public void StartProcessAndWaitForDebugger(IEnumerable <String> args)
{
STARTUPINFO si = new STARTUPINFO();
PROCESS_INFORMATION pi = new PROCESS_INFORMATION();
// disable the hook so won't call ourselves recursively
ImageFileExecutionWrapper.SetupHook(imagePath, false);
var sargs = String.Join(" ", args);
sargs = String.Join(" ", "\"" + imagePath + "\"", sargs);
bool success = NativeMethods.CreateProcess(null, sargs, IntPtr.Zero, IntPtr.Zero,
false, ProcessCreationFlags.CREATE_SUSPENDED, IntPtr.Zero, null, ref si, out pi);
// enable the hook again
ImageFileExecutionWrapper.SetupHook(imagePath, true);
if (!success)
{
throw new Win32Exception();
}
var hthread = pi.hThread;
var failuresCnt = 0;
var isDebuggerPresent = false;
while (!isDebuggerPresent)
{
if (failuresCnt > 3)
{
Trace.Write("Too many failures while waiting for the debugger to appear - I give up.");
break;
}
if (!NativeMethods.CheckRemoteDebuggerPresent(pi.hProcess, ref isDebuggerPresent))
{
failuresCnt++;
continue;
}
Thread.Sleep(1000); // sleep for 1s before the next check
}
// resume the process thread
NativeMethods.ResumeThread(hthread);
}
static void Main(string[] args)
{
var result = CommandLine.Parser.Default.ParseArguments <Options>(args);
if (result.Errors.Any())
{
return;
}
if (!IsUserAdmin())
{
Console.WriteLine("You need to be an administrator to use this application.");
return;
}
if (result.Value.ShouldInstall && result.Value.ShouldUninstall)
{
Console.WriteLine("You need to decide whether you would like to install or uninstall a hook.");
return;
}
if (result.Value.ListHooks)
{
ImageFileExecutionWrapper.ListHooks();
return;
}
if (result.Value.Timeout > 0)
{
SetServiceTimeout(result.Value.Timeout);
}
else
{
if (GetServiceTimeout() < 60000)
{
// service will be killed if it does not respond under 1 min.
Console.WriteLine("Warning: current ServicePipeTimeout is set under 1 min - this time might not be enough " +
"to attach with the debugger to the service and start debugging it. It's highly recommended to set this " +
"value to at least 4 min (you may use -timeout option for this purpose)");
}
}
var svcpath = result.Value.ServiceExePath;
if (svcpath == null)
{
Console.WriteLine("A path to the service exe file must be provided.");
return;
}
if (result.Value.ShouldInstall)
{
ImageFileExecutionWrapper.SetupHook(svcpath, true);
}
else if (result.Value.ShouldUninstall)
{
ImageFileExecutionWrapper.SetupHook(svcpath, false);
}
else
{
// here the logic will be a bit more complicated - we will start the process
// as suspended and then wait for the debugger to appear
var s = new Suspender(svcpath);
s.StartProcessAndWaitForDebugger(result.Value.ServiceArgs);
}
}