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[llvm][docs] MemTagSanitizer is only supported on AArch64 Android #120545

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Merged
merged 3 commits into from
Dec 20, 2024
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[llvm][docs] MemTagSanitizer is only supported on AArch64 Android #120545

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[llvm][docs] MemTagSanitizer is only supported on AArch64 Android
DavidSpickett Dec 19, 2024
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suggest -xclang, clean up grammar
DavidSpickett Dec 19, 2024
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--target=
DavidSpickett Dec 20, 2024
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13 changes: 9 additions & 4 deletions llvm/docs/MemTagSanitizer.rst
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Expand Up @@ -28,10 +28,15 @@ memory bugs.
Usage
=====

Compile and link your program with ``-fsanitize=memtag`` flag. This
will only work when targeting AArch64 with MemTag extension. One
possible way to achieve that is to add ``-target
aarch64-linux -march=armv8+memtag`` to compilation flags.
Compile and link your program with the ``-fsanitize=memtag`` flag. This
will only work when targeting AArch64 Android with the memory tagging extension.
One possible way to achieve that is to add ``-target
aarch64-linux-android -march=armv8+memtag`` to your compilation flags.

Note that doing this will override existing flags of the same type. Assuming that
you are already targeting AArch64 Android, an alternative is to add
``-Xclang -target-feature -Xclang +mte`` to your compilation flags. This
adds the memory tagging feature, without changing anything else.

Implementation
==============
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