Segfault with c_glib client

[Niclas Lockner]

Hi,

I have some problems getting my c_glib client to work and I'm hoping
someone here can help.
I have attached both my client and my interface file. I'm using the master
branch of thrift, but I got the same error when I tried the 0.9.0 version
also.

So, the problem I'm having is that I get a segmentation fault when I try to
send my thrift struct to the server.
>From GDB:
user_storage_client_send_store (iface=0x6102c0, user=0x7fffffffe020,
    error=0x7fffffffe060) at user_storage.c:119
119    xfer += ret;
(gdb) n
120    if ((ret = thrift_struct_write (THRIFT_STRUCT (user), protocol,
error)) < 0)
(gdb) s
thrift_struct_get_type () at src/thrift/c_glib/thrift_struct.c:23
23 G_DEFINE_ABSTRACT_TYPE(ThriftStruct, thrift_struct, G_TYPE_OBJECT)
(gdb) n

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7992dec in g_type_check_instance_cast ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0


And the stack trace:

#0  0x00007f72baae0dec in g_type_check_instance_cast () from
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#1  0x0000000000402709 in user_storage_client_send_store (iface=0x14702c0,
user=0x7fff23617580, error=0x7fff236175c0)
    at user_storage.c:120
#2  0x0000000000402cb4 in user_storage_client_store (iface=0x14702c0,
user=0x7fff23617580, error=0x7fff236175c0)
    at user_storage.c:259
#3  0x0000000000401b7d in main (argc=1, argv=0x7fff236176e8) at client.c:52



Should the variable be initialized in some way before I can use it? Or am I
doing something else wrong?

Thanks in advance.
Niclas Lockner

#include <stdio.h>

#include "thrift/c_glib/protocol/thrift_protocol.h"
#include "thrift/c_glib/protocol/thrift_binary_protocol.h"
#include "thrift/c_glib/transport/thrift_buffered_transport.h"
#include "thrift/c_glib/transport/thrift_transport.h"
#include "thrift/c_glib/transport/thrift_socket.h"

#include "test_types.h"
#include "user_storage.h"

int main(int argc, char** argv) {
	ThriftSocket *tsocket;
	ThriftTransport *transport;
	ThriftProtocol *protocol;
	UserStorageClient *client;
	UserStorageIf *service;
	GError *err = NULL;
	UserProfile user;


	g_type_init();

	tsocket = THRIFT_SOCKET( g_object_new (THRIFT_TYPE_SOCKET,
			"hostname", "localhost",
			"port", 9090, 0) );
	transport = THRIFT_TRANSPORT( g_object_new (THRIFT_TYPE_BUFFERED_TRANSPORT,
			"transport", tsocket, 0) );
	protocol =  THRIFT_PROTOCOL ( g_object_new (THRIFT_TYPE_BINARY_PROTOCOL,
			"transport", transport, 0) );
	client =    USER_STORAGE_CLIENT( g_object_new(TYPE_USER_STORAGE_CLIENT,
			"input_protocol", protocol, /* ??? */
			"output_protocol", protocol,
			0) );
	service = USER_STORAGE_IF(client);

	if (
		!thrift_transport_open(transport, 0) ||
		!thrift_transport_is_open(transport)
	) {
		printf("Could not connect to server\n");
		return 1;
	}

	user.uid = 0;
	user.name = g_strdup_printf("name");
	user.blurb = g_strdup_printf("blurb");
	user.__isset_uid = TRUE;
	user.__isset_name = TRUE;
	user.__isset_blurb = TRUE;
	
	if (!user_storage_client_store(service, &user, &err)) {
		printf("Could not exec store: %s\n", err->message);
		return 1;
	}

	g_free(user.name);
	g_free(user.blurb);

	thrift_transport_close(transport, 0);

	g_object_unref (client);
	g_object_unref (protocol);
	g_object_unref (transport);
	g_object_unref (tsocket);

	return 0;
}