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Ingo Molnarabaff322009-06-02 22:59:57 +02001/*
Ingo Molnarbf9e1872009-06-02 23:37:05 +02002 * builtin-record.c
3 *
4 * Builtin record command: Record the profile of a workload
5 * (or a CPU, or a PID) into the perf.data output file - for
6 * later analysis via perf report.
Ingo Molnarabaff322009-06-02 22:59:57 +02007 */
Ingo Molnar16f762a2009-05-27 09:10:38 +02008#include "builtin.h"
Ingo Molnarbf9e1872009-06-02 23:37:05 +02009
10#include "perf.h"
11
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -020012#include "util/build-id.h"
Thomas Gleixner6eda5832009-05-01 18:29:57 +020013#include "util/util.h"
Ingo Molnar0e9b20b2009-05-26 09:17:18 +020014#include "util/parse-options.h"
Ingo Molnar8ad8db32009-05-26 11:10:09 +020015#include "util/parse-events.h"
Thomas Gleixner6eda5832009-05-01 18:29:57 +020016
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +020017#include "util/header.h"
Frederic Weisbecker66e274f2009-08-12 11:07:25 +020018#include "util/event.h"
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -020019#include "util/evlist.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020020#include "util/evsel.h"
Frederic Weisbecker8f288272009-08-16 22:05:48 +020021#include "util/debug.h"
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -020022#include "util/session.h"
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020023#include "util/tool.h"
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -020024#include "util/symbol.h"
Paul Mackerrasa12b51c2010-03-10 20:36:09 +110025#include "util/cpumap.h"
Arnaldo Carvalho de Melofd782602011-01-18 15:15:24 -020026#include "util/thread_map.h"
Jiri Olsaf5fc14122013-10-15 16:27:32 +020027#include "util/data.h"
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +020028
Peter Zijlstra97124d5e2009-06-02 15:52:24 +020029#include <unistd.h>
Peter Zijlstrade9ac072009-04-08 15:01:31 +020030#include <sched.h>
Arnaldo Carvalho de Meloa41794c2010-05-18 18:29:23 -030031#include <sys/mman.h>
Peter Zijlstrade9ac072009-04-08 15:01:31 +020032
Ingo Molnar89fe8082013-09-30 12:07:11 +020033#ifndef HAVE_ON_EXIT_SUPPORT
Bernhard Rosenkraenzer78da39f2012-10-08 09:43:26 +030034#ifndef ATEXIT_MAX
35#define ATEXIT_MAX 32
36#endif
37static int __on_exit_count = 0;
38typedef void (*on_exit_func_t) (int, void *);
39static on_exit_func_t __on_exit_funcs[ATEXIT_MAX];
40static void *__on_exit_args[ATEXIT_MAX];
41static int __exitcode = 0;
42static void __handle_on_exit_funcs(void);
43static int on_exit(on_exit_func_t function, void *arg);
44#define exit(x) (exit)(__exitcode = (x))
45
46static int on_exit(on_exit_func_t function, void *arg)
47{
48 if (__on_exit_count == ATEXIT_MAX)
49 return -ENOMEM;
50 else if (__on_exit_count == 0)
51 atexit(__handle_on_exit_funcs);
52 __on_exit_funcs[__on_exit_count] = function;
53 __on_exit_args[__on_exit_count++] = arg;
54 return 0;
55}
56
57static void __handle_on_exit_funcs(void)
58{
59 int i;
60 for (i = 0; i < __on_exit_count; i++)
61 __on_exit_funcs[i] (__exitcode, __on_exit_args[i]);
62}
63#endif
64
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -030065struct record {
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020066 struct perf_tool tool;
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -030067 struct record_opts opts;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020068 u64 bytes_written;
Jiri Olsaf5fc14122013-10-15 16:27:32 +020069 struct perf_data_file file;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020070 struct perf_evlist *evlist;
71 struct perf_session *session;
72 const char *progname;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020073 int realtime_prio;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020074 bool no_buildid;
75 bool no_buildid_cache;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020076 long samples;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -020077};
Ingo Molnara21ca2c2009-06-06 09:58:57 +020078
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -030079static int record__write(struct record *rec, void *bf, size_t size)
Peter Zijlstraf5970552009-06-18 23:22:55 +020080{
Arnaldo Carvalho de Melocf8b2e62013-12-19 14:26:26 -030081 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
Jiri Olsa50a9b862013-11-22 13:11:24 +010082 pr_err("failed to write perf data, error: %m\n");
83 return -1;
Peter Zijlstraf5970552009-06-18 23:22:55 +020084 }
David Ahern8d3eca22012-08-26 12:24:47 -060085
Arnaldo Carvalho de Melocf8b2e62013-12-19 14:26:26 -030086 rec->bytes_written += size;
David Ahern8d3eca22012-08-26 12:24:47 -060087 return 0;
Peter Zijlstraf5970552009-06-18 23:22:55 +020088}
89
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020090static int process_synthesized_event(struct perf_tool *tool,
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -020091 union perf_event *event,
Irina Tirdea1d037ca2012-09-11 01:15:03 +030092 struct perf_sample *sample __maybe_unused,
93 struct machine *machine __maybe_unused)
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -020094{
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -030095 struct record *rec = container_of(tool, struct record, tool);
96 return record__write(rec, event, event->header.size);
Arnaldo Carvalho de Melo234fbbf2009-10-26 19:23:18 -020097}
98
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -030099static int record__mmap_read(struct record *rec, struct perf_mmap *md)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200100{
Arnaldo Carvalho de Melo744bd8a2011-01-12 17:07:28 -0200101 unsigned int head = perf_mmap__read_head(md);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200102 unsigned int old = md->prev;
Jiri Olsa918512b2013-09-12 18:39:35 +0200103 unsigned char *data = md->base + page_size;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200104 unsigned long size;
105 void *buf;
David Ahern8d3eca22012-08-26 12:24:47 -0600106 int rc = 0;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200107
Arnaldo Carvalho de Melodc820092011-01-28 14:49:19 -0200108 if (old == head)
David Ahern8d3eca22012-08-26 12:24:47 -0600109 return 0;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200110
