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Date: Sat, 27 Dec 2014 16:04:04 +0900 (KST) From: SeongJae Park <sj38.park@...il.com> To: "Stefan I. Strogin" <s.strogin@...tner.samsung.com> cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, Joonsoo Kim <iamjoonsoo.kim@....com>, Andrew Morton <akpm@...ux-foundation.org>, Marek Szyprowski <m.szyprowski@...sung.com>, Michal Nazarewicz <mina86@...a86.com>, aneesh.kumar@...ux.vnet.ibm.com, Laurent Pinchart <laurent.pinchart@...asonboard.com>, Dmitry Safonov <d.safonov@...tner.samsung.com>, Pintu Kumar <pintu.k@...sung.com>, Weijie Yang <weijie.yang@...sung.com>, Laura Abbott <lauraa@...eaurora.org>, SeongJae Park <sj38.park@...il.com>, Hui Zhu <zhuhui@...omi.com>, Minchan Kim <minchan@...nel.org>, Dyasly Sergey <s.dyasly@...sung.com>, Vyacheslav Tyrtov <v.tyrtov@...sung.com> Subject: Re: [PATCH 1/3] stacktrace: add seq_print_stack_trace() On Fri, 26 Dec 2014, Stefan I. Strogin wrote: > Add a function seq_print_stack_trace() which prints stacktraces to seq_files. > > Signed-off-by: Stefan I. Strogin <s.strogin@...tner.samsung.com> Reviewed-by: SeongJae Park <sj38.park@...il.com> > --- > 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 <linux/types.h> > +#include <linux/seq_file.h> > > 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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