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

[Clement Courbet 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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legrosbuffle wrote:

Any reason not to generate the message when constructing the `SnippetCrash` ? It feels like storing theaddress and signal number is not really useful if they are not accessible (or if they are, they we should have two different errors for `SnippetFailed` and `SnippetCrashed`).

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