Add defensive layers mapping and diagnostic logging enhancements

Documentation:
- Created docs/DEFENSIVE_LAYERS_MAPPING.md documenting all 5 defensive layers
- Maps which symptoms each layer suppresses
- Defines safe removal order after root cause fix
- Includes test methods for each layer removal

Diagnostic Logging Enhancements (ChatGPT work):
- TLS_SLL_HEAD_SET log with count and backtrace for NORMALIZE_USERPTR
- tiny_next_store_log with filtering capability
- Environment variables for log filtering:
  - HAKMEM_TINY_SLL_NEXTCLS: class filter for next store (-1 disables)
  - HAKMEM_TINY_SLL_NEXTTAG: tag filter (substring match)
  - HAKMEM_TINY_SLL_HEADCLS: class filter for head trace

Current Investigation Status:
- sh8bench 60/120s: crash-free, zero NEXT_INVALID/HDR_RESET/SANITIZE
- BUT: shot limit (256) exhausted by class3 tls_push before class1/drain
- Need: Add tags to pop/clear paths, or increase shot limit for class1

Purpose of this commit:
- Document defensive layers for safe removal later
- Enable targeted diagnostic logging
- Prepare for final root cause identification

Next Steps:
1. Add tags to tls_sll_pop tiny_next_write (e.g., "tls_pop_clear")
2. Re-run with HAKMEM_TINY_SLL_NEXTTAG=tls_pop
3. Capture class1 writes that lead to corruption

🤖 Generated with Claude Code (https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

EXIT_CODE:

@@ -0,0 +1 @@
+/bin/bash: 行 1: MONITOR_PID=: コマンドが見つかりません

EXIT_CODE=

@@ -0,0 +1 @@
+/bin/bash: 行 1: MONITOR_PID=: コマンドが見つかりません

core/box/tls_sll_box.h

@@ -104,6 +104,9 @@ static inline hak_base_ptr_t tls_sll_normalize_base(int class_idx, hak_base_ptr_
                     fprintf(stderr,
                             "[TLS_SLL_NORMALIZE_USERPTR] cls=%d node=%p -> base=%p stride=%zu\n",
                             class_idx, raw, base, stride);
+                    void* bt[16];
+                    int frames = backtrace(bt, 16);
+                    backtrace_symbols_fd(bt, frames, fileno(stderr));
                 }
                 return HAK_BASE_FROM_RAW(base);
             }
@@ -306,9 +309,18 @@ bad:
     return 0;
 }
 
+// Forward decl for head trace (definition below)
+static inline void tls_sll_head_trace(int class_idx,
+                                      void* old_head,
+                                      void* new_head,
+                                      void* from_base,
+                                      const char* stage);
+
 static inline void tls_sll_set_head(int class_idx, hak_base_ptr_t head, const char* stage)
 {
     void* raw = HAK_BASE_TO_RAW(head);
+    void* old_raw = HAK_BASE_TO_RAW(g_tls_sll[class_idx].head);
+    tls_sll_head_trace(class_idx, old_raw, raw, NULL, stage);
     if (!tls_sll_check_node(class_idx, raw, NULL, stage)) {
         abort();
     }
@@ -319,6 +331,8 @@ static inline void tls_sll_set_head(int class_idx, hak_base_ptr_t head, const ch
 static inline void tls_sll_set_head_from(int class_idx, hak_base_ptr_t head, void* from_base, const char* stage)
 {
     void* raw = HAK_BASE_TO_RAW(head);
+    void* old_raw = HAK_BASE_TO_RAW(g_tls_sll[class_idx].head);
+    tls_sll_head_trace(class_idx, old_raw, raw, from_base, stage);
     if (!tls_sll_check_node(class_idx, raw, from_base, stage)) {
         abort();
     }
@@ -396,6 +410,84 @@ static inline void tls_sll_diag_next(int class_idx, hak_base_ptr_t base, hak_bas
 #endif
 }
 
