[all-commits] [llvm/llvm-project] 418e4b: [BOLT] Detect incorrect update of dynamic relocati...

[Maksim Panchenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 418e4b0c4ff2bc22dda318fce0293002a22fa76f
      https://github.com/llvm/llvm-project/commit/418e4b0c4ff2bc22dda318fce0293002a22fa76f
  Author: Maksim Panchenko <maks at fb.com>
  Date:   2024-04-24 (Wed, 24 Apr 2024)

  Changed paths:
    M bolt/lib/Rewrite/RewriteInstance.cpp
    A bolt/test/X86/indirect-goto-pie.test
    M bolt/test/X86/shrinkwrapping-do-not-pessimize.s
    R bolt/test/runtime/X86/Inputs/indirect_goto.c
    R bolt/test/runtime/X86/indirect-goto-pie.test

  Log Message:
  -----------
  [BOLT] Detect incorrect update of dynamic relocations (#89681)

When we rewrite dynamic relocations, there could be cases where they
reference code locations inside functions that were rewritten. When this
happens, we need to precisely map old address to a new one. Until we can
reliably perform the mapping, detect such condition and issue an error
refusing to write a broken binary.



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