Described herein are means for debugging byte code in an on-demand service environment system including a system for simulating execution debug in a multi-tenant database environment. Such means may include: receiving a request at a web-server of the system, determining one or more trace preferences are active for the request, sending the request to a logging framework communicatively interfaced to the multi-tenant database implementation, processing the request via the logging framework, and capturing at least a portion of the execution data emitted responsive to execution of the plurality of events for use in simulating execution debug of the events. Other related embodiments are additionally described.