RFR: 8352251: Implement JEP 518: JFR Cooperative Sampling [v38]

[Markus Grönlund]

> Greetings,
> 
> This is the implementation of JEP [JDK-8350338 Cooperative JFR Sampling](https://bugs.openjdk.org/browse/JDK-8350338).
> 
> Implementations in this change set are provided and have been tested on the following platforms:
> 
> - windows-x64
> - windows-x64-debug
> - linux-x64
> - linux-x64-debug
> - macosx-x64
> - macosx-x64-debug
> - linux-aarch64
> - linux-aarch64-debug
> - macosx-aarch64
> - macosx-aarch64-debug
> 
> Testing: tier1-6, jdk_jfr, stress testing.
> 
> Platform porters note:
> Some platform-specific code needs to be provided, mainly in the interpreter. Take a look at the following files for changes:
> 
> - src/hotspot/cpu/x86/frame_x86.cpp
> - src/hotspot/cpu/x86/interp_masm_x86.cpp
> - src/hotspot/cpu/x86/interp_masm_x86.hpp
> - src/hotspot/cpu/x86/javaFrameAnchor_x86.hpp
> - src/hotspot/cpu/x86/macroAssembler_x86.cpp
> - src/hotspot/cpu/x86/macroAssembler_x86.hpp
> - src/hotspot/cpu/x86/templateInterpreterGenerator_x86.cpp
> - src/hotspot/cpu/x86/templateTable_x86.cpp
> - src/hotspot/os_cpu/linux_x86/javaThread_linux_x86.hpp
> 
> Thanks
> Markus

Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:

  Refactor interpreter ucontext assertion

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24296/files
  - new: https://git.openjdk.org/jdk/pull/24296/files/5b4a7550..7d7e6f45

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24296&range=37
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24296&range=36-37

  Stats: 52 lines in 6 files changed: 12 ins; 36 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/24296.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24296/head:pull/24296

PR: https://git.openjdk.org/jdk/pull/24296