Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
Craig Tiller | 6169d5f | 2016-03-31 07:46:18 -0700 | [diff] [blame] | 3 | * Copyright 2015, Google Inc. |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 34 | #include "src/core/lib/transport/metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 35 | |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 36 | #include <assert.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 37 | #include <stddef.h> |
| 38 | #include <string.h> |
| 39 | |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 40 | #include <grpc/compression.h> |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 41 | #include <grpc/grpc.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 42 | #include <grpc/support/alloc.h> |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 43 | #include <grpc/support/atm.h> |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 44 | #include <grpc/support/log.h> |
Craig Tiller | ebdef9d | 2015-11-19 17:09:49 -0800 | [diff] [blame] | 45 | #include <grpc/support/string_util.h> |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 46 | #include <grpc/support/time.h> |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 47 | |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 48 | #include "src/core/lib/iomgr/iomgr_internal.h" |
| 49 | #include "src/core/lib/profiling/timers.h" |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 50 | #include "src/core/lib/slice/slice_internal.h" |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 51 | #include "src/core/lib/support/murmur_hash.h" |
| 52 | #include "src/core/lib/support/string.h" |
Craig Tiller | 9533d04 | 2016-03-25 17:11:06 -0700 | [diff] [blame] | 53 | #include "src/core/lib/transport/static_metadata.h" |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 54 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 55 | grpc_slice (*grpc_chttp2_base64_encode_and_huffman_compress)(grpc_slice input); |
| 56 | |
Craig Tiller | 70b080d | 2015-11-19 08:04:48 -0800 | [diff] [blame] | 57 | /* There are two kinds of mdelem and mdstr instances. |
| 58 | * Static instances are declared in static_metadata.{h,c} and |
| 59 | * are initialized by grpc_mdctx_global_init(). |
| 60 | * Dynamic instances are stored in hash tables on grpc_mdctx, and are backed |
| 61 | * by internal_string and internal_element structures. |
| 62 | * Internal helper functions here-in (is_mdstr_static, is_mdelem_static) are |
| 63 | * used to determine which kind of element a pointer refers to. |
| 64 | */ |
| 65 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 66 | #define INITIAL_STRTAB_CAPACITY 4 |
| 67 | #define INITIAL_MDTAB_CAPACITY 4 |
| 68 | |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 69 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 70 | #define DEBUG_ARGS , const char *file, int line |
| 71 | #define FWD_DEBUG_ARGS , file, line |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 72 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s), __FILE__, __LINE__) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 73 | #else |
| 74 | #define DEBUG_ARGS |
| 75 | #define FWD_DEBUG_ARGS |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 76 | #define REF_MD_LOCKED(shard, s) ref_md_locked((shard), (s)) |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 77 | #endif |
| 78 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 79 | #define TABLE_IDX(hash, log2_shards, capacity) \ |
| 80 | (((hash) >> (log2_shards)) % (capacity)) |
| 81 | #define SHARD_IDX(hash, log2_shards) ((hash) & ((1 << (log2_shards)) - 1)) |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 82 | |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 83 | typedef void (*destroy_user_data_func)(void *user_data); |
| 84 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 85 | #define SIZE_IN_DECODER_TABLE_NOT_SET -1 |
| 86 | /* Shadow structure for grpc_mdstr for non-static values */ |
| 87 | typedef struct internal_string { |
| 88 | /* must be byte compatible with grpc_mdstr */ |
| 89 | grpc_slice slice; |
| 90 | uint32_t hash; |
| 91 | |
| 92 | /* private only data */ |
| 93 | gpr_atm refcnt; |
| 94 | |
| 95 | uint8_t has_base64_and_huffman_encoded; |
| 96 | grpc_slice_refcount refcount; |
| 97 | |
| 98 | grpc_slice base64_and_huffman; |
| 99 | |
| 100 | gpr_atm size_in_decoder_table; |
| 101 | |
| 102 | struct internal_string *bucket_next; |
| 103 | } internal_string; |
| 104 | |
| 105 | /* Shadow structure for grpc_mdelem for non-static elements */ |
| 106 | typedef struct internal_metadata { |
| 107 | /* must be byte compatible with grpc_mdelem */ |
| 108 | internal_string *key; |
| 109 | internal_string *value; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 110 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 111 | /* private only data */ |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 112 | gpr_atm refcnt; |
| 113 | |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 114 | gpr_mu mu_user_data; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 115 | gpr_atm destroy_user_data; |
