I am looking for a bpftrace example for the reader pattern in go - a function that takes a buffer as input, fills that buffer and returns the written bytes and a potential error.
Something like:
# bpftrace -p <pid> -e 'uprobe:main:crypto/tls.Conn.Read { $ptr = arg0 }, uretprobe:main:crypto/tls.Conn.Read { printf("%s", str($ptr, retval0)) }'
Found this project which solves the problem using bcc. Also stumbled across the discussions around ebpf and dynamic stacks in golang on github/golang and on github/iovisor. This does not answer the question (in the context of bpftrace) but it seems that there is a bigger problem which needs to be fixed before further investigating on this.