[llvm-branch-commits] [clang] [Clang] Add support for the `-fsanitize=concurrency` runtime (PR #225781)

[Yaxun Liu via llvm-branch-commits]

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@@ -9809,7 +9809,7 @@ void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,
     // Don't forward sanitizer arguments if the toolchain doesn't support it.
     // Without this check using it on the host would result in linker errors.
     if (requiresUBSanRT(ID) && !ToolChainHasRT(TC, "ubsan_minimal") &&
-        !ToolChainHasRT(TC, "ubsan_standalone"))
+        !ToolChainHasRT(TC, "ubsan_standalone") && !ToolChainHasRT(TC, "csan"))
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yxsamliu wrote:

This checks whether any UBSan or CSan runtime exists, not whether the requested runtime exists. For example, UBSan may exist while CSan is missing, but `-fsanitize=concurrency` will still be forwarded. Could we check the sanitizer value and its matching runtime?

https://github.com/llvm/llvm-project/pull/225781