It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Win32/Program.inc b/lib/System/Win32/Program.inc
new file mode 100644
index 0000000..60e9e41
--- /dev/null
+++ b/lib/System/Win32/Program.inc
@@ -0,0 +1,284 @@
+//===- Win32/Program.cpp - Win32 Program Implementation ------- -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Jeff Cohen and 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 "Win32.h"
+#include <cstdio>
+#include <malloc.h>
+#include <io.h>
+#include <fcntl.h>
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code
+//=== and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+using namespace sys;
+
+// This function just uses the PATH environment variable to find the program.
+Path
+Program::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();
+ if (temp.canExecute()) // already executable as is
+ return temp;
+
+ // At this point, the file name is valid and its not executable.
+ // 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;
+ }
+}
+
+static HANDLE RedirectIO(const Path *path, int fd, std::string* ErrMsg) {
+ HANDLE h;
+ if (path == 0) {
+ DuplicateHandle(GetCurrentProcess(), (HANDLE)_get_osfhandle(fd),
+ GetCurrentProcess(), &h,
+ 0, TRUE, DUPLICATE_SAME_ACCESS);
+ return h;
+ }
+
+ const char *fname = path->toString().c_str();
+ if (*fname == 0)
+ fname = "NUL";
+
+ 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);
+ if (h == INVALID_HANDLE_VALUE) {
+ MakeErrMsg(ErrMsg, std::string(fname) + ": Can't open file for " +
+ (fd ? "input: " : "output: "));
+ }
+
+ return h;
+}
+
+#ifdef __MINGW32__
+ // Due to unknown reason, mingw32's w32api doesn't have this declaration.
+ extern "C"
+ BOOL WINAPI SetInformationJobObject(HANDLE hJob,
+ JOBOBJECTINFOCLASS JobObjectInfoClass,
+ LPVOID lpJobObjectInfo,
+ DWORD cbJobObjectInfoLength);
+#endif
+
+int
+Program::ExecuteAndWait(const Path& path,
+ const char** args,
+ const char** envp,
+ const Path** redirects,
+ unsigned secondsToWait,
+ unsigned memoryLimit,
+ std::string* ErrMsg) {
+ if (!path.canExecute()) {
+ if (ErrMsg)
+ *ErrMsg = "program not executable";
+ return -1;
+ }
+
+ // 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.
+
+ // First, determine the length of the command line.
+ unsigned len = 0;
+ for (unsigned i = 0; args[i]; i++) {
+ len += strlen(args[i]) + 1;
+ if (strchr(args[i], ' '))
+ len += 2;
+ }
+
+ // Now build the command line.
+ char *command = reinterpret_cast<char *>(_alloca(len));
+ char *p = command;
+
+ for (unsigned i = 0; args[i]; i++) {
+ const char *arg = args[i];
+ size_t len = strlen(arg);
+ bool needsQuoting = strchr(arg, ' ') != 0;
+ if (needsQuoting)
+ *p++ = '"';
+ memcpy(p, arg, len);
+ p += len;
+ if (needsQuoting)
+ *p++ = '"';
+ *p++ = ' ';
+ }
+
+ *p = 0;
+
+ // Create a child process.
+ STARTUPINFO 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 -1;
+ }
+ si.hStdOutput = RedirectIO(redirects[1], 1, ErrMsg);
+ if (si.hStdOutput == INVALID_HANDLE_VALUE) {
+ CloseHandle(si.hStdInput);
+ MakeErrMsg(ErrMsg, "can't redirect stdout");
+ return -1;
+ }
+ if (redirects[1] && redirects[2] && *(redirects[1]) != *(redirects[2])) {
+ 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 -1;
+ }
+ } else {
+ DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
+ GetCurrentProcess(), &si.hStdError,
+ 0, TRUE, DUPLICATE_SAME_ACCESS);
+ }
+ }
+
+ PROCESS_INFORMATION pi;
+ memset(&pi, 0, sizeof(pi));
+
+ fflush(stdout);
+ fflush(stderr);
+ BOOL rc = CreateProcess(path.c_str(), command, NULL, NULL, FALSE, 0,
+ envp, NULL, &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 '") +
+ path.toString() + "'");
+ return -1;
+ }
+
+ // Make sure these get closed no matter what.
+ AutoHandle hProcess(pi.hProcess);
+ AutoHandle hThread(pi.hThread);
+
+ // Assign the process to a job if a memory limit is defined.
+ AutoHandle hJob(0);
+ if (memoryLimit != 0) {
+ hJob = CreateJobObject(0, 0);
+ bool success = false;
+ if (hJob != 0) {
+ 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 -1;
+ }
+ }
+
+ // Wait for it to terminate.
+ DWORD millisecondsToWait = INFINITE;
+ if (secondsToWait > 0)
+ millisecondsToWait = secondsToWait * 1000;
+
+ if (WaitForSingleObject(pi.hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
+ if (!TerminateProcess(pi.hProcess, 1)) {
+ MakeErrMsg(ErrMsg, std::string("Failed to terminate timed-out program '")
+ + path.toString() + "'");
+ return -1;
+ }
+ WaitForSingleObject(pi.hProcess, INFINITE);
+ }
+
+ // Get its exit status.
+ DWORD status;
+ rc = GetExitCodeProcess(pi.hProcess, &status);
+ err = GetLastError();
+
+ if (!rc) {
+ SetLastError(err);
+ MakeErrMsg(ErrMsg, std::string("Failed getting status for program '") +
+ path.toString() + "'");
+ return -1;
+ }
+
+ return status;
+}
+
+bool Program::ChangeStdinToBinary(){
+ int result = _setmode( _fileno(stdin), _O_BINARY );
+ return result == -1;
+}
+
+bool Program::ChangeStdoutToBinary(){
+ int result = _setmode( _fileno(stdout), _O_BINARY );
+ return result == -1;
+}
+
+}