a9ddb52ad4
Phase 1 完了：環境変数整理 + fprintf デバッグガード ENV変数削除（BG/HotMag系）: - core/hakmem_tiny_init.inc: HotMag ENV 削除 (~131 lines) - core/hakmem_tiny_bg_spill.c: BG spill ENV 削除 - core/tiny_refill.h: BG remote 固定値化 - core/hakmem_tiny_slow.inc: BG refs 削除 fprintf Debug Guards (#if !HAKMEM_BUILD_RELEASE): - core/hakmem_shared_pool.c: Lock stats (~18 fprintf) - core/page_arena.c: Init/Shutdown/Stats (~27 fprintf) - core/hakmem.c: SIGSEGV init message ドキュメント整理: - 328 markdown files 削除（旧レポート・重複docs） 性能確認: - Larson: 52.35M ops/s (前回52.8M、安定動作✅) - ENV整理による機能影響なし - Debug出力は一部残存（次phase で対応） 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
# Bug Flow Diagram: P0 Batch Refill Active Counter Underflow
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Legend
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- Box 2: Remote Queue (push/drain)
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- Box 3: Ownership (owner_tid)
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- Box 4: Publish/Adopt + Refill boundary (superslab_refill)
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Flow (before fix)
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```
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free(ptr)
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-> Box 2 remote_push (cross-thread)
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- active-- (on free) [OK]
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- goes into SS freelist [no active change]
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refill (P0 batch)
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-> trc_pop_from_freelist(meta, want)
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- splice to TLS SLL [OK]
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- MISSING: active += taken [BUG]
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alloc() uses SLL
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free(ptr) (again)
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-> active-- (but not incremented before) → double-decrement
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-> active underflow → OOM perceived
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-> superslab_refill returns NULL → crash path (free(): invalid pointer)
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```
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After fix
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```
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refill (P0 batch)
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-> trc_pop_from_freelist(...)
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- splice to TLS SLL
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- active += from_freelist [FIX]
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-> trc_linear_carve(...)
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- active += batch [asserted]
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```
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Verification Hooks
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- One-shot OOM prints from superslab_refill
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- Optional: `HAKMEM_TINY_DEBUG_REMOTE_GUARD=1` and `HAKMEM_TINY_TRACE_RING=1`
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