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                 ui_browser__set_percent_color(self, olrb->percent, current_entry);
  44                 slsmg_printf(" %7.2f ", olrb->percent);
  45                 if (!current_entry)
  46                         ui_browser__set_color(self, HE_COLORSET_CODE);
  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
  60 static double objdump_line__calc_percent(struct objdump_line *self,
  61                                          struct list_head *head,
  62                                          struct symbol *sym)
  63 {
  64         double percent = 0.0;
  65
  66         if (self->offset != -1) {
  67                 int len = sym->end - sym->start;
  68                 unsigned int hits = 0;
  69                 struct sym_priv *priv = symbol__priv(sym);
  70                 struct sym_ext *sym_ext = priv->ext;
  71                 struct sym_hist *h = priv->hist;
  72                 s64 offset = self->offset;
  73                 struct objdump_line *next = objdump__get_next_ip_line(head, self);
  74
  75
  76                 while (offset < (s64)len &&
  77                        (next == NULL || offset < next->offset)) {
  78                         if (sym_ext) {
  79                                 percent += sym_ext[offset].percent;
  80                         } else
  81                                 hits += h->ip[offset];
  82
  83                         ++offset;
  84                 }
  85
  86                 if (sym_ext == NULL && h->sum)
  87                         percent = 100.0 * hits / h->sum;
  88         }
  89
  90         return percent;
  91 }
  92
  93 static void objdump__insert_line(struct rb_root *self,
  94                                  struct objdump_line_rb_node *line)
  95 {
  96         struct rb_node **p = &self->rb_node;
  97         struct rb_node *parent = NULL;
  98         struct objdump_line_rb_node *l;
  99
 100         while (*p != NULL) {
 101                 parent = *p;
 102                 l = rb_entry(parent, struct objdump_line_rb_node, rb_node);
 103                 if (line->percent < l->percent)
 104                         p = &(*p)->rb_left;
 105                 else
 106                         p = &(*p)->rb_right;
 107         }
 108         rb_link_node(&line->rb_node, parent, p);
 109         rb_insert_color(&line->rb_node, self);
 110 }
 111
 112 static void annotate_browser__set_top(struct annotate_browser *self,
 113                                       struct rb_node *nd)
 114 {
 115         struct objdump_line_rb_node *rbpos;
 116         struct objdump_line *pos;
 117         unsigned back;
 118
 119         ui_browser__refresh_dimensions(&self->b);
 120         back = self->b.height / 2;
 121         rbpos = rb_entry(nd, struct objdump_line_rb_node, rb_node);
 122         pos = ((struct objdump_line *)rbpos) - 1;
 123         self->b.top_idx = self->b.index = rbpos->idx;
 124
 125         while (self->b.top_idx != 0 && back != 0) {
 126                 pos = list_entry(pos->node.prev, struct objdump_line, node);
 127
 128                 --self->b.top_idx;
 129                 --back;
 130         }
 131
 132         self->b.top = pos;
 133         self->curr_hot = nd;
 134 }
 135
 136 static int annotate_browser__run(struct annotate_browser *self)
 137 {
 138         struct rb_node *nd;
 139         struct hist_entry *he = self->b.priv;
 140         int key;
 141
 142         if (ui_browser__show(&self->b, he->ms.sym->name,
 143                              "<-, -> or ESC: exit, TAB/shift+TAB: cycle thru samples") < 0)
 144                 return -1;
 145         /*
 146          * To allow builtin-annotate to cycle thru multiple symbols by
 147          * examining the exit key for this function.
 148          */
 149         ui_browser__add_exit_key(&self->b, NEWT_KEY_RIGHT);
 150
 151         nd = self->curr_hot;
 152         if (nd) {
 153                 int tabs[] = { NEWT_KEY_TAB, NEWT_KEY_UNTAB, 0 };
 154                 ui_browser__add_exit_keys(&self->b, tabs);
 155         }
 156
 157         while (1) {
 158                 key = ui_browser__run(&self->b);
 159
 160                 switch (key) {
 161                 case NEWT_KEY_TAB:
 162                         nd = rb_prev(nd);
 163                         if (nd == NULL)
 164                                 nd = rb_last(&self->entries);
 165                         annotate_browser__set_top(self, nd);
 166                         break;
 167                 case NEWT_KEY_UNTAB:
 168                         nd = rb_next(nd);
 169                         if (nd == NULL)
 170                                 nd = rb_first(&self->entries);
 171                         annotate_browser__set_top(self, nd);
 172                         break;
 173                 default:
 174                         goto out;
 175                 }
 176         }
 177 out:
 178         ui_browser__hide(&self->b);
 179         return key;
 180 }
 181
 182 int hist_entry__tui_annotate(struct hist_entry *self)
 183 {
 184         struct objdump_line *pos, *n;
 185         struct objdump_line_rb_node *rbpos;
 186         LIST_HEAD(head);
 187         struct annotate_browser browser = {
 188                 .b = {
 189                         .entries = &head,
 190                         .refresh = ui_browser__list_head_refresh,
 191                         .seek    = ui_browser__list_head_seek,
 192                         .write   = annotate_browser__write,
 193                         .priv    = self,
 194                 },
 195         };
 196         int ret;
 197
 198         if (self->ms.sym == NULL)
 199                 return -1;
 200
 201         if (self->ms.map->dso->annotate_warned)
 202                 return -1;
 203
 204         if (hist_entry__annotate(self, &head, sizeof(*rbpos)) < 0) {
 205                 ui__error_window(ui_helpline__last_msg);
 206                 return -1;
 207         }
 208
 209         ui_helpline__push("Press <- or ESC to exit");
 210
 211         list_for_each_entry(pos, &head, node) {
 212                 size_t line_len = strlen(pos->line);
 213                 if (browser.b.width < line_len)
 214                         browser.b.width = line_len;
 215                 rbpos = objdump_line__rb(pos);
 216                 rbpos->idx = browser.b.nr_entries++;
 217                 rbpos->percent = objdump_line__calc_percent(pos, &head, self->ms.sym);
 218                 if (rbpos->percent < 0.01)
 219                         continue;
 220                 objdump__insert_line(&browser.entries, rbpos);
 221         }
 222
 223         /*
 224          * Position the browser at the hottest line.
 225          */
 226         browser.curr_hot = rb_last(&browser.entries);
 227         if (browser.curr_hot)
 228                 annotate_browser__set_top(&browser, browser.curr_hot);
 229
 230         browser.b.width += 18; /* Percentage */
 231         ret = annotate_browser__run(&browser);
 232         list_for_each_entry_safe(pos, n, &head, node) {
 233                 list_del(&pos->node);
 234                 objdump_line__free(pos);
 235         }
 236         return ret;
 237 }