From ff12e0fb91b9072800f031cb21fb2651ee7b6251 Mon Sep 17 00:00:00 2001 From: DJ Delorie Date: Wed, 30 Oct 2019 18:03:14 -0400 Subject: Base max_fast on alignment, not width, of bins (Bug 24903) set_max_fast sets the "impossibly small" value based on, eventually, MALLOC_ALIGNMENT. The comparisons for the smallest chunk used is, eventually, MIN_CHUNK_SIZE. Note that i386 is the only platform where these are the same, so a smallest chunk *would* be put in a no-fastbins fastbin. This change calculates the "impossibly small" value based on MIN_CHUNK_SIZE instead, so that we can know it will always be impossibly small. --- malloc/malloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'malloc') diff --git a/malloc/malloc.c b/malloc/malloc.c index 5d3e82a8f6..70cc35a473 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -1621,7 +1621,7 @@ static INTERNAL_SIZE_T global_max_fast; #define set_max_fast(s) \ global_max_fast = (((s) == 0) \ - ? SMALLBIN_WIDTH : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK)) + ? MIN_CHUNK_SIZE / 2 : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK)) static inline INTERNAL_SIZE_T get_max_fast (void) -- cgit v1.2.3