Windows 10 dinput8.dll premature deinitialization bug

dinput8-bug-sample.cpp

// Simple test program for Windows 10's dinput8.dll premature deinitialization bug
// Adrian Zdanowicz (Silent), 2019

// This basic program showcases an issue with how dinput8 queues a work item in its own DllMain.
// The issue comes from a fact that unloading dinput8 does not wait for this work item to finish,
// so if it's not quick enough, DLL will get unloaded while a thread pool still executes this work item.

// To observe the crash:
// - With a ready executable, add it to Application Verifier.
// - Uncheck all tests excepts Basic -> Threadpool test and save changes.
// - Launch the executable.
// - Observe it closes.

// So far this issue has been identified with Windows 10 1803, 1809 and 1903.

#include <Windows.h>

int main()
{
	// To keep the sample straightforward, assume LoadLibrary succeeds
	FreeLibrary(LoadLibrary(TEXT("dinput8")));
	for ( ;; ) Sleep(1); // Just wait for the crash now!
}