perf report: Fix segmentation fault when running with '-g none'
[linux-2.6.git] / tools / perf / builtin-report.c
1 /*
2  * builtin-report.c
3  *
4  * Builtin report 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/color.h"
13 #include <linux/list.h>
14 #include "util/cache.h"
15 #include <linux/rbtree.h>
16 #include "util/symbol.h"
17 #include "util/string.h"
18 #include "util/callchain.h"
19 #include "util/strlist.h"
20 #include "util/values.h"
21
22 #include "perf.h"
23 #include "util/debug.h"
24 #include "util/header.h"
25 #include "util/session.h"
26
27 #include "util/parse-options.h"
28 #include "util/parse-events.h"
29
30 #include "util/thread.h"
31 #include "util/sort.h"
32 #include "util/hist.h"
33
34 static char             const *input_name = "perf.data";
35
36 static int              force;
37
38 static int              show_threads;
39 static struct perf_read_values  show_threads_values;
40
41 static char             default_pretty_printing_style[] = "normal";
42 static char             *pretty_printing_style = default_pretty_printing_style;
43
44 static char             callchain_default_opt[] = "fractal,0.5";
45
46 static int perf_session__add_hist_entry(struct perf_session *self,
47                                         struct addr_location *al,
48                                         struct ip_callchain *chain, u64 count)
49 {
50         struct symbol **syms = NULL, *parent = NULL;
51         bool hit;
52         struct hist_entry *he;
53
54         if ((sort__has_parent || symbol_conf.use_callchain) && chain)
55                 syms = perf_session__resolve_callchain(self, al->thread,
56                                                        chain, &parent);
57         he = __perf_session__add_hist_entry(self, al, parent, count, &hit);
58         if (he == NULL)
59                 return -ENOMEM;
60
61         if (hit)
62                 he->count += count;
63
64         if (symbol_conf.use_callchain) {
65                 if (!hit)
66                         callchain_init(&he->callchain);
67                 append_chain(&he->callchain, chain, syms);
68                 free(syms);
69         }
70
71         return 0;
72 }
73
74 static int validate_chain(struct ip_callchain *chain, event_t *event)
75 {
76         unsigned int chain_size;
77
78         chain_size = event->header.size;
79         chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
80
81         if (chain->nr*sizeof(u64) > chain_size)
82                 return -1;
83
84         return 0;
85 }
86
87 static int process_sample_event(event_t *event, struct perf_session *session)
88 {
89         struct sample_data data = { .period = 1, };
90         struct addr_location al;
91
92         event__parse_sample(event, session->sample_type, &data);
93
94         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
95                 event->header.misc,
96                 data.pid, data.tid,
97                 (void *)(long)data.ip,
98                 (long long)data.period);
99
100         if (session->sample_type & PERF_SAMPLE_CALLCHAIN) {
101                 unsigned int i;
102
103                 dump_printf("... chain: nr:%Lu\n", data.callchain->nr);
104
105                 if (validate_chain(data.callchain, event) < 0) {
106                         pr_debug("call-chain problem with event, "
107                                  "skipping it.\n");
108                         return 0;
109                 }
110
111                 if (dump_trace) {
112                         for (i = 0; i < data.callchain->nr; i++)
113                                 dump_printf("..... %2d: %016Lx\n",
114                                             i, data.callchain->ips[i]);
115                 }
116         }
117
118         if (event__preprocess_sample(event, session, &al, NULL) < 0) {
119                 fprintf(stderr, "problem processing %d event, skipping it.\n",
120                         event->header.type);
121                 return -1;
122         }
123
124         if (al.filtered)
125                 return 0;
126
127         if (perf_session__add_hist_entry(session, &al, data.callchain, data.period)) {
128                 pr_debug("problem incrementing symbol count, skipping event\n");
129                 return -1;
130         }
131
132         session->events_stats.total += data.period;
133         return 0;
134 }
135
136 static int process_read_event(event_t *event, struct perf_session *session __used)
137 {
138         struct perf_event_attr *attr;
139
140         attr = perf_header__find_attr(event->read.id, &session->header);
141
142         if (show_threads) {
143                 const char *name = attr ? __event_name(attr->type, attr->config)
144                                    : "unknown";
145                 perf_read_values_add_value(&show_threads_values,
146                                            event->read.pid, event->read.tid,
147                                            event->read.id,
148                                            name,
149                                            event->read.value);
150         }
151
152         dump_printf(": %d %d %s %Lu\n", event->read.pid, event->read.tid,
153                     attr ? __event_name(attr->type, attr->config) : "FAIL",
154                     event->read.value);
155
156         return 0;
157 }
158
159 static int sample_type_check(struct perf_session *session)
160 {
161         if (!(session->sample_type & PERF_SAMPLE_CALLCHAIN)) {
162                 if (sort__has_parent) {
163                         fprintf(stderr, "selected --sort parent, but no"
164                                         " callchain data. Did you call"
165                                         " perf record without -g?\n");
166                         return -1;
167                 }
168                 if (symbol_conf.use_callchain) {
169                         fprintf(stderr, "selected -g but no callchain data."
