1 //===- Win32/Program.cpp - Win32 Program Implementation ------- -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Jeff Cohen and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides the Win32 specific implementation of the Program class.
12 //===----------------------------------------------------------------------===//
20 //===----------------------------------------------------------------------===//
21 //=== WARNING: Implementation here must contain only Win32 specific code
22 //=== and must not be UNIX code
23 //===----------------------------------------------------------------------===//
28 // This function just uses the PATH environment variable to find the program.
30 Program::FindProgramByName(const std::string& progName) {
32 // Check some degenerate cases
33 if (progName.length() == 0) // no program
36 if (!temp.set(progName)) // invalid name
38 if (temp.canExecute()) // already executable as is
41 // At this point, the file name is valid and its not executable.
42 // Let Windows search for it.
43 char buffer[MAX_PATH];
45 DWORD len = SearchPath(NULL, progName.c_str(), ".exe", MAX_PATH,
48 // See if it wasn't found.
52 // See if we got the entire path.
56 // Buffer was too small; grow and retry.
58 char *b = reinterpret_cast<char *>(_alloca(len+1));
59 DWORD len2 = SearchPath(NULL, progName.c_str(), ".exe", len+1, b, &dummy);
61 // It is unlikely the search failed, but it's always possible some file
62 // was added or removed since the last search, so be paranoid...
72 static HANDLE RedirectIO(const Path *path, int fd, std::string* ErrMsg) {
75 DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
76 GetCurrentProcess(), &h,
77 0, TRUE, DUPLICATE_SAME_ACCESS);
81 const char *fname = path->toString().c_str();
85 SECURITY_ATTRIBUTES sa;
86 sa.nLength = sizeof(sa);
87 sa.lpSecurityDescriptor = 0;
88 sa.bInheritHandle = TRUE;
90 h = CreateFile(fname, fd ? GENERIC_WRITE : GENERIC_READ, FILE_SHARE_READ,
91 &sa, fd == 0 ? OPEN_EXISTING : CREATE_ALWAYS,
92 FILE_ATTRIBUTE_NORMAL, NULL);
93 if (h == INVALID_HANDLE_VALUE) {
94 MakeErrMsg(ErrMsg, std::string(fname) + ": Can't open file for " +
95 (fd ? "input: " : "output: "));
102 Program::ExecuteAndWait(const Path& path,
105 const Path** redirects,
106 unsigned secondsToWait,
107 std::string* ErrMsg) {
108 if (!path.canExecute()) {
110 *ErrMsg = "program not executable";
114 // Windows wants a command line, not an array of args, to pass to the new
115 // process. We have to concatenate them all, while quoting the args that
116 // have embedded spaces.
118 // First, determine the length of the command line.
120 for (unsigned i = 0; args[i]; i++) {
121 len += strlen(args[i]) + 1;
122 if (strchr(args[i], ' '))
126 // Now build the command line.
127 char *command = reinterpret_cast<char *>(_alloca(len));
130 for (unsigned i = 0; args[i]; i++) {
131 const char *arg = args[i];
132 size_t len = strlen(arg);
133 bool needsQuoting = strchr(arg, ' ') != 0;
145 // Create a child process.
147 memset(&si, 0, sizeof(si));
149 si.hStdInput = INVALID_HANDLE_VALUE;
150 si.hStdOutput = INVALID_HANDLE_VALUE;
151 si.hStdError = INVALID_HANDLE_VALUE;
154 si.dwFlags = STARTF_USESTDHANDLES;
156 si.hStdInput = RedirectIO(redirects[0], 0, ErrMsg);
157 if (si.hStdInput == INVALID_HANDLE_VALUE) {
158 MakeErrMsg(ErrMsg, "can't redirect stdin");
161 si.hStdOutput = RedirectIO(redirects[1], 1);
162 if (si.hStdOutput == INVALID_HANDLE_VALUE) {
163 CloseHandle(si.hStdInput);
164 MakeErrMsg(ErrMsg, "can't redirect stdout");
167 if (redirects[1] && redirects[2] && *(redirects[1]) != *(redirects[2])) {
168 si.hStdError = RedirectIO(redirects[2], 2);
169 if (si.hStdError == INVALID_HANDLE_VALUE) {
170 CloseHandle(si.hStdInput);
171 CloseHandle(si.hStdOutput);
172 MakeErrMsg(ErrMsg, "can't redirect stderr");
176 DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
177 GetCurrentProcess(), &si.hStdError,
178 0, TRUE, DUPLICATE_SAME_ACCESS);
182 PROCESS_INFORMATION pi;
183 memset(&pi, 0, sizeof(pi));
187 BOOL rc = CreateProcess(path.c_str(), command, NULL, NULL, FALSE, 0,
188 envp, NULL, &si, &pi);
189 DWORD err = GetLastError();
191 // Regardless of whether the process got created or not, we are done with
192 // the handles we created for it to inherit.
193 CloseHandle(si.hStdInput);
194 CloseHandle(si.hStdOutput);
195 CloseHandle(si.hStdError);
197 // Now return an error if the process didn't get created.
201 MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
202 path.toString() + "'");
206 // Wait for it to terminate.
207 DWORD millisecondsToWait = INFINITE;
208 if (secondsToWait > 0)
209 millisecondsToWait = secondsToWait * 1000;
211 if (WaitForSingleObject(pi.hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
212 if (!TerminateProcess(pi.hProcess, 1)) {
213 MakeErrMsg(ErrMsg, std::string("Failed to terminate timed-out program '")
214 + path.toString() + "'");
217 WaitForSingleObject(pi.hProcess, INFINITE);
220 // Get its exit status.
222 rc = GetExitCodeProcess(pi.hProcess, &status);
223 err = GetLastError();
225 // Done with the handles; go close them.
226 CloseHandle(pi.hProcess);
227 CloseHandle(pi.hThread);
231 MakeErrMsg(ErrMsg, std::string("Failed getting status for program '") +
232 path.toString() + "'");
239 bool Program::ChangeStdinToBinary(){
240 int result = _setmode( _fileno(stdin), _O_BINARY );
244 bool Program::ChangeStdoutToBinary(){
245 int result = _setmode( _fileno(stdout), _O_BINARY );