php - 在 C 中自定义 PHP 扩展中的段错误实例化类

Question

我正在开发自己的 PHP 扩展，其中包含一个类。我最近从 Ubuntu 9.04 升级到 9.10，扩展失败了。从那以后，我尝试更新到 10.04 以查看它是否修复了它，因为我的开发环境是 10.04，并且在那里工作正常。与我能理解的唯一主要区别是服务器是 64 位，而我的笔记本电脑是 32 位架构。我有 PHP 版本 5.3.2-1ubuntu4.5(Zend build 20090626)。

我已经尝试运行我的测试 PHP 文件:

<?php$server =  "http://localhost/";$port = 1214;$f = new PPKeyClient($server, $port);var_dump($f);

在 GDB 中:

root@node:/etc/php5/conf.d# gdb phpGNU gdb (GDB) 7.1-ubuntuCopyright (C) 2010 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law.  Type "show copying"and "show warranty" for details.This GDB was configured as "x86_64-linux-gnu".For bug reporting instructions, please see:...Reading symbols from /usr/bin/php...Reading symbols from /usr/lib/debug/usr/bin/php5...done.done.(gdb) run -f /var/www/test.php Starting program: /usr/bin/php -f /var/www/test.php[Thread debugging using libthread_db enabled][New Thread 0x7fffef15b710 (LWP 9228)][Thread 0x7fffef15b710 (LWP 9228) exited]1Program received signal SIGSEGV, Segmentation fault.0x00000000006e7767 in zend_do_fcall_common_helper_SPEC (execute_data=0x7fff00000000)    at /build/buildd/php5-5.3.2/Zend/zend_vm_execute.h:371371 /build/buildd/php5-5.3.2/Zend/zend_vm_execute.h: No such file or directory. in /build/buildd/php5-5.3.2/Zend/zend_vm_execute.h(gdb) bt#0  0x00000000006e7767 in zend_do_fcall_common_helper_SPEC (execute_data=0x7fff00000000)    at /build/buildd/php5-5.3.2/Zend/zend_vm_execute.h:371#1  0x00000000006bec20 in execute (op_array=0xfef1b0) at /build/buildd/php5-5.3.2/Zend/zend_vm_execute.h:104#2  0x000000000069694d in zend_execute_scripts (type=0, retval=0x7fffffffbf90, file_count=3)    at /build/buildd/php5-5.3.2/Zend/zend.c:1266#3  0x0000000000642598 in php_execute_script (primary_file=0x2) at /build/buildd/php5-5.3.2/main/main.c:2288#4  0x0000000000727a56 in main (argc=0, argv=0x1) at /build/buildd/php5-5.3.2/sapi/cli/php_cli.c:1196(gdb) 

以及扩展中的相关位:

PHP_MINIT_FUNCTION(pp){        // Register PPKeyClient class        zend_class_entry ce;        INIT_CLASS_ENTRY(ce, "PPKeyClient", pp_functions);        PPKeyClient_ce = zend_register_internal_class(&ce TSRMLS_CC);        PPKeyClient_ce->create_object = PPKeyClient_object_new;        memcpy(&PPKeyClient_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));        PPKeyClient_handlers.clone_obj = NULL;        return SUCCESS;}zend_object_value PPKeyClient_object_new(zend_class_entry *ce TSRMLS_DC){        zend_object_value retval;        PPKeyClient_object *intern;        // TODO - only instantiate look at        // http://stackoverflow.com/questions/1906565/php-extension-library-accessing-php-superglobals        // or google for http://www.google.co.uk/search?hl=en&safe=off&q=superglobals+in+php+extensions&aq=f&aqi=&aql=&oq=&gs_rfai=        intern = ecalloc(1, sizeof(PPKeyClient_object));        zend_object_std_init(&(intern->std), ce TSRMLS_CC);        zend_hash_copy(intern->std.properties, &ce->default_properties, (copy_ctor_func_t) zval_add_ref, NULL, sizeof(zval *));        intern->last_curl_result = PPKC_NO_REQUEST;        retval.handle = zend_objects_store_put(intern, PPKeyClient_object_dtor, NULL, NULL TSRMLS_CC);        retval.handlers = &PPKeyClient_handlers;        return retval;}PHP_METHOD(PPKeyClient, __construct){        PPKeyClient_object *intern;        char *url, *ssl_ca_crt = NULL;        int port = 80, url_len, ssl_ca_crt_len = 0, ua_len = 0;        if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ls", &url, &url_len, &port, &ssl_ca_crt, &ssl_ca_crt_len) == SUCCES$        {                intern = (PPKeyClient_object*)zend_object_store_get_object(getThis() TSRMLS_CC);//              intern->port = port;//              intern->baseurl = estrndup(url, url_len);//              intern->baseurl_len = url_len;//              intern->ssl_ca_crt = estrndup(ssl_ca_crt, ssl_ca_crt_len);//              intern->ssl_ca_crt_len = ssl_ca_crt_len;//              intern->useragent = "PP KeyClient (PPExt#" PHP_PRIVATE_PASSWORDS_EXTNAME " v" PHP_PRIVATE_PASSWORDS_VERSION ")";        }}

我知道注释 intern = (PPKeyClient_object*)zend_object_store_get_object... 行可以让它工作，但显然我不能在没有它的情况下从构造函数设置值。

我迷路了，如果能帮我找出问题，我将不胜感激!

Answer 1

我看到一些安装了 libsafe 的 Ubuntu 版本，如果 Ubuntu 9.04 是这种情况，可能错误总是存在......

因为libsafe可以“避免”一些缓冲区溢出、double free等一些bug。

我不熟悉 PHP 扩展... getThis() 是来自 PHP API 的函数还是您的函数？如果是你的，你能寄给我吗？