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Merge pull request snabbco#36 from lukego/rm-introspect
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lib_jit.c: Remove introspection and jit.attach()
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@lukego
lukego authored Mar 16, 2017
2 parents 521a874 + 972fc1e commit d0cb401
Showing 1 changed file with 0 additions and 292 deletions.
292 changes: 0 additions & 292 deletions src/lib_jit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,302 +99,13 @@ LJLIB_CF(jit_status)
return (int)(L->top - L->base);
}

LJLIB_CF(jit_attach)
{
luaL_error(L, "vmevent API removed");
return 0;
}

LJLIB_PUSH(top-5) LJLIB_SET(os)
LJLIB_PUSH(top-4) LJLIB_SET(arch)
LJLIB_PUSH(top-3) LJLIB_SET(version_num)
LJLIB_PUSH(top-2) LJLIB_SET(version)

#include "lj_libdef.h"

/* -- jit.util.* functions ------------------------------------------------ */

#define LJLIB_MODULE_jit_util

/* -- Reflection API for Lua functions ------------------------------------ */

/* Return prototype of first argument (Lua function or prototype object) */
static GCproto *check_Lproto(lua_State *L, int nolua)
{
TValue *o = L->base;
if (L->top > o) {
if (tvisproto(o)) {
return protoV(o);
} else if (tvisfunc(o)) {
if (isluafunc(funcV(o)))
return funcproto(funcV(o));
else if (nolua)
return NULL;
}
}
lj_err_argt(L, 1, LUA_TFUNCTION);
return NULL; /* unreachable */
}

static void setintfield(lua_State *L, GCtab *t, const char *name, int32_t val)
{
setintV(lj_tab_setstr(L, t, lj_str_newz(L, name)), val);
}

/* local info = jit.util.funcinfo(func [,pc]) */
LJLIB_CF(jit_util_funcinfo)
{
GCproto *pt = check_Lproto(L, 1);
if (pt) {
BCPos pc = (BCPos)lj_lib_optint(L, 2, 0);
GCtab *t;
lua_createtable(L, 0, 16); /* Increment hash size if fields are added. */
t = tabV(L->top-1);
setintfield(L, t, "linedefined", pt->firstline);
setintfield(L, t, "lastlinedefined", pt->firstline + pt->numline);
setintfield(L, t, "stackslots", pt->framesize);
setintfield(L, t, "params", pt->numparams);
setintfield(L, t, "bytecodes", (int32_t)pt->sizebc);
setintfield(L, t, "gcconsts", (int32_t)pt->sizekgc);
setintfield(L, t, "nconsts", (int32_t)pt->sizekn);
setintfield(L, t, "upvalues", (int32_t)pt->sizeuv);
if (pc < pt->sizebc)
setintfield(L, t, "currentline", lj_debug_line(pt, pc));
lua_pushboolean(L, (pt->flags & PROTO_VARARG));
lua_setfield(L, -2, "isvararg");
lua_pushboolean(L, (pt->flags & PROTO_CHILD));
lua_setfield(L, -2, "children");
setstrV(L, L->top++, proto_chunkname(pt));
lua_setfield(L, -2, "source");
lj_debug_pushloc(L, pt, pc);
lua_setfield(L, -2, "loc");
setprotoV(L, lj_tab_setstr(L, t, lj_str_newlit(L, "proto")), pt);
} else {
GCfunc *fn = funcV(L->base);
GCtab *t;
lua_createtable(L, 0, 4); /* Increment hash size if fields are added. */
t = tabV(L->top-1);
if (!iscfunc(fn))
setintfield(L, t, "ffid", fn->c.ffid);
setintptrV(lj_tab_setstr(L, t, lj_str_newlit(L, "addr")),
(intptr_t)(void *)fn->c.f);
setintfield(L, t, "upvalues", fn->c.nupvalues);
}
return 1;
}

/* local ins, m = jit.util.funcbc(func, pc) */
LJLIB_CF(jit_util_funcbc)
{
GCproto *pt = check_Lproto(L, 0);
BCPos pc = (BCPos)lj_lib_checkint(L, 2);
if (pc < pt->sizebc) {
BCIns ins = proto_bc(pt)[pc];
BCOp op = bc_op(ins);
lua_assert(op < BC__MAX);
setintV(L->top, ins);
setintV(L->top+1, lj_bc_mode[op]);
L->top += 2;
return 2;
}
return 0;
}

