tree 3c3e90a7e4fc627a691b2b9fa34c9724bd08de63
parent 84c9f24c2c4a0ce3437195e60b6f3f2d232c2770
author Hans Wennborg <hans@hanshq.net> 1487185584 +0000
committer Hans Wennborg <hans@hanshq.net> 1487185584 +0000

Merging r292729:
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r292729 | mgorny | 2017-01-21 13:55:00 -0800 (Sat, 21 Jan 2017) | 17 lines

[test] Fix page address logic in clear_cache_test

Fix the logic used to calculate page boundaries in clear_cache_test to
use correct masks -- e.g. -4096 rather than -4095. The latter gives
incorrect result since:

  -4095 -> 0xfffff001
  -4096 -> 0xfffff000 (== ~4095)

The issue went unnoticed so far because the array alignment caused
the last bit not to be set. However, on 32-bit x86 no such alignment is
enforced and the wrong page address caused the test to fail.

Furthermore, obtain the page size from the system instead of hardcoding
4096.

Differential Revision: https://reviews.llvm.org/D28849
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git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/release_40@295218 91177308-0d34-0410-b5e6-96231b3b80d8