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-rw-r--r--deps/LuaJIT/src/lj_state.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/deps/LuaJIT/src/lj_state.c b/deps/LuaJIT/src/lj_state.c
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--- a/deps/LuaJIT/src/lj_state.c
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@@ -1,300 +0,0 @@
-/*
-** State and stack handling.
-** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
-**
-** Portions taken verbatim or adapted from the Lua interpreter.
-** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
-*/
-
-#define lj_state_c
-#define LUA_CORE
-
-#include "lj_obj.h"
-#include "lj_gc.h"
-#include "lj_err.h"
-#include "lj_buf.h"
-#include "lj_str.h"
-#include "lj_tab.h"
-#include "lj_func.h"
-#include "lj_meta.h"
-#include "lj_state.h"
-#include "lj_frame.h"
-#if LJ_HASFFI
-#include "lj_ctype.h"
-#endif
-#include "lj_trace.h"
-#include "lj_dispatch.h"
-#include "lj_vm.h"
-#include "lj_lex.h"
-#include "lj_alloc.h"
-#include "luajit.h"
-
-/* -- Stack handling ------------------------------------------------------ */
-
-/* Stack sizes. */
-#define LJ_STACK_MIN LUA_MINSTACK /* Min. stack size. */
-#define LJ_STACK_MAX LUAI_MAXSTACK /* Max. stack size. */
-#define LJ_STACK_START (2*LJ_STACK_MIN) /* Starting stack size. */
-#define LJ_STACK_MAXEX (LJ_STACK_MAX + 1 + LJ_STACK_EXTRA)
-
-/* Explanation of LJ_STACK_EXTRA:
-**
-** Calls to metamethods store their arguments beyond the current top
-** without checking for the stack limit. This avoids stack resizes which
-** would invalidate passed TValue pointers. The stack check is performed
-** later by the function header. This can safely resize the stack or raise
-** an error. Thus we need some extra slots beyond the current stack limit.
-**
-** Most metamethods need 4 slots above top (cont, mobj, arg1, arg2) plus
-** one extra slot if mobj is not a function. Only lj_meta_tset needs 5
-** slots above top, but then mobj is always a function. So we can get by
-** with 5 extra slots.
-** LJ_FR2: We need 2 more slots for the frame PC and the continuation PC.
-*/
-
-/* Resize stack slots and adjust pointers in state. */
-static void resizestack(lua_State *L, MSize n)
-{
- TValue *st, *oldst = tvref(L->stack);
- ptrdiff_t delta;
- MSize oldsize = L->stacksize;
- MSize realsize = n + 1 + LJ_STACK_EXTRA;
- GCobj *up;
- lua_assert((MSize)(tvref(L->maxstack)-oldst)==L->stacksize-LJ_STACK_EXTRA-1);
- st = (TValue *)lj_mem_realloc(L, tvref(L->stack),
- (MSize)(oldsize*sizeof(TValue)),
- (MSize)(realsize*sizeof(TValue)));
- setmref(L->stack, st);
- delta = (char *)st - (char *)oldst;
- setmref(L->maxstack, st + n);
- while (oldsize < realsize) /* Clear new slots. */
- setnilV(st + oldsize++);
- L->stacksize = realsize;
- if ((size_t)(mref(G(L)->jit_base, char) - (char *)oldst) < oldsize)
- setmref(G(L)->jit_base, mref(G(L)->jit_base, char) + delta);
- L->base = (TValue *)((char *)L->base + delta);
- L->top = (TValue *)((char *)L->top + delta);
- for (up = gcref(L->openupval); up != NULL; up = gcnext(up))
- setmref(gco2uv(up)->v, (TValue *)((char *)uvval(gco2uv(up)) + delta));
-}
-
-/* Relimit stack after error, in case the limit was overdrawn. */
-void lj_state_relimitstack(lua_State *L)
