forked from KolibriOS/kolibrios
392 lines
9.6 KiB
C
392 lines
9.6 KiB
C
/*
|
|
** $Id: ldblib.c,v 1.131 2011/10/24 14:54:05 roberto Exp $
|
|
** Interface from Lua to its debug API
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define ldblib_c
|
|
#define LUA_LIB
|
|
|
|
#include "lua.h"
|
|
|
|
#include "lauxlib.h"
|
|
#include "lualib.h"
|
|
|
|
|
|
#define HOOKKEY "_HKEY"
|
|
|
|
|
|
|
|
static int db_getregistry (lua_State *L) {
|
|
lua_pushvalue(L, LUA_REGISTRYINDEX);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int db_getmetatable (lua_State *L) {
|
|
luaL_checkany(L, 1);
|
|
if (!lua_getmetatable(L, 1)) {
|
|
lua_pushnil(L); /* no metatable */
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int db_setmetatable (lua_State *L) {
|
|
int t = lua_type(L, 2);
|
|
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
|
|
"nil or table expected");
|
|
lua_settop(L, 2);
|
|
lua_setmetatable(L, 1);
|
|
return 1; /* return 1st argument */
|
|
}
|
|
|
|
|
|
static int db_getuservalue (lua_State *L) {
|
|
if (lua_type(L, 1) != LUA_TUSERDATA)
|
|
lua_pushnil(L);
|
|
else
|
|
lua_getuservalue(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int db_setuservalue (lua_State *L) {
|
|
if (lua_type(L, 1) == LUA_TLIGHTUSERDATA)
|
|
luaL_argerror(L, 1, "full userdata expected, got light userdata");
|
|
luaL_checktype(L, 1, LUA_TUSERDATA);
|
|
if (!lua_isnoneornil(L, 2))
|
|
luaL_checktype(L, 2, LUA_TTABLE);
|
|
lua_settop(L, 2);
|
|
lua_setuservalue(L, 1);
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void settabss (lua_State *L, const char *i, const char *v) {
|
|
lua_pushstring(L, v);
|
|
lua_setfield(L, -2, i);
|
|
}
|
|
|
|
|
|
static void settabsi (lua_State *L, const char *i, int v) {
|
|
lua_pushinteger(L, v);
|
|
lua_setfield(L, -2, i);
|
|
}
|
|
|
|
|
|
static void settabsb (lua_State *L, const char *i, int v) {
|
|
lua_pushboolean(L, v);
|
|
lua_setfield(L, -2, i);
|
|
}
|
|
|
|
|
|
static lua_State *getthread (lua_State *L, int *arg) {
|
|
if (lua_isthread(L, 1)) {
|
|
*arg = 1;
|
|
return lua_tothread(L, 1);
|
|
}
|
|
else {
|
|
*arg = 0;
|
|
return L;
|
|
}
|
|
}
|
|
|
|
|
|
static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
|
|
if (L == L1) {
|
|
lua_pushvalue(L, -2);
|
|
lua_remove(L, -3);
|
|
}
|
|
else
|
|
lua_xmove(L1, L, 1);
|
|
lua_setfield(L, -2, fname);
|
|
}
|
|
|
|
|
|
static int db_getinfo (lua_State *L) {
|
|
lua_Debug ar;
|
|
int arg;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
const char *options = luaL_optstring(L, arg+2, "flnStu");
|
|
if (lua_isnumber(L, arg+1)) {
|
|
if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {
|
|
lua_pushnil(L); /* level out of range */
|
|
return 1;
|
|
}
|
|
}
|
|
else if (lua_isfunction(L, arg+1)) {
|
|
lua_pushfstring(L, ">%s", options);
|
|
options = lua_tostring(L, -1);
|
|
lua_pushvalue(L, arg+1);
|
|
lua_xmove(L, L1, 1);
|
|
}
|
|
else
|
|
return luaL_argerror(L, arg+1, "function or level expected");
|
|
if (!lua_getinfo(L1, options, &ar))
|
|
return luaL_argerror(L, arg+2, "invalid option");
|
|
lua_createtable(L, 0, 2);
|
|
if (strchr(options, 'S')) {
|
|
settabss(L, "source", ar.source);
|
|
settabss(L, "short_src", ar.short_src);
|
|
settabsi(L, "linedefined", ar.linedefined);
|
|
settabsi(L, "lastlinedefined", ar.lastlinedefined);
|
|
settabss(L, "what", ar.what);
|
|
}
|
|
if (strchr(options, 'l'))
|
|
settabsi(L, "currentline", ar.currentline);
|
|
if (strchr(options, 'u')) {
|
|
settabsi(L, "nups", ar.nups);
|
|
settabsi(L, "nparams", ar.nparams);
|
|
