public void CatchBlockOverloadDoesNotUnbalanceTheStack()
{
var method = new DynamicMethod(String.Empty, typeof(void), Type.EmptyTypes);
var generator = method.GetILGenerator();
var il = new ILWriter(generator);
var exceptionBlock = generator.BeginExceptionBlock();
generator.Emit(OpCodes.Leave, exceptionBlock);
il.CatchBlock<Exception>(exceptionBlock, () => { });
il.VerifyStack();
}
public void CatchBlockOverloadDoesNotUnbalanceTheStack()
{
var method = new DynamicMethod(String.Empty, typeof(void), Type.EmptyTypes);
var generator = method.GetILGenerator();
var il = new ILWriter(generator);
var exceptionBlock = generator.BeginExceptionBlock();
generator.Emit(OpCodes.Leave, exceptionBlock);
il.CatchBlock <Exception>(exceptionBlock, () => { });
il.VerifyStack();
}
private IEnumerable <Action <Label> > WriteUnrolledCatchBlocks(ILWriter writer, IImmutableQueue <Type> exceptionTypes, LocalBuilder shouldRetry, LocalBuilder currentExecutionAttempt)
{
var handleException = KnownMetadata.Methods.IExceptionAwareAction_HandleException;
foreach (var exceptionType in exceptionTypes)
{
yield return(endOfTryCatch =>
{
var handleSpecificException = handleException.MakeGenericMethod(exceptionType);
Action catchBlockBody = () =>
{
var endOfCatch = writer.DefineLabel();
var localException = writer.DeclareLocal(exceptionType);
writer.SetLocal(localException);
writer.LoadFirstParameter(); //Exception-aware instance
writer.LoadLocal(localException);
writer.LoadLocal(currentExecutionAttempt);
writer.InstanceMethodCall(handleSpecificException);
//The handler refusing to handle it indicates that we should perform a retry.
var wasHandled = writer.IfFalseThen();
writer.LoadTrue();
writer.SetLocal(shouldRetry);
writer.GoTo(endOfCatch);
writer.MarkLabel(wasHandled);
writer.LoadFalse();
writer.SetLocal(shouldRetry);
writer.MarkLabel(endOfCatch);
};
writer.CatchBlock(exceptionType, endOfTryCatch, catchBlockBody);
});
}
}
