Moldable Exceptions

• URL: http://arxiv.org/abs/2409.00465v1
• Date: Sat, 31 Aug 2024 14:14:22 GMT
• Title: Moldable Exceptions
• Authors: Andrei Chiş, Tudor Gîrba, Oscar Nierstrasz,
• Abstract summary: We introduce "moldable exceptions", a lightweight mechanism to adapt a debugger's interface based on contextual information. We present, through a series of examples, how moldable exceptions can enhance a live programming environment.
• Score: 0.840358257755792
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Debugging is hard. Interactive debuggers are mostly the same. They show you a stack, a way to sample the state of the stack, and, if the debugger is live, a way to step through execution. The standard interactive debugger for a general-purpose programming language provided by a mainstream IDE mostly offers a low-level interface in terms of generic language constructs to track down and fix bugs. A custom debugger, such as those developed for specific application domains, offers alternative interfaces more suitable to the specific execution context of the program being debugged. Custom debuggers offering contextual debugging views and actions can greatly improve our ability to reason about the current problem. Implementing such custom debuggers, however, is non-trivial, and poses a barrier to improving the debugging experience. In this paper we introduce "moldable exceptions", a lightweight mechanism to adapt a debugger's interface based on contextual information provided by a raised exception. We present, through a series of examples, how moldable exceptions can enhance a live programming environment.

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