JEP 479: Remove the Windows 32-bit x86 Port
Author | George Adams & Saint Wesonga |
Owner | George Adams |
Type | Feature |
Scope | Implementation |
Status | Completed |
Release | 24 |
Component | hotspot / other |
Discussion | jdk dash dev at openjdk dot org |
Effort | S |
Duration | S |
Relates to | JEP 449: Deprecate the Windows 32-bit x86 Port for Removal |
JEP 501: Deprecate the 32-bit x86 Port for Removal | |
Reviewed by | Magnus Ihse Bursie, Vladimir Kozlov |
Endorsed by | Vladimir Kozlov |
Created | 2024/04/19 07:33 |
Updated | 2024/11/13 20:32 |
Issue | 8330623 |
Summary
Remove the source code and build support for the Windows 32-bit x86 port. This port was deprecated for removal in JDK 21 with the express intent to remove it in a future release.
Goals
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Remove all code paths that apply only to Windows 32-bit x86.
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Cease all testing and development efforts targeting the Windows 32-bit x86 platform.
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Simplify the JDK's build and test infrastructure.
Non-Goals
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It is not a goal to remove or change 32-bit support for any platforms other than Windows.
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It is not a goal to remove either code or support for Windows 32-bit in previous releases.
Motivation
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Allow contributors in the OpenJDK Community to accelerate the development of new features and enhancements that will move the platform forward.
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The implementation of JEP 436 (Virtual Threads) for Windows x86-32 falls back to the use of kernel threads and therefore does not bring the expected benefits of Project Loom.
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Windows 10, the last Windows operating system to support 32-bit operation, will reach End of Life in October 2025.
Description
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Find and remove all code paths in the code base that apply only to Windows 32-bit.
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Modify the JDK build system to remove support for compiling on Windows 32-bit platforms, and halt testing activities for this architecture.
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Update the JDK documentation to reflect the removal of Windows 32-bit support, and publicize this change so as to ensure a smooth transition for users and developers.
Risks and Assumptions
Some users may still rely on 32-bit Java applications on Windows. This change requires Java applications running on 32-bit Windows to migrate to a 64-bit JDK and Windows environment, or else remain on legacy versions of the JDK, prior to JDK 23, which still include 32-bit support. Transition guidance and support by distributions and vendors of JDK binaries will be critical.