gh-156049: Add support for building with HWASAN - #156721
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Co-authored-by: Florian Mayer <fmayer@google.com> Co-authored-by: Anna <araslanova.anna.a@gmail.com>
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August 31, 2026 15:21
This was referenced Aug 31, 2026
Documentation build overview
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fmayer
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Aug 31, 2026
| Enable HWAddressSanitizer memory error detector, ``hwasan`` (default is no). | ||
| Note that on x86-64 this uses `page aliasing | ||
| <https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html#supported-architectures>`_, | ||
| which only tags heap allocations and is unsafe for programs that ``fork()``, |
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I think implicitly this means "Do not use on x86-64", right?
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Pretty much, you could try using it if you're careful (as such it's an option).
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This supersedes GH-149166 and GH-156050, pulling in their changes and adding a
--with-hwaddress-sanitizerconfigure option as well as a few little miscellaneous changes for better support. Note that x86-64 has to use clang's page aliasingmode, which shares the heap across
fork(), so the test suite is only reliableon AArch64.
@AnnaAr321 and @fmayer I'd appreciate your reviews :-)