stacktrace.c

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/*
 * kernel/stacktrace.c
 *
 * Stack trace management functions
 *
 *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <[email protected]>
 */
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/kallsyms.h>
#include <linux/stacktrace.h>

void print_stack_trace(struct stack_trace *trace, int spaces)
{
    int i;

    if (WARN_ON(!trace->entries))
        return;

    for (i = 0; i < trace->nr_entries; i++) {
        printk("%*c", 1 + spaces, ' ');
        print_ip_sym(trace->entries[i]);
    }
}
EXPORT_SYMBOL_GPL(print_stack_trace);

/*
 * Architectures that do not implement save_stack_trace_tsk or
 * save_stack_trace_regs get this weak alias and a once-per-bootup warning
 * (whenever this facility is utilized - for example by procfs):
 */
__weak void
save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
    WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");
}

__weak void
save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
{
    WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");
}