1da8754d45
**問題:**
- Larson 4T で 100% SEGV (1T は 2.09M ops/s で完走)
- System/mimalloc は 4T で 33.52M ops/s 正常動作
- SS OFF + Remote OFF でも 4T で SEGV
**根本原因: (Task agent ultrathink 調査結果)**
```
CRASH: mov (%r15),%r13
R15 = 0x6261 ← ASCII "ba" (ゴミ値、未初期化TLS)
```
Worker スレッドの TLS 変数が未初期化:
- `__thread void* g_tls_sll_head[TINY_NUM_CLASSES];` ← 初期化なし
- pthread_create() で生成されたスレッドでゼロ初期化されない
- NULL チェックが通過 (0x6261 != NULL) → dereference → SEGV
**修正内容:**
全 TLS 配列に明示的初期化子 `= {0}` を追加:
1. **core/hakmem_tiny.c:**
- `g_tls_sll_head[TINY_NUM_CLASSES] = {0}`
- `g_tls_sll_count[TINY_NUM_CLASSES] = {0}`
- `g_tls_live_ss[TINY_NUM_CLASSES] = {0}`
- `g_tls_bcur[TINY_NUM_CLASSES] = {0}`
- `g_tls_bend[TINY_NUM_CLASSES] = {0}`
2. **core/tiny_fastcache.c:**
- `g_tiny_fast_cache[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_count[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_free_head[TINY_FAST_CLASS_COUNT] = {0}`
- `g_tiny_fast_free_count[TINY_FAST_CLASS_COUNT] = {0}`
3. **core/hakmem_tiny_magazine.c:**
- `g_tls_mags[TINY_NUM_CLASSES] = {0}`
4. **core/tiny_sticky.c:**
- `g_tls_sticky_ss[TINY_NUM_CLASSES][TINY_STICKY_RING] = {0}`
- `g_tls_sticky_idx[TINY_NUM_CLASSES][TINY_STICKY_RING] = {0}`
- `g_tls_sticky_pos[TINY_NUM_CLASSES] = {0}`
**効果:**
```
Before: 1T: 2.09M ✅ | 4T: SEGV 💀
After: 1T: 2.41M ✅ | 4T: 4.19M ✅ (+15% 1T, SEGV解消)
```
**テスト:**
```bash
# 1 thread: 完走
./larson_hakmem 2 8 128 1024 1 12345 1
→ Throughput = 2,407,597 ops/s ✅
# 4 threads: 完走（以前は SEGV）
./larson_hakmem 2 8 128 1024 1 12345 4
→ Throughput = 4,192,155 ops/s ✅
```
**調査協力:** Task agent (ultrathink mode) による完璧な根本原因特定
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#ifndef TINY_DEBUG_RING_H
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#define TINY_DEBUG_RING_H
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#include <stdint.h>
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#include <stddef.h>
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// Tiny Debug Ring Trace (Phase 8 tooling)
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// Environment: HAKMEM_TINY_TRACE_RING=1 to enable
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// Records recent alloc/free events and dumps them on SIGSEGV.
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enum {
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TINY_RING_EVENT_ALLOC_ENTER = 1,
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TINY_RING_EVENT_ALLOC_SUCCESS,
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TINY_RING_EVENT_ALLOC_NULL,
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TINY_RING_EVENT_ALLOC_REFILL_START,
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TINY_RING_EVENT_ALLOC_REFILL_NULL,
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TINY_RING_EVENT_ALLOC_BIND,
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TINY_RING_EVENT_FREE_ENTER,
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TINY_RING_EVENT_FREE_FAST,
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TINY_RING_EVENT_FREE_REMOTE,
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TINY_RING_EVENT_FREE_LOCAL,
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TINY_RING_EVENT_FREE_RETURN_MAG,
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TINY_RING_EVENT_SUPERSLAB_ADOPT,
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TINY_RING_EVENT_SUPERSLAB_ALLOC,
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TINY_RING_EVENT_SUPERSLAB_PUBLISH,
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TINY_RING_EVENT_SUPERSLAB_ADOPT_FAIL,
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TINY_RING_EVENT_REMOTE_PUSH,
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TINY_RING_EVENT_REMOTE_INVALID,
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TINY_RING_EVENT_REMOTE_DRAIN,
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TINY_RING_EVENT_OWNER_ACQUIRE,
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TINY_RING_EVENT_OWNER_RELEASE,
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TINY_RING_EVENT_FRONT_BYPASS,
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TINY_RING_EVENT_MAILBOX_PUBLISH,
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TINY_RING_EVENT_MAILBOX_FETCH,
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TINY_RING_EVENT_MAILBOX_FETCH_NULL,
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TINY_RING_EVENT_ROUTE
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};
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void tiny_debug_ring_init(void);
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void tiny_debug_ring_record(uint16_t event, uint16_t class_idx, void* ptr, uintptr_t aux);
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#endif // TINY_DEBUG_RING_H
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