settabsb(L, "isvararg", ar.isvararg);
|
|
}
|
|
if (strchr(options, 'n')) {
|
|
settabss(L, "name", ar.name);
|
|
settabss(L, "namewhat", ar.namewhat);
|
|
}
|
|
if (strchr(options, 't'))
|
|
settabsb(L, "istailcall", ar.istailcall);
|
|
if (strchr(options, 'L'))
|
|
treatstackoption(L, L1, "activelines");
|
|
if (strchr(options, 'f'))
|
|
treatstackoption(L, L1, "func");
|
|
return 1; /* return table */
|
|
}
|
|
|
|
|
|
static int db_getlocal (lua_State *L) {
|
|
int arg;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
lua_Debug ar;
|
|
const char *name;
|
|
int nvar = luaL_checkint(L, arg+2); /* local-variable index */
|
|
if (lua_isfunction(L, arg + 1)) { /* function argument? */
|
|
lua_pushvalue(L, arg + 1); /* push function */
|
|
lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */
|
|
return 1;
|
|
}
|
|
else { /* stack-level argument */
|
|
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */
|
|
return luaL_argerror(L, arg+1, "level out of range");
|
|
name = lua_getlocal(L1, &ar, nvar);
|
|
if (name) {
|
|
lua_xmove(L1, L, 1); /* push local value */
|
|
lua_pushstring(L, name); /* push name */
|
|
lua_pushvalue(L, -2); /* re-order */
|
|
return 2;
|
|
}
|
|
else {
|
|
lua_pushnil(L); /* no name (nor value) */
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int db_setlocal (lua_State *L) {
|
|
int arg;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
lua_Debug ar;
|
|
if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */
|
|
return luaL_argerror(L, arg+1, "level out of range");
|
|
luaL_checkany(L, arg+3);
|
|
lua_settop(L, arg+3);
|
|
lua_xmove(L, L1, 1);
|
|
lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2)));
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int auxupvalue (lua_State *L, int get) {
|
|
const char *name;
|
|
int n = luaL_checkint(L, 2);
|
|
luaL_checktype(L, 1, LUA_TFUNCTION);
|
|
name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
|
|
if (name == NULL) return 0;
|
|
lua_pushstring(L, name);
|
|
lua_insert(L, -(get+1));
|
|
return get + 1;
|
|
}
|
|
|
|
|
|
static int db_getupvalue (lua_State *L) {
|
|
return auxupvalue(L, 1);
|
|
}
|
|
|
|
|
|
static int db_setupvalue (lua_State *L) {
|
|
luaL_checkany(L, 3);
|
|
return auxupvalue(L, 0);
|
|
}
|
|
|
|
|
|
static int checkupval (lua_State *L, int argf, int argnup) {
|
|
lua_Debug ar;
|
|
int nup = luaL_checkint(L, argnup);
|
|
luaL_checktype(L, argf, LUA_TFUNCTION);
|
|
lua_pushvalue(L, argf);
|
|
lua_getinfo(L, ">u", &ar);
|
|
luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index");
|
|
return nup;
|
|
}
|
|
|
|
|
|
static int db_upvalueid (lua_State *L) {
|
|
int n = checkupval(L, 1, 2);
|
|
lua_pushlightuserdata(L, lua_upvalueid(L, 1, n));
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int db_upvaluejoin (lua_State *L) {
|
|
int n1 = checkupval(L, 1, 2);
|
|
int n2 = checkupval(L, 3, 4);
|
|
luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
|
|
luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
|
|
lua_upvaluejoin(L, 1, n1, 3, n2);
|
|
return 0;
|
|
}
|
|
|
|
|
|
#define gethooktable(L) luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY);
|
|
|
|
|
|
static void hookf (lua_State *L, lua_Debug *ar) {
|
|
static const char *const hooknames[] =
|
|
{"call", "return", "line", "count", "tail call"};
|
|
gethooktable(L);
|
|
lua_rawgetp(L, -1, L);
|
|
if (lua_isfunction(L, -1)) {
|
|
lua_pushstring(L, hooknames[(int)ar->event]);
|
|
if (ar->currentline >= 0)
|
|
lua_pushinteger(L, ar->currentline);
|
|
else lua_pushnil(L);
