[RESEND PATCH v2 2/2] tools lib traceevent: Add support for __print_array()
From: Javi Merino
Date: Thu Jan 15 2015 - 11:51:39 EST
Trace can now generate traces with variable element size arrays. Add
support to parse them.
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Steven Rostedt <srostedt@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Javi Merino <javi.merino@xxxxxxx>
---
tools/lib/traceevent/event-parse.c | 127 +++++++++++++++++++++++++++++++++++++
tools/lib/traceevent/event-parse.h | 8 +++
2 files changed, 135 insertions(+)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index cf3a44bf1ec3..00dd6213449c 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -757,6 +757,11 @@ 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.size);
+ free_arg(arg->int_array.el_size);
+ break;
case PRINT_TYPE:
free(arg->typecast.type);
free_arg(arg->typecast.item);
@@ -2533,6 +2538,71 @@ process_hex(struct event_format *event, struct print_arg *arg, char **tok)
}
static enum event_type
+process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
+{
+ struct print_arg *field;
+ enum event_type type;
+ char *token;
+
+ memset(arg, 0, sizeof(*arg));
+ arg->type = PRINT_INT_ARRAY;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free;
+
+ arg->int_array.field = field;
+
+ free_token(token);
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ","))
+ goto out_free;
+
+ arg->int_array.size = field;
+
+ free_token(token);
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ goto out;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, ")"))
+ goto out_free;
+
+ arg->int_array.el_size = field;
+
+ free_token(token);
+ type = read_token_item(tok);
+ return type;
+
+ out_free:
+ free_arg(field);
+ free_token(token);
+out:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
+static enum event_type
process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
{
struct format_field *field;
@@ -2827,6 +2897,10 @@ process_function(struct event_format *event, struct print_arg *arg,
free_token(token);
return process_hex(event, arg, tok);
}
+ if (strcmp(token, "__print_array") == 0) {
+ free_token(token);
+ return process_int_array(event, arg, tok);
+ }
if (strcmp(token, "__get_str") == 0) {
free_token(token);
return process_str(event, arg, tok);
@@ -3355,6 +3429,7 @@ 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_HEX:
break;
case PRINT_TYPE:
@@ -3765,6 +3840,49 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
}
break;
+ case PRINT_INT_ARRAY: {
+ void *num;
+ int el_size;
+
+ if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
+ unsigned long offset;
+
+ offset = pevent_read_number(pevent,
+ data + arg->int_array.field->dynarray.field->offset,
+ arg->int_array.field->dynarray.field->size);
+ num = data + (offset & 0xffff);
+ } else {
+ field = arg->int_array.field->field.field;
+ if (!field) {
+ str = arg->int_array.field->field.name;
+ field = pevent_find_any_field(event, str);
+ if (!field)
+ goto out_warning_field;
+ arg->int_array.field->field.field = field;
+ }
+ num = data + field->offset;
+ }
+ len = eval_num_arg(data, size, event, arg->int_array.size);
+ el_size = eval_num_arg(data, size, event,
+ arg->int_array.el_size);
+ el_size /= 8;
+ for (i = 0; i < len; i++) {
+ if (i)
+ trace_seq_putc(s, ' ');
+
+ if (el_size == 1)
+ trace_seq_printf(s, "%u", *(uint8_t *)num);
+ else if (el_size == 2)
+ trace_seq_printf(s, "%u", *(uint16_t *)num);
+ else if (el_size == 4)
+ trace_seq_printf(s, "%u", *(uint32_t *)num);
+ else if (el_size == 8)
+ trace_seq_printf(s, "%lu", *(uint64_t *)num);
+
+ num += el_size;
+ }
+ break;
+ }
case PRINT_TYPE:
break;
case PRINT_STRING: {
@@ -4928,6 +5046,15 @@ static void print_args(struct print_arg *args)
print_args(args->hex.size);
printf(")");
break;
+ case PRINT_INT_ARRAY:
+ printf("__print_array(");
+ print_args(args->int_array.field);
+ printf(", ");
+ print_args(args->int_array.size);
+ printf(", ");
+ print_args(args->int_array.el_size);
+ printf(")");
+ break;
case PRINT_STRING:
case PRINT_BSTRING:
printf("__get_str(%s)", args->string.string);
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 7a3873ff9a4f..5ac3e3c00389 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -245,6 +245,12 @@ struct print_arg_hex {
struct print_arg *size;
};
+struct print_arg_int_array {
+ struct print_arg *field;
+ struct print_arg *size;
+ struct print_arg *el_size;
+};
+
struct print_arg_dynarray {
struct format_field *field;
struct print_arg *index;
@@ -273,6 +279,7 @@ enum print_arg_type {
PRINT_FLAGS,
PRINT_SYMBOL,
PRINT_HEX,
+ PRINT_INT_ARRAY,
PRINT_TYPE,
PRINT_STRING,
PRINT_BSTRING,
@@ -292,6 +299,7 @@ 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_func func;
struct print_arg_string string;
struct print_arg_bitmask bitmask;
--
1.9.1
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