Mercurial > hg > nginx-quic
annotate src/core/ngx_regex.c @ 5905:2f7e557eab5b
Cache: proxy_cache_lock_age and friends.
Once this age is reached, the cache lock is discarded and another
request can acquire the lock. Requests which failed to acquire
the lock are not allowed to cache the response.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Tue, 18 Nov 2014 20:41:12 +0300 |
parents | e7f6991eca47 |
children | 457ec43dd8d5 |
rev | line source |
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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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12 typedef struct { |
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13 ngx_flag_t pcre_jit; |
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14 } ngx_regex_conf_t; |
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15 |
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16 |
503 | 17 static void * ngx_libc_cdecl ngx_regex_malloc(size_t size); |
18 static void ngx_libc_cdecl ngx_regex_free(void *p); | |
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19 #if (NGX_HAVE_PCRE_JIT) |
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20 static void ngx_pcre_free_studies(void *data); |
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21 #endif |
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23 static ngx_int_t ngx_regex_module_init(ngx_cycle_t *cycle); |
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24 |
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25 static void *ngx_regex_create_conf(ngx_cycle_t *cycle); |
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26 static char *ngx_regex_init_conf(ngx_cycle_t *cycle, void *conf); |
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27 |
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28 static char *ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data); |
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29 static ngx_conf_post_t ngx_regex_pcre_jit_post = { ngx_regex_pcre_jit }; |
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30 |
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31 |
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32 static ngx_command_t ngx_regex_commands[] = { |
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33 |
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34 { ngx_string("pcre_jit"), |
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35 NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1, |
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36 ngx_conf_set_flag_slot, |
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37 0, |
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38 offsetof(ngx_regex_conf_t, pcre_jit), |
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39 &ngx_regex_pcre_jit_post }, |
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40 |
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41 ngx_null_command |
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42 }; |
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43 |
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44 |
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45 static ngx_core_module_t ngx_regex_module_ctx = { |
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46 ngx_string("regex"), |
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47 ngx_regex_create_conf, |
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48 ngx_regex_init_conf |
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49 }; |
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50 |
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51 |
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52 ngx_module_t ngx_regex_module = { |
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53 NGX_MODULE_V1, |
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54 &ngx_regex_module_ctx, /* module context */ |
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55 ngx_regex_commands, /* module directives */ |
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56 NGX_CORE_MODULE, /* module type */ |
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57 NULL, /* init master */ |
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58 ngx_regex_module_init, /* init module */ |
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59 NULL, /* init process */ |
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60 NULL, /* init thread */ |
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61 NULL, /* exit thread */ |
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62 NULL, /* exit process */ |
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63 NULL, /* exit master */ |
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64 NGX_MODULE_V1_PADDING |
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65 }; |
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66 |
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67 |
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68 static ngx_pool_t *ngx_pcre_pool; |
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69 static ngx_list_t *ngx_pcre_studies; |
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70 |
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71 |
503 | 72 void |
73 ngx_regex_init(void) | |
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74 { |
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75 pcre_malloc = ngx_regex_malloc; |
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76 pcre_free = ngx_regex_free; |
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77 } |
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78 |
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79 |
3325 | 80 static ngx_inline void |
81 ngx_regex_malloc_init(ngx_pool_t *pool) | |
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82 { |
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83 #if (NGX_THREADS) |
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84 ngx_core_tls_t *tls; |
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85 |
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86 if (ngx_threaded) { |
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87 tls = ngx_thread_get_tls(ngx_core_tls_key); |
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88 tls->pool = pool; |
3325 | 89 return; |
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90 } |
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91 |
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92 #endif |
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93 |
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94 ngx_pcre_pool = pool; |
3325 | 95 } |
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96 |
3325 | 97 |
98 static ngx_inline void | |
99 ngx_regex_malloc_done(void) | |
100 { | |
101 #if (NGX_THREADS) | |
102 ngx_core_tls_t *tls; | |
103 | |
104 if (ngx_threaded) { | |
105 tls = ngx_thread_get_tls(ngx_core_tls_key); | |
106 tls->pool = NULL; | |
107 return; | |
108 } | |
109 | |
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110 #endif |
3325 | 111 |
112 ngx_pcre_pool = NULL; | |
113 } | |
114 | |
115 | |
116 ngx_int_t | |
117 ngx_regex_compile(ngx_regex_compile_t *rc) | |
118 { | |
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119 int n, erroff; |
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120 char *p; |
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121 pcre *re; |
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122 const char *errstr; |
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123 ngx_regex_elt_t *elt; |
3325 | 124 |
125 ngx_regex_malloc_init(rc->pool); | |
126 | |
127 re = pcre_compile((const char *) rc->pattern.data, (int) rc->options, | |
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128 &errstr, &erroff, NULL); |
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129 |
3325 | 130 /* ensure that there is no current pool */ |
131 ngx_regex_malloc_done(); | |
132 | |
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133 if (re == NULL) { |
3325 | 134 if ((size_t) erroff == rc->pattern.len) { |
135 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, | |
136 "pcre_compile() failed: %s in \"%V\"", | |
137 errstr, &rc->pattern) | |
138 - rc->err.data; | |
139 | |
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140 } else { |
3325 | 141 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, |
142 "pcre_compile() failed: %s in \"%V\" at \"%s\"", | |
143 errstr, &rc->pattern, rc->pattern.data + erroff) | |
144 - rc->err.data; | |
195
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145 } |
3325 | 146 |
147 return NGX_ERROR; | |
148 } | |
149 | |
4388
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Added support for regex study and PCRE JIT (ticket #41) optimizations on
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150 rc->regex = ngx_pcalloc(rc->pool, sizeof(ngx_regex_t)); |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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151 if (rc->regex == NULL) { |
5824
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Core: ngx_regex_compile() error handling fixes.
