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

   1 #include "../browser.h"
   2 #include "../helpline.h"
   3 #include "../libslang.h"
   4 #include "../../hist.h"
   5 #include "../../sort.h"
   6 #include "../../symbol.h"
   7
   8 static void ui__error_window(const char *fmt, ...)
   9 {
  10         va_list ap;
  11
  12         va_start(ap, fmt);
  13         newtWinMessagev((char *)"Error", (char *)"Ok", (char *)fmt, ap);
  14         va_end(ap);
  15 }
  16
  17 struct annotate_browser {
  18         struct ui_browser b;
  19         struct rb_root    entries;
  20         struct rb_node    *curr_hot;
  21 };
  22
  23 struct objdump_line_rb_node {
  24         struct rb_node  rb_node;
  25         double          percent;
  26         u32             idx;
  27 };
  28
  29 static inline
  30 struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)
  31 {
  32         return (struct objdump_line_rb_node *)(self + 1);
  33 }
  34
  35 static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
  36 {
  37         struct objdump_line *ol = rb_entry(entry, struct objdump_line, node);
  38         bool current_entry = ui_browser__is_current_entry(self, row);
  39         int width = self->width;
  40
  41         if (ol->offset != -1) {
  42                 struct objdump_line_rb_node *olrb = objdump_line__rb(ol);
  43                 int color = ui_browser__percent_color(olrb->percent, current_entry);
  44                 SLsmg_set_color(color);
  45                 slsmg_printf(" %7.2f ", olrb->percent);
  46                 if (!current_entry)
  47                         SLsmg_set_color(HE_COLORSET_CODE);
  48         } else {
  49                 int color = ui_browser__percent_color(0, current_entry);
  50                 SLsmg_set_color(color);
  51                 slsmg_write_nstring(" ", 9);
  52         }
  53
  54         SLsmg_write_char(':');
  55         slsmg_write_nstring(" ", 8);
  56         if (!*ol->line)
  57                 slsmg_write_nstring(" ", width - 18);
  58         else
  59                 slsmg_write_nstring(ol->line, width - 18);
  60 }
  61
  62 static double objdump_line__calc_percent(struct objdump_line *self,
  63                                          struct list_head *head,
  64                                          struct symbol *sym)
  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 sym_priv *priv = symbol__priv(sym);
  72                 struct sym_ext *sym_ext = priv->ext;
  73                 struct sym_hist *h = priv->hist;
  74                 s64 offset = self->offset;
  75                 struct objdump_line *next = objdump__get_next_ip_line(head, self);
  76
  77
  78                 while (offset < (s64)len &&
  79                        (next == NULL || offset < next->offset)) {
  80                         if (sym_ext) {
  81                                 percent += sym_ext[offset].percent;
  82                         } else
  83                                 hits += h->ip[offset];
  84
  85                         ++offset;
  86                 }
  87
  88                 if (sym_ext == NULL && h->sum)
  89                         percent = 100.0 * hits / h->sum;
  90         }
  91
  92         return percent;
  93 }
  94
  95 static void objdump__insert_line(struct rb_root *self,
  96                                  struct objdump_line_rb_node *line)
  97 {
  98         struct rb_node **p = &self->rb_node;
  99         struct rb_node *parent = NULL;
 100         struct objdump_line_rb_node *l;
 101
 102         while (*p != NULL) {
 103                 parent = *p;
 104                 l = rb_entry(parent, struct objdump_line_rb_node, rb_node);
 105                 if (line->percent < l->percent)
 106                         p = &(*p)->rb_left;
 107                 else
 108                         p = &(*p)->rb_right;
 109         }
 110         rb_link_node(&line->rb_node, parent, p);
 111         rb_insert_color(&line->rb_node, self);
 112 }
 113
 114 static void annotate_browser__set_top(struct annotate_browser *self,
 115                                       struct rb_node *nd)
 116 {
 117         struct objdump_line_rb_node *rbpos;
 118         struct objdump_line *pos;
 119         unsigned back;
 120
 121         ui_browser__refresh_dimensions(&self->b);
 122         back = self->b.height / 2;
 123         rbpos = rb_entry(nd, struct objdump_line_rb_node, rb_node);
