perf probe: Fix to show which probe point is not found

Fix perf probe to show which probe point is not found.
With out this patch, it shows just "No probe point found."
This doesn't help users if they specify several probes.
e.g.

 # perf probe -f --add schedule --add test
  Fatal: No probe point found.

This patch makes error message more helpful as below.

 # perf probe --add schedule --add test
  Fatal: Probe point 'test' not found. - probe not added.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091215153247.17436.49068.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 2 deletions

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 6b0e4cf322d8..520b064b46d8 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -265,8 +265,11 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
                 ret = find_probepoint(fd, pp);
                 if (ret > 0)
                         continue;
-                if (ret == 0)   /* No error but failed to find probe point. */
-                        die("No probe point found.");
+                if (ret == 0) { /* No error but failed to find probe point. */
+                        synthesize_perf_probe_point(pp);
+                        die("Probe point '%s' not found. - probe not added.",
+                            pp->probes[0]);
+                }
                 /* Error path */
                 if (session.need_dwarf) {
                         if (ret == -ENOENT)