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Examples of errors detected by the V3032 diagnostic


V3032. Waiting on this expression is unreliable, as compiler may optimize some of the variables. Use volatile variable(s) or synchronization primitives to avoid this.

IronPython and IronRuby

V3032 Waiting on this expression is unreliable, as compiler may optimize some of the variables. Use volatile variable(s) or synchronization primitives to avoid this. EngineTest.cs 2558


class DictThreadGlobalState {
  public int DoneCount;
  ....
}

private static void RunThreadTest(
  DictThreadGlobalState globalState) {
  ....
  globalState.DoneEvent.Reset();
  globalState.Event.Set();
  while (globalState.DoneCount != 0) {
    // wait for threads to get back to finish
  }
  ....
}

Xenko

V3032 Waiting on this expression is unreliable, as compiler may optimize some of the variables. Use volatile variable(s) or synchronization primitives to avoid this. SiliconStudio.Xenko.Debugger GameDebuggerTarget.cs 225


private bool requestedExit;
public void MainLoop(IGameDebuggerHost gameDebuggerHost)
{
  ....
  while (!requestedExit)
  {
    Thread.Sleep(10);
  }
}

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Bugs Found

Checked Projects
325
Collected Errors
12 366

Qt

C++ 
int gx = gm.x.toInt();
int gy = gm.y.toInt();
int iw = gm.width.toInt();
int ih = gm.height.toInt();
if (iw <= 0 || iw <= 0)
  return 0;

UnrealEngine

C++ 
switch ( BlendMode )
{
case Opaque:
  BackgroundColor.A = 1.0f;
case Masked:
  BackgroundColor.A = 0.0f;
}

Xamarin

C# 
get {
  return Left == 0 &&
         Top == 0 &&
         Right == 0 &&
         Left == 0;
}

Chromium

C++ 
void Explode(bool is_local,
  Exploded* exploded) const
{
  ....
  ZeroMemory(
    exploded,
    sizeof(exploded));
  ....
}

Qt

C++ 
int gx = gm.x.toInt();
int gy = gm.y.toInt();
int iw = gm.width.toInt();
int ih = gm.height.toInt();
if (iw <= 0 || iw <= 0)
  return 0;

UnrealEngine

C++ 
switch ( BlendMode )
{
case Opaque:
  BackgroundColor.A = 1.0f;
case Masked:
  BackgroundColor.A = 0.0f;
}

Xamarin

C# 
get {
  return Left == 0 &&
         Top == 0 &&
         Right == 0 &&
         Left == 0;
}

Chromium

C++ 
void Explode(bool is_local,
  Exploded* exploded) const
{
  ....
  ZeroMemory(
    exploded,
    sizeof(exploded));
  ....
}
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