detours-test.cpp

#define WIN32_LEAN_AND_MEAN
#include <Windows.h>

#include <detours.h>

#include <mutex>

std::mutex gStartupMutex;
bool gHeapLocked = false;

DWORD WINAPI HeapLockingThreadProc(LPVOID ignored) {
  std::unique_lock lock(gStartupMutex);
  HeapLock(GetProcessHeap());
  gHeapLocked = true;
  while(true) {
    Sleep(1000);
  }
}

DWORD WINAPI SleepingThreadProc(LPVOID ignored) {
  while(true) {
    Sleep(1000);
  }
}


int main() {
  gStartupMutex.lock();
  auto getsLock = CreateThread(nullptr, NULL, &HeapLockingThreadProc, nullptr, NULL, nullptr);
  auto sleeps = CreateThread(nullptr, NULL, &SleepingThreadProc, nullptr, NULL, nullptr);
  gStartupMutex.unlock();
  // spinlock to avoid going anywhere near the heap
  while (!gHeapLocked) {
    YieldProcessor();
  }

  DetourTransactionBegin();
  DetourUpdateThread(getsLock);
  DetourUpdateThread(sleeps);
  DetourTransactionCommit();
  return 0;
}

hang.md