMsg);
316 if (si.hStdError == INVALID_HANDLE_VALUE) {
317 CloseHandle(si.hStdInput);
318 CloseHandle(si.hStdOutput);
325 PROCESS_INFORMATION pi;
326 memset(&pi, 0,
sizeof(pi));
331 SmallVector<wchar_t, MAX_PATH> ProgramUtf16;
333 SetLastError(ec.value());
335 std::string(
"Unable to convert application name to UTF-16"));
339 SmallVector<wchar_t, MAX_PATH> CommandUtf16;
341 SetLastError(ec.value());
343 std::string(
"Unable to convert command-line to UTF-16"));
347 BOOL
rc = CreateProcessW(ProgramUtf16.data(), CommandUtf16.data(), 0, 0,
348 TRUE, CREATE_UNICODE_ENVIRONMENT,
349 EnvBlock.empty() ? 0 : EnvBlock.data(), 0, &si,
351 DWORD err = GetLastError();
355 CloseHandle(si.hStdInput);
356 CloseHandle(si.hStdOutput);
357 CloseHandle(si.hStdError);
362 MakeErrMsg(ErrMsg, std::string(
"Couldn't execute program '") +
363 Program.str() +
"'");
367 PI.Pid = pi.dwProcessId;
368 PI.ProcessHandle = pi.hProcess;
375 if (memoryLimit != 0) {
376 hJob = CreateJobObjectW(0, 0);
379 JOBOBJECT_EXTENDED_LIMIT_INFORMATION jeli;
380 memset(&jeli, 0,
sizeof(jeli));
381 jeli.BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_PROCESS_MEMORY;
382 jeli.ProcessMemoryLimit = uintptr_t(memoryLimit) * 1048576;
383 if (SetInformationJobObject(hJob, JobObjectExtendedLimitInformation,
384 &jeli,
sizeof(jeli))) {
385 if (AssignProcessToJobObject(hJob, pi.hProcess))
390 SetLastError(GetLastError());
391 MakeErrMsg(ErrMsg, std::string(
"Unable to set memory limit"));
392 TerminateProcess(pi.hProcess, 1);
393 WaitForSingleObject(pi.hProcess, INFINITE);
402 ProcessInfo
sys::Wait(
const ProcessInfo &PI,
unsigned SecondsToWait,
403 bool WaitUntilChildTerminates, std::string *ErrMsg) {
404 assert(PI.Pid &&
"invalid pid to wait on, process not started?");
405 assert(PI.ProcessHandle &&
406 "invalid process handle to wait on, process not started?");
407 DWORD milliSecondsToWait = 0;
408 if (WaitUntilChildTerminates)
409 milliSecondsToWait = INFINITE;
410 else if (SecondsToWait > 0)
411 milliSecondsToWait = SecondsToWait * 1000;
413 ProcessInfo WaitResult = PI;
414 DWORD WaitStatus = WaitForSingleObject(PI.ProcessHandle, milliSecondsToWait);
415 if (WaitStatus == WAIT_TIMEOUT) {
417 if (!TerminateProcess(PI.ProcessHandle, 1)) {
419 MakeErrMsg(ErrMsg,
"Failed to terminate timed-out program.");
422 WaitResult.ReturnCode = -2;
423 CloseHandle(PI.ProcessHandle);
426 WaitForSingleObject(PI.ProcessHandle, INFINITE);
427 CloseHandle(PI.ProcessHandle);
430 return ProcessInfo();
436 BOOL rc = GetExitCodeProcess(PI.ProcessHandle, &status);
437 DWORD err = GetLastError();
438 if (err != ERROR_INVALID_HANDLE)
439 CloseHandle(PI.ProcessHandle);
444 MakeErrMsg(ErrMsg,
"Failed getting status for program.");
447 WaitResult.ReturnCode = -2;
455 if ((status & 0xBFFF0000U) == 0x80000000U)
456 WaitResult.ReturnCode =
static_cast<int>(
status);
457 else if (status & 0xFF)
458 WaitResult.ReturnCode = status & 0x7FFFFFFF;
460 WaitResult.ReturnCode = 1;
466 int result = _setmode(_fileno(stdin), _O_BINARY);
468 return std::error_code(errno, std::generic_category());
469 return std::error_code();
473 int result = _setmode(_fileno(stdout), _O_BINARY);
475 return std::error_code(errno, std::generic_category());
476 return std::error_code();
490 SmallVector<wchar_t, 1> ArgsUTF16;
491 SmallVector<char, 1> ArgsCurCP;
497 ArgsUTF16.data(), ArgsUTF16.size(), ArgsCurCP)))
500 OS.write(ArgsCurCP.data(), ArgsCurCP.size());
502 SmallVector<wchar_t, 1> ArgsUTF16;
510 memcpy(BOM, &src, 2);
512 OS.write((
char *)ArgsUTF16.data(), ArgsUTF16.size() << 1);
525 static const size_t MaxCommandStringLength = 32768;
526 size_t ArgLength = 0;
527 for (ArrayRef<const char*>::iterator
I = Args.begin(), E = Args.end();
531 ArgLength += ArgLenWithQuotes(*
I) + 1;
532 if (ArgLength > MaxCommandStringLength) {
bool can_execute(const Twine &Path)
Can we execute this file?
std::error_code ChangeStdoutToBinary()
UTF-8 is the LLVM native encoding, being the same as "do not perform encoding conversion"...
bool argumentsFitWithinSystemLimits(ArrayRef< const char * > Args)
Return true if the given arguments fit within system-specific argument length limits.
ErrorOr< std::string > findProgramByName(StringRef Name, ArrayRef< StringRef > Paths=ArrayRef< StringRef >())
Find the first executable file Name in Paths.
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
std::error_code make_error_code(BitcodeError E)
#define UNI_UTF16_BYTE_ORDER_MARK_NATIVE
std::error_code mapWindowsError(unsigned EV)
std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl< wchar_t > &utf16)
std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len, SmallVectorImpl< char > &utf8)
void SplitString(StringRef Source, SmallVectorImpl< StringRef > &OutFragments, StringRef Delimiters=" \t\n\v\f\r")
SplitString - Split up the specified string according to the specified delimiters, appending the result fragments to the output list.
static bool Execute(ProcessInfo &PI, StringRef Program, const char **args, const char **env, const StringRef **Redirects, unsigned memoryLimit, std::string *ErrMsg)
SmallVectorImpl< T >::const_pointer c_str(SmallVectorImpl< T > &str)
std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len, SmallVectorImpl< char > &utf8)
Convert from UTF16 to the current code page used in the system.
std::error_code writeFileWithEncoding(StringRef FileName, StringRef Contents, WindowsEncodingMethod Encoding=WEM_UTF8)
Saves the UTF8-encoded contents string into the file FileName using a specific encoding.
bool MakeErrMsg(std::string *ErrMsg, const std::string &prefix)
WindowsEncodingMethod
File encoding options when writing contents that a non-UTF8 tool will read (on Windows systems)...
The file should be opened in text mode on platforms that make this distinction.
std::error_code ChangeStdinToBinary()
A raw_ostream that writes to a file descriptor.
ProcessInfo Wait(const ProcessInfo &PI, unsigned SecondsToWait, bool WaitUntilTerminates, std::string *ErrMsg=nullptr)
This function waits for the process specified by PI to finish.
std::error_code status(const Twine &path, file_status &result)
Get file status as if by POSIX stat().
std::error_code widenPath(const Twine &Path8, SmallVectorImpl< wchar_t > &Path16)