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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builtin-evlist.c (2604B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Builtin evlist command: Show the list of event selectors present
      4 * in a perf.data file.
      5 */
      6#include "builtin.h"
      7
      8#include <linux/list.h>
      9
     10#include "perf.h"
     11#include "util/evlist.h"
     12#include "util/evsel.h"
     13#include "util/evsel_fprintf.h"
     14#include "util/parse-events.h"
     15#include <subcmd/parse-options.h>
     16#include "util/session.h"
     17#include "util/data.h"
     18#include "util/debug.h"
     19#include <linux/err.h>
     20#include "util/tool.h"
     21
     22static int process_header_feature(struct perf_session *session __maybe_unused,
     23				  union perf_event *event __maybe_unused)
     24{
     25	session_done = 1;
     26	return 0;
     27}
     28
     29static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
     30{
     31	struct perf_session *session;
     32	struct evsel *pos;
     33	struct perf_data data = {
     34		.path      = file_name,
     35		.mode      = PERF_DATA_MODE_READ,
     36		.force     = details->force,
     37	};
     38	struct perf_tool tool = {
     39		/* only needed for pipe mode */
     40		.attr = perf_event__process_attr,
     41		.feature = process_header_feature,
     42	};
     43	bool has_tracepoint = false;
     44
     45	session = perf_session__new(&data, &tool);
     46	if (IS_ERR(session))
     47		return PTR_ERR(session);
     48
     49	if (data.is_pipe)
     50		perf_session__process_events(session);
     51
     52	evlist__for_each_entry(session->evlist, pos) {
     53		evsel__fprintf(pos, details, stdout);
     54
     55		if (pos->core.attr.type == PERF_TYPE_TRACEPOINT)
     56			has_tracepoint = true;
     57	}
     58
     59	if (has_tracepoint && !details->trace_fields)
     60		printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
     61
     62	perf_session__delete(session);
     63	return 0;
     64}
     65
     66int cmd_evlist(int argc, const char **argv)
     67{
     68	struct perf_attr_details details = { .verbose = false, };
     69	const struct option options[] = {
     70	OPT_STRING('i', "input", &input_name, "file", "Input file name"),
     71	OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
     72	OPT_BOOLEAN('v', "verbose", &details.verbose,
     73		    "Show all event attr details"),
     74	OPT_BOOLEAN('g', "group", &details.event_group,
     75		    "Show event group information"),
     76	OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
     77	OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
     78	OPT_END()
     79	};
     80	const char * const evlist_usage[] = {
     81		"perf evlist [<options>]",
     82		NULL
     83	};
     84
     85	argc = parse_options(argc, argv, options, evlist_usage, 0);
     86	if (argc)
     87		usage_with_options(evlist_usage, options);
     88
     89	if (details.event_group && (details.verbose || details.freq)) {
     90		usage_with_options_msg(evlist_usage, options,
     91			"--group option is not compatible with other options\n");
     92	}
     93
     94	return __cmd_evlist(input_name, &details);
     95}