| 116 | gpr_atm user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 117 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 118 | struct internal_metadata *bucket_next; |
| 119 | } internal_metadata; |
Craig Tiller | 9ecadce | 2016-11-18 14:52:25 -0800 | [diff] [blame] | 120 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 121 | typedef struct strtab_shard { |
| 122 | gpr_mu mu; |
| 123 | internal_string **strs; |
| 124 | size_t count; |
| 125 | size_t capacity; |
| 126 | } strtab_shard; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 127 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 128 | typedef struct mdtab_shard { |
| 129 | gpr_mu mu; |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 130 | internal_metadata **elems; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 131 | size_t count; |
| 132 | size_t capacity; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 133 | /** Estimate of the number of unreferenced mdelems in the hash table. |
| 134 | This will eventually converge to the exact number, but it's instantaneous |
| 135 | accuracy is not guaranteed */ |
| 136 | gpr_atm free_estimate; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 137 | } mdtab_shard; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 138 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 139 | #define LOG2_STRTAB_SHARD_COUNT 5 |
| 140 | #define LOG2_MDTAB_SHARD_COUNT 4 |
| 141 | #define STRTAB_SHARD_COUNT ((size_t)(1 << LOG2_STRTAB_SHARD_COUNT)) |
| 142 | #define MDTAB_SHARD_COUNT ((size_t)(1 << LOG2_MDTAB_SHARD_COUNT)) |
| 143 | |
| 144 | /* hash seed: decided at initialization time */ |
| 145 | static uint32_t g_hash_seed; |
| 146 | static int g_forced_hash_seed = 0; |
| 147 | |
| 148 | /* linearly probed hash tables for static element lookup */ |
| 149 | static grpc_mdstr *g_static_strtab[GRPC_STATIC_MDSTR_COUNT * 2]; |
| 150 | static grpc_mdelem *g_static_mdtab[GRPC_STATIC_MDELEM_COUNT * 2]; |
| 151 | static size_t g_static_strtab_maxprobe; |
| 152 | static size_t g_static_mdtab_maxprobe; |
| 153 | |
| 154 | static strtab_shard g_strtab_shard[STRTAB_SHARD_COUNT]; |
| 155 | static mdtab_shard g_mdtab_shard[MDTAB_SHARD_COUNT]; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 156 | |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 157 | static void gc_mdtab(grpc_exec_ctx *exec_ctx, mdtab_shard *shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 158 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 159 | void grpc_test_only_set_metadata_hash_seed(uint32_t seed) { |
| 160 | g_hash_seed = seed; |
| 161 | g_forced_hash_seed = 1; |
| 162 | } |
| 163 | |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 164 | void grpc_mdctx_global_init(void) { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 165 | size_t i, j; |
| 166 | if (!g_forced_hash_seed) { |
| 167 | g_hash_seed = (uint32_t)gpr_now(GPR_CLOCK_REALTIME).tv_nsec; |
| 168 | } |
| 169 | g_static_strtab_maxprobe = 0; |
| 170 | g_static_mdtab_maxprobe = 0; |
| 171 | /* build static tables */ |
| 172 | memset(g_static_mdtab, 0, sizeof(g_static_mdtab)); |
| 173 | memset(g_static_strtab, 0, sizeof(g_static_strtab)); |
| 174 | for (i = 0; i < GRPC_STATIC_MDSTR_COUNT; i++) { |
| 175 | grpc_mdstr *elem = &grpc_static_mdstr_table[i]; |
| 176 | const char *str = grpc_static_metadata_strings[i]; |
| 177 | uint32_t hash = gpr_murmur_hash3(str, strlen(str), g_hash_seed); |
| 178 | *(grpc_slice *)&elem->slice = grpc_slice_from_static_string(str); |
| 179 | *(uint32_t *)&elem->hash = hash; |
| 180 | for (j = 0;; j++) { |
| 181 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_strtab); |
| 182 | if (g_static_strtab[idx] == NULL) { |
| 183 | g_static_strtab[idx] = &grpc_static_mdstr_table[i]; |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | if (j > g_static_strtab_maxprobe) { |
| 188 | g_static_strtab_maxprobe = j; |
| 189 | } |
| 190 | } |
| 191 | for (i = 0; i < GRPC_STATIC_MDELEM_COUNT; i++) { |
| 192 | grpc_mdelem *elem = &grpc_static_mdelem_table[i]; |
| 193 | grpc_mdstr *key = |
| 194 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 0]]; |
| 195 | grpc_mdstr *value = |
| 196 | &grpc_static_mdstr_table[grpc_static_metadata_elem_indices[2 * i + 1]]; |
| 197 | uint32_t hash = GRPC_MDSTR_KV_HASH(key->hash, value->hash); |
| 198 | *(grpc_mdstr **)&elem->key = key; |
| 199 | *(grpc_mdstr **)&elem->value = value; |
| 200 | for (j = 0;; j++) { |
| 201 | size_t idx = (hash + j) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 202 | if (g_static_mdtab[idx] == NULL) { |
| 203 | g_static_mdtab[idx] = elem; |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | if (j > g_static_mdtab_maxprobe) { |
| 208 | g_static_mdtab_maxprobe = j; |
| 209 | } |
| 210 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 211 | /* initialize shards */ |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 212 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 213 | strtab_shard *shard = &g_strtab_shard[i]; |
| 214 | gpr_mu_init(&shard->mu); |
