lkml.org 
[lkml]   [2021]   [Sep]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/1] lib, stackdepot: Add helper to print stack entries into buffer.
From
Date


On 13/9/21 6:51 pm, Vlastimil Babka wrote:
> On 9/10/21 16:10, Imran Khan wrote:
>> To print stack entries into a buffer, users of stackdepot,
>> first get a list of stack entries using stack_depot_fetch
>> and then print this list into a buffer using stack_trace_snprint.
>> Provide a helper in stackdepot for this purpose.
>> Also change above mentioned users to use this helper.
>>
>> Signed-off-by: Imran Khan <imran.f.khan@oracle.com>
>> Suggested-by: Vlastimil Babka <vbabka@suse.cz>
>
> Acked-by: Vlastimil Babka <vbabka@suse.cz>
>
>
Thanks for the review.

A comment below:
>
>> --- a/lib/stackdepot.c
>> +++ b/lib/stackdepot.c
>> @@ -214,6 +214,29 @@ static inline struct stack_record *find_stack(struct stack_record *bucket,
>> return NULL;
>> }

[...]

>> + */
>> +int stack_depot_snprint(depot_stack_handle_t handle, char *buf, size_t size,
>> + int spaces)
>> +{
>> + unsigned long *entries;
>> + unsigned int nr_entries;
>> +
>> + nr_entries = stack_depot_fetch(handle, &entries);
>> + return stack_trace_snprint(buf, size, entries, nr_entries, 0);
>
> stack_trace_snprint() has a WARN_ON(!entries).
> So maybe we should not call it if nr_entries is 0 (because e.g. handle was
> 0) as the warnings are not useful in that case.
>
Agree. I have addressed this feedback in v2 of patch.


Thanks
-- Imran

\
 
 \ /
  Last update: 2021-09-14 06:28    [W:0.160 / U:0.912 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site