[jdk18u] RFR: 8281615: Deadlock caused by jdwp agent

[Zhengyu Gu]

I would like to backport this patch to jdk18u, because without the fix, jdwp can potential deadlock whole JVM.

Test:
- [x] Testbase_nsk_jdi
- [x] Testbase_nsk_jvmti
- [x] Testbase_nsk_jdwp

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Commit messages:
 - Backport e1060bee2adb9f2e07ca09309d0f89132db30f28

Changes: https://git.openjdk.java.net/jdk18u/pull/31/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=31&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281615
  Stats: 31 lines in 1 file changed: 18 ins; 5 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/31.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/31/head:pull/31

PR: https://git.openjdk.java.net/jdk18u/pull/31