[llvm] [llvm-exegesis] Add explicit error message with segfault address (PR #74210)

[Aiden Grossman via llvm-commits]

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@@ -41,14 +43,19 @@ class ClusteringError : public ErrorInfo<ClusteringError> {
 class SnippetCrash : public ErrorInfo<SnippetCrash> {
 public:
   static char ID;
-  SnippetCrash(const Twine &S) : Msg(S.str()) {}
+  SnippetCrash(const Twine &S)
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boomanaiden154 wrote:

I'm intending to use this in Gematria (https://github.com/google/gematria) and I need to have access to the segfault address there. I sent a patch separating the errors out in https://reviews.llvm.org/D158052, but the suggestion there was to reuse `SnippetCrash`. I can refactor to `SnippetFailed` and `SnippetCrashed` (maybe with different names to make the distinction more noticeable) if desired though.

https://github.com/llvm/llvm-project/pull/74210