tools/perf/util/ui/browsers/annotate.c

   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 "../../annotate.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 };
  24
  25 struct objdump_line_rb_node {
  26         struct rb_node  rb_node;
  27         double          percent;
  28         u32             idx;
  29 };
  30
  31 static inline
  32 struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)
  33 {
  34         return (struct objdump_line_rb_node *)(self + 1);
  35 }
  36
  37 static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
  38 {
  39         struct objdump_line *ol = rb_entry(entry, struct objdump_line, node);
  40         bool current_entry = ui_browser__is_current_entry(self, row);
  41         int width = self->width;
  42
  43         if (ol->offset != -1) {
  44                 struct objdump_line_rb_node *olrb = objdump_line__rb(ol);
  45                 ui_browser__set_percent_color(self, olrb->percent, current_entry);
  46                 slsmg_printf(" %7.2f ", olrb->percent);
  47         } else {
  48                 ui_browser__set_percent_color(self, 0, current_entry);
  49                 slsmg_write_nstring(" ", 9);
  50         }
  51
  52         SLsmg_write_char(':');
  53         slsmg_write_nstring(" ", 8);
  54         if (!*ol->line)
  55                 slsmg_write_nstring(" ", width - 18);
  56         else
  57                 slsmg_write_nstring(ol->line, width - 18);
  58
  59         if (!current_entry)
  60                 ui_browser__set_color(self, HE_COLORSET_CODE);
  61 }
  62
  63 static double objdump_line__calc_percent(struct objdump_line *self,
  64                                          struct symbol *sym, int evidx)
  65 {
  66         double percent = 0.0;
  67
  68         if (self->offset != -1) {
  69                 int len = sym->end - sym->start;
  70                 unsigned int hits = 0;
  71                 struct annotation *notes = symbol__annotation(sym);
  72                 struct source_line *src_line = notes->src->lines;
  73                 struct sym_hist *h = annotation__histogram(notes, evidx);
  74                 s64 offset = self->offset;
  75                 struct objdump_line *next;
  76
  77                 next = objdump__get_next_ip_line(&notes->src->source, self);
  78                 while (offset < (s64)len &&
  79                        (next == NULL || offset < next->offset)) {
  80                         if (src_line) {
  81                                 percent += src_line[offset].percent;
  82                         } else
  83                                 hits += h->addr[offset];
  84
  85                         ++offset;
  86                 }
  87                 /*
  88                  * If the percentage wasn't already calculated in
  89                  * symbol__get_source_line, do it now:
  90                  */
  91                 if (src_line == NULL && h->sum)
  92                         percent = 100.0 * hits / h->sum;
  93         }
  94
  95         return percent;
  96 }
  97
  98 static void objdump__insert_line(struct rb_root *self,
  99                                  struct objdump_line_rb_node *line)
 100 {
 101         struct rb_node **p = &self->rb_node;
 102         struct rb_node *parent = NULL;
 103         struct objdump_line_rb_node *l;
 104
 105         while (*p != NULL) {
 106                 parent = *p;
 107                 l = rb_entry(parent, struct objdump_line_rb_node, rb_node);
 108                 if (line->percent < l->percent)
 109                         p = &(*p)->rb_left;
 110                 else
 111                         p = &(*p)->rb_right;
 112         }
 113         rb_link_node(&line->rb_node, parent, p);
 114         rb_insert_color(&line->rb_node, self);
 115 }
 116
 117 static void annotate_browser__set_top(struct annotate_browser *self,
 118                                       struct rb_node *nd)
 119 {
 120         struct objdump_line_rb_node *rbpos;
 121         struct objdump_line *pos;
 122         unsigned back;
 123
 124         ui_browser__refresh_dimensions(&self->b);
 125         back = self->b.height / 2;
 126         rbpos = rb_entry(nd, struct objdump_line_rb_node, rb_node);
 127         pos = ((struct objdump_line *)rbpos) - 1;
 128         self->b.top_idx = self->b.index = rbpos->idx;
 129
 130         while (self->b.top_idx != 0 && back != 0) {
 131                 pos = list_entry(pos->node.prev, struct objdump_line, node);
 132
 133                 --self->b.top_idx;
 134                 --back;
 135         }
 136
 137         self->b.top = pos;
 138         self->curr_hot = nd;
 139 }
 140
 141 static int annotate_browser__run(struct annotate_browser *self)
 142 {
 143         struct rb_node *nd;
 144         struct symbol *sym = self->b.priv;
 145         int key;
 146
 147         if (ui_browser__show(&self->b, sym->name,
 148                              "<-, -> or ESC: exit, TAB/shift+TAB: cycle thru samples") < 0)
 149                 return -1;
 150         /*
 151          * To allow builtin-annotate to cycle thru multiple symbols by
 152          * examining the exit key for this function.
