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Merge pull request #122 from elua/fix_stack_corruption

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Fix a stack corruption problem observed in nodemcu-firmware
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Bogdan Marinescu 2018-04-26 16:42:31 +03:00 committed by GitHub
commit f1638eb19f
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1 changed files with 3 additions and 0 deletions
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src/lua/ldo.c
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@ -145,8 +145,11 @@ static void correctstack (lua_State *L, TValue *oldstack) {
void luaD_reallocstack (lua_State *L, int newsize) {
TValue *oldstack = L->stack;
int realsize = newsize + 1 + EXTRA_STACK;
int block_status = is_block_gc(L);
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1);
set_block_gc(L); /* The GC MUST be blocked during stack reallocaiton */
luaM_reallocvector(L, L->stack, L->stacksize, realsize, TValue);
if (!block_status) unset_block_gc(L); /* Honour the previous block status */
L->stacksize = realsize;
L->stack_last = L->stack+newsize;
correctstack(L, oldstack);