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(event_t *event, struct perf_session *session) 18 { 19 struct addr_location al; 20 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 21 struct thread *thread = perf_session__findnew(session, event->ip.pid); 22 23 if (thread == NULL) { 24 pr_err("problem processing %d event, skipping it.\n", 25 event->header.type); 26 return -1; 27 } 28 29 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, 30 event->ip.pid, event->ip.ip, &al); 31 32 if (al.map != NULL) 33 al.map->dso->hit = 1; 34 35 return 0; 36 } 37 38 static int event__exit_del_thread(event_t *self, struct perf_session *session) 39 { 40 struct thread *thread = perf_session__findnew(session, self->fork.tid); 41 42 dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid, 43 self->fork.ppid, self->fork.ptid); 44 45 if (thread) { 46 rb_erase(&thread->rb_node, &session->threads); 47 session->last_match = NULL; 48 thread__delete(thread); 49 } 50 51 return 0; 52 } 53 54 struct perf_event_ops build_id__mark_dso_hit_ops = { 55 .sample = build_id__mark_dso_hit, 56 .mmap = event__process_mmap, 57 .fork = event__process_task, 58 .exit = event__exit_del_thread, 59 }; 60 61 char *dso__build_id_filename(struct dso *self, char *bf, size_t size) 62 { 63 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 64 65 if (!self->has_build_id) 66 return NULL; 67 68 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); 69 if (bf == NULL) { 70 if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, 71 build_id_hex, build_id_hex + 2) < 0) 72 return NULL; 73 } else 74 snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, 75 build_id_hex, build_id_hex + 2); 76 return bf; 77 } 78