Mercurial > hg > nginx-quic
annotate src/core/ngx_palloc.c @ 7162:8b84d60ef13d
Fixed "changing binary" when reaper is not init.
On some systems, it's possible that reaper of orphaned processes is
set to something other than "init" process. On such systems, the
changing binary procedure did not work.
The fix is to check if PPID has changed, instead of assuming it's
always 1 for orphaned processes.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Tue, 28 Nov 2017 12:00:24 +0300 |
parents | ad2360782ecd |
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rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 |
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11 |
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12 static ngx_inline void *ngx_palloc_small(ngx_pool_t *pool, size_t size, |
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13 ngx_uint_t align); |
2049 | 14 static void *ngx_palloc_block(ngx_pool_t *pool, size_t size); |
15 static void *ngx_palloc_large(ngx_pool_t *pool, size_t size); | |
16 | |
17 | |
501 | 18 ngx_pool_t * |
19 ngx_create_pool(size_t size, ngx_log_t *log) | |
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20 { |
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21 ngx_pool_t *p; |
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22 |
3388 | 23 p = ngx_memalign(NGX_POOL_ALIGNMENT, size, log); |
501 | 24 if (p == NULL) { |
527 | 25 return NULL; |
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26 } |
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27 |
2049 | 28 p->d.last = (u_char *) p + sizeof(ngx_pool_t); |
29 p->d.end = (u_char *) p + size; | |
30 p->d.next = NULL; | |
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31 p->d.failed = 0; |
2049 | 32 |
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33 size = size - sizeof(ngx_pool_t); |
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34 p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL; |
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35 |
581 | 36 p->current = p; |
37 p->chain = NULL; | |
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38 p->large = NULL; |
509 | 39 p->cleanup = NULL; |
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40 p->log = log; |
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41 |
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42 return p; |
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43 } |
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44 |
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45 |
501 | 46 void |
47 ngx_destroy_pool(ngx_pool_t *pool) | |
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48 { |
509 | 49 ngx_pool_t *p, *n; |
50 ngx_pool_large_t *l; | |
51 ngx_pool_cleanup_t *c; | |
52 | |
53 for (c = pool->cleanup; c; c = c->next) { | |
54 if (c->handler) { | |
1744 | 55 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
56 "run cleanup: %p", c); | |
509 | 57 c->handler(c->data); |
58 } | |
59 } | |
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61 #if (NGX_DEBUG) |
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62 |
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63 /* |
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64 * we could allocate the pool->log from this pool |
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65 * so we cannot use this log while free()ing the pool |
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66 */ |
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67 |
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68 for (l = pool->large; l; l = l->next) { |
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69 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, "free: %p", l->alloc); |
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70 } |
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71 |
2049 | 72 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
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73 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
2049 | 74 "free: %p, unused: %uz", p, p->d.end - p->d.last); |
133
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75 |
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76 if (n == NULL) { |
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77 break; |
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78 } |
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79 } |
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81 #endif |
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82 |
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83 for (l = pool->large; l; l = l->next) { |
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84 if (l->alloc) { |
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85 ngx_free(l->alloc); |
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86 } |
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87 } |
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88 |
2049 | 89 for (p = pool, n = pool->d.next; /* void */; p = n, n = n->d.next) { |
477 | 90 ngx_free(p); |
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91 |
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92 if (n == NULL) { |
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93 break; |
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94 } |
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95 } |
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96 } |
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98 |
2337 | 99 void |
100 ngx_reset_pool(ngx_pool_t *pool) | |
101 { | |
102 ngx_pool_t *p; | |
103 ngx_pool_large_t *l; | |
104 | |
105 for (l = pool->large; l; l = l->next) { | |
106 if (l->alloc) { | |
107 ngx_free(l->alloc); | |
108 } | |
109 } | |
110 | |
111 for (p = pool; p; p = p->d.next) { | |
112 p->d.last = (u_char *) p + sizeof(ngx_pool_t); | |
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113 p->d.failed = 0; |
2337 | 114 } |
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115 |
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116 pool->current = pool; |
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117 pool->chain = NULL; |
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118 pool->large = NULL; |
2337 | 119 } |
120 | |
121 | |
501 | 122 void * |
123 ngx_palloc(ngx_pool_t *pool, size_t size) | |
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124 { |
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125 #if !(NGX_DEBUG_PALLOC) |
2049 | 126 if (size <= pool->max) { |
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127 return ngx_palloc_small(pool, size, 1); |
2049 | 128 } |
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129 #endif |
2049 | 130 |
131 return ngx_palloc_large(pool, size); | |
132 } | |
133 | |
134 | |
135 void * | |
136 ngx_pnalloc(ngx_pool_t *pool, size_t size) | |
137 { | |
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138 #if !(NGX_DEBUG_PALLOC) |
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139 if (size <= pool->max) { |
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140 return ngx_palloc_small(pool, size, 0); |
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141 } |
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142 #endif |
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143 |
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144 return ngx_palloc_large(pool, size); |
