[PATCH 2/4] tools lib traceevent: Use calloc were applicable

Arnaldo Carvalho de Melo
2012-09-17T20:51:01Z

From: Arnaldo Carvalho de Melo <acme@redhat.com>

Replacing the equivalent open coded malloc + memset bits.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-598fjtjbzal4wxh7fp0yv0q1@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/lib/traceevent/event-parse.c | 44 ++++++++++++------------------------
1 file changed, 14 insertions(+), 30 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 278f989..5e38d2f 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -117,14 +117,7 @@ void breakpoint(void)

struct print_arg *alloc_arg(void)
{
- struct print_arg *arg;
-
- arg = malloc_or_die(sizeof(*arg));
- if (!arg)
- return NULL;
- memset(arg, 0, sizeof(*arg));
-
- return arg;
+ return calloc(1, sizeof(struct print_arg));
}

struct cmdline {
@@ -619,14 +612,7 @@ void pevent_print_printk(struct pevent *pevent)

static struct event_format *alloc_event(void)
{
- struct event_format *event;
-
- event = malloc(sizeof(*event));
- if (!event)
- return NULL;
- memset(event, 0, sizeof(*event));
-
- return event;
+ return calloc(1, sizeof(struct event_format));
}

static void add_event(struct pevent *pevent, struct event_format *event)
@@ -1240,8 +1226,10 @@ static int event_read_fields(struct event_format *event, struct format_field **f

last_token = token;

- field = malloc_or_die(sizeof(*field));
- memset(field, 0, sizeof(*field));
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto fail;
+
field->event = event;

/* read the rest of the type */
@@ -2179,8 +2167,9 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;

- field = malloc_or_die(sizeof(*field));
- memset(field, 0, sizeof(*field));
+ field = calloc(1, sizeof(*field));
+ if (!field)
+ goto out_free;

value = arg_eval(arg);
if (value == NULL)
@@ -5098,12 +5087,11 @@ int pevent_register_print_function(struct pevent *pevent,
remove_func_handler(pevent, name);
}

- func_handle = malloc(sizeof(*func_handle));
+ func_handle = calloc(1, sizeof(*func_handle));
if (!func_handle) {
do_warning("Failed to allocate function handler");
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
}
- memset(func_handle, 0, sizeof(*func_handle));

func_handle->ret_type = ret_type;
func_handle->name = strdup(name);
@@ -5202,13 +5190,12 @@ int pevent_register_event_handler(struct pevent *pevent,

not_found:
/* Save for later use. */
- handle = malloc(sizeof(*handle));
+ handle = calloc(1, sizeof(*handle));
if (!handle) {
do_warning("Failed to allocate event handler");
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
}

- memset(handle, 0, sizeof(*handle));
handle->id = id;
if (event_name)
handle->event_name = strdup(event_name);
@@ -5237,13 +5224,10 @@ int pevent_register_event_handler(struct pevent *pevent,
*/
struct pevent *pevent_alloc(void)
{
- struct pevent *pevent;
+ struct pevent *pevent = calloc(1, sizeof(*pevent));

- pevent = malloc(sizeof(*pevent));
- if (!pevent)
- return NULL;
- memset(pevent, 0, sizeof(*pevent));
- pevent->ref_count = 1;
+ if (pevent)
+ pevent->ref_count = 1;

return pevent;
}
--
1.7.9.2.358.g22243