-{
- if (L->stacksize > LJ_STACK_MAXEX && L->top-tvref(L->stack) < LJ_STACK_MAX-1)
- resizestack(L, LJ_STACK_MAX);
-}
-
-/* Try to shrink the stack (called from GC). */
-void lj_state_shrinkstack(lua_State *L, MSize used)
-{
- if (L->stacksize > LJ_STACK_MAXEX)
- return; /* Avoid stack shrinking while handling stack overflow. */
- if (4*used < L->stacksize &&
- 2*(LJ_STACK_START+LJ_STACK_EXTRA) < L->stacksize &&
- /* Don't shrink stack of live trace. */
- (tvref(G(L)->jit_base) == NULL || obj2gco(L) != gcref(G(L)->cur_L)))
- resizestack(L, L->stacksize >> 1);
-}
-
-/* Try to grow stack. */
-void LJ_FASTCALL lj_state_growstack(lua_State *L, MSize need)
-{
- MSize n;
- if (L->stacksize > LJ_STACK_MAXEX) /* Overflow while handling overflow? */
- lj_err_throw(L, LUA_ERRERR);
- n = L->stacksize + need;
- if (n > LJ_STACK_MAX) {
- n += 2*LUA_MINSTACK;
- } else if (n < 2*L->stacksize) {
- n = 2*L->stacksize;
- if (n >= LJ_STACK_MAX)
- n = LJ_STACK_MAX;
- }
- resizestack(L, n);
- if (L->stacksize > LJ_STACK_MAXEX)
- lj_err_msg(L, LJ_ERR_STKOV);
-}
-
-void LJ_FASTCALL lj_state_growstack1(lua_State *L)
-{
- lj_state_growstack(L, 1);
-}
-
-/* Allocate basic stack for new state. */
-static void stack_init(lua_State *L1, lua_State *L)
-{
- TValue *stend, *st = lj_mem_newvec(L, LJ_STACK_START+LJ_STACK_EXTRA, TValue);
- setmref(L1->stack, st);
- L1->stacksize = LJ_STACK_START + LJ_STACK_EXTRA;
- stend = st + L1->stacksize;
- setmref(L1->maxstack, stend - LJ_STACK_EXTRA - 1);
- setthreadV(L1, st++, L1); /* Needed for curr_funcisL() on empty stack. */
- if (LJ_FR2) setnilV(st++);
- L1->base = L1->top = st;
- while (st < stend) /* Clear new slots. */
- setnilV(st++);
-}
-
-/* -- State handling ------------------------------------------------------ */
-
-/* Open parts that may cause memory-allocation errors. */
-static TValue *cpluaopen(lua_State *L, lua_CFunction dummy, void *ud)
-{
- global_State *g = G(L);
- UNUSED(dummy);
- UNUSED(ud);
- stack_init(L, L);
- /* NOBARRIER: State initialization, all objects are white. */
- setgcref(L->env, obj2gco(lj_tab_new(L, 0, LJ_MIN_GLOBAL)));
- settabV(L, registry(L), lj_tab_new(L, 0, LJ_MIN_REGISTRY));
- lj_str_resize(L, LJ_MIN_STRTAB-1);
- lj_meta_init(L);
- lj_lex_init(L);
- fixstring(lj_err_str(L, LJ_ERR_ERRMEM)); /* Preallocate memory error msg. */
- g->gc.threshold = 4*g->gc.total;
- lj_trace_initstate(g);
- return NULL;
-}
-
-static void close_state(lua_State *L)
-{
- global_State *g = G(L);
- lj_func_closeuv(L, tvref(L->stack));
- lj_gc_freeall(g);
- lua_assert(gcref(g->gc.root) == obj2gco(L));
- lua_assert(g->strnum == 0);
- lj_trace_freestate(g);
-#if LJ_HASFFI
- lj_ctype_freestate(g);
-#endif
- lj_mem_freevec(g, g->strhash, g->strmask+1, GCRef);
- lj_buf_free(g, &g->tmpbuf);
- lj_mem_freevec(g, tvref(L->stack), L->stacksize, TValue);
- lua_assert(g->gc.total == sizeof(GG_State));
-#ifndef LUAJIT_USE_SYSMALLOC
- if (g->allocf == lj_alloc_f)
- lj_alloc_destroy(g->allocd);
- else
-#endif
- g->allocf(g->allocd, G2GG(g), sizeof(GG_State), 0);
-}
-
-#if LJ_64 && !LJ_GC64 && !(defined(LUAJIT_USE_VALGRIND) && defined(LUAJIT_USE_SYSMALLOC))
-lua_State *lj_state_newstate(lua_Alloc f, void *ud)
-#else
