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author | Kostya Kortchinsky <kostyak@google.com> | 2017-01-18 17:11:17 +0000 |
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committer | Kostya Kortchinsky <kostyak@google.com> | 2017-01-18 17:11:17 +0000 |
commit | 90a89f08a361a74276ffbb3d232301fe6fb6363f (patch) | |
tree | a2ba3f0671fac9d56aafc701e4256e8f57499a9c /lib/scudo/scudo_allocator.h | |
parent | 1a0f6f34b0e78ed6112fa1d511396a58f7080c49 (diff) |
[scudo] Refactor of CRC32 and ARM runtime CRC32 detection
Summary:
ARM & AArch64 runtime detection for hardware support of CRC32 has been added
via check of the AT_HWVAL auxiliary vector.
Following Michal's suggestions in D28417, the CRC32 code has been further
changed and looks better now. When compiled with full relro (which is strongly
suggested to benefit from additional hardening), the weak symbol for
computeHardwareCRC32 is read-only and the assembly generated is fairly clean
and straight forward. As suggested, an additional optimization is to skip
the runtime check if SSE 4.2 has been enabled globally, as opposed to only
for scudo_crc32.cpp.
scudo_crc32.h has no purpose anymore and was removed.
Reviewers: alekseyshl, kcc, rengolin, mgorny, phosek
Reviewed By: rengolin, mgorny
Subscribers: aemerson, rengolin, llvm-commits
Differential Revision: https://reviews.llvm.org/D28574
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@292409 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/scudo/scudo_allocator.h')
-rw-r--r-- | lib/scudo/scudo_allocator.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/scudo/scudo_allocator.h b/lib/scudo/scudo_allocator.h index 6431a2aa0..b9fc82dc6 100644 --- a/lib/scudo/scudo_allocator.h +++ b/lib/scudo/scudo_allocator.h @@ -18,6 +18,10 @@ #include "sanitizer_common/sanitizer_allocator.h" +#if !SANITIZER_LINUX +# error "The Scudo hardened allocator is currently only supported on Linux." +#endif + #include <atomic> namespace __scudo { |