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200111 rec->samples++;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200112
113 size = head - old;
114
115 if ((old & md->mask) + size != (head & md->mask)) {
116 buf = &data[old & md->mask];
117 size = md->mask + 1 - (old & md->mask);
118 old += size;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200119
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300120 if (record__write(rec, buf, size) < 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600121 rc = -1;
122 goto out;
123 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200124 }
125
126 buf = &data[old & md->mask];
127 size = head - old;
128 old += size;
Ingo Molnar021e9f42009-06-03 19:27:19 +0200129
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300130 if (record__write(rec, buf, size) < 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600131 rc = -1;
132 goto out;
133 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200134
135 md->prev = old;
Arnaldo Carvalho de Melo115d2d82011-01-12 17:11:53 -0200136 perf_mmap__write_tail(md, old);
David Ahern8d3eca22012-08-26 12:24:47 -0600137
138out:
139 return rc;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200140}
141
142static volatile int done = 0;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200143static volatile int signr = -1;
Andi Kleen33e49ea2011-09-15 14:31:40 -0700144static volatile int child_finished = 0;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200145
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200146static void sig_handler(int sig)
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200147{
Andi Kleen33e49ea2011-09-15 14:31:40 -0700148 if (sig == SIGCHLD)
149 child_finished = 1;
150
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200151 done = 1;
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200152 signr = sig;
153}
154
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300155static void record__sig_exit(int exit_status __maybe_unused, void *arg)
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200156{
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300157 struct record *rec = arg;
Andi Kleen33e49ea2011-09-15 14:31:40 -0700158 int status;
159
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200160 if (rec->evlist->workload.pid > 0) {
Andi Kleen33e49ea2011-09-15 14:31:40 -0700161 if (!child_finished)
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200162 kill(rec->evlist->workload.pid, SIGTERM);
Andi Kleen33e49ea2011-09-15 14:31:40 -0700163
164 wait(&status);
165 if (WIFSIGNALED(status))
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200166 psignal(WTERMSIG(status), rec->progname);
Andi Kleen33e49ea2011-09-15 14:31:40 -0700167 }
Chris Wilson933da832009-10-04 01:35:01 +0100168
Arnaldo Carvalho de Melo18483b82010-12-06 15:13:38 -0200169 if (signr == -1 || signr == SIGUSR1)
Peter Zijlstraf7b7c262009-06-10 15:55:59 +0200170 return;
171
172 signal(signr, SIG_DFL);
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200173}
174
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300175static int record__open(struct record *rec)
Arnaldo Carvalho de Melodd7927f2011-01-12 14:28:51 -0200176{
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -0300177 char msg[512];
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200178 struct perf_evsel *pos;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200179 struct perf_evlist *evlist = rec->evlist;
180 struct perf_session *session = rec->session;
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300181 struct record_opts *opts = &rec->opts;
David Ahern8d3eca22012-08-26 12:24:47 -0600182 int rc = 0;
Arnaldo Carvalho de Melodd7927f2011-01-12 14:28:51 -0200183
Arnaldo Carvalho de Melof77a9512012-12-10 16:41:31 -0300184 perf_evlist__config(evlist, opts);
Jiri Olsacac21422012-11-12 18:34:00 +0100185
Arnaldo Carvalho de Melodd7927f2011-01-12 14:28:51 -0200186 list_for_each_entry(pos, &evlist->entries, node) {
Ingo Molnar3da297a2009-06-07 17:39:02 +0200187try_again:
Jiri Olsa6a4bb042012-08-08 12:22:36 +0200188 if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) {
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -0300189 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300190 if (verbose)
Arnaldo Carvalho de Meloc0a54342012-12-13 14:16:30 -0300191 ui__warning("%s\n", msg);
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300192 goto try_again;
193 }
David Ahernca6a4252011-03-25 13:11:11 -0600194
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -0300195 rc = -errno;
196 perf_evsel__open_strerror(pos, &opts->target,
197 errno, msg, sizeof(msg));
198 ui__error("%s\n", msg);
David Ahern8d3eca22012-08-26 12:24:47 -0600199 goto out;
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300200 }
Li Zefanc171b552009-10-15 11:22:07 +0800201 }
Arnaldo Carvalho de Meloa43d3f02010-12-25 12:12:25 -0200202
Arnaldo Carvalho de Melo1491a632012-09-26 14:43:13 -0300203 if (perf_evlist__apply_filters(evlist)) {
Frederic Weisbecker0a102472011-02-26 04:51:54 +0100204 error("failed to set filter with %d (%s)\n", errno,
205 strerror(errno));
David Ahern8d3eca22012-08-26 12:24:47 -0600206 rc = -1;
207 goto out;
Frederic Weisbecker0a102472011-02-26 04:51:54 +0100208 }
209
Nelson Elhage18e60932011-12-19 08:39:31 -0500210 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600211 if (errno == EPERM) {
212 pr_err("Permission error mapping pages.\n"
213 "Consider increasing "
214 "/proc/sys/kernel/perf_event_mlock_kb,\n"
215 "or try again with a smaller value of -m/--mmap_pages.\n"
Adrian Hunter53653d72013-12-09 15:18:40 +0200216 "(current value: %u)\n", opts->mmap_pages);
David Ahern8d3eca22012-08-26 12:24:47 -0600217 rc = -errno;
David Ahern8d3eca22012-08-26 12:24:47 -0600218 } else {
219 pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno));
220 rc = -errno;
221 }
222 goto out;
Nelson Elhage18e60932011-12-19 08:39:31 -0500223 }
Arnaldo Carvalho de Melo0a27d7f2011-01-14 15:50:51 -0200224
Jiri Olsa563aecb2013-06-05 13:35:06 +0200225 session->evlist = evlist;
Arnaldo Carvalho de Melo7b56cce2012-08-01 19:31:00 -0300226 perf_session__set_id_hdr_size(session);
David Ahern8d3eca22012-08-26 12:24:47 -0600227out:
228 return rc;
