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(This is the second time I sent this
message -- it never showed up on the list the first time, for me.
Apologies if this shows up multiple times) Hi, I'm looking for some help figuring out a crash we're seeing in the
garbage collection process. We're using LUA 5.1 on the PS3 for game
logic scripting. We have already shipped games using this technology with
no problems (Ratchet & Clank Future). On our current project,
however, we've run into an odd crash. Whenever a specific script is
loaded, the game will crash deep in the LUA garbage collection code. The
script in question is unremarkable -- it just creates a bunch of very simple tables
in the form: TableName = { Var1, Var2, Var3, Var4,
<etc> } ... essentially just creating groups of
userdata objects. It also defines a handful of very simple
functions. It is possible that this script is not directly responsible,
but is instead indirectly putting the LUA state into some odd condition.
If we don’t run the script, LUA runs fine. We are using a slightly modified version
of LUA (floats instead of doubles) and a modified version of toLua for bindings
(probably not relevant). However, like I said, these systems have been
used for a long time without this crash occurring. I've ruled out app-side memory allocation
problems with about 99% certainty (we have a lot of memory logging going on,
and a ton of free memory for LUA to use). Can anyone give me any hints as to what
*might* cause this crash? Any suggestions or clues will be helpful.
It seems at first glance that there is a table with a nil key, but I don’t know how that
could possibly come into existence in the first place. Crash details: ---------------------this
is the code----------------------- X:\<snip>\lua\src\lgc.c
line number 190 static int traversetable (global_State *g,
Table *h) { <snip> else {
lua_assert(!ttisnil(gkey(n))); // looks like we hit this assert if (!weakkey)
markvalue(g, gkey(n)); if
(!weakvalue) markvalue(g, gval(n)); } } return weakkey || weakvalue; } ---------------------this is the
callstack-----------------------
Type
Function
int
traversetable(global_State * g, Table * h)
l_mem propagatemark(global_State *
g)
l_mem singlestep(lua_State *
L)
void luaC_step(lua_State *
L)
int lua_gc(lua_State * L, int what, int
data)
void
LUA::ScriptManager::CollectGarbage()
void LUA::ScriptManager::Update() <snip>
int main(int argc, char **
argv)
_initialize()
_start() Thanks, Andrew Yount Lead Programmer, Insomniac Games |