diff options
| -rw-r--r-- | include/linux/stacktrace.h | 20 | ||||
| -rw-r--r-- | kernel/Makefile | 1 | ||||
| -rw-r--r-- | kernel/stacktrace.c | 24 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 6 |
4 files changed, 50 insertions, 1 deletions
diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h new file mode 100644 index 000000000000..9cc81e572224 --- /dev/null +++ b/include/linux/stacktrace.h @@ -0,0 +1,20 @@ +#ifndef __LINUX_STACKTRACE_H +#define __LINUX_STACKTRACE_H + +#ifdef CONFIG_STACKTRACE +struct stack_trace { + unsigned int nr_entries, max_entries; + unsigned long *entries; +}; + +extern void save_stack_trace(struct stack_trace *trace, + struct task_struct *task, int all_contexts, + unsigned int skip); + +extern void print_stack_trace(struct stack_trace *trace, int spaces); +#else +# define save_stack_trace(trace, task, all, skip) do { } while (0) +# define print_stack_trace(trace) do { } while (0) +#endif + +#endif diff --git a/kernel/Makefile b/kernel/Makefile index 82fb182f6f61..e7fd20e70f1b 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -10,6 +10,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \ kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \ hrtimer.o +obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-y += time/ obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o obj-$(CONFIG_FUTEX) += futex.o diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c new file mode 100644 index 000000000000..b71816e47a30 --- /dev/null +++ b/kernel/stacktrace.c @@ -0,0 +1,24 @@ +/* + * kernel/stacktrace.c + * + * Stack trace management functions + * + * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> + */ +#include <linux/sched.h> +#include <linux/kallsyms.h> +#include <linux/stacktrace.h> + +void print_stack_trace(struct stack_trace *trace, int spaces) +{ + int i, j; + + for (i = 0; i < trace->nr_entries; i++) { + unsigned long ip = trace->entries[i]; + + for (j = 0; j < spaces + 1; j++) + printk(" "); + print_ip_sym(ip); + } +} + diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7b3863d4f5e8..04e374c6fd46 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -107,7 +107,7 @@ config DEBUG_SLAB_LEAK config DEBUG_PREEMPT bool "Debug preemptible kernel" - depends on DEBUG_KERNEL && PREEMPT + depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT default y help If you say Y here then the kernel will use a debug variant of the @@ -149,6 +149,10 @@ config DEBUG_SPINLOCK_SLEEP If you say Y here, various routines which may sleep will become very noisy if they are called with a spinlock held. +config STACKTRACE + bool + depends on STACKTRACE_SUPPORT + config DEBUG_KOBJECT bool "kobject debugging" depends on DEBUG_KERNEL |