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annotate third_party/luajit/src/lj_gc.h @ 178:94705b5986b3

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[ThirdParty] Added WRK and luajit for load testing.
author MrJuneJune <me@mrjunejune.com>
date Thu, 22 Jan 2026 20:10:30 -0800
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178
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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1 /*
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2 ** Garbage collector.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #ifndef _LJ_GC_H
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7 #define _LJ_GC_H
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8
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9 #include "lj_obj.h"
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10
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11 /* Garbage collector states. Order matters. */
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12 enum {
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13 GCSpause, GCSpropagate, GCSatomic, GCSsweepstring, GCSsweep, GCSfinalize
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14 };
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15
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16 /* Bitmasks for marked field of GCobj. */
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17 #define LJ_GC_WHITE0 0x01
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18 #define LJ_GC_WHITE1 0x02
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19 #define LJ_GC_BLACK 0x04
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20 #define LJ_GC_FINALIZED 0x08
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21 #define LJ_GC_WEAKKEY 0x08
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22 #define LJ_GC_WEAKVAL 0x10
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23 #define LJ_GC_CDATA_FIN 0x10
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24 #define LJ_GC_FIXED 0x20
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25 #define LJ_GC_SFIXED 0x40
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26
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27 #define LJ_GC_WHITES (LJ_GC_WHITE0 | LJ_GC_WHITE1)
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28 #define LJ_GC_COLORS (LJ_GC_WHITES | LJ_GC_BLACK)
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29 #define LJ_GC_WEAK (LJ_GC_WEAKKEY | LJ_GC_WEAKVAL)
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30
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31 /* Macros to test and set GCobj colors. */
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32 #define iswhite(x) ((x)->gch.marked & LJ_GC_WHITES)
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33 #define isblack(x) ((x)->gch.marked & LJ_GC_BLACK)
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34 #define isgray(x) (!((x)->gch.marked & (LJ_GC_BLACK|LJ_GC_WHITES)))
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35 #define tviswhite(x) (tvisgcv(x) && iswhite(gcV(x)))
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36 #define otherwhite(g) (g->gc.currentwhite ^ LJ_GC_WHITES)
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37 #define isdead(g, v) ((v)->gch.marked & otherwhite(g) & LJ_GC_WHITES)
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38
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39 #define curwhite(g) ((g)->gc.currentwhite & LJ_GC_WHITES)
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40 #define newwhite(g, x) (obj2gco(x)->gch.marked = (uint8_t)curwhite(g))
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41 #define makewhite(g, x) \
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42 ((x)->gch.marked = ((x)->gch.marked & (uint8_t)~LJ_GC_COLORS) | curwhite(g))
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43 #define flipwhite(x) ((x)->gch.marked ^= LJ_GC_WHITES)
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44 #define black2gray(x) ((x)->gch.marked &= (uint8_t)~LJ_GC_BLACK)
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45 #define fixstring(s) ((s)->marked |= LJ_GC_FIXED)
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46 #define markfinalized(x) ((x)->gch.marked |= LJ_GC_FINALIZED)
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47
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48 /* Collector. */
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49 LJ_FUNC size_t lj_gc_separateudata(global_State *g, int all);
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50 LJ_FUNC void lj_gc_finalize_udata(lua_State *L);
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51 #if LJ_HASFFI
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52 LJ_FUNC void lj_gc_finalize_cdata(lua_State *L);
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53 #else
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54 #define lj_gc_finalize_cdata(L) UNUSED(L)
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55 #endif
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56 LJ_FUNC void lj_gc_freeall(global_State *g);
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57 LJ_FUNCA int LJ_FASTCALL lj_gc_step(lua_State *L);
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58 LJ_FUNCA void LJ_FASTCALL lj_gc_step_fixtop(lua_State *L);
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59 #if LJ_HASJIT
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60 LJ_FUNC int LJ_FASTCALL lj_gc_step_jit(global_State *g, MSize steps);
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61 #endif
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62 LJ_FUNC void lj_gc_fullgc(lua_State *L);
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63
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64 /* GC check: drive collector forward if the GC threshold has been reached. */
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65 #define lj_gc_check(L) \
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66 { if (LJ_UNLIKELY(G(L)->gc.total >= G(L)->gc.threshold)) \
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67 lj_gc_step(L); }
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68 #define lj_gc_check_fixtop(L) \
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69 { if (LJ_UNLIKELY(G(L)->gc.total >= G(L)->gc.threshold)) \
