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 16 static int build_id__mark_dso_hit(event_t *event, struct perf_session *session) 17 { 18 struct addr_location al; 19 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 20 struct thread *thread = perf_session__findnew(session, event->ip.pid); 21 22 if (thread == NULL) { 23 pr_err("problem processing %d event, skipping it.\n", 24 event->header.type); 25 return -1; 26 } 27 28 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION, 29 event->ip.pid, event->ip.ip, &al); 30 31 if (al.map != NULL) 32 al.map->dso->hit = 1; 33 34 return 0; 35 } 36 37 struct perf_event_ops build_id__mark_dso_hit_ops = { 38 .sample = build_id__mark_dso_hit, 39 .mmap = event__process_mmap, 40 .fork = event__process_task, 41 }; 42 43 char *dso__build_id_filename(struct dso *self, char *bf, size_t size) 44 { 45 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 46 const char *home; 47 48 if (!self->has_build_id) 49 return NULL; 50 51 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); 52 home = getenv("HOME"); 53 if (bf == NULL) { 54 if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home, 55 DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0) 56 return NULL; 57 } else 58 snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home, 59 DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2); 60 return bf; 61 } 62