Commit Graph

6 Commits

Author SHA1 Message Date
Kostya Serebryany 1e4498869d [hwasan] get rid of some macros, remove the fixed shadow mapping
llvm-svn: 340983
2018-08-29 22:42:16 +00:00
Kostya Serebryany 5d26313ce0 [hwasan] formatting change, NFC
llvm-svn: 340980
2018-08-29 22:23:34 +00:00
Alex Shlyapnikov 79866cad6f [HWASan] Introduce non-zero based and dynamic shadow memory (compiler-rt).
Retire the fixed shadow memory mapping to avoid conflicts with default
process memory mapping (currently manifests on Android).

Tests on AArch64 show <1% performance loss and code size increase,
making it possible to use dynamic shadow memory by default.

Keep the fixed shadow memory mapping around to be able to run
performance comparison tests later.

Re-commiting D45847 with fixed shadow for x86-64.

llvm-svn: 330624
2018-04-23 18:19:23 +00:00
Reid Kleckner 061fcd586d Revert r330474 - "[HWASan] Introduce non-zero based and dynamic shadow memory (compiler-rt)."
This commit causes internal errors with ld.bfd 2.24. My guess is that
the ifunc usage in this commit is causing problems. This is the default
system linker on Trusty Tahr, which is from 2014. I claim it's still in
our support window. Maybe we will decide to drop support for it, but
let's get the bots green while we do the investigation and have that
discussion.

Discovered here: https://crbug.com/835864

llvm-svn: 330619
2018-04-23 17:26:33 +00:00
Alex Shlyapnikov c3ec1643f1 [HWASan] Introduce non-zero based and dynamic shadow memory (compiler-rt).
Summary:
Retire the fixed shadow memory mapping to avoid conflicts with default
process memory mapping (currently manifests on Android).

Tests on AArch64 show <1% performance loss and code size increase,
making it possible to use dynamic shadow memory by default.

For the simplicity and unifirmity sake, use dynamic shadow memory mapping
with base address accessed via ifunc resolver on all supported platforms.

Keep the fixed shadow memory mapping around to be able to run
performance comparison tests later.

Complementing D45840.

Reviewers: eugenis

Subscribers: srhines, kubamracek, dberris, mgorny, kristof.beyls, delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D45847

llvm-svn: 330474
2018-04-20 20:03:57 +00:00
Evgeniy Stepanov 9595d16893 Hardware-assisted AddressSanitizer (compiler-rt)
Summary:
Runtime library for HWASan, initial commit.
Does not randomize tags yet, does not handle stack or globals.

Reviewers: kcc, pcc, alekseyshl

Subscribers: srhines, kubamracek, dberris, mgorny, llvm-commits, krytarowski

Differential Revision: https://reviews.llvm.org/D40935

llvm-svn: 320231
2017-12-09 01:31:51 +00:00