DaCapo Callbacks and probes

Build

make

Test

make test

UDST Probe

perf

sudo perf buildid-cache -u ./out/libusdt_probe.so
sudo perf probe -f --add sdt_DaCapo:begin sdt_DaCapo:end
sudo LD_LIBRARY_PATH=$(PWD)/out perf record -e sdt_DaCapo:begin -e sdt_DaCapo:end -- java ...

To use this without sudo, various permissions under /sys/kernel/tracing need to be correct, which might require >= 6.10 kernel with a correct remount setting.

bpftrace

sudo bpftrace -l "usdt:./out/libusdt_probe.so:*"