perf tools: Get rid of die() calls from trace-event-info.c

Now remove all remaining die() calls and convert them to check return
value and propagate it.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1363850332-25297-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 72 insertions, 42 deletions

diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index 090e80d743db..3917eb9a8479 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -43,7 +43,6 @@
 
 #define VERSION "0.5"
 
-static const char *output_file = "trace.info";
 static int output_fd;
 
 
@@ -125,8 +124,10 @@ static int record_file(const char *file, ssize_t hdr_sz)
         int err = -EIO;
 
         fd = open(file, O_RDONLY);
-        if (fd < 0)
-                die("Can't read '%s'", file);
+        if (fd < 0) {
+                pr_debug("Can't read '%s'", file);
+                return -errno;
+        }
 
         /* put in zeros for file size, then fill true size later */
         if (hdr_sz) {
@@ -148,8 +149,10 @@ static int record_file(const char *file, ssize_t hdr_sz)
         if (bigendian())
                 sizep += sizeof(u64) - hdr_sz;
 
-        if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0)
-                die("writing to %s", output_file);
+        if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0) {
+                pr_debug("writing file size failed\n");
+                goto out;
+        }
 
         err = 0;
 out:
@@ -164,11 +167,15 @@ static int read_header_files(void)
         int err = -EIO;
 
         path = get_tracing_file("events/header_page");
-        if (!path)
-                die("can't get tracing/events/header_page");
+        if (!path) {
+                pr_debug("can't get tracing/events/header_page");
+                return -ENOMEM;
+        }
 
-        if (stat(path, &st) < 0)
-                die("can't read '%s'", path);
+        if (stat(path, &st) < 0) {
+                pr_debug("can't read '%s'", path);
+                goto out;
+        }
 
         if (write(output_fd, "header_page", 12) != 12) {
                 pr_debug("can't write header_page\n");
@@ -183,11 +190,16 @@ static int read_header_files(void)
         put_tracing_file(path);
 
         path = get_tracing_file("events/header_event");
-        if (!path)
-                die("can't get tracing/events/header_event");
+        if (!path) {
+                pr_debug("can't get tracing/events/header_event");
+                err = -ENOMEM;
+                goto out;
+        }
 
-        if (stat(path, &st) < 0)
-                die("can't read '%s'", path);
+        if (stat(path, &st) < 0) {
+                pr_debug("can't read '%s'", path);
+                goto out;
+        }
 
         if (write(output_fd, "header_event", 13) != 13) {
                 pr_debug("can't write header_event\n");
@@ -227,8 +239,10 @@ static int copy_event_system(const char *sys, struct tracepoint_path *tps)
         int err;
 
         dir = opendir(sys);
-        if (!dir)
-                die("can't read directory '%s'", sys);
+        if (!dir) {
+                pr_debug("can't read directory '%s'", sys);
+                return -errno;
+        }
 
         while ((dent = readdir(dir))) {
                 if (dent->d_type != DT_DIR ||
@@ -291,8 +305,10 @@ static int read_ftrace_files(struct tracepoint_path *tps)
         int ret;
 
         path = get_tracing_file("events/ftrace");
-        if (!path)
-                die("can't get tracing/events/ftrace");
+        if (!path) {
+                pr_debug("can't get tracing/events/ftrace");
+                return -ENOMEM;
+        }
 
         ret = copy_event_system(path, tps);
 
@@ -324,12 +340,17 @@ static int read_event_files(struct tracepoint_path *tps)
         int err;
 
         path = get_tracing_file("events");
-        if (!path)
-                die("can't get tracing/events");
+        if (!path) {
+                pr_debug("can't get tracing/events");
+                return -ENOMEM;
+        }
 
         dir = opendir(path);
-        if (!dir)
-                die("can't read directory '%s'", path);
+        if (!dir) {
+                err = -errno;
+                pr_debug("can't read directory '%s'", path);
+                goto out;
+        }
 
         while ((dent = readdir(dir))) {
                 if (dent->d_type != DT_DIR ||
@@ -408,8 +429,10 @@ static int read_ftrace_printk(void)
         int ret, err = 0;
 
         path = get_tracing_file("printk_formats");
-        if (!path)
-                die("can't get tracing/printk_formats");
+        if (!path) {
+                pr_debug("can't get tracing/printk_formats");
+                return -ENOMEM;
+        }
 
         ret = stat(path, &st);
         if (ret < 0) {
@@ -426,6 +449,19 @@ out:
         return err;
 }
 
+static void
+put_tracepoints_path(struct tracepoint_path *tps)
+{
+        while (tps) {
+                struct tracepoint_path *t = tps;
+
+                tps = tps->next;
+                free(t->name);
+                free(t->system);
+                free(t);
+        }
+}
+
 static struct tracepoint_path *
 get_tracepoints_path(struct list_head *pattrs)
 {
@@ -438,27 +474,17 @@ get_tracepoints_path(struct list_head *pattrs)
                         continue;
                 ++nr_tracepoints;
                 ppath->next = tracepoint_id_to_path(pos->attr.config);
-                if (!ppath->next)
-                        die("%s\n", "No memory to alloc tracepoints list");
+                if (!ppath->next) {
+                        pr_debug("No memory to alloc tracepoints list\n");
+                        put_tracepoints_path(&path);
+                        return NULL;
+                }
                 ppath = ppath->next;
         }
 
         return nr_tracepoints > 0 ? path.next : NULL;
 }
 
-static void
-put_tracepoints_path(struct tracepoint_path *tps)
-{
-        while (tps) {
-                struct tracepoint_path *t = tps;
-
-                tps = tps->next;
-                free(t->name);
-                free(t->system);
-                free(t);
-        }
-}
-
 bool have_tracepoints(struct list_head *pattrs)
 {
         struct perf_evsel *pos;
@@ -536,12 +562,16 @@ struct tracing_data *tracing_data_get(struct list_head *pattrs,
 
                 snprintf(tdata->temp_file, sizeof(tdata->temp_file),
                          "/tmp/perf-XXXXXX");
-                if (!mkstemp(tdata->temp_file))
-                        die("Can't make temp file");
+                if (!mkstemp(tdata->temp_file)) {
+                        pr_debug("Can't make temp file");
+                        return NULL;
+                }
 
                 temp_fd = open(tdata->temp_file, O_RDWR);
-                if (temp_fd < 0)
-                        die("Can't read '%s'", tdata->temp_file);
+                if (temp_fd < 0) {
+                        pr_debug("Can't read '%s'", tdata->temp_file);
+                        return NULL;
+                }
 
                 /*
                  * Set the temp file the default output, so all the