$throw method

void $throw(dynamic exception)

Throw an exception from the VM. This will unwind the stack until a catch block is found.

Implementation

void $throw(dynamic exception) {
  List<int> catchFrame;
  while (true) {
    catchFrame = catchStack.last;
    if (catchFrame.isNotEmpty) {
      break;
    }
    stack.removeLast();
    if (stack.isNotEmpty) {
      frame = stack.last;
      frameOffset = frameOffsetStack.removeLast();
    }

    catchStack.removeLast();
    if (callStack.removeLast() == -1) {
      throw exception is WrappedException
          ? exception
          : WrappedException(exception);
    }
  }
  var catchOffset = catchFrame.removeLast();
  if (catchOffset < 0) {
    rethrowException = exception;
    catchOffset = -catchOffset;
  } else {
    inCatch = true;
  }
  frameOffset = frameOffsetStack.last;
  returnValue =
      exception is WrappedException ? exception.exception : exception;
  _prOffset = catchOffset;
}