Root/kernel/stacktrace.c

1/*
2 * kernel/stacktrace.c
3 *
4 * Stack trace management functions
5 *
6 * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
7 */
8#include <linux/sched.h>
9#include <linux/kernel.h>
10#include <linux/export.h>
11#include <linux/kallsyms.h>
12#include <linux/stacktrace.h>
13
14void print_stack_trace(struct stack_trace *trace, int spaces)
15{
16    int i;
17
18    if (WARN_ON(!trace->entries))
19        return;
20
21    for (i = 0; i < trace->nr_entries; i++) {
22        printk("%*c", 1 + spaces, ' ');
23        print_ip_sym(trace->entries[i]);
24    }
25}
26EXPORT_SYMBOL_GPL(print_stack_trace);
27
28/*
29 * Architectures that do not implement save_stack_trace_tsk or
30 * save_stack_trace_regs get this weak alias and a once-per-bootup warning
31 * (whenever this facility is utilized - for example by procfs):
32 */
33__weak void
34save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
35{
36    WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");
37}
38
39__weak void
40save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
41{
42    WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");
43}
44

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