Re: Sandbox causes hang!

I tried running your code interactively in Lua, and it mostly worked.  How
is your test.lua setup however.  With simply just a:
function foo()
  print( 'Foooo!' )
end

the tables mylib and mylib.test are not created, and the function is global.

Perhaps this is a clue to your hang.

Nigel

On Tue, February 1, 2011 12:47 am, Kristoffer Danielsson wrote:
>
> I found the problem. If function "foo" does not exist in mylib\test.lua,
> then it hangs.
> However, this only happens when I have applied my sandbox code. Not sure
> how to interpret this.
>
> Chris
>
>> From: [email protected]
>> To: [email protected]
>> Date: Mon, 31 Jan 2011 23:37:20 +1100
>> Subject: Re: [luabind] Sandbox causes hang!
>>
>> At a quick glance your 'foo' function looks like it might be calling
>> itself...
>>
>> Nigel
>>
>> On Mon, 2011-01-31 at 12:05 +0100, Kristoffer Danielsson wrote:
>> > Luabind 0.9.1 and Lua 5.1.4. Consider this sandbox code:
>> >
>> > "load = nil\n
>> > loadfile = nil\n
>> > dofile = nil\n
>> > package.loadlib = nil\n
>> > package.loaders[3] = nil\n
>> > package.loaders[4] = nil\n
>> > package.path =
>> > 'C:/Users/Test/Desktop/MyApp/Scripts/?;C:/Users/Test/MyApp/Scripts/?.lua;C:/Users/Test/Desktop/MyApp/Scripts/'\n
>> > "
>> >
>> > After executing that, I run this script (located in C:\Users\Test
>> > \Desktop\MyApp):
>> > require 'mylib.test' -- C:\Users\Test\Desktop\MyApp\mylib\test.lua
>> > does exist!
>> >
>> > function foo()
>> > return mylib.test.foo()
>> > end
>> >
>> > Then I call "foo":
>> > luabind::call_function<string>(L, "foo");
>> >
>> > The script that hangs! It seems to get stuck in the for-loop in
>> > lvm.c(385):
>> >
>> > case OP_GETGLOBAL: {
>> > TValue g;
>> > TValue *rb = KBx(i);
>> > sethvalue(L, &g, cl->env);
>> > lua_assert(ttisstring(rb));
>> > Protect(luaV_gettable(L, &g, rb, ra)); // I keep getting here.
>> > Forever...
>> > continue;
>> >
>> >
>> > What's wrong with my sandbox code? If I remove the assignment of
>> > "package.path", it works! Also, the above seems to work for some
>> > scripts with the same logic. Don't get it...
>> >
>> > Please help!
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Finally, a world-class log management solution at an even better price-free!
Download using promo code Free_Logger_4_Dev2Dev. Offer expires 
February 28th, so secure your free ArcSight Logger TODAY! 
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