Re: Segfault using fastcgi application

Vishal Singh wrote:

>Hello,
>
>I am using fastcgi and it starts my application when the server is started.
>
>The problem I am facing is :
>
>When I run the application standalone it works perfectly all right.
>When the application is started by fastcgi, it gets killed returning
>Internal server error to the browser.
>
>I tried to do gdb for the launched process, which gives the following.
>
>  
>

show the code, where you have this getenv.. maybe you pass pointer that 
points to bad address? uninitialized or smtn.

>Program received signal SIGSEGV, Segmentation fault.
>[Switching to Thread 24423344 (LWP 9587)]
>0x004ffcca in getenv () from /lib/tls/libc.so.6
>(gdb) bt
>#0  0x004ffcca in getenv () from /lib/tls/libc.so.6
>#1  0x005abcaa in __res_vinit () from /lib/tls/libc.so.6
>#2  0x005ade56 in __res_maybe_init () from /lib/tls/libc.so.6
>#3  0x00974c8b in res_search () from /lib/libresolv.so.2
>#4  0x081061f2 in server_hosts (domain=0x9ff78b0 "seoul.clic.cs.columbia.edu",
>    service=0x8131fd9 "sip", type=0, port=-5060, entries=0x174a178)
>    at ../libcine/servers.c:303
>#5  0x08106841 in servers (domain=0x9ff78b0 "seoul.clic.cs.columbia.edu",
>    service=0x8131fd9 "sip", type=0, port=-5060) at ../libcine/servers.c:414
>#6  0x080b4ba4 in ClientGetLocations (uri=0x174a350, type=0)
>    at ../libsip/client.c:2657
>#7  0x080b1a5f in DoLocationLookup (info=0x9ff7b3c) at ../libsip/client.c:1096
>#8  0x080b0fd6 in InitialClientStart (rs=0x9ff47d8) at ../libsip/client.c:799
>#9  0x0810f2b2 in reactive_system_event (rs=0x9ff47d8)
>    at ../libcine/reactivesystem.c:732
>#10 0x0810c262 in pool_routine (arg=0x9feafe8) at ../libcine/thread_pool.c:526
>#11 0x008a9371 in start_thread () from /lib/tls/libpthread.so.0
>#12 0x0059d9be in clone () from /lib/tls/libc.so.6
>  
>

also, using threads with fastcgi is somewhat dangerous (pthread).
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