hi all,
to demonstrate extending gdb to use etm traces for implementing btrace
on arm processors, I have made this video available on youtube
https://youtu.be/ptKbJRNUqUI
users can then have access to process record and replay, on instructions
and functions level
(https://sourceware.org/gdb/current/onlinedocs/gdb/Process-Record-and-Replay.html)
and reverse
debugging(https://www.gnu.org/software/gdb/news/reversible.html)
we have all functionalities available for intel PT except tracing
multi-threaded applications.
In this demo I have "reconstructed" the cspr register to enable setting
breakpoints in reverse debugging. it is still dirty (adds arm specific
register to an architecture agnostic structure) but it shows that it
works when implemented properly
Kind Regards
Zied Guermazi
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