Hi. I trying to make shared/static library and use it in C project (php extencion). `kotlinc -opt ./...

# kotlin-native

[rjhdby]

Hi. I trying to make shared/static library and use it in C project (php extencion).
kotlinc -opt ./hellokt.kt -o hellokt -produce dynamic
kotlinc -opt ./hellokt.kt -o hellokt -produce static

With shared library all working, but with static library I receive segfault.

Why it can be? Mabe I need to provide some specific keys to c compiler?

[olonho]

could you please provide stacktrace of crash from debugger?

[rjhdby]

(gdb) run -dextension=./modules/hello.so -r "echo hello('JoE');"
Starting program: /opt/rh/rh-php71/root/usr/bin/php -dextension=./modules/hello.so -r "echo hello('JoE');"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib64/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00005555557b0682 in zend_register_functions ()
(gdb) bt
#0  0x00005555557b0682 in zend_register_functions ()
#1  0x00005555557b16b7 in zend_register_module_ex ()
#2  0x00005555556ecc36 in php_load_extension ()
#3  0x000055555579dace in zend_llist_apply ()
#4  0x000055555574f59a in php_ini_register_extensions ()
#5  0x0000555555747da9 in php_module_startup ()
#6  0x000055555584796d in php_cli_startup ()
#7  0x0000555555624838 in main ()

Library loaded on step php_load_extension and registered as module on step zend_register_module_ex.

Also, if I do not use any library function inside c code, then no crash occured

[rjhdby]

If I use -p dynamic (libhellokt.so) - extension work normally

[rjhdby]

More description (in russian) here
https://ru.stackoverflow.com/questions/849255/segfault-%D0%BF%D1%80%D0%B8-%D0%B8%D1%81%D0%BF%D0%BE%D0%BB%D1%8C%D0%B7%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B8-%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%B9-%D0%B1%D0%B8%D0%B1%D0%BB%D0%B8%D0%BE%D1%82%D0%B5%D0%BA%D0%B8

[olonho]

Could you try to add initRuntimeIfNeeded call before calling Kotlin functionality, i.e. just before println?

[rjhdby]

No effect

fun kt_print(string: String) {
    konan.initRuntimeIfNeeded()
    println("Hello, $string!!!")
}

[rjhdby]

full code, if needed
https://github.com/rjhdby/kotlin-native-php-extension

[rjhdby]

Solved.
I know how, but don't understand why. If interesting I can write later, after some research