/* local k = jit.util.funck(func, idx) */
LJLIB_CF(jit_util_funck)
{
GCproto *pt = check_Lproto(L, 0);
ptrdiff_t idx = (ptrdiff_t)lj_lib_checkint(L, 2);
if (idx >= 0) {
if (idx < (ptrdiff_t)pt->sizekn) {
copyTV(L, L->top-1, proto_knumtv(pt, idx));
return 1;
}
} else {
if (~idx < (ptrdiff_t)pt->sizekgc) {
GCobj *gc = proto_kgc(pt, idx);
setgcV(L, L->top-1, gc, ~gc->gch.gct);
return 1;
}
}
return 0;
}

/* local name = jit.util.funcuvname(func, idx) */
LJLIB_CF(jit_util_funcuvname)
{
GCproto *pt = check_Lproto(L, 0);
uint32_t idx = (uint32_t)lj_lib_checkint(L, 2);
if (idx < pt->sizeuv) {
setstrV(L, L->top-1, lj_str_newz(L, lj_debug_uvname(pt, idx)));
return 1;
}
return 0;
}

/* -- Reflection API for traces ------------------------------------------- */


/* Check trace argument. Must not throw for non-existent trace numbers. */
static GCtrace *jit_checktrace(lua_State *L)
{
TraceNo tr = (TraceNo)lj_lib_checkint(L, 1);
jit_State *J = L2J(L);
if (tr > 0 && tr < J->sizetrace)
return traceref(J, tr);
return NULL;
}

/* Names of link types. ORDER LJ_TRLINK */
static const char *const jit_trlinkname[] = {
"none", "root", "loop", "tail-recursion", "up-recursion", "down-recursion",
"interpreter", "return", "stitch"
};

/* local info = jit.util.traceinfo(tr) */
LJLIB_CF(jit_util_traceinfo)
{
GCtrace *T = jit_checktrace(L);
if (T) {
GCtab *t;
lua_createtable(L, 0, 8); /* Increment hash size if fields are added. */
t = tabV(L->top-1);
setintfield(L, t, "nins", (int32_t)T->nins - REF_BIAS - 1);
setintfield(L, t, "nk", REF_BIAS - (int32_t)T->nk);
setintfield(L, t, "link", T->link);
setintfield(L, t, "nexit", T->nsnap);
setstrV(L, L->top++, lj_str_newz(L, jit_trlinkname[T->linktype]));
lua_setfield(L, -2, "linktype");
/* There are many more fields. Add them only when needed. */
return 1;
}
return 0;
}

/* local m, ot, op1, op2, prev = jit.util.traceir(tr, idx) */
LJLIB_CF(jit_util_traceir)
{
GCtrace *T = jit_checktrace(L);
IRRef ref = (IRRef)lj_lib_checkint(L, 2) + REF_BIAS;
if (T && ref >= REF_BIAS && ref < T->nins) {
IRIns *ir = &T->ir[ref];
int32_t m = lj_ir_mode[ir->o];
setintV(L->top-2, m);
setintV(L->top-1, ir->ot);
setintV(L->top++, (int32_t)ir->op1 - (irm_op1(m)==IRMref ? REF_BIAS : 0));
setintV(L->top++, (int32_t)ir->op2 - (irm_op2(m)==IRMref ? REF_BIAS : 0));
setintV(L->top++, ir->prev);
return 5;
}
return 0;
}

/* local k, t [, slot] = jit.util.tracek(tr, idx) */
LJLIB_CF(jit_util_tracek)
{
GCtrace *T = jit_checktrace(L);
IRRef ref = (IRRef)lj_lib_checkint(L, 2) + REF_BIAS;
if (T && ref >= T->nk && ref < REF_BIAS) {
IRIns *ir = &T->ir[ref];
int32_t slot = -1;
if (ir->o == IR_KSLOT) {
slot = ir->op2;
ir = &T->ir[ir->op1];
}
if (ir->o == IR_KINT64 && !ctype_ctsG(G(L))) {
ptrdiff_t oldtop = savestack(L, L->top);
luaopen_ffi(L); /* Load FFI library on-demand. */
L->top = restorestack(L, oldtop);
}
lj_ir_kvalue(L, L->top-2, ir);
setintV(L->top-1, (int32_t)irt_type(ir->t));
if (slot == -1)
return 2;
setintV(L->top++, slot);
return 3;
}
return 0;
}

