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Source at commit ec7cab4cbb721bff91ec924ec691efd8daf36579 created 12 years 8 months ago. By Maarten ter Huurne, MIPS: JZ4740: A320: Updated quickstart documentation. | |
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1 | /* |
2 | * builtin-annotate.c |
3 | * |
4 | * Builtin annotate command: Analyze the perf.data input file, |
5 | * look up and read DSOs and symbol information and display |
6 | * a histogram of results, along various sorting keys. |
7 | */ |
8 | #include "builtin.h" |
9 | |
10 | #include "util/util.h" |
11 | |
12 | #include "util/util.h" |
13 | #include "util/color.h" |
14 | #include <linux/list.h> |
15 | #include "util/cache.h" |
16 | #include <linux/rbtree.h> |
17 | #include "util/symbol.h" |
18 | |
19 | #include "perf.h" |
20 | #include "util/debug.h" |
21 | |
22 | #include "util/evlist.h" |
23 | #include "util/evsel.h" |
24 | #include "util/annotate.h" |
25 | #include "util/event.h" |
26 | #include "util/parse-options.h" |
27 | #include "util/parse-events.h" |
28 | #include "util/thread.h" |
29 | #include "util/sort.h" |
30 | #include "util/hist.h" |
31 | #include "util/session.h" |
32 | |
33 | static char const *input_name = "perf.data"; |
34 | |
35 | static bool force, use_tui, use_stdio; |
36 | |
37 | static bool full_paths; |
38 | |
39 | static bool print_line; |
40 | |
41 | static const char *sym_hist_filter; |
42 | |
43 | static int perf_evlist__add_sample(struct perf_evlist *evlist, |
44 | struct perf_sample *sample, |
45 | struct perf_evsel *evsel, |
46 | struct addr_location *al) |
47 | { |
48 | struct hist_entry *he; |
49 | int ret; |
50 | |
51 | if (sym_hist_filter != NULL && |
52 | (al->sym == NULL || strcmp(sym_hist_filter, al->sym->name) != 0)) { |
53 | /* We're only interested in a symbol named sym_hist_filter */ |
54 | if (al->sym != NULL) { |
55 | rb_erase(&al->sym->rb_node, |
56 | &al->map->dso->symbols[al->map->type]); |
57 | symbol__delete(al->sym); |
58 | } |
59 | return 0; |
60 | } |
61 | |
62 | he = __hists__add_entry(&evsel->hists, al, NULL, 1); |
63 | if (he == NULL) |
64 | return -ENOMEM; |
65 | |
66 | ret = 0; |
67 | if (he->ms.sym != NULL) { |
68 | struct annotation *notes = symbol__annotation(he->ms.sym); |
69 | if (notes->src == NULL && |
70 | symbol__alloc_hist(he->ms.sym, evlist->nr_entries) < 0) |
71 | return -ENOMEM; |
72 | |
73 | ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr); |
74 | } |
75 | |
76 | evsel->hists.stats.total_period += sample->period; |
77 | hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); |
78 | return ret; |
79 | } |
80 | |
81 | static int process_sample_event(union perf_event *event, |
82 | struct perf_sample *sample, |
83 | struct perf_evsel *evsel, |
84 | struct perf_session *session) |
85 | { |
86 | struct addr_location al; |
87 | |
88 | if (perf_event__preprocess_sample(event, session, &al, sample, |
89 | symbol__annotate_init) < 0) { |
90 | pr_warning("problem processing %d event, skipping it.\n", |
91 | event->header.type); |
92 | return -1; |
93 | } |
94 | |
95 | if (!al.filtered && |
96 | perf_evlist__add_sample(session->evlist, sample, evsel, &al)) { |
97 | pr_warning("problem incrementing symbol count, " |
98 | "skipping event\n"); |
99 | return -1; |
100 | } |
101 | |
102 | return 0; |
103 | } |
104 | |
105 | static int hist_entry__tty_annotate(struct hist_entry *he, int evidx) |
106 | { |
107 | return symbol__tty_annotate(he->ms.sym, he->ms.map, evidx, |
108 | print_line, full_paths, 0, 0); |
109 | } |
110 | |
111 | static void hists__find_annotations(struct hists *self, int evidx) |
112 | { |
113 | struct rb_node *nd = rb_first(&self->entries), *next; |
114 | int key = KEY_RIGHT; |
115 | |
116 | while (nd) { |
117 | struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node); |
118 | struct annotation *notes; |
119 | |
120 | if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned) |
121 | goto find_next; |
122 | |
123 | notes = symbol__annotation(he->ms.sym); |
124 | if (notes->src == NULL) { |
125 | find_next: |
126 | if (key == KEY_LEFT) |
127 | nd = rb_prev(nd); |
128 | else |
129 | nd = rb_next(nd); |
130 | continue; |
131 | } |
132 | |
133 | if (use_browser > 0) { |
134 | key = hist_entry__tui_annotate(he, evidx); |
135 | switch (key) { |
136 | case KEY_RIGHT: |
137 | next = rb_next(nd); |
138 | break; |
139 | case KEY_LEFT: |
140 | next = rb_prev(nd); |
141 | break; |
142 | default: |
143 | return; |
144 | } |
145 | |
146 | if (next != NULL) |
147 | nd = next; |
148 | } else { |
149 | hist_entry__tty_annotate(he, evidx); |
150 | nd = rb_next(nd); |
151 | /* |
152 | * Since we have a hist_entry per IP for the same |
