Try out alternate binary instrumentation tools

[ilmanzo]

https://frida.re/ seems very interesting and flexible, and it's completely free software

the other alternative is https://dynamorio.org/ , but it does have a weird licensing scheme

[ilmanzo]

gave a quick try with frida-trace but it's meant for a slightly different purpose.
You need to pass the function name to trace, and tracing "everything" would severely impact the target's performance.

For each hooked function it generates a javascript "handler", which is not a scalable approach for our scope. We need to go deeper :)

getprotoent_r: Loaded handler at "/home/andrea/__handlers__/libc.so.6/getprotoent_r.js"
__swprintf_chk: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__swprintf_chk.js"
splice: Loaded handler at "/home/andrea/__handlers__/libc.so.6/splice.js"
_IO_proc_close: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_IO_proc_close.js"
iconv_close: Loaded handler at "/home/andrea/__handlers__/libc.so.6/iconv_close.js"
xdr_rejected_reply: Loaded handler at "/home/andrea/__handlers__/libc.so.6/xdr_rejected_reply.js"
__isoc23_vswscanf: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__isoc23_vswscanf.js"
if_indextoname: Loaded handler at "/home/andrea/__handlers__/libc.so.6/if_indextoname.js"
_nss_files_setetherent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_nss_files_setetherent.js"
_mcleanup: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_mcleanup.js"
__internal_setnetgrent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__internal_setnetgrent.js"
munlock: Loaded handler at "/home/andrea/__handlers__/libc.so.6/munlock.js"
open_by_handle_at: Loaded handler at "/home/andrea/__handlers__/libc.so.6/open_by_handle_at.js"
clock_getcpuclockid: Loaded handler at "/home/andrea/__handlers__/libc.so.6/clock_getcpuclockid.js"
__libc_dynarray_emplace_enlarge: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__libc_dynarray_emplace_enlarge.js"
dladdr: Loaded handler at "/home/andrea/__handlers__/libc.so.6/dladdr.js"
__isoc23_scanf: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__isoc23_scanf.js"
__nss_files_data_endent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__nss_files_data_endent.js"
getpmsg: Loaded handler at "/home/andrea/__handlers__/libc.so.6/getpmsg.js"
mbrtoc8: Loaded handler at "/home/andrea/__handlers__/libc.so.6/mbrtoc8.js"
putpmsg: Loaded handler at "/home/andrea/__handlers__/libc.so.6/putpmsg.js"
memcpy: Loaded handler at "/home/andrea/__handlers__/libc.so.6/memcpy.js"
fgetgrent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/fgetgrent.js"
clock_adjtime: Loaded handler at "/home/andrea/__handlers__/libc.so.6/clock_adjtime.js"
svc_register: Loaded handler at "/home/andrea/__handlers__/libc.so.6/svc_register.js"
fcloseall: Loaded handler at "/home/andrea/__handlers__/libc.so.6/fcloseall.js"
__libc_scratch_buffer_grow_preserve: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__libc_scratch_buffer_grow_preserve.js"
_IO_popen: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_IO_popen.js"
__libc_fatal: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__libc_fatal.js"
stdc_bit_ceil_us: Loaded handler at "/home/andrea/__handlers__/libc.so.6/stdc_bit_ceil_us.js"
renameat2: Loaded handler at "/home/andrea/__handlers__/libc.so.6/renameat2.js"
wcscspn: Loaded handler at "/home/andrea/__handlers__/libc.so.6/wcscspn.js"
pthread_mutex_setprioceiling: Loaded handler at "/home/andrea/__handlers__/libc.so.6/pthread_mutex_setprioceiling.js"
iopl: Loaded handler at "/home/andrea/__handlers__/libc.so.6/iopl.js"
__assert: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__assert.js"
getfsent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/getfsent.js"
_pthread_cleanup_push: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_pthread_cleanup_push.js"
__libc_start_main: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__libc_start_main.js"
ether_ntoa: Loaded handler at "/home/andrea/__handlers__/libc.so.6/ether_ntoa.js"
svcudp_create: Loaded handler at "/home/andrea/__handlers__/libc.so.6/svcudp_create.js"
_IO_seekoff: Loaded handler at "/home/andrea/__handlers__/libc.so.6/_IO_seekoff.js"
link: Loaded handler at "/home/andrea/__handlers__/libc.so.6/link.js"
dup: Loaded handler at "/home/andrea/__handlers__/libc.so.6/dup.js"
if_freenameindex: Loaded handler at "/home/andrea/__handlers__/libc.so.6/if_freenameindex.js"
wprintf: Loaded handler at "/home/andrea/__handlers__/libc.so.6/wprintf.js"
lsetxattr: Loaded handler at "/home/andrea/__handlers__/libc.so.6/lsetxattr.js"
fgetspent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/fgetspent.js"
__file_change_detection_for_path: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__file_change_detection_for_path.js"
pthread_cond_clockwait: Loaded handler at "/home/andrea/__handlers__/libc.so.6/pthread_cond_clockwait.js"
qgcvt: Loaded handler at "/home/andrea/__handlers__/libc.so.6/qgcvt.js"
posix_spawnattr_setsigdefault: Loaded handler at "/home/andrea/__handlers__/libc.so.6/posix_spawnattr_setsigdefault.js"
utime: Loaded handler at "/home/andrea/__handlers__/libc.so.6/utime.js"
tmpnam_r: Loaded handler at "/home/andrea/__handlers__/libc.so.6/tmpnam_r.js"
seed48: Loaded handler at "/home/andrea/__handlers__/libc.so.6/seed48.js"
svcraw_create: Loaded handler at "/home/andrea/__handlers__/libc.so.6/svcraw_create.js"
sem_open: Loaded handler at "/home/andrea/__handlers__/libc.so.6/sem_open.js"
sethostent: Loaded handler at "/home/andrea/__handlers__/libc.so.6/sethostent.js"
tcflow: Loaded handler at "/home/andrea/__handlers__/libc.so.6/tcflow.js"
re_set_syntax: Loaded handler at "/home/andrea/__handlers__/libc.so.6/re_set_syntax.js"
pthread_testcancel: Loaded handler at "/home/andrea/__handlers__/libc.so.6/pthread_testcancel.js"
ioctl: Loaded handler at "/home/andrea/__handlers__/libc.so.6/ioctl.js"
xdr_authdes_cred: Loaded handler at "/home/andrea/__handlers__/libc.so.6/xdr_authdes_cred.js"
__nss_files_data_put: Loaded handler at "/home/andrea/__handlers__/libc.so.6/__nss_files_data_put.js"

[ilmanzo]

evaluate the use of OProfile : https://en.wikipedia.org/wiki/OProfile