On Mon, Mar 16 2015, Stefan Strogin wrote: > Add a function seq_print_stack_trace() which prints stacktraces to seq_files. > > Signed-off-by: Stefan Strogin <[email protected]> > Reviewed-by: SeongJae Park <[email protected]>
Acked-by: Michal Nazarewicz <[email protected]> > --- > 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 <linux/types.h> > +#include <linux/seq_file.h> > > 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 > -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<[email protected]>--<xmpp:[email protected]>--ooO--(_)--Ooo-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
