1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1998-2017 Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@zend.com> |
16 | Zeev Suraski <zeev@zend.com> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 #include "zend_extensions.h"
23
24 ZEND_API zend_llist zend_extensions;
25 ZEND_API uint32_t zend_extension_flags = 0;
26 static int last_resource_number;
27
zend_load_extension(const char * path)28 int zend_load_extension(const char *path)
29 {
30 #if ZEND_EXTENSIONS_SUPPORT
31 DL_HANDLE handle;
32 zend_extension *new_extension;
33 zend_extension_version_info *extension_version_info;
34
35 handle = DL_LOAD(path);
36 if (!handle) {
37 #ifndef ZEND_WIN32
38 fprintf(stderr, "Failed loading %s: %s\n", path, DL_ERROR());
39 #else
40 fprintf(stderr, "Failed loading %s\n", path);
41 /* See http://support.microsoft.com/kb/190351 */
42 fflush(stderr);
43 #endif
44 return FAILURE;
45 }
46
47 extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
48 if (!extension_version_info) {
49 extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
50 }
51 new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
52 if (!new_extension) {
53 new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
54 }
55 if (!extension_version_info || !new_extension) {
56 fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path);
57 /* See http://support.microsoft.com/kb/190351 */
58 #ifdef ZEND_WIN32
59 fflush(stderr);
60 #endif
61 DL_UNLOAD(handle);
62 return FAILURE;
63 }
64
65
66 /* allow extension to proclaim compatibility with any Zend version */
67 if (extension_version_info->zend_extension_api_no != ZEND_EXTENSION_API_NO &&(!new_extension->api_no_check || new_extension->api_no_check(ZEND_EXTENSION_API_NO) != SUCCESS)) {
68 if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) {
69 fprintf(stderr, "%s requires Zend Engine API version %d.\n"
70 "The Zend Engine API version %d which is installed, is outdated.\n\n",
71 new_extension->name,
72 extension_version_info->zend_extension_api_no,
73 ZEND_EXTENSION_API_NO);
74 /* See http://support.microsoft.com/kb/190351 */
75 #ifdef ZEND_WIN32
76 fflush(stderr);
77 #endif
78 DL_UNLOAD(handle);
79 return FAILURE;
80 } else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) {
81 fprintf(stderr, "%s requires Zend Engine API version %d.\n"
82 "The Zend Engine API version %d which is installed, is newer.\n"
83 "Contact %s at %s for a later version of %s.\n\n",
84 new_extension->name,
85 extension_version_info->zend_extension_api_no,
86 ZEND_EXTENSION_API_NO,
87 new_extension->author,
88 new_extension->URL,
89 new_extension->name);
90 /* See http://support.microsoft.com/kb/190351 */
91 #ifdef ZEND_WIN32
92 fflush(stderr);
93 #endif
94 DL_UNLOAD(handle);
95 return FAILURE;
96 }
97 } else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) &&
98 (!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
99 fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n",
100 new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
101 /* See http://support.microsoft.com/kb/190351 */
102 #ifdef ZEND_WIN32
103 fflush(stderr);
104 #endif
105 DL_UNLOAD(handle);
106 return FAILURE;
107 } else if (zend_get_extension(new_extension->name)) {
108 fprintf(stderr, "Cannot load %s - it was already loaded\n", new_extension->name);
109 /* See http://support.microsoft.com/kb/190351 */
110 #ifdef ZEND_WIN32
111 fflush(stderr);
112 #endif
113 DL_UNLOAD(handle);
114 return FAILURE;
115 } else if (zend_get_extension(new_extension->name)) {
116 fprintf(stderr, "Cannot load %s - extension already loaded\n", new_extension->name);
117 /* See http://support.microsoft.com/kb/190351 */
118 #ifdef PHP_WIN32
119 fflush(stderr);
120 #endif
121 DL_UNLOAD(handle);
122 return FAILURE;
123 }
124
125 return zend_register_extension(new_extension, handle);
126 #else
127 fprintf(stderr, "Extensions are not supported on this platform.\n");
128 /* See http://support.microsoft.com/kb/190351 */
129 #ifdef ZEND_WIN32
130 fflush(stderr);
131 #endif
132 return FAILURE;
133 #endif
134 }
135
136
zend_register_extension(zend_extension * new_extension,DL_HANDLE handle)137 int zend_register_extension(zend_extension *new_extension, DL_HANDLE handle)
138 {
139 #if ZEND_EXTENSIONS_SUPPORT
140 zend_extension extension;
141
142 extension = *new_extension;
143 extension.handle = handle;
144
145 zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);
146
147 zend_llist_add_element(&zend_extensions, &extension);
148
149 if (extension.op_array_ctor) {
150 zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_CTOR;
151 }
152 if (extension.op_array_dtor) {
153 zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_DTOR;
154 }
155 if (extension.op_array_handler) {
156 zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_HANDLER;
157 }
158 if (extension.op_array_persist_calc) {
159 zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC;
160 }
161 if (extension.op_array_persist) {
162 zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST;
163 }
