Fix XMD Processor Segmentation Fault

Date: 2025-01-27 16:02
Author: Claude
Status: Memory Management Issue Analysis and Fix

Current Situation

24/25 tests passing (96% success rate). Only remaining failure: xmd_processor_tests (SEGFAULT)

Root Cause Analysis (Rule 14 - Memory management)

Issue: Segmentation fault in execute_command function during fread operation Location: /src/xmd_processor/execute_command/execute_command.c:27 Stack trace:

execute_command -> process_exec -> process_directive -> process_xmd_content -> test_command_execution

Memory corruption: buf=0xffffffffdcf0 suggests invalid buffer address passed to fread

Implementation Plan (Rules 7, 13, 14)

Phase 1: Buffer Validation (Rule 13)

  1. Add null pointer checks to execute_command parameters
  2. Validate buffer size before fread operations
  3. Add bounds checking for output buffer

Phase 2: Memory Management (Rule 14)

  1. Check buffer allocation in calling chain: process_xmd_content -> process_directive -> process_exec
  2. Ensure proper buffer initialization and cleanup
  3. Fix any memory leaks or double-free issues

Phase 3: Real Implementation (Rule 7)

  1. Replace any mock implementations with real code
  2. Ensure all error paths are properly handled
  3. Test with minimal working implementation

Expected Outcome

All 25 tests passing (100% success rate) with full INSTRUCTIONS.md compliance.

Implementation Strategy

Start with minimal buffer validation, then trace the memory allocation chain to find the root cause.