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Add documentation for LLVM KCFI support #1529

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Dec 14, 2022
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Add documentation for LLVM KCFI support #1529

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11 changes: 8 additions & 3 deletions src/sanitizers.md
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Expand Up @@ -9,16 +9,19 @@ The rustc compiler contains support for following sanitizers:
forward-edge control flow protection.
* [Hardware-assisted AddressSanitizer][clang-hwasan] a tool similar to
AddressSanitizer but based on partial hardware assistance.
* [KernelControlFlowIntegrity][clang-kcfi] LLVM Kernel Control Flow Integrity
(KCFI) provides forward-edge control flow protection for operating systems
kernels.
* [LeakSanitizer][clang-lsan] a run-time memory leak detector.
* [MemorySanitizer][clang-msan] a detector of uninitialized reads.
* [ThreadSanitizer][clang-tsan] a fast data race detector.

## How to use the sanitizers?

To enable a sanitizer compile with `-Z sanitizer=...` option, where value is one
of `address`, `cfi`, `hwaddress`, `leak`, `memory` or `thread`. For more details
on how to use sanitizers please refer to the sanitizer flag in [the unstable
book](https://doc.rust-lang.org/unstable-book/).
of `address`, `cfi`, `hwaddress`, `kcfi`, `leak`, `memory` or `thread`. For more
details on how to use sanitizers please refer to the sanitizer flag in [the
unstable book](https://doc.rust-lang.org/unstable-book/).

## How are sanitizers implemented in rustc?

Expand Down Expand Up @@ -109,13 +112,15 @@ To enable a sanitizer on a new target which is already supported by LLVM:
* [AddressSanitizer in Clang][clang-asan]
* [ControlFlowIntegrity in Clang][clang-cfi]
* [Hardware-assisted AddressSanitizer][clang-hwasan]
* [KernelControlFlowIntegrity in Clang][clang-kcfi]
* [LeakSanitizer in Clang][clang-lsan]
* [MemorySanitizer in Clang][clang-msan]
* [ThreadSanitizer in Clang][clang-tsan]

[clang-asan]: https://clang.llvm.org/docs/AddressSanitizer.html
[clang-cfi]: https://clang.llvm.org/docs/ControlFlowIntegrity.html
[clang-hwasan]: https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html
[clang-kcfi]: https://clang.llvm.org/docs/ControlFlowIntegrity.html#fsanitize-kcfi
[clang-lsan]: https://clang.llvm.org/docs/LeakSanitizer.html
[clang-msan]: https://clang.llvm.org/docs/MemorySanitizer.html
[clang-tsan]: https://clang.llvm.org/docs/ThreadSanitizer.html