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lua/ltests.c

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/*
** $Id: ltests.c,v 1.88 2001/07/12 18:11:58 roberto Exp $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LUA_PRIVATE
#include "lua.h"
#include "lapi.h"
#include "lauxlib.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lmem.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "luadebug.h"
#include "lualib.h"
/*
** The whole module only makes sense with LUA_DEBUG on
*/
#ifdef LUA_DEBUG
lua_State *lua_state = NULL;
int islocked = 0;
static void setnameval (lua_State *L, const l_char *name, int val) {
lua_pushstring(L, name);
lua_pushnumber(L, val);
lua_settable(L, -3);
}
/*
** {======================================================================
** Controlled version for realloc.
** =======================================================================
*/
/* ensures maximum alignment for HEADER */
#define HEADER (sizeof(union L_Umaxalign))
#define MARKSIZE 32
#define MARK 0x55 /* 01010101 (a nice pattern) */
#define blocksize(b) (cast(size_t *, b) - HEADER/sizeof(size_t))
unsigned long memdebug_numblocks = 0;
unsigned long memdebug_total = 0;
unsigned long memdebug_maxmem = 0;
unsigned long memdebug_memlimit = ULONG_MAX;
static void *checkblock (void *block) {
size_t *b = blocksize(block);
size_t size = *b;
int i;
for (i=0;i<MARKSIZE;i++)
lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */
return b;
}
static void freeblock (void *block) {
if (block) {
size_t size = *blocksize(block);
block = checkblock(block);
memset(block, -1, size+HEADER+MARKSIZE); /* erase block */
free(block); /* free original block */
memdebug_numblocks--;
memdebug_total -= size;
}
}
void *debug_realloc (void *block, size_t oldsize, size_t size) {
lua_assert((oldsize == 0) ? block == NULL : oldsize == *blocksize(block));
if (size == 0) {
freeblock(block);
return NULL;
}
else if (memdebug_total+size-oldsize > memdebug_memlimit)
return NULL; /* to test memory allocation errors */
else {
void *newblock;
int i;
size_t realsize = HEADER+size+MARKSIZE;
if (realsize < size) return NULL; /* overflow! */
newblock = malloc(realsize); /* alloc a new block */
if (newblock == NULL) return NULL;
if (oldsize > size) oldsize = size;
if (block) {
memcpy(cast(char *, newblock)+HEADER, block, oldsize);
freeblock(block); /* erase (and check) old copy */
}
/* initialize new part of the block with something `weird' */
memset(cast(char *, newblock)+HEADER+oldsize, -MARK, size-oldsize);
memdebug_total += size;
if (memdebug_total > memdebug_maxmem)
memdebug_maxmem = memdebug_total;
memdebug_numblocks++;
*cast(size_t *, newblock) = size;
for (i=0;i<MARKSIZE;i++)
*(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);
return cast(char *, newblock)+HEADER;
}
}
/* }====================================================================== */
/*
** {======================================================
** Disassembler
** =======================================================
*/
static l_char *buildop (Proto *p, int pc, l_char *buff) {
Instruction i = p->code[pc];
OpCode o = GET_OPCODE(i);
const l_char *name = luaP_opnames[o];
sprintf(buff, l_s("%4d - "), pc);
switch (getOpMode(o)) {
case iABC:
sprintf(buff+strlen(buff), l_s("%-12s%4d %4d %4d"), name,
GETARG_A(i), GETARG_B(i), GETARG_C(i));
break;
case iABc:
sprintf(buff+strlen(buff), l_s("%-12s%4d %4d"), name, GETARG_A(i), GETARG_Bc(i));
break;
case iAsBc:
sprintf(buff+strlen(buff), l_s("%-12s%4d %4d"), name, GETARG_A(i), GETARG_sBc(i));
break;
}
return buff;
}
static int listcode (lua_State *L) {
int pc;
Proto *p;
luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, l_s("Lua function expected"));
p = clvalue(luaA_index(L, 1))->u.l.p;
lua_newtable(L);
