[crac] RFR: Merge jdk:jdk-25+3 [v2]

[Dmitry Cherepanov]

> Merge with jdk-25:3
> 
> There are several conflicts between CRaC specific changes (https://github.com/openjdk/crac/pull/10) and incoming JDK changes for https://bugs.openjdk.org/browse/JDK-8342995
> 
> https://github.com/openjdk/crac/pull/10 moved some parts from `linux/attachListener_linux.cpp` to 
>  - `linux/linuxAttachOperation.hpp` which later were renamed to `posix/posixAttachOperation.hpp`
>  - `linux/attachListener_linux.hpp` which later were renamed to `posix/attachListener_posix.hpp`
> 
> As a part of this merge, I manually applied JDK changes for `posix/attachListener_posix.cpp` to `posix/posixAttachOperation.hpp` & `posix/attachListener_posix.hpp`
>  - new `SocketChannel` class moved to `posix/posixAttachOperation.hpp`
>  - changes in `PosixAttachOperation` class incorporated into `posix/posixAttachOperation.hpp`
>  - added `#include "os_posix.hpp"` to define `RESTARTABLE`
>  - kept `socket()` function in `PosixAttachOperation` class as it’s used by [VM_Crac::is_socket_from_jcmd](https://github.com/openjdk/crac/blob/647105388b66b7acedf03d049dc60323912a8fe7/src/hotspot/os/linux/crac_linux.cpp#L279) 
>  - changes in `PosixAttachListener` class incorporated into `posix/attachListener_posix.hpp`
> 
> Additional changes in `posix/attachListener_posix.cpp`
>  - changes in `PosixAttachOperation::complete` incorporated into `write_operation_result`
> 
> <details>
> 
> <summary>Conflicts</summary>
> 
> 
> commit c54dd827b39e7e0066959e4985e4aaefd5452a10 (HEAD -> merge-jdk, dmitry-crac/merge-jdk)
> Merge: 410d0e168c3 23d6f747824
> Author: Dmitry Cherepanov <dcherepanov at azul.com>
> Date:   Mon Apr 14 13:55:59 2025 +0400
> 
>     Merge with jdk:jdk-25+3
> 
> diff --git a/.jcheck/conf b/.jcheck/conf
> remerge CONFLICT (content): Merge conflict in .jcheck/conf
> index 1d117b1d825..25bd8dd0b94 100644
> --- a/.jcheck/conf
> +++ b/.jcheck/conf
> @@ -4,12 +4,7 @@ jbs=JDK
>  version=25
>  
>  [checks]
> -<<<<<<< 410d0e168c3 (8353243: [CRaC] Show all options in engine help)
>  error=whitespace
> -=======
> -error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists,copyright
> -warning=issuestitle,binary
> ->>>>>>> 23d6f747824 (8346463: Add test coverage for deploying the default provider as a module)
>  
>  [checks "reviewers"]
>  committers=1
> @@ -18,31 +13,3 @@ ignore=duke
>  [census]
>  version=0
>  domain=openjdk.org
> -<<<<<<< 410d0e168c3 (8353243: [CRaC] Show all options in engine help)
> -=======
> -
> -[checks "whitespace"]
> -files=.*.cpp|.*.hpp|.*.c|.*.h|.*.java|.*.cc|.*.hh|.*.m|.*.mm|.*.S|.*.md|.*.properties|.*.gmk|....

Dmitry Cherepanov has updated the pull request incrementally with one additional commit since the last revision:

  socket function should be const

-------------

Changes:
  - all: https://git.openjdk.org/crac/pull/224/files
  - new: https://git.openjdk.org/crac/pull/224/files/c54dd827..a4b8b754

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=224&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=224&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/crac/pull/224.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/224/head:pull/224

PR: https://git.openjdk.org/crac/pull/224