mirror of
https://github.com/php/php-src.git
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403 lines
13 KiB
C
403 lines
13 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@php.net> |
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| Zeev Suraski <zeev@php.net> |
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+----------------------------------------------------------------------+
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*/
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#include "zend_extensions.h"
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#include "zend_system_id.h"
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ZEND_API zend_llist zend_extensions;
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ZEND_API uint32_t zend_extension_flags = 0;
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ZEND_API int zend_op_array_extension_handles = 0;
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static int last_resource_number;
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zend_result zend_load_extension(const char *path)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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DL_HANDLE handle;
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handle = DL_LOAD(path);
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if (!handle) {
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#ifndef ZEND_WIN32
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fprintf(stderr, "Failed loading %s: %s\n", path, DL_ERROR());
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#else
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fprintf(stderr, "Failed loading %s\n", path);
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/* See http://support.microsoft.com/kb/190351 */
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fflush(stderr);
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#endif
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return FAILURE;
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}
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#ifdef ZEND_WIN32
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char *err;
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if (!php_win32_image_compatible(handle, &err)) {
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zend_error(E_CORE_WARNING, err);
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return FAILURE;
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}
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#endif
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return zend_load_extension_handle(handle, path);
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#else
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fprintf(stderr, "Extensions are not supported on this platform.\n");
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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return FAILURE;
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#endif
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}
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zend_result zend_load_extension_handle(DL_HANDLE handle, const char *path)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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zend_extension *new_extension;
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const zend_extension_version_info *extension_version_info = (const zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
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if (!extension_version_info) {
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extension_version_info = (const zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
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}
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new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
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if (!new_extension) {
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new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
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}
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if (!extension_version_info || !new_extension) {
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fprintf(stderr, "%s doesn't appear to be a valid Zend extension\n", path);
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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DL_UNLOAD(handle);
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return FAILURE;
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}
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/* allow extension to proclaim compatibility with any Zend version */
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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)) {
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if (extension_version_info->zend_extension_api_no > ZEND_EXTENSION_API_NO) {
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fprintf(stderr, "%s requires Zend Engine API version %d.\n"
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"The Zend Engine API version %d which is installed, is outdated.\n\n",
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new_extension->name,
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extension_version_info->zend_extension_api_no,
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ZEND_EXTENSION_API_NO);
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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DL_UNLOAD(handle);
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return FAILURE;
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} else if (extension_version_info->zend_extension_api_no < ZEND_EXTENSION_API_NO) {
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fprintf(stderr, "%s requires Zend Engine API version %d.\n"
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"The Zend Engine API version %d which is installed, is newer.\n"
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"Contact %s at %s for a later version of %s.\n\n",
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new_extension->name,
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extension_version_info->zend_extension_api_no,
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ZEND_EXTENSION_API_NO,
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new_extension->author,
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new_extension->URL,
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new_extension->name);
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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DL_UNLOAD(handle);
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return FAILURE;
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}
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} else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) &&
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(!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
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fprintf(stderr, "Cannot load %s - it was built with configuration %s, whereas running engine is %s\n",
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new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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DL_UNLOAD(handle);
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return FAILURE;
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} else if (zend_get_extension(new_extension->name)) {
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fprintf(stderr, "Cannot load %s - it was already loaded\n", new_extension->name);
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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DL_UNLOAD(handle);
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return FAILURE;
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}
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zend_register_extension(new_extension, handle);
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return SUCCESS;
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#else
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fprintf(stderr, "Extensions are not supported on this platform.\n");
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/* See http://support.microsoft.com/kb/190351 */
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#ifdef ZEND_WIN32
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fflush(stderr);
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#endif
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return FAILURE;
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#endif
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}
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void zend_register_extension(zend_extension *new_extension, DL_HANDLE handle)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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zend_extension extension;
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extension = *new_extension;
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extension.handle = handle;
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zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);
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zend_llist_add_element(&zend_extensions, &extension);
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if (extension.op_array_ctor) {
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zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_CTOR;
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}
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if (extension.op_array_dtor) {
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zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_DTOR;
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}
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if (extension.op_array_handler) {
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zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_HANDLER;
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}
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if (extension.op_array_persist_calc) {
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zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC;
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}
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if (extension.op_array_persist) {
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zend_extension_flags |= ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST;
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}
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/*fprintf(stderr, "Loaded %s, version %s\n", extension.name, extension.version);*/
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#endif
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}
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static void zend_extension_shutdown(zend_extension *extension)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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if (extension->shutdown) {
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extension->shutdown(extension);
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}
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#endif
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}
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/* int return due to zend linked list API */
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static int zend_extension_startup(zend_extension *extension)
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{
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#if ZEND_EXTENSIONS_SUPPORT
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if (extension->startup) {
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if (extension->startup(extension)!=SUCCESS) {
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return 1;
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}
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zend_append_version_info(extension);
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}
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#endif
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return 0;
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}
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void zend_startup_extensions_mechanism(void)
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{
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/* Startup extensions mechanism */
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zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
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zend_op_array_extension_handles = 0;
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last_resource_number = 0;
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}
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void zend_startup_extensions(void)
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{
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zend_llist_apply_with_del(&zend_extensions, (int (*)(void *)) zend_extension_startup);
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}
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void zend_shutdown_extensions(void)
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{
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zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_shutdown);
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zend_llist_destroy(&zend_extensions);
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}
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void zend_extension_dtor(zend_extension *extension)
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{
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#if ZEND_EXTENSIONS_SUPPORT && !ZEND_DEBUG
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if (extension->handle && !getenv("ZEND_DONT_UNLOAD_MODULES")) {
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DL_UNLOAD(extension->handle);
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}
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#endif
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}
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static void zend_extension_message_dispatcher(const zend_extension *extension, int num_args, va_list args)
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{
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int message;
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void *arg;
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if (!extension->message_handler || num_args!=2) {
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return;
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}
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message = va_arg(args, int);
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arg = va_arg(args, void *);
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extension->message_handler(message, arg);
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}
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ZEND_API void zend_extension_dispatch_message(int message, void *arg)
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{
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zend_llist_apply_with_arguments(&zend_extensions, (llist_apply_with_args_func_t) zend_extension_message_dispatcher, 2, message, arg);
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}
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ZEND_API int zend_get_resource_handle(const char *module_name)
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{
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if (last_resource_number<ZEND_MAX_RESERVED_RESOURCES) {
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zend_add_system_entropy(module_name, "zend_get_resource_handle", &last_resource_number, sizeof(int));
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return last_resource_number++;
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} else {
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return -1;
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}
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}
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/**
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* The handle returned by this function can be used with
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* `ZEND_OP_ARRAY_EXTENSION(op_array, handle)`.