setnameval(L, l_s("maxstack"), p->maxstacksize);
setnameval(L, l_s("numparams"), p->numparams);
for (pc=0; pc<p->sizecode; pc++) {
l_char buff[100];
lua_pushnumber(L, pc+1);
lua_pushstring(L, buildop(p, pc, buff));
lua_settable(L, -3);
}
return 1;
}
static int listk (lua_State *L) {
Proto *p;
int i;
luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, l_s("Lua function expected"));
p = clvalue(luaA_index(L, 1))->u.l.p;
lua_newtable(L);
for (i=0; i<p->sizek; i++) {
lua_pushnumber(L, i+1);
luaA_pushobject(L, p->k+i);
lua_settable(L, -3);
}
return 1;
}
static int listlocals (lua_State *L) {
Proto *p;
int pc = luaL_check_int(L, 2) - 1;
int i = 0;
const l_char *name;
luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, l_s("Lua function expected"));
p = clvalue(luaA_index(L, 1))->u.l.p;
while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
lua_pushstring(L, name);
return i-1;
}
/* }====================================================== */
static int pushbool (lua_State *L, int b) {
if (b) lua_pushnumber(L, 1);
else lua_pushnil(L);
return 1;
}
static int get_limits (lua_State *L) {
lua_newtable(L);
setnameval(L, l_s("BITS_INT"), BITS_INT);
setnameval(L, l_s("LFPF"), LFIELDS_PER_FLUSH);
setnameval(L, l_s("MAXLOCALS"), MAXLOCALS);
setnameval(L, l_s("MAXPARAMS"), MAXPARAMS);
setnameval(L, l_s("MAXSTACK"), MAXSTACK);
setnameval(L, l_s("MAXUPVALUES"), MAXUPVALUES);
return 1;
}
static int mem_query (lua_State *L) {
if (lua_isnull(L, 1)) {
lua_pushnumber(L, memdebug_total);
lua_pushnumber(L, memdebug_numblocks);
lua_pushnumber(L, memdebug_maxmem);
return 3;
}
else {
memdebug_memlimit = luaL_check_int(L, 1);
return 0;
}
}
static int hash_query (lua_State *L) {
if (lua_isnull(L, 2)) {
luaL_arg_check(L, lua_tag(L, 1) == LUA_TSTRING, 1, l_s("string expected"));
lua_pushnumber(L, tsvalue(luaA_index(L, 1))->tsv.hash);
}
else {
TObject *o = luaA_index(L, 1);
Hash *t;
luaL_checktype(L, 2, LUA_TTABLE);
t = hvalue(luaA_index(L, 2));
lua_pushnumber(L, luaH_mainposition(t, o) - t->node);
}
return 1;
}
static int table_query (lua_State *L) {
const Hash *t;
int i = luaL_opt_int(L, 2, -1);
luaL_checktype(L, 1, LUA_TTABLE);
t = hvalue(luaA_index(L, 1));
if (i == -1) {
lua_pushnumber(L, t->size);
lua_pushnumber(L, t->firstfree - t->node);
return 2;
}
else if (i < t->size) {
if (ttype(val(node(t, i))) != LUA_TNIL ||
ttype(key(node(t, i))) == LUA_TNIL ||
ttype(key(node(t, i))) == LUA_TNUMBER) {
luaA_pushobject(L, key(node(t, i)));
}
else
lua_pushstring(L, "<undef>");
luaA_pushobject(L, &t->node[i].val);
if (t->node[i].next) {
lua_pushnumber(L, t->node[i].next - t->node);
return 3;
}
else
return 2;
}
return 0;
}
static int string_query (lua_State *L) {
stringtable *tb = &G(L)->strt;
int s = luaL_opt_int(L, 2, 0) - 1;
if (s==-1) {
lua_pushnumber(L ,tb->nuse);
lua_pushnumber(L ,tb->size);
return 2;
}
else if (s < tb->size) {
TString *ts;
int n = 0;
for (ts = tb->hash[s]; ts; ts = ts->tsv.nexthash) {
setsvalue(L->top, ts);
incr_top;
n++;
}
return n;
}
return 0;
}
static int tref (lua_State *L) {
int level = lua_gettop(L);
luaL_checkany(L, 1);
lua_pushvalue(L, 1);
lua_pushnumber(L, lua_ref(L, luaL_opt_int(L, 2, 1)));
assert(lua_gettop(L) == level+1); /* +1 for result */
return 1;
}
static int getref (lua_State *L) {
int level = lua_gettop(L);
if (lua_getref(L, luaL_check_int(L, 1))) {
assert(lua_gettop(L) == level+1);
return 1;
}
else {
assert(lua_gettop(L) == level);
return 0;
}
}
static int unref (lua_State *L) {
int level = lua_gettop(L);
lua_unref(L, luaL_check_int(L, 1));
assert(lua_gettop(L) == level);
return 0;
}
static int newuserdata (lua_State *L) {
size_t size = luaL_check_int(L, 1);
l_char *p = cast(l_char *, lua_newuserdata(L, size));
while (size--) *p++ = l_c('\0');
return 1;
}
static int newuserdatabox (lua_State *L) {
