function print_regs () %{
	if (CONTEXT->regs) {
		_stp_print_regs (CONTEXT->regs);
	}
%}

function print_backtrace () %{
	if (CONTEXT->regs) {
		_stp_stack_print(CONTEXT->regs);
	}
%}

function backtrace () %{
	if (CONTEXT->regs) {
		String str = _stp_string_init (0);
		_stp_stack_sprint (str, CONTEXT->regs, 0);	
		strlcpy (THIS->__retvalue, _stp_string_ptr(str), MAXSTRINGLEN);
	} else 
		strlcpy (THIS->__retvalue, "", MAXSTRINGLEN);
%}

function execname:string () %{
	if (unlikely(in_interrupt()))
		strlcpy (THIS->__retvalue, "<unknown>", MAXSTRINGLEN);
	else
		strlcpy (THIS->__retvalue, current->comm, MAXSTRINGLEN);
%}

function pid:long () %{
	if (unlikely(in_interrupt()))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->pid;		
%}

function ppid:long () %{
	if (unlikely(in_interrupt() || !current->parent))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->parent->pid;		
%}

function pexecname:string () %{
	if(unlikely(in_interrupt() || !current->parent || !current->parent->comm))
		strlcpy (THIS->__retvalue, "<unknown>", MAXSTRINGLEN);
	else
		strlcpy (THIS->__retvalue, current->parent->comm, MAXSTRINGLEN);
%}

function gid:long () %{
	if(unlikely(in_interrupt()))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->gid;		
%}

function egid:long () %{
	if(unlikely(in_interrupt()))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->egid;		
%}

function uid:long () %{
	if(unlikely(in_interrupt()))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->uid;		
%}

function euid:long () %{
	if(unlikely(in_interrupt()))
		THIS->__retvalue = 0;
	else
		THIS->__retvalue = current->euid;		
%}


function print_stack(stk:string) %{
	char *ptr = THIS->stk;
	char *tok = strsep(&ptr, " ");
	_stp_printf ("trace for %d (%s)\n", current->pid, current->comm);
	while (tok && *tok) {
		_stp_print_cstr(" ");
		_stp_symbol_print (simple_strtol(tok, NULL, 16));
		_stp_print_cstr("\n");
		tok = strsep(&ptr, " ");
	}
%}