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From:	jojelino <jojelino AT gmail DOT com>
Subject:	Re: Built perl 5.6.2 on Cygwin 1.7.11, but get SIGABRT from resulting perl.exe
Date:	Thu, 19 Jul 2012 11:01:20 +0900
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On 2012-07-19 AM 2:45, Nicholas DiPiazza wrote:
> Jojelino asked:
>
>     "What was the result of
>      gdb --args perl
>      symbol cygwin1.dll
>      define btc
>      bt
>      c
>      end
>      # "Function "_sigfe_free" not defined." shouldn't be seen. if it does,
> please use latest snapshot including debug symbol.
>      b _sigfe_free
>      disp *((unsigned*)$esp+1)
>      r
>      btc
>      #and just press enter until sigabrt is hit. ?"
>
> Here is the result.
>
> $ gdb --args perl
> GNU gdb (GDB) 7.3.50.20111026-cvs (cygwin-special)
> Copyright (C) 2011 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i686-cygwin".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /home/windows7-vm/perl-5.6.2/perl...done.
> (gdb) symbol cygwin1.dll
> Load new symbol table from "/usr/bin/cygwin1.dll"? (y or n) y
> Reading symbols from /usr/bin/cygwin1.dll...(no debugging symbols
> found)...done.
> (gdb) define btc
> Type commands for definition of "btc".
> End with a line saying just "end".
>> bt
>> c
>> end
> (gdb) b _sigfe_free
> Breakpoint 1 at 0x610d420a
> (gdb) disp *((unsigned*)$esp+1)
> (gdb) r
> Starting program: /home/windows7-vm/perl-5.6.2/perl
> [New Thread 2184.0xec0]
> [New Thread 2184.0xef0]
>
> Breakpoint 1, 0x610d420a in _sigfe_free ()
>     from /cygdrive/c/cygwin/bin/cygwin1.dll
> 1: *((unsigned*)$esp+1) = 2147483664
> (gdb) btc
> #0  0x610d420a in _sigfe_free () from /cygdrive/c/cygwin/bin/cygwin1.dll
> #1  0x61082119 in malloc_init() () from /cygdrive/c/cygwin/bin/cygwin1.dll
> #2  0x00000000 in ?? ()
>
> Program received signal SIGABRT, Aborted.
> 0x7718f8b1 in ntdll!RtlUpdateClonedSRWLock ()
>     from /cygdrive/c/Windows/system32/ntdll.dll
> 1: *((unsigned*)$esp+1) = 1987840657
> (gdb)
> #0  0x7718f8b1 in ntdll!RtlUpdateClonedSRWLock ()
>     from /cygdrive/c/Windows/system32/ntdll.dll
> #1  0x7718f8b1 in ntdll!RtlUpdateClonedSRWLock ()
>     from /cygdrive/c/Windows/system32/ntdll.dll
> #2  0x767c0a91 in WaitForSingleObjectEx ()
>     from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
> #3  0x000000a8 in ?? ()
> #4  0x00000000 in ?? ()
>
>
>
>
>
Hello, Nicholas.
It seems that perl-5.6.2 supplies its own malloc, which is incompatible 
to cygwin.
and cygwin startfile crt0.o which is linked with your perl build accepts 
malloc of perl-5.6.2/malloc.c during its initialization, please fix your 
perl build not to override malloc.


-- 
Regards.


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