| 1 | |
| 2 | #include <perf/threadmap.h>
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| 3 | #include <stdlib.h>
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| 4 | #include <linux/refcount.h>
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| 5 | #include <internal/threadmap.h>
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| 6 | #include <string.h>
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| 7 | #include <asm/bug.h>
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| 8 | #include <stdio.h>
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| 9 |
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| 10 | static void perf_thread_map__reset(struct perf_thread_map *map, int start, int nr)
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| 11 | {
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| 12 | size_t size = (nr - start) * sizeof(map->map[0]);
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| 13 |
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| 14 | memset(&map->map[start], 0, size);
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| 15 | map->err_thread = -1;
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| 16 | }
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| 17 |
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| 18 | struct perf_thread_map *perf_thread_map__realloc(struct perf_thread_map *map, int nr)
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| 19 | {
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| 20 | size_t size = sizeof(*map) + sizeof(map->map[0]) * nr;
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| 21 | int start = map ? map->nr : 0;
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| 22 |
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| 23 | map = realloc(map, size);
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| 24 | |
| 25 | * We only realloc to add more items, let's reset new items.
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| 26 |
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| 27 | if (map)
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| 28 | perf_thread_map__reset(map, start, nr);
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| 29 |
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| 30 | return map;
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| 31 | }
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| 32 |
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| 33 | #define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr)
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| 34 |
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| 35 | void perf_thread_map__set_pid(struct perf_thread_map *map, int idx, pid_t pid)
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| 36 | {
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| 37 | map->map[idx].pid = pid;
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| 38 | }
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| 39 |
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| 40 | char *perf_thread_map__comm(struct perf_thread_map *map, int idx)
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| 41 | {
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| 42 | return map->map[idx].comm;
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| 43 | }
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| 44 |
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| 45 | struct perf_thread_map *perf_thread_map__new_array(int nr_threads, pid_t *array)
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| 46 | {
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| 47 | struct perf_thread_map *threads = thread_map__alloc(nr_threads);
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| 48 | int i;
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| 49 |
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| 50 | if (!threads)
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| 51 | return NULL;
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| 52 |
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| 53 | for (i = 0; i < nr_threads; i++)
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| 54 | perf_thread_map__set_pid(threads, i, array ? array[i] : -1);
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| 55 |
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| 56 | threads->nr = nr_threads;
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| 57 | refcount_set(&threads->refcnt, 1);
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| 58 |
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| 59 | return threads;
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| 60 | }
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| 61 |
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| 62 | struct perf_thread_map *perf_thread_map__new_dummy(void)
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| 63 | {
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| 64 | return perf_thread_map__new_array(1, NULL);
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| 65 | }
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| 66 |
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| 67 | static void perf_thread_map__delete(struct perf_thread_map *threads)
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| 68 | {
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| 69 | if (threads) {
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| 70 | int i;
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| 71 |
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| 72 | WARN_ONCE(refcount_read(&threads->refcnt) != 0,
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| 73 | "thread map refcnt unbalanced\n");
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| 74 | for (i = 0; i < threads->nr; i++)
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| 75 | free(perf_thread_map__comm(threads, i));
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| 76 | free(threads);
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| 77 | }
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| 78 | }
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| 79 |
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| 80 | struct perf_thread_map *perf_thread_map__get(struct perf_thread_map *map)
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| 81 | {
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| 82 | if (map)
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| 83 | refcount_inc(&map->refcnt);
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| 84 | return map;
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| 85 | }
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| 86 |
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| 87 | void perf_thread_map__put(struct perf_thread_map *map)
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| 88 | {
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| 89 | if (map && refcount_dec_and_test(&map->refcnt))
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| 90 | perf_thread_map__delete(map);
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| 91 | }
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| 92 |
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| 93 | int perf_thread_map__nr(struct perf_thread_map *threads)
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| 94 | {
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| 95 | return threads ? threads->nr : 1;
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| 96 | }
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| 97 |
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| 98 | pid_t perf_thread_map__pid(struct perf_thread_map *map, int idx)
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| 99 | {
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| 100 | if (!map) {
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| 101 | assert(idx == 0);
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| 102 | return -1;
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| 103 | }
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| 104 |
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| 105 | return map->map[idx].pid;
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| 106 | }
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| 107 |
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| 108 | int perf_thread_map__idx(struct perf_thread_map *threads, pid_t pid)
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| 109 | {
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| 110 | if (!threads)
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| 111 | return pid == -1 ? 0 : -1;
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| 112 |
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| 113 | for (int i = 0; i < threads->nr; ++i) {
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| 114 | if (threads->map[i].pid == pid)
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| 115 | return i;
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| 116 | }
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| 117 | return -1;
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| 118 | }
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