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      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 };
     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 void annotate_browser__calc_percent(struct annotate_browser *browser,
    142 					   int evidx)
    143 {
    144 	struct symbol *sym = browser->b.priv;
    145 	struct annotation *notes = symbol__annotation(sym);
    146 	struct objdump_line *pos;
    147 
    148 	browser->entries = RB_ROOT;
    149 
    150 	pthread_mutex_lock(&notes->lock);
    151 
    152 	list_for_each_entry(pos, &notes->src->source, node) {
    153 		struct objdump_line_rb_node *rbpos = objdump_line__rb(pos);
    154 		rbpos->percent = objdump_line__calc_percent(pos, sym, evidx);
    155 		if (rbpos->percent < 0.01) {
    156 			RB_CLEAR_NODE(&rbpos->rb_node);
    157 			continue;
    158 		}
    159 		objdump__insert_line(&browser->entries, rbpos);
    160 	}
    161 	pthread_mutex_unlock(&notes->lock);
    162 
    163 	browser->curr_hot = rb_last(&browser->entries);
    164 }
    165 
    166 static int annotate_browser__run(struct annotate_browser *self, int evidx,
    167 				 int refresh)
    168 {
    169 	struct rb_node *nd = NULL;
    170 	struct symbol *sym = self->b.priv;
    171 	/*
    172 	 * RIGHT To allow builtin-annotate to cycle thru multiple symbols by
    173 	 * examining the exit key for this function.
    174 	 */
    175 	int exit_keys[] = { 'H', NEWT_KEY_TAB, NEWT_KEY_UNTAB,
    176 			    NEWT_KEY_RIGHT, 0 };
    177 	int key;
    178 
    179 	if (ui_browser__show(&self->b, sym->name,
    180 			     "<-, -> or ESC: exit, TAB/shift+TAB: "
    181 			     "cycle hottest lines, H: Hottest") < 0)
    182 		return -1;
    183 
    184 	ui_browser__add_exit_keys(&self->b, exit_keys);
    185 	annotate_browser__calc_percent(self, evidx);
    186 
    187 	if (self->curr_hot)
    188 		annotate_browser__set_top(self, self->curr_hot);
    189 
    190 	nd = self->curr_hot;
    191 
    192 	if (refresh != 0)
    193 		newtFormSetTimer(self->b.form, refresh);
    194 
    195 	while (1) {
    196 		key = ui_browser__run(&self->b);
    197 
    198 		if (refresh != 0) {
    199 			annotate_browser__calc_percent(self, evidx);
    200 			/*
    201 			 * Current line focus got out of the list of most active
    202 			 * lines, NULL it so that if TAB|UNTAB is pressed, we
    203 			 * move to curr_hot (current hottest line).
    204 			 */
    205 			if (nd != NULL && RB_EMPTY_NODE(nd))
    206 				nd = NULL;
    207 		}
    208 
    209 		switch (key) {
    210 		case -1:
    211 			/*
    212  			 * FIXME we need to check if it was
    213  			 * es.reason == NEWT_EXIT_TIMER
    214  			 */
    215 			if (refresh != 0)
    216 				symbol__annotate_decay_histogram(sym, evidx);
    217 			continue;
    218 		case NEWT_KEY_TAB:
    219 			if (nd != NULL) {
    220 				nd = rb_prev(nd);
    221 				if (nd == NULL)
    222 					nd = rb_last(&self->entries);
    223 			} else
    224 				nd = self->curr_hot;
    225 			break;
    226 		case NEWT_KEY_UNTAB:
    227 			if (nd != NULL)
    228 				nd = rb_next(nd);
    229 				if (nd == NULL)
    230 					nd = rb_first(&self->entries);
    231 			else
    232 				nd = self->curr_hot;
    233 			break;
    234 		case 'H':
    235 			nd = self->curr_hot;
    236 			break;
    237 		default:
    238 			goto out;
    239 		}
    240 
    241 		if (nd != NULL)
    242 			annotate_browser__set_top(self, nd);
    243 	}
    244 out:
    245 	ui_browser__hide(&self->b);
    246 	return key;
    247 }
    248 
    249 int hist_entry__tui_annotate(struct hist_entry *he, int evidx)
    250 {
    251 	return symbol__tui_annotate(he->ms.sym, he->ms.map, evidx, 0);
    252 }
    253 
    254 int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
    255 			 int refresh)
    256 {
    257 	struct objdump_line *pos, *n;
    258 	struct annotation *notes;
    259 	struct annotate_browser browser = {
    260 		.b = {
    261 			.refresh = ui_browser__list_head_refresh,
    262 			.seek	 = ui_browser__list_head_seek,
    263 			.write	 = annotate_browser__write,
    264 			.priv	 = sym,
    265 		},
    266 	};
    267 	int ret;
    268 
    269 	if (sym == NULL)
    270 		return -1;
    271 
    272 	if (map->dso->annotate_warned)
    273 		return -1;
    274 
    275 	if (symbol__annotate(sym, map, sizeof(struct objdump_line_rb_node)) < 0) {
    276 		ui__error_window(ui_helpline__last_msg);
    277 		return -1;
    278 	}
    279 
    280 	ui_helpline__push("Press <- or ESC to exit");
    281 
    282 	notes = symbol__annotation(sym);
    283 
    284 	list_for_each_entry(pos, &notes->src->source, node) {
    285 		struct objdump_line_rb_node *rbpos;
    286 		size_t line_len = strlen(pos->line);
    287 
    288 		if (browser.b.width < line_len)
    289 			browser.b.width = line_len;
    290 		rbpos = objdump_line__rb(pos);
    291 		rbpos->idx = browser.b.nr_entries++;
    292 	}
    293 
    294 	browser.b.entries = &notes->src->source,
    295 	browser.b.width += 18; /* Percentage */
    296 	ret = annotate_browser__run(&browser, evidx, refresh);
    297 	list_for_each_entry_safe(pos, n, &notes->src->source, node) {
    298 		list_del(&pos->node);
    299 		objdump_line__free(pos);
    300 	}
    301 	return ret;
    302 }
    303