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152 goto nomem; |
4388
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Added support for regex study and PCRE JIT (ticket #41) optimizations on
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153 } |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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154 |
4638
6e1a48bcf915
Fixed the ngx_regex.h header file compatibility with C++.
Valentin Bartenev <vbart@nginx.com>
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4423
diff
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|
155 rc->regex->code = re; |
4388
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Added support for regex study and PCRE JIT (ticket #41) optimizations on
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156 |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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157 /* do not study at runtime */ |
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158 |
005fc2d5e84f
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159 if (ngx_pcre_studies != NULL) { |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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160 elt = ngx_list_push(ngx_pcre_studies); |
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161 if (elt == NULL) { |
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Core: ngx_regex_compile() error handling fixes.
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162 goto nomem; |
4388
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163 } |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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164 |
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Added support for regex study and PCRE JIT (ticket #41) optimizations on
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165 elt->regex = rc->regex; |
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166 elt->name = rc->pattern.data; |
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|
167 } |
3325 | 168 |
169 n = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &rc->captures); | |
170 if (n < 0) { | |
171 p = "pcre_fullinfo(\"%V\", PCRE_INFO_CAPTURECOUNT) failed: %d"; | |
172 goto failed; | |
173 } | |
174 | |
175 if (rc->captures == 0) { | |
176 return NGX_OK; | |
195
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177 } |
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178 |
3325 | 179 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMECOUNT, &rc->named_captures); |
180 if (n < 0) { | |
181 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMECOUNT) failed: %d"; | |
182 goto failed; | |
183 } | |
184 | |
185 if (rc->named_captures == 0) { | |
186 return NGX_OK; | |
187 } | |
294
5cfd65b8b0a7
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290
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188 |
3325 | 189 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &rc->name_size); |
190 if (n < 0) { | |
191 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMEENTRYSIZE) failed: %d"; | |
192 goto failed; | |
381
02a511569afb
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193 } |
3325 | 194 |
195 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMETABLE, &rc->names); | |
196 if (n < 0) { | |
197 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMETABLE) failed: %d"; | |
198 goto failed; | |
199 } | |
294
5cfd65b8b0a7
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200 |
3325 | 201 return NGX_OK; |
202 | |
203 failed: | |
204 | |
205 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n) | |
206 - rc->err.data; | |
5824
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Core: ngx_regex_compile() error handling fixes.
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207 return NGX_ERROR; |
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Core: ngx_regex_compile() error handling fixes.
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208 |
e7f6991eca47
Core: ngx_regex_compile() error handling fixes.
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209 nomem: |
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Core: ngx_regex_compile() error handling fixes.
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210 |
e7f6991eca47
Core: ngx_regex_compile() error handling fixes.
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211 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, |
e7f6991eca47
Core: ngx_regex_compile() error handling fixes.
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212 "regex \"%V\" compilation failed: no memory", |
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Core: ngx_regex_compile() error handling fixes.
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213 &rc->pattern) |
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Core: ngx_regex_compile() error handling fixes.
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214 - rc->err.data; |
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Core: ngx_regex_compile() error handling fixes.
