You can investigate a core dump file using gdb or an IDE to review the call stack and variables (extra useful if compiled with -g and -O0). You may need to enable core dumping like so:
http://www.idimmu.net/2013/06/21/enable-linux-core-dump/ http://www.akadia.com/services/ora_enable_core.html By the way, if you get a segfault on the uci_lookup_ptr() line, you probably have pkg==NULL, as returned by uci_load(). On Tue, Feb 16, 2016 at 7:12 PM, Farid Farid <farid21...@yahoo.com> wrote: > Hi All, > > I am getting seg fault sometimes on the uci_lookup_ptr() call. here is the > way I call this function: > It happens I would say once every couple of hundred calls. > I appreciate if someone can help and guide me how to debug this issue. > I have tried it with uci package from 2016-02-02 > > char * > get_uci_option_api (char* file_name , char* section_name , char* > section_value , char* option_name) > { > struct uci_element *e; > struct uci_section *s = NULL; > struct uci_package *pkg; > struct uci_context *m_uci; > struct uci_ptr ptr; > > m_uci = uci_alloc_context(); > if (!m_uci) > return NULL; > > uci_load ( m_uci , file_name , &pkg); > memset(&ptr,0,sizeof(struct uci_ptr)); > > ptr.option = NULL; > ptr.section = section_value; > ptr.package = file_name; > ptr.value = section_name; > if (!uci_lookup_ptr(pkg->ctx, &ptr , NULL , true)) > { > s = ptr.s; > } > else > s = NULL; > > if (!s) > return NULL; > > uci_foreach_element (&s->options, e) > { > if (!strcmp (e->name, option_name)) > { > struct uci_option *o = uci_to_option (e); > if (o->type == UCI_TYPE_STRING) > return o->v.string; > } > return NULL; > } > > Thanks, > Farid > > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel > _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
