44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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#ifndef HAKMEM_ALLOC_GATE_STATS_BOX_H
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#define HAKMEM_ALLOC_GATE_STATS_BOX_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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typedef struct AllocGateStats {
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uint64_t total_calls; // malloc_tiny_fast 入口
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uint64_t size_to_class_calls; // size→class 変換
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uint64_t route_for_class_calls; // class→route 判定
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uint64_t env_checks; // alloc-side ENV 判定数
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// クラス別分布
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uint64_t class_calls[8]; // C0〜C7 呼び出し数
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} AllocGateStats;
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// ENV gate
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static inline bool alloc_gate_stats_enabled(void) {
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static int g_enabled = -1;
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if (__builtin_expect(g_enabled == -1, 0)) {
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const char* e = getenv("HAKMEM_ALLOC_GATE_STATS");
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g_enabled = (e && *e && *e != '0') ? 1 : 0;
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}
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return g_enabled;
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}
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// Global stats instance
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extern AllocGateStats g_alloc_gate_stats;
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// Increment macros (with unlikely guard)
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#define ALLOC_GATE_STAT_INC(field) \
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do { if (__builtin_expect(alloc_gate_stats_enabled(), 0)) { \
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g_alloc_gate_stats.field++; \
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} } while(0)
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#define ALLOC_GATE_STAT_INC_CLASS(class_idx) \
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do { if (__builtin_expect(alloc_gate_stats_enabled(), 0)) { \
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if ((class_idx) >= 0 && (class_idx) < 8) g_alloc_gate_stats.class_calls[class_idx]++; \
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} } while(0)
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#endif // HAKMEM_ALLOC_GATE_STATS_BOX_H
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