+// Optional: trace head writes to locate corruption sources (env: HAKMEM_TINY_SLL_HEADLOG=1)
+static inline void tls_sll_fetch_ptr_info(void* p, SuperSlab** out_ss, int* out_idx, uint8_t* out_cls)
+{
+    SuperSlab* ss = hak_super_lookup(p);
+    int cap = ss ? ss_slabs_capacity(ss) : 0;
+    int idx = (ss && ss->magic == SUPERSLAB_MAGIC) ? slab_index_for(ss, p) : -1;
+    uint8_t cls = (idx >= 0 && idx < cap) ? ss->slabs[idx].class_idx : 0xff;
+    if (out_ss) *out_ss = ss;
+    if (out_idx) *out_idx = idx;
+    if (out_cls) *out_cls = cls;
+}
+
+static inline void tls_sll_head_trace(int class_idx,
+                                      void* old_head,
+                                      void* new_head,
+                                      void* from_base,
+                                      const char* stage)
+{
+    static int g_headlog_en = 1;  // default ON for triage; disable with HAKMEM_TINY_SLL_HEADLOG=0
+    static int g_headlog_cls = -2;  // -1 = no filter; >=0 only that class
+    if (__builtin_expect(g_headlog_en == -1, 0)) {
+        const char* e = getenv("HAKMEM_TINY_SLL_HEADLOG");
+        g_headlog_en = (e && *e && *e != '0') ? 1 : 0;
+    } else {
+        const char* e = getenv("HAKMEM_TINY_SLL_HEADLOG");
+        if (e && *e == '0') g_headlog_en = 0;
+    }
+    if (g_headlog_cls == -2) {
+        const char* c = getenv("HAKMEM_TINY_SLL_HEADCLS");
+        if (c && *c) {
+            g_headlog_cls = atoi(c);
+        } else {
+            g_headlog_cls = -1;
+        }
+    }
+    if (!__builtin_expect(g_headlog_en, 0)) return;
+    if (g_headlog_cls >= 0 && class_idx != g_headlog_cls) return;
+
+    static _Atomic uint32_t g_headlog_shot = 0;
+    uint32_t shot = atomic_fetch_add_explicit(&g_headlog_shot, 1, memory_order_relaxed);
+    if (shot >= 256) return;
+
+    uint32_t count_before = 0;
+    if (class_idx >= 0 && class_idx < TINY_NUM_CLASSES) {
+        count_before = g_tls_sll[class_idx].count;
+    }
+
+    SuperSlab *new_ss = NULL, *old_ss = NULL, *from_ss = NULL;
+    int new_idx = -1, old_idx = -1, from_idx = -1;
+    uint8_t new_cls = 0xff, old_cls = 0xff, from_cls = 0xff;
+    tls_sll_fetch_ptr_info(new_head, &new_ss, &new_idx, &new_cls);
+    tls_sll_fetch_ptr_info(old_head, &old_ss, &old_idx, &old_cls);
+    tls_sll_fetch_ptr_info(from_base, &from_ss, &from_idx, &from_cls);
+
+    fprintf(stderr,
+            "[TLS_SLL_HEAD_SET] shot=%u stage=%s cls=%d count=%u old=%p new=%p from=%p "
+            "new_ss=%p new_idx=%d new_cls=%u old_ss=%p old_idx=%d old_cls=%u "
+            "from_ss=%p from_idx=%d from_cls=%u last_writer=%s last_push=%p\n",
+            shot + 1,
+            stage ? stage : "(null)",
+            class_idx,
+            (unsigned)count_before,
+            old_head,
+            new_head,
+            from_base,
+            (void*)new_ss,
+            new_idx,
+            (unsigned)new_cls,
+            (void*)old_ss,
+            old_idx,
+            (unsigned)old_cls,
+            (void*)from_ss,
+            from_idx,
+            (unsigned)from_cls,
+            g_tls_sll_last_writer[class_idx] ? g_tls_sll_last_writer[class_idx] : "(null)",
+            HAK_BASE_TO_RAW(s_tls_sll_last_push[class_idx]));
+}
+
 // ========== Push ==========
 //
 // Push BASE pointer into TLS SLL for given class.

