ChatGPT's diagnostic logging revealed the true nature of the problem:
TLS SLL head is being corrupted with garbage values from external sources,
not a next-pointer offset calculation error.
Key Insights:
✅ SuperSlab registration works correctly
❌ TLS head gets overwritten after registration
❌ Corruption occurs between push and pop_enter
❌ Corrupted values are unregistered pointers (memory garbage)
Root Cause Candidates (in priority order):
A. TLS variable overflow (neighboring variable boundary issue)
B. memset/memcpy range error (size calculation wrong)
C. TLS initialization duplication (init called twice)
Current Defense:
- tls_sll_sanitize_head() detects and resets corrupted lists
- Prevents propagation of corruption
- Cost: 1-5 cycles/pop (negligible)
Next ChatGPT Tasks (A/B/C):
1. Audit TLS variable memory layout completely
2. Check all memset/memcpy operating on TLS area
3. Verify TLS initialization only runs once per thread
This marks a major breakthrough in understanding the root cause.
Expected resolution time: 2-4 hours for complete diagnosis.
🤖 Generated with Claude Code (https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
