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| author | Tom Cherry <tomcherry@google.com> | 2017-11-17 17:14:05 -0800 |
|---|---|---|
| committer | Tom Cherry <tomcherry@google.com> | 2017-12-12 00:36:20 -0800 |
| commit | 79b724ca5a33e5dff7c2530b2649648021c1258d (patch) | |
| tree | 703e81d1d3c41fe093f4747d4d7d4324427dde2c /libc/stdio/stdio.cpp | |
| parent | 78b40e8fe1f37de319344c92d8e6e1eb595c1067 (diff) | |
Add support for serialized property contexts
This adds support for reading a serialized
/dev/__properties__/property_info file, which contains a
serialized trie that maps property names to the SELinux context to
which they belong.
Performance wise on walleye, this change reduces the start up cost in
libc from ~3000us to ~430us. On a benchmark that calls
__system_property_find() for each property set on the system, it
reduces the time per iteration from ~650us to ~292us.
Bug: 36001741
Test: Boot bullhead, walleye, run unit tests
Test: Benchmark initialization and lookup performance
Change-Id: I0887a3a7da88eb51b6d1bd494fa5bce593423599
Diffstat (limited to 'libc/stdio/stdio.cpp')
0 files changed, 0 insertions, 0 deletions