 153          */
 154         ui_browser__add_exit_key(&self->b, NEWT_KEY_RIGHT);
 155
 156         nd = self->curr_hot;
 157         if (nd) {
 158                 int tabs[] = { NEWT_KEY_TAB, NEWT_KEY_UNTAB, 0 };
 159                 ui_browser__add_exit_keys(&self->b, tabs);
 160         }
 161
 162         while (1) {
 163                 key = ui_browser__run(&self->b);
 164
 165                 switch (key) {
 166                 case NEWT_KEY_TAB:
 167                         nd = rb_prev(nd);
 168                         if (nd == NULL)
 169                                 nd = rb_last(&self->entries);
 170                         annotate_browser__set_top(self, nd);
 171                         break;
 172                 case NEWT_KEY_UNTAB:
 173                         nd = rb_next(nd);
 174                         if (nd == NULL)
 175                                 nd = rb_first(&self->entries);
 176                         annotate_browser__set_top(self, nd);
 177                         break;
 178                 default:
 179                         goto out;
 180                 }
 181         }
 182 out:
 183         ui_browser__hide(&self->b);
 184         return key;
 185 }
 186
 187 int hist_entry__tui_annotate(struct hist_entry *he, int evidx)
 188 {
 189         return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx);
 190 }
 191
 192 int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx)
 193 {
 194         struct objdump_line *pos, *n;
 195         struct objdump_line_rb_node *rbpos;
 196         struct annotation *notes = symbol__annotation(sym);
 197         struct annotate_browser browser = {
 198                 .b = {
 199                         .entries = &notes->src->source,
 200                         .refresh = ui_browser__list_head_refresh,
 201                         .seek    = ui_browser__list_head_seek,
 202                         .write   = annotate_browser__write,
 203                         .priv    = sym,
 204                 },
 205         };
 206         int ret;
 207
 208         if (sym == NULL)
 209                 return -1;
 210
 211         if (map->dso->annotate_warned)
 212                 return -1;
 213
 214         if (symbol__annotate(sym, map, sizeof(*rbpos)) < 0) {
 215                 ui__error_window(ui_helpline__last_msg);
 216                 return -1;
 217         }
 218
 219         ui_helpline__push("Press <- or ESC to exit");
 220
 221         list_for_each_entry(pos, &notes->src->source, node) {
 222                 size_t line_len = strlen(pos->line);
 223                 if (browser.b.width < line_len)
 224                         browser.b.width = line_len;
 225                 rbpos = objdump_line__rb(pos);
 226                 rbpos->idx = browser.b.nr_entries++;
 227                 rbpos->percent = objdump_line__calc_percent(pos, sym, evidx);
 228                 if (rbpos->percent < 0.01)
 229                         continue;
 230                 objdump__insert_line(&browser.entries, rbpos);
 231         }
 232
 233         /*
 234          * Position the browser at the hottest line.
 235          */
 236         browser.curr_hot = rb_last(&browser.entries);
 237         if (browser.curr_hot)
 238                 annotate_browser__set_top(&browser, browser.curr_hot);
 239
 240         browser.b.width += 18; /* Percentage */
 241         ret = annotate_browser__run(&browser);
 242         list_for_each_entry_safe(pos, n, &notes->src->source, node) {
 243                 list_del(&pos->node);
 244                 objdump_line__free(pos);
 245         }
 246         return ret;
 247 }