[mapserver-dev] Crash on Windows: fontcache.c
jmckenna at gatewaygeomatics.com
Sun Oct 19 12:45:35 PDT 2014
On 2014-10-19 4:30 PM, Even Rouault wrote:
> Le dimanche 19 octobre 2014 21:14:33, Jeff McKenna a écrit :
>> Hi devs,
>> With git/master on Windows, I trigger a crash of
>> mapserv.exe/mapserver.dll any time I call mapserv.exe in CGI mode. (no
>> issue with MapServer 6.4.1)
>> - The good news is that I can reproduce this at the commandline with
>> 'mapserv -nh'.
>> C:\ms4w> mapserv -nh
>> This script can only be used to decode form results and
>> should be initiated as a CGI process via a httpd server.
>> For other options please try using the --help switch.
>> (then a crash occurs, with this info below)
>> Problem signature:
>> Problem Event Name: APPCRASH
>> Application Name: mapserv.exe
>> Application Version: 0.0.0.0
>> Application Timestamp: 54440643
>> Fault Module Name: mapserver.dll
>> Fault Module Version: 0.0.0.0
>> Fault Module Timestamp: 54440640
>> Exception Code: c0000005
>> Exception Offset: 00274c8b
>> OS Version: 6.0.6002.2.2.0.768.2
>> - I compiled mapserv in Debug mode (Visual Studio 2008)
>> - in the Visual Studio 2008 debugger this message appears:
>> message: Unhandled exception at 0x10274c8b (mapserver.dll) in
>> 0xC0000005: Access violation reading location 0xdddddddd.
>> - the debugger stops at:
>> line 92: FT_Done_FreeType(c->library);
>> - the call stack at that point is:
>> mapserver.dll!_FT_Done_Library() + 0x7b bytes
>> mapserver.dll!_FT_Done_FreeType() + 0x11 bytes
>> mapserver.dll!msFreeFontCache(ft_cache * c=0x104bf560) Line 92 + 0xb
>> mapserver.dll!msFontCacheCleanup() Line 164 + 0x9 bytes
>> mapserver.dll!msCleanup(int signal=1) Line 1967
>> mapserv.exe!msCleanupOnExit() Line 74 + 0x7 bytes
>> msvcr90d.dll!doexit(int code=0, int quick=0, int retcaller=0) Line
>> 591 C msvcr90d.dll!exit(int code=0) Line 412 + 0xd bytes
>> mapserv.exe!main(int argc=2, char * * argv=0x0453da10) Line 315 +
>> 0xa bytes
>> mapserv.exe!__tmainCRTStartup() Line 586 + 0x19 bytes
>> mapserv.exe!mainCRTStartup() Line 403
>> [Frames below may be incorrect and/or missing, no symbols loaded
>> for kernel32.dll]
>> libeay32.dll!cms_SignedData_init_bio(CMS_ContentInfo_st * cms=) Line
>> 817 + 0xe bytes
>> I'm wondering if anyone has any ideas of what I can try, or if you need
>> more information. I am pretty stuck. Thanks everyone,
> Not tested, but by code review, I believe the issue is that msCleanup() must
> be called twice on Windows.
> Once by msCleanup(0) at line 308 of mapserv.c
> And twiche by the code at line 237 of mapserv.c
> #ifdef WIN32
> atexit( msCleanupOnExit );
> I'd recommand you trying to remove those 3 lines. I can't see any reason for a
> win32 specific code path.
Even that did it! (I removed the second call, the 3 lines, for
msCleanupOnExit, as you said). Wow! Thank you so much. Will you
commit this into master now? I can also, but, you solved it.
I can also file a ticket if you want this to be recorded. Let me know.
I owe you a beer.
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