PANIC in lj_cdata_setfin() on out of memory
- From: Roman Tsisyk <roman@xxxxxxxxxxxxx>
- To: luajit <luajit@xxxxxxxxxxxxx>
- Date: Thu, 23 Oct 2014 20:09:09 +0400
Hi,
LuaJIT panics if there is no more memory available to resize internal
finalizers table:
```
local ffi = require('ffi')
function on_gc(t)
end
local result = {}
local i = 1
while true do
-- Make a lot void* objects with finalizers
local t = ffi.gc(ffi.cast('void *', NULL), on_gc)
result[i] = t
i = i + 1
if i % 100000 == 0 then
print('i', i)
end
end
```
```
luajit test.lua
...
i 134100000
i 134200000
PANIC: unprotected error in call to Lua API (not enough memory)
```
v2.0.3-37-g6d0654d
We found problem code and added a breakpoint:
```
#1 0x00000000004fa683 in lj_err_throw ()
#2 0x00000000004fa8c3 in lj_err_mem ()
#3 0x00000000004f9be2 in lj_mem_realloc ()
#4 0x00000000004fc5fc in resizetab ()
#5 0x00000000004fc8a8 in rehashtab ()
#6 0x00000000004fc95d in lj_tab_newkey ()
#7 0x000000000050d8fe in lj_cdata_setfin ()
#8 0x000000000bdaf95e in TRACE_6 () at (string):58
#9 0x00000000004a0569 in lbox_call (L=0x400fb820, nargs=3, nreturns=-1) at
/home/alyapunov/Work/tarantool/src/lua/utils.h:442
```
Thanks to https://github.com/alyapunov for debugging this problem.
--
WBR,
Roman Tsisyk <roman@xxxxxxxxxxxxx>
http://tarantool.org/ - an efficient in-memory data store and a Lua
application server
http://try.tarantool.org/ - try your Lua code **online**
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