//===----------------------------------------------------------------------===//
#include "Windows.h"
+#include "llvm/Support/FileSystem.h"
#include <cstdio>
#include <fcntl.h>
#include <io.h>
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;
- }
-}
-
// 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)
// See if it wasn't found.
if (len == 0)
- return Path();
+ return "";
// See if we got the entire path.
if (len < MAX_PATH)
- return Path(buffer);
+ return std::string(buffer);
// Buffer was too small; grow and retry.
while (true) {
// 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();
+ return "";
else if (len2 <= len)
- return Path(b);
+ return std::string(b);
len = len2;
}
}
-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),
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,
+ h = CreateFile(fname.c_str(), 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 " +
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(void **Data,
+ 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;
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++ = ' ';
}
fflush(stdout);
fflush(stderr);
- BOOL rc = CreateProcess(path.c_str(), command, NULL, NULL, TRUE, 0,
+ std::string ProgramStr = Program;
+ BOOL rc = CreateProcess(ProgramStr.c_str(), command, NULL, NULL, TRUE, 0,
envblock, NULL, &si, &pi);
DWORD err = GetLastError();
if (!rc) {
SetLastError(err);
MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
- path.str() + "'");
+ ProgramStr + "'");
return false;
}
- Win32ProcessInfo* wpi = new Win32ProcessInfo;
- wpi->hProcess = pi.hProcess;
- wpi->dwProcessId = pi.dwProcessId;
- Data_ = wpi;
+ if (Data) {
+ Win32ProcessInfo* wpi = new Win32ProcessInfo;
+ wpi->hProcess = pi.hProcess;
+ wpi->dwProcessId = pi.dwProcessId;
+ *Data = wpi;
+ }
// Make sure these get closed no matter what.
ScopedCommonHandle hThread(pi.hThread);
}
}
+ // Don't leak the handle if the caller doesn't want it.
+ if (!Data)
+ CloseHandle(pi.hProcess);
+
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;
-
+static int WaitAux(Win32ProcessInfo *wpi, unsigned secondsToWait,
+ std::string *ErrMsg) {
// Wait for the process to terminate.
+ HANDLE hProcess = wpi->hProcess;
DWORD millisecondsToWait = INFINITE;
if (secondsToWait > 0)
millisecondsToWait = secondsToWait * 1000;
return 1;
}
-error_code Program::ChangeStdinToBinary(){
+static int Wait(void *&Data, StringRef Program, unsigned secondsToWait,
+ std::string *ErrMsg) {
+ Win32ProcessInfo *wpi = reinterpret_cast<Win32ProcessInfo *>(Data);
+ int Ret = WaitAux(wpi, secondsToWait, ErrMsg);
+
+ CloseHandle(wpi->hProcess);
+ delete wpi;
+ Data = 0;
+
+ return Ret;
+}
+
+namespace llvm {
+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;
+}
+
}
projects / oota-llvm.git / blobdiff