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200229}
230
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300231static int process_buildids(struct record *rec)
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200232{
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200233 struct perf_data_file *file = &rec->file;
234 struct perf_session *session = rec->session;
David Ahern7ab75cf2013-11-06 11:41:36 -0700235 u64 start = session->header.data_offset;
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200236
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200237 u64 size = lseek(file->fd, 0, SEEK_CUR);
Arnaldo Carvalho de Melo9f591fd2010-03-11 15:53:11 -0300238 if (size == 0)
239 return 0;
240
David Ahern7ab75cf2013-11-06 11:41:36 -0700241 return __perf_session__process_events(session, start,
242 size - start,
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -0200243 size, &build_id__mark_dso_hit_ops);
244}
245
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300246static void record__exit(int status, void *arg)
Peter Zijlstraf5970552009-06-18 23:22:55 +0200247{
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300248 struct record *rec = arg;
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200249 struct perf_data_file *file = &rec->file;
Peter Zijlstraf5970552009-06-18 23:22:55 +0200250
David Ahern8d3eca22012-08-26 12:24:47 -0600251 if (status != 0)
252 return;
253
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200254 if (!file->is_pipe) {
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200255 rec->session->header.data_size += rec->bytes_written;
256
257 if (!rec->no_buildid)
258 process_buildids(rec);
259 perf_session__write_header(rec->session, rec->evlist,
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200260 file->fd, true);
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200261 perf_session__delete(rec->session);
262 perf_evlist__delete(rec->evlist);
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -0300263 symbol__exit();
Tom Zanussic7929e42010-04-01 23:59:22 -0500264 }
Peter Zijlstraf5970552009-06-18 23:22:55 +0200265}
266
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200267static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800268{
269 int err;
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200270 struct perf_tool *tool = data;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800271 /*
272 *As for guest kernel when processing subcommand record&report,
273 *we arrange module mmap prior to guest kernel mmap and trigger
274 *a preload dso because default guest module symbols are loaded
275 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
276 *method is used to avoid symbol missing when the first addr is
277 *in module instead of in guest kernel.
278 */
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200279 err = perf_event__synthesize_modules(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200280 machine);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800281 if (err < 0)
282 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300283 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800284
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800285 /*
286 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
287 * have no _text sometimes.
288 */
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200289 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200290 machine, "_text");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800291 if (err < 0)
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200292 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200293 machine, "_stext");
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800294 if (err < 0)
295 pr_err("Couldn't record guest kernel [%d]'s reference"
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300296 " relocation symbol.\n", machine->pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800297}
298
Frederic Weisbecker98402802010-05-02 22:05:29 +0200299static struct perf_event_header finished_round_event = {
300 .size = sizeof(struct perf_event_header),
301 .type = PERF_RECORD_FINISHED_ROUND,
302};
303
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300304static int record__mmap_read_all(struct record *rec)
Frederic Weisbecker98402802010-05-02 22:05:29 +0200305{
Peter Zijlstra0e2e63d2010-05-20 14:45:26 +0200306 int i;
David Ahern8d3eca22012-08-26 12:24:47 -0600307 int rc = 0;
Frederic Weisbecker98402802010-05-02 22:05:29 +0200308
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200309 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
David Ahern8d3eca22012-08-26 12:24:47 -0600310 if (rec->evlist->mmap[i].base) {
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300311 if (record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600312 rc = -1;
313 goto out;
314 }
315 }
Frederic Weisbecker98402802010-05-02 22:05:29 +0200316 }
317
Stephane Eranian2eeaaa02012-05-15 13:28:13 +0200318 if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA))
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300319 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
David Ahern8d3eca22012-08-26 12:24:47 -0600320
321out:
322 return rc;
Frederic Weisbecker98402802010-05-02 22:05:29 +0200323}
324
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300325static void record__init_features(struct record *rec)
David Ahern57706ab2013-11-06 11:41:34 -0700326{
327 struct perf_evlist *evsel_list = rec->evlist;
328 struct perf_session *session = rec->session;
329 int feat;
330
331 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
332 perf_header__set_feat(&session->header, feat);
333
334 if (rec->no_buildid)
335 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
336
337 if (!have_tracepoints(&evsel_list->entries))
338 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
339
340 if (!rec->opts.branch_stack)
341 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
342}
343
Arnaldo Carvalho de Melof33cbe72014-01-02 15:11:25 -0300344static volatile int workload_exec_errno;
345
346/*
347 * perf_evlist__prepare_workload will send a SIGUSR1
348 * if the fork fails, since we asked by setting its
349 * want_signal to true.
