hakmem/core/bench_profile.h

#pragma once
#include <dlfcn.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>

#ifdef USE_HAKMEM
#include "box/wrapper_env_box.h"  // wrapper_env_refresh_from_env (Phase 2 B4)
#include "box/tiny_static_route_box.h"  // tiny_static_route_refresh_from_env (Phase 3 C3)
#include "box/hakmem_env_snapshot_box.h"  // hakmem_env_snapshot_refresh_from_env (Phase 4 E1)
#include "box/tiny_free_route_cache_env_box.h"  // tiny_free_static_route_refresh_from_env (Phase 8)
#endif

// env が未設定のときだけ既定値を入れる
static inline void bench_setenv_default(const char* key, const char* val) {
  if (getenv(key) != NULL) return;
  static void* (*real_malloc)(size_t) = NULL;
  static int (*real_putenv)(char*) = NULL;
  if (!real_malloc) {
    real_malloc = (void* (*)(size_t))dlsym(RTLD_NEXT, "malloc");
    if (!real_malloc) real_malloc = malloc;
  }
  if (!real_putenv) {
    real_putenv = (int (*)(char*))dlsym(RTLD_NEXT, "putenv");
    if (!real_putenv) real_putenv = putenv;
  }
  size_t klen = strlen(key);
  size_t vlen = strlen(val);
  char* buf = (char*)real_malloc(klen + vlen + 2);
  if (!buf) return;
  memcpy(buf, key, klen);
  buf[klen] = '=';
  memcpy(buf + klen + 1, val, vlen);
  buf[klen + 1 + vlen] = '\0';
  {
    char msg[256];
    int n = snprintf(msg, sizeof(msg), "[bench_profile] set %s=%s\n", key, val);
    if (n > 0) {
      if (n > (int)sizeof(msg)) n = (int)sizeof(msg);
      ssize_t w = write(2, msg, (size_t)n);
      (void)w;
    }
  }
  real_putenv(buf);  // takes ownership; do not free
}

// ベンチ専用: HAKMEM_PROFILE に応じて ENV をプリセットする
static inline void bench_apply_profile(void) {
  const char* p = getenv("HAKMEM_PROFILE");
  if (!p || !*p) return;

