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Date:	Fri, 21 Aug 2009 10:50:54 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: [1.7.0-60] "git gc" still crashes with cmalloc error
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On Aug 21 02:59, mikey wrote:
> I just upgraded to 1.7.0-60 and ran the same "git gc" command that was  
> failing in:
>
>   http://cygwin.com/ml/cygwin/2009-08/msg00620.html
>
> and I got a cmalloc error again.  I captured strace output but I don't  
> know how much of it you need.  Here are the last few lines before the  
> crash:
>
>   56 24175056 [main] git 9052 cygpsid::debug_print: get_sids_info: owner 
> SID = S-1-5-21-1830819319-1975652134-394877016-22497
>   16 24175072 [main] git 9052 cygpsid::debug_print: get_sids_info: group 
> SID = S-1-5-21-1830819319-1975652134-394877016-513
>   16 24175088 [main] git 9052 get_info_from_sd: ACL 124, uid 32497, gid 10513
>   24 24175112 [main] git 9052 fhandler_base::fstat_helper: 0 = fstat (, 
> 0x22BBE0) st_atime=4A8A4022 st_size=2766869216, st_mode=0x8124,  
> st_ino=27303072741378156, sizeof=96
>   32 24175144 [main] git 9052 MapView: 0x6D5C0000 (status 0x0) =  
> NtMapViewOfSection (h:65C, addr:0, len:33554432, off:56000000,  
> protect:80, type:0)
>   68 24175212 [main] git 9052 mmap64: 0x6D5C0000 = mmap()   28 24175240 
> [main] git 9052 munmap: munmap (addr 70360000, len 33554432)
>  976 24176216 [main] git 9052 build_fh_pc: fh 0x6120D36C
>   91 24176307 [main] git 9052 munmap: 0 = munmap(): 70360000
>   25 24176332 [main] git 9052 mmap64: addr 0, len 33554432, prot 1,  
> flags 2, fd 3, off 1325400064
>  779 24177111 [main] git 9052 seterrno_from_win_error:  
> /ext/build/netrel/src/cygwin-1.7.0-60/winsup/cygwin/cygheap.cc:145  
> windows error 487
>   15 24177126 [main] git 9052 geterrno_from_win_error: windows error 487 
> == errno 22
>   15 24177141 [main] git 9052 __set_errno: void  
> seterrno_from_win_error(const char*, int, DWORD):319 val 22
>   68 24177209 [main] git 9052 C:\cygwin2\bin\git.exe: *** fatal error - 
> cmalloc would have returned NULL

Thanks.  It took some time to reproduce it, but I think I found the
problem.  A file handler datastructure was allocated in mmap() and
parts of it never got free'd, starting with the changes in 1.7.0-53.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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