350 */
351static void workload_exec_failed_signal(int signo, siginfo_t *info,
352 void *ucontext __maybe_unused)
353{
354 workload_exec_errno = info->si_value.sival_int;
355 done = 1;
356 signr = signo;
357 child_finished = 1;
358}
359
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300360static int __cmd_record(struct record *rec, int argc, const char **argv)
Peter Zijlstra16c8a102009-05-05 17:50:27 +0200361{
David Ahern57706ab2013-11-06 11:41:34 -0700362 int err;
Peter Zijlstra8b412662009-09-17 19:59:05 +0200363 unsigned long waking = 0;
Zhang, Yanmin46be6042010-03-18 11:36:04 -0300364 const bool forks = argc > 0;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300365 struct machine *machine;
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200366 struct perf_tool *tool = &rec->tool;
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300367 struct record_opts *opts = &rec->opts;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200368 struct perf_evlist *evsel_list = rec->evlist;
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200369 struct perf_data_file *file = &rec->file;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200370 struct perf_session *session;
Jiri Olsa27119262012-11-12 18:34:02 +0100371 bool disabled = false;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200372
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200373 rec->progname = argv[0];
Andi Kleen33e49ea2011-09-15 14:31:40 -0700374
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300375 on_exit(record__sig_exit, rec);
Peter Zijlstraf5970552009-06-18 23:22:55 +0200376 signal(SIGCHLD, sig_handler);
377 signal(SIGINT, sig_handler);
David Ahern804f7ac2013-05-06 12:24:23 -0600378 signal(SIGTERM, sig_handler);
Peter Zijlstraf5970552009-06-18 23:22:55 +0200379
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200380 session = perf_session__new(file, false, NULL);
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -0200381 if (session == NULL) {
Arnaldo Carvalho de Meloa9a70bb2009-11-17 01:18:11 -0200382 pr_err("Not enough memory for reading perf file header\n");
383 return -1;
384 }
385
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200386 rec->session = session;
387
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300388 record__init_features(rec);
Stephane Eranian330aa672012-03-08 23:47:46 +0100389
Arnaldo Carvalho de Melod4db3f12009-12-27 21:36:57 -0200390 if (forks) {
Namhyung Kim6ef73ec2013-03-11 16:43:15 +0900391 err = perf_evlist__prepare_workload(evsel_list, &opts->target,
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200392 argv, file->is_pipe,
Arnaldo Carvalho de Melo735f7e02014-01-03 14:56:49 -0300393 workload_exec_failed_signal);
Arnaldo Carvalho de Melo35b9d882011-11-09 08:47:15 -0200394 if (err < 0) {
395 pr_err("Couldn't run the workload!\n");
396 goto out_delete_session;
Jens Axboe0a5ac842009-08-12 11:18:01 +0200397 }
Peter Zijlstra856e9662009-12-16 17:55:55 +0100398 }
399
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300400 if (record__open(rec) != 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600401 err = -1;
402 goto out_delete_session;
403 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200404
Namhyung Kima8bb5592013-01-22 18:09:31 +0900405 if (!evsel_list->nr_groups)
406 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
407
Arnaldo Carvalho de Melo712a4b62011-02-17 12:18:42 -0200408 /*
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300409 * perf_session__delete(session) will be called at record__exit()
Arnaldo Carvalho de Melo712a4b62011-02-17 12:18:42 -0200410 */
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300411 on_exit(record__exit, rec);
Arnaldo Carvalho de Melo712a4b62011-02-17 12:18:42 -0200412
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200413 if (file->is_pipe) {
414 err = perf_header__write_pipe(file->fd);
Tom Zanussi529870e2010-04-01 23:59:16 -0500415 if (err < 0)
David Ahern8d3eca22012-08-26 12:24:47 -0600416 goto out_delete_session;
Jiri Olsa563aecb2013-06-05 13:35:06 +0200417 } else {
Arnaldo Carvalho de Meloa91e5432011-03-10 11:15:54 -0300418 err = perf_session__write_header(session, evsel_list,
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200419 file->fd, false);
Arnaldo Carvalho de Melod5eed902009-11-19 14:55:56 -0200420 if (err < 0)
David Ahern8d3eca22012-08-26 12:24:47 -0600421 goto out_delete_session;
Arnaldo Carvalho de Melod5eed902009-11-19 14:55:56 -0200422 }
Peter Zijlstra7c6a1c62009-06-25 17:05:54 +0200423
David Ahernd3665492012-02-06 15:27:52 -0700424 if (!rec->no_buildid
Robert Richtere20960c2011-12-07 10:02:55 +0100425 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
David Ahernd3665492012-02-06 15:27:52 -0700426 pr_err("Couldn't generate buildids. "
Robert Richtere20960c2011-12-07 10:02:55 +0100427 "Use --no-buildid to profile anyway.\n");
David Ahern8d3eca22012-08-26 12:24:47 -0600428 err = -1;
429 goto out_delete_session;
Robert Richtere20960c2011-12-07 10:02:55 +0100430 }
431
Arnaldo Carvalho de Melo34ba5122012-12-19 09:04:24 -0300432 machine = &session->machines.host;
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200433
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200434 if (file->is_pipe) {
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200435 err = perf_event__synthesize_attrs(tool, session,
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200436 process_synthesized_event);
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500437 if (err < 0) {
438 pr_err("Couldn't synthesize attrs.\n");
David Ahern8d3eca22012-08-26 12:24:47 -0600439 goto out_delete_session;
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500440 }
Tom Zanussicd19a032010-04-01 23:59:20 -0500441
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200442 if (have_tracepoints(&evsel_list->entries)) {
Tom Zanussi63e0c772010-05-03 00:14:48 -0500443 /*
444 * FIXME err <= 0 here actually means that
445 * there were no tracepoints so its not really
446 * an error, just that we don't need to
447 * synthesize anything. We really have to
448 * return this more properly and also
449 * propagate errors that now are calling die()
450 */
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200451 err = perf_event__synthesize_tracing_data(tool, file->fd, evsel_list,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200452 process_synthesized_event);
Tom Zanussi63e0c772010-05-03 00:14:48 -0500453 if (err <= 0) {
454 pr_err("Couldn't record tracing data.\n");
David Ahern8d3eca22012-08-26 12:24:47 -0600455 goto out_delete_session;
Tom Zanussi63e0c772010-05-03 00:14:48 -0500456 }
David Ahernf34b9002013-11-06 11:41:35 -0700457 rec->bytes_written += err;
Tom Zanussi63e0c772010-05-03 00:14:48 -0500458 }
Tom Zanussi2c46dbb2010-04-01 23:59:19 -0500459 }
460
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200461 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200462 machine, "_text");
Arnaldo Carvalho de Melo70162132010-03-30 18:27:39 -0300463 if (err < 0)
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200464 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200465 machine, "_stext");
Arnaldo Carvalho de Meloc1a3a4b2010-11-22 14:01:55 -0200466 if (err < 0)
467 pr_err("Couldn't record kernel reference relocation symbol\n"
468 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
469 "Check /proc/kallsyms permission or run as root.\n");
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -0200470
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -0200471 err = perf_event__synthesize_modules(tool, process_synthesized_event,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200472 machine);
Arnaldo Carvalho de Meloc1a3a4b2010-11-22 14:01:55 -0200473 if (err < 0)
474 pr_err("Couldn't record kernel module information.\n"
475 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
476 "Check /proc/modules permission or run as root.\n");
477
Arnaldo Carvalho de Melo7e383de2012-12-18 15:49:27 -0300478 if (perf_guest) {
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300479 machines__process_guests(&session->machines,
480 perf_event__synthesize_guest_os, tool);
Arnaldo Carvalho de Melo7e383de2012-12-18 15:49:27 -0300481 }
Arnaldo Carvalho de Melob7cece762010-01-13 13:22:17 -0200482
Arnaldo Carvalho de Meloa33fbd52013-11-11 11:36:12 -0300483 err = __machine__synthesize_threads(machine, tool, &opts->target, evsel_list->threads,
484 process_synthesized_event, opts->sample_address);
David Ahern8d3eca22012-08-26 12:24:47 -0600485 if (err != 0)
486 goto out_delete_session;
487
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200488 if (rec->realtime_prio) {
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200489 struct sched_param param;
490
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200491 param.sched_priority = rec->realtime_prio;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200492 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
Arnaldo Carvalho de Melo6beba7a2009-10-21 17:34:06 -0200493 pr_err("Could not set realtime priority.\n");
David Ahern8d3eca22012-08-26 12:24:47 -0600494 err = -1;
495 goto out_delete_session;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200496 }
497 }
498
Jiri Olsa774cb492012-11-12 18:34:01 +0100499 /*
500 * When perf is starting the traced process, all the events
501 * (apart from group members) have enable_on_exec=1 set,
502 * so don't spoil it by prematurely enabling them.
