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Date: Tue, 13 Mar 2018 11:27:32 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: changbin.du@...el.com, jolsa@...hat.com, peterz@...radead.org,
mingo@...hat.com, namhyung@...nel.org, yan.y.zhao@...el.com,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH] perf trace: __print_array should print hex format
instead of dec
Em Tue, Mar 13, 2018 at 06:39:17PM +0800, changbin.du@...el.com escreveu:
> From: Changbin Du <changbin.du@...el.com>
>
> The token '__print_array' is to print the array in hex format, but not
> decimal numbers. The implementation of __print_array in kernel side is:
> __print_array()->trace_print_array_seq()
>
> This patch align the perf's behavior with kernel so we have a consistent
> event format.
Look ok, i.e. makes the userspace formatting do what the equivalent
kernel code does, Rostedt, Ack?
- Arnaldo
> Reported-by: Zhao Yan <yan.y.zhao@...el.com>
> Signed-off-by: Changbin Du <changbin.du@...el.com>
> ---
> tools/lib/traceevent/event-parse.c | 60 +++++++++++-----------
> tools/lib/traceevent/event-parse.h | 6 +--
> .../perf/util/scripting-engines/trace-event-perl.c | 8 +--
> .../util/scripting-engines/trace-event-python.c | 8 +--
> 4 files changed, 42 insertions(+), 40 deletions(-)
>
> diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
> index e5f2acb..d9f770c 100644
> --- a/tools/lib/traceevent/event-parse.c
> +++ b/tools/lib/traceevent/event-parse.c
> @@ -835,10 +835,10 @@ static void free_arg(struct print_arg *arg)
> free_arg(arg->hex.field);
> free_arg(arg->hex.size);
> break;
> - case PRINT_INT_ARRAY:
> - free_arg(arg->int_array.field);
> - free_arg(arg->int_array.count);
> - free_arg(arg->int_array.el_size);
> + case PRINT_ARRAY:
> + free_arg(arg->array.field);
> + free_arg(arg->array.count);
> + free_arg(arg->array.el_size);
> break;
> case PRINT_TYPE:
> free(arg->typecast.type);
> @@ -2669,25 +2669,25 @@ static enum event_type
> process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
> {
> memset(arg, 0, sizeof(*arg));
> - arg->type = PRINT_INT_ARRAY;
> + arg->type = PRINT_ARRAY;
>
> - if (alloc_and_process_delim(event, ",", &arg->int_array.field))
> + if (alloc_and_process_delim(event, ",", &arg->array.field))
> goto out;
>
> - if (alloc_and_process_delim(event, ",", &arg->int_array.count))
> + if (alloc_and_process_delim(event, ",", &arg->array.count))
> goto free_field;
>
> - if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
> + if (alloc_and_process_delim(event, ")", &arg->array.el_size))
> goto free_size;
>
> return read_token_item(tok);
>
> free_size:
> - free_arg(arg->int_array.count);
> - arg->int_array.count = NULL;
> + free_arg(arg->array.count);
> + arg->array.count = NULL;
> free_field:
> - free_arg(arg->int_array.field);
> - arg->int_array.field = NULL;
> + free_arg(arg->array.field);
> + arg->array.field = NULL;
> out:
> *tok = NULL;
> return EVENT_ERROR;
> @@ -3564,7 +3564,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
> break;
> case PRINT_FLAGS:
> case PRINT_SYMBOL:
> - case PRINT_INT_ARRAY:
> + case PRINT_ARRAY:
> case PRINT_HEX:
> case PRINT_HEX_STR:
> break;
> @@ -4015,44 +4015,45 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
> }
> break;
>
> - case PRINT_INT_ARRAY: {
> + case PRINT_ARRAY: {
> void *num;
> int el_size;
>
> - if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
> + if (arg->array.field->type == PRINT_DYNAMIC_ARRAY) {
> unsigned long offset;
> struct format_field *field =
> - arg->int_array.field->dynarray.field;
> + arg->array.field->dynarray.field;
> offset = pevent_read_number(pevent,
> data + field->offset,
> field->size);
> num = data + (offset & 0xffff);
> } else {
> - field = arg->int_array.field->field.field;
> + field = arg->array.field->field.field;
> if (!field) {
> - str = arg->int_array.field->field.name;
> + str = arg->array.field->field.name;
> field = pevent_find_any_field(event, str);
> if (!field)
> goto out_warning_field;
> - arg->int_array.field->field.field = field;
> + arg->array.field->field.field = field;
> }
> num = data + field->offset;
> }
> - len = eval_num_arg(data, size, event, arg->int_array.count);
> + len = eval_num_arg(data, size, event, arg->array.count);
