aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/util/ui/browsers/annotate.c
blob: 82b78f99251bb2b764165cf8066a85f1e6e4b97d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
#include "../browser.h"
#include "../helpline.h"
#include "../libslang.h"
#include "../../hist.h"
#include "../../sort.h"
#include "../../symbol.h"

static void ui__error_window(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	newtWinMessagev((char *)"Error", (char *)"Ok", (char *)fmt, ap);
	va_end(ap);
}

struct annotate_browser {
	struct ui_browser b;
	struct rb_root	  entries;
	struct rb_node	  *curr_hot;
};

struct objdump_line_rb_node {
	struct rb_node	rb_node;
	double		percent;
	u32		idx;
};

static inline
struct objdump_line_rb_node *objdump_line__rb(struct objdump_line *self)
{
	return (struct objdump_line_rb_node *)(self + 1);
}

static void annotate_browser__write(struct ui_browser *self, void *entry, int row)
{
	struct objdump_line *ol = rb_entry(entry, struct objdump_line, node);
	bool current_entry = ui_browser__is_current_entry(self, row);
	int width = self->width;

	if (ol->offset != -1) {
		struct objdump_line_rb_node *olrb = objdump_line__rb(ol);
		ui_browser__set_percent_color(self, olrb->percent, current_entry);
		slsmg_printf(" %7.2f ", olrb->percent);
		if (!current_entry)
			ui_browser__set_color(self, HE_COLORSET_CODE);
	} else {
		ui_browser__set_percent_color(self, 0, current_entry);
		slsmg_write_nstring(" ", 9);
	}

	SLsmg_write_char(':');
	slsmg_write_nstring(" ", 8);
	if (!*ol->line)
		slsmg_write_nstring(" ", width - 18);
	else
		slsmg_write_nstring(ol->line, width - 18);
}

static double objdump_line__calc_percent(struct objdump_line *self,
					 struct list_head *head,
					 struct symbol *sym)
{
	double percent = 0.0;

	if (self->offset != -1) {
		int len = sym->end - sym->start;
		unsigned int hits = 0;
		struct sym_priv *priv = symbol__priv(sym);
		struct sym_ext *sym_ext = priv->ext;
		struct sym_hist *h = priv->hist;
		s64 offset = self->offset;
		struct objdump_line *next = objdump__get_next_ip_line(head, self);


		while (offset < (s64)len &&
		       (next == NULL || offset < next->offset)) {
			if (sym_ext) {
				percent += sym_ext[offset].percent;
			} else
				hits += h->ip[offset];

			++offset;
		}

		if (sym_ext == NULL && h->sum)
			percent = 100.0 * hits / h->sum;
	}

	return percent;
}

static void objdump__insert_line(struct rb_root *self,
				 struct objdump_line_rb_node *line)
{
	struct rb_node **p = &self->rb_node;
	struct rb_node *parent = NULL;
	struct objdump_line_rb_node *l;

	while (*p != NULL) {
		parent = *p;
		l = rb_entry(parent, struct objdump_line_rb_node, rb_node);
		if (line->percent < l->percent)
			p = &(*p)->rb_left;
		else
			p = &(*p)->rb_right;
	}
	rb_link_node(&line->rb_node, parent, p);
	rb_insert_color(&line->rb_node, self);
}

static void annotate_browser__set_top(struct annotate_browser *self,
				      struct rb_node *nd)
{
	struct objdump_line_rb_node *rbpos;
	struct objdump_line *pos;
	unsigned back;

	ui_browser__refresh_dimensions(&self->b);
	back = self->b.height / 2;
	rbpos = rb_entry(nd, struct objdump_line_rb_node, rb_node);
	pos = ((struct objdump_line *)rbpos) - 1;
	self->b.top_idx = self->b.index = rbpos->idx;

	while (self->b.top_idx != 0 && back != 0) {
		pos = list_entry(pos->node.prev, struct objdump_line, node);

		--self->b.top_idx;
		--back;
	}

	self->b.top = pos;
	self->curr_hot = nd;
}

static int annotate_browser__run(struct annotate_browser *self)
{
	struct rb_node *nd;
	struct hist_entry *he = self->b.priv;
	int key;

	if (ui_browser__show(&self->b, he->ms.sym->name,
			     "<-, -> or ESC: exit, TAB/shift+TAB: cycle thru samples") < 0)
		return -1;
	/*
	 * To allow builtin-annotate to cycle thru multiple symbols by
	 * examining the exit key for this function.
	 */
	ui_browser__add_exit_key(&self->b, NEWT_KEY_RIGHT);

	nd = self->curr_hot;
	if (nd) {
		int tabs[] = { NEWT_KEY_TAB, NEWT_KEY_UNTAB, 0 };
		ui_browser__add_exit_keys(&self->b, tabs);
	}

	while (1) {
		key = ui_browser__run(&self->b);

		switch (key) {
		case NEWT_KEY_TAB:
			nd = rb_prev(nd);
			if (nd == NULL)
				nd = rb_last(&self->entries);
			annotate_browser__set_top(self, nd);
			break;
		case NEWT_KEY_UNTAB:
			nd = rb_next(nd);
			if (nd == NULL)
				nd = rb_first(&self->entries);
			annotate_browser__set_top(self, nd);
			break;
		default:
			goto out;
		}
	}
out:
	ui_browser__hide(&self->b);
	return key;
}

int hist_entry__tui_annotate(struct hist_entry *self)
{
	struct objdump_line *pos, *n;
	struct objdump_line_rb_node *rbpos;
	LIST_HEAD(head);
	struct annotate_browser browser = {
		.b = {
			.entries = &head,
			.refresh = ui_browser__list_head_refresh,
			.seek	 = ui_browser__list_head_seek,
			.write	 = annotate_browser__write,
			.priv	 = self,
		},
	};
	int ret;

	if (self->ms.sym == NULL)
		return -1;

	if (self->ms.map->dso->annotate_warned)
		return -1;

	if (hist_entry__annotate(self, &head, sizeof(*rbpos)) < 0) {
		ui__error_window(ui_helpline__last_msg);
		return -1;
	}

	ui_helpline__push("Press <- or ESC to exit");

	list_for_each_entry(pos, &head, node) {
		size_t line_len = strlen(pos->line);
		if (browser.b.width < line_len)
			browser.b.width = line_len;
		rbpos = objdump_line__rb(pos);
		rbpos->idx = browser.b.nr_entries++;
		rbpos->percent = objdump_line__calc_percent(pos, &head, self->ms.sym);
		if (rbpos->percent < 0.01)
			continue;
		objdump__insert_line(&browser.entries, rbpos);
	}

	/*
	 * Position the browser at the hottest line.
	 */
	browser.curr_hot = rb_last(&browser.entries);
	if (browser.curr_hot)
		annotate_browser__set_top(&browser, browser.curr_hot);

	browser.b.width += 18; /* Percentage */
	ret = annotate_browser__run(&browser);
	list_for_each_entry_safe(pos, n, &head, node) {
		list_del(&pos->node);
		objdump_line__free(pos);
	}
	return ret;
}