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Subject[PATCH v3 2/3] tools lib traceevent: factor out allocating and processing args
Date
The sequence of allocating the print_arg field, calling process_arg()
and verifying that the next event delimiter is repeated twice in
process_hex() and will also be used for process_int_array(). Factor it
out to a function to avoid writing the same code again and again.

Cc: Namhyung Kim <namhyung@kernel.org>
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>
---

This patch wasn't part of v2. It avoids repeating code in patch 3.

tools/lib/traceevent/event-parse.c | 77 ++++++++++++++++++++------------------
1 file changed, 40 insertions(+), 37 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index cf3a44bf1ec3..9d063b829907 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2013,6 +2013,38 @@ process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
return EVENT_ERROR;
}

+static int alloc_and_process_arg(struct event_format *event, char *next_token,
+ struct print_arg **print_arg)
+{
+ struct print_arg *field;
+ enum event_type type;
+ char *token;
+ int ret = 0;
+
+ field = alloc_arg();
+ if (!field) {
+ do_warning_event(event, "%s: not enough memory!", __func__);
+ errno = ENOMEM;
+ return -1;
+ }
+
+ type = process_arg(event, field, &token);
+
+ if (test_type_token(type, token, EVENT_DELIM, next_token)) {
+ errno = EINVAL;
+ ret = -1;
+ free_arg(field);
+ goto out_free_token;
+ }
+
+ *print_arg = field;
+
+out_free_token:
+ free_token(token);
+
+ return ret;
+}
+
static char *arg_eval (struct print_arg *arg);

static unsigned long long
@@ -2485,49 +2517,20 @@ out_free:
static enum event_type
process_hex(struct event_format *event, struct print_arg *arg, char **tok)
{
- struct print_arg *field;
- enum event_type type;
- char *token = NULL;
-
memset(arg, 0, sizeof(*arg));
arg->type = PRINT_HEX;

- field = alloc_arg();
- if (!field) {
- do_warning_event(event, "%s: not enough memory!", __func__);
- goto out_free;
- }
-
- type = process_arg(event, field, &token);
-
- if (test_type_token(type, token, EVENT_DELIM, ","))
- goto out_free;
-
- arg->hex.field = field;
-
- free_token(token);
-
- field = alloc_arg();
- if (!field) {
- do_warning_event(event, "%s: not enough memory!", __func__);
- *tok = NULL;
- return EVENT_ERROR;
- }
-
- type = process_arg(event, field, &token);
-
- if (test_type_token(type, token, EVENT_DELIM, ")"))
- goto out_free;
+ if (alloc_and_process_arg(event, ",", &arg->hex.field))
+ goto out;

- arg->hex.size = field;
+ if (alloc_and_process_arg(event, ")", &arg->hex.size))
+ goto free_field;

- free_token(token);
- type = read_token_item(tok);
- return type;
+ return read_token_item(tok);

- out_free:
- free_arg(field);
- free_token(token);
+free_field:
+ free_arg(arg->hex.field);
+out:
*tok = NULL;
return EVENT_ERROR;
}
--
1.9.1


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