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perf annotate browser: Allow toggling the visualization of source code lines
[linux-2.6/linux-mips.git] / tools / perf / util / ui / browsers / annotate.c
blobeb2712ecb6011403f0c2c6108eea4016e5e57751
1 #include "../browser.h"
2 #include "../helpline.h"
3 #include "../libslang.h"
4 #include "../../annotate.h"
5 #include "../../hist.h"
6 #include "../../sort.h"
7 #include "../../symbol.h"
8 #include <pthread.h>
9
10 static void ui__error_window(const char *fmt, ...)
11 {
12 va_list ap;
13
14 va_start(ap, fmt);
15 newtWinMessagev((char *)"Error", (char *)"Ok", (char *)fmt, ap);
16 va_end(ap);
17 }
18
19 struct annotate_browser {
20 struct ui_browser b;
21 struct rb_root entries;
22 struct rb_node *curr_hot;
23 struct objdump_line *selection;
24 int nr_asm_entries;
25 int nr_entries;
26 bool hide_src_code;
27 };
28
29 struct objdump_line_rb_node {
30 struct rb_node rb_node;
31 double percent;
32 u32 idx;
33 int idx_asm;
34 };
35
36 static inline
37 struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)
38 {
39 return (struct objdump_line_rb_node *)(self + 1);
40 }
41
42 static bool objdump_line__filter(struct ui_browser *browser, void *entry)
43 {
44 struct annotate_browser *ab = container_of(browser, struct annotate_browser, b);
45
46 if (ab->hide_src_code) {
47 struct objdump_line *ol = list_entry(entry, struct objdump_line, node);
48 return ol->offset == -1;
49 }
50
51 return false;
52 }
53
54 static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
55 {
56 struct annotate_browser *ab = container_of(self, struct annotate_browser, b);
57 struct objdump_line *ol = list_entry(entry, struct objdump_line, node);
58 bool current_entry = ui_browser__is_current_entry(self, row);
59 int width = self->width;
60
61 if (ol->offset != -1) {
62 struct objdump_line_rb_node *olrb = objdump_line__rb(ol);
63 ui_browser__set_percent_color(self, olrb->percent, current_entry);
64 slsmg_printf(" %7.2f ", olrb->percent);
65 } else {
66 ui_browser__set_percent_color(self, 0, current_entry);
67 slsmg_write_nstring(" ", 9);
68 }
69
70 SLsmg_write_char(':');
71 slsmg_write_nstring(" ", 8);
72 if (!*ol->line)
73 slsmg_write_nstring(" ", width - 18);
74 else
75 slsmg_write_nstring(ol->line, width - 18);
76
77 if (!current_entry)
78 ui_browser__set_color(self, HE_COLORSET_CODE);
79 else
80 ab->selection = ol;
81 }
82
83 static double objdump_line__calc_percent(struct objdump_line *self,
84 struct symbol *sym, int evidx)
85 {
86 double percent = 0.0;
87
88 if (self->offset != -1) {
89 int len = sym->end - sym->start;
90 unsigned int hits = 0;
91 struct annotation *notes = symbol__annotation(sym);
92 struct source_line *src_line = notes->src->lines;
93 struct sym_hist *h = annotation__histogram(notes, evidx);
94 s64 offset = self->offset;
95 struct objdump_line *next;
96
97 next = objdump__get_next_ip_line(&notes->src->source, self);
98 while (offset < (s64)len &&
99 (next == NULL || offset < next->offset)) {
100 if (src_line) {
101 percent += src_line[offset].percent;
102 } else
103 hits += h->addr[offset];
104
105 ++offset;
106 }
107 /*
108 * If the percentage wasn't already calculated in
109 * symbol__get_source_line, do it now:
110 */
111 if (src_line == NULL && h->sum)
112 percent = 100.0 * hits / h->sum;
113 }
114
115 return percent;
116 }
117
118 static void objdump__insert_line(struct rb_root *self,
119 struct objdump_line_rb_node *line)
120 {
121 struct rb_node **p = &self->rb_node;
122 struct rb_node *parent = NULL;
123 struct objdump_line_rb_node *l;
124
125 while (*p != NULL) {
126 parent = *p;
127 l = rb_entry(parent, struct objdump_line_rb_node, rb_node);
128 if (line->percent < l->percent)
129 p = &(*p)->rb_left;
130 else
131 p = &(*p)->rb_right;
