1/*
2** VM event handling.
3** Copyright (C) 2005-2021 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#ifndef _LJ_VMEVENT_H
7#define _LJ_VMEVENT_H
8
9#include "lj_obj.h"
10
11/* Registry key for VM event handler table. */
12#define LJ_VMEVENTS_REGKEY "_VMEVENTS"
13#define LJ_VMEVENTS_HSIZE 4
14
15#define VMEVENT_MASK(ev) ((uint8_t)1 << ((int)(ev) & 7))
16#define VMEVENT_HASH(ev) ((int)(ev) & ~7)
17#define VMEVENT_HASHIDX(h) ((int)(h) << 3)
18#define VMEVENT_NOCACHE 255
19
20#define VMEVENT_DEF(name, hash) \
21 LJ_VMEVENT_##name##_, \
22 LJ_VMEVENT_##name = ((LJ_VMEVENT_##name##_) & 7)|((hash) << 3)
23
24/* VM event IDs. */
25typedef enum {
26 VMEVENT_DEF(BC, 0x00003883),
27 VMEVENT_DEF(TRACE, 0xb2d91467),
28 VMEVENT_DEF(RECORD, 0x9284bf4f),
29 VMEVENT_DEF(TEXIT, 0xb29df2b0),
30 LJ_VMEVENT__MAX
31} VMEvent;
32
33#ifdef LUAJIT_DISABLE_VMEVENT
34#define lj_vmevent_send(L, ev, args) UNUSED(L)
35#define lj_vmevent_send_(L, ev, args, post) UNUSED(L)
36#else
37#define lj_vmevent_send(L, ev, args) \
38 if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
39 ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
40 if (argbase) { \
41 args \
42 lj_vmevent_call(L, argbase); \
43 } \
44 }
45#define lj_vmevent_send_(L, ev, args, post) \
46 if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
47 ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
48 if (argbase) { \
49 args \
50 lj_vmevent_call(L, argbase); \
51 post \
52 } \
53 }
54
55LJ_FUNC ptrdiff_t lj_vmevent_prepare(lua_State *L, VMEvent ev);
56LJ_FUNC void lj_vmevent_call(lua_State *L, ptrdiff_t argbase);
57#endif
58
59#endif
60