diff options
Diffstat (limited to 'kernel/stacktrace.c')
| -rw-r--r-- | kernel/stacktrace.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index b71816e47a3..00fe55cc5a8 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -6,19 +6,38 @@ * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> */ #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, j; + int i; - for (i = 0; i < trace->nr_entries; i++) { - unsigned long ip = trace->entries[i]; + if (WARN_ON(!trace->entries)) + return; - for (j = 0; j < spaces + 1; j++) - printk(" "); - print_ip_sym(ip); + 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"); +} |