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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-01-19 01:54:09 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2019-01-19 01:54:09 +0000 |
| commit | c089fbbaf28698d340e3a958e4e9cee9e519a68c (patch) | |
| tree | 9ae65fbeb4ac59a09f3e068a46874923eecdd045 /llvm/lib/Transforms/Utils/CodeExtractor.cpp | |
| parent | 022bf3e8e7b06daf01fbacad224d2bf0c1919a3e (diff) | |
| download | bcm5719-llvm-c089fbbaf28698d340e3a958e4e9cee9e519a68c.tar.gz bcm5719-llvm-c089fbbaf28698d340e3a958e4e9cee9e519a68c.zip | |
[hwasan] Madvise away unused shadow.
Summary:
Whenever a large shadow region is tagged to zero, madvise(DONT_NEED)
as much of it as possible.
This reduces shadow RSS on Android by 45% or so, and total memory use
by 2-4%, probably even more on long running multithreaded programs.
CPU time seems to be in the noise.
Reviewers: kcc, pcc
Subscribers: srhines, kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D56757
llvm-svn: 351620
Diffstat (limited to 'llvm/lib/Transforms/Utils/CodeExtractor.cpp')
0 files changed, 0 insertions, 0 deletions