| 215 | shard->count = 0; |
| 216 | shard->capacity = INITIAL_STRTAB_CAPACITY; |
| 217 | shard->strs = gpr_malloc(sizeof(*shard->strs) * shard->capacity); |
| 218 | memset(shard->strs, 0, sizeof(*shard->strs) * shard->capacity); |
| 219 | } |
| 220 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 221 | mdtab_shard *shard = &g_mdtab_shard[i]; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 222 | gpr_mu_init(&shard->mu); |
| 223 | shard->count = 0; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 224 | gpr_atm_no_barrier_store(&shard->free_estimate, 0); |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 225 | shard->capacity = INITIAL_MDTAB_CAPACITY; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 226 | shard->elems = gpr_malloc(sizeof(*shard->elems) * shard->capacity); |
| 227 | memset(shard->elems, 0, sizeof(*shard->elems) * shard->capacity); |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 228 | } |
| 229 | } |
| 230 | |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 231 | void grpc_mdctx_global_shutdown(grpc_exec_ctx *exec_ctx) { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 232 | size_t i; |
| 233 | for (i = 0; i < MDTAB_SHARD_COUNT; i++) { |
| 234 | mdtab_shard *shard = &g_mdtab_shard[i]; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 235 | gpr_mu_destroy(&shard->mu); |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 236 | gc_mdtab(exec_ctx, shard); |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 237 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 238 | if (shard->count != 0) { |
Yuchen Zeng | 64c0e8d | 2016-06-10 11:19:51 -0700 | [diff] [blame] | 239 | gpr_log(GPR_DEBUG, "WARNING: %" PRIuPTR " metadata elements were leaked", |
yang-g | d88e1d8 | 2015-12-02 13:23:33 -0800 | [diff] [blame] | 240 | shard->count); |
Craig Tiller | 0cb803d | 2016-03-02 22:17:24 -0800 | [diff] [blame] | 241 | if (grpc_iomgr_abort_on_leaks()) { |
| 242 | abort(); |
| 243 | } |
Craig Tiller | 3407544 | 2015-11-23 16:16:54 -0800 | [diff] [blame] | 244 | } |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 245 | gpr_free(shard->elems); |
| 246 | } |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 247 | for (i = 0; i < STRTAB_SHARD_COUNT; i++) { |
| 248 | strtab_shard *shard = &g_strtab_shard[i]; |
| 249 | gpr_mu_destroy(&shard->mu); |
| 250 | /* TODO(ctiller): GPR_ASSERT(shard->count == 0); */ |
| 251 | if (shard->count != 0) { |
| 252 | gpr_log(GPR_DEBUG, "WARNING: %" PRIuPTR " metadata strings were leaked", |
| 253 | shard->count); |
| 254 | for (size_t j = 0; j < shard->capacity; j++) { |
| 255 | for (internal_string *s = shard->strs[j]; s; s = s->bucket_next) { |
| 256 | gpr_log(GPR_DEBUG, "LEAKED: %s", |
| 257 | grpc_mdstr_as_c_string((grpc_mdstr *)s)); |
| 258 | } |
| 259 | } |
| 260 | if (grpc_iomgr_abort_on_leaks()) { |
| 261 | abort(); |
| 262 | } |
| 263 | } |
| 264 | gpr_free(shard->strs); |
| 265 | } |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 266 | } |
| 267 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 268 | static int is_mdstr_static(grpc_mdstr *s) { |
| 269 | return s >= &grpc_static_mdstr_table[0] && |
| 270 | s < &grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT]; |
| 271 | } |
| 272 | |
| 273 | static int is_mdelem_static(grpc_mdelem *e) { |
| 274 | return e >= &grpc_static_mdelem_table[0] && |
| 275 | e < &grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT]; |
Craig Tiller | 0e72ede | 2015-11-19 07:48:53 -0800 | [diff] [blame] | 276 | } |
| 277 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 278 | static void ref_md_locked(mdtab_shard *shard, |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 279 | internal_metadata *md DEBUG_ARGS) { |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 280 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 281 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
David Garcia Quintas | 331b9c0 | 2016-09-12 18:37:05 -0700 | [diff] [blame] | 282 | "ELM REF:%p:%zu->%zu: '%s' = '%s'", (void *)md, |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 283 | gpr_atm_no_barrier_load(&md->refcnt), |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 284 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 285 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 286 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 287 | #endif |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 288 | if (0 == gpr_atm_no_barrier_fetch_add(&md->refcnt, 1)) { |
| 289 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, -1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 290 | } |
| 291 | } |
| 292 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 293 | static void grow_strtab(strtab_shard *shard) { |
| 294 | size_t capacity = shard->capacity * 2; |
| 295 | size_t i; |
| 296 | internal_string **strtab; |
| 297 | internal_string *s, *next; |
| 298 | |
| 299 | GPR_TIMER_BEGIN("grow_strtab", 0); |
| 300 | |
| 301 | strtab = gpr_malloc(sizeof(internal_string *) * capacity); |
