perf event: Introduce perf_event__fprintf

So that tools like 'perf test' can print the events when in verbose
mode, for instance.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xnovdqfi25nc48gy6604k7yp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 54 insertions, 6 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 0ebbe764133..97c479bcb0d 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -433,6 +433,11 @@ int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
         return err;
 }
 
+size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
+{
+        return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
+}
+
 int perf_event__process_comm(struct perf_tool *tool __used,
                              union perf_event *event,
                              struct perf_sample *sample __used,
@@ -440,7 +445,8 @@ int perf_event__process_comm(struct perf_tool *tool __used,
 {
         struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
 
-        dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
+        if (dump_trace)
+                perf_event__fprintf_comm(event, stdout);
 
         if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
@@ -566,6 +572,13 @@ out_problem:
         return -1;
 }
 
+size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
+{
+        return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
+                       event->mmap.pid, event->mmap.tid, event->mmap.start,
+                       event->mmap.len, event->mmap.pgoff, event->mmap.filename);
+}
+
 int perf_event__process_mmap(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample __used,
@@ -576,9 +589,8 @@ int perf_event__process_mmap(struct perf_tool *tool,
         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
         int ret = 0;
 
-        dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
-                        event->mmap.pid, event->mmap.tid, event->mmap.start,
-                        event->mmap.len, event->mmap.pgoff, event->mmap.filename);
+        if (dump_trace)
+                perf_event__fprintf_mmap(event, stdout);
 
         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
             cpumode == PERF_RECORD_MISC_KERNEL) {
@@ -606,6 +618,13 @@ out_problem:
         return 0;
 }
 
+size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
+{
+        return fprintf(fp, "(%d:%d):(%d:%d)\n",
+                       event->fork.pid, event->fork.tid,
+                       event->fork.ppid, event->fork.ptid);
+}
+
 int perf_event__process_task(struct perf_tool *tool __used,
                              union perf_event *event,
                              struct perf_sample *sample __used,
@@ -614,8 +633,8 @@ int perf_event__process_task(struct perf_tool *tool __used,
         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
         struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
 
-        dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
-                    event->fork.ppid, event->fork.ptid);
+        if (dump_trace)
+                perf_event__fprintf_task(event, stdout);
 
         if (event->header.type == PERF_RECORD_EXIT) {
                 machine__remove_thread(machine, thread);
@@ -631,6 +650,29 @@ int perf_event__process_task(struct perf_tool *tool __used,
         return 0;
 }
 
+size_t perf_event__fprintf(union perf_event *event, FILE *fp)
+{
+        size_t ret = fprintf(fp, "PERF_RECORD_%s",
+                             perf_event__name(event->header.type));
+
+        switch (event->header.type) {
+        case PERF_RECORD_COMM:
+                ret += perf_event__fprintf_comm(event, fp);
+                break;
+        case PERF_RECORD_FORK:
+        case PERF_RECORD_EXIT:
+                ret += perf_event__fprintf_task(event, fp);
+                break;
+        case PERF_RECORD_MMAP:
+                ret += perf_event__fprintf_mmap(event, fp);
+                break;
+        default:
+                ret += fprintf(fp, "\n");
+        }
+
+        return ret;
+}
+
 int perf_event__process(struct perf_tool *tool, union perf_event *event,
                         struct perf_sample *sample, struct machine *machine)
 {
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d8499e7cf64..0d80201ce84 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -2,6 +2,7 @@
 #define __PERF_RECORD_H
 
 #include <limits.h>
+#include <stdio.h>
 
 #include "../perf.h"
 #include "map.h"
@@ -199,4 +200,9 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
                              int sample_size, bool sample_id_all,
                              struct perf_sample *sample, bool swapped);
 
+size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf(union perf_event *event, FILE *fp);
+
 #endif /* __PERF_RECORD_H */