170                                         " Did you call perf record without"
171                                         " -g?\n");
172                         return -1;
173                 }
174         } else if (callchain_param.mode != CHAIN_NONE && !symbol_conf.use_callchain) {
175                         symbol_conf.use_callchain = true;
176                         if (register_callchain_param(&callchain_param) < 0) {
177                                 fprintf(stderr, "Can't register callchain"
178                                                 " params\n");
179                                 return -1;
180                         }
181         }
182
183         return 0;
184 }
185
186 static struct perf_event_ops event_ops = {
187         .process_sample_event   = process_sample_event,
188         .process_mmap_event     = event__process_mmap,
189         .process_comm_event     = event__process_comm,
190         .process_exit_event     = event__process_task,
191         .process_fork_event     = event__process_task,
192         .process_lost_event     = event__process_lost,
193         .process_read_event     = process_read_event,
194         .sample_type_check      = sample_type_check,
195 };
196
197
198 static int __cmd_report(void)
199 {
200         int ret;
201         struct perf_session *session;
202
203         session = perf_session__new(input_name, O_RDONLY, force);
204         if (session == NULL)
205                 return -ENOMEM;
206
207         if (show_threads)
208                 perf_read_values_init(&show_threads_values);
209
210         ret = perf_session__process_events(session, &event_ops);
211         if (ret)
212                 goto out_delete;
213
214         if (dump_trace) {
215                 event__print_totals();
216                 goto out_delete;
217         }
218
219         if (verbose > 3)
220                 perf_session__fprintf(session, stdout);
221
222         if (verbose > 2)
223                 dsos__fprintf(stdout);
224
225         perf_session__collapse_resort(session);
226         perf_session__output_resort(session, session->events_stats.total);
227         fprintf(stdout, "# Samples: %Ld\n#\n", session->events_stats.total);
228         perf_session__fprintf_hists(session, NULL, false, stdout);
229         if (sort_order == default_sort_order &&
230             parent_pattern == default_parent_pattern)
231                 fprintf(stdout, "#\n# (For a higher level overview, try: perf report --sort comm,dso)\n#\n");
232
233         if (show_threads) {
234                 bool raw_printing_style = !strcmp(pretty_printing_style, "raw");
235                 perf_read_values_display(stdout, &show_threads_values,
236                                          raw_printing_style);
237                 perf_read_values_destroy(&show_threads_values);
238         }
239 out_delete:
240         perf_session__delete(session);
241         return ret;
242 }
243
244 static int
245 parse_callchain_opt(const struct option *opt __used, const char *arg,
246                     int unset __used)
247 {
248         char *tok;
249         char *endptr;
250
251         symbol_conf.use_callchain = true;
252
253         if (!arg)
254                 return 0;
255
256         tok = strtok((char *)arg, ",");
257         if (!tok)
258                 return -1;
259
260         /* get the output mode */
261         if (!strncmp(tok, "graph", strlen(arg)))
262                 callchain_param.mode = CHAIN_GRAPH_ABS;
263
264         else if (!strncmp(tok, "flat", strlen(arg)))
265                 callchain_param.mode = CHAIN_FLAT;
266
267         else if (!strncmp(tok, "fractal", strlen(arg)))
268                 callchain_param.mode = CHAIN_GRAPH_REL;
269
270         else if (!strncmp(tok, "none", strlen(arg))) {
271                 callchain_param.mode = CHAIN_NONE;
272                 symbol_conf.use_callchain = false;
273
274                 return 0;
275         }
276
277         else
278                 return -1;
279
280         /* get the min percentage */
281         tok = strtok(NULL, ",");
282         if (!tok)
283                 goto setup;
284
285         callchain_param.min_percent = strtod(tok, &endptr);
286         if (tok == endptr)
287                 return -1;
288
289 setup:
290         if (register_callchain_param(&callchain_param) < 0) {
291                 fprintf(stderr, "Can't register callchain params\n");
292                 return -1;
293         }
294         return 0;
295 }
296
297 static const char * const report_usage[] = {
298         "perf report [<options>] <command>",
299         NULL
300 };
301
302 static const struct option options[] = {
303         OPT_STRING('i', "input", &input_name, "file",
304                     "input file name"),
305         OPT_BOOLEAN('v', "verbose", &verbose,
306                     "be more verbose (show symbol address, etc)"),
307         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
308                     "dump raw trace in ASCII"),
309         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
310                    "file", "vmlinux pathname"),
311         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
312         OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
313                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
314         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
315                     "Show a column with the number of samples"),
316         OPT_BOOLEAN('T', "threads", &show_threads,
317                     "Show per-thread event counters"),
318         OPT_STRING(0, "pretty", &pretty_printing_style, "key",
319                    "pretty printing style key: normal raw"),
320         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
321                    "sort by key(s): pid, comm, dso, symbol, parent"),
322         OPT_BOOLEAN('P', "full-paths", &event_ops.full_paths,
323                     "Don't shorten the pathnames taking into account the cwd"),
324         OPT_STRING('p', "parent", &parent_pattern, "regex",
325                    "regex filter to identify parent, see: '--sort parent'"),
326         OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
327                     "Only display entries with parent-match"),
328         OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
329                      "Display callchains using output_type and min percent threshold. "
330                      "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
331         OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
332                    "only consider symbols in these dsos"),
333         OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
334                    "only consider symbols in these comms"),
335         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
336                    "only consider these symbols"),
337         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
338                    "width[,width...]",
339                    "don't try to adjust column width, use these fixed values"),
340         OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
341                    "separator for columns, no spaces will be added between "
342                    "columns '.' is reserved."),
343         OPT_END()
344 };
345
346 int cmd_report(int argc, const char **argv, const char *prefix __used)
347 {
348         argc = parse_options(argc, argv, options, report_usage, 0);
349
350         setup_pager();
351
352         if (symbol__init() < 0)
353                 return -1;
354
355         setup_sorting(report_usage, options);
356
357         if (parent_pattern != default_parent_pattern) {
358                 sort_dimension__add("parent");
359                 sort_parent.elide = 1;
360         } else
361                 symbol_conf.exclude_other = false;
362
363         /*
364          * Any (unrecognized) arguments left?
365          */
366         if (argc)
367                 usage_with_options(report_usage, options);
368
369         sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
370         sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
371         sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
372
373         return __cmd_report();
374 }