[clang][BPF] Turn on AddressSanitizer pass

[etsal]

The BPF LLVM target currently doesn't support turning on the AddressSanitizer pass, either for userspace ASAN or KASAN. Enable the KASAN option for the BPF target in anticipation of a KASAN implementation for BPF.

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@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-driver

Author: Emil Tsalapatis (etsal)

Changes

The BPF LLVM target currently doesn't support turning on the AddressSanitizer pass, either for userspace ASAN or KASAN. Enable the KASAN option for the BPF target in anticipation of a KASAN implementation for BPF.

---

Full diff: https://github.com/llvm/llvm-project/pull/167766.diff

1 Files Affected:

• (modified) clang/lib/Driver/ToolChain.cpp (+2)

diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index eea5c2f7f4a6a..db23b96686e1e 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -1636,6 +1636,8 @@ SanitizerMask ToolChain::getSupportedSanitizers() const {
     Res |= SanitizerKind::ShadowCallStack;
   if (getTriple().isAArch64(64))
     Res |= SanitizerKind::MemTag;
+  if (getTriple().isBPF())
+    Res |= SanitizerKind::KernelAddress;
   return Res;
 }
 

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