|
|
lua_assert(lua_getinfo(L, "lS", ar));
|
|
lua_call(L, 2, 0);
|
|
}
|
|
}
|
|
|
|
|
|
static int makemask (const char *smask, int count) {
|
|
int mask = 0;
|
|
if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
|
|
if (strchr(smask, 'r')) mask |= LUA_MASKRET;
|
|
if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
|
|
if (count > 0) mask |= LUA_MASKCOUNT;
|
|
return mask;
|
|
}
|
|
|
|
|
|
static char *unmakemask (int mask, char *smask) {
|
|
int i = 0;
|
|
if (mask & LUA_MASKCALL) smask[i++] = 'c';
|
|
if (mask & LUA_MASKRET) smask[i++] = 'r';
|
|
if (mask & LUA_MASKLINE) smask[i++] = 'l';
|
|
smask[i] = '\0';
|
|
return smask;
|
|
}
|
|
|
|
|
|
static int db_sethook (lua_State *L) {
|
|
int arg, mask, count;
|
|
lua_Hook func;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
if (lua_isnoneornil(L, arg+1)) {
|
|
lua_settop(L, arg+1);
|
|
func = NULL; mask = 0; count = 0; /* turn off hooks */
|
|
}
|
|
else {
|
|
const char *smask = luaL_checkstring(L, arg+2);
|
|
luaL_checktype(L, arg+1, LUA_TFUNCTION);
|
|
count = luaL_optint(L, arg+3, 0);
|
|
func = hookf; mask = makemask(smask, count);
|
|
}
|
|
gethooktable(L);
|
|
lua_pushvalue(L, arg+1);
|
|
lua_rawsetp(L, -2, L1); /* set new hook */
|
|
lua_pop(L, 1); /* remove hook table */
|
|
lua_sethook(L1, func, mask, count); /* set hooks */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int db_gethook (lua_State *L) {
|
|
int arg;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
char buff[5];
|
|
int mask = lua_gethookmask(L1);
|
|
lua_Hook hook = lua_gethook(L1);
|
|
if (hook != NULL && hook != hookf) /* external hook? */
|
|
lua_pushliteral(L, "external hook");
|
|
else {
|
|
gethooktable(L);
|
|
lua_rawgetp(L, -1, L1); /* get hook */
|
|
lua_remove(L, -2); /* remove hook table */
|
|
}
|
|
lua_pushstring(L, unmakemask(mask, buff));
|
|
lua_pushinteger(L, lua_gethookcount(L1));
|
|
return 3;
|
|
}
|
|
|
|
|
|
static int db_debug (lua_State *L) {
|
|
for (;;) {
|
|
char buffer[250];
|
|
luai_writestringerror("%s", "lua_debug> ");
|
|
if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
|
|
strcmp(buffer, "cont\n") == 0)
|
|
return 0;
|
|
if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
|
|
lua_pcall(L, 0, 0, 0))
|
|
luai_writestringerror("%s\n", lua_tostring(L, -1));
|
|
lua_settop(L, 0); /* remove eventual returns */
|
|
}
|
|
}
|
|
|
|
|
|
static int db_traceback (lua_State *L) {
|
|
int arg;
|
|
lua_State *L1 = getthread(L, &arg);
|
|
const char *msg = lua_tostring(L, arg + 1);
|
|
if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */
|
|
lua_pushvalue(L, arg + 1); /* return it untouched */
|
|
else {
|
|
int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0);
|
|
luaL_traceback(L, L1, msg, level);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static const luaL_Reg dblib[] = {
|
|
{"debug", db_debug},
|
|
{"getuservalue", db_getuservalue},
|
|
{"gethook", db_gethook},
|
|
{"getinfo", db_getinfo},
|
|
{"getlocal", db_getlocal},
|
|
{"getregistry", db_getregistry},
|
|
{"getmetatable", db_getmetatable},
|
|
{"getupvalue", db_getupvalue},
|
|
{"upvaluejoin", db_upvaluejoin},
|
|
{"upvalueid", db_upvalueid},
|
|
{"setuservalue", db_setuservalue},
|
|
{"sethook", db_sethook},
|
|
{"setlocal", db_setlocal},
|
|
{"setmetatable", db_setmetatable},
|
|
{"setupvalue", db_setupvalue},
|
|
{"traceback", db_traceback},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
|
|
LUAMOD_API int luaopen_debug (lua_State *L) {
|
|
luaL_newlib(L, dblib);
|
|
return 1;
|
|
}
|
|
|