libcopperplate.so depends on modecheck?

Lange Norbert norbert.lange at andritz.com
Wed Mar 20 11:50:15 CET 2019


Hello,

Seems like libcopperplate.so always depends on libmodechk.so, as the following symbols would imply:

nm -D /home/lano/buildroot/host/x86_64-buildroot-linux-gnu/sysroot/usr/xenomai/lib/libcopperplate.so | grep __real
                 U __real_free
                 U __real_malloc

xeno-config deals with this by always linking modeck, even if you add --no-mode-check-

I am not completely confident with the wrapper-magic,
but shouldn't libcopperplate use either cobalt_malloc or the libc malloc?
__real_malloc is just a stub for libc malloc, so I really don't get the point (assuming this is intentional).

Modeswitches could also be detected by interposing libraries, so removing libmodechk
Is a viable thing to do.
(shameless plug: https://github.com/nolange/preload_checkers )


Regards, Norbert
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