tracing: Add kprobes event profiling interface

[pandora-kernel.git] / tools / perf / builtin-record.c

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6da0992..0345aad 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -412,6 +412,7 @@ static void create_counter(int counter, int cpu, pid_t pid)
        if (call_graph)
                attr->sample_type       |= PERF_SAMPLE_CALLCHAIN;
 
+
        attr->mmap              = track;
        attr->comm              = track;
        attr->inherit           = (cpu < 0) && inherit;
@@ -524,10 +525,14 @@ static int __cmd_record(int argc, const char **argv)
        signal(SIGCHLD, sig_handler);
        signal(SIGINT, sig_handler);
 
-       if (!stat(output_name, &st) && !force && !append_file) {
-               fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",
-                               output_name);
-               exit(-1);
+       if (!stat(output_name, &st) && st.st_size) {
+               if (!force && !append_file) {
+                       fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",
+                                       output_name);
+                       exit(-1);
+               }
+       } else {
+               append_file = 0;
        }
 
        flags = O_CREAT|O_RDWR;