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| author | Howard Cochran <hcochran@lexmark.com> | 2013-11-01 21:53:56 (GMT) |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-11-04 17:34:43 (GMT) |
| commit | b30f75eba27a9ab0704cbc501e9be3b025ce56fe (patch) | |
| tree | 37b19d95f7a22110ea8efe836b47cbedc6485730 /tools/lib | |
| parent | 0970b5f438261216afcd0ccaa2fcfffc83df7ca2 (diff) | |
| download | linux-b30f75eba27a9ab0704cbc501e9be3b025ce56fe.tar.xz | |
tools lib traceevent: Handle __print_hex(__get_dynamic_array(fieldname), len)
The kernel has a few events with a format similar to this excerpt:
field:unsigned int len; offset:12; size:4; signed:0;
field:__data_loc unsigned char[] data_array; offset:16; size:4; signed:0;
print fmt: "%s", __print_hex(__get_dynamic_array(data_array), REC->len)
trace-cmd could already parse that arg correctly, but print_str_arg()
was unable to handle the first parameter being a dynamic array. (It
just printed a "field not found" warning).
Teach print_str_arg's PRINT_HEX case to handle the nested
PRINT_DYNAMIC_ARRAY correctly. The output now matches the kernel's own
formatting for this case.
Signed-off-by: Howard Cochran <hcochran@lexmark.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1381503349-12271-1-git-send-email-hcochran@lexmark.com
[ Removed "polish compare", we don't do that here ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 013c8d3..0a1ffe0 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -3588,15 +3588,23 @@ static void print_str_arg(struct trace_seq *s, void *data, int size, } break; case PRINT_HEX: - field = arg->hex.field->field.field; - if (!field) { - str = arg->hex.field->field.name; - field = pevent_find_any_field(event, str); - if (!field) - goto out_warning_field; - arg->hex.field->field.field = field; + if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) { + unsigned long offset; + offset = pevent_read_number(pevent, + data + arg->hex.field->dynarray.field->offset, + arg->hex.field->dynarray.field->size); + hex = data + (offset & 0xffff); + } else { + field = arg->hex.field->field.field; + if (!field) { + str = arg->hex.field->field.name; + field = pevent_find_any_field(event, str); + if (!field) + goto out_warning_field; + arg->hex.field->field.field = field; + } + hex = data + field->offset; } - hex = data + field->offset; len = eval_num_arg(data, size, event, arg->hex.size); for (i = 0; i < len; i++) { if (i) |