Commits on Apr 19, 2024

1. Check for null oso SymbolFile in SymbolFileDwarfDebugMap::ResolveSymb… …

   …olContext (llvm#89324)
   
   The couple other places that use the oso module's SymbolFile, they check
   that it's non-null, so this is just an oversight in
   ResolveSymbolContext.
   
   I didn't add a test for this (but did add a log message for the error
   case) because I can't see how this would actually happen. The .o file
   had to have valid enough DWARF that the linker's parser could handle it
   or it would not be in the debug map. If you delete the .o file, we just
   leave that entry out of the debug map. If you strip it or otherwise mess
   with it, we'll notice the changed mod time and refuse to read it...
   
   This was based on a report from the field, and we don't have access to
   the project. But if the logging tells me how this happened I can come
   back and add a test with that example.
   
   (cherry picked from commit 6b38936)

   

   jimingham committed Apr 19, 2024
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