base/allocator/partition_allocator/PartitionAlloc.md - Issue 2518253002: Move Partition Allocator into Chromium base.

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Issue 2518253002: Move Partition Allocator into Chromium base. (Closed)

Patch Set: Respond to more of Primiano's comments; move PartitionAllocator.* back to wtf; some build fixes Created 4 years ago

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1 # PartitionAlloc Design	1 # PartitionAlloc Design

2	2

3 This document explains a high-level design of PartitionAlloc.	3 This document explains a high-level design of PartitionAlloc.

4 If you're interested in its in-depth implementation, see comments	4 If you're interested in its in-depth implementation, see comments

5 in PartitionAlloc.h.	5 in PartitionAlloc.h.

6	6

7 [TOC]	7 [TOC]

8	8

9 ## Overview	9 ## Overview

10	10

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88 Linear overflow or underflow cannot corrupt the metadata.	88 Linear overflow or underflow cannot corrupt the metadata.

89	89

90 * Buckets are helpful to allocate different-sized objects on different addresses .	90 * Buckets are helpful to allocate different-sized objects on different addresses .

91 One page can contain only similar-sized objects.	91 One page can contain only similar-sized objects.

92	92

93 * Dereference of a freelist pointer should fault.	93 * Dereference of a freelist pointer should fault.

94	94

95 * Partial pointer overwrite of freelist pointer should fault.	95 * Partial pointer overwrite of freelist pointer should fault.

96	96

97 * Large allocations are guard-paged at the beginning and end.	97 * Large allocations are guard-paged at the beginning and end.

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