| 302 | memset(strtab, 0, sizeof(internal_string *) * capacity); |
| 303 | |
| 304 | for (i = 0; i < shard->capacity; i++) { |
| 305 | for (s = shard->strs[i]; s; s = next) { |
| 306 | size_t idx = TABLE_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT, capacity); |
| 307 | next = s->bucket_next; |
| 308 | s->bucket_next = strtab[idx]; |
| 309 | strtab[idx] = s; |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | gpr_free(shard->strs); |
| 314 | shard->strs = strtab; |
| 315 | shard->capacity = capacity; |
| 316 | |
| 317 | GPR_TIMER_END("grow_strtab", 0); |
| 318 | } |
| 319 | |
| 320 | static void internal_destroy_string(grpc_exec_ctx *exec_ctx, |
| 321 | strtab_shard *shard, internal_string *is) { |
| 322 | internal_string **prev_next; |
| 323 | internal_string *cur; |
| 324 | GPR_TIMER_BEGIN("internal_destroy_string", 0); |
| 325 | if (is->has_base64_and_huffman_encoded) { |
| 326 | grpc_slice_unref_internal(exec_ctx, is->base64_and_huffman); |
| 327 | } |
| 328 | for (prev_next = &shard->strs[TABLE_IDX(is->hash, LOG2_STRTAB_SHARD_COUNT, |
| 329 | shard->capacity)], |
| 330 | cur = *prev_next; |
| 331 | cur != is; prev_next = &cur->bucket_next, cur = cur->bucket_next) |
| 332 | ; |
| 333 | *prev_next = cur->bucket_next; |
| 334 | shard->count--; |
| 335 | gpr_free(is); |
| 336 | GPR_TIMER_END("internal_destroy_string", 0); |
| 337 | } |
| 338 | |
| 339 | static void slice_ref(void *p) { |
| 340 | internal_string *is = |
| 341 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
| 342 | GRPC_MDSTR_REF((grpc_mdstr *)(is)); |
| 343 | } |
| 344 | |
| 345 | static void slice_unref(grpc_exec_ctx *exec_ctx, void *p) { |
| 346 | internal_string *is = |
| 347 | (internal_string *)((char *)p - offsetof(internal_string, refcount)); |
| 348 | GRPC_MDSTR_UNREF(exec_ctx, (grpc_mdstr *)(is)); |
| 349 | } |
| 350 | |
| 351 | grpc_mdstr *grpc_mdstr_from_string(const char *str) { |
| 352 | return grpc_mdstr_from_buffer((const uint8_t *)str, strlen(str)); |
| 353 | } |
| 354 | |
| 355 | grpc_mdstr *grpc_mdstr_from_slice(grpc_exec_ctx *exec_ctx, grpc_slice slice) { |
| 356 | grpc_mdstr *result = grpc_mdstr_from_buffer(GRPC_SLICE_START_PTR(slice), |
| 357 | GRPC_SLICE_LENGTH(slice)); |
| 358 | grpc_slice_unref_internal(exec_ctx, slice); |
| 359 | return result; |
| 360 | } |
| 361 | |
| 362 | grpc_mdstr *grpc_mdstr_from_buffer(const uint8_t *buf, size_t length) { |
| 363 | uint32_t hash = gpr_murmur_hash3(buf, length, g_hash_seed); |
| 364 | internal_string *s; |
| 365 | strtab_shard *shard = |
| 366 | &g_strtab_shard[SHARD_IDX(hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 367 | size_t i; |
| 368 | size_t idx; |
| 369 | |
| 370 | GPR_TIMER_BEGIN("grpc_mdstr_from_buffer", 0); |
| 371 | |
| 372 | /* search for a static string */ |
| 373 | for (i = 0; i <= g_static_strtab_maxprobe; i++) { |
| 374 | grpc_mdstr *ss; |
| 375 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_strtab); |
| 376 | ss = g_static_strtab[idx]; |
| 377 | if (ss == NULL) break; |
| 378 | if (ss->hash == hash && GRPC_SLICE_LENGTH(ss->slice) == length && |
| 379 | (length == 0 || |
| 380 | 0 == memcmp(buf, GRPC_SLICE_START_PTR(ss->slice), length))) { |
| 381 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
| 382 | return ss; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | gpr_mu_lock(&shard->mu); |
| 387 | |
| 388 | /* search for an existing string */ |
| 389 | idx = TABLE_IDX(hash, LOG2_STRTAB_SHARD_COUNT, shard->capacity); |
| 390 | for (s = shard->strs[idx]; s; s = s->bucket_next) { |
| 391 | if (s->hash == hash && GRPC_SLICE_LENGTH(s->slice) == length && |
| 392 | 0 == memcmp(buf, GRPC_SLICE_START_PTR(s->slice), length)) { |
| 393 | if (gpr_atm_full_fetch_add(&s->refcnt, 1) == 0) { |
| 394 | /* If we get here, we've added a ref to something that was about to |
| 395 | * die - drop it immediately. |
| 396 | * The *only* possible path here (given the shard mutex) should be to |
| 397 | * drop from one ref back to zero - assert that with a CAS */ |
| 398 | GPR_ASSERT(gpr_atm_rel_cas(&s->refcnt, 1, 0)); |
| 399 | /* and treat this as if we were never here... sshhh */ |
| 400 | } else { |
| 401 | gpr_mu_unlock(&shard->mu); |
| 402 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
| 403 | return (grpc_mdstr *)s; |
| 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /* not found: create a new string */ |
| 409 | if (length + 1 < GRPC_SLICE_INLINED_SIZE) { |
| 410 | /* string data goes directly into the slice */ |
| 411 | s = gpr_malloc(sizeof(internal_string)); |
| 412 | gpr_atm_rel_store(&s->refcnt, 1); |
| 413 | s->slice.refcount = NULL; |
| 414 | memcpy(s->slice.data.inlined.bytes, buf, length); |
| 415 | s->slice.data.inlined.bytes[length] = 0; |
| 416 | s->slice.data.inlined.length = (uint8_t)length; |
| 417 | } else { |
| 418 | /* string data goes after the internal_string header, and we +1 for null |
| 419 | terminator */ |
| 420 | s = gpr_malloc(sizeof(internal_string) + length + 1); |
| 421 | gpr_atm_rel_store(&s->refcnt, 1); |
| 422 | s->refcount.ref = slice_ref; |
