Register sun.nio.ch.SelectorImpl fields for unsafe access. (#9631)
Motivation: On JDK > 9 Netty uses Unsafe to write two internal JDK fields: sun.nio.ch.SelectorImp.selectedKeys and sun.nio.ch.SelectorImpl.publicSelectedKeys. This is done in transport/src/main/java/io/netty/channel/nio/NioEventLoop.java:225, in openSelector() method. The GraalVM analysis cannot do the Unsafe registration automatically because the object field offset computation is hidden behind two layers of calls. Modifications: This PR updates the Netty GraalVM configuration by registering those fields for unsafe access. Result: Improved support for Netty on GraalVM with JDK > 9.
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@ -4,5 +4,12 @@
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"methods": [
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{ "name": "<init>", "parameterTypes": [] }
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]
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},
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{
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"name": "sun.nio.ch.SelectorImpl",
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"fields": [
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{ "name": "selectedKeys", "allowUnsafeAccess" : true},
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{ "name": "publicSelectedKeys", "allowUnsafeAccess" : true}
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]
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}
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]
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