-LUA_API lua_State *lua_newstate(lua_Alloc f, void *ud)
-#endif
-{
- GG_State *GG = (GG_State *)f(ud, NULL, 0, sizeof(GG_State));
- lua_State *L = &GG->L;
- global_State *g = &GG->g;
- if (GG == NULL || !checkptrGC(GG)) return NULL;
- memset(GG, 0, sizeof(GG_State));
- L->gct = ~LJ_TTHREAD;
- L->marked = LJ_GC_WHITE0 | LJ_GC_FIXED | LJ_GC_SFIXED; /* Prevent free. */
- L->dummy_ffid = FF_C;
- setmref(L->glref, g);
- g->gc.currentwhite = LJ_GC_WHITE0 | LJ_GC_FIXED;
- g->strempty.marked = LJ_GC_WHITE0;
- g->strempty.gct = ~LJ_TSTR;
- g->allocf = f;
- g->allocd = ud;
- setgcref(g->mainthref, obj2gco(L));
- setgcref(g->uvhead.prev, obj2gco(&g->uvhead));
- setgcref(g->uvhead.next, obj2gco(&g->uvhead));
- g->strmask = ~(MSize)0;
- setnilV(registry(L));
- setnilV(&g->nilnode.val);
- setnilV(&g->nilnode.key);
-#if !LJ_GC64
- setmref(g->nilnode.freetop, &g->nilnode);
-#endif
- lj_buf_init(NULL, &g->tmpbuf);
- g->gc.state = GCSpause;
- setgcref(g->gc.root, obj2gco(L));
- setmref(g->gc.sweep, &g->gc.root);
- g->gc.total = sizeof(GG_State);
- g->gc.pause = LUAI_GCPAUSE;
- g->gc.stepmul = LUAI_GCMUL;
- lj_dispatch_init((GG_State *)L);
- L->status = LUA_ERRERR+1; /* Avoid touching the stack upon memory error. */
- if (lj_vm_cpcall(L, NULL, NULL, cpluaopen) != 0) {
- /* Memory allocation error: free partial state. */
- close_state(L);
- return NULL;
- }
- L->status = LUA_OK;
- return L;
-}
-
-static TValue *cpfinalize(lua_State *L, lua_CFunction dummy, void *ud)
-{
- UNUSED(dummy);
- UNUSED(ud);
- lj_gc_finalize_cdata(L);
- lj_gc_finalize_udata(L);
- /* Frame pop omitted. */
- return NULL;
-}
-
-LUA_API void lua_close(lua_State *L)
-{
- global_State *g = G(L);
- int i;
- L = mainthread(g); /* Only the main thread can be closed. */
-#if LJ_HASPROFILE
- luaJIT_profile_stop(L);
-#endif
- setgcrefnull(g->cur_L);
- lj_func_closeuv(L, tvref(L->stack));
- lj_gc_separateudata(g, 1); /* Separate udata which have GC metamethods. */
-#if LJ_HASJIT
- G2J(g)->flags &= ~JIT_F_ON;
- G2J(g)->state = LJ_TRACE_IDLE;
- lj_dispatch_update(g);
-#endif
- for (i = 0;;) {
- hook_enter(g);
- L->status = LUA_OK;
- L->base = L->top = tvref(L->stack) + 1 + LJ_FR2;
- L->cframe = NULL;
- if (lj_vm_cpcall(L, NULL, NULL, cpfinalize) == LUA_OK) {
- if (++i >= 10) break;
- lj_gc_separateudata(g, 1); /* Separate udata again. */
- if (gcref(g->gc.mmudata) == NULL) /* Until nothing is left to do. */
- break;
- }
- }
- close_state(L);
-}
-
-lua_State *lj_state_new(lua_State *L)
-{
- lua_State *L1 = lj_mem_newobj(L, lua_State);
- L1->gct = ~LJ_TTHREAD;
- L1->dummy_ffid = FF_C;
- L1->status = LUA_OK;
- L1->stacksize = 0;
- setmref(L1->stack, NULL);
- L1->cframe = NULL;
- /* NOBARRIER: The lua_State is new (marked white). */
- setgcrefnull(L1->openupval);
- setmrefr(L1->glref, L->glref);
- setgcrefr(L1->env, L->env);
- stack_init(L1, L); /* init stack */
- lua_assert(iswhite(obj2gco(L1)));
- return L1;
-}
-
-void LJ_FASTCALL lj_state_free(global_State *g, lua_State *L)
-{
- lua_assert(L != mainthread(g));
- if (obj2gco(L) == gcref(g->cur_L))
- setgcrefnull(g->cur_L);
- lj_func_closeuv(L, tvref(L->stack));
- lua_assert(gcref(L->openupval) == NULL);
- lj_mem_freevec(g, tvref(L->stack), L->stacksize, TValue);
- lj_mem_freet(g, L);
-}
-