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 011626B0070 for ; Fri, 26 Dec 2014 09:40:30 -0500 (EST) Received: by mail-pa0-f51.google.com with SMTP id ey11so13372871pad.38 for ; Fri, 26 Dec 2014 06:40:29 -0800 (PST) Received: from mailout4.w1.samsung.com (mailout4.w1.samsung.com. [210.118.77.14]) by mx.google.com with ESMTPS id ql8si3300536pac.165.2014.12.26.06.40.27 for (version=TLSv1 cipher=RC4-MD5 bits=128/128); Fri, 26 Dec 2014 06:40:28 -0800 (PST) Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout4.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NH700COT2A2NSA0@mailout4.w1.samsung.com> for linux-mm@kvack.org; Fri, 26 Dec 2014 14:44:26 +0000 (GMT) From: "Stefan I. Strogin" Subject: [PATCH 1/3] stacktrace: add seq_print_stack_trace() Date: Fri, 26 Dec 2014 17:39:02 +0300 Message-id: <00bfb81bf8749f3be738d20dd263b81490693309.1419602920.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 I. 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 Add a function seq_print_stack_trace() which prints stacktraces to seq_files. Signed-off-by: Stefan I. Strogin --- 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 669045a..6d62484 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; @@ -24,6 +25,8 @@ 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); @@ -37,6 +40,7 @@ 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