153 | * symbol, free he->ms.sym->src to signal we already |
154 | * processed this symbol. |
155 | */ |
156 | free(notes->src); |
157 | notes->src = NULL; |
158 | } |
159 | } |
160 | } |
161 | |
162 | static struct perf_event_ops event_ops = { |
163 | .sample = process_sample_event, |
164 | .mmap = perf_event__process_mmap, |
165 | .comm = perf_event__process_comm, |
166 | .fork = perf_event__process_task, |
167 | .ordered_samples = true, |
168 | .ordering_requires_timestamps = true, |
169 | }; |
170 | |
171 | static int __cmd_annotate(void) |
172 | { |
173 | int ret; |
174 | struct perf_session *session; |
175 | struct perf_evsel *pos; |
176 | u64 total_nr_samples; |
177 | |
178 | session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops); |
179 | if (session == NULL) |
180 | return -ENOMEM; |
181 | |
182 | ret = perf_session__process_events(session, &event_ops); |
183 | if (ret) |
184 | goto out_delete; |
185 | |
186 | if (dump_trace) { |
187 | perf_session__fprintf_nr_events(session, stdout); |
188 | goto out_delete; |
189 | } |
190 | |
191 | if (verbose > 3) |
192 | perf_session__fprintf(session, stdout); |
193 | |
194 | if (verbose > 2) |
195 | perf_session__fprintf_dsos(session, stdout); |
196 | |
197 | total_nr_samples = 0; |
198 | list_for_each_entry(pos, &session->evlist->entries, node) { |
199 | struct hists *hists = &pos->hists; |
200 | u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE]; |
201 | |
202 | if (nr_samples > 0) { |
203 | total_nr_samples += nr_samples; |
204 | hists__collapse_resort(hists); |
205 | hists__output_resort(hists); |
206 | hists__find_annotations(hists, pos->idx); |
207 | } |
208 | } |
209 | |
210 | if (total_nr_samples == 0) { |
211 | ui__warning("The %s file has no samples!\n", input_name); |
212 | goto out_delete; |
213 | } |
214 | out_delete: |
215 | /* |
216 | * Speed up the exit process, for large files this can |
217 | * take quite a while. |
218 | * |
219 | * XXX Enable this when using valgrind or if we ever |
220 | * librarize this command. |
221 | * |
222 | * Also experiment with obstacks to see how much speed |
223 | * up we'll get here. |
224 | * |
225 | * perf_session__delete(session); |
226 | */ |
227 | return ret; |
228 | } |
229 | |
230 | static const char * const annotate_usage[] = { |
231 | "perf annotate [<options>] <command>", |
232 | NULL |
233 | }; |
234 | |
235 | static const struct option options[] = { |
236 | OPT_STRING('i', "input", &input_name, "file", |
237 | "input file name"), |
238 | OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", |
239 | "only consider symbols in these dsos"), |
240 | OPT_STRING('s', "symbol", &sym_hist_filter, "symbol", |
241 | "symbol to annotate"), |
242 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), |
243 | OPT_INCR('v', "verbose", &verbose, |
244 | "be more verbose (show symbol address, etc)"), |
245 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, |
246 | "dump raw trace in ASCII"), |
247 | OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"), |
248 | OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"), |
249 | OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, |
250 | "file", "vmlinux pathname"), |
251 | OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules, |
252 | "load module symbols - WARNING: use only with -k and LIVE kernel"), |
253 | OPT_BOOLEAN('l', "print-line", &print_line, |
254 | "print matching source lines (may be slow)"), |
255 | OPT_BOOLEAN('P', "full-paths", &full_paths, |
256 | "Don't shorten the displayed pathnames"), |
257 | OPT_END() |
258 | }; |
259 | |
260 | int cmd_annotate(int argc, const char **argv, const char *prefix __used) |
261 | { |
262 | argc = parse_options(argc, argv, options, annotate_usage, 0); |
263 | |
264 | if (use_stdio) |
265 | use_browser = 0; |
266 | else if (use_tui) |
267 | use_browser = 1; |
268 | |
269 | setup_browser(true); |
270 | |
271 | symbol_conf.priv_size = sizeof(struct annotation); |
272 | symbol_conf.try_vmlinux_path = true; |
273 | |
274 | if (symbol__init() < 0) |
275 | return -1; |
276 | |
277 | setup_sorting(annotate_usage, options); |
278 | |
279 | if (argc) { |
280 | /* |
281 | * Special case: if there's an argument left then assume tha |
282 | * it's a symbol filter: |
283 | */ |
284 | if (argc > 1) |
285 | usage_with_options(annotate_usage, options); |
286 | |
287 | sym_hist_filter = argv[0]; |
288 | } |
289 | |
290 | if (field_sep && *field_sep == '.') { |
291 | pr_err("'.' is the only non valid --field-separator argument\n"); |
292 | return -1; |
293 | } |
294 | |
295 | return __cmd_annotate(); |
296 | } |
297 |
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