core/hakmem_shared_pool_release.c

@@ -74,6 +74,24 @@ shared_pool_release_slab(SuperSlab* ss, int slab_idx)
 
     uint8_t class_idx = slab_meta->class_idx;
 
+    // Guard: if SuperSlab is pinned (TLS/remote references), defer release to avoid
+    // class_map=255 while pointers are still in-flight.
+    uint32_t ss_refs_guard = superslab_ref_get(ss);
+    if (ss_refs_guard != 0) {
+#if !HAKMEM_BUILD_RELEASE
+        if (dbg == 1) {
+            fprintf(stderr,
+                    "[SP_SLOT_RELEASE_SKIP_PINNED] ss=%p slab_idx=%d class=%d refcount=%u\n",
+                    (void*)ss, slab_idx, class_idx, (unsigned)ss_refs_guard);
+        }
+#endif
+        if (g_lock_stats_enabled == 1) {
+            atomic_fetch_add(&g_lock_release_count, 1);
+        }
+        pthread_mutex_unlock(&g_shared_pool.alloc_lock);
+        return;
+    }
+
     #if !HAKMEM_BUILD_RELEASE
     if (dbg == 1) {
         fprintf(stderr, "[SP_SLOT_RELEASE] ss=%p slab_idx=%d class=%d used=0 (marking EMPTY)\n",

core/ptr_trace.h

@@ -116,6 +116,12 @@ static inline void ptr_trace_dump_now(const char* reason) { (void)reason; }
 // Box API handles offset calculation internally based on class_idx.
 // `off` は呼び出し元互換用に受け取るが、アドレス計算には使わない（ログ専用）。
 #define PTR_NEXT_WRITE(tag, cls, node, off, value) do {                \
+    g_tiny_next_tag = (tag);                                           \
+    g_tiny_next_file = __FILE__;                                       \
+    g_tiny_next_line = __LINE__;                                       \
+    g_tiny_next_ra0 = __builtin_return_address(0);                     \
+    g_tiny_next_ra1 = __builtin_return_address(1);                     \
+    g_tiny_next_ra2 = __builtin_return_address(2);                     \
     (void)(off);                                                       \
     tiny_next_write((cls), (node), (value));                           \
     ptr_trace_record((tag), (cls), (node), (value), (size_t)(off));    \
@@ -134,8 +140,17 @@ static inline void ptr_trace_dump_now(const char* reason) { (void)reason; }
 
 // Phase E1-CORRECT: Use Box API for all next pointer operations (Release mode)
 // `off` は互換用のダミーで、Box API が offset を決定する。
-#define PTR_NEXT_WRITE(tag, cls, node, off, value) \
+#define PTR_NEXT_WRITE(tag, cls, node, off, value)                     \
-    do { (void)(tag); (void)(off); tiny_next_write((cls), (node), (value)); } while (0)
+    do {                                                               \
+        g_tiny_next_tag = (tag);                                       \
+        g_tiny_next_file = __FILE__;                                   \
+        g_tiny_next_line = __LINE__;                                   \
+        g_tiny_next_ra0 = __builtin_return_address(0);                 \
+        g_tiny_next_ra1 = __builtin_return_address(1);                 \
+        g_tiny_next_ra2 = __builtin_return_address(2);                 \
+        (void)(tag); (void)(off);                                      \
+        tiny_next_write((cls), (node), (value));                       \
+    } while (0)
 
