[GitHub] [skywalking-rover] jelipo commented on pull request #87: replace the way to get tgid and pid

["jelipo (via GitHub)" <gi...@apache.org>]

jelipo commented on PR #87:
URL: https://github.com/apache/skywalking-rover/pull/87#issuecomment-1494703190

   This "_" macro uses the `bpf_probe_read` function to read memory, and the `bpf_probe_read` function will have additional bounds checks and memory copying.
   https://github.com/apache/skywalking-rover/blob/main/bpf/include/api.h#L37
   
   `bpf_get_current_pid_tgid` is a function specially used to obtain tgid and pid in the ebpf program, and has less performance loss.
   https://elixir.bootlin.com/linux/latest/source/kernel/bpf/helpers.c#L216


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