54 Commits

Author	SHA1	Message	Date
Daniel Micay	3f80895822	ignore pad argument to malloc_trim per glibc ... The pad argument is only used by the main arena for sbrk in glibc, with every other page size gap purged with MADV_DONTNEED. It makes more sense to simply treat it as an ignored legacy parameter rather than trying to come up with a sensible way to use it for keeping cached free slabs.	2018-08-30 09:36:46 -04:00
Daniel Micay	1ea997b887	add missing headers to malloc.h	2018-08-30 08:48:43 -04:00
Daniel Micay	2b0f7aa985	use a consistent name for size class integer index	2018-08-30 07:13:28 -04:00
Daniel Micay	0f5f2bf6c9	add basic initial heuristic for freeing slabs	2018-08-30 06:56:00 -04:00
Daniel Micay	456dfe4154	add support for purging and protecting empty slabs	2018-08-30 05:59:44 -04:00
Daniel Micay	bb176e09bc	remove useless code in the empty_slabs path	2018-08-30 05:45:03 -04:00
Daniel Micay	29df2429c2	empty_slabs will remain a singly-linked list	2018-08-30 05:27:51 -04:00
Daniel Micay	f94068ea63	rename free_slabs to empty_slabs	2018-08-30 04:55:39 -04:00
Daniel Micay	b6d4af872f	move libdivide.h to third_party/libdivide.h	2018-08-30 03:03:19 -04:00
Daniel Micay	6f9de3e667	add inline hint to get_size_info	2018-08-29 15:13:53 -04:00
Daniel Micay	e85c69a0a4	fix builds with prefix	2018-08-29 15:07:36 -04:00
Daniel Micay	becadc57a5	get rid of unused MIN_ALIGN definition	2018-08-29 14:18:45 -04:00
Daniel Micay	2684a98eab	add initial malloc_object_size extensions	2018-08-29 14:18:42 -04:00
Daniel Micay	0e2f3d1015	sanity check page size at runtime	2018-08-29 11:00:18 -04:00
Daniel Micay	d779d41721	wrap more memory mapping implementation details	2018-08-29 10:57:42 -04:00
Daniel Micay	1cb28531a8	add wrapper for mremap with sanity check	2018-08-29 10:43:54 -04:00
Daniel Micay	5bc6820c24	rely on mmap rounding to page size when possible	2018-08-29 03:25:00 -04:00
Daniel Micay	58d929c0f0	split out low-level memory mapping wrappers	2018-08-29 00:53:38 -04:00
Daniel Micay	8b42e8c3d6	make sure errno is always set on failure	2018-08-28 22:49:11 -04:00
Daniel Micay	66aa98dbd9	sanity-check mmap errno on failure too	2018-08-28 22:41:18 -04:00
Daniel Micay	705b6a4f8d	make non-out-of-memory mprotect errors fatal	2018-08-28 22:22:57 -04:00
Daniel Micay	19c46d16f1	check pthread_atfork return value	2018-08-28 21:31:20 -04:00
Daniel Micay	803811a6ac	add support for using mremap	2018-08-28 10:44:04 -04:00
Daniel Micay	718bf82f96	add inline hints for slab_allocate and slab_free	2018-08-27 09:29:30 -04:00
Daniel Micay	33f862ec19	add inline hints for init and enforce_init	2018-08-27 09:29:27 -04:00
Daniel Micay	67b9608ccf	avoid duplicated init code calculating slab size	2018-08-27 09:22:04 -04:00
Daniel Micay	c7b24f63f1	use libdivide for substantially faster division	2018-08-27 07:07:48 -04:00
Daniel Micay	63b0c39343	reorder size_class struct for better performance	2018-08-27 05:21:58 -04:00
Daniel Micay	14ca7d7c3f	randomize large allocation guard size	2018-08-26 04:46:12 -04:00
Daniel Micay	a13a45a17d	hold regions_lock in alloc_aligned	2018-08-26 04:37:43 -04:00
Daniel Micay	2b7c9362bb	consume fewer random bytes for slab randomization	2018-08-25 18:32:44 -04:00
Daniel Micay	c5d76179a5	improve interaction of slot rand with slot mask	2018-08-25 18:04:55 -04:00
Daniel Micay	173dd6e7a5	randomize slot selection for empty slabs too	2018-08-25 18:02:13 -04:00
Daniel Micay	c335c43dd7	simplify slab out-of-memory error handling	2018-08-25 16:41:07 -04:00
Daniel Micay	7bcfa3f08b	tune slab metadata allocation	2018-08-25 15:46:22 -04:00
Daniel Micay	4777ee0c85	special case division for page size slabs	2018-08-25 15:21:50 -04:00
Daniel Micay	ec78add6ab	define ffzl utility function	2018-08-25 03:14:07 -04:00
Daniel Micay	f08d4d31db	randomize slab slot choice	2018-08-25 03:02:39 -04:00
Daniel Micay	965c3202b4	finish implementation of zero byte size class	2018-08-25 02:48:47 -04:00
Daniel Micay	f97a0ef8b1	use a more appropriate type for masked bitmaps	2018-08-25 01:09:15 -04:00
Daniel Micay	f3c8502509	add CSPRNGs for regions and slabs	2018-08-25 00:25:33 -04:00
Daniel Micay	805bdc6087	add an extra sanity check for unallocated metadata	2018-08-24 05:22:38 -04:00
Daniel Micay	2d168b0516	check for double free slightly earlier	2018-08-24 04:51:52 -04:00
Daniel Micay	97b693d862	stop treating guard size as a constant	2018-08-24 04:07:46 -04:00
Daniel Micay	83dabbd8fa	fix handling of random bases for class regions	2018-08-24 03:52:01 -04:00
Daniel Micay	0d51459dc9	add a special memory protected 0 byte size class	2018-08-24 03:24:23 -04:00
Daniel Micay	7a86b67778	add unaligned free check for small allocations	2018-08-24 02:55:53 -04:00
Daniel Micay	2aee424b7b	fix inconsistent whitespace	2018-08-24 02:09:20 -04:00
Daniel Micay	a874a61099	adjust slot count for 12288 byte size class	2018-08-23 18:00:13 -04:00
Daniel Micay	127f110126	adjust slot count for 10240 byte size class	2018-08-23 17:56:17 -04:00