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Check the stack size before moving elements to the thread.

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Some threads have truncated stacks after finishing with an error causing
a Lua assertion failure when we put elements on the stack without first
checking whether space is available.
This commit is contained in:
batrick
2009-08-11 05:56:10 +00:00
parent 0847535287
commit 6bbfb06704
1 changed files with 2 additions and 0 deletions
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nse_nmaplib.cc
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@@ -261,6 +261,7 @@ static int aux_mutex (lua_State *L)
lua_State *thread = lua_tothread(L, lua_upvalueindex(2));
lua_pushvalue(L, lua_upvalueindex(3)); // destructor key
lua_pushvalue(L, lua_upvalueindex(4)); // destructor
luaL_checkstack(thread, 2, "adding destructor");
lua_xmove(L, thread, 2);
nse_destructor(thread, 'a');
nse_restore(thread, 0);
@@ -295,6 +296,7 @@ static int aux_mutex_done (lua_State *L)
lua_State *thread = lua_tothread(L, 1);
lua_pushvalue(L, lua_upvalueindex(1)); // aux_mutex, actual mutex closure
lua_pushliteral(L, "done");
luaL_checkstack(thread, 2, "aux_mutex_done");
lua_xmove(L, thread, 2);
if (lua_pcall(thread, 1, 0, 0) != 0) lua_pop(thread, 1); // pop error msg
return 0;