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 (at) redhat.com> 9 */ 10 #include "builtin.h" 11 #include "perf.h" 12 #include "util/build-id.h" 13 #include "util/cache.h" 14 #include "util/debug.h" 15 #include "util/parse-options.h" 16 #include "util/session.h" 17 #include "util/symbol.h" 18 19 static int sysfs__fprintf_build_id(FILE *fp) 20 { 21 u8 kallsyms_build_id[BUILD_ID_SIZE]; 22 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 23 24 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, 25 sizeof(kallsyms_build_id)) != 0) 26 return -1; 27 28 build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id), 29 sbuild_id); 30 fprintf(fp, "%s\n", sbuild_id); 31 return 0; 32 } 33 34 static int filename__fprintf_build_id(const char *name, FILE *fp) 35 { 36 u8 build_id[BUILD_ID_SIZE]; 37 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 38 39 if (filename__read_build_id(name, build_id, 40 sizeof(build_id)) != sizeof(build_id)) 41 return 0; 42 43 build_id__sprintf(build_id, sizeof(build_id), sbuild_id); 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 56 symbol__elf_init(); 57 /* 58 * See if this is an ELF file first: 59 */ 60 if (filename__fprintf_build_id(input_name, stdout)) 61 goto out; 62 63 session = perf_session__new(input_name, O_RDONLY, force, false, 64 &build_id__mark_dso_hit_ops); 65 if (session == NULL) 66 return -1; 67 /* 68 * in pipe-mode, the only way to get the buildids is to parse 69 * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID 70 */ 71 if (with_hits || session->fd_pipe) 72 perf_session__process_events(session, &build_id__mark_dso_hit_ops); 73 74 perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits); 75 perf_session__delete(session); 76 out: 77 return 0; 78 } 79 80 int cmd_buildid_list(int argc, const char **argv, 81 const char *prefix __maybe_unused) 82 { 83 bool show_kernel = false; 84 bool with_hits = false; 85 bool force = false; 86 const struct option options[] = { 87 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"), 88 OPT_STRING('i', "input", &input_name, "file", "input file name"), 89 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 90 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"), 91 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 92 OPT_END() 93 }; 94 const char * const buildid_list_usage[] = { 95 "perf buildid-list [<options>]", 96 NULL 97 }; 98 99 argc = parse_options(argc, argv, options, buildid_list_usage, 0); 100 setup_pager(); 101 102 if (show_kernel) 103 return sysfs__fprintf_build_id(stdout); 104 105 return perf_session__list_build_ids(force, with_hits); 106 } 107