As applications get developed, bugs inevitably get introduced. Often, it is unclear why a given code change introduced a given bug. To find this causal relation and more effectively debug, developers can leverage the existence of a previous version of the code, without the bug. But traditional debug-ging tools are not designed for this type of work, making this operation tedious. In this article, we propose as exploratory work the echo-debugger, a tool to debug two different executions in parallel, and the Convergence Divergence Mapping (CDM) algorithm to locate all the control-flow divergences and convergences of these executions. In this exploratory work, we present the architecture of the tool and a scenario to solve a non trivial bug.

中文翻译：

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回声调试中的第一个基础设施和实验

随着应用程序的开发，不可避免地会引入错误。通常，不清楚为什么给定的代码更改会引入给定的错误。为了找到这种因果关系并更有效地进行调试，开发人员可以利用没有错误的先前版本代码的存在。但是传统的调试工具并不是为这种类型的工作而设计的，使得这种操作很乏味。在本文中，我们提出了作为探索性工作的 echo-debugger，一种并行调试两个不同执行的工具，以及用于定位这些执行的所有控制流发散和收敛的收敛发散映射 (CDM) 算法。在这项探索性工作中，我们展示了该工具的架构和解决一个重要错误的场景。