perf tools: Convert open coded equivalents to asprintf()

The following snippet
	V = malloc(S);
	if (!V) { }
	sprintf(V, ...)

Can be easily changed to a one line:

	if (asprintf(&V, ...) < 0) { }

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Link: http://lkml.kernel.org/r/1404474229-15272-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 5 insertions, 16 deletions

diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index 7e6fcfe8b438..c3bba883f5c3 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -191,12 +191,10 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps)
                     strcmp(dent->d_name, "..") == 0 ||
                     !name_in_tp_list(dent->d_name, tps))
                         continue;
-                format = malloc(strlen(sys) + strlen(dent->d_name) + 10);
-                if (!format) {
+                if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
                         err = -ENOMEM;
                         goto out;
                 }
-                sprintf(format, "%s/%s/format", sys, dent->d_name);
                 ret = stat(format, &st);
                 free(format);
                 if (ret < 0)
@@ -217,12 +215,10 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps)
                     strcmp(dent->d_name, "..") == 0 ||
                     !name_in_tp_list(dent->d_name, tps))
                         continue;
-                format = malloc(strlen(sys) + strlen(dent->d_name) + 10);
-                if (!format) {
+                if (asprintf(&format, "%s/%s/format", sys, dent->d_name) < 0) {
                         err = -ENOMEM;
                         goto out;
                 }
-                sprintf(format, "%s/%s/format", sys, dent->d_name);
                 ret = stat(format, &st);
 
                 if (ret >= 0) {
@@ -317,12 +313,10 @@ static int record_event_files(struct tracepoint_path *tps)
                     strcmp(dent->d_name, "ftrace") == 0 ||
                     !system_in_tp_list(dent->d_name, tps))
                         continue;
-                sys = malloc(strlen(path) + strlen(dent->d_name) + 2);
-                if (!sys) {
+                if (asprintf(&sys, "%s/%s", path, dent->d_name) < 0) {
                         err = -ENOMEM;
                         goto out;
                 }
-                sprintf(sys, "%s/%s", path, dent->d_name);
                 ret = stat(sys, &st);
                 if (ret >= 0) {
                         ssize_t size = strlen(dent->d_name) + 1;
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 95aefa78bb07..e4132aeeb780 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -333,12 +333,9 @@ const char *find_tracing_dir(void)
         if (!debugfs)
                 return NULL;
 
-        tracing = malloc(strlen(debugfs) + 9);
-        if (!tracing)
+        if (asprintf(&tracing, "%s/tracing", debugfs) < 0)
                 return NULL;
 
-        sprintf(tracing, "%s/tracing", debugfs);
-
         tracing_found = 1;
         return tracing;
 }
@@ -352,11 +349,9 @@ char *get_tracing_file(const char *name)
         if (!tracing)
                 return NULL;
 
-        file = malloc(strlen(tracing) + strlen(name) + 2);
-        if (!file)
+        if (asprintf(&file, "%s/%s", tracing, name) < 0)
                 return NULL;
 
-        sprintf(file, "%s/%s", tracing, name);
         return file;
 }