Correct using valgrind, but fail to display in browser

[longgood]

I am new to PHP-CPP, and find it is perfect fitting my cloud computing need.
After following the guidance from website(http://www.php-cpp.com/documentation)
I am successfully build my .so file, setting php.ini file, and tracing result correctly display using valgrind. but when it run in browser, it fails. Not sure what is the root cause, if I can get some advise here, it is much appreciated.

Here comes my spec, and environment info.
OS:Ubuntu 18.04 X86_64
g++, version 7.5.0
php 7.2.24

Regards,