//===- Win32/Program.cpp - Win32 Program Implementation ------- -*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
// This file 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 <fcntl.h>
//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only Win32 specific code
+//=== WARNING: Implementation here must contain only Win32 specific code
//=== and must not be UNIX code
//===----------------------------------------------------------------------===//
namespace llvm {
using namespace sys;
+Program::Program() : Data_(0) {}
+
+Program::~Program() {
+ if (Data_) {
+ HANDLE hProcess = reinterpret_cast<HANDLE>(Data_);
+ CloseHandle(hProcess);
+ Data_ = 0;
+ }
+}
+
+unsigned Program::GetPid() {
+ HANDLE hProcess = reinterpret_cast<HANDLE>(Data_);
+ return GetProcessId(hProcess);
+}
+
// This function just uses the PATH environment variable to find the program.
Path
Program::FindProgramByName(const std::string& progName) {
0, TRUE, DUPLICATE_SAME_ACCESS);
return h;
}
-
+
const char *fname;
if (path->isEmpty())
fname = "NUL";
else
- fname = path->toString().c_str();
+ fname = path->c_str();
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(sa);
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) {
+
+/// ArgNeedsQuotes - Check whether argument needs to be quoted when calling
+/// CreateProcess.
+static bool ArgNeedsQuotes(const char *Str) {
+ return Str[0] == '\0' || strchr(Str, ' ') != 0;
+}
+
+bool
+Program::Execute(const Path& path,
+ const char** args,
+ const char** envp,
+ const Path** redirects,
+ unsigned memoryLimit,
+ std::string* ErrMsg) {
+ if (Data_) {
+ HANDLE hProcess = reinterpret_cast<HANDLE>(Data_);
+ CloseHandle(Data_);
+ Data_ = 0;
+ }
+
if (!path.canExecute()) {
if (ErrMsg)
*ErrMsg = "program not executable";
- return -1;
+ return false;
}
// 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.
+ // have embedded spaces (or are empty).
// 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], ' '))
+ if (ArgNeedsQuotes(args[i]))
len += 2;
}
for (unsigned i = 0; args[i]; i++) {
const char *arg = args[i];
size_t len = strlen(arg);
- bool needsQuoting = strchr(arg, ' ') != 0;
+ bool needsQuoting = ArgNeedsQuotes(arg);
if (needsQuoting)
*p++ = '"';
memcpy(p, arg, len);
*p = 0;
+ // The pointer to the environment block for the new process.
+ char *envblock = 0;
+
+ 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.
+
+ // 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;
+ }
+
+ *p = 0;
+ }
+
// Create a child process.
STARTUPINFO si;
memset(&si, 0, sizeof(si));
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;
+ return false;
}
si.hStdOutput = RedirectIO(redirects[1], 1, ErrMsg);
if (si.hStdOutput == INVALID_HANDLE_VALUE) {
CloseHandle(si.hStdInput);
MakeErrMsg(ErrMsg, "can't redirect stdout");
- return -1;
+ return false;
}
if (redirects[1] && redirects[2] && *(redirects[1]) == *(redirects[2])) {
// If stdout and stderr should go to the same place, redirect stderr
CloseHandle(si.hStdInput);
CloseHandle(si.hStdOutput);
MakeErrMsg(ErrMsg, "can't redirect stderr");
- return -1;
+ return false;
}
}
}
-
+
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);
+ BOOL rc = CreateProcess(path.c_str(), command, NULL, NULL, TRUE, 0,
+ envblock, NULL, &si, &pi);
DWORD err = GetLastError();
// Regardless of whether the process got created or not, we are done with
CloseHandle(si.hStdError);
// Now return an error if the process didn't get created.
- if (!rc)
- {
+ if (!rc) {
SetLastError(err);
- MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
- path.toString() + "'");
- return -1;
+ MakeErrMsg(ErrMsg, std::string("Couldn't execute program '") +
+ path.str() + "'");
+ return false;
}
+ Data_ = reinterpret_cast<void*>(pi.hProcess);
// 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.
MakeErrMsg(ErrMsg, std::string("Unable to set memory limit"));
TerminateProcess(pi.hProcess, 1);
WaitForSingleObject(pi.hProcess, INFINITE);
- return -1;
+ return false;
}
}
- // Wait for it to terminate.
+ return true;
+}
+
+int
+Program::Wait(unsigned secondsToWait,
+ std::string* ErrMsg) {
+ if (Data_ == 0) {
+ MakeErrMsg(ErrMsg, "Process not started!");
+ return -1;
+ }
+
+ HANDLE hProcess = reinterpret_cast<HANDLE>(Data_);
+
+ // Wait for the process 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() + "'");
+ if (WaitForSingleObject(hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
+ if (!TerminateProcess(hProcess, 1)) {
+ MakeErrMsg(ErrMsg, "Failed to terminate timed-out program.");
return -1;
}
- WaitForSingleObject(pi.hProcess, INFINITE);
+ WaitForSingleObject(hProcess, INFINITE);
}
-
+
// Get its exit status.
DWORD status;
- rc = GetExitCodeProcess(pi.hProcess, &status);
- err = GetLastError();
+ BOOL rc = GetExitCodeProcess(hProcess, &status);
+ DWORD err = GetLastError();
if (!rc) {
SetLastError(err);
- MakeErrMsg(ErrMsg, std::string("Failed getting status for program '") +
- path.toString() + "'");
+ MakeErrMsg(ErrMsg, "Failed getting status for program.");
return -1;
}
return status;
}
+bool
+Program::Kill(std::string* ErrMsg) {
+ if (Data_ == 0) {
+ MakeErrMsg(ErrMsg, "Process not started!");
+ return true;
+ }
+
+ HANDLE hProcess = reinterpret_cast<HANDLE>(Data_);
+ return TerminateProcess(hProcess, 1);
+}
+
bool Program::ChangeStdinToBinary(){
int result = _setmode( _fileno(stdin), _O_BINARY );
return result == -1;
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