static void handle(int sig)
{
if(!signal_queue)
{
/* Store the existing debug hook (if any) and its parameters */
Hsig = lua_gethook(Lsig);
Hmask = lua_gethookmask(Lsig);
Hcount = lua_gethookcount(Lsig);
signal_queue = malloc(sizeof(struct signal_event));
signal_queue->Nsig = sig;
signal_queue->next_event = NULL;
last_event = signal_queue;
/* Set our new debug hook */
lua_sethook(Lsig, sighook, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
}
else
{
last_event->next_event = malloc(sizeof(struct signal_event));
last_event->next_event->Nsig = sig;
last_event->next_event->next_event = NULL;
last_event = last_event->next_event;
}
}
static void vx_sighandler(int sig) {
sign = sig;
sigh = lua_gethook(GL);
hcnt = lua_gethookcount(GL);
hmask = lua_gethookmask(GL);
lua_sethook(GL, vx_sighook, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
}
static void l_signal(int i)
{ /* assert(i==SIGALRM); */
signal(i,SIG_DFL);
oldhook=lua_gethook(LL);
oldmask=lua_gethookmask(LL);
oldcount=lua_gethookcount(LL);
lua_sethook(LL,l_handler,LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT,1);
}
static void handle (int sig)
{
assert(ML != NULL);
if (old_hook.hook == NULL) /* replace it */
{
old_hook.hook = lua_gethook(ML);
old_hook.mask = lua_gethookmask(ML);
old_hook.count = lua_gethookcount(ML);
lua_sethook(ML, hook, LUA_MASKCOUNT, 1);
}
signal_stack[sig]++;
}
static void signal_handler(int sig)
{
if (q.size == 0) {
old_hook = lua_gethook(gL);
old_mask = lua_gethookmask(gL);
old_count = lua_gethookcount(gL);
lua_sethook(gL, lua_signal_handler,
LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
}
enqueue(&q, sig);
}
static int gethook (lua_State *L) {
char buff[5];
int mask = lua_gethookmask(L);
lua_Hook hook = lua_gethook(L);
if (hook != NULL && hook != hookf) /* external hook? */
lua_pushliteral(L, "external hook");
else {
lua_pushlightuserdata(L, (void *)&KEY_HOOK);
lua_rawget(L, LUA_REGISTRYINDEX); /* get hook */
}
lua_pushstring(L, unmakemask(mask, buff));
lua_pushnumber(L, (lua_Number)lua_gethookcount(L));
return 3;
}
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;
}
void
luaQ_getfield(struct lua_State *L, int index, const char *name)
{
lua_pushvalue(L, index);
lua_pushcfunction(L, luaQ_gettable);
lua_insert(L, -2);
lua_pushstring(L, name);
lua_Hook hf = lua_gethook(L);
int hm = lua_gethookmask(L);
int hc = lua_gethookcount(L);
lua_sethook(L, 0, 0, 0);
if (lua_pcall(L, 2, 1, 0))
{
lua_pop(L, 1);
lua_pushnil(L);
}
lua_sethook(L, hf, hm, hc);
}
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) /* no hook? */
lua_pushnil(L);
else if (hook != hookf) /* external hook? */
lua_pushliteral(L, "external hook");
else { /* hook table must exist */
lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
lua_pushthread(L1); lua_xmove(L1, L, 1);
lua_rawget(L, -2); /* 1st result = hooktable[L1] */
lua_remove(L, -2); /* remove hook table */
}
lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */
lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */
return 3;
}
size_t instruction_usage(lua_sandbox* lsb)
{
return lua_gethookcount(lsb->m_lua) - lua_gethookcountremaining(lsb->m_lua);
}
int LuaDebug::GetHookCount() const
{
return lua_gethookcount(L());
}
