[compiler-rt] [llvm] [ctxprof] root autodetection mechanism (PR #133147)

[Snehasish Kumar via llvm-commits]

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@@ -53,5 +54,35 @@ class PerThreadCallsiteTrie {
   /// thread, together with the number of samples that included them.
   DenseMap<uptr, uint64_t> determineRoots() const;
 };
+
+class RootAutoDetector final {
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snehasish wrote:

nit: Just RootDetector since there aren't any other types of detectors?

https://github.com/llvm/llvm-project/pull/133147