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commit 6298903e35217ab69c279056f925fb72900ce0b7
parent b57574d6fb9071b2f8f261b32c9378ed72db7023
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Mon,  6 Jul 2020 12:11:27 -0300

Keep minimum size when shrinking a stack

When shrinking a stack (during GC), do not make it smaller than the
initial stack size.

Diffstat:
Mldo.c | 5++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/ldo.c b/ldo.c @@ -245,13 +245,12 @@ static int stackinuse (lua_State *L) { void luaD_shrinkstack (lua_State *L) { int inuse = stackinuse(L); - int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK; + int goodsize = inuse + BASIC_STACK_SIZE; if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK; /* respect stack limit */ /* if thread is currently not handling a stack overflow and its good size is smaller than current size, shrink its stack */ - if (inuse <= (LUAI_MAXSTACK - EXTRA_STACK) && - goodsize < L->stacksize) + if (inuse <= (LUAI_MAXSTACK - EXTRA_STACK) && goodsize < L->stacksize) luaD_reallocstack(L, goodsize, 0); /* ok if that fails */ else /* don't change stack */ condmovestack(L,{},{}); /* (change only for debugging) */