[llvm] [llvm-symbolizer] Recognize AIX big archive (PR #150401)

[James Henderson via llvm-commits]

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@@ -221,10 +227,30 @@ class LLVMSymbolizer {
   /// Sum of the sizes of the cached binaries.
   size_t CacheSize = 0;
 
-  /// Parsed object file for path/architecture pair, where "path" refers
-  /// to Mach-O universal binary.
-  std::map<std::pair<std::string, std::string>, std::unique_ptr<ObjectFile>>
-      ObjectForUBPathAndArch;
+  struct ArchiveCacheKey {
+    std::string ArchivePath;
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jh7370 wrote:

Nit: references to `Archive` in the names here are misleading, because they might be referring to a Mach-O universal binary, if I'm not mistaken.

https://github.com/llvm/llvm-project/pull/150401