1 /* 2 * builtin-buildid-list.c 3 * 4 * Builtin buildid-list command: list buildids in perf.data, in the running 5 * 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 25 static 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 46 static 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 55 static 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 67 static 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 79 static bool dso__skip_buildid(struct dso *dso, int with_hits) 80 { 81 return with_hits && !dso__hit(dso); 82 } 83 84 static 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 data 116 * 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 parse 130 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID 131 */ 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); 137 out: 138 return 0; 139 } 140 141 int 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 NULL 160 }; 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