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145 } |
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146 |
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147 |
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148 static ngx_inline void * |
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149 ngx_palloc_small(ngx_pool_t *pool, size_t size, ngx_uint_t align) |
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150 { |
2049 | 151 u_char *m; |
152 ngx_pool_t *p; | |
153 | |
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154 p = pool->current; |
2049 | 155 |
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156 do { |
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157 m = p->d.last; |
2049 | 158 |
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159 if (align) { |
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160 m = ngx_align_ptr(m, NGX_ALIGNMENT); |
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161 } |
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162 |
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163 if ((size_t) (p->d.end - m) >= size) { |
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164 p->d.last = m + size; |
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165 |
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166 return m; |
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167 } |
2049 | 168 |
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169 p = p->d.next; |
2049 | 170 |
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171 } while (p); |
2049 | 172 |
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173 return ngx_palloc_block(pool, size); |
2049 | 174 } |
175 | |
581 | 176 |
2049 | 177 static void * |
178 ngx_palloc_block(ngx_pool_t *pool, size_t size) | |
179 { | |
180 u_char *m; | |
2055 | 181 size_t psize; |
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182 ngx_pool_t *p, *new; |
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183 |
2055 | 184 psize = (size_t) (pool->d.end - (u_char *) pool); |
185 | |
3388 | 186 m = ngx_memalign(NGX_POOL_ALIGNMENT, psize, pool->log); |
2056 | 187 if (m == NULL) { |
2049 | 188 return NULL; |
189 } | |
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190 |
2056 | 191 new = (ngx_pool_t *) m; |
192 | |
193 new->d.end = m + psize; | |
2055 | 194 new->d.next = NULL; |
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195 new->d.failed = 0; |
2055 | 196 |
2056 | 197 m += sizeof(ngx_pool_data_t); |
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198 m = ngx_align_ptr(m, NGX_ALIGNMENT); |
2056 | 199 new->d.last = m + size; |
200 | |
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201 for (p = pool->current; p->d.next; p = p->d.next) { |
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202 if (p->d.failed++ > 4) { |
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203 pool->current = p->d.next; |
194
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204 } |
2049 | 205 } |
194
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206 |
2049 | 207 p->d.next = new; |
208 | |
209 return m; | |
210 } | |
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211 |
2049 | 212 |
213 static void * | |
214 ngx_palloc_large(ngx_pool_t *pool, size_t size) | |
215 { | |
216 void *p; | |
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217 ngx_uint_t n; |
2049 | 218 ngx_pool_large_t *large; |
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219 |
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220 p = ngx_alloc(size, pool->log); |
501 | 221 if (p == NULL) { |
347
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222 return NULL; |
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223 } |
2129 | 224 |
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225 n = 0; |
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226 |
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227 for (large = pool->large; large; large = large->next) { |
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228 if (large->alloc == NULL) { |
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229 large->alloc = p; |
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230 return p; |
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231 } |
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232 |
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233 if (n++ > 3) { |
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234 break; |
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235 } |
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236 } |
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237 |
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238 large = ngx_palloc_small(pool, sizeof(ngx_pool_large_t), 1); |
2129 | 239 if (large == NULL) { |
240 ngx_free(p); | |
241 return NULL; | |
242 } | |
243 | |
244 large->alloc = p; | |
245 large->next = pool->large; | |
246 pool->large = large; | |
247 | |
248 return p; | |
249 } | |
250 | |
251 | |
252 void * | |
253 ngx_pmemalign(ngx_pool_t *pool, size_t size, size_t alignment) | |
254 { | |
255 void *p; | |
256 ngx_pool_large_t *large; | |
257 | |
258 p = ngx_memalign(alignment, size, pool->log); | |
259 if (p == NULL) { | |
260 return NULL; | |
261 } | |
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262 |
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263 large = ngx_palloc_small(pool, sizeof(ngx_pool_large_t), 1); |
629 | 264 if (large == NULL) { |
1317 | 265 ngx_free(p); |
629 | 266 return NULL; |
156
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267 } |
0
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268 |
156
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269 large->alloc = p; |
629 | 270 large->next = pool->large; |
271 pool->large = large; | |
156
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272 |
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273 return p; |
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274 } |
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275 |
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276 |
501 | 277 ngx_int_t |
278 ngx_pfree(ngx_pool_t *pool, void *p) | |
156
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279 { |
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280 ngx_pool_large_t *l; |
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281 |
156
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282 for (l = pool->large; l; l = l->next) { |
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283 if (p == l->alloc) { |
257
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284 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, pool->log, 0, |
461 | 285 "free: %p", l->alloc); |
477 | 286 ngx_free(l->alloc); |
156
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287 l->alloc = NULL; |
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288 |
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289 return NGX_OK; |
156
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290 } |
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291 } |
436
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292 |
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293 return NGX_DECLINED; |
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294 } |
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295 |
