[Bug gdb/23342] sanity check stale struct frame_info *

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=23342

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
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                 CC|                            |simark at simark dot ca

--- Comment #4 from Simon Marchi <simark at simark dot ca> ---
Just wondering, what mechanism do you intend to use to know whether a
frame_info pointer is still valid?  We have a frame cache generation counter
nowadays, so maybe that could be used for a quick check.

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