[all-commits] [llvm/llvm-project] 2f7a0d: [lldb][test] Fix TestMinidumpSizeOfImage.py with g...

[David Spickett via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2f7a0da7ba3d1de5311118d60e685432238d4e72
      https://github.com/llvm/llvm-project/commit/2f7a0da7ba3d1de5311118d60e685432238d4e72
  Author: David Spickett <david.spickett at arm.com>
  Date:   2026-07-30 (Thu, 30 Jul 2026)

  Changed paths:
    M lldb/test/API/functionalities/process_save_core_minidump_size_of_image/TestMinidumpSizeOfImage.py

  Log Message:
  -----------
  [lldb][test] Fix TestMinidumpSizeOfImage.py with glibc >= 2.41 (#212972)

Test added by #188363.

In glibc 2.41:
> * dlopen and dlmopen no longer make the stack executable if a shared
> library requires it, either implicitly because of a missing GNU_STACK
> ELF header (and default ABI permission having the executable bit set)
>   or explicitly because of the executable bit in GNU_STACK, and the
>   stack is not already executable.  Instead, loading such objects will
>   fail.

https://lists.gnu.org/archive/html/info-gnu/2025-01/msg00014.html

The test program used for this test provides all the PHDRS itself, but
did not include a PT_GNU_STACK entry.

So the loader would assume it wanted exectuable stack. The main program
was not using an executable stack and so the loader refused to change
that, so loading the object fails.

dlopen failed:
lldb-test-build/functionalities/process_save_core_minidump_size_of_image/TestMinidumpSizeOfImage/libtestlib.so:
cannot enable executable stack as shared object requires: Invalid
argument

To fix this provide a PT_GNU_STACK with value 6 aka read and write but
not execute.



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