| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 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 | static int build_id__mark_dso_hit(struct perf_tool *tool __used, |
| 20 | union perf_event *event, |
| 21 | struct perf_sample *sample __used, |
| 22 | struct perf_evsel *evsel __used, |
| 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 __used, |
| 45 | union perf_event *event, |
| 46 | struct perf_sample *sample __used, |
| 47 | struct machine *machine) |
| 48 | { |
| 49 | struct thread *thread = machine__findnew_thread(machine, event->fork.tid); |
| 50 | |
| 51 | dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, |
| 52 | event->fork.ppid, event->fork.ptid); |
| 53 | |
| 54 | if (thread) { |
| 55 | rb_erase(&thread->rb_node, &machine->threads); |
| 56 | machine->last_match = NULL; |
| 57 | thread__delete(thread); |
| 58 | } |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | struct perf_tool build_id__mark_dso_hit_ops = { |
| 64 | .sample = build_id__mark_dso_hit, |
| 65 | .mmap = perf_event__process_mmap, |
| 66 | .fork = perf_event__process_task, |
| 67 | .exit = perf_event__exit_del_thread, |
| 68 | }; |
| 69 | |
| 70 | char *dso__build_id_filename(struct dso *self, char *bf, size_t size) |
| 71 | { |
| 72 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
| 73 | |
| 74 | if (!self->has_build_id) |
| 75 | return NULL; |
| 76 | |
| 77 | build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex); |
| 78 | if (bf == NULL) { |
| 79 | if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir, |
| 80 | build_id_hex, build_id_hex + 2) < 0) |
| 81 | return NULL; |
| 82 | } else |
| 83 | snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir, |
| 84 | build_id_hex, build_id_hex + 2); |
| 85 | return bf; |
| 86 | } |