> el_size = eval_num_arg(data, size, event,
> - arg->int_array.el_size);
> + arg->array.el_size);
> + trace_seq_putc(s, '{');
> for (i = 0; i < len; i++) {
> if (i)
> trace_seq_putc(s, ' ');
>
> if (el_size == 1) {
> - trace_seq_printf(s, "%u", *(uint8_t *)num);
> + trace_seq_printf(s, "0x%x", *(uint8_t *)num);
> } else if (el_size == 2) {
> - trace_seq_printf(s, "%u", *(uint16_t *)num);
> + trace_seq_printf(s, "0x%x", *(uint16_t *)num);
> } else if (el_size == 4) {
> - trace_seq_printf(s, "%u", *(uint32_t *)num);
> + trace_seq_printf(s, "0x%x", *(uint32_t *)num);
> } else if (el_size == 8) {
> - trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
> + trace_seq_printf(s, "0x%"PRIx64, *(uint64_t *)num);
> } else {
> trace_seq_printf(s, "BAD SIZE:%d 0x%x",
> el_size, *(uint8_t *)num);
> @@ -4061,6 +4062,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
>
> num += el_size;
> }
> + trace_seq_putc(s, '}');
> break;
> }
> case PRINT_TYPE:
> @@ -5795,13 +5797,13 @@ static void print_args(struct print_arg *args)
> print_args(args->hex.size);
> printf(")");
> break;
> - case PRINT_INT_ARRAY:
> + case PRINT_ARRAY:
> printf("__print_array(");
> - print_args(args->int_array.field);
> + print_args(args->array.field);
> printf(", ");
> - print_args(args->int_array.count);
> + print_args(args->array.count);
> printf(", ");
> - print_args(args->int_array.el_size);
> + print_args(args->array.el_size);
> printf(")");
> break;
> case PRINT_STRING:
> diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
> index 0c03538..6ae2e8b 100644
> --- a/tools/lib/traceevent/event-parse.h
> +++ b/tools/lib/traceevent/event-parse.h
> @@ -249,7 +249,7 @@ struct print_arg_hex {
> struct print_arg *size;
> };
>
> -struct print_arg_int_array {
> +struct print_arg_array {
> struct print_arg *field;
> struct print_arg *count;
> struct print_arg *el_size;
> @@ -283,7 +283,7 @@ enum print_arg_type {
> PRINT_FLAGS,
> PRINT_SYMBOL,
> PRINT_HEX,
> - PRINT_INT_ARRAY,
> + PRINT_ARRAY,
> PRINT_TYPE,
> PRINT_STRING,
> PRINT_BSTRING,
> @@ -305,7 +305,7 @@ struct print_arg {
> struct print_arg_flags flags;
> struct print_arg_symbol symbol;
> struct print_arg_hex hex;
> - struct print_arg_int_array int_array;
> + struct print_arg_array array;
> struct print_arg_func func;
> struct print_arg_string string;
> struct print_arg_bitmask bitmask;
> diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
> index 7b79c41..112d627 100644
> --- a/tools/perf/util/scripting-engines/trace-event-perl.c
> +++ b/tools/perf/util/scripting-engines/trace-event-perl.c
> @@ -224,10 +224,10 @@ static void define_event_symbols(struct event_format *event,
> define_event_symbols(event, ev_name, args->hex.field);
> define_event_symbols(event, ev_name, args->hex.size);
> break;
> - case PRINT_INT_ARRAY:
> - define_event_symbols(event, ev_name, args->int_array.field);
> - define_event_symbols(event, ev_name, args->int_array.count);
> - define_event_symbols(event, ev_name, args->int_array.el_size);
> + case PRINT_ARRAY:
> + define_event_symbols(event, ev_name, args->array.field);
> + define_event_symbols(event, ev_name, args->array.count);
> + define_event_symbols(event, ev_name, args->array.el_size);
> break;
> case PRINT_BSTRING:
> case PRINT_DYNAMIC_ARRAY:
> diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
> index ea07088..fb24f83 100644
> --- a/tools/perf/util/scripting-engines/trace-event-python.c
> +++ b/tools/perf/util/scripting-engines/trace-event-python.c
> @@ -270,10 +270,10 @@ static void define_event_symbols(struct event_format *event,
> define_event_symbols(event, ev_name, args->hex.field);
> define_event_symbols(event, ev_name, args->hex.size);
> break;
> - case PRINT_INT_ARRAY:
> - define_event_symbols(event, ev_name, args->int_array.field);
> - define_event_symbols(event, ev_name, args->int_array.count);
> - define_event_symbols(event, ev_name, args->int_array.el_size);
> + case PRINT_ARRAY:
> + define_event_symbols(event, ev_name, args->array.field);
> + define_event_symbols(event, ev_name, args->array.count);
> + define_event_symbols(event, ev_name, args->array.el_size);
> break;
> case PRINT_STRING:
> break;
> --
> 2.7.4
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