Commit graph

9 commits

Author SHA1 Message Date
Sahan Fernando
6fb08f20e3 LibC: Expose PAGE_ROUND_UP in mallocdefs.h 2021-06-12 22:50:40 +04:30
Brian Gianforcaro
e37f39d980 LibC: Switch ChunkedBlock to IntrusiveList from InlineLinkedList 2021-06-03 13:27:40 +02:00
Andreas Kling
7957f13e98 Revert "LibC: Simplify malloc size classes"
This reverts commit f91bcb8895.
2021-05-18 08:32:05 +02:00
Lenny Maiorani
f91bcb8895 LibC: Simplify malloc size classes
Problem:
- `size_classes` is a C-style array which makes it difficult to use in
  algorithms.
- `all_of` algorithm is re-written for the specific implementation.

Solution:
- Change `size_classes` to be an `Array`.
- Directly use the generic `all_of` algorithm instead of
  reimplementing.
2021-05-18 08:06:01 +02:00
Gunnar Beutner
3438829431 LibC: Lazily initialize malloc chunks
By default malloc manages memory internally in larger blocks. When
one of those blocks is added we initialize a free list by touching
each of the new block's pages, thereby committing all that memory
upfront.

This changes malloc to build the free list on demand which as a
bonus also distributes the latency hit for new blocks more evenly
because the page faults for the zero pages now don't happen all at
once.
2021-05-06 10:38:46 +02:00
Idan Horowitz
edfe81b1ee LibC: static_assert that all malloc size classes have an alignment of 8
This will help prevent issues like the one fixed by #6703 from
happening again.
2021-04-28 19:57:06 +02:00
Gunnar Beutner
ae5ee2220c LibC: Make sure malloc() returns addresses that have an alignment of 8 2021-04-28 14:26:56 +02:00
Brian Gianforcaro
1682f0b760 Everything: Move to SPDX license identifiers in all files.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.

See: https://spdx.dev/resources/use/#identifiers

This was done with the `ambr` search and replace tool.

 ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 11:22:27 +02:00
Andreas Kling
13d7c09125 Libraries: Move to Userland/Libraries/ 2021-01-12 12:17:46 +01:00
Renamed from Libraries/LibC/mallocdefs.h (Browse further)