2 #include "util/evlist.h"
3 #include "util/parse-options.h"
4 #include "util/thread_map.h"
5 #include "event-parse.h"
10 static struct syscall_fmt {
16 { .name = "arch_prctl", .errmsg = true, .alias = "prctl", },
17 { .name = "fstat", .errmsg = true, .alias = "newfstat", },
18 { .name = "fstatat", .errmsg = true, .alias = "newfstatat", },
19 { .name = "futex", .errmsg = true, },
20 { .name = "poll", .errmsg = true, .timeout = true, },
21 { .name = "ppoll", .errmsg = true, .timeout = true, },
22 { .name = "read", .errmsg = true, },
23 { .name = "recvfrom", .errmsg = true, },
24 { .name = "select", .errmsg = true, .timeout = true, },
25 { .name = "stat", .errmsg = true, .alias = "newstat", },
28 static int syscall_fmt__cmp(const void *name, const void *fmtp)
30 const struct syscall_fmt *fmt = fmtp;
31 return strcmp(name, fmt->name);
34 static struct syscall_fmt *syscall_fmt__find(const char *name)
36 const int nmemb = ARRAY_SIZE(syscall_fmts);
37 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
41 struct event_format *tp_format;
43 struct syscall_fmt *fmt;
50 struct syscall *table;
52 struct perf_record_opts opts;
55 static int trace__read_syscall_info(struct trace *trace, int id)
60 if (id > trace->syscalls.max) {
61 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
63 if (nsyscalls == NULL)
66 if (trace->syscalls.max != -1) {
67 memset(nsyscalls + trace->syscalls.max + 1, 0,
68 (id - trace->syscalls.max) * sizeof(*sc));
70 memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
73 trace->syscalls.table = nsyscalls;
74 trace->syscalls.max = id;
77 sc = trace->syscalls.table + id;
78 sc->name = audit_syscall_to_name(id, trace->audit_machine);
82 sc->fmt = syscall_fmt__find(sc->name);
84 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
85 sc->tp_format = event_format__new("syscalls", tp_name);
87 if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) {
88 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
89 sc->tp_format = event_format__new("syscalls", tp_name);
92 return sc->tp_format != NULL ? 0 : -1;
95 static size_t syscall__fprintf_args(struct syscall *sc, unsigned long *args, FILE *fp)
100 if (sc->tp_format != NULL) {
101 struct format_field *field;
103 for (field = sc->tp_format->format.fields->next; field; field = field->next) {
104 printed += fprintf(fp, "%s%s: %ld", printed ? ", " : "",
105 field->name, args[i++]);
109 printed += fprintf(fp, "%sarg%d: %ld", printed ? ", " : "", i, args[i]);
117 static int trace__run(struct trace *trace)
119 struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
120 struct perf_evsel *evsel, *evsel_enter, *evsel_exit;
121 int err = -1, i, nr_events = 0, before;
123 if (evlist == NULL) {
124 printf("Not enough memory to run!\n");
128 evsel_enter = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
129 if (evsel_enter == NULL) {
130 printf("Couldn't read the raw_syscalls:sys_enter tracepoint information!\n");
131 goto out_delete_evlist;
134 perf_evlist__add(evlist, evsel_enter);
136 evsel_exit = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
137 if (evsel_exit == NULL) {
138 printf("Couldn't read the raw_syscalls:sys_exit tracepoint information!\n");
139 goto out_delete_evlist;
142 perf_evlist__add(evlist, evsel_exit);
144 err = perf_evlist__create_maps(evlist, &trace->opts.target);
146 printf("Problems parsing the target to trace, check your options!\n");
147 goto out_delete_evlist;
150 perf_evlist__config_attrs(evlist, &trace->opts);
152 err = perf_evlist__open(evlist);
154 printf("Couldn't create the events: %s\n", strerror(errno));
155 goto out_delete_evlist;
158 err = perf_evlist__mmap(evlist, UINT_MAX, false);
160 printf("Couldn't mmap the events: %s\n", strerror(errno));
161 goto out_delete_evlist;
164 perf_evlist__enable(evlist);
168 for (i = 0; i < evlist->nr_mmaps; i++) {
169 union perf_event *event;
171 while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
172 const u32 type = event->header.type;
174 struct perf_sample sample;
180 case PERF_RECORD_SAMPLE:
182 case PERF_RECORD_LOST:
183 printf("LOST %" PRIu64 " events!\n", event->lost.lost);
186 printf("Unexpected %s event, skipping...\n",
187 perf_event__name(type));
191 err = perf_evlist__parse_sample(evlist, event, &sample);
193 printf("Can't parse sample, err = %d, skipping...\n", err);
197 evsel = perf_evlist__id2evsel(evlist, sample.id);
199 printf("Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
203 id = perf_evsel__intval(evsel, &sample, "id");
205 printf("Invalid syscall %d id, skipping...\n", id);
209 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
210 trace__read_syscall_info(trace, id))
213 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
216 sc = &trace->syscalls.table[id];
218 if (evlist->threads->map[0] == -1 || evlist->threads->nr > 1)
219 printf("%d ", sample.tid);
221 if (evsel == evsel_enter) {
222 void *args = perf_evsel__rawptr(evsel, &sample, "args");
224 printf("%s(", sc->name);
225 syscall__fprintf_args(sc, args, stdout);
226 } else if (evsel == evsel_exit) {
227 int ret = perf_evsel__intval(evsel, &sample, "ret");
229 if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
231 const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
232 *e = audit_errno_to_name(-ret);
234 printf(") = -1 %s %s", e, emsg);
235 } else if (ret == 0 && sc->fmt && sc->fmt->timeout)
236 printf(") = 0 Timeout");
238 printf(") = %d", ret);
245 if (nr_events == before)
246 poll(evlist->pollfd, evlist->nr_fds, -1);
251 perf_evlist__delete(evlist);
256 int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
258 const char * const trace_usage[] = {
259 "perf trace [<options>]",
262 struct trace trace = {
263 .audit_machine = audit_detect_machine(),
272 .user_freq = UINT_MAX,
273 .user_interval = ULLONG_MAX,
278 const struct option trace_options[] = {
279 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
280 "trace events on existing process id"),
281 OPT_STRING(0, "tid", &trace.opts.target.tid, "tid",
282 "trace events on existing thread id"),
283 OPT_BOOLEAN(0, "all-cpus", &trace.opts.target.system_wide,
284 "system-wide collection from all CPUs"),
285 OPT_STRING(0, "cpu", &trace.opts.target.cpu_list, "cpu",
286 "list of cpus to monitor"),
287 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
288 "child tasks do not inherit counters"),
289 OPT_UINTEGER(0, "mmap-pages", &trace.opts.mmap_pages,
290 "number of mmap data pages"),
291 OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
297 argc = parse_options(argc, argv, trace_options, trace_usage, 0);
299 usage_with_options(trace_usage, trace_options);
301 err = perf_target__parse_uid(&trace.opts.target);
304 perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
309 return trace__run(&trace);