[jdk17u-dev] RFR: 8312065: Socket.connect does not timeout when profiling [v10]

[Long Yang]

> Hi all,
> 
> This pull request contains a fix for [JDK-8312065](https://bugs.openjdk.org/browse/JDK-8312065).
> 
> The old SocketImpl is still present in JDK 17, can be enabled with -Djdk.net.usePlainSocketImpl.
> 
> I have verified that this problem exists on Linux and macOS, and I feel that it also exists on AIX, 
> so I repaired these 3 platforms. Windows implementations are different, so don't have this problem.
> 
> All callers of NET_Poll() already check for EINTR, so the fix is to remove do-while loop in the implementation of NET_Poll().
> 
> Other methods, such as NET_Read, NET_NonBlockingRead, NET_Accept, NET_Connect, are not affected.
> Because if Socket has timeout, it will call NET_Timeout first, and then call them. NET_Timeout has a correct timeout implementation and is not affected by profiling signals.
> If the Socket does not have a timeout, and if the system call is interrupted by a signal, the [Linux Kernel will automatically retry](https://man7.org/linux/man-pages/man7/signal.7.html), and the application code will not be aware of it.
> 
> Thanks!

Long Yang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8312065-fix
 - use monotonically increasing time(System.nanoTime()) in place of currentTimeMillis
 - use JNI_TRUE/JNI_FALSE to avoid introducing more ifdefs
 - update comments
 - Add a RETRY macro argument to avoid code duplication
 - Check if SocketTimeoutException meets the specified time. Print detailed failure message.
 - push to trigger github workflows
 - Remove useless CountDownLatch
 - use libNativeThread to get OS thread id and send signal
 - 8312065: Socket.connect does not timeout as expected when profiling

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1639/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1639/files/f52c4036..e1631701

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1639&range=09
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1639&range=08-09

  Stats: 9606 lines in 190 files changed: 7173 ins; 1569 del; 864 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1639.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1639/head:pull/1639

PR: https://git.openjdk.org/jdk17u-dev/pull/1639