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

[cascardo/linux.git] / tools / perf / util / trace-event-info.c

diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index 090e80d..3917eb9 100644 (file)
--- 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