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[scudo][standalone] Introduce the thread specific data structures

Authored by cryptoad on Jun 10 2019, 9:50 AM.

Description

[scudo][standalone] Introduce the thread specific data structures

Summary:
This CL adds the structures dealing with thread specific data for the
allocator. This includes the thread specific data structure itself and
two registries for said structures: an exclusive one, where each thread
will have its own TSD struct, and a shared one, where a pool of TSD
structs will be shared by all threads, with dynamic reassignment at
runtime based on contention.

This departs from the current Scudo implementation: we intend to make
the Registry a template parameter of the allocator (as opposed to a
single global entity), allowing various allocators to coexist with
different TSD registry models. As a result, TSD registry and Allocator
are tightly coupled.

This also corrects a couple of things in other files that I noticed
while adding this.

Reviewers: eugenis, vitalybuka, morehouse, hctim

Reviewed By: morehouse

Subscribers: srhines, mgorny, delcypher, jfb, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D62258

llvm-svn: 362962

Details

Committed
cryptoadJun 10 2019, 9:50 AM
Reviewer
morehouse
Differential Revision
D62258: [scudo][standalone] Introduce the thread specific data structures
Parents
rG9aff1ddc14f3: ABI: reflow the table text (NFC)
Branches
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Tags
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