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| author |   DJ Delorie <dj@redhat.com> | 2019-10-30 18:03:14 -0400 |
|---|---|---|
| committer |   Andreas K. Hüttel <dilfridge@gentoo.org> | 2019-11-25 23:02:26 +0100 |
| commit | adedd77b84123fd97f9162f8f8a6847bdad19d48 (patch) | |
| tree | ed31671f0f4635235223cc06f2cbbcc1bdc746a7 | |
| parent | malloc: Various cleanups for malloc/tst-mxfast (diff) | |
| download | glibc-adedd77b84123fd97f9162f8f8a6847bdad19d48.tar.gz glibc-adedd77b84123fd97f9162f8f8a6847bdad19d48.tar.bz2 glibc-adedd77b84123fd97f9162f8f8a6847bdad19d48.zip | |
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.
(cherry picked from commit ff12e0fb91b9072800f031cb21fb2651ee7b6251)
(cherry picked from commit 919af705eef416f4469341dfdf4ca23450f30236)
| -rw-r--r-- | malloc/malloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index fe973770a6..8c68b21b2b 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) |