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__snprintf(dso__bid(dso), bid_buf, sizeof(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 perf_env host_env; 49 struct machine *machine; 50 51 perf_env__init(&host_env); 52 machine = machine__new_host(&host_env); 53 machine__for_each_kernel_map(machine, buildid__map_cb, NULL); 54 machine__delete(machine); 55 perf_env__exit(&host_env); 56 } 57 58 static int sysfs__fprintf_build_id(FILE *fp) 59 { 60 char sbuild_id[SBUILD_ID_SIZE]; 61 int ret; 62 63 ret = sysfs__snprintf_build_id("/", sbuild_id, sizeof(sbuild_id)); 64 if (ret != sizeof(sbuild_id)) 65 return ret < 0 ? ret : -EINVAL; 66 67 return fprintf(fp, "%s\n", sbuild_id); 68 } 69 70 static int filename__fprintf_build_id(const char *name, FILE *fp) 71 { 72 char sbuild_id[SBUILD_ID_SIZE]; 73 int ret; 74 75 ret = filename__snprintf_build_id(name, sbuild_id, sizeof(sbuild_id)); 76 if (ret != sizeof(sbuild_id)) 77 return ret < 0 ? ret : -EINVAL; 78 79 return fprintf(fp, "%s\n", sbuild_id); 80 } 81 82 static bool dso__skip_buildid(struct dso *dso, int with_hits) 83 { 84 return with_hits && !dso__hit(dso); 85 } 86 87 static int perf_session__list_build_ids(bool force, bool with_hits) 88 { 89 struct perf_session *session; 90 struct perf_data data = { 91 .path = input_name, 92 .mode = PERF_DATA_MODE_READ, 93 .force = force, 94 }; 95 struct perf_tool build_id__mark_dso_hit_ops; 96 97 symbol__elf_init(); 98 /* 99 * See if this is an ELF file first: 100 */ 101 if (filename__fprintf_build_id(input_name, stdout) > 0) 102 goto out; 103 104 perf_tool__init(&build_id__mark_dso_hit_ops, /*ordered_events=*/true); 105 build_id__mark_dso_hit_ops.sample = build_id__mark_dso_hit; 106 build_id__mark_dso_hit_ops.mmap = perf_event__process_mmap; 107 build_id__mark_dso_hit_ops.mmap2 = perf_event__process_mmap2; 108 build_id__mark_dso_hit_ops.fork = perf_event__process_fork; 109 build_id__mark_dso_hit_ops.exit = perf_event__exit_del_thread; 110 build_id__mark_dso_hit_ops.attr = perf_event__process_attr; 111 build_id__mark_dso_hit_ops.build_id = perf_event__process_build_id; 112 113 session = perf_session__new(&data, &build_id__mark_dso_hit_ops); 114 if (IS_ERR(session)) 115 return PTR_ERR(session); 116 117 /* 118 * We take all buildids when the file contains AUX area tracing data 119 * because we do not decode the trace because it would take too long. 120 */ 121 if (!perf_data__is_pipe(&data) && 122 perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 123 with_hits = false; 124 125 if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID)) 126 with_hits = true; 127 128 if (zstd_init(&(session->zstd_data), 0) < 0) 129 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n"); 130 131 /* 132 * in pipe-mode, the only way to get the buildids is to parse 133 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID 134 */ 135 if (with_hits || perf_data__is_pipe(&data)) 136 perf_session__process_events(session); 137 138 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits); 139 perf_session__delete(session); 140 out: 141 return 0; 142 } 143 144 int cmd_buildid_list(int argc, const char **argv) 145 { 146 bool show_kernel = false; 147 bool show_kernel_maps = false; 148 bool with_hits = false; 149 bool force = false; 150 const struct option options[] = { 151 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"), 152 OPT_STRING('i', "input", &input_name, "file", "input file name"), 153 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 154 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"), 155 OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps, 156 "Show build id of current kernel + modules"), 157 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 158 OPT_END() 159 }; 160 const char * const buildid_list_usage[] = { 161 "perf buildid-list [<options>]", 162 NULL 163 }; 164 165 argc = parse_options(argc, argv, options, buildid_list_usage, 0); 166 setup_pager(); 167 168 if (show_kernel) { 169 return !(sysfs__fprintf_build_id(stdout) > 0); 170 } else if (show_kernel_maps) { 171 buildid__show_kernel_maps(); 172 return 0; 173 } 174 175 return perf_session__list_build_ids(force, with_hits); 176 } 177