132 }
133 rb_link_node(&line->rb_node, parent, p);
134 rb_insert_color(&line->rb_node, self);
135 }
136
137 static void annotate_browser__set_top(struct annotate_browser *self,
138 struct rb_node *nd)
139 {
140 struct objdump_line_rb_node *rbpos;
141 struct objdump_line *pos;
142 unsigned back;
143
144 ui_browser__refresh_dimensions(&self->b);
145 back = self->b.height / 2;
146 rbpos = rb_entry(nd, struct objdump_line_rb_node, rb_node);
147 pos = ((struct objdump_line *)rbpos) - 1;
148 self->b.top_idx = self->b.index = rbpos->idx;
149
150 while (self->b.top_idx != 0 && back != 0) {
151 pos = list_entry(pos->node.prev, struct objdump_line, node);
152
153 --self->b.top_idx;
154 --back;
155 }
156
157 self->b.top = pos;
158 self->curr_hot = nd;
159 }
160
161 static void annotate_browser__calc_percent(struct annotate_browser *browser,
162 int evidx)
163 {
164 struct map_symbol *ms = browser->b.priv;
165 struct symbol *sym = ms->sym;
166 struct annotation *notes = symbol__annotation(sym);
167 struct objdump_line *pos;
168
169 browser->entries = RB_ROOT;
170
171 pthread_mutex_lock(&notes->lock);
172
173 list_for_each_entry(pos, &notes->src->source, node) {
174 struct objdump_line_rb_node *rbpos = objdump_line__rb(pos);
175 rbpos->percent = objdump_line__calc_percent(pos, sym, evidx);
176 if (rbpos->percent < 0.01) {
177 RB_CLEAR_NODE(&rbpos->rb_node);
178 continue;
179 }
180 objdump__insert_line(&browser->entries, rbpos);
181 }
182 pthread_mutex_unlock(&notes->lock);
183
184 browser->curr_hot = rb_last(&browser->entries);
185 }
186
187 static bool annotate_browser__toggle_source(struct annotate_browser *browser)
188 {
189 struct objdump_line *ol;
190 struct objdump_line_rb_node *olrb;
191 off_t offset = browser->b.index - browser->b.top_idx;
192
193 browser->b.seek(&browser->b, offset, SEEK_CUR);
194 ol = list_entry(browser->b.top, struct objdump_line, node);
195 olrb = objdump_line__rb(ol);
196
197 if (browser->hide_src_code) {
198 if (olrb->idx_asm < offset)
199 offset = olrb->idx;
200
201 browser->b.nr_entries = browser->nr_entries;
202 browser->hide_src_code = false;
203 browser->b.seek(&browser->b, -offset, SEEK_CUR);
204 browser->b.top_idx = olrb->idx - offset;
205 browser->b.index = olrb->idx;
206 } else {
207 if (olrb->idx_asm < 0) {
208 ui_helpline__puts("Only available for assembly lines.");
209 browser->b.seek(&browser->b, -offset, SEEK_CUR);
210 return false;
211 }
212
213 if (olrb->idx_asm < offset)
214 offset = olrb->idx_asm;
215
216 browser->b.nr_entries = browser->nr_asm_entries;
217 browser->hide_src_code = true;
218 browser->b.seek(&browser->b, -offset, SEEK_CUR);
219 browser->b.top_idx = olrb->idx_asm - offset;
220 browser->b.index = olrb->idx_asm;
221 }
222
223 return true;
224 }
225
226 static int annotate_browser__run(struct annotate_browser *self, int evidx,
227 int nr_events, void(*timer)(void *arg),
228 void *arg, int delay_secs)
229 {
230 struct rb_node *nd = NULL;
231 struct map_symbol *ms = self->b.priv;
232 struct symbol *sym = ms->sym;
233 const char *help = "<-, ESC: exit, TAB/shift+TAB: cycle hottest lines, "
234 "H: Hottest, -> Line action, S -> Toggle source "
235 "code view";
236 int key;
237
238 if (ui_browser__show(&self->b, sym->name, help) < 0)
239 return -1;
240
241 annotate_browser__calc_percent(self, evidx);
242
243 if (self->curr_hot)
244 annotate_browser__set_top(self, self->curr_hot);
245
246 nd = self->curr_hot;
247
248 while (1) {
249 key = ui_browser__run(&self->b, delay_secs);
250
251 if (delay_secs != 0) {
252 annotate_browser__calc_percent(self, evidx);
253 /*
254 * Current line focus got out of the list of most active
255 * lines, NULL it so that if TAB|UNTAB is pressed, we
256 * move to curr_hot (current hottest line).
