RepairAgent: An Autonomous, LLM-Based Agent for Program Repair
CoRR(2024)
摘要
Automated program repair has emerged as a powerful technique to mitigate the
impact of software bugs on system reliability and user experience. This paper
introduces RepairAgent, the first work to address the program repair challenge
through an autonomous agent based on a large language model (LLM). Unlike
existing deep learning-based approaches, which prompt a model with a fixed
prompt or in a fixed feedback loop, our work treats the LLM as an agent capable
of autonomously planning and executing actions to fix bugs by invoking suitable
tools. RepairAgent freely interleaves gathering information about the bug,
gathering repair ingredients, and validating fixes, while deciding which tools
to invoke based on the gathered information and feedback from previous fix
attempts. Key contributions that enable RepairAgent include a set of tools that
are useful for program repair, a dynamically updated prompt format that allows
the LLM to interact with these tools, and a finite state machine that guides
the agent in invoking the tools. Our evaluation on the popular Defects4J
dataset demonstrates RepairAgent's effectiveness in autonomously repairing 164
bugs, including 39 bugs not fixed by prior techniques. Interacting with the LLM
imposes an average cost of 270,000 tokens per bug, which, under the current
pricing of OpenAI's GPT-3.5 model, translates to 14 cents of USD per bug. To
the best of our knowledge, this work is the first to present an autonomous,
LLM-based agent for program repair, paving the way for future agent-based
techniques in software engineering.
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