4 * Builtin inject command: Examine the live mode (stdin) event stream
5 * and repipe it to stdout while optionally injecting additional
11 #include "util/session.h"
12 #include "util/debug.h"
14 #include "util/parse-options.h"
16 static char const *input_name = "-";
17 static bool inject_build_ids;
19 static int perf_event__repipe_synth(union perf_event *event,
20 struct perf_session *session __used)
25 size = event->header.size;
28 int ret = write(STDOUT_FILENO, buf, size);
39 static int perf_event__repipe(union perf_event *event,
40 struct perf_sample *sample __used,
41 struct perf_session *session)
43 return perf_event__repipe_synth(event, session);
46 static int perf_event__repipe_mmap(union perf_event *event,
47 struct perf_sample *sample,
48 struct perf_session *session)
52 err = perf_event__process_mmap(event, sample, session);
53 perf_event__repipe(event, sample, session);
58 static int perf_event__repipe_task(union perf_event *event,
59 struct perf_sample *sample,
60 struct perf_session *session)
64 err = perf_event__process_task(event, sample, session);
65 perf_event__repipe(event, sample, session);
70 static int perf_event__repipe_tracing_data(union perf_event *event,
71 struct perf_session *session)
75 perf_event__repipe_synth(event, session);
76 err = perf_event__process_tracing_data(event, session);
81 static int dso__read_build_id(struct dso *self)
83 if (self->has_build_id)
86 if (filename__read_build_id(self->long_name, self->build_id,
87 sizeof(self->build_id)) > 0) {
88 self->has_build_id = true;
95 static int dso__inject_build_id(struct dso *self, struct perf_session *session)
97 u16 misc = PERF_RECORD_MISC_USER;
98 struct machine *machine;
101 if (dso__read_build_id(self) < 0) {
102 pr_debug("no build_id found for %s\n", self->long_name);
106 machine = perf_session__find_host_machine(session);
107 if (machine == NULL) {
108 pr_err("Can't find machine for session\n");
113 misc = PERF_RECORD_MISC_KERNEL;
115 err = perf_event__synthesize_build_id(self, misc, perf_event__repipe,
118 pr_err("Can't synthesize build_id event for %s\n", self->long_name);
125 static int perf_event__inject_buildid(union perf_event *event,
126 struct perf_sample *sample,
127 struct perf_session *session)
129 struct addr_location al;
130 struct thread *thread;
133 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
135 thread = perf_session__findnew(session, event->ip.pid);
136 if (thread == NULL) {
137 pr_err("problem processing %d event, skipping it.\n",
142 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
143 event->ip.pid, event->ip.ip, &al);
145 if (al.map != NULL) {
146 if (!al.map->dso->hit) {
147 al.map->dso->hit = 1;
148 if (map__load(al.map, NULL) >= 0) {
149 dso__inject_build_id(al.map->dso, session);
151 * If this fails, too bad, let the other side
152 * account this as unresolved.
155 pr_warning("no symbols found in %s, maybe "
156 "install a debug package?\n",
157 al.map->dso->long_name);
162 perf_event__repipe(event, sample, session);
166 struct perf_event_ops inject_ops = {
167 .sample = perf_event__repipe,
168 .mmap = perf_event__repipe,
169 .comm = perf_event__repipe,
170 .fork = perf_event__repipe,
171 .exit = perf_event__repipe,
172 .lost = perf_event__repipe,
173 .read = perf_event__repipe,
174 .throttle = perf_event__repipe,
175 .unthrottle = perf_event__repipe,
176 .attr = perf_event__repipe_synth,
177 .event_type = perf_event__repipe_synth,
178 .tracing_data = perf_event__repipe_synth,
179 .build_id = perf_event__repipe_synth,
182 extern volatile int session_done;
184 static void sig_handler(int sig __attribute__((__unused__)))
189 static int __cmd_inject(void)
191 struct perf_session *session;
194 signal(SIGINT, sig_handler);
196 if (inject_build_ids) {
197 inject_ops.sample = perf_event__inject_buildid;
198 inject_ops.mmap = perf_event__repipe_mmap;
199 inject_ops.fork = perf_event__repipe_task;
200 inject_ops.tracing_data = perf_event__repipe_tracing_data;
203 session = perf_session__new(input_name, O_RDONLY, false, true, &inject_ops);
207 ret = perf_session__process_events(session, &inject_ops);
209 perf_session__delete(session);
214 static const char * const report_usage[] = {
215 "perf inject [<options>]",
219 static const struct option options[] = {
220 OPT_BOOLEAN('b', "build-ids", &inject_build_ids,
221 "Inject build-ids into the output stream"),
222 OPT_INCR('v', "verbose", &verbose,
223 "be more verbose (show build ids, etc)"),
227 int cmd_inject(int argc, const char **argv, const char *prefix __used)
229 argc = parse_options(argc, argv, options, report_usage, 0);
232 * Any (unrecognized) arguments left?
235 usage_with_options(report_usage, options);
237 if (symbol__init() < 0)
240 return __cmd_inject();