Lua 5.1 (work5) lua interpreter crash problem
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- Subject: Lua 5.1 (work5) lua interpreter crash problem
- From: redpixel <redwiki.net@...>
- Date: Mon, 7 Mar 2005 14:57:37 +0900
I build lua interpreter using MinGW 3.2-rc3. it's compiled
successfully using gcc(C build), but when using g++(C++ build), I got
runtime error.(after runtime error, it crash) my modification is
simply "extern "C" { ... }" header-wrapping. but work4 is fine. please
check this.
--
Kwon Tai-in
http://www.redwiki.net
PGPkey: http://www.redwiki.net/pubkey
/*
** $Id: lua.c,v 1.135 2005年01月10日 17:21:10 roberto Exp $
** Lua stand-alone interpreter
** See Copyright Notice in lua.h
*/
extern "C" {
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define lua_c
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
}
/*
** generic extra include file
*/
#ifdef LUA_USERCONFIG
#include LUA_USERCONFIG
#endif
static lua_State *globalL = NULL;
static const char *progname = PROGNAME;
static void lstop (lua_State *L, lua_Debug *ar) {
(void)ar; /* unused arg. */
lua_sethook(L, NULL, 0, 0);
luaL_error(L, "interrupted!");
}
static void laction (int i) {
signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
terminate process (default action) */
lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
}
static void print_usage (void) {
fprintf(stderr,
"usage: %s [options] [script [args]].\n"
"Available options are:\n"
" - execute stdin as a file\n"
" -e stat execute string `stat'\n"
" -i enter interactive mode after executing `script'\n"
" -l name load and run library `name'\n"
" -v show version information\n"
" -- stop handling options\n" ,
progname);
}
static void l_message (const char *pname, const char *msg) {
if (pname) fprintf(stderr, "%s: ", pname);
fprintf(stderr, "%s\n", msg);
}
static int report (lua_State *L, int status) {
if (status && !lua_isnil(L, -1)) {
const char *msg = lua_tostring(L, -1);
if (msg == NULL) msg = "(error object is not a string)";
l_message(progname, msg);
lua_pop(L, 1);
}
return status;
}
static int traceback (lua_State *L) {
luaL_getfield(L, LUA_GLOBALSINDEX, "debug.traceback");
if (!lua_isfunction(L, -1))
lua_pop(L, 1);
else {
lua_pushvalue(L, 1); /* pass error message */
lua_pushinteger(L, 2); /* skip this function and traceback */
lua_call(L, 2, 1); /* call debug.traceback */
}
return 1;
}
static int docall (lua_State *L, int narg, int clear) {
int status;
int base = lua_gettop(L) - narg; /* function index */
lua_pushcfunction(L, traceback); /* push traceback function */
lua_insert(L, base); /* put it under chunk and args */
signal(SIGINT, laction);
status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
signal(SIGINT, SIG_DFL);
lua_remove(L, base); /* remove traceback function */
return status;
}
static void print_version (void) {
l_message(NULL, LUA_VERSION " " LUA_COPYRIGHT);
}
static int getargs (lua_State *L, char *argv[], int n) {
int i, narg;
for (i=n+1; argv[i]; i++) {
luaL_checkstack(L, 1, "too many arguments to script");
lua_pushstring(L, argv[i]);
}
narg = i-(n+1); /* number of arguments to the script (not to `lua.c') */
lua_newtable(L);
for (i=0; argv[i]; i++) {
lua_pushstring(L, argv[i]);
lua_rawseti(L, -2, i - n);
}
return narg;
}
static int dofile (lua_State *L, const char *name) {
int status = luaL_loadfile(L, name) || docall(L, 0, 1);
return report(L, status);
}
static int dostring (lua_State *L, const char *s, const char *name) {
int status = luaL_loadbuffer(L, s, strlen(s), name) || docall(L, 0, 1);
return report(L, status);
}
static int dolibrary (lua_State *L, const char *name) {
luaL_getfield(L, LUA_GLOBALSINDEX, "package.path");
if (!lua_isstring(L, -1)) {
l_message(progname, "`package.path' must be a string");
return 1;
}
name = luaL_searchpath(L, name, lua_tostring(L, -1));
if (name == NULL) return report(L, 1);
else return dofile(L, name);
}
/*
** this macro defines a function to show the prompt and reads the
** next line for manual input
*/
#ifndef lua_readline
#define lua_readline(L,prompt) readline(L,prompt)
/* maximum length of an input line */
#ifndef MAXINPUT
#define MAXINPUT 512
#endif
static int readline (lua_State *L, const char *prompt) {
static char buffer[MAXINPUT];
if (prompt) {
fputs(prompt, stdout);
fflush(stdout);
}
if (fgets(buffer, sizeof(buffer), stdin) == NULL)
return 0; /* read fails */
else {
lua_pushstring(L, buffer);
return 1;
}
}
#endif
static const char *get_prompt (lua_State *L, int firstline) {
const char *p = NULL;
lua_pushstring(L, firstline ? "_PROMPT" : "_PROMPT2");
lua_rawget(L, LUA_GLOBALSINDEX);
p = lua_tostring(L, -1);
