java profiling not resolving user space symbols

[chiranjib-hpe]

Hi,

Trying to integrate java profiling in coroot. I dont see it available yet so started the POC.

Running a java prog (opening and closing file in a loop), perf_event tool and ubuntu bcc (bpfcc) in a same container. Java symbols are generated using perf_event tool and placed at /tmp/perf-${PID}.map file. Now using command /sbin/profile-bpfcc -adf -p $PID 30 while trying to generate the profile data, we can see the kernel space symbols are coming in profile file but all user space symbols are missing
b'__x64_sys_write_[k]' b'do_syscall_64_[k]' b'entry_SYSCALL_64_after_hwframe_[k]' -- [unknown] [unknown] [unknown]
Used different options in the profile-bpfcc command but no luck. Can anybody please help.

[def]

We’ve improved the eBPF-based profiler for Java applications. To take full advantage of it, make sure the JVM is started with the -XX:+PreserveFramePointer option: https://docs.coroot.com/profiling/ebpf-based-profiling#java

[chiranjib-hpe]

From which coroot version this eBPF based java profiler is available.