156
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296 |
501 | 297 void * |
298 ngx_pcalloc(ngx_pool_t *pool, size_t size) | |
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299 { |
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300 void *p; |
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301 |
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302 p = ngx_palloc(pool, size); |
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303 if (p) { |
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304 ngx_memzero(p, size); |
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305 } |
0
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306 |
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307 return p; |
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308 } |
346
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309 |
509 | 310 |
311 ngx_pool_cleanup_t * | |
563 | 312 ngx_pool_cleanup_add(ngx_pool_t *p, size_t size) |
509 | 313 { |
314 ngx_pool_cleanup_t *c; | |
315 | |
316 c = ngx_palloc(p, sizeof(ngx_pool_cleanup_t)); | |
317 if (c == NULL) { | |
318 return NULL; | |
319 } | |
320 | |
563 | 321 if (size) { |
322 c->data = ngx_palloc(p, size); | |
323 if (c->data == NULL) { | |
324 return NULL; | |
325 } | |
326 | |
327 } else { | |
328 c->data = NULL; | |
329 } | |
330 | |
331 c->handler = NULL; | |
509 | 332 c->next = p->cleanup; |
333 | |
334 p->cleanup = c; | |
335 | |
563 | 336 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, p->log, 0, "add cleanup: %p", c); |
337 | |
509 | 338 return c; |
339 } | |
340 | |
341 | |
342 void | |
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343 ngx_pool_run_cleanup_file(ngx_pool_t *p, ngx_fd_t fd) |
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344 { |
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345 ngx_pool_cleanup_t *c; |
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346 ngx_pool_cleanup_file_t *cf; |
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347 |
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348 for (c = p->cleanup; c; c = c->next) { |
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349 if (c->handler == ngx_pool_cleanup_file) { |
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350 |
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351 cf = c->data; |
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352 |
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353 if (cf->fd == fd) { |
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354 c->handler(cf); |
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355 c->handler = NULL; |
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356 return; |
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357 } |
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358 } |
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359 } |
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360 } |
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361 |
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362 |
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363 void |
509 | 364 ngx_pool_cleanup_file(void *data) |
365 { | |
366 ngx_pool_cleanup_file_t *c = data; | |
367 | |
1744 | 368 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d", |
369 c->fd); | |
563 | 370 |
509 | 371 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
372 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, | |
373 ngx_close_file_n " \"%s\" failed", c->name); | |
374 } | |
375 } | |
376 | |
377 | |
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378 void |
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379 ngx_pool_delete_file(void *data) |
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380 { |
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381 ngx_pool_cleanup_file_t *c = data; |
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382 |
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383 ngx_err_t err; |
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384 |
1744 | 385 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, c->log, 0, "file cleanup: fd:%d %s", |
386 c->fd, c->name); | |
1075
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387 |
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388 if (ngx_delete_file(c->name) == NGX_FILE_ERROR) { |
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389 err = ngx_errno; |
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390 |
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391 if (err != NGX_ENOENT) { |
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392 ngx_log_error(NGX_LOG_CRIT, c->log, err, |
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393 ngx_delete_file_n " \"%s\" failed", c->name); |
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394 } |
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395 } |
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396 |
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397 if (ngx_close_file(c->fd) == NGX_FILE_ERROR) { |
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398 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
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399 ngx_close_file_n " \"%s\" failed", c->name); |
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400 } |
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401 } |
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402 |
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403 |
346
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404 #if 0 |
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405 |
501 | 406 static void * |
407 ngx_get_cached_block(size_t size) | |
346
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408 { |
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409 void *p; |
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410 ngx_cached_block_slot_t *slot; |
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411 |
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412 if (ngx_cycle->cache == NULL) { |
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413 return NULL; |
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414 } |
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415 |
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416 slot = &ngx_cycle->cache[(size + ngx_pagesize - 1) / ngx_pagesize]; |
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417 |
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418 slot->tries++; |
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419 |
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420 if (slot->number) { |
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421 p = slot->block; |
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422 slot->block = slot->block->next; |
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423 slot->number--; |
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424 return p; |
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425 } |
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426 |
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427 return NULL; |
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428 } |
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429 |
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430 #endif |