Commit Graph

3 Commits

Author SHA1 Message Date
Kostya Kortchinsky 624a24e156 [scudo][standalone] Unmap memory in tests
Summary:
The more tests are added, the more we are limited by the size of the
address space on 32-bit. Implement `unmapTestOnly` all around (like it
is in sanitzer_common) to be able to free up some memory.
This is not intended to be a proper "destructor" for an allocator, but
allows us to not fail due to having no memory left.

Reviewers: morehouse, vitalybuka, eugenis, hctim

Reviewed By: morehouse

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

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D63146

llvm-svn: 363095
2019-06-11 19:50:12 +00:00
Kostya Kortchinsky 475585655d [scudo][standalone] Introduce the Secondary allocator
Summary:
The Secondary allocator wraps the platform allocation primitives. It is
meant to be used for larger sizes that the Primary can't fullfill, as
it will be slower, and sizes are multiple of the system page size.

This also changes some of the existing code, notably the opaque
platform data being passed to the platform specific functions: we can
shave a couple of syscalls on Fuchsia by storing additional data (this
addresses a TODO).

Reviewers: eugenis, vitalybuka, hctim, morehouse

Reviewed By: morehouse

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

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D60787

llvm-svn: 359097
2019-04-24 14:20:49 +00:00
Kostya Kortchinsky 7421f7bd66 [scudo][standalone] Add bytemap classes
Summary:
The bytemap classes will be used by the primary32 allocator to associate
classes with memory regions. It's similar to the sanitizer_common one
except for the fact that the base (level1) maps are mapped instead of
being static to reduce the memory footprint of an uninitialized allocator.

Reviewers: vitalybuka, eugenis, morehouse, flowerhack, dmmoore415, mcgrathr

Reviewed By: vitalybuka, morehouse

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

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D58723

llvm-svn: 355416
2019-03-05 17:36:11 +00:00