perf report: Print out raw events in hexa

Print out events in hexa dump format, when -D is specified:

0x4868 [0x48]: event: 1
.
. ... raw event: size 72 bytes
.  0000:  01 00 00 00 00 00 48 00 d4 72 00 00 d4 72 00 00  ......H..r...r.
.  0010:  00 00 40 f2 3e 00 00 00 00 30 01 00 00 00 00 00  ..@.>....0.....
.  0020:  00 00 00 00 00 00 00 00 2f 75 73 72 2f 6c 69 62  ......../usr/li
.  0030:  36 34 2f 6c 69 62 65 6c 66 2d 30 2e 31 34 31 2e  64/libelf-0.141
.  0040:  73 6f 00 00 00 00 00 00                          f-0.141
.
0x4868 [0x48]: PERF_EVENT_MMAP 29396: [0x3ef2400000(0x13000) @ (nil)]: /usr/lib64/libelf-0.141.so

This helps the debugging of mis-parsing of data files, and helps
the addition of new sample/trace formats.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 35 insertions, 1 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 82fa93b4db99..37515da637f7 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1095,9 +1095,43 @@ process_period_event(event_t *event, unsigned long offset, unsigned long head)
         return 0;
 }
 
+static void trace_event(event_t *event)
+{
+        unsigned char *raw_event = (void *)event;
+        int i, j;
+
+        if (!dump_trace)
+                return;
+
+        dprintf(".\n. ... raw event: size %d bytes\n", event->header.size);
+
+        for (i = 0; i < event->header.size; i++) {
+                if ((i & 15) == 0)
+                        dprintf(".  %04x: ", i);
+
+                dprintf(" %02x", raw_event[i]);
+
+                if (((i & 15) == 15) || i == event->header.size-1) {
+                        dprintf("  ");
+                        for (j = 0; j < 15-(i & 15); j++)
+                                dprintf("   ");
+                        for (j = 0; j < (i & 15); j++) {
+                                if (isprint(raw_event[i-15+j]))
+                                        dprintf("%c", raw_event[i-15+j]);
+                                else
+                                        dprintf(".");
+                        }
+                        dprintf("\n");
+                }
+        }
+        dprintf(".\n");
+}
+
 static int
 process_event(event_t *event, unsigned long offset, unsigned long head)
 {
+        trace_event(event);
+
         if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
                 return process_overflow_event(event, offset, head);
 
@@ -1204,7 +1238,7 @@ more:
 
         size = event->header.size;
 
-        dprintf("%p [%p]: event: %d\n",
+        dprintf("\n%p [%p]: event: %d\n",
                         (void *)(offset + head),
                         (void *)(long)event->header.size,
                         event->header.type);