 124         pos = ((struct objdump_line *)rbpos) - 1;
 125         self->b.top_idx = self->b.index = rbpos->idx;
 126
 127         while (self->b.top_idx != 0 && back != 0) {
 128                 pos = list_entry(pos->node.prev, struct objdump_line, node);
 129
 130                 --self->b.top_idx;
 131                 --back;
 132         }
 133
 134         self->b.top = pos;
 135         self->curr_hot = nd;
 136 }
 137
 138 static int annotate_browser__run(struct annotate_browser *self,
 139                                  struct newtExitStruct *es)
 140 {
 141         struct rb_node *nd;
 142         struct hist_entry *he = self->b.priv;
 143
 144         if (ui_browser__show(&self->b, he->ms.sym->name,
 145                              "<- or ESC: exit, TAB/shift+TAB: cycle thru samples") < 0)
 146                 return -1;
 147
 148         newtFormAddHotKey(self->b.form, NEWT_KEY_LEFT);
 149
 150         nd = self->curr_hot;
 151         if (nd) {
 152                 newtFormAddHotKey(self->b.form, NEWT_KEY_TAB);
 153                 newtFormAddHotKey(self->b.form, NEWT_KEY_UNTAB);
 154         }
 155
 156         while (1) {
 157                 ui_browser__run(&self->b, es);
 158
 159                 if (es->reason != NEWT_EXIT_HOTKEY)
 160                         break;
 161
 162                 switch (es->u.key) {
 163                 case NEWT_KEY_TAB:
 164                         nd = rb_prev(nd);
 165                         if (nd == NULL)
 166                                 nd = rb_last(&self->entries);
 167                         annotate_browser__set_top(self, nd);
 168                         break;
 169                 case NEWT_KEY_UNTAB:
 170                         nd = rb_next(nd);
 171                         if (nd == NULL)
 172                                 nd = rb_first(&self->entries);
 173                         annotate_browser__set_top(self, nd);
 174                         break;
 175                 default:
 176                         goto out;
 177                 }
 178         }
 179 out:
 180         ui_browser__hide(&self->b);
 181         return 0;
 182 }
 183
 184 int hist_entry__tui_annotate(struct hist_entry *self)
 185 {
 186         struct newtExitStruct es;
 187         struct objdump_line *pos, *n;
 188         struct objdump_line_rb_node *rbpos;
 189         LIST_HEAD(head);
 190         struct annotate_browser browser = {
 191                 .b = {
 192                         .entries = &head,
 193                         .refresh = ui_browser__list_head_refresh,
 194                         .seek    = ui_browser__list_head_seek,
 195                         .write   = annotate_browser__write,
 196                         .priv    = self,
 197                 },
 198         };
 199         int ret;
 200
 201         if (self->ms.sym == NULL)
 202                 return -1;
 203
 204         if (self->ms.map->dso->annotate_warned)
 205                 return -1;
 206
 207         if (hist_entry__annotate(self, &head, sizeof(*rbpos)) < 0) {
 208                 ui__error_window(ui_helpline__last_msg);
 209                 return -1;
 210         }
 211
 212         ui_helpline__push("Press <- or ESC to exit");
 213
 214         list_for_each_entry(pos, &head, node) {
 215                 size_t line_len = strlen(pos->line);
 216                 if (browser.b.width < line_len)
 217                         browser.b.width = line_len;
 218                 rbpos = objdump_line__rb(pos);
 219                 rbpos->idx = browser.b.nr_entries++;
 220                 rbpos->percent = objdump_line__calc_percent(pos, &head, self->ms.sym);
 221                 if (rbpos->percent < 0.01)
 222                         continue;
 223                 objdump__insert_line(&browser.entries, rbpos);
 224         }
 225
 226         /*
 227          * Position the browser at the hottest line.
 228          */
 229         browser.curr_hot = rb_last(&browser.entries);
 230         if (browser.curr_hot)
 231                 annotate_browser__set_top(&browser, browser.curr_hot);
 232
 233         browser.b.width += 18; /* Percentage */
 234         ret = annotate_browser__run(&browser, &es);
 235         list_for_each_entry_safe(pos, n, &head, node) {
 236                 list_del(&pos->node);
 237                 objdump_line__free(pos);
 238         }
 239         return ret;
 240 }