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/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 #include <libelf.h> 20 21 static char const *input_name = "perf.data"; 22 static bool force; 23 static bool show_kernel; 24 static bool with_hits; 25 26 static const char * const buildid_list_usage[] = { 27 "perf buildid-list [<options>]", 28 NULL 29 }; 30 31 static const struct option options[] = { 32 OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"), 33 OPT_STRING('i', "input", &input_name, "file", 34 "input file name"), 35 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), 36 OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"), 37 OPT_INCR('v', "verbose", &verbose, 38 "be more verbose"), 39 OPT_END() 40 }; 41 42 static int perf_session__list_build_ids(void) 43 { 44 struct perf_session *session; 45 46 session = perf_session__new(input_name, O_RDONLY, force, false, 47 &build_id__mark_dso_hit_ops); 48 if (session == NULL) 49 return -1; 50 51 if (with_hits) 52 perf_session__process_events(session, &build_id__mark_dso_hit_ops); 53 54 perf_session__fprintf_dsos_buildid(session, stdout, with_hits); 55 56 perf_session__delete(session); 57 return 0; 58 } 59 60 static int sysfs__fprintf_build_id(FILE *fp) 61 { 62 u8 kallsyms_build_id[BUILD_ID_SIZE]; 63 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 64 65 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id, 66 sizeof(kallsyms_build_id)) != 0) 67 return -1; 68 69 build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id), 70 sbuild_id); 71 fprintf(fp, "%s\n", sbuild_id); 72 return 0; 73 } 74 75 static int filename__fprintf_build_id(const char *name, FILE *fp) 76 { 77 u8 build_id[BUILD_ID_SIZE]; 78 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 79 80 if (filename__read_build_id(name, build_id, 81 sizeof(build_id)) != sizeof(build_id)) 82 return 0; 83 84 build_id__sprintf(build_id, sizeof(build_id), sbuild_id); 85 return fprintf(fp, "%s\n", sbuild_id); 86 } 87 88 static int __cmd_buildid_list(void) 89 { 90 if (show_kernel) 91 return sysfs__fprintf_build_id(stdout); 92 93 elf_version(EV_CURRENT); 94 /* 95 * See if this is an ELF file first: 96 */ 97 if (filename__fprintf_build_id(input_name, stdout)) 98 return 0; 99 100 return perf_session__list_build_ids(); 101 } 102 103 int cmd_buildid_list(int argc, const char **argv, const char *prefix __used) 104 { 105 argc = parse_options(argc, argv, options, buildid_list_usage, 0); 106 setup_pager(); 107 return __cmd_buildid_list(); 108 } 109