503 */
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300504 if (!target__none(&opts->target))
Jiri Olsa774cb492012-11-12 18:34:01 +0100505 perf_evlist__enable(evsel_list);
David Ahern764e16a32011-08-25 10:17:55 -0600506
Peter Zijlstra856e9662009-12-16 17:55:55 +0100507 /*
508 * Let the child rip
509 */
Arnaldo Carvalho de Melo735f7e02014-01-03 14:56:49 -0300510 if (forks)
Arnaldo Carvalho de Melo35b9d882011-11-09 08:47:15 -0200511 perf_evlist__start_workload(evsel_list);
Peter Zijlstra856e9662009-12-16 17:55:55 +0100512
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200513 for (;;) {
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200514 int hits = rec->samples;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200515
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300516 if (record__mmap_read_all(rec) < 0) {
David Ahern8d3eca22012-08-26 12:24:47 -0600517 err = -1;
518 goto out_delete_session;
519 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200520
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200521 if (hits == rec->samples) {
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200522 if (done)
523 break;
Arnaldo Carvalho de Melo5c581042011-01-11 22:30:02 -0200524 err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
Peter Zijlstra8b412662009-09-17 19:59:05 +0200525 waking++;
526 }
527
Jiri Olsa774cb492012-11-12 18:34:01 +0100528 /*
529 * When perf is starting the traced process, at the end events
530 * die with the process and we wait for that. Thus no need to
531 * disable events in this case.
532 */
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300533 if (done && !disabled && !target__none(&opts->target)) {
Arnaldo Carvalho de Melo4152ab32011-07-25 11:06:19 -0300534 perf_evlist__disable(evsel_list);
Jiri Olsa27119262012-11-12 18:34:02 +0100535 disabled = true;
536 }
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200537 }
538
Arnaldo Carvalho de Melof33cbe72014-01-02 15:11:25 -0300539 if (forks && workload_exec_errno) {
540 char msg[512];
541 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
542 pr_err("Workload failed: %s\n", emsg);
543 err = -1;
544 goto out_delete_session;
545 }
546
Arnaldo Carvalho de Melo18483b82010-12-06 15:13:38 -0200547 if (quiet || signr == SIGUSR1)
Arnaldo Carvalho de Melob44308f2010-10-26 15:20:09 -0200548 return 0;
549
Peter Zijlstra8b412662009-09-17 19:59:05 +0200550 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
551
Ingo Molnar021e9f42009-06-03 19:27:19 +0200552 /*
553 * Approximate RIP event size: 24 bytes.
554 */
555 fprintf(stderr,
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200556 "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200557 (double)rec->bytes_written / 1024.0 / 1024.0,
Jiri Olsa6a4d98d2013-10-15 16:27:33 +0200558 file->path,
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200559 rec->bytes_written / 24);
Ingo Molnaraddc2782009-06-02 23:43:11 +0200560
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200561 return 0;
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300562
563out_delete_session:
564 perf_session__delete(session);
565 return err;
Peter Zijlstrade9ac072009-04-08 15:01:31 +0200566}
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200567
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100568#define BRANCH_OPT(n, m) \
569 { .name = n, .mode = (m) }
570
571#define BRANCH_END { .name = NULL }
572
573struct branch_mode {
574 const char *name;
575 int mode;
576};
577
578static const struct branch_mode branch_modes[] = {
579 BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
580 BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
581 BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
582 BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
583 BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
584 BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
585 BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
Andi Kleen0126d492013-09-20 07:40:42 -0700586 BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
587 BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
588 BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100589 BRANCH_END
590};
591
592static int
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100593parse_branch_stack(const struct option *opt, const char *str, int unset)
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100594{
595#define ONLY_PLM \
596 (PERF_SAMPLE_BRANCH_USER |\
597 PERF_SAMPLE_BRANCH_KERNEL |\
598 PERF_SAMPLE_BRANCH_HV)
599
600 uint64_t *mode = (uint64_t *)opt->value;
601 const struct branch_mode *br;
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100602 char *s, *os = NULL, *p;
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100603 int ret = -1;
604
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100605 if (unset)
606 return 0;
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100607
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100608 /*
609 * cannot set it twice, -b + --branch-filter for instance
610 */
611 if (*mode)
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100612 return -1;
613
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100614 /* str may be NULL in case no arg is passed to -b */
615 if (str) {
616 /* because str is read-only */
617 s = os = strdup(str);
618 if (!s)
619 return -1;
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100620
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100621 for (;;) {
622 p = strchr(s, ',');
623 if (p)
624 *p = '\0';
625
626 for (br = branch_modes; br->name; br++) {
627 if (!strcasecmp(s, br->name))
628 break;
629 }
630 if (!br->name) {
631 ui__warning("unknown branch filter %s,"
632 " check man page\n", s);
633 goto error;
634 }
635
636 *mode |= br->mode;
637
638 if (!p)
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100639 break;
