shachi/include/shachi/profiler.h (172 lines)

• C99 header implementing SPECTRE Spec 8
• Constants: SH_PROF_MAX_ZONES=32, SH_PROF_AVG_FRAMES=60
• Common zone indices: SH_ZONE_UPDATE=0, TRANSFORM=1, SUBMIT=2, RENDER=3, AUDIO=4, DISC_IO=5, AI=6, PHYSICS=7
• sh_prof_zone_t: name, start_ns, total_ns, worst_ns, call_count, active
• sh_profiler_t: zones[32], frame tracking, 60-frame rolling window, hw counter, overlay_enabled
• Functions: sh_prof_init, sh_prof_frame_begin/end, sh_prof_zone_register/begin/end, SH_PROF_ZONE cleanup macro, sh_prof_avg_frame_us, sh_prof_fps, sh_prof_zone_us, sh_prof_zone_calls, sh_prof_hw_count, sh_prof_print, sh_prof_dump, sh_prof_overlay