1 // SPDX-License-Identifier: GPL-2.0
2 /* Display a menu with individual samples to browse with perf script */
3 #include "hist.h"
4 #include "evsel.h"
5 #include "hists.h"
6 #include "sort.h"
7 #include "config.h"
8 #include "time-utils.h"
9 #include "../util.h"
10 #include "../../util/util.h" // perf_exe()
11 #include "../../perf.h"
12 #include <stdlib.h>
13 #include <string.h>
14 #include <linux/time64.h>
15 #include <linux/zalloc.h>
16 
17 static u64 context_len = 10 * NSEC_PER_MSEC;
18 
res_sample_config(const char * var,const char * value,void * data __maybe_unused)19 static int res_sample_config(const char *var, const char *value, void *data __maybe_unused)
20 {
21 	if (!strcmp(var, "samples.context"))
22 		return perf_config_u64(&context_len, var, value);
23 	return 0;
24 }
25 
res_sample_init(void)26 void res_sample_init(void)
27 {
28 	perf_config(res_sample_config, NULL);
29 }
30 
res_sample_browse(struct res_sample * res_samples,int num_res,struct evsel * evsel,enum rstype rstype)31 int res_sample_browse(struct res_sample *res_samples, int num_res,
32 		      struct evsel *evsel, enum rstype rstype)
33 {
34 	char **names;
35 	int i, n;
36 	int choice;
37 	char *cmd;
38 	char pbuf[256], tidbuf[32], cpubuf[32];
39 	const char *perf = perf_exe(pbuf, sizeof pbuf);
40 	char trange[128], tsample[64];
41 	struct res_sample *r;
42 	char extra_format[256];
43 
44 	names = calloc(num_res, sizeof(char *));
45 	if (!names)
46 		return -1;
47 	for (i = 0; i < num_res; i++) {
48 		char tbuf[64];
49 
50 		timestamp__scnprintf_nsec(res_samples[i].time, tbuf, sizeof tbuf);
51 		if (asprintf(&names[i], "%s: CPU %d tid %d", tbuf,
52 			     res_samples[i].cpu, res_samples[i].tid) < 0) {
53 			while (--i >= 0)
54 				zfree(&names[i]);
55 			free(names);
56 			return -1;
57 		}
58 	}
59 	choice = ui__popup_menu(num_res, names, NULL);
60 	for (i = 0; i < num_res; i++)
61 		zfree(&names[i]);
62 	free(names);
63 
64 	if (choice < 0 || choice >= num_res)
65 		return -1;
66 	r = &res_samples[choice];
67 
68 	n = timestamp__scnprintf_nsec(r->time - context_len, trange, sizeof trange);
69 	trange[n++] = ',';
70 	timestamp__scnprintf_nsec(r->time + context_len, trange + n, sizeof trange - n);
71 
72 	timestamp__scnprintf_nsec(r->time, tsample, sizeof tsample);
73 
74 	attr_to_script(extra_format, &evsel->core.attr);
75 
76 	if (asprintf(&cmd, "%s script %s%s --time %s %s%s %s%s --ns %s %s %s %s %s | less +/%s",
77 		     perf,
78 		     input_name ? "-i " : "",
79 		     input_name ? input_name : "",
80 		     trange,
81 		     r->cpu >= 0 ? "--cpu " : "",
82 		     r->cpu >= 0 ? (sprintf(cpubuf, "%d", r->cpu), cpubuf) : "",
83 		     r->tid ? "--tid " : "",
84 		     r->tid ? (sprintf(tidbuf, "%d", r->tid), tidbuf) : "",
85 		     extra_format,
86 		     rstype == A_ASM ? "-F +insn --xed" :
87 		     rstype == A_SOURCE ? "-F +srcline,+srccode" : "",
88 		     symbol_conf.inline_name ? "--inline" : "",
89 		     "--show-lost-events ",
90 		     r->tid ? "--show-switch-events --show-task-events " : "",
91 		     tsample) < 0)
92 		return -1;
93 	run_script(cmd);
94 	free(cmd);
95 	return 0;
96 }
97