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 "perf.h" 12 #include "util/build-id.h" 13 #include "util/debug.h" 14 #include "util/dso.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 <errno.h> 21 #include <linux/err.h> 22 23 static int sysfs__fprintf_build_id(FILE *fp) 24 { 25 char sbuild_id[SBUILD_ID_SIZE]; 26 int ret; 27 28 ret = sysfs__sprintf_build_id("/", sbuild_id); 29 if (ret != sizeof(sbuild_id)) 30 return ret < 0 ? ret : -EINVAL; 31 32 return fprintf(fp, "%s\n", sbuild_id); 33 } 34 35 static int filename__fprintf_build_id(const char *name, FILE *fp) 36 { 37 char sbuild_id[SBUILD_ID_SIZE]; 38 int ret; 39 40 ret = filename__sprintf_build_id(name, sbuild_id); 41 if (ret != sizeof(sbuild_id)) 42 return ret < 0 ? ret : -EINVAL; 43 44 return fprintf(fp, "%s\n", sbuild_id); 45 } 46 47 static bool dso__skip_buildid(struct dso *dso, int with_hits) 48 { 49 return with_hits && !dso->hit; 50 } 51 52 static int perf_session__list_build_ids(bool force, bool with_hits) 53 { 54 struct perf_session *session; 55 struct perf_data data = { 56 .path = input_name, 57 .mode = PERF_DATA_MODE_READ, 58 .force = force, 59 }; 60 61 symbol__elf_init(); 62 /* 63 * See if this is an ELF file first: 64 */ 65 if (filename__fprintf_build_id(input_name, stdout) > 0) 66 goto out; 67 68 session = perf_session__new(&data, false, &build_id__mark_dso_hit_ops); 69 if (IS_ERR(session)) 70 return PTR_ERR(session); 71 72 /* 73 * We take all buildids when the file contains AUX area tracing data 74 * because we do not decode the trace because it would take too long. 75 */ 76 if (!perf_data__is_pipe(&data) && 77 perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 78 with_hits = false; 79 80 if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID)) 81 with_hits = true; 82 83 if (zstd_init(&(session->zstd_data), 0) < 0) 84 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n"); 85 86 /* 87 * in pipe-mode, the only way to get the buildids is to parse 88 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID 89 */ 90 if (with_hits || perf_data__is_pipe(&data)) 91 perf_session__process_events(session); 92 93 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits); 94 perf_session__delete(session); 95 out: 96 return 0; 97 } 98 99 int cmd_buildid_list(int argc, const char **argv) 100 { 101 bool show_kernel = false; 102 bool with_hits = false; 103 bool force = false; 104 const struct option options[] = { 105 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"), 106 OPT_STRING('i', "input", &input_name, "file", "input file name"), 107 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 108 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"), 109 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 110 OPT_END() 111 }; 112 const char * const buildid_list_usage[] = { 113 "perf buildid-list [<options>]", 114 NULL 115 }; 116 117 argc = parse_options(argc, argv, options, buildid_list_usage, 0); 118 setup_pager(); 119 120 if (show_kernel) 121 return !(sysfs__fprintf_build_id(stdout) > 0); 122 123 return perf_session__list_build_ids(force, with_hits); 124 } 125