164 /*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/
165 #endif
166
167 return SUCCESS;
168 }
169
170
zend_extension_shutdown(zend_extension * extension)171 static void zend_extension_shutdown(zend_extension *extension)
172 {
173 #if ZEND_EXTENSIONS_SUPPORT
174 if (extension->shutdown) {
175 extension->shutdown(extension);
176 }
177 #endif
178 }
179
zend_extension_startup(zend_extension * extension)180 static int zend_extension_startup(zend_extension *extension)
181 {
182 #if ZEND_EXTENSIONS_SUPPORT
183 if (extension->startup) {
184 if (extension->startup(extension)!=SUCCESS) {
185 return 1;
186 }
187 zend_append_version_info(extension);
188 }
189 #endif
190 return 0;
191 }
192
193
zend_startup_extensions_mechanism()194 int zend_startup_extensions_mechanism()
195 {
196 /* Startup extensions mechanism */
197 zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
198 last_resource_number = 0;
199 return SUCCESS;
200 }
201
202
zend_startup_extensions()203 int zend_startup_extensions()
204 {
205 zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup);
206 return SUCCESS;
207 }
208
209
zend_shutdown_extensions(void)210 void zend_shutdown_extensions(void)
211 {
212 zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown);
213 zend_llist_destroy(&zend_extensions);
214 }
215
216
zend_extension_dtor(zend_extension * extension)217 void zend_extension_dtor(zend_extension *extension)
218 {
219 #if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG
220 if (extension->handle && !getenv("ZEND_DONT_UNLOAD_MODULES")) {
221 DL_UNLOAD(extension->handle);
222 }
223 #endif
224 }
225
226
zend_extension_message_dispatcher(const zend_extension * extension,int num_args,va_list args)227 static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args)
228 {
229 int message;
230 void *arg;
231
232 if (!extension->message_handler || num_args!=2) {
233 return;
234 }
235 message = va_arg(args, int);
236 arg = va_arg(args, void *);
237 extension->message_handler(message, arg);
238 }
239
240
zend_extension_dispatch_message(int message,void * arg)241 ZEND_API void zend_extension_dispatch_message(int message, void *arg)
242 {
243 zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher, 2, message, arg);
244 }
245
246
zend_get_resource_handle(zend_extension * extension)247 ZEND_API int zend_get_resource_handle(zend_extension *extension)
248 {
249 if (last_resource_number<ZEND_MAX_RESERVED_RESOURCES) {
250 extension->resource_number = last_resource_number;
251 return last_resource_number++;
252 } else {
253 return -1;
254 }
255 }
256
257
zend_get_extension(const char * extension_name)258 ZEND_API zend_extension *zend_get_extension(const char *extension_name)
259 {
260 zend_llist_element *element;
261
262 for (element = zend_extensions.head; element; element = element->next) {
263 zend_extension *extension = (zend_extension *) element->data;
264
265 if (!strcmp(extension->name, extension_name)) {
266 return extension;
267 }
268 }
269 return NULL;
270 }
271
272 typedef struct _zend_extension_persist_data {
273 zend_op_array *op_array;
274 size_t size;
275 char *mem;
276 } zend_extension_persist_data;
277
zend_extension_op_array_persist_calc_handler(zend_extension * extension,zend_extension_persist_data * data)278 static void zend_extension_op_array_persist_calc_handler(zend_extension *extension, zend_extension_persist_data *data)
279 {
280 if (extension->op_array_persist_calc) {
281 data->size += extension->op_array_persist_calc(data->op_array);
282 }
283 }
284
zend_extension_op_array_persist_handler(zend_extension * extension,zend_extension_persist_data * data)285 static void zend_extension_op_array_persist_handler(zend_extension *extension, zend_extension_persist_data *data)
286 {
287 if (extension->op_array_persist) {
288 size_t size = extension->op_array_persist(data->op_array, data->mem);
289 if (size) {
290 data->mem = (void*)((char*)data->mem + size);
291 data->size += size;
292 }
293 }
294 }
295
zend_extensions_op_array_persist_calc(zend_op_array * op_array)296 ZEND_API size_t zend_extensions_op_array_persist_calc(zend_op_array *op_array)
297 {
298 if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC) {
299 zend_extension_persist_data data;
300
301 data.op_array = op_array;
302 data.size = 0;
303 data.mem = NULL;
304 zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_calc_handler, &data);
305 return data.size;
306 }
307 return 0;
308 }
309
zend_extensions_op_array_persist(zend_op_array * op_array,void * mem)310 ZEND_API size_t zend_extensions_op_array_persist(zend_op_array *op_array, void *mem)
311 {
312 if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST) {
313 zend_extension_persist_data data;
314
315 data.op_array = op_array;
316 data.size = 0;
317 data.mem = mem;
318 zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_handler, &data);
319 return data.size;
320 }
321 return 0;
322 }
323
324 /*
325 * Local variables:
326 * tab-width: 4
327 * c-basic-offset: 4
328 * indent-tabs-mode: t
329 * End:
330 */
331
