[PATCH 4/7] perf tools: Use machine->pid for tgid if mahicne is guest.

[Dongsheng Yang]

When we synthesize an comm event, if machine is guest, we should
use the pid of machine as the event->comm.pid, rather than tgid
of thread.

Signed-off-by: Dongsheng Yang <yangds.fnst@xxxxxxxxxxxxxx>
---
 tools/perf/util/event.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 2d90ed8..93c6701 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -106,8 +106,12 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 
 	memset(&event->comm, 0, sizeof(event->comm));
 
-	tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
-					 sizeof(event->comm.comm));
+	if (machine__is_host(machine))
+		tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
+						 sizeof(event->comm.comm));
+	else
+		tgid = machine->pid;
+
 	if (tgid < 0)
 		goto out;
 
-- 
1.8.2.1

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