 #define PTR_NEXT_READ(tag, cls, node, off, out_var) \
     do { (void)(tag); (void)(off); (out_var) = tiny_next_read((cls), (node)); } while (0)

core/tiny_free_fast.inc.h

@@ -221,7 +221,8 @@ static inline void tiny_free_fast(void* ptr) {
             int slab_idx = slab_index_for(ss, ptr);
 
             // Convert USER → BASE for tiny_free_fast_ss (needed for next pointer operations)
-            void* base = (void*)((uint8_t*)ptr - tiny_user_offset(hak_slab_class(hak_slab_from_superslab(ss, slab_idx))));
+            int class_idx = tiny_get_class_from_ss(ss, slab_idx);
+            void* base = (void*)((uint8_t*)ptr - tiny_user_offset(class_idx));
             uint32_t self_tid = tiny_self_u32();
 
             // Box 6 Boundary: Try same-thread fast path

core/tiny_nextptr.h

@@ -47,6 +47,14 @@
 #include "box/tiny_layout_box.h"
 #include "box/tiny_header_box.h"
 
+// Per-thread trace context injected by PTR_NEXT_WRITE macro (for triage)
+static __thread const char* g_tiny_next_tag = NULL;
+static __thread const char* g_tiny_next_file = NULL;
+static __thread int g_tiny_next_line = 0;
+static __thread void* g_tiny_next_ra0 = NULL;
+static __thread void* g_tiny_next_ra1 = NULL;
+static __thread void* g_tiny_next_ra2 = NULL;
+
 // Compute freelist next-pointer offset within a block for the given class.
 // P0.1 updated: C0 and C7 use offset 0, C1-C6 use offset 1 (header preserved)
 // Rationale for C0: 8B stride cannot fit [1B header][8B next pointer] without overflow
@@ -54,6 +62,90 @@ static inline __attribute__((always_inline)) size_t tiny_next_off(int class_idx)
     return tiny_user_offset(class_idx);
 }
 
