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I would be interested in taking / motivating a deeper dive into the failure modes of -fasychronous-unwind-tables, would you happen to recall a scenario where th
by ShroudedNight 4y ago
I would be interested in taking / motivating a deeper dive into the failure modes of -fasychronous-unwind-tables, would you happen to recall a scenario where the undwinding problems you discuss reproduce ~consistentlyish?
- AshamedCaptain 4y agoasynchronous-unwind-tables is not the default. Ever since I enabled it, I have never seen gdb fail to unwind.
- kouteiheika 4y agoIt was quite a long time ago, so unfortunately at this point I don't remember what exact problems I encountered with `-fasychronous-unwind-tables`. (I think it might have been completely broken and did nothing on 32-bit ARM? But I might be misremembering.) And there's of course the issue that you'd need everything to be compiled with it (because the program you're profiling is going to call into external dynamically linked libraries), which on an average system you most likely won't have.