	if (strcmp(p, "MIXED_TINYV3_C7_SAFE") == 0) {
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C7_HOT", "1");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x80");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_ENABLED", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_CLASSES", "0x0");
    bench_setenv_default("HAKMEM_TINY_PTR_FAST_CLASSIFY_V4_ENABLED", "0");
    bench_setenv_default("HAKMEM_SMALL_SEGMENT_V4_ENABLED", "0");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
    bench_setenv_default("HAKMEM_TINY_FRONT_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_TINY_FRONT_V3_LUT_ENABLED", "1");
    bench_setenv_default("HAKMEM_TINY_PTR_FAST_CLASSIFY_ENABLED", "1");
	    // Phase FREE-TINY-FAST-DUALHOT-1: C0-C3 direct fast free (skip policy snapshot)
	    bench_setenv_default("HAKMEM_FREE_TINY_FAST_HOTCOLD", "1");
	    // Phase 2 B4: Wrapper hot/cold split (malloc/free wrapper shape)
	    bench_setenv_default("HAKMEM_WRAP_SHAPE", "1");
	    // Phase 4 E1: ENV Snapshot Consolidation (+3.92% proven on Mixed)
	    bench_setenv_default("HAKMEM_ENV_SNAPSHOT", "1");
	    // Phase 5 E4-1: Free wrapper ENV snapshot (+3.51% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FREE_WRAPPER_ENV_SNAPSHOT", "1");
	    // Phase 5 E4-2: Malloc wrapper ENV snapshot (+21.83% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_MALLOC_WRAPPER_ENV_SNAPSHOT", "1");
	    // Phase 5 E5-1: Free Tiny Direct Path (+3.35% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FREE_TINY_DIRECT", "1");
	    // Phase 6-1: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FRONT_FASTLANE", "1");
	    // Phase 6-2: Front FastLane Free DeDup (+5.18% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FRONT_FASTLANE_FREE_DEDUP", "1");
	    // Phase 4-4: C6 ULTRA free+alloc 統合を有効化 (default OFF, manual opt-in)
	    bench_setenv_default("HAKMEM_TINY_C6_ULTRA_FREE_ENABLED", "0");
	    // Phase MID-V3: Mid/Pool HotBox v3
	    // Mixed (16–1024B) では MID_V3(C6) が大きく遅くなるため、デフォルト OFF に固定。
	    // C6-heavy プロファイル側でのみ ON を推奨する（C6-heavy のみ最適化対象）。
	    bench_setenv_default("HAKMEM_MID_V3_ENABLED", "0");
	    bench_setenv_default("HAKMEM_MID_V3_CLASSES", "0x0");
		    // Phase 2 B3: Routing branch shape optimization (LIKELY on LEGACY, cold helper for rare routes)
		    bench_setenv_default("HAKMEM_TINY_ALLOC_ROUTE_SHAPE", "1");
		    // Phase 3 C3: Static routing (policy_snapshot bypass, +2.2% proven)
		    bench_setenv_default("HAKMEM_TINY_STATIC_ROUTE", "1");
		    // Phase 3 D1: Free route cache (TLS cache for free path routing, +2.19% proven)
		    bench_setenv_default("HAKMEM_FREE_STATIC_ROUTE", "1");
  } else if (strcmp(p, "C6_HEAVY_LEGACY_POOLV1") == 0) {
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C6_HOT", "0");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x80");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
    bench_setenv_default("HAKMEM_POOL_V1_FLATTEN_ENABLED", "0");
    bench_setenv_default("HAKMEM_MID_DESC_CACHE_ENABLED", "1");
    // Phase 4-4: C6 ULTRA free+alloc 統合を有効化 (default OFF, manual opt-in)
    bench_setenv_default("HAKMEM_TINY_C6_ULTRA_FREE_ENABLED", "0");
    // Phase MID-V3: Mid/Pool HotBox v3 (257-768B, C6 only)
    bench_setenv_default("HAKMEM_MID_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_MID_V3_CLASSES", "0x40");
	    // Phase 6-1: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FRONT_FASTLANE", "1");
	    // Phase 6-2: Front FastLane Free DeDup (+5.18% proven on Mixed, 10-run)
	    bench_setenv_default("HAKMEM_FRONT_FASTLANE_FREE_DEDUP", "1");
	    // Phase 2 B3: Routing branch shape optimization (LIKELY on LEGACY, cold helper for rare routes)
	    bench_setenv_default("HAKMEM_TINY_ALLOC_ROUTE_SHAPE", "1");
  } else if (strcmp(p, "C6_V7_STUB") == 0) {
    // Phase v7-1: C6-only v7 stub 実験用（MID v3 fallback）
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C6_HOT", "0");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x80");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
    bench_setenv_default("HAKMEM_MID_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_MID_V3_CLASSES", "0x40");
    // v7 stub ON (C6-only)
    bench_setenv_default("HAKMEM_SMALL_HEAP_V7_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V7_CLASSES", "0x40");
  } else if (strcmp(p, "C6_HEAVY_LEGACY_POOLV1_FLATTEN") == 0) {
    // LEGACY mid/smallmid ベンチ専用（C7_SAFE では使用しない）
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "LEGACY");
    bench_setenv_default("HAKMEM_TINY_C6_HOT", "0");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x80");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
    bench_setenv_default("HAKMEM_POOL_V1_FLATTEN_ENABLED", "1");
    bench_setenv_default("HAKMEM_POOL_V1_FLATTEN_STATS", "1");
    bench_setenv_default("HAKMEM_POOL_ZERO_MODE", "header");
  } else if (strcmp(p, "DEBUG_TINY_FRONT_PERF") == 0) {
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C7_HOT", "1");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x80");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
    bench_setenv_default("HAKMEM_TINY_FRONT_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_TINY_FRONT_V3_LUT_ENABLED", "1");
    bench_setenv_default("HAKMEM_TINY_PTR_FAST_CLASSIFY_ENABLED", "1");
  } else if (strcmp(p, "C6_SMALL_HEAP_V3_EXPERIMENT") == 0) {
    // C6 を SmallObject v3 に載せる研究用（標準では使用しない）
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C6_HOT", "1");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x40"); // C6 only
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_ENABLED", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_CLASSES", "0x0");
    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
	  } else if (strcmp(p, "C6_SMALL_HEAP_V4_EXPERIMENT") == 0) {
    // C6 を SmallObject v4 に載せる研究用（標準では使用しない）
    bench_setenv_default("HAKMEM_TINY_HEAP_PROFILE", "C7_SAFE");
    bench_setenv_default("HAKMEM_TINY_C6_HOT", "1");
    bench_setenv_default("HAKMEM_TINY_HOTHEAP_V2", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_ENABLED", "0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V3_CLASSES", "0x0");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_ENABLED", "1");
    bench_setenv_default("HAKMEM_SMALL_HEAP_V4_CLASSES", "0x40"); // C6 only
	    bench_setenv_default("HAKMEM_POOL_V2_ENABLED", "0");
	  }

#ifdef USE_HAKMEM
	  // Phase 3 C3 Step 0: Ensure policy snapshot reflects final ENV after putenv defaults.
	  small_policy_v7_bump_version();
	  // Phase 2 B4: Sync wrapper ENV cache after bench_profile putenv defaults.
	  wrapper_env_refresh_from_env();
	  // Phase 3 C3: Sync static route cache after bench_profile putenv defaults.
	  tiny_static_route_refresh_from_env();
	  // Phase 4 E1: Sync ENV snapshot cache after bench_profile putenv defaults.
	  hakmem_env_snapshot_refresh_from_env();
	  // Phase 8: Sync free static route ENV cache after bench_profile putenv defaults.
	  tiny_free_static_route_refresh_from_env();
#endif
	}