[RFC PATCH v6 3/9] tools lib traceevent: Add support for __print_u{8,16,32,64}_array()

Javi Merino
2014-12-05T19:04:14Z

Trace can now generate traces with u8, u16, u32 and u64 dynamic
arrays. Add support to parse them.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
---
tools/lib/traceevent/event-parse.c | 62 +++++++++++++++++++++++++++++++++++---
tools/lib/traceevent/event-parse.h | 4 +++
2 files changed, 61 insertions(+), 5 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index f12ea53cc83b..f67260bddd65 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -753,6 +753,10 @@ static void free_arg(struct print_arg *arg)
free_arg(arg->symbol.field);
free_flag_sym(arg->symbol.symbols);
break;
+ case PRINT_U8:
+ case PRINT_U16:
+ case PRINT_U32:
+ case PRINT_U64:
case PRINT_HEX:
free_arg(arg->num.field);
free_arg(arg->num.size);
@@ -2827,6 +2831,22 @@ process_function(struct event_format *event, struct print_arg *arg,
free_token(token);
return process_hex(event, arg, tok);
}
+ if (strcmp(token, "__print_u8_array") == 0) {
+ free_token(token);
+ return process_num(event, arg, tok, PRINT_U8);
+ }
+ if (strcmp(token, "__print_u16_array") == 0) {
+ free_token(token);
+ return process_num(event, arg, tok, PRINT_U16);
+ }
+ if (strcmp(token, "__print_u32_array") == 0) {
+ free_token(token);
+ return process_num(event, arg, tok, PRINT_U32);
+ }
+ if (strcmp(token, "__print_u64_array") == 0) {
+ free_token(token);
+ return process_num(event, arg, tok, PRINT_U64);
+ }
if (strcmp(token, "__get_str") == 0) {
free_token(token);
return process_str(event, arg, tok);
@@ -3355,6 +3375,10 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
break;
case PRINT_FLAGS:
case PRINT_SYMBOL:
+ case PRINT_U8:
+ case PRINT_U16:
+ case PRINT_U32:
+ case PRINT_U64:
case PRINT_HEX:
break;
case PRINT_TYPE:
@@ -3660,7 +3684,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
unsigned long long val, fval;
unsigned long addr;
char *str;
- unsigned char *hex;
+ void *num;
int print;
int i, len;

@@ -3739,13 +3763,17 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
}
}
break;
+ case PRINT_U8:
+ case PRINT_U16:
+ case PRINT_U32:
+ case PRINT_U64:
case PRINT_HEX:
if (arg->num.field->type == PRINT_DYNAMIC_ARRAY) {
unsigned long offset;
offset = pevent_read_number(pevent,
data + arg->num.field->dynarray.field->offset,
arg->num.field->dynarray.field->size);
- hex = data + (offset & 0xffff);
+ num = data + (offset & 0xffff);
} else {
field = arg->num.field->field.field;
if (!field) {
@@ -3755,13 +3783,24 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
goto out_warning_field;
arg->num.field->field.field = field;
}
- hex = data + field->offset;
+ num = data + field->offset;
}
len = eval_num_arg(data, size, event, arg->num.size);
for (i = 0; i < len; i++) {
if (i)
trace_seq_putc(s, ' ');
- trace_seq_printf(s, "%02x", hex[i]);
+ if (arg->type == PRINT_HEX)
+ trace_seq_printf(s, "%02x",
+ ((uint8_t *)num)[i]);
+ else if (arg->type == PRINT_U8)
+ trace_seq_printf(s, "%u", ((uint8_t *)num)[i]);
+ else if (arg->type == PRINT_U16)
+ trace_seq_printf(s, "%u", ((uint16_t *)num)[i]);
+ else if (arg->type == PRINT_U32)
+ trace_seq_printf(s, "%u", ((uint32_t *)num)[i]);
+ else /* PRINT_U64 */
+ trace_seq_printf(s, "%lu",
+ ((uint64_t *)num)[i]);
}
break;

@@ -4922,7 +4961,20 @@ static void print_args(struct print_arg *args)
printf(")");
break;
case PRINT_HEX:
- printf("__print_hex(");
+ case PRINT_U8:
+ case PRINT_U16:
+ case PRINT_U32:
+ case PRINT_U64:
+ if (args->type == PRINT_HEX)
+ printf("__print_hex(");
+ else if (args->type == PRINT_U8)
+ printf("__print_u8_array(");
+ else if (args->type == PRINT_U16)
+ printf("__print_u16_array(");
+ else if (args->type == PRINT_U32)
+ printf("__print_u32_array(");
+ else /* PRINT_U64 */
+ printf("__print_u64_array(");
print_args(args->num.field);
printf(", ");
print_args(args->num.size);
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 2bf72e908a74..51f1f0f0a3b5 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -272,6 +272,10 @@ enum print_arg_type {
PRINT_FIELD,
PRINT_FLAGS,
PRINT_SYMBOL,
+ PRINT_U8,
+ PRINT_U16,
+ PRINT_U32,
+ PRINT_U64,
PRINT_HEX,
PRINT_TYPE,
PRINT_STRING,
--
1.9.1