a78224123e
Root Cause: 1. C7 stride was 1024B, unable to serve 1024B user requests (need 1025B with header) 2. New SuperSlabs start with meta->class_idx=0 (mmap zero-init) 3. superslab_init_slab() only sets class_idx if meta->class_idx==255 4. Multiple code paths used conditional assignment (if class_idx==255), leaving C7 slabs with class_idx=0 5. This caused C7 blocks to be misidentified as C0, leading to HDR_META_MISMATCH errors Changes: 1. Upgrade C7 stride: 1024B → 2048B (can now serve 1024B requests) 2. Update blocks_per_slab[7]: 64 → 32 (2048B stride / 64KB slab) 3. Update size-to-class LUT: entries 513-2048 now map to C7 4. Fix superslab_init_slab() fail-safe: only reinitialize if class_idx==255 (not 0) 5. Add explicit class_idx assignment in 6 initialization paths: - tiny_superslab_alloc.inc.h: superslab_refill() after init - hakmem_tiny_superslab.c: backend_shared after init (main path) - ss_unified_backend_box.c: unconditional assignment - ss_legacy_backend_box.c: explicit assignment - superslab_expansion_box.c: explicit assignment - ss_allocation_box.c: fail-safe condition fix Fix P0 refill bug: - Update obsolete array access after Phase 3d-B TLS SLL unification - g_tls_sll_head[cls] → g_tls_sll[cls].head - g_tls_sll_count[cls] → g_tls_sll[cls].count Results: - HDR_META_MISMATCH: eliminated (0 errors in 100K iterations) - 1024B allocations now routed to C7 (Tiny fast path) - NXT_MISALIGN warnings remain (legacy 1024B SuperSlabs, separate issue) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
#pragma once
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/*
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* box/tiny_next_ptr_box.h
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*
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* Tiny next-pointer Box API (thin wrapper over tiny_nextptr.h)
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*
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* このヘッダは Phase E1-CORRECT で確定した next オフセット仕様に従い、
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* すべての tiny freelist / TLS / fast-cache / refill / SLL が経由すべき
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* 「唯一の Box API」を提供する。
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*
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* 仕様は tiny_nextptr.h と完全一致:
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*
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* HAKMEM_TINY_HEADER_CLASSIDX != 0:
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* - Class 0: next_off = 0 (free中は header を潰す)
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* - Class 1-7: next_off = 1 (headerを保持)
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*
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* HAKMEM_TINY_HEADER_CLASSIDX == 0:
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* - 全クラス: next_off = 0
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*
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* 呼び出し規約:
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* - base: 「内部 box 基底 (header位置または従来base)」
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* - class_idx: size class index (0-7)
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*
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* 禁止事項:
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* - ここを通さずに next オフセットを手計算すること
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* - 直接 *(void**) で next を読む/書くこと
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*/
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#include <stdint.h>
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#include "hakmem_tiny_config.h"
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#include "tiny_nextptr.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Box API: write next pointer
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static inline void tiny_next_write(int class_idx, void *base, void *next_value) {
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tiny_next_store(base, class_idx, next_value);
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}
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// Box API: read next pointer
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static inline void *tiny_next_read(int class_idx, const void *base) {
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return tiny_next_load(base, class_idx);
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}
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/*
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* Greppable macros:
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* - 既存コードは TINY_NEXT_READ/WRITE か tiny_next_read/write を使う。
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* - これらから tiny_nextptr.h 実装へ一元的に到達する。
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*/
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#define TINY_NEXT_WRITE(cls_, base_, next_) tiny_next_write((cls_), (base_), (next_))
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#define TINY_NEXT_READ(cls_, base_) tiny_next_read((cls_), (base_))
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#ifdef __cplusplus
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}
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#endif
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