/* local snap = jit.util.tracesnap(tr, sn) */
LJLIB_CF(jit_util_tracesnap)
{
GCtrace *T = jit_checktrace(L);
SnapNo sn = (SnapNo)lj_lib_checkint(L, 2);
if (T && sn < T->nsnap) {
SnapShot *snap = &T->snap[sn];
SnapEntry *map = &T->snapmap[snap->mapofs];
MSize n, nent = snap->nent;
GCtab *t;
lua_createtable(L, nent+2, 0);
t = tabV(L->top-1);
setintV(lj_tab_setint(L, t, 0), (int32_t)snap->ref - REF_BIAS);
setintV(lj_tab_setint(L, t, 1), (int32_t)snap->nslots);
for (n = 0; n < nent; n++)
setintV(lj_tab_setint(L, t, (int32_t)(n+2)), (int32_t)map[n]);
setintV(lj_tab_setint(L, t, (int32_t)(nent+2)), (int32_t)SNAP(255, 0, 0));
return 1;
}
return 0;
}

/* local mcode, addr, loop = jit.util.tracemc(tr) */
LJLIB_CF(jit_util_tracemc)
{
GCtrace *T = jit_checktrace(L);
if (T && T->mcode != NULL) {
setstrV(L, L->top-1, lj_str_new(L, (const char *)T->mcode, T->szmcode));
setintptrV(L->top++, (intptr_t)(void *)T->mcode);
setintV(L->top++, T->mcloop);
return 3;
}
return 0;
}

/* local addr = jit.util.traceexitstub([tr,] exitno) */
LJLIB_CF(jit_util_traceexitstub)
{
#ifdef EXITSTUBS_PER_GROUP
ExitNo exitno = (ExitNo)lj_lib_checkint(L, 1);
jit_State *J = L2J(L);
if (exitno < EXITSTUBS_PER_GROUP*LJ_MAX_EXITSTUBGR) {
setintptrV(L->top-1, (intptr_t)(void *)exitstub_addr(J, exitno));
return 1;
}
#else
if (L->top > L->base+1) { /* Don't throw for one-argument variant. */
GCtrace *T = jit_checktrace(L);
ExitNo exitno = (ExitNo)lj_lib_checkint(L, 2);
ExitNo maxexit = T->root ? T->nsnap+1 : T->nsnap;
if (T && T->mcode != NULL && exitno < maxexit) {
setintptrV(L->top-1, (intptr_t)(void *)exitstub_trace_addr(T, exitno));
return 1;
}
}
#endif
return 0;
}

/* local addr = jit.util.ircalladdr(idx) */
LJLIB_CF(jit_util_ircalladdr)
{
uint32_t idx = (uint32_t)lj_lib_checkint(L, 1);
if (idx < IRCALL__MAX) {
setintptrV(L->top-1, (intptr_t)(void *)lj_ir_callinfo[idx].func);
return 1;
}
return 0;
}


#include "lj_libdef.h"

static int luaopen_jit_util(lua_State *L)
{
LJ_LIB_REG(L, NULL, jit_util);
return 1;
}

/* -- jit.opt module ------------------------------------------------------ */


Expand Down Expand Up @@ -548,9 +259,6 @@ LUALIB_API int luaopen_jit(lua_State *L)
lua_pushinteger(L, LUAJIT_VERSION_NUM);
lua_pushliteral(L, LUAJIT_VERSION);
LJ_LIB_REG(L, LUA_JITLIBNAME, jit);
#ifndef LUAJIT_DISABLE_JITUTIL
lj_lib_prereg(L, LUA_JITLIBNAME ".util", luaopen_jit_util, tabref(L->env));
#endif
LJ_LIB_REG(L, "jit.opt", jit_opt);
L->top -= 2;
return 1;
Expand Down

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