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

[Yaxun Liu via llvm-branch-commits]

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+# ConcurrencySanitizer
+
+## Introduction
+
+ConcurrencySanitizer (CSan) is a data race detector for CPU and GPU programs.
+It consists of an LLVM instrumentation pass and run-time libraries in
+compiler-rt.
+
+Unlike ThreadSanitizer, CSan does not maintain a happens-before model or shadow
+state for every memory location. Memory accesses are sampled at random and
+stalled to detect unordered accesses. Importantly, this method has **no false
+positives** and **fixed memory overhead.** However, the probabalistic nature
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yxsamliu wrote:

Small typo: `probabalistic` should be `probabilistic`.

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