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
|
#include <elf.h>
#include <inttypes.h>
#include <sys/ttydefaults.h>
#include <string.h>
#include "../../util/sort.h"
#include "../../util/util.h"
#include "../../util/hist.h"
#include "../../util/debug.h"
#include "../../util/symbol.h"
#include "../browser.h"
#include "../helpline.h"
#include "../libslang.h"
/* 2048 lines should be enough for a script output */
#define MAX_LINES 2048
/* 160 bytes for one output line */
#define AVERAGE_LINE_LEN 160
struct script_line {
struct list_head node;
char line[AVERAGE_LINE_LEN];
};
struct perf_script_browser {
struct ui_browser b;
struct list_head entries;
const char *script_name;
int nr_lines;
};
#define SCRIPT_NAMELEN 128
#define SCRIPT_MAX_NO 64
/*
* Usually the full path for a script is:
* /home/username/libexec/perf-core/scripts/python/xxx.py
* /home/username/libexec/perf-core/scripts/perl/xxx.pl
* So 256 should be long enough to contain the full path.
*/
#define SCRIPT_FULLPATH_LEN 256
/*
* When success, will copy the full path of the selected script
* into the buffer pointed by script_name, and return 0.
* Return -1 on failure.
*/
static int list_scripts(char *script_name)
{
char *buf, *names[SCRIPT_MAX_NO], *paths[SCRIPT_MAX_NO];
int i, num, choice, ret = -1;
/* Preset the script name to SCRIPT_NAMELEN */
buf = malloc(SCRIPT_MAX_NO * (SCRIPT_NAMELEN + SCRIPT_FULLPATH_LEN));
if (!buf)
return ret;
for (i = 0; i < SCRIPT_MAX_NO; i++) {
names[i] = buf + i * (SCRIPT_NAMELEN + SCRIPT_FULLPATH_LEN);
paths[i] = names[i] + SCRIPT_NAMELEN;
}
num = find_scripts(names, paths);
if (num > 0) {
choice = ui__popup_menu(num, names);
if (choice < num && choice >= 0) {
strcpy(script_name, paths[choice]);
ret = 0;
}
}
free(buf);
return ret;
}
static void script_browser__write(struct ui_browser *browser,
void *entry, int row)
{
struct script_line *sline = list_entry(entry, struct script_line, node);
bool current_entry = ui_browser__is_current_entry(browser, row);
ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
HE_COLORSET_NORMAL);
slsmg_write_nstring(sline->line, browser->width);
}
static int script_browser__run(struct perf_script_browser *browser)
{
int key;
if (ui_browser__show(&browser->b, browser->script_name,
"Press <- or ESC to exit") < 0)
return -1;
while (1) {
key = ui_browser__run(&browser->b, 0);
/* We can add some special key handling here if needed */
break;
}
ui_browser__hide(&browser->b);
return key;
}
int script_browse(const char *script_opt)
{
char cmd[SCRIPT_FULLPATH_LEN*2], script_name[SCRIPT_FULLPATH_LEN];
char *line = NULL;
size_t len = 0;
ssize_t retlen;
int ret = -1, nr_entries = 0;
FILE *fp;
void *buf;
struct script_line *sline;
struct perf_script_browser script = {
.b = {
.refresh = ui_browser__list_head_refresh,
.seek = ui_browser__list_head_seek,
.write = script_browser__write,
},
.script_name = script_name,
};
INIT_LIST_HEAD(&script.entries);
/* Save each line of the output in one struct script_line object. */
buf = zalloc((sizeof(*sline)) * MAX_LINES);
if (!buf)
return -1;
sline = buf;
memset(script_name, 0, SCRIPT_FULLPATH_LEN);
if (list_scripts(script_name))
goto exit;
sprintf(cmd, "perf script -s %s ", script_name);
if (script_opt)
strcat(cmd, script_opt);
if (input_name) {
strcat(cmd, " -i ");
strcat(cmd, input_name);
}
strcat(cmd, " 2>&1");
fp = popen(cmd, "r");
if (!fp)
goto exit;
while ((retlen = getline(&line, &len, fp)) != -1) {
strncpy(sline->line, line, AVERAGE_LINE_LEN);
/* If one output line is very large, just cut it short */
if (retlen >= AVERAGE_LINE_LEN) {
sline->line[AVERAGE_LINE_LEN - 1] = '\0';
sline->line[AVERAGE_LINE_LEN - 2] = '\n';
}
list_add_tail(&sline->node, &script.entries);
if (script.b.width < retlen)
script.b.width = retlen;
if (nr_entries++ >= MAX_LINES - 1)
break;
sline++;
}
if (script.b.width > AVERAGE_LINE_LEN)
script.b.width = AVERAGE_LINE_LEN;
if (line)
free(line);
pclose(fp);
script.nr_lines = nr_entries;
script.b.nr_entries = nr_entries;
script.b.entries = &script.entries;
ret = script_browser__run(&script);
exit:
free(buf);
return ret;
}
|
