[llvm] [llvm-exegesis] Use explicit error classes for different snippet crashes (PR #74210)

[Clement Courbet via llvm-commits]

================
@@ -141,17 +141,10 @@ class InProcessFunctionExecutorImpl : public BenchmarkRunner::FunctionExecutor {
       CrashRecoveryContext::Disable();
       PS.reset();
       if (Crashed) {
-        std::string Msg = "snippet crashed while running";
-#ifdef LLVM_ON_UNIX
         // See "Exit Status for Commands":
         // https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xcu_chap02.html
         constexpr const int kSigOffset = 128;
-        if (const char *const SigName = strsignal(CRC.RetCode - kSigOffset)) {
-          Msg += ": ";
-          Msg += SigName;
-        }
-#endif
-        return make_error<SnippetCrash>(std::move(Msg));
+        return make_error<SnippetSignal>(CRC.RetCode - kSigOffset);
----------------
legrosbuffle wrote:

Is the signal meaningful on windows ?

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