+// Optional: log next-pointer writes for triage (env: HAKMEM_TINY_SLL_HEADLOG=1)
+static inline void tiny_next_store_log(int class_idx, void* base, void* next, size_t off)
+{
+    static int g_nextlog_en = 1;  // default ON for triage; disable with HAKMEM_TINY_SLL_HEADLOG=0
+    static int g_nextlog_env_checked = 0;
+    static int g_nextlog_cls = -2;  // -1 = no filter; >=0 = only that class
+    static const char* g_nextlog_tag_filter = NULL;  // substring match; NULL = no filter
+    if (!g_nextlog_env_checked) {
+        const char* e = getenv("HAKMEM_TINY_SLL_HEADLOG");
+        if (e && *e == '0') {
+            g_nextlog_en = 0;
+        }
+        const char* c = getenv("HAKMEM_TINY_SLL_NEXTCLS");
+        if (c && *c) {
+            g_nextlog_cls = atoi(c);
+        } else {
+            g_nextlog_cls = -1;
+        }
+        g_nextlog_tag_filter = getenv("HAKMEM_TINY_SLL_NEXTTAG");
+        g_nextlog_env_checked = 1;
+    }
+    if (!__builtin_expect(g_nextlog_en, 0)) return;
+    if (g_nextlog_cls >= 0 && class_idx != g_nextlog_cls) return;
+
+    // Pull tag/callsite from TLS and clear immediately to avoid stale reuse
+    const char* tag = g_tiny_next_tag;
+    const char* file = g_tiny_next_file;
+    int line = g_tiny_next_line;
+    void* ra0 = g_tiny_next_ra0;
+    void* ra1 = g_tiny_next_ra1;
+    void* ra2 = g_tiny_next_ra2;
+    g_tiny_next_tag = NULL;
+    g_tiny_next_file = NULL;
+    g_tiny_next_line = 0;
+    g_tiny_next_ra0 = NULL;
+    g_tiny_next_ra1 = NULL;
+    g_tiny_next_ra2 = NULL;
+    if (!tag) return;
+    if (g_nextlog_tag_filter && !strstr(tag, g_nextlog_tag_filter)) return;
+
+    static _Atomic uint32_t g_nextlog_shot = 0;
+    uint32_t shot = atomic_fetch_add_explicit(&g_nextlog_shot, 1, memory_order_relaxed);
+    if (shot >= 256) return;
+
+    SuperSlab* ss = hak_super_lookup(base);
+    int cap = ss ? ss_slabs_capacity(ss) : 0;
+    int idx = (ss && ss->magic == SUPERSLAB_MAGIC) ? slab_index_for(ss, base) : -1;
+    uint8_t cls = (idx >= 0 && idx < cap) ? ss->slabs[idx].class_idx : 0xff;
+    void* ra = __builtin_return_address(0);
+    fprintf(stderr,
+            "[TINY_NEXT_STORE] shot=%u cls=%d base=%p next=%p off=%zu ss=%p idx=%d meta_cls=%u caller=%p tag=%s site=%s:%d ra0=%p ra1=%p ra2=%p\n",
+            shot + 1,
+            class_idx,
+            base,
+            next,
+            off,
+            (void*)ss,
+            idx,
+            (unsigned)cls,
+            ra,
+            tag,
+            file,
+            line,
+            ra0,
+            ra1,
+            ra2);
+    // Early frames for offline addr2line when caller symbols are missing
+    if (shot < 24) {
+        void* bt[16];
+        int frames = backtrace(bt, 16);
+        backtrace_symbols_fd(bt, frames, fileno(stderr));
+    }
+    // Backtrace only for clearly misaligned bases (likely user pointers)
+    if (((uintptr_t)base & 0xF) != 0) {
+        static _Atomic uint32_t g_next_bt = 0;
+        uint32_t bt_shot = atomic_fetch_add_explicit(&g_next_bt, 1, memory_order_relaxed);
+        if (bt_shot < 8) {
+            void* bt[16];
+            int frames = backtrace(bt, 16);
+            backtrace_symbols_fd(bt, frames, fileno(stderr));
+        }
+    }
+}
+
 // Safe load of next pointer from a block base.
 static inline __attribute__((always_inline)) void* tiny_next_load(const void* base, int class_idx) {
     size_t off = tiny_next_off(class_idx);
@@ -109,12 +201,14 @@ static inline __attribute__((always_inline)) void tiny_next_store(void* base, in
     if (off == 0) {
         // Aligned access at base (overwrites header for C7).
         *(void**)base = next;
+        tiny_next_store_log(class_idx, base, next, off);
         return;
     }
 
     // off != 0: use memcpy for portability / UB-avoidance.
     uint8_t* p = (uint8_t*)base + off;
     memcpy(p, &next, sizeof(void*));
+    tiny_next_store_log(class_idx, base, next, off);
 }
 