lua_newuserdatabox(L, cast(void *, luaL_check_int(L, 1)));
return 1;
}
static int settag (lua_State *L) {
luaL_checkany(L, 1);
lua_pushvalue(L, 1); /* push value */
lua_settag(L, luaL_check_int(L, 2));
return 1; /* return value */
}
static int udataval (lua_State *L) {
luaL_checktype(L, 1, LUA_TUSERDATA);
lua_pushnumber(L, cast(int, lua_touserdata(L, 1)));
return 1;
}
static int newtag (lua_State *L) {
lua_pushnumber(L, lua_newtype(L, lua_tostring(L, 1),
cast(int, lua_tonumber(L, 2))));
return 1;
}
static int doonnewstack (lua_State *L) {
lua_State *L1 = lua_newthread(L, luaL_check_int(L, 1));
if (L1 == NULL) return 0;
*cast(int **, L1) = &islocked; /* initialize the lock */
lua_dostring(L1, luaL_check_string(L, 2));
lua_pushnumber(L, 1);
lua_close(L1);
return 1;
}
static int s2d (lua_State *L) {
lua_pushnumber(L, *cast(double *, luaL_check_string(L, 1)));
return 1;
}
static int d2s (lua_State *L) {
double d = luaL_check_number(L, 1);
lua_pushlstring(L, cast(l_char *, &d), sizeof(d));
return 1;
}
static int newstate (lua_State *L) {
lua_State *L1 = lua_open(luaL_check_int(L, 1));
if (L1) {
*cast(int **, L1) = &islocked; /* initialize the lock */
lua_pushnumber(L, (unsigned long)L1);
}
else
lua_pushnil(L);
return 1;
}
static int loadlib (lua_State *L) {
lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_check_number(L, 1)));
lua_register(L1, "mathlibopen", lua_mathlibopen);
lua_register(L1, "strlibopen", lua_strlibopen);
lua_register(L1, "iolibopen", lua_iolibopen);
lua_register(L1, "dblibopen", lua_dblibopen);
lua_register(L1, "baselibopen", lua_baselibopen);
return 0;
}
static int closestate (lua_State *L) {
lua_State *L1 = cast(lua_State *, cast(unsigned long, luaL_check_number(L, 1)));
lua_close(L1);
lua_unlock(L); /* close cannot unlock that */
return 0;
}
static int doremote (lua_State *L) {
lua_State *L1;
const l_char *code = luaL_check_string(L, 2);
int status;
L1 = cast(lua_State *, cast(unsigned long, luaL_check_number(L, 1)));
status = lua_dostring(L1, code);
if (status != 0) {
lua_pushnil(L);
lua_pushnumber(L, status);
return 2;
}
else {
int i = 0;
while (!lua_isnull(L1, ++i))
lua_pushstring(L, lua_tostring(L1, i));
lua_pop(L1, i-1);
return i-1;
}
}
static int settagmethod (lua_State *L) {
int tag = luaL_check_int(L, 1);
const l_char *event = luaL_check_string(L, 2);
luaL_checkany(L, 3);
lua_gettagmethod(L, tag, event);
lua_pushvalue(L, 3);
lua_settagmethod(L, tag, event);
return 1;
}
static int equal (lua_State *L) {
return pushbool(L, lua_equal(L, 1, 2));
}
/*
** {======================================================
** function to test the API with C. It interprets a kind of assembler
** language with calls to the API, so the test can be driven by Lua code
** =======================================================
*/
static const l_char *const delimits = l_s(" \t\n,;");
static void skip (const l_char **pc) {
while (**pc != l_c('\0') && strchr(delimits, **pc)) (*pc)++;
}
static int getnum_aux (lua_State *L, const l_char **pc) {
int res = 0;
int sig = 1;
skip(pc);
if (**pc == l_c('.')) {
res = cast(int, lua_tonumber(L, -1));
lua_pop(L, 1);
(*pc)++;
return res;
}
else if (**pc == l_c('-')) {
sig = -1;
(*pc)++;
}
while (isdigit(cast(int, **pc))) res = res*10 + (*(*pc)++) - l_c('0');
return sig*res;
}
static const l_char *getname_aux (l_char *buff, const l_char **pc) {
int i = 0;
skip(pc);
while (**pc != l_c('\0') && !strchr(delimits, **pc))
buff[i++] = *(*pc)++;
buff[i] = l_c('\0');
return buff;
}
#define EQ(s1) (strcmp(s1, inst) == 0)
#define getnum (getnum_aux(L, &pc))
#define getname (getname_aux(buff, &pc))
static int testC (lua_State *L) {
l_char buff[30];
const l_char *pc = luaL_check_string(L, 1);
for (;;) {
const l_char *inst = getname;
if EQ(l_s("")) return 0;
