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Subject: Re: graph (plotutils) seg-faulting
To: cygwin AT cygwin DOT com
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Date: Thu, 23 Jul 2020 06:48:21 +0200
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From: Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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On 23.07.2020 00:12, Ken Brown via Cygwin wrote:
> On 7/22/2020 6:07 PM, Tony Richardson via Cygwin wrote:
>> On Wed, Jul 22, 2020 at 3:48 PM Marco Atzeri via Cygwin 
>> <cygwin AT cygwin DOT com>
>> wrote:
>>
>>> On 22.07.2020 14:06, Ken Brown via Cygwin wrote:
>>>> On 7/22/2020 1:36 AM, Marco Atzeri via Cygwin wrote:
>>>>> On 22.07.2020 02:10, Tony Richardson via Cygwin wrote:
>>>>>> I have attached both the cygcheck and strace output.
>>>>>>
>>>>>> Tony Richardson
>>>>>>
>>>>>
>>>>> something is clearly interfering with your Cygwin installation
>>>>>
>>>>> --- Process 11136 loaded C:\Applications\cygwin64\bin\cygwin1.dll at
>>>>> 0000000000c80000
>>>>> --- Process 11136 unloaded DLL at 0000000000c80000
>>>>
>>>> I can reproduce the problem on my system:
>>>>
>>>> $ strace graph
>>> ...
>>>
>>>> Segmentation fault
>>>>
>>>>
>>>> I thought that simply rebuilding plotutils might fix the problem, but
>>>> there were a lot of compilation warnings, and the build failed.  
>>>> Some of
>>>> the warnings look serious to me, but I have no idea if they could cause
>>>> Windows to try to load DLLs at strange addresses.
>>>>
>>>> Ken
>>>> -- 
>>>
>>> Hi Ken,
>>> I rebuilt and uploaded a test version 2.6-6 only for 64bit
>>> try to see if something change
>>>
>>> Regards
>>> Marco
>>>
>>
>> I tried the test version, unfortunately it still segfaults for me.
no surprise. It was unlikely to work

> 
> Same for me.  I'm also getting strange output from ldd, but maybe that's 
> just another manifestation of the same problem:
> 
> $ ldd /usr/bin/graph
>          ntdll.dll => /c/WINDOWS/SYSTEM32/ntdll.dll (0x7ff82a4c0000)
>          KERNEL32.DLL => /c/WINDOWS/System32/KERNEL32.DLL (0x7ff8289c0000)
>          KERNELBASE.dll => /c/WINDOWS/System32/KERNELBASE.dll 
> (0x7ff8280c0000)
>          cygplot-2.dll => /usr/bin/cygplot-2.dll (0x9f0000)
>          cygplot-2.dll => /usr/bin/cygplot-2.dll (0xbf0000)
>          cygplot-2.dll => /usr/bin/cygplot-2.dll (0xbf0000)
>          cygwin1.dll => /usr/bin/cygwin1.dll (0xd20000)
> [...]
>          cygintl-8.dll => /usr/bin/cygintl-8.dll (0x1760000)
>          cygintl-8.dll => /usr/bin/cygintl-8.dll (0x1760000)
>          cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x1780000)
>          cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x1780000)
> 
> Ken
> -- 


can you check with
   cat /proc/self/maps

Usually I see

locale.nls loaded verylow

00010000-00020000 rw-s 00000000 0000:0000 0                   [win heap 
1 default shared]
00030000-0004D000 r--s 00000000 0000:0000 0
00050000-00054000 r--s 00000000 0000:0000 0
00060000-00061000 r--s 00000000 0000:0000 0
00070000-00072000 rw-p 00000000 0000:0000 0
00080000-00149000 r--s 00000000 98EE:C713 281474977436242 
/cygdrive/c/Windows/System32/locale.nls
00150000-00152000 rw-p 00000000 0000:0000 0                   [win heap 
0 default grow]
00152000-00182000 ===p 00002000 0000:0000 0                   [win heap 
0 default grow]

the program itself

100400000-100401000 r--p 00000000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
100401000-100406000 r-xp 00001000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
100406000-100407000 rw-p 00006000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
100407000-10040C000 r--p 00007000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
10040C000-10040F000 rw-p 0000C000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
10040F000-100410000 r--p 0000F000 D603:FB6E 281474976713960 
/usr/bin/cat.exe
180010000-180020000 rw-s 00000000 0000:0000 0                 [procinfo]
180020000-180029000 rw-s 00000000 0000:0000 0 
[cygwin-user-shared]
180030000-18003C000 rw-s 00000000 0000:0000 0 
[cygwin-shared]