257 */
258 if (nd != NULL && RB_EMPTY_NODE(nd))
259 nd = NULL;
260 }
261
262 switch (key) {
263 case -1:
264 /*
265 * FIXME we need to check if it was
266 * es.reason == NEWT_EXIT_TIMER
267 */
268 if (timer != NULL)
269 timer(arg);
270
271 if (delay_secs != 0)
272 symbol__annotate_decay_histogram(sym, evidx);
273 continue;
274 case NEWT_KEY_TAB:
275 if (nd != NULL) {
276 nd = rb_prev(nd);
277 if (nd == NULL)
278 nd = rb_last(&self->entries);
279 } else
280 nd = self->curr_hot;
281 break;
282 case NEWT_KEY_UNTAB:
283 if (nd != NULL)
284 nd = rb_next(nd);
285 if (nd == NULL)
286 nd = rb_first(&self->entries);
287 else
288 nd = self->curr_hot;
289 break;
290 case 'H':
291 nd = self->curr_hot;
292 break;
293 case 'S':
294 if (annotate_browser__toggle_source(self))
295 ui_helpline__puts(help);
296 continue;
297 case NEWT_KEY_ENTER:
298 case NEWT_KEY_RIGHT:
299 if (self->selection == NULL) {
300 ui_helpline__puts("Huh? No selection. Report to linux-kernel@vger.kernel.org");
301 continue;
302 }
303
304 if (self->selection->offset == -1) {
305 ui_helpline__puts("Actions are only available for assembly lines.");
306 continue;
307 } else {
308 char *s = strstr(self->selection->line, "callq ");
309 struct annotation *notes;
310 struct symbol *target;
311 u64 ip;
312
313 if (s == NULL) {
314 ui_helpline__puts("Actions are only available for the 'callq' instruction.");
315 continue;
316 }
317
318 s = strchr(s, ' ');
319 if (s++ == NULL) {
320 ui_helpline__puts("Invallid callq instruction.");
321 continue;
322 }
323
324 ip = strtoull(s, NULL, 16);
325 ip = ms->map->map_ip(ms->map, ip);
326 target = map__find_symbol(ms->map, ip, NULL);
327 if (target == NULL) {
328 ui_helpline__puts("The called function was not found.");
329 continue;
330 }
331
332 notes = symbol__annotation(target);
333 pthread_mutex_lock(&notes->lock);
334
335 if (notes->src == NULL &&
336 symbol__alloc_hist(target, nr_events) < 0) {
337 pthread_mutex_unlock(&notes->lock);
338 ui__warning("Not enough memory for annotating '%s' symbol!\n",
339 target->name);
340 continue;
341 }
342
343 pthread_mutex_unlock(&notes->lock);
344 symbol__tui_annotate(target, ms->map, evidx, nr_events,
345 timer, arg, delay_secs);
346 }
347 break;
348 case NEWT_KEY_LEFT:
349 case NEWT_KEY_ESCAPE:
350 case 'q':
351 case CTRL('c'):
352 goto out;
353 default:
354 continue;
355 }
356
357 if (nd != NULL)
358 annotate_browser__set_top(self, nd);
359 }
360 out:
361 ui_browser__hide(&self->b);
362 return key;
363 }
364
365 int hist_entry__tui_annotate(struct hist_entry *he, int evidx, int nr_events,
366 void(*timer)(void *arg), void *arg, int delay_secs)
367 {
368 return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx, nr_events,
369 timer, arg, delay_secs);
370 }
371
372 int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
373 int nr_events, void(*timer)(void *arg), void *arg,
374 int delay_secs)
375 {
376 struct objdump_line *pos, *n;
377 struct annotation *notes;
378 struct map_symbol ms = {
379 .map = map,
380 .sym = sym,
381 };
382 struct annotate_browser browser = {
383 .b = {
384 .refresh = ui_browser__list_head_refresh,
385 .seek = ui_browser__list_head_seek,
386 .write = annotate_browser__write,
387 .filter = objdump_line__filter,
388 .priv = &ms,
389 },
390 };
391 int ret;
392
393 if (sym == NULL)
394 return -1;
395
396 if (map->dso->annotate_warned)
397 return -1;
398
399 if (symbol__annotate(sym, map, sizeof(struct objdump_line_rb_node)) < 0) {
400 ui__error_window(ui_helpline__last_msg);
401 return -1;
402 }
403
404 ui_helpline__push("Press <- or ESC to exit");
405
406 notes = symbol__annotation(sym);
407
408 list_for_each_entry(pos, &notes->src->source, node) {
409 struct objdump_line_rb_node *rbpos;
410 size_t line_len = strlen(pos->line);
411
412 if (browser.b.width < line_len)
413 browser.b.width = line_len;
414 rbpos = objdump_line__rb(pos);
415 rbpos->idx = browser.nr_entries++;
416 if (pos->offset != -1)
417 rbpos->idx_asm = browser.nr_asm_entries++;
418 else
419 rbpos->idx_asm = -1;
420 }
421
422 browser.b.nr_entries = browser.nr_entries;
423 browser.b.entries = &notes->src->source,
424 browser.b.width += 18; /* Percentage */
425 ret = annotate_browser__run(&browser, evidx, nr_events,
426 timer, arg, delay_secs);
427 list_for_each_entry_safe(pos, n, &notes->src->source, node) {
428 list_del(&pos->node);
429 objdump_line__free(pos);
430 }
431 return ret;
432 }
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