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Identifying bottom-of-stack


Hello,

In the multi-threaded case, GDB's having fun identifying the outer-most (oldest) frame and, unfortunatly, has this habit of backtracing past it :-/

Does anyone see a problem with:

- GLIBC marking those outermost frames with CFI indicating that both the CFA and the RA are "unknown"?

- GDB's CFI unwinder recognizing this and returning a NULL frame ID (gdb doesn't unwind _past_ such a frame).

I think this would give us a portable way of terminating the stack.

comments?
Andrew


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