CLion automates ARM Cortex-M hard fault debugging with AI

JetBrains has introduced a new AI-assisted debugging feature in CLion 2026.2.2 specifically designed to diagnose hard faults in ARM Cortex-M embedded development. The tool automatically analyzes fault registers (CFSR, HFSR), memory states, and disassembly when a crash occurs in HardFault_Handler or related exception handlers, pinpointing causes like invalid memory access or stack overflow that traditionally required manual register analysis. The system works across multiple debug probes including Lauterbach TRACE32, Segger J-Link, and ST-LINK through CLion's MCP server infrastructure. Unlike generic AI agents that parse raw debug output, this dedicated tool provides pre-decoded register states, exception frames, and SVD-decoded peripheral register data. When triggered - either automatically during a hard fault or via explicit user request - it outputs specific fault locations and suggested fixes. Current limitations include CLI-only operation with GitHub Copilot, though full functionality is available for Claude Code and Codex agents. The underlying MCP tools also expose general debugging capabilities like memory inspection and breakpoint management for both embedded and desktop C/C++ projects.