Mercurial > hg > nginx
annotate src/core/ngx_regex.c @ 5264:b6ffe53f9c3d
Core: fixed possible use of an uninitialized variable.
The call to ngx_sock_ntop() in ngx_connection_local_sockaddr() might be
performed with the uninitialized "len" variable. The fix is to initialize
variable to the size of corresponding socket address type.
The issue was introduced in commit 05ba5bce31e0.
author | Vladimir Homutov <vl@nginx.com> |
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date | Thu, 11 Jul 2013 19:50:19 +0400 |
parents | 6e1a48bcf915 |
children | e7f6991eca47 |
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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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, | |
290
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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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150 rc->regex = ngx_pcalloc(rc->pool, sizeof(ngx_regex_t)); |
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151 if (rc->regex == NULL) { |
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152 return NGX_ERROR; |
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153 } |
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154 |
4638
6e1a48bcf915
Fixed the ngx_regex.h header file compatibility with C++.
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155 rc->regex->code = re; |
4388
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156 |
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157 /* do not study at runtime */ |
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158 |
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159 if (ngx_pcre_studies != NULL) { |
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160 elt = ngx_list_push(ngx_pcre_studies); |
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161 if (elt == NULL) { |
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162 return NGX_ERROR; |
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163 } |
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164 |
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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
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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
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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
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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; | |
207 return NGX_OK; | |
195
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208 } |
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209 |
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210 |
503 | 211 ngx_int_t |
1784 | 212 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log) |
213 { | |
214 ngx_int_t n; | |
215 ngx_uint_t i; | |
216 ngx_regex_elt_t *re; | |
217 | |
218 re = a->elts; | |
219 | |
220 for (i = 0; i < a->nelts; i++) { | |
221 | |
222 n = ngx_regex_exec(re[i].regex, s, NULL, 0); | |
223 | |
224 if (n == NGX_REGEX_NO_MATCHED) { | |
225 continue; | |
226 } | |
227 | |
228 if (n < 0) { | |
229 ngx_log_error(NGX_LOG_ALERT, log, 0, | |
3325 | 230 ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"", |
1784 | 231 n, s, re[i].name); |
232 return NGX_ERROR; | |
233 } | |
234 | |
235 /* match */ | |
236 | |
237 return NGX_OK; | |
238 } | |
239 | |
240 return NGX_DECLINED; | |
241 } | |
242 | |
243 | |
503 | 244 static void * ngx_libc_cdecl |
245 ngx_regex_malloc(size_t size) | |
195
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246 { |
381
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247 ngx_pool_t *pool; |
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248 #if (NGX_THREADS) |
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249 ngx_core_tls_t *tls; |
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250 |
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251 if (ngx_threaded) { |
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252 tls = ngx_thread_get_tls(ngx_core_tls_key); |
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253 pool = tls->pool; |
3325 | 254 |
381
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255 } else { |
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256 pool = ngx_pcre_pool; |
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257 } |
3325 | 258 |
381
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259 #else |
3325 | 260 |
381
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261 pool = ngx_pcre_pool; |
3325 | 262 |
381
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263 #endif |
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diff
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264 |
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diff
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|
265 if (pool) { |
2049 | 266 return ngx_palloc(pool, size); |
294
5cfd65b8b0a7
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267 } |
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268 |
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269 return NULL; |
195
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270 } |
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271 |
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272 |
503 | 273 static void ngx_libc_cdecl |
274 ngx_regex_free(void *p) | |
195
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275 { |
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276 return; |
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277 } |
4388
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278 |
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Added support for regex study and PCRE JIT (ticket #41) optimizations on
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279 |
4423
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Fixed memory leak on HUP signal when PCRE JIT was used.
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|
280 #if (NGX_HAVE_PCRE_JIT) |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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281 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
282 static void |
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Fixed memory leak on HUP signal when PCRE JIT was used.
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283 ngx_pcre_free_studies(void *data) |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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284 { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
285 ngx_list_t *studies = data; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
286 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
287 ngx_uint_t i; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
288 ngx_list_part_t *part; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
289 ngx_regex_elt_t *elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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290 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
291 part = &studies->part; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
292 elts = part->elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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293 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
294 for (i = 0 ; /* void */ ; i++) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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295 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
296 if (i >= part->nelts) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
297 if (part->next == NULL) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
298 break; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
299 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
300 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
301 part = part->next; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
302 elts = part->elts; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
303 i = 0; |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
304 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
305 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
306 if (elts[i].regex->extra != NULL) { |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
changeset
|
307 pcre_free_study(elts[i].regex->extra); |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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diff
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|
308 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
309 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
310 } |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
311 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
312 #endif |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
313 |
196c3dacff0d
Fixed memory leak on HUP signal when PCRE JIT was used.