| 423 | s->refcount.unref = slice_unref; |
| 424 | s->slice.refcount = &s->refcount; |
| 425 | s->slice.data.refcounted.bytes = (uint8_t *)(s + 1); |
| 426 | s->slice.data.refcounted.length = length; |
| 427 | memcpy(s->slice.data.refcounted.bytes, buf, length); |
| 428 | /* add a null terminator for cheap c string conversion when desired */ |
| 429 | s->slice.data.refcounted.bytes[length] = 0; |
| 430 | } |
| 431 | s->has_base64_and_huffman_encoded = 0; |
| 432 | s->hash = hash; |
| 433 | s->size_in_decoder_table = SIZE_IN_DECODER_TABLE_NOT_SET; |
| 434 | s->bucket_next = shard->strs[idx]; |
| 435 | shard->strs[idx] = s; |
| 436 | |
| 437 | shard->count++; |
| 438 | |
| 439 | if (shard->count > shard->capacity * 2) { |
| 440 | grow_strtab(shard); |
| 441 | } |
| 442 | |
| 443 | gpr_mu_unlock(&shard->mu); |
| 444 | GPR_TIMER_END("grpc_mdstr_from_buffer", 0); |
| 445 | |
| 446 | return (grpc_mdstr *)s; |
| 447 | } |
| 448 | |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 449 | static void gc_mdtab(grpc_exec_ctx *exec_ctx, mdtab_shard *shard) { |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 450 | size_t i; |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 451 | internal_metadata **prev_next; |
| 452 | internal_metadata *md, *next; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 453 | gpr_atm num_freed = 0; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 454 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 455 | GPR_TIMER_BEGIN("gc_mdtab", 0); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 456 | for (i = 0; i < shard->capacity; i++) { |
| 457 | prev_next = &shard->elems[i]; |
| 458 | for (md = shard->elems[i]; md; md = next) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 459 | void *user_data = (void *)gpr_atm_no_barrier_load(&md->user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 460 | next = md->bucket_next; |
Craig Tiller | 9fa41b9 | 2015-04-10 15:08:03 -0700 | [diff] [blame] | 461 | if (gpr_atm_acq_load(&md->refcnt) == 0) { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 462 | GRPC_MDSTR_UNREF(exec_ctx, (grpc_mdstr *)md->key); |
| 463 | GRPC_MDSTR_UNREF(exec_ctx, (grpc_mdstr *)md->value); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 464 | if (md->user_data) { |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 465 | ((destroy_user_data_func)gpr_atm_no_barrier_load( |
| 466 | &md->destroy_user_data))(user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 467 | } |
| 468 | gpr_free(md); |
| 469 | *prev_next = next; |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 470 | num_freed++; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 471 | shard->count--; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 472 | } else { |
| 473 | prev_next = &md->bucket_next; |
| 474 | } |
| 475 | } |
| 476 | } |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 477 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, -num_freed); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 478 | GPR_TIMER_END("gc_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 479 | } |
| 480 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 481 | static void grow_mdtab(mdtab_shard *shard) { |
| 482 | size_t capacity = shard->capacity * 2; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 483 | size_t i; |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 484 | internal_metadata **mdtab; |
| 485 | internal_metadata *md, *next; |
Craig Tiller | 7536af0 | 2015-12-22 13:49:30 -0800 | [diff] [blame] | 486 | uint32_t hash; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 487 | |
| 488 | GPR_TIMER_BEGIN("grow_mdtab", 0); |
| 489 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 490 | mdtab = gpr_malloc(sizeof(internal_metadata *) * capacity); |
| 491 | memset(mdtab, 0, sizeof(internal_metadata *) * capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 492 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 493 | for (i = 0; i < shard->capacity; i++) { |
| 494 | for (md = shard->elems[i]; md; md = next) { |
| 495 | size_t idx; |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 496 | hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 497 | next = md->bucket_next; |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 498 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, capacity); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 499 | md->bucket_next = mdtab[idx]; |
| 500 | mdtab[idx] = md; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 501 | } |
| 502 | } |
| 503 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 504 | gpr_free(shard->elems); |
| 505 | shard->elems = mdtab; |
| 506 | shard->capacity = capacity; |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 507 | |
| 508 | GPR_TIMER_END("grow_mdtab", 0); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 509 | } |
| 510 | |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 511 | static void rehash_mdtab(grpc_exec_ctx *exec_ctx, mdtab_shard *shard) { |
Craig Tiller | 139098c | 2016-06-06 08:10:08 -0700 | [diff] [blame] | 512 | if (gpr_atm_no_barrier_load(&shard->free_estimate) > |
