Author: hctim Date: Wed Feb 13 15:14:54 2019 New Revision: 353990 URL: http://llvm.org/viewvc/llvm-project?rev=353990&view=rev Log: [HWASAN] Updated HWASAN design document to better portray the chance of missing a bug.
Summary: Provided rule of thumb percentage chances of miss for 4 and 8 bit tag sizes. Subscribers: cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D58195 Modified: cfe/trunk/docs/HardwareAssistedAddressSanitizerDesign.rst Modified: cfe/trunk/docs/HardwareAssistedAddressSanitizerDesign.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/HardwareAssistedAddressSanitizerDesign.rst?rev=353990&r1=353989&r2=353990&view=diff ============================================================================== --- cfe/trunk/docs/HardwareAssistedAddressSanitizerDesign.rst (original) +++ cfe/trunk/docs/HardwareAssistedAddressSanitizerDesign.rst Wed Feb 13 15:14:54 2019 @@ -131,7 +131,8 @@ HWASAN: https://www.kernel.org/doc/Documentation/arm64/tagged-pointers.txt). * **Does not require redzones to detect buffer overflows**, but the buffer overflow detection is probabilistic, with roughly - `(2**TS-1)/(2**TS)` probability of catching a bug. + `1/(2**TS)` chance of missing a bug (6.25% or 0.39% with 4 and 8-bit TS + respectively). * **Does not require quarantine to detect heap-use-after-free, or stack-use-after-return**. The detection is similarly probabilistic. _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
