$ clang -Wall -Os -pipe -g3 frida-gum-example.c -o frida-gum-example -L. -lfrida-gum -lresolv -Wl,-dead_strip -Wl,-no_compact_unwind
$ ./frida-gum-example
[*] open("/etc/hosts")
[*] close(3)
[*] open("/etc/fstab")
[*] close(-1)
[*] listener got 4 calls
[*] listener still has 4 calls