perf report: Implement initial UI using newt

Newt has widespread availability and provides a rather simple
API as can be seen by the size of this patch.

The work needed to support it will benefit other frontends too.

In this initial patch it just checks if the output is a tty, if
not it falls back to the previous behaviour, also if
newt-devel/libnewt-dev is not installed the previous behaviour
is maintaned.

Pressing enter on a symbol will annotate it, ESC in the
annotation window will return to the report symbol list.

More work will be done to remove the special casing in
color_fprintf, stop using fmemopen/FILE in the printing of
hist_entries, etc.

Also the annotation doesn't need to be done via spawning "perf
annotate" and then browsing its output, we can do better by
calling directly the builtin-annotate.c functions, that would
then be moved to tools/perf/util/annotate.c and shared with perf
top, etc

But lets go by baby steps, this patch already improves perf
usability by allowing to quickly do annotations on symbols from
the report screen and provides a first experimentation with
libnewt/TUI integration of tools.

Tested on RHEL5 and Fedora12 X86_64 and on Debian PARISC64 to
browse a perf.data file collected on a Fedora12 x86_64 box.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Avi Kivity <avi@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: <1268349164-5822-5-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 5c33417eebb3..34d73395baac 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -86,4 +86,13 @@ static inline struct map *
 {
         return map_groups__new_module(&self->kmaps, start, filename);
 }
+
+#ifdef NO_NEWT_SUPPORT
+static inline void perf_session__browse_hists(struct rb_root *hists __used,
+                                              u64 session_total __used,
+                                              const char *helpline __used) {}
+#else
+void perf_session__browse_hists(struct rb_root *hists, u64 session_total,
+                                const char *helpline);
+#endif
 #endif /* __PERF_SESSION_H */