gursoz

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Hi:

I'm using the getaddrinfo call and getting a SIGSEGV. The code snippet is below.
===============
struct addrinfo hints;
struct addrinfo *result = 0;
int s;
memset(&hints,0,sizeof(struct addrinfo));
hints.ai_family = PF_UNSPEC;
if((s=getaddrinfo("server_2",NULL,&hints,&result))!=0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
}
===============

The stack trace is
===============
(gdb)
89 if((s=getaddrinfo("server_2",NULL,&hints,&result))!=0) {
(gdb) n

Program received signal SIGSEGV, Segmentation fault.
0x0089abd4 in __res_vinit () from /lib/tls/i686/libc.so.6
(gdb) bt
#0 0x0089abd4 in __res_vinit () from /lib/tls/i686/libc.so.6
#1 0x0089b66e in __res_ninit () from /lib/tls/i686/libc.so.6
#2 0x0089caac in __res_maybe_init () from /lib/tls/i686/libc.so.6
#3 0x008789ea in gaih_inet () from /lib/tls/i686/libc.so.6
#4 0x008798d8 in getaddrinfo () from /lib/tls/i686/libc.so.6
#5 0x08333c1b in CicAgent::init (this=0x969e1e8) at ../src/reliability/linux/cic_agent.cxx:89
#6 0x0831e9d2 in CicDObj:rocessConfigRequest (this=0x969dac8, pRec=0x969e360)
at ../src/reliability/common/cic_dobj.cxx:129
#7 0x0831e884 in CicDObj:rocess (this=0x969dac8, pRec=0x969e360)
at ../src/reliability/common/cic_dobj.cxx:101
#8 0x0831ed87 in executeRequest (pObject=0x969dac8, pArg=0x969e360)
at ../src/reliability/common/cic_dobj.cxx:200
#9 0x081de851 in CLWorkerThread::run (this=0x969dff0)
at ../src/framework/cl_worker_thread.cxx:83
#10 0x080d0ef4 in thread_start (arg=0x969dff0) at ../src/linux/cl_basic_thread.cxx:116
#11 0x00b2b080 in start_thread () from /lib/tls/i686/libpthread.so.0
#12 0x0088e23e in clone () from /lib/tls/i686/libc.so.6
(gdb)
===============

My kernel is redhat enterprise "Linux 2.6.9-42.5610".
I am using gcc version 3.4.4 20050721 (Red Hat 3.4.4-2)

Is there any known issue with this call with the above combination of Linux kernel and gcc library?

Thanks,

Amit.

pinniped

Your 'hints' is invalid; use NULL instead.

gursoz

I figured out the problem. My stack size was too small - 16K. After increasing it to 32K the problem was resolved.

krizzz

Hi,

I'm experiencing similar problem, can you tell me how to increase the stack size?

Best,
Chris

gursoz

Something like below for posix thread.
===============================
pthread_attr_t attr;

void *start(void *threadid)
{
//do something
}

int main(int argc, char *argv[])
{
pthread_t thread;
size_t stacksize;
int rc, thread_id=1;

pthread_attr_init(&attr);
pthread_attr_getstacksize (&attr, &stacksize);
stacksize = <some value>;
pthread_attr_setstacksize (&attr, stacksize);
rc = pthread_create(&thread, &attr, start, (void *)thread_id);

pthread_exit(NULL);
}

===============================