if (p == NULL) p = (firstline ? PROMPT : PROMPT2);
lua_pop(L, 1); /* remove global */
return p;
}
static int incomplete (lua_State *L, int status) {
if (status == LUA_ERRSYNTAX &&
strstr(lua_tostring(L, -1), "near `<eof>'") != NULL) {
lua_pop(L, 1);
return 1;
}
else
return 0;
}
static int loadline (lua_State *L) {
int status;
lua_settop(L, 0);
if (lua_readline(L, get_prompt(L, 1)) == 0) /* no input? */
return -1;
if (lua_tostring(L, -1)[0] == '=') { /* line starts with `=' ? */
lua_pushfstring(L, "return %s", lua_tostring(L, -1)+1);/* `=' -> `return' */
lua_remove(L, -2); /* remove original line */
}
for (;;) { /* repeat until gets a complete line */
status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
if (!incomplete(L, status)) break; /* cannot try to add lines? */
if (lua_readline(L, get_prompt(L, 0)) == 0) /* no more input? */
return -1;
lua_concat(L, lua_gettop(L)); /* join lines */
}
lua_saveline(L, lua_tostring(L, 1));
lua_remove(L, 1); /* remove line */
return status;
}
static void dotty (lua_State *L) {
int status;
const char *oldprogname = progname;
progname = NULL;
print_version();
while ((status = loadline(L)) != -1) {
if (status == 0) status = docall(L, 0, 0);
report(L, status);
if (status == 0 && lua_gettop(L) > 0) { /* any result to print? */
lua_getglobal(L, "print");
lua_insert(L, 1);
if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
l_message(progname, lua_pushfstring(L, "error calling `print' (%s)",
lua_tostring(L, -1)));
}
}
lua_settop(L, 0); /* clear stack */
fputs("\n", stdout);
progname = oldprogname;
}
static int checkvar (lua_State *L) {
const char *name = lua_tostring(L, 2);
if (name)
luaL_error(L, "attempt to access undefined variable `%s'", name);
return 0;
}
#define clearinteractive(i) (*i &= 2)
static int handle_argv (lua_State *L, char *argv[], int *interactive) {
if (argv[1] == NULL) { /* no arguments? */
*interactive = 0;
if (stdin_is_tty())
dotty(L);
else
dofile(L, NULL); /* executes stdin as a file */
}
else { /* other arguments; loop over them */
int i;
for (i = 1; argv[i] != NULL; i++) {
if (argv[i][0] != '-') break; /* not an option? */
switch (argv[i][1]) { /* option */
case '-': { /* `--' */
if (argv[i][2] != '0円') {
print_usage();
return 1;
}
i++; /* skip this argument */
goto endloop; /* stop handling arguments */
}
case '0円': {
clearinteractive(interactive);
dofile(L, NULL); /* executes stdin as a file */
break;
}
case 'i': {
*interactive = 2; /* force interactive mode after arguments */
break;
}
case 'v': {
clearinteractive(interactive);
print_version();
break;
}
case 'w': {
if (lua_getmetatable(L, LUA_GLOBALSINDEX)) {
lua_pushcfunction(L, checkvar);
lua_setfield(L, -2, "__index");
}
break;
}
case 'e': {
const char *chunk = argv[i] + 2;
clearinteractive(interactive);
if (*chunk == '0円') chunk = argv[++i];
if (chunk == NULL) {
print_usage();
return 1;
}
if (dostring(L, chunk, "=(command line)") != 0)
return 1;
break;
}
case 'l': {
const char *filename = argv[i] + 2;
if (*filename == '0円') filename = argv[++i];
if (filename == NULL) {
print_usage();
return 1;
}
if (dolibrary(L, filename))
return 1; /* stop if file fails */
break;
}
default: {
clearinteractive(interactive);
print_usage();
return 1;
}
}
} endloop:
if (argv[i] != NULL) {
const char *filename = argv[i];
int narg = getargs(L, argv, i); /* collect arguments */
int status;
lua_setglobal(L, "arg");
clearinteractive(interactive);
status = luaL_loadfile(L, filename);
lua_insert(L, -(narg+1));
if (status == 0)
status = docall(L, narg, 0);
else
lua_pop(L, narg);
return report(L, status);
}
}
return 0;
}
static int handle_luainit (lua_State *L) {
const char *init = getenv("LUA_INIT");
if (init == NULL) return 0; /* status OK */
else if (init[0] == '@')
return dofile(L, init+1);
else
return dostring(L, init, "=LUA_INIT");
}
struct Smain {
int argc;
char **argv;
int status;
};
static int pmain (lua_State *L) {
struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
int status;
int interactive = 1;
if (s->argv[0] && s->argv[0][0]) progname = s->argv[0];
globalL = L;
luaopen_stdlibs(L); /* open libraries */
status = handle_luainit(L);
if (status == 0) {
status = handle_argv(L, s->argv, &interactive);
if (status == 0 && interactive) dotty(L);
}
s->status = status;
return 0;
}
int main (int argc, char *argv[]) {
int status;
struct Smain s;
lua_State *L = lua_open(); /* create state */
if (L == NULL) {
l_message(argv[0], "cannot create state: not enough memory");
return EXIT_FAILURE;
}
s.argc = argc;
s.argv = argv;
status = lua_cpcall(L, &pmain, &s);
report(L, status);
lua_close(L);
return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
}