| 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/module.h> |
| 11 | #include <linux/kallsyms.h> |
| 12 | #include <linux/stacktrace.h> |
| 13 | |
| 14 | void 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 | } |
| 26 | EXPORT_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 |
| 34 | save_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 |
| 40 | save_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 | } |