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77ed72fcf6
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Fix: LIBC/HAKMEM mixed allocation crashes (0% → 80% success)
**Problem**: 4T Larson crashed 100% due to "free(): invalid pointer"
**Root Causes** (6 bugs found via Task Agent ultrathink):
1. **Invalid magic fallback** (`hak_free_api.inc.h:87`)
- When `hdr->magic != HAKMEM_MAGIC`, ptr came from LIBC (no header)
- Was calling `free(raw)` where `raw = ptr - HEADER_SIZE` (garbage!)
- Fixed: Use `__libc_free(ptr)` instead
2. **BigCache eviction** (`hakmem.c:230`)
- Same issue: invalid magic means LIBC allocation
- Fixed: Use `__libc_free(ptr)` directly
3. **Malloc wrapper recursion** (`hakmem_internal.h:209`)
- `hak_alloc_malloc_impl()` called `malloc()` → wrapper recursion
- Fixed: Use `__libc_malloc()` directly
4. **ALLOC_METHOD_MALLOC free** (`hak_free_api.inc.h:106`)
- Was calling `free(raw)` → wrapper recursion
- Fixed: Use `__libc_free(raw)` directly
5. **fopen/fclose crash** (`hakmem_tiny_superslab.c:131`)
- `log_superslab_oom_once()` used `fopen()` → FILE buffer via wrapper
- `fclose()` calls `__libc_free()` on HAKMEM-allocated buffer → crash
- Fixed: Wrap with `g_hakmem_lock_depth++/--` to force LIBC path
6. **g_hakmem_lock_depth visibility** (`hakmem.c:163`)
- Was `static`, needed by hakmem_tiny_superslab.c
- Fixed: Remove `static` keyword
**Result**: 4T Larson success rate improved 0% → 80% (8/10 runs) ✅
**Remaining**: 20% crash rate still needs investigation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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2025-11-07 02:48:20 +09:00 |
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52386401b3
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Debug Counters Implementation - Clean History
Major Features:
- Debug counter infrastructure for Refill Stage tracking
- Free Pipeline counters (ss_local, ss_remote, tls_sll)
- Diagnostic counters for early return analysis
- Unified larson.sh benchmark runner with profiles
- Phase 6-3 regression analysis documentation
Bug Fixes:
- Fix SuperSlab disabled by default (HAKMEM_TINY_USE_SUPERSLAB)
- Fix profile variable naming consistency
- Add .gitignore patterns for large files
Performance:
- Phase 6-3: 4.79 M ops/s (has OOM risk)
- With SuperSlab: 3.13 M ops/s (+19% improvement)
This is a clean repository without large log files.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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2025-11-05 12:31:14 +09:00 |
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