perf util: Move debugfs/tracing helper functions to util.c
Since they're generic helpers move them to util.c so that they can be
used by others.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1372230862-15861-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 59d868a..9a06584 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -269,3 +269,62 @@
snprintf(debugfs_mountpoint, strlen(debugfs_mountpoint), "%s", mntpt);
set_tracing_events_path(mntpt);
}
+
+static const char *find_debugfs(void)
+{
+ const char *path = perf_debugfs_mount(NULL);
+
+ if (!path)
+ fprintf(stderr, "Your kernel does not support the debugfs filesystem");
+
+ return path;
+}
+
+/*
+ * Finds the path to the debugfs/tracing
+ * Allocates the string and stores it.
+ */
+const char *find_tracing_dir(void)
+{
+ static char *tracing;
+ static int tracing_found;
+ const char *debugfs;
+
+ if (tracing_found)
+ return tracing;
+
+ debugfs = find_debugfs();
+ if (!debugfs)
+ return NULL;
+
+ tracing = malloc(strlen(debugfs) + 9);
+ if (!tracing)
+ return NULL;
+
+ sprintf(tracing, "%s/tracing", debugfs);
+
+ tracing_found = 1;
+ return tracing;
+}
+
+char *get_tracing_file(const char *name)
+{
+ const char *tracing;
+ char *file;
+
+ tracing = find_tracing_dir();
+ if (!tracing)
+ return NULL;
+
+ file = malloc(strlen(tracing) + strlen(name) + 2);
+ if (!file)
+ return NULL;
+
+ sprintf(file, "%s/%s", tracing, name);
+ return file;
+}
+
+void put_tracing_file(char *file)
+{
+ free(file);
+}