 #endif // TINY_NEXTPTR_H

docs/DEFENSIVE_LAYERS_MAPPING.md

@@ -0,0 +1,239 @@
+# 対処療法マッピング (2025-12-03)
+
+**目的**: 根本原因が特定された後、安全に対処療法を外すための記録
+
+---
+
+## 現在の対処療法（5層 + 診断ログ）
+
+### Layer 1: SuperSlab Refcount Pinning
+
+**場所**: `core/box/tls_sll_box.h`
+
+**実装**:
+```c
+// tls_sll_push_impl():
+SuperSlab* ss = hak_super_lookup(ptr);
+if (ss) atomic_fetch_add(&ss->refcount, 1);  // PIN
+
+// tls_sll_pop_impl():
+SuperSlab* ss = hak_super_lookup(ptr);
+if (ss) atomic_fetch_sub(&ss->refcount, 1);  // UNPIN
+```
+
+**目的**: TLS SLL がポイントしてる SuperSlab が解放されるのを防ぐ
+
+**隠蔽される症状**:
+- Use-After-Free（SuperSlab が free された後のアクセス）
+- [TLS_SLL_HDR_RESET] の一部
+
+**削除時のリスク**:
+- SuperSlab が参照中に解放される
+- SIGSEGV の再発
+
+**テスト方法**:
+- Layer 1 を無効化 → sh8bench 60秒
+- [TLS_SLL_HDR_RESET] / SIGSEGV が発生するか確認
+
+---
+
+### Layer 2: SuperSlab Release Guards
+
+**場所**:
+- `core/superslab_allocate.c` (superslab_free)
+- `core/hakmem_shared_pool_release.c` (shared_pool_release_slab)
+- `core/box/ss_allocation_box.c`
+
+**実装**:
+```c
+// superslab_free():
+if (ss->refcount > 0) {
+    return;  // DEFER - do not free
+}
+```
+
+**目的**: refcount > 0 の SuperSlab を解放しない
+
+**隠蔽される症状**:
+- class_map が 255 (UNASSIGNED) になる
+- meta_cls=255 ログ
+
+**削除時のリスク**:
+- class_map が書き換わる
+- TLS SLL の class_idx ミスマッチ
+
+**テスト方法**:
+- Layer 2 を無効化 → sh8bench 60秒
+- [TLS_SLL_NEXT_INVALID] + meta_cls=255 が増えるか確認
+
+---
+
+### Layer 3: TLS SLL Next Pointer Validation
+
+**場所**: `core/box/tls_sll_box.h`
+
+**実装**:
+```c
+// tls_sll_pop_impl() での next pointer traversal:
+if (!is_valid_pointer(next)) {
+    fprintf(stderr, "[TLS_SLL_NEXT_INVALID] ...");
+    g_tls_sll[class_idx].head = NULL;  // DROP
+}
+```
+
+**目的**: 無効な next ポインタを検知して早期にリストを DROP
+
+**隠蔽される症状**:
+- Freelist corruption
+- 次ポインタが別領域を指す
+
+**削除時のリスク**:
+- 無効なポインタが dereference される
+- SIGSEGV
+
+**テスト方法**:
+- Layer 3 を無効化 → sh8bench 60秒
+- SIGSEGV が発生するか確認
+
+---
+
+### Layer 4: Unified Cache Freelist Validation
+
+**場所**: `core/front/tiny_unified_cache.c`
+
+**実装**:
+```c
+// unified_cache_refill():
+if (!is_valid_slab(head)) {
+    fprintf(stderr, "[UNIFIED_FREELIST_INVALID] ...");
+    freelist[i] = NULL;  // DROP
+}
+```
+
+**目的**: 無効な freelist head を検知して DROP
+
+**隠蔽される症状**:
+- freelist が別スラブを指す
+- スラブ境界を越えたリンク
+
+**削除時のリスク**:
+- 不正なブロックが割り当てられる
+- メモリ破壊
+
+**テスト方法**:
+- Layer 4 を無効化 → sh8bench 60秒
+- [UNIFIED_FREELIST_INVALID] が増えるか確認
+
+---
+
+### Layer 5: Early Decrement Fix
+
+**場所**: `core/tiny_free_fast.inc.h`
+
+**実装**:
+```c
+// 削除された行:
+// ss_active_dec_one(ss);  // 高速パスでの早期デクリメント
