/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2016 Zend Technologies Ltd. (http://www.zend.com) | +----------------------------------------------------------------------+ | This source file is subject to version 2.00 of the Zend license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.zend.com/license/2_00.txt. | | If you did not receive a copy of the Zend license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@zend.com so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Authors: Andi Gutmans | | Zeev Suraski | +----------------------------------------------------------------------+ */ /* $Id$ */ #include "zend_extensions.h" ZEND_API zend_llist zend_extensions; ZEND_API uint32_t zend_extension_flags = 0; static int last_resource_number; int zend_load_extension(const char *path) { #if ZEND_EXTENSIONS_SUPPORT DL_HANDLE handle; zend_extension *new_extension; zend_extension_version_info *extension_version_info; handle = DL_LOAD(path); if (!handle) { #ifndef ZEND_WIN32 fprintf(stderr, "Failed loading %s: %s\n", path, DL_ERROR()); #else fprintf(stderr, "Failed loading %s\n", path); /* See http://support.microsoft.com/kb/190351 */ fflush(stderr); #endif return FAILURE; } extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info"); if (!extension_version_info) { extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info"); } new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry"); if (!new_extension) { new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry"); } if (!extension_version_info || !new_extension) { fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } /* allow extension to proclaim compatibility with any Zend version */ 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)) { if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) { fprintf(stderr, "%s requires Zend Engine API version %d.\n" "The Zend Engine API version %d which is installed, is outdated.\n\n", new_extension->name, extension_version_info->zend_extension_api_no, ZEND_EXTENSION_API_NO); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) { fprintf(stderr, "%s requires Zend Engine API version %d.\n" "The Zend Engine API version %d which is installed, is newer.\n" "Contact %s at %s for a later version of %s.\n\n", new_extension->name, extension_version_info->zend_extension_api_no, ZEND_EXTENSION_API_NO, new_extension->author, new_extension->URL, new_extension->name); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } } else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) && (!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) { fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n", new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } else if (zend_get_extension(new_extension->name)) { fprintf(stderr, "Cannot load %s - it was already loaded\n", new_extension->name); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } else if (zend_get_extension(new_extension->name)) { fprintf(stderr, "Cannot load %s - extension already loaded\n", new_extension->name); /* See http://support.microsoft.com/kb/190351 */ #ifdef PHP_WIN32 fflush(stderr); #endif DL_UNLOAD(handle); return FAILURE; } return zend_register_extension(new_extension, handle); #else fprintf(stderr, "Extensions are not supported on this platform.\n"); /* See http://support.microsoft.com/kb/190351 */ #ifdef ZEND_WIN32 fflush(stderr); #endif return FAILURE; #endif } int zend_register_extension(zend_extension *new_extension, DL_HANDLE handle) { #if ZEND_EXTENSIONS_SUPPORT zend_extension extension; extension = *new_extension; extension.handle = handle; zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension); zend_llist_add_element(&zend_extensions, &extension); if (extension.op_array_ctor) { zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_CTOR; } if (extension.op_array_dtor) { zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_DTOR; } if (extension.op_array_handler) { zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_HANDLER; } if (extension.op_array_persist_calc) { zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC; } if (extension.op_array_persist) { zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST; } /*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/ #endif return SUCCESS; } static void zend_extension_shutdown(zend_extension *extension) { #if ZEND_EXTENSIONS_SUPPORT if (extension->shutdown) { extension->shutdown(extension); } #endif } static int zend_extension_startup(zend_extension *extension) { #if ZEND_EXTENSIONS_SUPPORT if (extension->startup) { if (extension->startup(extension)!=SUCCESS) { return 1; } zend_append_version_info(extension); } #endif return 0; } int zend_startup_extensions_mechanism() { /* Startup extensions mechanism */ zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1); last_resource_number = 0; return SUCCESS; } int zend_startup_extensions() { zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup); return SUCCESS; } void zend_shutdown_extensions(void) { zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown); zend_llist_destroy(&zend_extensions); } void zend_extension_dtor(zend_extension *extension) { #if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG if (extension->handle && !getenv("ZEND_DONT_UNLOAD_MODULES")) { DL_UNLOAD(extension->handle); } #endif } static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args) { int message; void *arg; if (!extension->message_handler || num_args!=2) { return; } message = va_arg(args, int); arg = va_arg(args, void *); extension->message_handler(message, arg); } ZEND_API void zend_extension_dispatch_message(int message, void *arg) { zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher, 2, message, arg); } ZEND_API int zend_get_resource_handle(zend_extension *extension) { if (last_resource_numberresource_number = last_resource_number; return last_resource_number++; } else { return -1; } } ZEND_API zend_extension *zend_get_extension(const char *extension_name) { zend_llist_element *element; for (element = zend_extensions.head; element; element = element->next) { zend_extension *extension = (zend_extension *) element->data; if (!strcmp(extension->name, extension_name)) { return extension; } } return NULL; } typedef struct _zend_extension_persist_data { zend_op_array *op_array; size_t size; char *mem; } zend_extension_persist_data; static void zend_extension_op_array_persist_calc_handler(zend_extension *extension, zend_extension_persist_data *data) { if (extension->op_array_persist_calc) { data->size += extension->op_array_persist_calc(data->op_array); } } static void zend_extension_op_array_persist_handler(zend_extension *extension, zend_extension_persist_data *data) { if (extension->op_array_persist) { size_t size = extension->op_array_persist(data->op_array, data->mem); if (size) { data->mem = (void*)((char*)data->mem + size); data->size += size; } } } ZEND_API size_t zend_extensions_op_array_persist_calc(zend_op_array *op_array) { if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC) { zend_extension_persist_data data; data.op_array = op_array; data.size = 0; data.mem = NULL; zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_calc_handler, &data); return data.size; } return 0; } ZEND_API size_t zend_extensions_op_array_persist(zend_op_array *op_array, void *mem) { if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST) { zend_extension_persist_data data; data.op_array = op_array; data.size = 0; data.mem = mem; zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_handler, &data); return data.size; } return 0; } /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * indent-tabs-mode: t * End: */