[PATCH v7 6/8] perf tool: add script print support for namespace events

[Hari Bathini]

Add script print support for events of type PERF_RECORD_NAMESPACES.

Signed-off-by: Hari Bathini <hbath...@linux.vnet.ibm.com>
---
 tools/perf/builtin-script.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index f1ce806..66d62c9 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -830,6 +830,7 @@ struct perf_script {
        bool                    show_task_events;
        bool                    show_mmap_events;
        bool                    show_switch_events;
+       bool                    show_namespace_events;
        bool                    allocated;
        struct cpu_map          *cpus;
        struct thread_map       *threads;
@@ -1118,6 +1119,41 @@ static int process_comm_event(struct perf_tool *tool,
        return ret;
 }
 
+static int process_namespaces_event(struct perf_tool *tool,
+                                   union perf_event *event,
+                                   struct perf_sample *sample,
+                                   struct machine *machine)
+{
+       struct thread *thread;
+       struct perf_script *script = container_of(tool, struct perf_script, 
tool);
+       struct perf_session *session = script->session;
+       struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, 
sample->id);
+       int ret = -1;
+
+       thread = machine__findnew_thread(machine, event->namespaces.pid,
+                                        event->namespaces.tid);
+       if (thread == NULL) {
+               pr_debug("problem processing NAMESPACES event, skipping it.\n");
+               return -1;
+       }
+
+       if (perf_event__process_namespaces(tool, event, sample, machine) < 0)
+               goto out;
+
+       if (!evsel->attr.sample_id_all) {
+               sample->cpu = 0;
+               sample->time = 0;
+               sample->tid = event->namespaces.tid;
+               sample->pid = event->namespaces.pid;
+       }
+       print_sample_start(sample, thread, evsel);
+       perf_event__fprintf(event, stdout);
+       ret = 0;
+out:
+       thread__put(thread);
+       return ret;
+}
+
 static int process_fork_event(struct perf_tool *tool,
                              union perf_event *event,
                              struct perf_sample *sample,
@@ -1293,6 +1329,8 @@ static int __cmd_script(struct perf_script *script)
        }
        if (script->show_switch_events)
                script->tool.context_switch = process_switch_event;
+       if (script->show_namespace_events)
+               script->tool.namespaces = process_namespaces_event;
 
        ret = perf_session__process_events(script->session);
 
@@ -2181,6 +2219,8 @@ int cmd_script(int argc, const char **argv, const char 
*prefix __maybe_unused)
                    "Show the mmap events"),
        OPT_BOOLEAN('\0', "show-switch-events", &script.show_switch_events,
                    "Show context switch events (if recorded)"),
+       OPT_BOOLEAN('\0', "show-namespace-events", 
&script.show_namespace_events,
+                   "Show namespace events (if recorded)"),
        OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
        OPT_BOOLEAN(0, "ns", &nanosecs,
                    "Use 9 decimal places when displaying time"),