| 513 | (gpr_atm)(shard->capacity / 4)) { |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 514 | gc_mdtab(exec_ctx, shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 515 | } else { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 516 | grow_mdtab(shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 517 | } |
| 518 | } |
| 519 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 520 | grpc_mdelem *grpc_mdelem_from_metadata_strings(grpc_exec_ctx *exec_ctx, |
| 521 | grpc_mdstr *mkey, |
| 522 | grpc_mdstr *mvalue) { |
| 523 | internal_string *key = (internal_string *)mkey; |
| 524 | internal_string *value = (internal_string *)mvalue; |
| 525 | uint32_t hash = GRPC_MDSTR_KV_HASH(mkey->hash, mvalue->hash); |
| 526 | internal_metadata *md; |
| 527 | mdtab_shard *shard = &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
| 528 | size_t i; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 529 | size_t idx; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 530 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 531 | GPR_TIMER_BEGIN("grpc_mdelem_from_metadata_strings", 0); |
| 532 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 533 | if (is_mdstr_static(mkey) && is_mdstr_static(mvalue)) { |
| 534 | for (i = 0; i <= g_static_mdtab_maxprobe; i++) { |
| 535 | grpc_mdelem *smd; |
| 536 | idx = (hash + i) % GPR_ARRAY_SIZE(g_static_mdtab); |
| 537 | smd = g_static_mdtab[idx]; |
| 538 | if (smd == NULL) break; |
| 539 | if (smd->key == mkey && smd->value == mvalue) { |
| 540 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
| 541 | return smd; |
| 542 | } |
| 543 | } |
| 544 | } |
| 545 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 546 | gpr_mu_lock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 547 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 548 | idx = TABLE_IDX(hash, LOG2_MDTAB_SHARD_COUNT, shard->capacity); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 549 | /* search for an existing pair */ |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 550 | for (md = shard->elems[idx]; md; md = md->bucket_next) { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 551 | if (md->key == key && md->value == value) { |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 552 | REF_MD_LOCKED(shard, md); |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 553 | GRPC_MDSTR_UNREF(exec_ctx, (grpc_mdstr *)key); |
| 554 | GRPC_MDSTR_UNREF(exec_ctx, (grpc_mdstr *)value); |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 555 | gpr_mu_unlock(&shard->mu); |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 556 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 557 | return (grpc_mdelem *)md; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 558 | } |
| 559 | } |
| 560 | |
| 561 | /* not found: create a new pair */ |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 562 | md = gpr_malloc(sizeof(internal_metadata)); |
Craig Tiller | 8d8f9a8 | 2016-06-03 08:49:11 -0700 | [diff] [blame] | 563 | gpr_atm_rel_store(&md->refcnt, 1); |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 564 | md->key = key; |
| 565 | md->value = value; |
Craig Tiller | 8344daa | 2015-10-09 18:10:57 -0700 | [diff] [blame] | 566 | md->user_data = 0; |
| 567 | md->destroy_user_data = 0; |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 568 | md->bucket_next = shard->elems[idx]; |
| 569 | shard->elems[idx] = md; |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 570 | gpr_mu_init(&md->mu_user_data); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 571 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
David Garcia Quintas | 331b9c0 | 2016-09-12 18:37:05 -0700 | [diff] [blame] | 572 | gpr_log(GPR_DEBUG, "ELM NEW:%p:%zu: '%s' = '%s'", (void *)md, |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 573 | gpr_atm_no_barrier_load(&md->refcnt), |
| 574 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 575 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 576 | #endif |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 577 | shard->count++; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 578 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 579 | if (shard->count > shard->capacity * 2) { |
Craig Tiller | a59c16c | 2016-10-31 07:25:01 -0700 | [diff] [blame] | 580 | rehash_mdtab(exec_ctx, shard); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 581 | } |
| 582 | |
Craig Tiller | b2b4261 | 2015-11-20 12:02:17 -0800 | [diff] [blame] | 583 | gpr_mu_unlock(&shard->mu); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 584 | |
Craig Tiller | 9d35a1f | 2015-11-02 14:16:12 -0800 | [diff] [blame] | 585 | GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0); |
| 586 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 587 | return (grpc_mdelem *)md; |
Craig Tiller | 9ecadce | 2016-11-18 14:52:25 -0800 | [diff] [blame] | 588 | } |
| 589 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 590 | grpc_mdelem *grpc_mdelem_from_strings(grpc_exec_ctx *exec_ctx, const char *key, |
