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From: Michael Paquier <[email protected]>
To: Andres Freund <[email protected]>
Cc: Niyas Sait <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Julien Rouhaud <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: [PATCH] Add native windows on arm64 support
Date: Sat, 27 Aug 2022 11:33:51 +0900
Message-ID: <YwmCj/[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <Yl9TmT/[email protected]>
	<CAFPTBD9qPsFMN_Y0HwR+2uRtQGfVnQRa-mxUnAu-MhyEnf8JHA@mail.gmail.com>
	<[email protected]>
	<CAFPTBD8Mk0X3h0UhWDbN7dLf1-eFeqcE8Qe3SUKzH9b+Gj1kBg@mail.gmail.com>
	<[email protected]>
	<CAFPTBD-+YT0wZTh_KJHK+G_DfA9+Y6FrkACkCFz8d4+BZjacuQ@mail.gmail.com>
	<Ynm5g2152/yKc/[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

On Thu, Aug 25, 2022 at 08:29:43PM -0700, Andres Freund wrote:
> It's really not great that 7f3e17b4827 disabled randomization without even a
> comment as to why...

This story is on this thread, with some processes not able to start:
https://www.postgresql.org/message-id/BD0D89EC2438455C9DE0DC94D36912F4@maumau

> There actually seems to have been a lot of work in that area. See 617dc6d299c
> / bcbf2346d69 and as well as the retrying in 45e004fb4e39. Those weren't
> prevented by us disabling ASLR.

Indeed.  45e004f looks like the most interesting bit here.  FWIW, I
would not mind re-enabling that on HEAD, as of something like the
attached.  I have done a dozen of runs without seeing a test failure,
and knowing that we don't support anything older than Win10 makes me
feel safer about this change.  Any objections?
--
Michael


Attachments:

  [text/x-diff] 0001-Re-enable-ASLR-on-Windows.patch (973B, ../YwmCj%[email protected]/2-0001-Re-enable-ASLR-on-Windows.patch)
  download | inline diff:
From 0fde47c2d4e65bd9f1f5a7b4607f8b8b95162242 Mon Sep 17 00:00:00 2001
From: Michael Paquier <[email protected]>
Date: Sat, 27 Aug 2022 10:20:53 +0900
Subject: [PATCH] Re-enable ASLR on Windows

---
 src/tools/msvc/MSBuildProject.pm | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/tools/msvc/MSBuildProject.pm b/src/tools/msvc/MSBuildProject.pm
index 62acdda3a1..594729ceb7 100644
--- a/src/tools/msvc/MSBuildProject.pm
+++ b/src/tools/msvc/MSBuildProject.pm
@@ -347,7 +347,6 @@ sub WriteItemDefinitionGroup
       <ProgramDatabaseFile>.\\$cfgname\\$self->{name}\\$self->{name}.pdb</ProgramDatabaseFile>
       <GenerateMapFile>false</GenerateMapFile>
       <MapFileName>.\\$cfgname\\$self->{name}\\$self->{name}.map</MapFileName>
-      <RandomizedBaseAddress>false</RandomizedBaseAddress>
       <!-- Permit links to MinGW-built, 32-bit DLLs (default before VS2012). -->
       <ImageHasSafeExceptionHandlers/>
       <SubSystem>Console</SubSystem>
-- 
2.37.2



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