perf timechart: Use zalloc and fix a couple leaks

Use zalloc for the malloc+memset open coded sequence.

Fix leak on the #ifdef'ed C state handling and when detecting invalid
data in p_state_change().

Cc: Arjan van de Ven <arjan@linux.intel.com>
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>
Link: http://lkml.kernel.org/n/tip-v9x3q9rv4caxtox7wtjpchq5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 14 insertions, 26 deletions

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 55a3a6c6b9e7..b1a8a3b841cc 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -168,9 +168,8 @@ static struct per_pid *find_create_pid(int pid)
                         return cursor;
                 cursor = cursor->next;
         }
-        cursor = malloc(sizeof(struct per_pid));
+        cursor = zalloc(sizeof(*cursor));
         assert(cursor != NULL);
-        memset(cursor, 0, sizeof(struct per_pid));
         cursor->pid = pid;
         cursor->next = all_data;
         all_data = cursor;
@@ -195,9 +194,8 @@ static void pid_set_comm(int pid, char *comm)
                 }
                 c = c->next;
         }
-        c = malloc(sizeof(struct per_pidcomm));
+        c = zalloc(sizeof(*c));
         assert(c != NULL);
-        memset(c, 0, sizeof(struct per_pidcomm));
         c->comm = strdup(comm);
         p->current = c;
         c->next = p->all;
@@ -239,17 +237,15 @@ pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
         p = find_create_pid(pid);
         c = p->current;
         if (!c) {
-                c = malloc(sizeof(struct per_pidcomm));
+                c = zalloc(sizeof(*c));
                 assert(c != NULL);
-                memset(c, 0, sizeof(struct per_pidcomm));
                 p->current = c;
                 c->next = p->all;
                 p->all = c;
         }
 
-        sample = malloc(sizeof(struct cpu_sample));
+        sample = zalloc(sizeof(*sample));
         assert(sample != NULL);
-        memset(sample, 0, sizeof(struct cpu_sample));
         sample->start_time = start;
         sample->end_time = end;
         sample->type = type;
@@ -373,11 +369,10 @@ static void c_state_start(int cpu, u64 timestamp, int state)
 
 static void c_state_end(int cpu, u64 timestamp)
 {
-        struct power_event *pwr;
-        pwr = malloc(sizeof(struct power_event));
+        struct power_event *pwr = zalloc(sizeof(*pwr));
+
         if (!pwr)
                 return;
-        memset(pwr, 0, sizeof(struct power_event));
 
         pwr->state = cpus_cstate_state[cpu];
         pwr->start_time = cpus_cstate_start_times[cpu];
@@ -392,14 +387,13 @@ static void c_state_end(int cpu, u64 timestamp)
 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 {
         struct power_event *pwr;
-        pwr = malloc(sizeof(struct power_event));
 
         if (new_freq > 8000000) /* detect invalid data */
                 return;
 
+        pwr = zalloc(sizeof(*pwr));
         if (!pwr)
                 return;
-        memset(pwr, 0, sizeof(struct power_event));
 
         pwr->state = cpus_pstate_state[cpu];
         pwr->start_time = cpus_pstate_start_times[cpu];
@@ -429,15 +423,13 @@ static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 static void
 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 {
-        struct wake_event *we;
         struct per_pid *p;
         struct wakeup_entry *wake = (void *)te;
+        struct wake_event *we = zalloc(sizeof(*we));
 
-        we = malloc(sizeof(struct wake_event));
         if (!we)
                 return;
 
-        memset(we, 0, sizeof(struct wake_event));
         we->time = timestamp;
         we->waker = pid;
 
@@ -579,13 +571,12 @@ static void end_sample_processing(void)
         struct power_event *pwr;
 
         for (cpu = 0; cpu <= numcpus; cpu++) {
-                pwr = malloc(sizeof(struct power_event));
+                /* C state */
+#if 0
+                pwr = zalloc(sizeof(*pwr));
                 if (!pwr)
                         return;
-                memset(pwr, 0, sizeof(struct power_event));
 
-                /* C state */
-#if 0
                 pwr->state = cpus_cstate_state[cpu];
                 pwr->start_time = cpus_cstate_start_times[cpu];
                 pwr->end_time = last_time;
@@ -597,10 +588,9 @@ static void end_sample_processing(void)
 #endif
                 /* P state */
 
-                pwr = malloc(sizeof(struct power_event));
+                pwr = zalloc(sizeof(*pwr));
                 if (!pwr)
                         return;
-                memset(pwr, 0, sizeof(struct power_event));
 
                 pwr->state = cpus_pstate_state[cpu];
                 pwr->start_time = cpus_pstate_start_times[cpu];
@@ -830,11 +820,9 @@ static void draw_process_bars(void)
 
 static void add_process_filter(const char *string)
 {
-        struct process_filter *filt;
-        int pid;
+        int pid = strtoull(string, NULL, 10);
+        struct process_filter *filt = malloc(sizeof(*filt));
 
-        pid = strtoull(string, NULL, 10);
-        filt = malloc(sizeof(struct process_filter));
         if (!filt)
                 return;