brintos

brintos / linux-shallow public Read only

0
0
Text · 4.8 KiB · 52dfaca Raw
174 lines · c
1/*2 * builtin-buildid-list.c3 *4 * Builtin buildid-list command: list buildids in perf.data, in the running5 * kernel and in ELF files.6 *7 * Copyright (C) 2009, Red Hat Inc.8 * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>9 */10#include "builtin.h"11#include "util/build-id.h"12#include "util/debug.h"13#include "util/dso.h"14#include "util/map.h"15#include <subcmd/pager.h>16#include <subcmd/parse-options.h>17#include "util/session.h"18#include "util/symbol.h"19#include "util/data.h"20#include "util/util.h"21#include <errno.h>22#include <inttypes.h>23#include <linux/err.h>24 25static int buildid__map_cb(struct map *map, void *arg __maybe_unused)26{27	const struct dso *dso = map__dso(map);28	char bid_buf[SBUILD_ID_SIZE];29	const char *dso_long_name = dso__long_name(dso);30	const char *dso_short_name = dso__short_name(dso);31 32	memset(bid_buf, 0, sizeof(bid_buf));33	if (dso__has_build_id(dso))34		build_id__sprintf(dso__bid_const(dso), bid_buf);35	printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map__start(map), map__end(map));36	if (dso_long_name != NULL)37		printf(" %s", dso_long_name);38	else if (dso_short_name != NULL)39		printf(" %s", dso_short_name);40 41	printf("\n");42 43	return 0;44}45 46static void buildid__show_kernel_maps(void)47{48	struct machine *machine;49 50	machine = machine__new_host();51	machine__for_each_kernel_map(machine, buildid__map_cb, NULL);52	machine__delete(machine);53}54 55static int sysfs__fprintf_build_id(FILE *fp)56{57	char sbuild_id[SBUILD_ID_SIZE];58	int ret;59 60	ret = sysfs__sprintf_build_id("/", sbuild_id);61	if (ret != sizeof(sbuild_id))62		return ret < 0 ? ret : -EINVAL;63 64	return fprintf(fp, "%s\n", sbuild_id);65}66 67static int filename__fprintf_build_id(const char *name, FILE *fp)68{69	char sbuild_id[SBUILD_ID_SIZE];70	int ret;71 72	ret = filename__sprintf_build_id(name, sbuild_id);73	if (ret != sizeof(sbuild_id))74		return ret < 0 ? ret : -EINVAL;75 76	return fprintf(fp, "%s\n", sbuild_id);77}78 79static bool dso__skip_buildid(struct dso *dso, int with_hits)80{81	return with_hits && !dso__hit(dso);82}83 84static int perf_session__list_build_ids(bool force, bool with_hits)85{86	struct perf_session *session;87	struct perf_data data = {88		.path  = input_name,89		.mode  = PERF_DATA_MODE_READ,90		.force = force,91	};92	struct perf_tool build_id__mark_dso_hit_ops;93 94	symbol__elf_init();95	/*96	 * See if this is an ELF file first:97	 */98	if (filename__fprintf_build_id(input_name, stdout) > 0)99		goto out;100 101	perf_tool__init(&build_id__mark_dso_hit_ops, /*ordered_events=*/true);102	build_id__mark_dso_hit_ops.sample	= build_id__mark_dso_hit;103	build_id__mark_dso_hit_ops.mmap		= perf_event__process_mmap;104	build_id__mark_dso_hit_ops.mmap2	= perf_event__process_mmap2;105	build_id__mark_dso_hit_ops.fork		= perf_event__process_fork;106	build_id__mark_dso_hit_ops.exit		= perf_event__exit_del_thread;107	build_id__mark_dso_hit_ops.attr		= perf_event__process_attr;108	build_id__mark_dso_hit_ops.build_id	= perf_event__process_build_id;109 110	session = perf_session__new(&data, &build_id__mark_dso_hit_ops);111	if (IS_ERR(session))112		return PTR_ERR(session);113 114	/*115	 * We take all buildids when the file contains AUX area tracing data116	 * because we do not decode the trace because it would take too long.117	 */118	if (!perf_data__is_pipe(&data) &&119	    perf_header__has_feat(&session->header, HEADER_AUXTRACE))120		with_hits = false;121 122	if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))123		with_hits = true;124 125	if (zstd_init(&(session->zstd_data), 0) < 0)126		pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");127 128	/*129	 * in pipe-mode, the only way to get the buildids is to parse130	 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID131	 */132	if (with_hits || perf_data__is_pipe(&data))133		perf_session__process_events(session);134 135	perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);136	perf_session__delete(session);137out:138	return 0;139}140 141int cmd_buildid_list(int argc, const char **argv)142{143	bool show_kernel = false;144	bool show_kernel_maps = false;145	bool with_hits = false;146	bool force = false;147	const struct option options[] = {148	OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),149	OPT_STRING('i', "input", &input_name, "file", "input file name"),150	OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),151	OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),152	OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps,153	    "Show build id of current kernel + modules"),154	OPT_INCR('v', "verbose", &verbose, "be more verbose"),155	OPT_END()156	};157	const char * const buildid_list_usage[] = {158		"perf buildid-list [<options>]",159		NULL160	};161 162	argc = parse_options(argc, argv, options, buildid_list_usage, 0);163	setup_pager();164 165	if (show_kernel) {166		return !(sysfs__fprintf_build_id(stdout) > 0);167	} else if (show_kernel_maps) {168		buildid__show_kernel_maps();169		return 0;170	}171 172	return perf_session__list_build_ids(force, with_hits);173}174