0001151: Crash when another extension calls call_user_function() during RINIT

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0001151

Xdebug

Usage problems (Wrong Results)

public

2015-05-14 23:25

2015-05-29 13:42

Reporter

francois

Assigned To

derick

Priority

normal

Severity

crash

Reproducibility

always

Status

closed

Resolution

fixed

Platform

Vmware Workstation W 7

Centos

OS Version

6.4

Product Version

2.3.2

Target Version

2.3.3

Fixed in Version

2.3.3

Summary

0001151: Crash when another extension calls call_user_function() during RINIT

Description

(PHP 5.6.4) When trying to use xdebug and the phk PECL extension, php during first RINIT without executing anything.

Trace shows :

Program received signal SIGSEGV, Segmentation fault.
0x001373b7 in xdebug_add_stack_frame (zdata=0xbfffe524, op_array=0x0, type=1)
    at /K/Work/Dev/xdebug-2.3.2/xdebug_stack.c:992
992 XDEBUG_LLIST_TAIL(XG(stack)) &&

#0 0x001373b7 in xdebug_add_stack_frame (zdata=0xbfffe524, op_array=0x0,
    type=1) at /K/Work/Dev/xdebug-2.3.2/xdebug_stack.c:992
#1 0x0011dd76 in xdebug_execute_internal (current_execute_data=0xbfffe524,
    fci=0xbfffe5dc, return_value_used=1)
    at /K/Work/Dev/xdebug-2.3.2/xdebug.c:1616
0000002 0x083e893b in zend_call_function (fci=0xbfffe5dc, fci_cache=0xbfffe510)
    at /pdata/soft/php/php-5.6.4/Zend/zend_execute_API.c:852
0000003 0x083e7c8a in call_user_function_ex (function_table=0x88bd8d8,
    object_pp=0xbfffe6a0, function_name=0xb7fc4e4c, retval_ptr_ptr=0xbfffe630,
    param_count=1, params=0xb7fc4ed0, no_separation=1, symbol_table=0x0)
    at /pdata/soft/php/php-5.6.4/Zend/zend_execute_API.c:620
0000004 0x083e7b17 in call_user_function (function_table=0x88bd8d8,
    object_pp=0xbfffe6a0, function_name=0xb7fc4e4c, retval_ptr=0xb7fc4e0c,
    param_count=1, params=0xbfffe700)
    at /pdata/soft/php/php-5.6.4/Zend/zend_execute_API.c:593
0000005 0x00386821 in ut_call_user_function (obj_zp=0x0,
    func=0x399952 "spl_autoload_register", func_len=21, ret=0xb7fc4e0c,
    nb_args=1, args=0xbfffe700) at /proj/phk/pecl/public/utils.c:519
0000006 0x00386472 in ut_call_user_function_void (obj_zp=0x0,
    func=0x399952 "spl_autoload_register", func_len=21, nb_args=1,
    args=0xbfffe700) at /proj/phk/pecl/public/utils.c:410
0000007 0x00389da7 in Automap_Loader_register_hook ()
    at /proj/phk/pecl/public/Automap_Loader.c:50
0000008 0x0038a528 in RINIT_Automap_Loader ()
    at /proj/phk/pecl/public/Automap_Loader.c:157
0000009 0x00398b85 in zm_activate_phk (type=1, module_number=31)
    at /proj/phk/pecl/public/php_phk.c:155
0000010 0x08401c73 in zend_activate_modules ()
    at /pdata/soft/php/php-5.6.4/Zend/zend_API.c:2414
0000011 0x0837b46d in php_request_startup ()
    at /pdata/soft/php/php-5.6.4/main/main.c:1672
0000012 0x0849672f in do_cli (argc=1, argv=0x88bd460)
    at /pdata/soft/php/php-5.6.4/sapi/cli/php_cli.c:965
0000013 0x0849790f in main (argc=1, argv=0x88bd460)
    at /pdata/soft/php/php-5.6.4/sapi/cli/php_cli.c:1378

Crash happens when phk tries to register its autoloader to spl_autoload_register() using call_user_function(). If I remove this call, everything works fine.

Problem because I don't know another way to register an autoloader from an extension.

Steps To Reproduce

Download the 'phk' PECL extension (clone it from github:flaupretre/pecl-phk, don't get it from PECL). In the 'develop' branch, look for the 'xdebug_2.3.2_crash' tag. This is the version I experienced the problem with. Compile and install. Activate in php.ini along with xdebug. Run the 'php' CLI command.

Tags

No tags attached.

Operating System

PHP Version

5.6.0-5.6.4

Attached Files

Relationships

Notes
(0003091) francois (reporter) 2015-05-29 13:26	No need to clone a specific version. The phk package released on PECL (3.0.0) shows the same problem.

(0003092) derick (administrator) 2015-05-29 13:42	https://github.com/xdebug/xdebug/pull/178 [^]

Issue History
Date Modified	Username	Field	Change
2015-05-14 23:25	francois	New Issue
2015-05-29 13:21	derick	Assigned To	=> derick
2015-05-29 13:21	derick	Status	new => assigned
2015-05-29 13:21	derick	Target Version	=> 2.3.3
2015-05-29 13:26	francois	Note Added: 0003091
2015-05-29 13:42	derick	Note Added: 0003092
2015-05-29 13:42	derick	Status	assigned => closed
2015-05-29 13:42	derick	Resolution	open => fixed
2015-05-29 13:42	derick	Fixed in Version	=> 2.3.3
2016-07-31 13:36	derick	Category	Usage problems => Usage problems (Crashes)
2016-07-31 13:38	derick	Category	Usage problems (Crashes) => Usage problems (Wrong Results)