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8#include "builtin.h"
9
10#include "perf.h"
11#include "util/session.h"
12#include "util/debug.h"
13
14#include "util/parse-options.h"
15
16static char const *input_name = "-";
17static bool inject_build_ids;
18
19static int perf_event__repipe_synth(union perf_event *event,
20 struct perf_session *session __used)
21{
22 uint32_t size;
23 void *buf = event;
24
25 size = event->header.size;
26
27 while (size) {
28 int ret = write(STDOUT_FILENO, buf, size);
29 if (ret < 0)
30 return -errno;
31
32 size -= ret;
33 buf += ret;
34 }
35
36 return 0;
37}
38
39static int perf_event__repipe(union perf_event *event,
40 struct perf_sample *sample __used,
41 struct perf_session *session)
42{
43 return perf_event__repipe_synth(event, session);
44}
45
46static int perf_event__repipe_sample(union perf_event *event,
47 struct perf_sample *sample __used,
48 struct perf_evsel *evsel __used,
49 struct perf_session *session)
50{
51 return perf_event__repipe_synth(event, session);
52}
53
54static int perf_event__repipe_mmap(union perf_event *event,
55 struct perf_sample *sample,
56 struct perf_session *session)
57{
58 int err;
59
60 err = perf_event__process_mmap(event, sample, session);
61 perf_event__repipe(event, sample, session);
62
63 return err;
64}
65
66static int perf_event__repipe_task(union perf_event *event,
67 struct perf_sample *sample,
68 struct perf_session *session)
69{
70 int err;
71
72 err = perf_event__process_task(event, sample, session);
73 perf_event__repipe(event, sample, session);
74
75 return err;
76}
77
78static int perf_event__repipe_tracing_data(union perf_event *event,
79 struct perf_session *session)
80{
81 int err;
82
83 perf_event__repipe_synth(event, session);
84 err = perf_event__process_tracing_data(event, session);
85
86 return err;
87}
88
89static int dso__read_build_id(struct dso *self)
90{
91 if (self->has_build_id)
92 return 0;
93
94 if (filename__read_build_id(self->long_name, self->build_id,
95 sizeof(self->build_id)) > 0) {
96 self->has_build_id = true;
97 return 0;
98 }
99
100 return -1;
101}
102
103static int dso__inject_build_id(struct dso *self, struct perf_session *session)
104{
105 u16 misc = PERF_RECORD_MISC_USER;
106 struct machine *machine;
107 int err;
108
109 if (dso__read_build_id(self) < 0) {
110 pr_debug("no build_id found for %s\n", self->long_name);
111 return -1;
112 }
113
114 machine = perf_session__find_host_machine(session);
115 if (machine == NULL) {
116 pr_err("Can't find machine for session\n");
117 return -1;
118 }
119
120 if (self->kernel)
121 misc = PERF_RECORD_MISC_KERNEL;
122
123 err = perf_event__synthesize_build_id(self, misc, perf_event__repipe,
124 machine, session);
125 if (err) {
126 pr_err("Can't synthesize build_id event for %s\n", self->long_name);
127 return -1;
128 }
129
130 return 0;
131}
132
133static int perf_event__inject_buildid(union perf_event *event,
134 struct perf_sample *sample,
135 struct perf_evsel *evsel __used,
136 struct perf_session *session)
137{
138 struct addr_location al;
139 struct thread *thread;
140 u8 cpumode;
141
142 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
143
144 thread = perf_session__findnew(session, event->ip.pid);
145 if (thread == NULL) {
146 pr_err("problem processing %d event, skipping it.\n",
147 event->header.type);
148 goto repipe;
149 }
150
151 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
152 event->ip.pid, event->ip.ip, &al);
153
154 if (al.map != NULL) {
155 if (!al.map->dso->hit) {
156 al.map->dso->hit = 1;
157 if (map__load(al.map, NULL) >= 0) {
158 dso__inject_build_id(al.map->dso, session);
159
160
161
162
163 } else
164 pr_warning("no symbols found in %s, maybe "
165 "install a debug package?\n",
166 al.map->dso->long_name);
167 }
168 }
169
170repipe:
171 perf_event__repipe(event, sample, session);
172 return 0;
173}
174
175struct perf_event_ops inject_ops = {
176 .sample = perf_event__repipe_sample,
177 .mmap = perf_event__repipe,
178 .comm = perf_event__repipe,
179 .fork = perf_event__repipe,
180 .exit = perf_event__repipe,
181 .lost = perf_event__repipe,
182 .read = perf_event__repipe,
183 .throttle = perf_event__repipe,
184 .unthrottle = perf_event__repipe,
185 .attr = perf_event__repipe_synth,
186 .event_type = perf_event__repipe_synth,
187 .tracing_data = perf_event__repipe_synth,
188 .build_id = perf_event__repipe_synth,
189};
190
191extern volatile int session_done;
192
193static void sig_handler(int sig __attribute__((__unused__)))
194{
195 session_done = 1;
196}
197
198static int __cmd_inject(void)
199{
200 struct perf_session *session;
201 int ret = -EINVAL;
202
203 signal(SIGINT, sig_handler);
204
205 if (inject_build_ids) {
206 inject_ops.sample = perf_event__inject_buildid;
207 inject_ops.mmap = perf_event__repipe_mmap;
208 inject_ops.fork = perf_event__repipe_task;
209 inject_ops.tracing_data = perf_event__repipe_tracing_data;
210 }
211
212 session = perf_session__new(input_name, O_RDONLY, false, true, &inject_ops);
213 if (session == NULL)
214 return -ENOMEM;
215
216 ret = perf_session__process_events(session, &inject_ops);
217
218 perf_session__delete(session);
219
220 return ret;
221}
222
223static const char * const report_usage[] = {
224 "perf inject [<options>]",
225 NULL
226};
227
228static const struct option options[] = {
229 OPT_BOOLEAN('b', "build-ids", &inject_build_ids,
230 "Inject build-ids into the output stream"),
231 OPT_INCR('v', "verbose", &verbose,
232 "be more verbose (show build ids, etc)"),
233 OPT_END()
234};
235
236int cmd_inject(int argc, const char **argv, const char *prefix __used)
237{
238 argc = parse_options(argc, argv, options, report_usage, 0);
239
240
241
242
243 if (argc)
244 usage_with_options(report_usage, options);
245
246 if (symbol__init() < 0)
247 return -1;
248
249 return __cmd_inject();
250}
251