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100640
641 s = p + 1;
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100642 }
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100643 }
644 ret = 0;
645
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100646 /* default to any branch */
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100647 if ((*mode & ~ONLY_PLM) == 0) {
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100648 *mode = PERF_SAMPLE_BRANCH_ANY;
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100649 }
650error:
651 free(os);
652 return ret;
653}
654
Ingo Molnar89fe8082013-09-30 12:07:11 +0200655#ifdef HAVE_LIBUNWIND_SUPPORT
Jiri Olsa26d33022012-08-07 15:20:47 +0200656static int get_stack_size(char *str, unsigned long *_size)
657{
658 char *endptr;
659 unsigned long size;
660 unsigned long max_size = round_down(USHRT_MAX, sizeof(u64));
661
662 size = strtoul(str, &endptr, 0);
663
664 do {
665 if (*endptr)
666 break;
667
668 size = round_up(size, sizeof(u64));
669 if (!size || size > max_size)
670 break;
671
672 *_size = size;
673 return 0;
674
675 } while (0);
676
677 pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
678 max_size, str);
679 return -1;
680}
Ingo Molnar89fe8082013-09-30 12:07:11 +0200681#endif /* HAVE_LIBUNWIND_SUPPORT */
Jiri Olsa26d33022012-08-07 15:20:47 +0200682
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300683int record_parse_callchain(const char *arg, struct record_opts *opts)
Jiri Olsa26d33022012-08-07 15:20:47 +0200684{
Jiri Olsa26d33022012-08-07 15:20:47 +0200685 char *tok, *name, *saveptr = NULL;
686 char *buf;
687 int ret = -1;
688
Jiri Olsa26d33022012-08-07 15:20:47 +0200689 /* We need buffer that we know we can write to. */
690 buf = malloc(strlen(arg) + 1);
691 if (!buf)
692 return -ENOMEM;
693
694 strcpy(buf, arg);
695
696 tok = strtok_r((char *)buf, ",", &saveptr);
697 name = tok ? : (char *)buf;
698
699 do {
700 /* Framepointer style */
701 if (!strncmp(name, "fp", sizeof("fp"))) {
702 if (!strtok_r(NULL, ",", &saveptr)) {
Arnaldo Carvalho de Meloc5ff78c2012-12-11 16:16:47 -0300703 opts->call_graph = CALLCHAIN_FP;
Jiri Olsa26d33022012-08-07 15:20:47 +0200704 ret = 0;
705 } else
706 pr_err("callchain: No more arguments "
707 "needed for -g fp\n");
708 break;
709
Ingo Molnar89fe8082013-09-30 12:07:11 +0200710#ifdef HAVE_LIBUNWIND_SUPPORT
Jiri Olsa26d33022012-08-07 15:20:47 +0200711 /* Dwarf style */
712 } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
Arnaldo Carvalho de Melo61eaa3b2012-10-01 15:20:58 -0300713 const unsigned long default_stack_dump_size = 8192;
714
Jiri Olsa26d33022012-08-07 15:20:47 +0200715 ret = 0;
Arnaldo Carvalho de Meloc5ff78c2012-12-11 16:16:47 -0300716 opts->call_graph = CALLCHAIN_DWARF;
717 opts->stack_dump_size = default_stack_dump_size;
Jiri Olsa26d33022012-08-07 15:20:47 +0200718
719 tok = strtok_r(NULL, ",", &saveptr);
720 if (tok) {
721 unsigned long size = 0;
722
723 ret = get_stack_size(tok, &size);
Arnaldo Carvalho de Meloc5ff78c2012-12-11 16:16:47 -0300724 opts->stack_dump_size = size;
Jiri Olsa26d33022012-08-07 15:20:47 +0200725 }
Ingo Molnar89fe8082013-09-30 12:07:11 +0200726#endif /* HAVE_LIBUNWIND_SUPPORT */
Jiri Olsa26d33022012-08-07 15:20:47 +0200727 } else {
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200728 pr_err("callchain: Unknown --call-graph option "
Jiri Olsa26d33022012-08-07 15:20:47 +0200729 "value: %s\n", arg);
730 break;
731 }
732
733 } while (0);
734
735 free(buf);
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200736 return ret;
737}
Jiri Olsa26d33022012-08-07 15:20:47 +0200738
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300739static void callchain_debug(struct record_opts *opts)
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200740{
741 pr_debug("callchain: type %d\n", opts->call_graph);
742
743 if (opts->call_graph == CALLCHAIN_DWARF)
744 pr_debug("callchain: stack dump size %d\n",
745 opts->stack_dump_size);
746}
747
748int record_parse_callchain_opt(const struct option *opt,
749 const char *arg,
750 int unset)
751{
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300752 struct record_opts *opts = opt->value;
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200753 int ret;
754
755 /* --no-call-graph */
756 if (unset) {
757 opts->call_graph = CALLCHAIN_NONE;
758 pr_debug("callchain: disabled\n");
759 return 0;
760 }
761
762 ret = record_parse_callchain(arg, opts);
Jiri Olsa26d33022012-08-07 15:20:47 +0200763 if (!ret)
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200764 callchain_debug(opts);
Jiri Olsa26d33022012-08-07 15:20:47 +0200765
766 return ret;
767}
768
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200769int record_callchain_opt(const struct option *opt,
770 const char *arg __maybe_unused,
771 int unset __maybe_unused)
772{
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300773 struct record_opts *opts = opt->value;
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200774
775 if (opts->call_graph == CALLCHAIN_NONE)
776 opts->call_graph = CALLCHAIN_FP;
777
778 callchain_debug(opts);
779 return 0;
780}
781
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200782static const char * const record_usage[] = {
Mike Galbraith9e0967532009-05-28 16:25:34 +0200783 "perf record [<options>] [<command>]",
784 "perf record [<options>] -- <command> [<options>]",
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200785 NULL
786};
787
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200788/*
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300789 * XXX Ideally would be local to cmd_record() and passed to a record__new
790 * because we need to have access to it in record__exit, that is called
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200791 * after cmd_record() exits, but since record_options need to be accessible to
792 * builtin-script, leave it here.
