cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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res_sample.c (2652B)

      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
     17static u64 context_len = 10 * NSEC_PER_MSEC;
     18
     19static 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
     26void res_sample_init(void)
     27{
     28	perf_config(res_sample_config, NULL);
     29}
     30
     31int 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}