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 30 memset(bid_buf, 0, sizeof(bid_buf)); 31 if (dso->has_build_id) 32 build_id__sprintf(&dso->bid, bid_buf); 33 printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map__start(map), map__end(map)); 34 if (dso->long_name != NULL) { 35 printf(" %s", dso->long_name); 36 } else if (dso->short_name != NULL) { 37 printf(" %s", dso->short_name); 38 } 39 printf("\n"); 40 41 return 0; 42 } 43 44 static void buildid__show_kernel_maps(void) 45 { 46 struct machine *machine; 47 48 machine = machine__new_host(); 49 machine__for_each_kernel_map(machine, buildid__map_cb, NULL); 50 machine__delete(machine); 51 } 52 53 static int sysfs__fprintf_build_id(FILE *fp) 54 { 55 char sbuild_id[SBUILD_ID_SIZE]; 56 int ret; 57 58 ret = sysfs__sprintf_build_id("/", sbuild_id); 59 if (ret != sizeof(sbuild_id)) 60 return ret < 0 ? ret : -EINVAL; 61 62 return fprintf(fp, "%s\n", sbuild_id); 63 } 64 65 static int filename__fprintf_build_id(const char *name, FILE *fp) 66 { 67 char sbuild_id[SBUILD_ID_SIZE]; 68 int ret; 69 70 ret = filename__sprintf_build_id(name, sbuild_id); 71 if (ret != sizeof(sbuild_id)) 72 return ret < 0 ? ret : -EINVAL; 73 74 return fprintf(fp, "%s\n", sbuild_id); 75 } 76 77 static bool dso__skip_buildid(struct dso *dso, int with_hits) 78 { 79 return with_hits && !dso->hit; 80 } 81 82 static int perf_session__list_build_ids(bool force, bool with_hits) 83 { 84 struct perf_session *session; 85 struct perf_data data = { 86 .path = input_name, 87 .mode = PERF_DATA_MODE_READ, 88 .force = force, 89 }; 90 91 symbol__elf_init(); 92 /* 93 * See if this is an ELF file first: 94 */ 95 if (filename__fprintf_build_id(input_name, stdout) > 0) 96 goto out; 97 98 session = perf_session__new(&data, &build_id__mark_dso_hit_ops); 99 if (IS_ERR(session)) 100 return PTR_ERR(session); 101 102 /* 103 * We take all buildids when the file contains AUX area tracing data 104 * because we do not decode the trace because it would take too long. 105 */ 106 if (!perf_data__is_pipe(&data) && 107 perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 108 with_hits = false; 109 110 if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID)) 111 with_hits = true; 112 113 if (zstd_init(&(session->zstd_data), 0) < 0) 114 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n"); 115 116 /* 117 * in pipe-mode, the only way to get the buildids is to parse 118 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID 119 */ 120 if (with_hits || perf_data__is_pipe(&data)) 121 perf_session__process_events(session); 122 123 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits); 124 perf_session__delete(session); 125 out: 126 return 0; 127 } 128 129 int cmd_buildid_list(int argc, const char **argv) 130 { 131 bool show_kernel = false; 132 bool show_kernel_maps = false; 133 bool with_hits = false; 134 bool force = false; 135 const struct option options[] = { 136 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"), 137 OPT_STRING('i', "input", &input_name, "file", "input file name"), 138 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 139 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"), 140 OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps, 141 "Show build id of current kernel + modules"), 142 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 143 OPT_END() 144 }; 145 const char * const buildid_list_usage[] = { 146 "perf buildid-list [<options>]", 147 NULL 148 }; 149 150 argc = parse_options(argc, argv, options, buildid_list_usage, 0); 151 setup_pager(); 152 153 if (show_kernel) { 154 return !(sysfs__fprintf_build_id(stdout) > 0); 155 } else if (show_kernel_maps) { 156 buildid__show_kernel_maps(); 157 return 0; 158 } 159 160 return perf_session__list_build_ids(force, with_hits); 161 } 162