On 2023-01-18 02:42, Corinna Vinschen via Cygwin wrote:
Hi Takashi,
On Jan 18 18:16, Takashi Yano via Cygwin wrote:
On Jan 16 22:42, Corinna Vinschen via Cygwin wrote:
I pushed some patches to fix this issue. Excessive debugging indicated
that the reason cygcheck fails in this way is:
- It's a non-Cygwin process which
- is built with high-entropy ASLR and
- tries to load the Cygwin DLL dynamically and
- therefore suffers from the fact that recent Cygwin code doesn't
expect that certain memory regions are used by Windows itself.
Which they are, due to the high-entropy stuff.
The patches are supposed to make the code less rigid in terms of the
addresses of certain memory regions, as well as dropping the
high-entropy VA flag from builds of strace and cygcheck, both of which
are loading the Cygwin DLL dynamically as part of their job.
The test release 3.5.0-0.116.g8d318bf142f7 contains the patches, for
everybody to try.
Thank you very much for working on this problem. It seems that
it was unexpectedly large-scale modification.
I confirmed that the problem has been fixed with these patches.
The test case has been running for 11 hours but the problem does
not happen so far.
Great.
I tested this yesterday with 7 runs on two machines in parallel while
building Cygwin continuously in another Window, and cygcheck still with
high-entropy-VA enabled. And one of the machines continued to run the
cygcheck loops over night and were still in good shape this morning :)
I guess we should release 3.4.4 pretty soon now.
I installed and tested 3.5.0-0.122.g3c2ac163da88.x86_64 instead, as that was the
autoselected test version.
When cygcheck -hrsv was run as usual in local postinstall script
zp_z2_l_cygcheck-hrsv.dash gave error msg box can't find zlib1.dll - but it's
there:
$ ls -glo /usr/x86_64-w64-mingw32/sys-root/mingw/bin/zlib1.dll
-rwxr-xr-x 1 117267 Oct 15 12:14
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/zlib1.dll
Under X/mintty/bash cygcheck will not even start - says so in error msg box with
code 0xc000007b!
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry
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