memory free on nginx reload

[Donatas Abraitis]

Hello everyone,

I'm trying to change behavior of one of the modules like ModSecurity. It
doesn't free memory after reload, only after restart.

static void ngx_http_modsecurity_terminate(ngx_cycle_t *cycle);

    ngx_http_modsecurity_terminate, /* exit process */
    ngx_http_modsecurity_terminate, /* exit master */

static void ngx_http_modsecurity_terminate(ngx_cycle_t *cycle)
{
    if (modsec_server) {
        modsecTerminate();
        modsec_server = NULL;
    }
}

Backtrace is quite good, but I don't understand why it repeats two times
(it's after nginx's reload):

 0x506060 : ngx_http_modsecurity_terminate+0x0/0x30
[/usr/local/openresty/nginx/sbin/nginx]
 0x4590be : ngx_worker_process_exit+0x2e/0x210
[/usr/local/openresty/nginx/sbin/nginx]
 0x45989a : ngx_cache_manager_process_cycle+0x13a/0x180
[/usr/local/openresty/nginx/sbin/nginx]
 0x457da4 : ngx_spawn_process+0x154/0x4d0
[/usr/local/openresty/nginx/sbin/nginx]
 0x4596fa : ngx_start_cache_manager_processes+0x17a/0x1e0
[/usr/local/openresty/nginx/sbin/nginx]
 0x45a00e : ngx_master_process_cycle+0x2ae/0x990
[/usr/local/openresty/nginx/sbin/nginx]
 0x4388cf : main+0x77f/0xa10 [/usr/local/openresty/nginx/sbin/nginx]
 0x7f30f2f69ec5 : __libc_start_main+0xf5/0x1c0 [/lib/x86_64-linux-gnu/
libc-2.19.so]
 0x43b380 : _start+0x29/0x39 [/usr/local/openresty/nginx/sbin/nginx]
 0x506060 : ngx_http_modsecurity_terminate+0x0/0x30
[/usr/local/openresty/nginx/sbin/nginx]
 0x4590be : ngx_worker_process_exit+0x2e/0x210
[/usr/local/openresty/nginx/sbin/nginx]
 0x4593cb : ngx_worker_process_cycle+0x12b/0x190
[/usr/local/openresty/nginx/sbin/nginx]
 0x457da4 : ngx_spawn_process+0x154/0x4d0
[/usr/local/openresty/nginx/sbin/nginx]
 0x459514 : ngx_start_worker_processes+0x74/0xe0
[/usr/local/openresty/nginx/sbin/nginx]
 0x45a001 : ngx_master_process_cycle+0x2a1/0x990
[/usr/local/openresty/nginx/sbin/nginx]
 0x4388cf : main+0x77f/0xa10 [/usr/local/openresty/nginx/sbin/nginx]
 0x7f30f2f69ec5 : __libc_start_main+0xf5/0x1c0 [/lib/x86_64-linux-gnu/
libc-2.19.so]
 0x43b380 : _start+0x29/0x39 [/usr/local/openresty/nginx/sbin/nginx]

Any help would be appreciated! Or just any hints as well!

-- 
Donatas

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