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Hi,

Here's the dump from a crash we had today:


Report for php-cgi.exe_210319_075908.dmp


Type of Analysis Performed Crash Analysis 
Machine Name  
Operating System Windows Server - 17763 
Number Of Processors  
Process ID 2536 
Process Image C:\Program Files\PHP\v7.4\php-cgi.exe 
Command Line "C:\Program Files\PHP\v7.4\php-cgi.exe" 
System Up-Time 10 day(s) 11:48:07 
Process Up-Time 02:18:01 
Processor Type X64 
Process Bitness 64-Bit 



Faulting Thread

Entry point   php_cgi!mainCRTStartup 
Create time   19/3/2021 5:41:07 πμ 
Time spent in user mode   0 Days 0:3:36.953 
Time spent in kernel mode   0 Days 0:1:29.62 






    Arg 1

    Arg 2

    Arg 3

    Arg 4

  Source

php_wincache!get_module+a483     0000215`3ab48b78     0000000`00000000     0000000`00038b78     0000000`00000063    
php_wincache!get_module+954d     0000000`00000228     0000000`00000000     0000215`3a226968     0000000`00000063    
php_wincache!get_module+3c13     0000000`00000000     00000ca`577fb9e1     0000000`00000000     00000ca`577fba98    
php_wincache!get_module+3095     0000215`3ab180b0     0000215`3d8c77f8     0000215`3d8c7701     00000ca`577fba90    
php_wincache+1278     0000000`00001505     00000ca`577fbb00     0000000`00000000     0000000`00000000    
php_opcache!persistent_stream_open_function+86 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\ext\opcache\zendaccelerator.c @ 2252 + 10]     0000000`00000000     00000ca`577fbb49     0000215`00000056     0000000`00000000   c:\php-snap-build\php74\vc15\x64\php-7.4.16\ext\opcache\zendaccelerator.c @ 2252 + 10 
php7!zend_include_or_eval+2e9 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_execute.c @ 4262 + 21]     0000215`39467000     0000000`00000000     0000215`39413b20     0000000`00000001   c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_execute.c @ 4262 + 21 
php7!ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER+40 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 37775]     0000215`39413b20     0000000`00000000     0000000`00130000     0000215`39467000   c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 37775 
php7!execute_ex+2f [c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 53655 + f]     0000215`39413020     0000000`00000000     0000000`00130000     0000000`00000008   c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 53655 + f 
php7!zend_execute+152 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 57958]     0000000`00000000     00000ca`577fcd10     0000000`00000000     0000000`00000008   c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend_vm_execute.h @ 57958 
php7!zend_execute_scripts+a1 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend.c @ 1680]     0000215`00000008     0000000`00000000     0000000`00000003     0000000`00000000   c:\php-snap-build\php74\vc15\x64\php-7.4.16\zend\zend.c @ 1680 
php7!php_execute_script+259 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\main\main.c @ 2623]     0000000`00000001     0000000`00000001     0000000`00000000     0000000`00000000   c:\php-snap-build\php74\vc15\x64\php-7.4.16\main\main.c @ 2623 
php_cgi!main+15d1 [c:\php-snap-build\php74\vc15\x64\php-7.4.16\sapi\cgi\cgi_main.c @ 2599]     0000000`00000000     0000000`00000000     0007ff9`437fb570     0000000`00000000   c:\php-snap-build\php74\vc15\x64\php-7.4.16\sapi\cgi\cgi_main.c @ 2599 
php_cgi!__scrt_common_main_seh+10c [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 288 + 22]     0000000`00000000     0000000`00000000     0000000`00000000     0000000`00000000   d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 288 + 22 
kernel32!BaseThreadInitThunk+14     0000000`00000000     0000000`00000000     0000000`00000000     0000000`00000000    
ntdll!RtlUserThreadStart+21     0000000`00000000     0000000`00000000     0000000`00000000     0000000`00000000    




Exception Information


PHP_WINCACHE!GET_MODULE+A483WARNING - DebugDiag was not able to locate debug symbols for \php_wincache.dll, so the information below may be incomplete.

In php-cgi.exe_210319_075908.dmp the assembly instruction at php_wincache!get_module+a483 in C:\Program Files\PHP\v7.4\ext\php_wincache.dll from Microsoft Corp. has caused an access violation exception (0xC0000005) when trying to read from memory location 0x00000000 on thread 0




Module Information 

Image Name: C:\Program Files\PHP\v7.4\ext\php_wincache.dll   Symbol Type:  Export 
Base address: 0x00000003`00905a4d   Time Stamp:  Thu Jan 23 04:52:21 2020  
Checksum: 0x00000000`00000000   Comments:   
COM DLL: False   Company Name:  Microsoft Corp. 
ISAPIExtension: False   File Description:  Windows Cache Extension for PHP 
ISAPIFilter: False   File Version:  2.0.0.8 
Managed DLL: False   Internal Name:   
VB DLL: False   Legal Copyright:  Copyright Β© 2016 Microsoft Corp. All Rights Reserved. 
Loaded Image Name:  php_wincache.dll   Legal Trademarks:   
Mapped Image Name:     Original filename:  php_wincache.dll 
Module name:  php_wincache   Private Build:   
Single Threaded:  False   Product Name:  Windows Cache Extension2.0 for PHP 7.4 
Module Size:  152 KBytes   Product Version:  2.0 
Symbol File Name:  php_wincache.dll   Special Build:  &

So this looks related to Wincache.

Please note that we're using 4 worker processes on the server (two for each application pool).

Hi, since we're getting this several times per day, for now we have disabled WinCache.

opening

Thanks for the stack backtrace.  Indeed, that looks like a
WinCache issue.  I'll try to have a closer look.

I just got word from the extension maintainers that no more
bugfixes are planned.  Consider to run without WinCache.

hmm, how come?

Wincache will be abandoned?