else if EQ(l_s("isnumber")) {
lua_pushnumber(L, lua_isnumber(L, getnum));
}
else if EQ(l_s("isstring")) {
lua_pushnumber(L, lua_isstring(L, getnum));
}
else if EQ(l_s("istable")) {
lua_pushnumber(L, lua_istable(L, getnum));
}
else if EQ(l_s("iscfunction")) {
lua_pushnumber(L, lua_iscfunction(L, getnum));
}
else if EQ(l_s("isfunction")) {
lua_pushnumber(L, lua_isfunction(L, getnum));
}
else if EQ(l_s("isuserdata")) {
lua_pushnumber(L, lua_isuserdata(L, getnum));
}
else if EQ(l_s("isnil")) {
lua_pushnumber(L, lua_isnil(L, getnum));
}
else if EQ(l_s("isnull")) {
lua_pushnumber(L, lua_isnull(L, getnum));
}
else if EQ(l_s("tonumber")) {
lua_pushnumber(L, lua_tonumber(L, getnum));
}
else if EQ(l_s("tostring")) {
const l_char *s = lua_tostring(L, getnum);
lua_pushstring(L, s);
}
else if EQ(l_s("tonumber")) {
lua_pushnumber(L, lua_tonumber(L, getnum));
}
else if EQ(l_s("strlen")) {
lua_pushnumber(L, lua_strlen(L, getnum));
}
else if EQ(l_s("tocfunction")) {
lua_pushcfunction(L, lua_tocfunction(L, getnum));
}
else if EQ(l_s("return")) {
return getnum;
}
else if EQ(l_s("gettop")) {
lua_pushnumber(L, lua_gettop(L));
}
else if EQ(l_s("settop")) {
lua_settop(L, getnum);
}
else if EQ(l_s("pop")) {
lua_pop(L, getnum);
}
else if EQ(l_s("pushnum")) {
lua_pushnumber(L, getnum);
}
else if EQ(l_s("pushvalue")) {
lua_pushvalue(L, getnum);
}
else if EQ(l_s("remove")) {
lua_remove(L, getnum);
}
else if EQ(l_s("insert")) {
lua_insert(L, getnum);
}
else if EQ(l_s("gettable")) {
lua_gettable(L, getnum);
}
else if EQ(l_s("settable")) {
lua_settable(L, getnum);
}
else if EQ(l_s("next")) {
lua_next(L, -2);
}
else if EQ(l_s("concat")) {
lua_concat(L, getnum);
}
else if EQ(l_s("lessthan")) {
int a = getnum;
if (lua_lessthan(L, a, getnum))
lua_pushnumber(L, 1);
else
lua_pushnil(L);
}
else if EQ(l_s("rawcall")) {
int narg = getnum;
int nres = getnum;
lua_rawcall(L, narg, nres);
}
else if EQ(l_s("call")) {
int narg = getnum;
int nres = getnum;
lua_call(L, narg, nres);
}
else if EQ(l_s("dostring")) {
lua_dostring(L, luaL_check_string(L, getnum));
}
else if EQ(l_s("settagmethod")) {
int tag = getnum;
const l_char *event = getname;
lua_settagmethod(L, tag, event);
}
else if EQ(l_s("gettagmethod")) {
int tag = getnum;
const l_char *event = getname;
lua_gettagmethod(L, tag, event);
}
else if EQ(l_s("type")) {
lua_pushstring(L, lua_type(L, getnum));
}
else luaL_verror(L, l_s("unknown instruction %.30s"), buff);
}
return 0;
}
/* }====================================================== */
static const struct luaL_reg tests_funcs[] = {
{l_s("hash"), hash_query},
{l_s("limits"), get_limits},
{l_s("listcode"), listcode},
{l_s("listk"), listk},
{l_s("listlocals"), listlocals},
{l_s("loadlib"), loadlib},
{l_s("querystr"), string_query},
{l_s("querytab"), table_query},
{l_s("testC"), testC},
{l_s("ref"), tref},
{l_s("getref"), getref},
{l_s("unref"), unref},
{l_s("d2s"), d2s},
{l_s("s2d"), s2d},
{l_s("newuserdata"), newuserdata},
{l_s("newuserdatabox"), newuserdatabox},
{l_s("settag"), settag},
{l_s("udataval"), udataval},
{l_s("newtag"), newtag},
{l_s("doonnewstack"), doonnewstack},
{l_s("newstate"), newstate},
{l_s("closestate"), closestate},
{l_s("doremote"), doremote},
{l_s("settagmethod"), settagmethod},
{l_s("equal"), equal},
{l_s("totalmem"), mem_query}
};
void luaB_opentests (lua_State *L) {
*cast(int **, L) = &islocked; /* init lock */
lua_state = L; /* keep first state to be opened */
/* open lib in a new table */
lua_newtable(L);
lua_getglobals(L);
lua_pushvalue(L, -2);
lua_setglobals(L);
luaL_openl(L, tests_funcs); /* open functions inside new table */
lua_setglobals(L); /* restore old table of globals */
lua_setglobal(L, l_s("T")); /* set new table as global T */
}
#endif
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