Comments (3)
bpf_printk is a wrapper around bpf helper bpf_trace_printk
.
The behavior and supported specifiers of bpf_trace_printk
are well documented.
You can print return value of bpf_printk to debug the problem.
from libbpf-bootstrap.
Change:
bpf_printk("KPROBE netlink_unicast pid = %d, portid=%08x\n", pid, portid);
to:
bpf_printk("KPROBE netlink_unicast pid = %d, portid=%x\n", pid, portid);
Currently, only a small subset of format specifiers are supported by BPF.
from libbpf-bootstrap.
Awesome, that fixed it. Thanks! Given that there was no error while running the "broken" code, should I file another issue? Or was there some diagnostic output I overlooked?
from libbpf-bootstrap.
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from libbpf-bootstrap.