loading area for cygwin  DLLs

180040000-180041000 r--p 00000000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180041000-180229000 r-xp 00001000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180229000-18022D000 rwxp 001E9000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
18022D000-180266000 rw-p 001ED000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180266000-1802EA000 r--p 00226000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
1802EA000-180322000 rw-p 002AA000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180322000-180331000 r--p 002E2000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180331000-180342000 rw-p 002F1000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180342000-180343000 r--p 00302000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
180343000-180650000 rw-p 00303000 D603:FB6E 1688849860266440 
/usr/bin/cygwin1.dll
3CC3A0000-3CC3A1000 r--p 00000000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3A1000-3CC3A8000 r-xp 00001000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3A8000-3CC3A9000 rw-p 00008000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3A9000-3CC3AE000 r--p 00009000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3AE000-3CC3AF000 rw-p 0000E000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3AF000-3CC3B0000 r--p 0000F000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3B0000-3CC3B2000 rw-p 00010000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3CC3B2000-3CC3B4000 r--p 00012000 D603:FB6E 281474976713233 
/usr/bin/cygintl-8.dll
3D9690000-3D9691000 r--p 00000000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D9691000-3D96A9000 r-xp 00001000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D96A9000-3D96AA000 rw-p 00019000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D96AA000-3D978F000 r--p 0001A000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D978F000-3D9790000 rw-p 000FF000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D9790000-3D9791000 r--p 00100000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D9791000-3D9793000 rw-p 00101000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
3D9793000-3D9795000 r--p 00103000 D603:FB6E 281474976713163 
/usr/bin/cygiconv-2.dll
800000000-800080000 rw-p 00000000 0000:0000 0                 [heap]
800080000-820000000 ===p 00080000 0000:0000 0                 [heap]

and over the Windows DLL

7FF9C0880000-7FF9C0881000 r--p 00000000 98EE:C713 281474977436944 
/cygdrive/c/Windows/System32/cryptbase.dll
7FF9C0881000-7FF9C0884000 r-xp 00001000 98EE:C713 281474977436944 
/cygdrive/c/Windows/System32/cryptbase.dll
7FF9C0884000-7FF9C0887000 r--p 00004000 98EE:C713 281474977436944 
/cygdrive/c/Windows/System32/cryptbase.dll
7FF9C0887000-7FF9C0888000 rw-p 00007000 98EE:C713 281474977436944 
/cygdrive/c/Windows/System32/cryptbase.dll


Also check that /etc/rebase.db.x86_64 esists

FYI, all my dlls are loaded between


$ rebase -si | awk '{print $3, $1}'| sort  | head
0x000394760000 /usr/lib/qt4/plugins/designer/cygqdeclarativeview.dll
0x000394780000 /usr/lib/qt4/plugins/codecs/cygqtwcodecs.dll
0x000396730000 /usr/lib/python3.6/site-packages/dbus/mainloop/pyqt5.dll
0x000398df0000 
/usr/lib/python3.6/site-packages/PIL/_webp.cpython-36m-x86_64-cygwin.dll
0x000399a60000 /usr/libexec/coreutils/libstdbuf.so
0x000399a70000 /usr/lib/zsh/5.8/zsh/zutil.dll
0x000399a80000 /usr/lib/zsh/5.8/zsh/zselect.dll
0x000399a90000 /usr/lib/zsh/5.8/zsh/zpty.dll
0x000399aa0000 /usr/lib/zsh/5.8/zsh/zprof.dll
0x000399ab0000 /usr/lib/zsh/5.8/zsh/zleparameter.dll

$ rebase -si | awk '{print $3, $1}'| sort  | tail
0x0003ffd50000 /usr/bin/cygFS-6.dll
0x0003ffd70000 /usr/bin/cygFLAC-8.dll
0x0003ffdf0000 /usr/bin/cygFLAC++-6.dll
0x0003ffe10000 /usr/bin/cygEMF-1.dll
0x0003ffe40000 /usr/bin/cygEGL-1.dll
0x0003ffe70000 /usr/bin/cyg4ti2util-0.dll
0x0003ffe90000 /usr/bin/cyg4ti2int64-0.dll
0x0003fff00000 /usr/bin/cyg4ti2int32-0.dll
0x0003fff70000 /usr/bin/cyg4ti2gmp-0.dll
0x0003ffff0000 /usr/bin/cyg4ti2common-0.dll

with the obvious exception of cygwin1.dll  at 180040000
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