| 591 | const char *value) { |
| 592 | return grpc_mdelem_from_metadata_strings( |
| 593 | exec_ctx, grpc_mdstr_from_string(key), grpc_mdstr_from_string(value)); |
Craig Tiller | 9ecadce | 2016-11-18 14:52:25 -0800 | [diff] [blame] | 594 | } |
| 595 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 596 | grpc_mdelem *grpc_mdelem_from_slices(grpc_exec_ctx *exec_ctx, grpc_slice key, |
| 597 | grpc_slice value) { |
| 598 | return grpc_mdelem_from_metadata_strings( |
| 599 | exec_ctx, grpc_mdstr_from_slice(exec_ctx, key), |
| 600 | grpc_mdstr_from_slice(exec_ctx, value)); |
| 601 | } |
| 602 | |
| 603 | grpc_mdelem *grpc_mdelem_from_string_and_buffer(grpc_exec_ctx *exec_ctx, |
| 604 | const char *key, |
| 605 | const uint8_t *value, |
| 606 | size_t value_length) { |
| 607 | return grpc_mdelem_from_metadata_strings( |
| 608 | exec_ctx, grpc_mdstr_from_string(key), |
| 609 | grpc_mdstr_from_buffer(value, value_length)); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 610 | } |
| 611 | |
yang-g | 24ba7c1 | 2016-03-30 16:19:43 -0700 | [diff] [blame] | 612 | static size_t get_base64_encoded_size(size_t raw_length) { |
| 613 | static const uint8_t tail_xtra[3] = {0, 2, 3}; |
| 614 | return raw_length / 3 * 4 + tail_xtra[raw_length % 3]; |
| 615 | } |
| 616 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 617 | size_t grpc_mdelem_get_size_in_hpack_table(grpc_mdelem *elem) { |
| 618 | size_t overhead_and_key = 32 + GRPC_SLICE_LENGTH(elem->key->slice); |
| 619 | size_t value_len = GRPC_SLICE_LENGTH(elem->value->slice); |
| 620 | if (is_mdstr_static(elem->value)) { |
| 621 | if (grpc_is_binary_header( |
| 622 | (const char *)GRPC_SLICE_START_PTR(elem->key->slice), |
| 623 | GRPC_SLICE_LENGTH(elem->key->slice))) { |
| 624 | return overhead_and_key + get_base64_encoded_size(value_len); |
| 625 | } else { |
| 626 | return overhead_and_key + value_len; |
| 627 | } |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 628 | } else { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 629 | internal_string *is = (internal_string *)elem->value; |
| 630 | gpr_atm current_size = gpr_atm_acq_load(&is->size_in_decoder_table); |
| 631 | if (current_size == SIZE_IN_DECODER_TABLE_NOT_SET) { |
| 632 | if (grpc_is_binary_header( |
| 633 | (const char *)GRPC_SLICE_START_PTR(elem->key->slice), |
| 634 | GRPC_SLICE_LENGTH(elem->key->slice))) { |
| 635 | current_size = (gpr_atm)get_base64_encoded_size(value_len); |
| 636 | } else { |
| 637 | current_size = (gpr_atm)value_len; |
| 638 | } |
| 639 | gpr_atm_rel_store(&is->size_in_decoder_table, current_size); |
| 640 | } |
| 641 | return overhead_and_key + (size_t)current_size; |
yang-g | cb7a802 | 2016-03-30 14:58:53 -0700 | [diff] [blame] | 642 | } |
| 643 | } |
| 644 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 645 | grpc_mdelem *grpc_mdelem_ref(grpc_mdelem *gmd DEBUG_ARGS) { |
| 646 | internal_metadata *md = (internal_metadata *)gmd; |
| 647 | if (is_mdelem_static(gmd)) return gmd; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 648 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 649 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 650 | "ELM REF:%p:%zu->%zu: '%s' = '%s'", (void *)md, |
| 651 | gpr_atm_no_barrier_load(&md->refcnt), |
| 652 | gpr_atm_no_barrier_load(&md->refcnt) + 1, |
| 653 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 654 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 655 | #endif |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 656 | /* we can assume the ref count is >= 1 as the application is calling |
| 657 | this function - meaning that no adjustment to mdtab_free is necessary, |
| 658 | simplifying the logic here to be just an atomic increment */ |
| 659 | /* use C assert to have this removed in opt builds */ |
| 660 | GPR_ASSERT(gpr_atm_no_barrier_load(&md->refcnt) >= 1); |
| 661 | gpr_atm_no_barrier_fetch_add(&md->refcnt, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 662 | return gmd; |
| 663 | } |
| 664 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 665 | void grpc_mdelem_unref(grpc_exec_ctx *exec_ctx, grpc_mdelem *gmd DEBUG_ARGS) { |
| 666 | internal_metadata *md = (internal_metadata *)gmd; |
| 667 | if (!md) return; |
| 668 | if (is_mdelem_static(gmd)) return; |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 669 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 670 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| 671 | "ELM UNREF:%p:%zu->%zu: '%s' = '%s'", (void *)md, |
| 672 | gpr_atm_no_barrier_load(&md->refcnt), |
| 673 | gpr_atm_no_barrier_load(&md->refcnt) - 1, |
| 674 | grpc_mdstr_as_c_string((grpc_mdstr *)md->key), |
| 675 | grpc_mdstr_as_c_string((grpc_mdstr *)md->value)); |
Craig Tiller | 1a65a23 | 2015-07-06 10:22:32 -0700 | [diff] [blame] | 676 | #endif |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 677 | uint32_t hash = GRPC_MDSTR_KV_HASH(md->key->hash, md->value->hash); |
| 678 | const gpr_atm prev_refcount = gpr_atm_full_fetch_add(&md->refcnt, -1); |
