perf report: Delay sample_type checks in pipe mode

The pipeline:
  perf record -a -g -o - sleep 5 |perf inject -v -b  | perf report  -g -i -

generates the warning:
  Selected -g but no callchain data. Did you call 'perf record' without -g?

The problem is that the header data is not written to the pipe, so the
sample_type has not been available when perf_report__setup_sample_type
is called. For pipe mode, record dumps the sample type as part of the
synthesized events stream -- perf_event__synthesize_attrs(). Handle this
be detecting pipe mode and not doing early sanity checks on sample_type.

Signed-off-by: David Ahern <dsahern@gmail.com>
Tested-by: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Link: http://lkml.kernel.org/r/1339444121-26236-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 40b0ffc3ad3b..69b1c1185159 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -245,11 +245,12 @@ static int process_read_event(struct perf_tool *tool,
         return 0;
 }
 
+/* For pipe mode, sample_type is not currently set */
 static int perf_report__setup_sample_type(struct perf_report *rep)
 {
         struct perf_session *self = rep->session;
 
-        if (!(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
+        if (!self->fd_pipe && !(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
                 if (sort__has_parent) {
                         ui__error("Selected --sort parent, but no "
                                     "callchain data. Did you call "
@@ -272,7 +273,8 @@ static int perf_report__setup_sample_type(struct perf_report *rep)
         }
 
         if (sort__branch_mode == 1) {
-                if (!(self->sample_type & PERF_SAMPLE_BRANCH_STACK)) {
+                if (!self->fd_pipe &&
+                    !(self->sample_type & PERF_SAMPLE_BRANCH_STACK)) {
                         ui__error("Selected -b but no branch data. "
                                   "Did you call perf record without -b?\n");
                         return -1;