From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51]) by kanga.kvack.org (Postfix) with ESMTP id AA3006B006E for ; Mon, 16 Mar 2015 12:08:25 -0400 (EDT) Received: by pabyw6 with SMTP id yw6so68835370pab.2 for ; Mon, 16 Mar 2015 09:08:25 -0700 (PDT) Received: from mailout3.w1.samsung.com (mailout3.w1.samsung.com. [210.118.77.13]) by mx.google.com with ESMTPS id l1si6083350pdm.154.2015.03.16.09.08.24 for (version=TLSv1 cipher=RC4-MD5 bits=128/128); Mon, 16 Mar 2015 09:08:24 -0700 (PDT) Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NLB00K3QBONVF00@mailout3.w1.samsung.com> for linux-mm@kvack.org; Mon, 16 Mar 2015 16:12:23 +0000 (GMT) From: Stefan Strogin Subject: [PATCH v4 3/5] stacktrace: add seq_print_stack_trace() Date: Mon, 16 Mar 2015 19:06:58 +0300 Message-id: <19b2815dbb60bfd38d17596a3d466637ee44c9a5.1426521377.git.s.strogin@partner.samsung.com> In-reply-to: References: In-reply-to: References: Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Stefan Strogin , Joonsoo Kim , Andrew Morton , Marek Szyprowski , Michal Nazarewicz , aneesh.kumar@linux.vnet.ibm.com, Laurent Pinchart , Dmitry Safonov , Pintu Kumar , Weijie Yang , Laura Abbott , SeongJae Park , Hui Zhu , Minchan Kim , Dyasly Sergey , Vyacheslav Tyrtov , Aleksei Mateosian , gregory.0xf0@gmail.com, sasha.levin@oracle.com, gioh.kim@lge.com, pavel@ucw.cz, stefan.strogin@gmail.com Add a function seq_print_stack_trace() which prints stacktraces to seq_files. Signed-off-by: Stefan Strogin Reviewed-by: SeongJae Park --- include/linux/stacktrace.h | 4 ++++ kernel/stacktrace.c | 17 +++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h index 0a34489..d80f2e9 100644 --- a/include/linux/stacktrace.h +++ b/include/linux/stacktrace.h @@ -2,6 +2,7 @@ #define __LINUX_STACKTRACE_H #include +#include struct task_struct; struct pt_regs; @@ -22,6 +23,8 @@ extern void save_stack_trace_tsk(struct task_struct *tsk, extern void print_stack_trace(struct stack_trace *trace, int spaces); extern int snprint_stack_trace(char *buf, size_t size, struct stack_trace *trace, int spaces); +extern void seq_print_stack_trace(struct seq_file *m, + struct stack_trace *trace, int spaces); #ifdef CONFIG_USER_STACKTRACE_SUPPORT extern void save_stack_trace_user(struct stack_trace *trace); @@ -35,6 +38,7 @@ extern void save_stack_trace_user(struct stack_trace *trace); # define save_stack_trace_user(trace) do { } while (0) # define print_stack_trace(trace, spaces) do { } while (0) # define snprint_stack_trace(buf, size, trace, spaces) do { } while (0) +# define seq_print_stack_trace(m, trace, spaces) do { } while (0) #endif #endif diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index b6e4c16..66ef6f4 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -57,6 +57,23 @@ int snprint_stack_trace(char *buf, size_t size, } EXPORT_SYMBOL_GPL(snprint_stack_trace); +void seq_print_stack_trace(struct seq_file *m, struct stack_trace *trace, + int spaces) +{ + int i; + + if (WARN_ON(!trace->entries)) + return; + + for (i = 0; i < trace->nr_entries; i++) { + unsigned long ip = trace->entries[i]; + + seq_printf(m, "%*c[<%p>] %pS\n", 1 + spaces, ' ', + (void *) ip, (void *) ip); + } +} +EXPORT_SYMBOL_GPL(seq_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 -- 2.1.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org