Bug #60699 [Opn->Nab]: mysqli_init() crashes under high concurrency
Edit report at https://bugs.php.net/bug.php?id=60699&edit=1
ID: 60699
Updated by: johannes@php.net
Reported by: ninzya at inbox dot lv
Summary: mysqli_init() crashes under high concurrency
-Status: Open
+Status: Not a bug
Type: Bug
Package: MySQLi related
Operating System: Windows 7
PHP Version: 5.4.0RC5
Block user comment: N
Private report: N
New Comment:
Solved as bug #55334.
Previous Comments:
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[2012-11-08 09:03:54] PCC at HOTMAIL dot COM
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[2012-01-19 07:40:05] ninzya at inbox dot lv
Duplicate of https://bugs.php.net/bug.php?id=55334
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[2012-01-14 09:30:30] ninzya at inbox dot lv
Changed status to Open
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[2012-01-13 12:04:02] ninzya at inbox dot lv
Followed instructions on getting backtrace for Windows using Debug diagnostic
tool and got no meaningful info out of it.
Here's the error:
In
httpd__PID__4312__Date__01_13_2012__Time_01_52_49PM__761__Second_Chance_Exceptio
n_C0000005.dmp the assembly instruction at php5ts!_efree+85 in C:\Program Files
(x86)\PHP\5.4.0RC5\php5ts.dll from The PHP Group has caused an access violation
exception (0xC0000005) when trying to read from memory location 0x3a61f988 on
thread 15
And here's information on thread 15:
Thread 15 - System ID 5604
Entry point msvcrt!_endthreadex+6f
Create time 1/13/2012 1:49:32 PM
Time spent in user mode 0 Days 00:00:00.015
Time spent in kernel mode 0 Days 00:00:00.015
Function Source
ntdll!NtRaiseException+12
ntdll!KiUserExceptionDispatcher+29
Now the exception info:
PHP5TS!_EFREE+85In
httpd__PID__4312__Date__01_13_2012__Time_01_52_49PM__761__Second_Chance_Exceptio
n_C0000005.dmp the assembly instruction at php5ts!_efree+85 in C:\Program Files
(x86)\PHP\5.4.0RC5\php5ts.dll from The PHP Group has caused an access violation
exception (0xC0000005) when trying to read from memory location 0x3a61f988 on
thread 15
Module information:
Image Name: C:\Program Files (x86)\PHP\5.4.0RC5\php5ts.dll Symbol Type: PDB
Base address: 0x00905a4d Time Stamp: Fri Jan 06 03:02:19 2012
Checksum: 0x00000000 Comments:
COM DLL: False Company Name: The PHP Group
ISAPIExtension: False File Description: PHP Script Interpreter
ISAPIFilter: False File Version: 5.4.0RC5
Managed DLL: False Internal Name: PHP Script Interpreter
VB DLL: False Legal Copyright: Copyright © 1997-2010 The PHP Group
Loaded Image Name: php5ts.dll Legal Trademarks: PHP
Mapped Image Name: Original filename: php5ts.dll
Module name: php5ts Private Build:
Single Threaded: False Product Name: PHP
Module Size: 5.91 MBytes Product Version: 5.4.0RC5
Symbol File Name: c:\program files (x86)\php\5.4.0rc5\debug\php5ts.pdb
Special Build: &
Notice "Symbol File Name"... PDB files were loaded correctly and I have no clue
why there's no info on stack trace for thread 15.
For comparison, here's stack trace for some other thread, that did not raise any
exceptions:
Thread 6 - System ID 2748
Entry point msvcrt!_endthreadex+6f
Create time 1/13/2012 1:49:32 PM
Time spent in user mode 0 Days 00:00:00.015
Time spent in kernel mode 0 Days 00:00:00.015
Function Source
php5ts!_zend_mm_alloc_int+d c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\zend\zend_alloc.c @ 1877 + d
php5ts!_emalloc+32 c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\zend\zend_alloc.c @ 2425 + 5
php5ts!zendparse+70a c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\zend\zend_language_parser.y @ 987 + 25
php5ts!compile_file+15a c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\zend\zend_language_scanner.l @ 579 + c
php5ts!phar_compile_file+87 c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\ext\phar\phar.c @ 3391 + 1d
php5ts!zend_execute_scripts+80 c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\zend\zend.c @ 1264 + b
php5ts!php_execute_script+1a7 c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\main\main.c @ 2476 + 12
php5apache2_2!php_handler+417 c:\php-sdk\php54dev-ts\vc9\x86\php-
5.4.0rc5\sapi\apache2handler\sapi_apache2.c @ 667 + 23
libhttpd!ap_run_handler+21 .\server\config.c @ 158 + 21
libhttpd!ap_invoke_handler+b0 .\server\config.c @ 376 + 6
libhttpd!ap_internal_redirect+37 .\modules\http\http_request.c @ 557
mod_rewrite!handler_redirect+7b mod_rewrite.c @ 4839 + 31
libhttpd!ap_run_handler+21 .\server\config.c @ 158 + 21
libhttpd!ap_invoke_handler+b0 .\server\config.c @ 376 + 6
libhttpd!ap_process_request+3e .\modules\http\http_request.c @ 286
libhttpd!ap_process_http_connection+4c .\modules\http\http_core.c @ 190 + 6
libhttpd!ap_run_process_connection+21 .\server\connection.c @ 43 + 21
libhttpd!ap_process_connection+33 .\server\connection.c @ 190 + 6
libhttpd!worker_main+9c .\server\mpm\winnt\child.c @ 784
msvcrt!_endthreadex+44
msvcrt!_endthreadex+ce
kernel32!BaseThreadInitThunk+e
ntdll!__RtlUserThreadStart+70
ntdll!_RtlUserThreadStart+1b
Any clues? Maybe you can take any apache, take php 5.4.0RC5 ts, configure it as
module, enable mysqli, create php file with "<?php mysqli_init(); ?>", run a
stress test, get the crash and find out what it causes?
------------------------------------------------------------------------
[2012-01-12 09:42:39] pajoye@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php
for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php
for Win32
Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.
Please keep the category so that the mysql team knows about it.
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