+```
+
+**目的**: refcount の過剰デクリメントを防止
+
+**隠蔽される症状**:
+- refcount が 0 に早く落ちすぎる
+- Layer 1/2 のガードが効かなくなる
+
+**削除時のリスク**:
+- Layer 1/2 の効果が無効化される
+
+**テスト方法**:
+- 早期デクリメントを復元 → sh8bench 60秒
+- refcount が早く 0 になり、SIGSEGV が発生するか確認
+
+---
+
+### 診断ログ追加
+
+**場所**: `core/box/tls_sll_box.h`, 各所
+
+**追加されたログ**:
+- `[TLS_SLL_HEAD_SET]` - head 設定時のトレース
+- `[TLS_SLL_NEXT_INVALID]` - 無効な next ポインタ検知
+- `[UNIFIED_FREELIST_INVALID]` - freelist head 無効
+- `[TLS_SLL_NORMALIZE_USERPTR]` - userptr の正規化
+- `[TLS_SLL_SANITIZE]` - head の検証と修復
+- `[TINY_NEXT_STORE]` - next ポインタ書き込みのトレース
+
+**フィルタ環境変数**:
+- `HAKMEM_TINY_SLL_NEXTCLS` - next store のクラスフィルタ (-1 で無効)
+- `HAKMEM_TINY_SLL_NEXTTAG` - next store のタグフィルタ (部分一致)
+- `HAKMEM_TINY_SLL_HEADCLS` - head trace のクラスフィルタ
+
+---
+
+## 根本修正後の削除順序（推奨）
+
+### Phase 1: 診断ログを維持しながら確認
+
+1. 根本修正を適用
+2. sh8bench 60秒テスト
+3. 診断ログが**ゼロ**になることを確認
+
+### Phase 2: Validation layers (Layer 3/4) を削除
+
+1. Layer 3 (next validation) を無効化
+2. sh8bench 60秒テスト
+3. [TLS_SLL_NEXT_INVALID] がゼロ（本当に発生しない）ことを確認
+4. Layer 4 (freelist validation) を無効化
+5. sh8bench 60秒テスト
+6. 問題がないことを確認
+
+### Phase 3: Refcount layers (Layer 1/2) を削除
+
+1. Layer 2 (release guards) を無効化
+2. sh8bench 60秒テスト
+3. class_map が正常に動作することを確認
+4. Layer 1 (refcount pinning) を無効化
+5. sh8bench 60秒テスト
+6. SuperSlab lifecycle が正常であることを確認
+
+### Phase 4: 診断ログを削除
+
+1. ショット制限を復元（または ENV で無効化）
+2. パフォーマンステスト
+3. オーバーヘッドがないことを確認
+
+---
+
+## 削除チェックリスト
+
+| Layer | ファイル | 行 | 削除方法 | テスト |
+|-------|---------|-----|---------|--------|
+| 1 | tls_sll_box.h | push/pop | atomic_fetch_add/sub を削除 | sh8bench 60s |
+| 2 | superslab_allocate.c | superslab_free | if (refcount>0) return を削除 | sh8bench 60s |
+| 2 | shared_pool_release.c | release_slab | 同上 | sh8bench 60s |
+| 2 | ss_allocation_box.c | 各所 | 同上 | sh8bench 60s |
+| 3 | tls_sll_box.h | pop | validation + DROP を削除 | sh8bench 60s |
+| 4 | tiny_unified_cache.c | refill | validation + DROP を削除 | sh8bench 60s |
+| 5 | tiny_free_fast.inc.h | - | 既に削除済み（復元しない） | - |
+
+---
+
+## 注意事項
+
+1. **一度に全部外さない** - 1層ずつ外してテスト
+2. **ログは最後に外す** - 問題が再発したら診断できるように
+3. **テストは複数回** - タイミング依存の問題がある可能性
+4. **メモリ監視も継続** - RSS が増加しないことを確認
+
+---
+
+## 関連ドキュメント
+
+- `docs/ANALYSIS_SYMPTOM_PROLIFERATION.md` - 対処療法の分析
+- `docs/BREAKTHROUGH_STABILITY_ACHIEVED.md` - 安定性達成の報告
+- `docs/CRITICAL_DISCOVERY_TLS_HEAD_CORRUPTION.md` - TLS head 汚染の発見
+
+---
+
+*Document created: 2025-12-03*
+*Purpose: Enable safe removal of defensive layers after root cause fix*

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