Thurston Dang b1338d1e3a [tsan] Shrink RiscV64 48-bit LowApp region slightly to speed up TSan RestoreAddr (#72316) ...

The RiscV64 48-bit mappings introduced in
46cb8d9a32 necessitated changing
RestoreAddr to use 4-bits as the indicator. This roughly halves the
speed of RestoreAddr, because it is now brute-force testing addresses in
1TB increments, rather than 2TB increments. Crucially, this slowdown
applies to TSan on all platforms, not just RiscV64 48-bit.

This patch slightly shrinks the RiscV64 48-bit LowApp region mapping
(from 5TB to 4TB); we hope that 4TB ought to be enough for anybody,
especially since there is no ASLR applied to the binary in this region.
This allows restoring RestoreAddr to use 3-bits as the indicator again,
thus speeding up TSan on all platforms.

Co-authored-by: Thurston Dang <thurston@google.com>

2023-11-17 09:27:32 -08:00

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benchmarks

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dd

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go

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rtl

[tsan] Shrink RiscV64 48-bit LowApp region slightly to speed up TSan RestoreAddr (#72316)

2023-11-17 09:27:32 -08:00

tests

[compiler-rt] Avoid memintrinsic calls inserted by the compiler

2023-06-06 16:10:45 +02:00

.clang-format

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analyze_libtsan.sh

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check_analyze.sh

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check_cmake.sh

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CMakeLists.txt

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