[llvm] Debuginfod failed-server cache (PR #74757)

[Kevin Frei via llvm-commits]

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@@ -194,6 +194,26 @@ Error StreamedHTTPResponseHandler::handleBodyChunk(StringRef BodyChunk) {
   return Error::success();
 }
 
+// Create a file cache entry to remember if a given server failed
+Expected<AddStreamFn> CheckServerFailure(FileCache &Cache, uint &Task,
+                                         StringRef ServerUrl) {
+  SmallString<96> CachedServerFailurePath(ServerUrl);
+  llvm::transform(CachedServerFailurePath, CachedServerFailurePath.begin(),
+                  [&](char c) { return std::isalnum(c) ? c : '_'; });
+  CachedServerFailurePath.append(".failed");
+  return Cache(Task, CachedServerFailurePath, "");
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kevinfrei wrote:

I'll move ahead with configuring the timeouts to use more appropriate defaults, while also exposing them as LLDB options. I'd like to see the user experience after fixing those to see if it's still as bad as I'm worried it will be :/ 

https://github.com/llvm/llvm-project/pull/74757