perf buildid-list: Introduce --with-hits option

Using this option 'perf buildid-list' will process all samples,
marking the DSOs that had some hits to list just them.

This in turn will be used by a new porcelain, 'perf archive',
that will be just a shell script to create a tarball from the
'perf buildid-list --with-hits' output and the files cached by
'perf record' in ~/.debug.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1263519930-22803-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 4 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 4267138c7bbe..a4e745934584 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1716,22 +1716,25 @@ void dsos__fprintf(FILE *fp)
         __dsos__fprintf(&dsos__user, fp);
 }
 
-static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp)
+static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
+                                      bool with_hits)
 {
         struct dso *pos;
         size_t ret = 0;
 
         list_for_each_entry(pos, head, node) {
+                if (with_hits && !pos->hit)
+                        continue;
                 ret += dso__fprintf_buildid(pos, fp);
                 ret += fprintf(fp, " %s\n", pos->long_name);
         }
         return ret;
 }
 
-size_t dsos__fprintf_buildid(FILE *fp)
+size_t dsos__fprintf_buildid(FILE *fp, bool with_hits)
 {
-        return (__dsos__fprintf_buildid(&dsos__kernel, fp) +
-                __dsos__fprintf_buildid(&dsos__user, fp));
+        return (__dsos__fprintf_buildid(&dsos__kernel, fp, with_hits) +
+                __dsos__fprintf_buildid(&dsos__user, fp, with_hits));
 }
 
 static struct dso *dsos__create_kernel(const char *vmlinux)