| 679 | GPR_ASSERT(prev_refcount >= 1); |
| 680 | if (1 == prev_refcount) { |
| 681 | /* once the refcount hits zero, some other thread can come along and |
| 682 | free md at any time: it's unsafe from this point on to access it */ |
| 683 | mdtab_shard *shard = |
| 684 | &g_mdtab_shard[SHARD_IDX(hash, LOG2_MDTAB_SHARD_COUNT)]; |
| 685 | gpr_atm_no_barrier_fetch_add(&shard->free_estimate, 1); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 686 | } |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 687 | } |
| 688 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 689 | const char *grpc_mdstr_as_c_string(const grpc_mdstr *s) { |
| 690 | return (const char *)GRPC_SLICE_START_PTR(s->slice); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 691 | } |
| 692 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 693 | size_t grpc_mdstr_length(const grpc_mdstr *s) { return GRPC_MDSTR_LENGTH(s); } |
| 694 | |
| 695 | grpc_mdstr *grpc_mdstr_ref(grpc_mdstr *gs DEBUG_ARGS) { |
| 696 | internal_string *s = (internal_string *)gs; |
| 697 | if (is_mdstr_static(gs)) return gs; |
| 698 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 699 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR REF:%p:%zu->%zu: '%s'", |
| 700 | (void *)s, gpr_atm_no_barrier_load(&s->refcnt), |
| 701 | gpr_atm_no_barrier_load(&s->refcnt) + 1, grpc_mdstr_as_c_string(gs)); |
| 702 | #endif |
| 703 | GPR_ASSERT(gpr_atm_full_fetch_add(&s->refcnt, 1) > 0); |
| 704 | return gs; |
| 705 | } |
| 706 | |
| 707 | void grpc_mdstr_unref(grpc_exec_ctx *exec_ctx, grpc_mdstr *gs DEBUG_ARGS) { |
| 708 | internal_string *s = (internal_string *)gs; |
| 709 | if (is_mdstr_static(gs)) return; |
| 710 | #ifdef GRPC_METADATA_REFCOUNT_DEBUG |
| 711 | gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "STR UNREF:%p:%zu->%zu: '%s'", |
| 712 | (void *)s, gpr_atm_no_barrier_load(&s->refcnt), |
| 713 | gpr_atm_no_barrier_load(&s->refcnt) - 1, grpc_mdstr_as_c_string(gs)); |
| 714 | #endif |
| 715 | if (1 == gpr_atm_full_fetch_add(&s->refcnt, -1)) { |
| 716 | strtab_shard *shard = |
| 717 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 718 | gpr_mu_lock(&shard->mu); |
| 719 | GPR_ASSERT(0 == gpr_atm_no_barrier_load(&s->refcnt)); |
| 720 | internal_destroy_string(exec_ctx, shard, s); |
| 721 | gpr_mu_unlock(&shard->mu); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | void *grpc_mdelem_get_user_data(grpc_mdelem *md, void (*destroy_func)(void *)) { |
| 726 | internal_metadata *im = (internal_metadata *)md; |
| 727 | void *result; |
| 728 | if (is_mdelem_static(md)) { |
| 729 | return (void *)grpc_static_mdelem_user_data[md - grpc_static_mdelem_table]; |
| 730 | } |
| 731 | if (gpr_atm_acq_load(&im->destroy_user_data) == (gpr_atm)destroy_func) { |
| 732 | return (void *)gpr_atm_no_barrier_load(&im->user_data); |
| 733 | } else { |
| 734 | return NULL; |
| 735 | } |
| 736 | return result; |
| 737 | } |
| 738 | |
| 739 | void *grpc_mdelem_set_user_data(grpc_mdelem *md, void (*destroy_func)(void *), |
Craig Tiller | 738e6db | 2016-11-15 09:29:44 -0800 | [diff] [blame] | 740 | void *user_data) { |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 741 | internal_metadata *im = (internal_metadata *)md; |
| 742 | GPR_ASSERT(!is_mdelem_static(md)); |
| 743 | GPR_ASSERT((user_data == NULL) == (destroy_func == NULL)); |
| 744 | gpr_mu_lock(&im->mu_user_data); |
| 745 | if (gpr_atm_no_barrier_load(&im->destroy_user_data)) { |
| 746 | /* user data can only be set once */ |
| 747 | gpr_mu_unlock(&im->mu_user_data); |
| 748 | if (destroy_func != NULL) { |
Craig Tiller | 8390153 | 2015-07-10 14:02:45 -0700 | [diff] [blame] | 749 | destroy_func(user_data); |
| 750 | } |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 751 | return (void *)gpr_atm_no_barrier_load(&im->user_data); |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 752 | } |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 753 | gpr_atm_no_barrier_store(&im->user_data, (gpr_atm)user_data); |
| 754 | gpr_atm_rel_store(&im->destroy_user_data, (gpr_atm)destroy_func); |
| 755 | gpr_mu_unlock(&im->mu_user_data); |
| 756 | return user_data; |
Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame] | 757 | } |
Craig Tiller | 0160de9 | 2016-11-18 08:46:46 -0800 | [diff] [blame] | 758 | |
Craig Tiller | 5e01e2a | 2017-01-20 18:11:52 -0800 | [diff] [blame^] | 759 | grpc_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) { |
| 760 | internal_string *s = (internal_string *)gs; |
| 761 | grpc_slice slice; |
| 762 | strtab_shard *shard = |
| 763 | &g_strtab_shard[SHARD_IDX(s->hash, LOG2_STRTAB_SHARD_COUNT)]; |
| 764 | gpr_mu_lock(&shard->mu); |
| 765 | if (!s->has_base64_and_huffman_encoded) { |
| 766 | s->base64_and_huffman = |
| 767 | grpc_chttp2_base64_encode_and_huffman_compress(s->slice); |
| 768 | s->has_base64_and_huffman_encoded = 1; |
| 769 | } |
| 770 | slice = s->base64_and_huffman; |
| 771 | gpr_mu_unlock(&shard->mu); |
| 772 | return slice; |
Craig Tiller | 0160de9 | 2016-11-18 08:46:46 -0800 | [diff] [blame] | 773 | } |