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// context tapset
// Copyright (C) 2005, 2006, 2007 Red Hat Inc.
// Copyright (C) 2006 Intel Corporation.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
function print_regs () %{
if (CONTEXT->regs) {
_stp_print_regs (CONTEXT->regs);
}
%}
function print_backtrace () %{
if (CONTEXT->regs) {
_stp_stack_print(CONTEXT->regs, 1, CONTEXT->pi);
} else {
_stp_printf("Systemtap probe: %s\n", CONTEXT->probe_point);
}
%}
function backtrace:string () %{ /* pure */
if (CONTEXT->regs)
_stp_stack_snprint (THIS->__retvalue, MAXSTRINGLEN, CONTEXT->regs, 0, CONTEXT->pi);
else
strlcpy (THIS->__retvalue, "", MAXSTRINGLEN);
%}
function execname:string () %{ /* pure */
strlcpy (THIS->__retvalue, current->comm, MAXSTRINGLEN);
%}
function pid:long () %{ /* pure */
THIS->__retvalue = current->tgid;
%}
function tid:long () %{ /* pure */
THIS->__retvalue = current->pid;
%}
function ppid:long () %{ /* pure */
THIS->__retvalue = current->parent->tgid;
%}
function pexecname:string () %{ /* pure */
strlcpy (THIS->__retvalue, current->parent->comm, MAXSTRINGLEN);
%}
function gid:long () %{ /* pure */
THIS->__retvalue = current->gid;
%}
function egid:long () %{ /* pure */
THIS->__retvalue = current->egid;
%}
function uid:long () %{ /* pure */
THIS->__retvalue = current->uid;
%}
function euid:long () %{ /* pure */
THIS->__retvalue = current->euid;
%}
function cpuid:long () %{ /* pure */
THIS->__retvalue = smp_processor_id();
%}
function cpu:long () %{ /* pure */
THIS->__retvalue = smp_processor_id();
%}
function print_stack(stk:string) %{
char *ptr = THIS->stk;
char *tok = strsep(&ptr, " ");
while (tok && *tok) {
_stp_print_char(' ');
_stp_symbol_print (simple_strtol(tok, NULL, 16));
_stp_print_char('\n');
tok = strsep(&ptr, " ");
}
%}
function pp:string () %{ /* pure */
strlcpy (THIS->__retvalue, CONTEXT->probe_point, MAXSTRINGLEN);
%}
function probefunc:string () %{ /* pure */
char *ptr, *start;
start = strstr(CONTEXT->probe_point, "function(\"");
ptr = start + 10;
if (!start) {
start = strstr(CONTEXT->probe_point, "inline(\"");
ptr = start + 8;
}
if (start) {
int len = MAXSTRINGLEN;
char *dst = THIS->__retvalue;
while (*ptr != '@' && --len > 0 && *ptr)
*dst++ = *ptr++;
*dst = 0;
} else if (CONTEXT->regs &&
#if defined (__ia64__)
((unsigned long)REG_IP(CONTEXT->regs) >= (unsigned long)KERNEL_START)) {
#else
((unsigned long)REG_IP(CONTEXT->regs) >= (unsigned long)PAGE_OFFSET)) {
#endif
_stp_symbol_snprint(THIS->__retvalue, MAXSTRINGLEN, REG_IP(CONTEXT->regs));
if (THIS->__retvalue[0] == '.') /* powerpc symbol has a dot*/
strlcpy(THIS->__retvalue,THIS->__retvalue + 1,MAXSTRINGLEN);
} else {
THIS->__retvalue[0] = '\0';
}
%}
function probemod:string () %{ /* pure */
char *ptr, *start;
start = strstr(CONTEXT->probe_point, "module(\"");
ptr = start + 8;
if (start) {
int len = MAXSTRINGLEN;
char *dst = THIS->__retvalue;
while (*ptr != '"' && --len && *ptr)
*dst++ = *ptr++;
*dst = 0;
} else {
/* XXX: need a PC- and symbol-table-based fallback. */
THIS->__retvalue[0] = '\0';
}
%}
function is_return:long () %{ /* pure */
if (CONTEXT->pi)
THIS->__retvalue = 1;
else
THIS->__retvalue = 0;
%}
function target:long () %{ /* pure */
THIS->__retvalue = _stp_target;
%}
function module_name:string () %{ /* pure */
strlcpy(THIS->__retvalue, THIS_MODULE->name, MAXSTRINGLEN);
%}
function stp_pid:long () %{ /* pure */
THIS->__retvalue = _stp_pid;
%}
# return the size of the stack
function stack_size:long () %{ /* pure */
THIS->__retvalue = THREAD_SIZE;
%}
# return how many bytes are currently used in the stack
function stack_used:long () %{ /* pure */
char a;
THIS->__retvalue = THREAD_SIZE - ((long)&a & (THREAD_SIZE-1));
%}
# return how many bytes are currently unused in the stack
function stack_unused:long () %{ /* pure */
char a;
THIS->__retvalue = (long)&a & (THREAD_SIZE-1);
%}
# Return the address of the calling function. Works only for
# return probes at this time.
function caller_addr:long () %{ /* pure */
if (CONTEXT->pi)
THIS->__retvalue = (int64_t)(long)_stp_ret_addr_r(CONTEXT->pi);
else
THIS->__retvalue = 0;
%}
# Return the address and name of the calling function. Works
# only for return probes at this time.
function caller:string() %{ /* pure */
if (CONTEXT->pi)
_stp_symbol_snprint( THIS->__retvalue, MAXSTRINGLEN,
(unsigned long)_stp_ret_addr_r(CONTEXT->pi));
else
strlcpy(THIS->__retvalue,"unknown",MAXSTRINGLEN);
%}
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