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215 return NGX_ERROR; |
195
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216 } |
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217 |
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218 |
503 | 219 ngx_int_t |
1784 | 220 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log) |
221 { | |
222 ngx_int_t n; | |
223 ngx_uint_t i; | |
224 ngx_regex_elt_t *re; | |
225 | |
226 re = a->elts; | |
227 | |
228 for (i = 0; i < a->nelts; i++) { | |
229 | |
230 n = ngx_regex_exec(re[i].regex, s, NULL, 0); | |
231 | |
232 if (n == NGX_REGEX_NO_MATCHED) { | |
233 continue; | |
234 } | |
235 | |
236 if (n < 0) { | |
237 ngx_log_error(NGX_LOG_ALERT, log, 0, | |
3325 | 238 ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"", |
1784 | 239 n, s, re[i].name); |
240 return NGX_ERROR; | |
241 } | |
242 | |
243 /* match */ | |
244 | |
245 return NGX_OK; | |
246 } | |
247 | |
248 return NGX_DECLINED; | |
249 } | |
250 | |
251 | |
503 | 252 static void * ngx_libc_cdecl |
253 ngx_regex_malloc(size_t size) | |
195
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254 { |
381
02a511569afb
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294
diff
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|
255 ngx_pool_t *pool; |
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294
diff
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256 #if (NGX_THREADS) |
02a511569afb
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diff
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|
257 ngx_core_tls_t *tls; |
02a511569afb
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294
diff
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|
258 |
02a511569afb
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294
diff
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|
259 if (ngx_threaded) { |
02a511569afb
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294
diff
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|
260 tls = ngx_thread_get_tls(ngx_core_tls_key); |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
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294
diff
changeset
|
261 pool = tls->pool; |
3325 | 262 |
381
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
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294
diff
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|
263 } else { |
02a511569afb
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294
diff
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|
264 pool = ngx_pcre_pool; |
02a511569afb
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294
diff
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|
265 } |
3325 | 266 |
381
02a511569afb
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294
diff
changeset
|
267 #else |
3325 | 268 |
381
02a511569afb
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294
diff
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|
269 pool = ngx_pcre_pool; |
3325 | 270 |
381
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
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294
diff
changeset
|
271 #endif |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
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294
diff
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|
272 |
02a511569afb
nginx-0.0.7-2004-07-07-19:01:00 import
Igor Sysoev <igor@sysoev.ru>
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294
diff
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|
273 if (pool) { |
2049 | 274 return ngx_palloc(pool, size); |
294
5cfd65b8b0a7
nginx-0.0.3-2004-03-23-09:01:52 import
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290
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|
275 } |
5cfd65b8b0a7
nginx-0.0.3-2004-03-23-09:01:52 import
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290
diff
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|
276 |
5cfd65b8b0a7
nginx-0.0.3-2004-03-23-09:01:52 import
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|
277 return NULL; |
195
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|
278 } |
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|
279 |
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|
280 |
503 | 281 static void ngx_libc_cdecl |
282 ngx_regex_free(void *p) | |
195
8dee38ea9117
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|
283 { |
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|
284 return; |
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|
285 } |
4388
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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diff
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|
286 |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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diff
changeset
|
287 |
4423
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
Valentin Bartenev <vbart@nginx.com>
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4413
diff
changeset
|
288 #if (NGX_HAVE_PCRE_JIT) |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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changeset
|
289 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
290 static void |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
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|
291 ngx_pcre_free_studies(void *data) |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
292 { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
293 ngx_list_t *studies = data; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
294 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
295 ngx_uint_t i; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
296 ngx_list_part_t *part; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
297 ngx_regex_elt_t *elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
298 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
299 part = &studies->part; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
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|
300 elts = part->elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
301 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
302 for (i = 0 ; /* void */ ; i++) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
303 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
304 if (i >= part->nelts) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
305 if (part->next == NULL) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
306 break; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
307 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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parents:
4413
diff
changeset
|
308 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
309 part = part->next; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
310 elts = part->elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
311 i = 0; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
312 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
Valentin Bartenev <vbart@nginx.com>
parents:
4413
diff
changeset
|
313 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
Valentin Bartenev <vbart@nginx.com>
parents:
4413
diff
changeset
|
314 if (elts[i].regex->extra != NULL) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
315 pcre_free_study(elts[i].regex->extra); |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
316 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
317 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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parents:
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diff
changeset
|
318 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
319 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
320 #endif |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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4413
diff
changeset
|
321 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
322 |
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323 static ngx_int_t |
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324 ngx_regex_module_init(ngx_cycle_t *cycle) |
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325 { |
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326 int opt; |
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327 const char *errstr; |
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328 ngx_uint_t i; |
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329 ngx_list_part_t *part; |
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330 ngx_regex_elt_t *elts; |
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331 |
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332 opt = 0; |
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333 |
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334 #if (NGX_HAVE_PCRE_JIT) |
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335 { |
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336 ngx_regex_conf_t *rcf; |
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337 ngx_pool_cleanup_t *cln; |
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338 |
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339 rcf = (ngx_regex_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_regex_module); |
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340 |
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341 if (rcf->pcre_jit) { |
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342 opt = PCRE_STUDY_JIT_COMPILE; |
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343 |
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344 /* |