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|
314 |
4388
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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changeset
|
315 static ngx_int_t |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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changeset
|
316 ngx_regex_module_init(ngx_cycle_t *cycle) |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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|
317 { |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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changeset
|
318 int opt; |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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4326
diff
changeset
|
319 const char *errstr; |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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4326
diff
changeset
|
320 ngx_uint_t i; |
005fc2d5e84f
Added support for regex study and PCRE JIT (ticket #41) optimizations on
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4326
diff
changeset
|
321 ngx_list_part_t *part; |
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322 ngx_regex_elt_t *elts; |
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323 |
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324 opt = 0; |
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325 |
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326 #if (NGX_HAVE_PCRE_JIT) |
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327 { |
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328 ngx_regex_conf_t *rcf; |
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329 ngx_pool_cleanup_t *cln; |
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330 |
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331 rcf = (ngx_regex_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_regex_module); |
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332 |
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333 if (rcf->pcre_jit) { |
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334 opt = PCRE_STUDY_JIT_COMPILE; |
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335 |
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336 /* |
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337 * The PCRE JIT compiler uses mmap for its executable codes, so we |
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338 * have to explicitly call the pcre_free_study() function to free |
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339 * this memory. |
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340 */ |
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341 |
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342 cln = ngx_pool_cleanup_add(cycle->pool, 0); |
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343 if (cln == NULL) { |
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344 return NGX_ERROR; |
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345 } |
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346 |
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347 cln->handler = ngx_pcre_free_studies; |
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348 cln->data = ngx_pcre_studies; |
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349 } |
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350 } |
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351 #endif |
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352 |
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353 ngx_regex_malloc_init(cycle->pool); |
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354 |
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355 part = &ngx_pcre_studies->part; |
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356 elts = part->elts; |
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357 |
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358 for (i = 0 ; /* void */ ; i++) { |
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359 |
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360 if (i >= part->nelts) { |
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361 if (part->next == NULL) { |
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362 break; |
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363 } |
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364 |
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365 part = part->next; |
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366 elts = part->elts; |
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367 i = 0; |
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368 } |
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369 |
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370 elts[i].regex->extra = pcre_study(elts[i].regex->code, opt, &errstr); |
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371 |
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372 if (errstr != NULL) { |
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373 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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374 "pcre_study() failed: %s in \"%s\"", |
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375 errstr, elts[i].name); |
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376 } |
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377 |
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378 #if (NGX_HAVE_PCRE_JIT) |
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379 if (opt & PCRE_STUDY_JIT_COMPILE) { |
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380 int jit, n; |
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381 |
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382 jit = 0; |
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383 n = pcre_fullinfo(elts[i].regex->code, elts[i].regex->extra, |
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384 PCRE_INFO_JIT, &jit); |
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385 |
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386 if (n != 0 || jit != 1) { |
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387 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, |
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388 "JIT compiler does not support pattern: \"%s\"", |
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389 elts[i].name); |
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390 } |
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391 } |
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392 #endif |
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393 } |
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394 |
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395 ngx_regex_malloc_done(); |
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396 |
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397 ngx_pcre_studies = NULL; |
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398 |
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399 return NGX_OK; |
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400 } |
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401 |
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402 |
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403 static void * |
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404 ngx_regex_create_conf(ngx_cycle_t *cycle) |
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405 { |
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406 ngx_regex_conf_t *rcf; |
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407 |
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408 rcf = ngx_pcalloc(cycle->pool, sizeof(ngx_regex_conf_t)); |
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409 if (rcf == NULL) { |
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410 return NULL; |
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411 } |
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412 |
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413 rcf->pcre_jit = NGX_CONF_UNSET; |
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414 |
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415 ngx_pcre_studies = ngx_list_create(cycle->pool, 8, sizeof(ngx_regex_elt_t)); |
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416 if (ngx_pcre_studies == NULL) { |
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417 return NULL; |
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418 } |
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419 |
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420 return rcf; |
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421 } |
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422 |
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423 |
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424 static char * |
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425 ngx_regex_init_conf(ngx_cycle_t *cycle, void *conf) |
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426 { |
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427 ngx_regex_conf_t *rcf = conf; |
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428 |
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429 ngx_conf_init_value(rcf->pcre_jit, 0); |
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430 |
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431 return NGX_CONF_OK; |
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432 } |
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433 |
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434 |
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435 static char * |
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436 ngx_regex_pcre_jit(ngx_conf_t *cf, void *post, void *data) |
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437 { |
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438 ngx_flag_t *fp = data; |
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439 |
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440 if (*fp == 0) { |
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441 return NGX_CONF_OK; |
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442 } |
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443 |
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444 #if (NGX_HAVE_PCRE_JIT) |
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445 { |
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446 int jit, r; |
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447 |
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448 jit = 0; |
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449 r = pcre_config(PCRE_CONFIG_JIT, &jit); |
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450 |
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451 if (r != 0 || jit != 1) { |
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452 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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453 "PCRE library does not support JIT"); |
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454 *fp = 0; |
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455 } |
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456 } |
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457 #else |
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458 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
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459 "nginx was built without PCRE JIT support"); |
4388
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460 *fp = 0; |
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461 #endif |
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462 |
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463 return NGX_CONF_OK; |
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464 } |