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Comments + manual + identation + asserts about stack limits that were
not allowing the use of the full stack
This commit is contained in:
Roberto Ierusalimschy
2022-04-01 13:55:44 -03:00
parent 8426d9b4d4
commit f3cfd5bf2b
4 changed files with 17 additions and 6 deletions
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8
ldo.c
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@@ -213,7 +213,7 @@ int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) {
/*
** Try to grow the stack by at least 'n' elements. when 'raiseerror'
** Try to grow the stack by at least 'n' elements. When 'raiseerror'
** is true, raises any error; otherwise, return 0 in case of errors.
*/
int luaD_growstack (lua_State *L, int n, int raiseerror) {
@@ -247,6 +247,10 @@ int luaD_growstack (lua_State *L, int n, int raiseerror) {
}
/*
** Compute how much of the stack is being used, by computing the
** maximum top of all call frames in the stack and the current top.
*/
static int stackinuse (lua_State *L) {
CallInfo *ci;
int res;
@@ -254,7 +258,7 @@ static int stackinuse (lua_State *L) {
for (ci = L->ci; ci != NULL; ci = ci->previous) {
if (lim < ci->top) lim = ci->top;
}
lua_assert(lim <= L->stack_last);
lua_assert(lim <= L->stack_last + EXTRA_STACK);
res = cast_int(lim - L->stack) + 1; /* part of stack in use */
if (res < LUA_MINSTACK)
res = LUA_MINSTACK; /* ensure a minimum size */