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Date:	Mon, 16 Jan 2023 18:02:13 +0900
To:	cygwin AT cygwin DOT com
Subject:	Re: Cygwin 3.4.3 and 3.5.0... hangs in make, top, procps, ls
	/proc/PID/...
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From:	Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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Hi Corinna,

On Mon, 9 Jan 2023 14:20:56 +0100
Corinna Vinschen wrote:
> On Jan  2 17:21, Takashi Yano via Cygwin wrote:
> > On Mon, 2 Jan 2023 14:38:03 +0900
> > Takashi Yano wrote:
> > > On Mon, 2 Jan 2023 11:32:01 +0900
> > > Takashi Yano wrote:
> > > > On Sat, 31 Dec 2022 13:01:29 -0700
> > > > Brian Inglis wrote:
> > > > > was also getting the messages below locally and still on GitHub scallywag:
> > > > > 
> > > > > 	cygcheck (6936) child_copy: cygheap read copy failed,
> > > > > 
> > > > > ../curl/scallywag/1_x86_64  build.log:2022-12-26T00:39:35.6163236Z       0 
> > > > > [main] cygcheck (6936) child_copy: cygheap read copy failed, 0x0..0x80003B5F0, 
> > > > > done 0, windows pid 6936, Win32 error 299
> > > > > [...]
> > > I found this issue occurs after the commit 30add3e6b3e3:
> > > "Cygwin: exec: don't access cygheap before it's initialized"
> > > .
> > > 
> > > Reverting this commit solves the issue.
> 
> That would break strace again, but...
> 
> > I'm not sure if this is the right thing, but the following
> > patch seems to fix the issue.
> 
> This looks pretty good to me and it keeps strace working per the
> description in 30add3e6b3e3.  Please push this to master and the
> 3.4 branch.

I noticed that the following error occurs even with this patch.
If you run:
while true; do cygcheck -cd cygwin > /dev/null; done
for one day or so, you will find the issue can be reproduced.

Both cygwin-3_4-branch and main (master) branch have this issue,
while cygwin 3.3.6 does not.

$ while true; do cygcheck -cd cygwin > /dev/null; done
      0 [main] cygcheck (15244) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'shared.5'(0x138), Win32 error 487.  Terminating.
   3540 [main] cygcheck (15244) cygwin_exception::open_stackdumpfile: Dumping st
ack trace to cygcheck.exe.stackdump
      0 [main] cygcheck (10844) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.51742'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (1976) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'cygpid.50736'(0x140), Win32 error 487.  Terminating.
      0 [main] cygcheck (1988) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'shared.5'(0x13C), Win32 error 487.  Terminating.
    602 [main] cygcheck (1988) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (11372) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.9643'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (15160) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    723 [main] cygcheck (15160) cygwin_exception::open_stackdumpfile: Dumping st
ack trace to cygcheck.exe.stackdump
      0 [main] cygcheck (8676) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'shared.5'(0x138), Win32 error 487.  Terminating.
    761 [main] cygcheck (8676) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      1 [main] cygcheck (10232) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    560 [main] cygcheck (10232) cygwin_exception::open_stackdumpfile: Dumping st
ack trace to cygcheck.exe.stackdump
      0 [main] cygcheck (13588) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.4525'(0x140), Win32 error 487.  Terminating.
      0 [main] cygcheck (2524) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    671 [main] cygcheck (2524) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (1196) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'cygpid.14199'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (14700) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.54704'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (1020) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'shared.5'(0x13C), Win32 error 487.  Terminating.
    701 [main] cygcheck (1020) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (12352) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'shared.5'(0x140), Win32 error 487.  Terminating.
    655 [main] cygcheck (12352) cygwin_exception::open_stackdumpfile: Dumping st
ack trace to cygcheck.exe.stackdump
      0 [main] cygcheck (4640) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    744 [main] cygcheck (4640) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (13160) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    711 [main] cygcheck (13160) cygwin_exception::open_stackdumpfile: Dumping st
ack trace to cygcheck.exe.stackdump
      0 [main] cygcheck (6864) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    683 [main] cygcheck (6864) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (10600) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.13224'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (2380) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    848 [main] cygcheck (2380) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (7096) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    799 [main] cygcheck (7096) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump
      0 [main] cygcheck (14600) C:\cygwin64\bin\cygcheck.exe: *** fatal error -
MapViewOfFileEx 'cygpid.3522'(0x144), Win32 error 487.  Terminating.
      0 [main] cygcheck (1924) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx 'cygpid.11223'(0x148), Win32 error 487.  Terminating.
      0 [main] cygcheck (1268) C:\cygwin64\bin\cygcheck.exe: *** fatal error - M
apViewOfFileEx '(null)'(0x10C), Win32 error 487.  Terminating.
    858 [main] cygcheck (1268) cygwin_exception::open_stackdumpfile: Dumping sta
ck trace to cygcheck.exe.stackdump

Errors seem to be three types: (null), cygpid.xxx and shared.5.
I'm not sure what is happening and why at all, however, this
did not seem to happen before the commit 30add3e6b3e3.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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