[PATCH] D126077: Fix stack crash in classIsDerivedFrom triggered by clang-tidy

[Anton Fedorov via Phabricator via cfe-commits]

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Protect classIsDerivedFrom from run-out-of-stack crash and infinity loop.

      

Rewrite recursion to loop-over-stack and add checks for complexity to avoid crash on deep definition or infinify recursion.

This fixes https://github.com/llvm/llvm-project/issues/55614


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126077

Files:
  clang-tools-extra/test/clang-tidy/infrastructure/recursive-templates.cpp
  clang/lib/ASTMatchers/ASTMatchFinder.cpp

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