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70 lj_gc_step_fixtop(L); }
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71
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72 /* Write barriers. */
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73 LJ_FUNC void lj_gc_barrierf(global_State *g, GCobj *o, GCobj *v);
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74 LJ_FUNCA void LJ_FASTCALL lj_gc_barrieruv(global_State *g, TValue *tv);
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75 LJ_FUNC void lj_gc_closeuv(global_State *g, GCupval *uv);
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76 #if LJ_HASJIT
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77 LJ_FUNC void lj_gc_barriertrace(global_State *g, uint32_t traceno);
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78 #endif
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79
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80 /* Move the GC propagation frontier back for tables (make it gray again). */
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81 static LJ_AINLINE void lj_gc_barrierback(global_State *g, GCtab *t)
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82 {
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83 GCobj *o = obj2gco(t);
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84 lj_assertG(isblack(o) && !isdead(g, o),
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85 "bad object states for backward barrier");
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86 lj_assertG(g->gc.state != GCSfinalize && g->gc.state != GCSpause,
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87 "bad GC state");
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88 black2gray(o);
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89 setgcrefr(t->gclist, g->gc.grayagain);
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90 setgcref(g->gc.grayagain, o);
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91 }
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92
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93 /* Barrier for stores to table objects. TValue and GCobj variant. */
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94 #define lj_gc_anybarriert(L, t) \
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95 { if (LJ_UNLIKELY(isblack(obj2gco(t)))) lj_gc_barrierback(G(L), (t)); }
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96 #define lj_gc_barriert(L, t, tv) \
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97 { if (tviswhite(tv) && isblack(obj2gco(t))) \
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98 lj_gc_barrierback(G(L), (t)); }
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99 #define lj_gc_objbarriert(L, t, o) \
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100 { if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) \
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101 lj_gc_barrierback(G(L), (t)); }
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102
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103 /* Barrier for stores to any other object. TValue and GCobj variant. */
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104 #define lj_gc_barrier(L, p, tv) \
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105 { if (tviswhite(tv) && isblack(obj2gco(p))) \
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106 lj_gc_barrierf(G(L), obj2gco(p), gcV(tv)); }
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107 #define lj_gc_objbarrier(L, p, o) \
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108 { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
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109 lj_gc_barrierf(G(L), obj2gco(p), obj2gco(o)); }
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110
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111 /* Allocator. */
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112 LJ_FUNC void *lj_mem_realloc(lua_State *L, void *p, GCSize osz, GCSize nsz);
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113 LJ_FUNC void * LJ_FASTCALL lj_mem_newgco(lua_State *L, GCSize size);
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114 LJ_FUNC void *lj_mem_grow(lua_State *L, void *p,
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115 MSize *szp, MSize lim, MSize esz);
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116
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117 #define lj_mem_new(L, s) lj_mem_realloc(L, NULL, 0, (s))
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118
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119 static LJ_AINLINE void lj_mem_free(global_State *g, void *p, size_t osize)
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120 {
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121 g->gc.total -= (GCSize)osize;
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122 g->allocf(g->allocd, p, osize, 0);
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123 }
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124
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125 #define lj_mem_newvec(L, n, t) ((t *)lj_mem_new(L, (GCSize)((n)*sizeof(t))))
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126 #define lj_mem_reallocvec(L, p, on, n, t) \
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127 ((p) = (t *)lj_mem_realloc(L, p, (on)*sizeof(t), (GCSize)((n)*sizeof(t))))
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128 #define lj_mem_growvec(L, p, n, m, t) \
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129 ((p) = (t *)lj_mem_grow(L, (p), &(n), (m), (MSize)sizeof(t)))
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130 #define lj_mem_freevec(g, p, n, t) lj_mem_free(g, (p), (n)*sizeof(t))
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131
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132 #define lj_mem_newobj(L, t) ((t *)lj_mem_newgco(L, sizeof(t)))
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133 #define lj_mem_newt(L, s, t) ((t *)lj_mem_new(L, (s)))
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134 #define lj_mem_freet(g, p) lj_mem_free(g, (p), sizeof(*(p)))
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135
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136 #endif