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 #include "session.h" 17 #include "tool.h" 18 19 int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused, 20 union perf_event *event, 21 struct perf_sample *sample __maybe_unused, 22 struct perf_evsel *evsel __maybe_unused, 23 struct machine *machine) 24 { 25 struct addr_location al; 26 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 27 struct thread *thread = machine__findnew_thread(machine, event->ip.pid); 28 29 if (thread == NULL) { 30 pr_err("problem processing %d event, skipping it.\n", 31 event->header.type); 32 return -1; 33 } 34 35 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION, 36 event->ip.ip, &al); 37 38 if (al.map != NULL) 39 al.map->dso->hit = 1; 40 41 return 0; 42 } 43 44 static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused, 45 union perf_event *event, 46 struct perf_sample *sample 47 __maybe_unused, 48 struct machine *machine) 49 { 50 struct thread *thread = machine__findnew_thread(machine, event->fork.tid); 51 52 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, 53 event->fork.ppid, event->fork.ptid); 54 55 if (thread) { 56 rb_erase(&thread->rb_node, &machine->threads); 57 machine->last_match = NULL; 58 thread__delete(thread); 59 } 60 61 return 0; 62 } 63 64 struct perf_tool build_id__mark_dso_hit_ops = { 65 .sample = build_id__mark_dso_hit, 66 .mmap = perf_event__process_mmap, 67 .fork = perf_event__process_fork, 68 .exit = perf_event__exit_del_thread, 69 .attr = perf_event__process_attr, 70 .build_id = perf_event__process_build_id, 71 }; 72 73 int build_id__sprintf(const u8 *build_id, int len, char *bf) 74 { 75 char *bid = bf; 76 const u8 *raw = build_id; 77 int i; 78 79 for (i = 0; i < len; ++i) { 80 sprintf(bid, "%02x", *raw); 81 ++raw; 82 bid += 2; 83 } 84 85 return raw - build_id; 86 } 87 88 char *dso__build_id_filename(struct dso *self, char *bf, size_t size) 89 { 90 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 91 92 if (!self->has_build_id) 93 return NULL; 94 95 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); 96 if (bf == NULL) { 97 if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, 98 build_id_hex, build_id_hex + 2) < 0) 99 return NULL; 100 } else 101 snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, 102 build_id_hex, build_id_hex + 2); 103 return bf; 104 } 105