[jdk21u-dev] RFR: 8261242: [Linux] OSContainer::is_containerized() returns true when run outside a container

[Jan Kratochvil]

On Tue, 15 Apr 2025 13:14:30 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> A patch 3 of 6 for: [[21u] Backport intention of 8322420: [Linux] cgroup v2: Limits in parent nested control groups are not detected](https://mail.openjdk.org/pipermail/jdk-updates-dev/2025-April/043206.html)
> 
> It has a patch dependency on PR 2 of 6: https://github.com/openjdk/jdk21u-dev/pull/1649
> 
> This backport is clean. But it contains an additional oneliner (by Yuri Nesterenko):
> 
> make/data/hotspot-symbols/symbols-linux:
> +JVM_IsContainerized
> 
> as otherwise the build would fail with:
> 
> src/java.base/linux/native/libjava/CgroupMetrics.c:42:(.text+0x11): undefined reference to `JVM_IsContainerized'
> 
> This oneliner was not needed in JDK24 as there is [JDK-8017234: Hotspot should stop using mapfiles](https://bugs.openjdk.org/browse/JDK-8017234).

Replaced by: https://github.com/openjdk/jdk21u-dev/pull/1661

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1650#issuecomment-2809153036