793 *
794 * At least we don't ouch it in all the other functions here directly.
795 *
796 * Just say no to tons of global variables, sigh.
797 */
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300798static struct record record = {
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200799 .opts = {
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200800 .mmap_pages = UINT_MAX,
801 .user_freq = UINT_MAX,
802 .user_interval = ULLONG_MAX,
Arnaldo Carvalho de Melo447a6012012-05-22 13:14:18 -0300803 .freq = 4000,
Namhyung Kimd1cb9fc2012-05-16 18:45:49 +0900804 .target = {
805 .uses_mmap = true,
Adrian Hunter3aa59392013-11-15 15:52:29 +0200806 .default_per_cpu = true,
Namhyung Kimd1cb9fc2012-05-16 18:45:49 +0900807 },
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200808 },
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200809};
Frederic Weisbecker7865e812010-04-14 19:42:07 +0200810
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200811#define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: "
Arnaldo Carvalho de Melo61eaa3b2012-10-01 15:20:58 -0300812
Ingo Molnar89fe8082013-09-30 12:07:11 +0200813#ifdef HAVE_LIBUNWIND_SUPPORT
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200814const char record_callchain_help[] = CALLCHAIN_HELP "fp dwarf";
Arnaldo Carvalho de Melo61eaa3b2012-10-01 15:20:58 -0300815#else
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200816const char record_callchain_help[] = CALLCHAIN_HELP "fp";
Arnaldo Carvalho de Melo61eaa3b2012-10-01 15:20:58 -0300817#endif
818
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200819/*
820 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
821 * with it and switch to use the library functions in perf_evlist that came
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300822 * from builtin-record.c, i.e. use record_opts,
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200823 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
824 * using pipes, etc.
825 */
Tom Zanussibca647a2010-11-10 08:11:30 -0600826const struct option record_options[] = {
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200827 OPT_CALLBACK('e', "event", &record.evlist, "event",
Thomas Gleixner86847b62009-06-06 12:24:17 +0200828 "event selector. use 'perf list' to list available events",
Jiri Olsaf120f9d2011-07-14 11:25:32 +0200829 parse_events_option),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200830 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
Li Zefanc171b552009-10-15 11:22:07 +0800831 "event filter", parse_filter),
Namhyung Kimbea03402012-04-26 14:15:15 +0900832 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300833 "record events on existing process id"),
Namhyung Kimbea03402012-04-26 14:15:15 +0900834 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
Zhang, Yanmind6d901c2010-03-18 11:36:05 -0300835 "record events on existing thread id"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200836 OPT_INTEGER('r', "realtime", &record.realtime_prio,
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200837 "collect data with this RT SCHED_FIFO priority"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200838 OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay,
Kirill Smelkovacac03f2011-01-12 17:59:36 +0300839 "collect data without buffering"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200840 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
Frederic Weisbeckerdaac07b2009-08-13 10:27:19 +0200841 "collect raw sample records from all opened counters"),
Namhyung Kimbea03402012-04-26 14:15:15 +0900842 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200843 "system-wide collection from all CPUs"),
Namhyung Kimbea03402012-04-26 14:15:15 +0900844 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
Stephane Eranianc45c6ea2010-05-28 12:00:01 +0200845 "list of cpus to monitor"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200846 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
Jiri Olsaf5fc14122013-10-15 16:27:32 +0200847 OPT_STRING('o', "output", &record.file.path, "file",
Ingo Molnarabaff322009-06-02 22:59:57 +0200848 "output file name"),
Adrian Hunter69e7e5b2013-11-18 11:55:57 +0200849 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
850 &record.opts.no_inherit_set,
851 "child tasks do not inherit counters"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200852 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
Jiri Olsa994a1f72013-09-01 12:36:12 +0200853 OPT_CALLBACK('m', "mmap-pages", &record.opts.mmap_pages, "pages",
854 "number of mmap data pages",
855 perf_evlist__parse_mmap_pages),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200856 OPT_BOOLEAN(0, "group", &record.opts.group,
Lin Ming43bece72011-08-17 18:42:07 +0800857 "put the counters into a counter group"),
Jiri Olsa09b0fd42013-10-26 16:25:33 +0200858 OPT_CALLBACK_NOOPT('g', NULL, &record.opts,
859 NULL, "enables call-graph recording" ,
860 &record_callchain_opt),
861 OPT_CALLBACK(0, "call-graph", &record.opts,
862 "mode[,dump_size]", record_callchain_help,
863 &record_parse_callchain_opt),
Ian Munsiec0555642010-04-13 18:37:33 +1000864 OPT_INCR('v', "verbose", &verbose,
Ingo Molnar3da297a2009-06-07 17:39:02 +0200865 "be more verbose (show counter open errors, etc)"),
Arnaldo Carvalho de Melob44308f2010-10-26 15:20:09 -0200866 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200867 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200868 "per thread counts"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200869 OPT_BOOLEAN('d', "data", &record.opts.sample_address,
Anton Blanchard4bba8282009-07-16 15:44:29 +0200870 "Sample addresses"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200871 OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"),
Andrew Vagin3e76ac72011-12-20 17:32:45 +0300872 OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200873 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
Peter Zijlstra649c48a2009-06-24 21:12:48 +0200874 "don't sample"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200875 OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache,
Stephane Eraniana1ac1d32010-06-17 11:39:01 +0200876 "do not update the buildid cache"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200877 OPT_BOOLEAN('B', "no-buildid", &record.no_buildid,
Arnaldo Carvalho de Melobaa2f6c2010-11-26 19:39:15 -0200878 "do not collect buildids in perf.data"),
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200879 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
