diff options
Diffstat (limited to 'kernel/stacktrace.c')
| -rw-r--r-- | kernel/stacktrace.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c new file mode 100644 index 00000000..00fe55cc --- /dev/null +++ b/kernel/stacktrace.c @@ -0,0 +1,43 @@ +/* + * kernel/stacktrace.c + * + * Stack trace management functions + * + * 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; + + 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"); +} |