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345 * The PCRE JIT compiler uses mmap for its executable codes, so we |
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346 * have to explicitly call the pcre_free_study() function to free |
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347 * this memory. |
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348 */ |
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349 |
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350 cln = ngx_pool_cleanup_add(cycle->pool, 0); |
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351 if (cln == NULL) { |
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352 return NGX_ERROR; |
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353 } |
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354 |
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355 cln->handler = ngx_pcre_free_studies; |
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356 cln->data = ngx_pcre_studies; |
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357 } |
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358 } |
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359 #endif |
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360 |
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361 ngx_regex_malloc_init(cycle->pool); |
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362 |
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363 part = &ngx_pcre_studies->part; |
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364 elts = part->elts; |
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365 |
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366 for (i = 0 ; /* void */ ; i++) { |
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367 |
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368 if (i >= part->nelts) { |
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369 if (part->next == NULL) { |
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370 break; |
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371 } |
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372 |
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373 part = part->next; |
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374 elts = part->elts; |
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375 i = 0; |
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376 } |
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377 |
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378 elts[i].regex->extra = pcre_study(elts[i].regex->code, opt, &errstr); |
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379 |
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380 if (errstr != NULL) { |
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381 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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382 "pcre_study() failed: %s in \"%s\"", |
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383 errstr, elts[i].name); |
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384 } |
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385 |
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386 #if (NGX_HAVE_PCRE_JIT) |
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387 if (opt & PCRE_STUDY_JIT_COMPILE) { |
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388 int jit, n; |
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389 |
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390 jit = 0; |
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391 n = pcre_fullinfo(elts[i].regex->code, elts[i].regex->extra, |
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392 PCRE_INFO_JIT, &jit); |
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393 |
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394 if (n != 0 || jit != 1) { |
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395 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
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396 "JIT compiler does not support pattern: \"%s\"", |
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397 elts[i].name); |
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398 } |
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399 } |
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400 #endif |
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401 } |
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402 |
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403 ngx_regex_malloc_done(); |
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404 |
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405 ngx_pcre_studies = NULL; |
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406 |
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407 return NGX_OK; |
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408 } |
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409 |
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410 |
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411 static void * |
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412 ngx_regex_create_conf(ngx_cycle_t *cycle) |
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413 { |
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414 ngx_regex_conf_t *rcf; |
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415 |
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416 rcf = ngx_pcalloc(cycle->pool, sizeof(ngx_regex_conf_t)); |
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417 if (rcf == NULL) { |
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418 return NULL; |
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419 } |
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420 |
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421 rcf->pcre_jit = NGX_CONF_UNSET; |
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422 |
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423 ngx_pcre_studies = ngx_list_create(cycle->pool, 8, sizeof(ngx_regex_elt_t)); |
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424 if (ngx_pcre_studies == NULL) { |
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425 return NULL; |
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426 } |
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427 |
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428 return rcf; |
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429 } |
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430 |
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431 |
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432 static char * |
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433 ngx_regex_init_conf(ngx_cycle_t *cycle, void *conf) |
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434 { |
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435 ngx_regex_conf_t *rcf = conf; |
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436 |
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437 ngx_conf_init_value(rcf->pcre_jit, 0); |
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438 |
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439 return NGX_CONF_OK; |
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440 } |
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441 |
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442 |
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443 static char * |
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444 ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data) |
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445 { |
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446 ngx_flag_t *fp = data; |
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447 |
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448 if (*fp == 0) { |
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449 return NGX_CONF_OK; |
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450 } |
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451 |
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452 #if (NGX_HAVE_PCRE_JIT) |
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453 { |
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454 int jit, r; |
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455 |
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456 jit = 0; |
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457 r = pcre_config(PCRE_CONFIG_JIT, &jit); |
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458 |
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459 if (r != 0 || jit != 1) { |
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460 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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461 "PCRE library does not support JIT"); |
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462 *fp = 0; |
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463 } |
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464 } |
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465 #else |
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466 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
4413
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467 "nginx was built without PCRE JIT support"); |
4388
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468 *fp = 0; |
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469 #endif |
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470 |
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471 return NGX_CONF_OK; |
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472 } |