Stephane Eranian023695d2011-02-14 11:20:01 +0200880 "monitor event in cgroup name only",
881 parse_cgroups),
Namhyung Kimbea03402012-04-26 14:15:15 +0900882 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
883 "user to profile"),
Stephane Eraniana5aabda2012-03-08 23:47:45 +0100884
885 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
886 "branch any", "sample any taken branches",
887 parse_branch_stack),
888
889 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
890 "branch filter mask", "branch stack filter modes",
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100891 parse_branch_stack),
Andi Kleen05484292013-01-24 16:10:29 +0100892 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
893 "sample by weight (on special events only)"),
Andi Kleen475eeab2013-09-20 07:40:43 -0700894 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
895 "sample transaction flags (special events only)"),
Adrian Hunter3aa59392013-11-15 15:52:29 +0200896 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
897 "use per-thread mmaps"),
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200898 OPT_END()
899};
900
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300901int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200902{
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200903 int err = -ENOMEM;
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200904 struct perf_evlist *evsel_list;
Arnaldo Carvalho de Melo8c6f45a2013-12-19 14:38:03 -0300905 struct record *rec = &record;
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900906 char errbuf[BUFSIZ];
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200907
Namhyung Kim334fe7a2013-03-11 16:43:12 +0900908 evsel_list = perf_evlist__new();
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200909 if (evsel_list == NULL)
910 return -ENOMEM;
911
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200912 rec->evlist = evsel_list;
913
Tom Zanussibca647a2010-11-10 08:11:30 -0600914 argc = parse_options(argc, argv, record_options, record_usage,
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200915 PARSE_OPT_STOP_AT_NON_OPTION);
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300916 if (!argc && target__none(&rec->opts.target))
Tom Zanussibca647a2010-11-10 08:11:30 -0600917 usage_with_options(record_usage, record_options);
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200918
Namhyung Kimbea03402012-04-26 14:15:15 +0900919 if (nr_cgroups && !rec->opts.target.system_wide) {
Namhyung Kim3780f482012-05-29 13:22:57 +0900920 ui__error("cgroup monitoring only available in"
921 " system-wide mode\n");
Stephane Eranian023695d2011-02-14 11:20:01 +0200922 usage_with_options(record_usage, record_options);
923 }
924
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200925 symbol__init();
Arnaldo Carvalho de Melobaa2f6c2010-11-26 19:39:15 -0200926
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -0300927 if (symbol_conf.kptr_restrict)
Arnaldo Carvalho de Melo646aaea2011-05-27 11:00:41 -0300928 pr_warning(
929"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
930"check /proc/sys/kernel/kptr_restrict.\n\n"
931"Samples in kernel functions may not be resolved if a suitable vmlinux\n"
932"file is not found in the buildid cache or in the vmlinux path.\n\n"
933"Samples in kernel modules won't be resolved at all.\n\n"
934"If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
935"even with a suitable vmlinux or kallsyms file.\n\n");
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -0300936
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200937 if (rec->no_buildid_cache || rec->no_buildid)
Stephane Eraniana1ac1d32010-06-17 11:39:01 +0200938 disable_buildid_cache();
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -0200939
Arnaldo Carvalho de Melo361c99a2011-01-11 20:56:53 -0200940 if (evsel_list->nr_entries == 0 &&
941 perf_evlist__add_default(evsel_list) < 0) {
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200942 pr_err("Not enough memory for event selector list\n");
943 goto out_symbol_exit;
Peter Zijlstrabbd36e52009-06-11 23:11:50 +0200944 }
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200945
Adrian Hunter69e7e5b2013-11-18 11:55:57 +0200946 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
947 rec->opts.no_inherit = true;
948
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300949 err = target__validate(&rec->opts.target);
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900950 if (err) {
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300951 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900952 ui__warning("%s", errbuf);
953 }
Namhyung Kim4bd0f2d2012-04-26 14:15:18 +0900954
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300955 err = target__parse_uid(&rec->opts.target);
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900956 if (err) {
957 int saved_errno = errno;
958
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -0300959 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
Namhyung Kim3780f482012-05-29 13:22:57 +0900960 ui__error("%s", errbuf);
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900961
962 err = -saved_errno;
Namhyung Kim8fa60e12013-03-15 14:48:51 +0900963 goto out_symbol_exit;
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900964 }
Arnaldo Carvalho de Melo0d37aa32012-01-19 14:08:15 -0200965
Namhyung Kim16ad2ff2012-05-07 14:09:02 +0900966 err = -ENOMEM;
Namhyung Kimb809ac12012-04-26 14:15:19 +0900967 if (perf_evlist__create_maps(evsel_list, &rec->opts.target) < 0)
Arnaldo Carvalho de Melodd7927f2011-01-12 14:28:51 -0200968 usage_with_options(record_usage, record_options);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200969
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300970 if (record_opts__config(&rec->opts)) {
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300971 err = -EINVAL;
Arnaldo Carvalho de Melo5c581042011-01-11 22:30:02 -0200972 goto out_free_fd;
Mike Galbraith7e4ff9e2009-10-12 07:56:03 +0200973 }
974
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200975 err = __cmd_record(&record, argc, argv);
Namhyung Kim8fa60e12013-03-15 14:48:51 +0900976
977 perf_evlist__munmap(evsel_list);
978 perf_evlist__close(evsel_list);
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300979out_free_fd:
Arnaldo Carvalho de Melo7e2ed092011-01-30 11:59:43 -0200980 perf_evlist__delete_maps(evsel_list);
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -0300981out_symbol_exit:
982 symbol__exit();
Arnaldo Carvalho de Melo39d17da2010-07-29 14:08:55 -0300983 return err;
Ingo Molnar0e9b20b2009-05-26 09:17:18 +0200984}