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