From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965914AbbCPQIc (ORCPT ); Mon, 16 Mar 2015 12:08:32 -0400 Received: from mailout3.w1.samsung.com ([210.118.77.13]:23697 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965888AbbCPQIV (ORCPT ); Mon, 16 Mar 2015 12:08:21 -0400 X-AuditID: cbfec7f5-b7fc86d0000066b7-eb-5506ff5c9d75 From: Stefan Strogin 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 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> X-Mailer: git-send-email 2.1.0 In-reply-to: References: In-reply-to: References: X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprMIsWRmVeSWpSXmKPExsVy+t/xy7ox/9lCDT5vkLF4OG8Su8Wc9WvY LB6/nsdi8WnlUzaLZ01fGC2mTd/AarGyu5nNYnvnDHaLzolL2C0u75rDZnFvzX9Wi7VH7rJb LDjewmqx7Ot7dou7p46yWfR9P8xuMXm2lMW3k3OYLRYfuc1scW1HP5PF5Tf/2S2mzvjBbnFy w1lWiw3NXA4SHpf7epk8ds66y+4xu2Mmq8emVZ1sHps+TWL36Hp7hcnjxIzfLB4PDm1m8Vj3 5xWTx8ent1g8Dr7bw+TRt2UVo8eK1d/ZPT5vkvPo2viLNYA/issmJTUnsyy1SN8ugStjz5ce 1oKnghVnZm1ibGB8xtfFyMkhIWAicW7HVDYIW0ziwr31QDYXh5DAUkaJv/M3sUM4vUwSx1vu MYNUsQF1HLswnRHEFgGydzfPZQQpYhbYyibRcPIHC0hCWMBeovfcGqBRHBwsAqoSG/tjQMK8 AqkSr981Qm2Tk9iw+z/YHE4BR4l9pzrAWoUEHCQW3PuKU3wCI/8CRoZVjKKppckFxUnpuUZ6 xYm5xaV56XrJ+bmbGCER+XUH49JjVocYBTgYlXh4I+TZQoVYE8uKK3MPMUpwMCuJ8J56BRTi TUmsrEotyo8vKs1JLT7EyMTBKdXAuOfuhFuyPhsEpvTN4ZU+bS93T/suu9z+0/uffG5yds/g +NB1Tre1Rd9NxvJVuPArw+al6/4ZlCx+4DDz/twK3m1L6+bfeRO+3PuQvvAaVlG9Q4mPJnHv qjeOvJxgqS32giPx2hbvlzaZdYvn7zXZddbsmf3j3Bjp+28MTVa/iak+lL6x58chTyWW4oxE Qy3mouJEAJr95zymAgAA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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