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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #include <stdlib.h> #include <sys/types.h> #include <sys/sysctl.h> #include <skywalk/os_skywalk_private.h> #include <darwintest.h> /* * Get all entries in the kernel oid, by calling sysctlbyname twice. */ static int sysctl_get_all(const char *oid_name, void **buffer, size_t *len, void *newp, size_t newlen) { int ret; *buffer = NULL; T_ASSERT_POSIX_SUCCESS(ret = sysctlbyname(oid_name, NULL, len, NULL, 0), NULL); if (*len == 0) { /* There's no entry in this oid. */ *buffer = NULL; return 0; } T_EXPECT_NOTNULL(*buffer = malloc(*len), NULL); T_ASSERT_POSIX_SUCCESS(ret = sysctlbyname(oid_name, *buffer, len, newp, newlen), NULL); if (ret != 0) { if (errno == ENOMEM) { free(*buffer); *buffer = NULL; } } return 0; } /* * Get the given amount of data (*len) from the kernel oid, which has total_size * amount of data. */ static int sysctl_get(const char *oid_name, void **buffer, size_t *len, size_t total_size) { int ret; ret = sysctlbyname(oid_name, *buffer, len, NULL, 0); /* * If we ask for less than what the kernel has, sysctlbyname for * SK_STATS_ARENA, SK_STATS_REGION, and SK_STATS_CACHE will return -1 * and set errno to ENOMEM. * If we ask for more than what the kernel has, sysctlbyname for the * aforementioned oids will return 0 and set the *len to the size * mantinated by the kernel. */ if (*len < total_size) { T_ASSERT_EQ(ret, -1, NULL); T_ASSERT_EQ(errno, ENOMEM, NULL); } else { T_ASSERT_POSIX_SUCCESS(ret, NULL); T_ASSERT_EQ(*len, total_size, NULL); } return ret; } T_DECL(skmem_arena_sysctl_get_all, "Get all entries in kern.skywalk.stats.arena") { void *buffer; size_t len; (void) sysctl_get_all(SK_STATS_ARENA, &buffer, &len, NULL, 0); } T_DECL(skmem_region_sysctl_get_all, "Get all entries in kern.skywalk.stats.region") { void *buffer; size_t len; (void) sysctl_get_all(SK_STATS_REGION, &buffer, &len, NULL, 0); } T_DECL(skmem_cache_sysctl_get_all, "Get all entries in kern.skywalk.stats.cache") { void *buffer; size_t len; (void) sysctl_get_all(SK_STATS_CACHE, &buffer, &len, NULL, 0); } T_DECL(skmem_arena_sysctl_get_single, "Get a single entry in kern.skywalk.stats.arena") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_ARENA, NULL, &total_size, NULL, 0), NULL); len = sizeof(struct sk_stats_arena); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_ARENA, total_size); T_LOG("Size of single entry: %zu\n", len); (void) sysctl_get(SK_STATS_ARENA, &buffer, &len, total_size); } T_DECL(skmem_region_sysctl_get_single, "Get a single entry in kern.skywalk.stats.region") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_REGION, NULL, &total_size, NULL, 0), NULL); len = sizeof(struct sk_stats_region); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_REGION, total_size); T_LOG("Size of single entry: %zu\n", len); (void) sysctl_get(SK_STATS_REGION, &buffer, &len, total_size); } T_DECL(skmem_cache_sysctl_get_single, "Get a single entry in kern.skywalk.stats.cache") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_CACHE, NULL, &total_size, NULL, 0), NULL); len = sizeof(struct sk_stats_cache); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_CACHE, total_size); T_LOG("Size of single entry: %zu\n", len); (void) sysctl_get(SK_STATS_CACHE, &buffer, &len, total_size); } T_DECL(skmem_arena_sysctl_get_over, "Ask for more entries than kern.skywalk.stats.arena") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_ARENA, NULL, &total_size, NULL, 0), NULL); len = total_size + sizeof(struct sk_stats_arena); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_ARENA, total_size); T_LOG("Total size + single entry: %zu\n", len); (void) sysctl_get(SK_STATS_ARENA, &buffer, &len, total_size); } T_DECL(skmem_region_sysctl_get_over, "Ask for more entries than kern.skywalk.stats.region") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_REGION, NULL, &total_size, NULL, 0), NULL); len = total_size + sizeof(struct sk_stats_region); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_REGION, total_size); T_LOG("Total size + single entry: %zu\n", len); (void) sysctl_get(SK_STATS_REGION, &buffer, &len, total_size); } T_DECL(skmem_cache_sysctl_get_over, "Ask for more entries than kern.skywalk.stats.cache") { void *buffer; size_t len; size_t total_size; T_ASSERT_POSIX_SUCCESS(sysctlbyname(SK_STATS_CACHE, NULL, &total_size, NULL, 0), NULL); len = total_size + sizeof(struct sk_stats_cache); buffer = malloc(len); T_LOG("Total size of %s: %zu\n", SK_STATS_CACHE, total_size); T_LOG("Total size + single entry: %zu\n", len); (void) sysctl_get(SK_STATS_CACHE, &buffer, &len, total_size); } |