[Bug runtime/16836] CFI expression underflow occurs during unwinding on some kernels
barrdetwix at gmail dot com
sourceware-bugzilla@sourceware.org
Tue Oct 6 01:42:48 GMT 2020
https://sourceware.org/bugzilla/show_bug.cgi?id=16836
--- Comment #4 from barrdetwix at gmail dot com ---
Here's 200kB of log with -DDEBUG_UNWIND=2 leading up to the "DWARF expression
stack underflow in CFI": https://paste.mozilla.org/VewSs2i7#L8,258,3146
(Note that there's a couple non-stap lines in the long becase I'm not running
stap directly, my reproducer is a small tool that starts a target process
suspended, generates a stap script for that process, and captures stap output.
And so far the CFI underflow problem reproduces perfectly only when I run my
tool under itself.)
Happy to upload vmlinux or some other binary if that would help any.
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