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_session *session) 20 { 21 struct addr_location al; 22 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 23 struct thread *thread = perf_session__findnew(session, event->ip.pid); 24 25 if (thread == NULL) { 26 pr_err("problem processing %d event, skipping it.\n", 27 event->header.type); 28 return -1; 29 } 30 31 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, 32 event->ip.pid, event->ip.ip, &al); 33 34 if (al.map != NULL) 35 al.map->dso->hit = 1; 36 37 return 0; 38 } 39 40 static int perf_event__exit_del_thread(union perf_event *event, 41 struct perf_sample *sample __used, 42 struct perf_session *session) 43 { 44 struct thread *thread = perf_session__findnew(session, event->fork.tid); 45 46 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, 47 event->fork.ppid, event->fork.ptid); 48 49 if (thread) { 50 rb_erase(&thread->rb_node, &session->threads); 51 session->last_match = NULL; 52 thread__delete(thread); 53 } 54 55 return 0; 56 } 57 58 struct perf_event_ops build_id__mark_dso_hit_ops = { 59 .sample = build_id__mark_dso_hit, 60 .mmap = perf_event__process_mmap, 61 .fork = perf_event__process_task, 62 .exit = perf_event__exit_del_thread, 63 }; 64 65 char *dso__build_id_filename(struct dso *self, char *bf, size_t size) 66 { 67 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 68 69 if (!self->has_build_id) 70 return NULL; 71 72 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); 73 if (bf == NULL) { 74 if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, 75 build_id_hex, build_id_hex + 2) < 0) 76 return NULL; 77 } else 78 snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, 79 build_id_hex, build_id_hex + 2); 80 return bf; 81 } 82