mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
GetProcessId() was introduced only in Windows XP, and we want to support earlier versions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82548 91177308-0d34-0410-b5e6-96231b3b80d8
383 lines
10 KiB
C++
383 lines
10 KiB
C++
//===- 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 "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 {
|
|
struct Win32ProcessInfo {
|
|
HANDLE hProcess;
|
|
DWORD dwProcessId;
|
|
};
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
unsigned Program::GetPid() const {
|
|
Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
|
|
return wpi->dwProcessId;
|
|
}
|
|
|
|
// 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;
|
|
if (path->isEmpty())
|
|
fname = "NUL";
|
|
else
|
|
fname = path->c_str();
|
|
|
|
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
|
|
|
|
/// 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_) {
|
|
Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
|
|
CloseHandle(wpi->hProcess);
|
|
delete wpi;
|
|
Data_ = 0;
|
|
}
|
|
|
|
if (!path.canExecute()) {
|
|
if (ErrMsg)
|
|
*ErrMsg = "program not executable";
|
|
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 (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 (ArgNeedsQuotes(args[i]))
|
|
len += 2;
|
|
}
|
|
|
|
// Now build the command line.
|
|
char *command = reinterpret_cast<char *>(_alloca(len+1));
|
|
char *p = command;
|
|
|
|
for (unsigned i = 0; args[i]; i++) {
|
|
const char *arg = args[i];
|
|
size_t len = strlen(arg);
|
|
bool needsQuoting = ArgNeedsQuotes(arg);
|
|
if (needsQuoting)
|
|
*p++ = '"';
|
|
memcpy(p, arg, len);
|
|
p += len;
|
|
if (needsQuoting)
|
|
*p++ = '"';
|
|
*p++ = ' ';
|
|
}
|
|
|
|
*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));
|
|
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 false;
|
|
}
|
|
si.hStdOutput = RedirectIO(redirects[1], 1, ErrMsg);
|
|
if (si.hStdOutput == INVALID_HANDLE_VALUE) {
|
|
CloseHandle(si.hStdInput);
|
|
MakeErrMsg(ErrMsg, "can't redirect stdout");
|
|
return false;
|
|
}
|
|
if (redirects[1] && redirects[2] && *(redirects[1]) == *(redirects[2])) {
|
|
// If stdout and stderr should go to the same place, redirect stderr
|
|
// to the handle already open for stdout.
|
|
DuplicateHandle(GetCurrentProcess(), si.hStdOutput,
|
|
GetCurrentProcess(), &si.hStdError,
|
|
0, TRUE, DUPLICATE_SAME_ACCESS);
|
|
} else {
|
|
// Just redirect stderr
|
|
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 false;
|
|
}
|
|
}
|
|
}
|
|
|
|
PROCESS_INFORMATION pi;
|
|
memset(&pi, 0, sizeof(pi));
|
|
|
|
fflush(stdout);
|
|
fflush(stderr);
|
|
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
|
|
// 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.str() + "'");
|
|
return false;
|
|
}
|
|
Win32ProcessInfo* wpi = new Win32ProcessInfo;
|
|
wpi->hProcess = pi.hProcess;
|
|
wpi->dwProcessId = pi.dwProcessId;
|
|
Data_ = wpi;
|
|
|
|
// Make sure these get closed no matter what.
|
|
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 false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int
|
|
Program::Wait(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;
|
|
|
|
// Wait for the process to terminate.
|
|
DWORD millisecondsToWait = INFINITE;
|
|
if (secondsToWait > 0)
|
|
millisecondsToWait = secondsToWait * 1000;
|
|
|
|
if (WaitForSingleObject(hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
|
|
if (!TerminateProcess(hProcess, 1)) {
|
|
MakeErrMsg(ErrMsg, "Failed to terminate timed-out program.");
|
|
return -1;
|
|
}
|
|
WaitForSingleObject(hProcess, INFINITE);
|
|
}
|
|
|
|
// Get its exit status.
|
|
DWORD status;
|
|
BOOL rc = GetExitCodeProcess(hProcess, &status);
|
|
DWORD err = GetLastError();
|
|
|
|
if (!rc) {
|
|
SetLastError(err);
|
|
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;
|
|
}
|
|
|
|
Win32ProcessInfo* wpi = reinterpret_cast<Win32ProcessInfo*>(Data_);
|
|
HANDLE hProcess = wpi->hProcess;
|
|
if (TerminateProcess(hProcess, 1) == 0) {
|
|
MakeErrMsg(ErrMsg, "The process couldn't be killed!");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
}
|