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*
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* The extension slot has been available since PHP 7.4 on user functions and
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* has been available since PHP 8.2 on internal functions.
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*
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* # Safety
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* The extension slot made available by calling this function is initialized on
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* the first call made to the function in that request. If you need to
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* initialize it before this point, call `zend_init_func_run_time_cache`.
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*
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* The function cache slots are not available if the function is a trampoline,
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* which can be checked with something like:
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*
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* if (fbc->type == ZEND_USER_FUNCTION
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* && !(fbc->op_array.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)
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* ) {
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* // Use ZEND_OP_ARRAY_EXTENSION somehow
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* }
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*/
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ZEND_API int zend_get_op_array_extension_handle(const char *module_name)
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{
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int handle = zend_op_array_extension_handles++;
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zend_add_system_entropy(module_name, "zend_get_op_array_extension_handle", &zend_op_array_extension_handles, sizeof(int));
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return handle;
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}
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/** See zend_get_op_array_extension_handle for important usage information. */
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ZEND_API int zend_get_op_array_extension_handles(const char *module_name, int handles)
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{
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int handle = zend_op_array_extension_handles;
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zend_op_array_extension_handles += handles;
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zend_add_system_entropy(module_name, "zend_get_op_array_extension_handle", &zend_op_array_extension_handles, sizeof(int));
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return handle;
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}
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ZEND_API size_t zend_internal_run_time_cache_reserved_size(void) {
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return zend_op_array_extension_handles * sizeof(void *);
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}
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ZEND_API void zend_init_internal_run_time_cache(void) {
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size_t rt_size = zend_internal_run_time_cache_reserved_size();
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if (rt_size) {
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size_t functions = zend_hash_num_elements(CG(function_table));
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zend_class_entry *ce;
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ZEND_HASH_MAP_FOREACH_PTR(CG(class_table), ce) {
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functions += zend_hash_num_elements(&ce->function_table);
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} ZEND_HASH_FOREACH_END();
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char *ptr = zend_arena_calloc(&CG(arena), functions, rt_size);
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zend_internal_function *zif;
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ZEND_HASH_MAP_FOREACH_PTR(CG(function_table), zif) {
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if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL)
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{
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ZEND_MAP_PTR_SET(zif->run_time_cache, (void *)ptr);
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ptr += rt_size;
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}
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} ZEND_HASH_FOREACH_END();
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ZEND_HASH_MAP_FOREACH_PTR(CG(class_table), ce) {
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ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, zif) {
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if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL)
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{
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ZEND_MAP_PTR_SET(zif->run_time_cache, (void *)ptr);
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ptr += rt_size;
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}
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} ZEND_HASH_FOREACH_END();
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} ZEND_HASH_FOREACH_END();
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}
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}
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ZEND_API zend_extension *zend_get_extension(const char *extension_name)
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{
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zend_llist_element *element;
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for (element = zend_extensions.head; element; element = element->next) {
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zend_extension *extension = (zend_extension *) element->data;
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if (!strcmp(extension->name, extension_name)) {
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return extension;
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}
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}
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return NULL;
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}
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typedef struct _zend_extension_persist_data {
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zend_op_array *op_array;
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size_t size;
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char *mem;
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} zend_extension_persist_data;
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static void zend_extension_op_array_persist_calc_handler(zend_extension *extension, zend_extension_persist_data *data)
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{
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if (extension->op_array_persist_calc) {
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data->size += extension->op_array_persist_calc(data->op_array);
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}
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}
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static void zend_extension_op_array_persist_handler(zend_extension *extension, zend_extension_persist_data *data)
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{
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if (extension->op_array_persist) {
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size_t size = extension->op_array_persist(data->op_array, data->mem);
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if (size) {
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data->mem = (void*)((char*)data->mem + size);
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data->size += size;
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}
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}
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}
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ZEND_API size_t zend_extensions_op_array_persist_calc(zend_op_array *op_array)
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{
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if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST_CALC) {
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zend_extension_persist_data data;
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data.op_array = op_array;
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data.size = 0;
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data.mem = NULL;
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zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_calc_handler, &data);
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return data.size;
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}
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return 0;
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}
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ZEND_API size_t zend_extensions_op_array_persist(zend_op_array *op_array, void *mem)
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{
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if (zend_extension_flags & ZEND_EXTENSIONS_HAVE_OP_ARRAY_PERSIST) {
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zend_extension_persist_data data;
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data.op_array = op_array;
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data.size = 0;
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data.mem = mem;
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zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_persist_handler, &data);
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return data.size;
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}
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return 0;
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}
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