1 /* 2 * build-id.c 3 * 4 * build-id support 5 * 6 * Copyright (C) 2009, 2010 Red Hat Inc. 7 * Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com> 8 */ 9 #include "util.h" 10 #include <stdio.h> 11 #include "build-id.h" 12 #include "event.h" 13 #include "symbol.h" 14 #include <linux/kernel.h> 15 #include "debug.h" 16 17 static int build_id__mark_dso_hit(union perf_event *event, 18 struct perf_sample *sample __used, 19 struct perf_evsel *evsel __used, 20 struct perf_session *session) 21 { 22 struct addr_location al; 23 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 24 struct thread *thread = perf_session__findnew(session, event->ip.pid); 25 26 if (thread == NULL) { 27 pr_err("problem processing %d event, skipping it.\n", 28 event->header.type); 29 return -1; 30 } 31 32 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, 33 event->ip.pid, event->ip.ip, &al); 34 35 if (al.map != NULL) 36 al.map->dso->hit = 1; 37 38 return 0; 39 } 40 41 static int perf_event__exit_del_thread(union perf_event *event, 42 struct perf_sample *sample __used, 43 struct perf_session *session) 44 { 45 struct thread *thread = perf_session__findnew(session, event->fork.tid); 46 47 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, 48 event->fork.ppid, event->fork.ptid); 49 50 if (thread) { 51 rb_erase(&thread->rb_node, &session->threads); 52 session->last_match = NULL; 53 thread__delete(thread); 54 } 55 56 return 0; 57 } 58 59 struct perf_event_ops build_id__mark_dso_hit_ops = { 60 .sample = build_id__mark_dso_hit, 61 .mmap = perf_event__process_mmap, 62 .fork = perf_event__process_task, 63 .exit = perf_event__exit_del_thread, 64 }; 65 66 char *dso__build_id_filename(struct dso *self, char *bf, size_t size) 67 { 68 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 69 70 if (!self->has_build_id) 71 return NULL; 72 73 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); 74 if (bf == NULL) { 75 if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, 76 build_id_hex, build_id_hex + 2) < 0) 77 return NULL; 78 } else 79 snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, 80 build_id_hex, build_id_hex + 2); 81 return bf; 82 } 83