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Message-Id: <1386833777-3790-14-git-send-email-namhyung@kernel.org>
Date: Thu, 12 Dec 2013 16:36:16 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Frederic Weisbecker <fweisbec@...il.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 13/14] tools lib traceevent: Get rid of die() in some string conversion funcitons
Those functions are for stringify filter arguments. As caller of
those functions handles NULL string properly, it seems that it's
enough to return NULL rather than calling die().
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/lib/traceevent/parse-filter.c | 58 +++++++++++++++++++++++--------------
1 file changed, 36 insertions(+), 22 deletions(-)
diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
index 9303c55128db..32ab4396653c 100644
--- a/tools/lib/traceevent/parse-filter.c
+++ b/tools/lib/traceevent/parse-filter.c
@@ -1361,8 +1361,10 @@ enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
if (ret >= 0 && pevent->test_filters) {
char *test;
test = pevent_filter_make_string(filter, event->event->id);
- printf(" '%s: %s'\n", event->event->name, test);
- free(test);
+ if (test) {
+ printf(" '%s: %s'\n", event->event->name, test);
+ free(test);
+ }
}
}
@@ -2097,7 +2099,9 @@ static char *op_to_str(struct event_filter *filter, struct filter_arg *arg)
default:
break;
}
- str = malloc_or_die(6);
+ str = malloc(6);
+ if (str == NULL)
+ break;
if (val)
strcpy(str, "TRUE");
else
@@ -2120,7 +2124,9 @@ static char *op_to_str(struct event_filter *filter, struct filter_arg *arg)
}
len = strlen(left) + strlen(right) + strlen(op) + 10;
- str = malloc_or_die(len);
+ str = malloc(len);
+ if (str == NULL)
+ break;
snprintf(str, len, "(%s) %s (%s)",
left, op, right);
break;
@@ -2138,7 +2144,9 @@ static char *op_to_str(struct event_filter *filter, struct filter_arg *arg)
right_val = 0;
if (right_val >= 0) {
/* just return the opposite */
- str = malloc_or_die(6);
+ str = malloc(6);
+ if (str == NULL)
+ break;
if (right_val)
strcpy(str, "FALSE");
else
@@ -2146,8 +2154,9 @@ static char *op_to_str(struct event_filter *filter, struct filter_arg *arg)
break;
}
len = strlen(right) + strlen(op) + 3;
- str = malloc_or_die(len);
- snprintf(str, len, "%s(%s)", op, right);
+ str = malloc(len);
+ if (str)
+ snprintf(str, len, "%s(%s)", op, right);
break;
default:
@@ -2163,9 +2172,9 @@ static char *val_to_str(struct event_filter *filter, struct filter_arg *arg)
{
char *str;
- str = malloc_or_die(30);
-
- snprintf(str, 30, "%lld", arg->value.val);
+ str = malloc(30);
+ if (str)
+ snprintf(str, 30, "%lld", arg->value.val);
return str;
}
@@ -2220,12 +2229,14 @@ static char *exp_to_str(struct event_filter *filter, struct filter_arg *arg)
op = "^";
break;
default:
- die("oops in exp");
+ op = "[ERROR IN EXPRESSION TYPE]";
+ break;
}
len = strlen(op) + strlen(lstr) + strlen(rstr) + 4;
- str = malloc_or_die(len);
- snprintf(str, len, "%s %s %s", lstr, op, rstr);
+ str = malloc(len);
+ if (str)
+ snprintf(str, len, "%s %s %s", lstr, op, rstr);
out:
free(lstr);
free(rstr);
@@ -2271,9 +2282,9 @@ static char *num_to_str(struct event_filter *filter, struct filter_arg *arg)
op = "<=";
len = strlen(lstr) + strlen(op) + strlen(rstr) + 4;
- str = malloc_or_die(len);
- sprintf(str, "%s %s %s", lstr, op, rstr);
-
+ str = malloc(len);
+ if (str)
+ sprintf(str, "%s %s %s", lstr, op, rstr);
break;
default:
@@ -2311,10 +2322,11 @@ static char *str_to_str(struct event_filter *filter, struct filter_arg *arg)
len = strlen(arg->str.field->name) + strlen(op) +
strlen(arg->str.val) + 6;
- str = malloc_or_die(len);
- snprintf(str, len, "%s %s \"%s\"",
- arg->str.field->name,
- op, arg->str.val);
+ str = malloc(len);
+ if (str) {
+ snprintf(str, len, "%s %s \"%s\"",
+ arg->str.field->name, op, arg->str.val);
+ }
break;
default:
@@ -2330,7 +2342,9 @@ static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg)
switch (arg->type) {
case FILTER_ARG_BOOLEAN:
- str = malloc_or_die(6);
+ str = malloc(6);
+ if (str == NULL)
+ return NULL;
if (arg->boolean.value)
strcpy(str, "TRUE");
else
@@ -2369,7 +2383,7 @@ static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg)
*
* Returns a string that displays the filter contents.
* This string must be freed with free(str).
- * NULL is returned if no filter is found.
+ * NULL is returned if no filter is found or allocation failed.
*/
char *
pevent_filter_make_string(struct event_filter *filter, int event_id)
--
1.7.11.7
--
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