Crash during optimizing exploded image with my patch

[erik.joelsson at oracle.com]

Hello Chen Liang,

The exploded image optimization step runs the newly built JDK (in the 
exploded image) to generate data for itself. This means that if you 
change something fundamental in the JDK core libraries or the JVM, that 
may cause crashes in this build step. To diagnose further, you can 
run/debug the exploded image directly.

/Erik

On 8/31/23 19:54, - wrote:
> Hello,
> I am trying to create a patch [1] that optimizes forEach for immutable 
> factory collections (from List/Set.of) to see how it compares with 
> constant-folded random access. However, this patch somehow tampers 
> with exploded image optimization and modules during build, and I 
> cannot build this patch on my windows 11 device.
>
> I have tried using both Oracle JDK 20 build 20+36-2344 (in JAVA_HOME) 
> and the JDK 21 build 35 as boot JDK. JDK 20 fails with an IAE with 
> message "Bad package name" (seems to be from modules.cpp) and JDK 21 
> fails with an NPE 'java.lang.NullPointerException: Cannot invoke 
> "java.lang.module.ResolvedModule.name 
> <http://java.lang.module.ResolvedModule.name>()" because 
> "resolvedModules[index]" is null', both happening after reconfiguring 
> and cleaning. These are my command-line:
>
> bash configure --with-boot-jdk=/cygdrive/c/java/boot/jdk-21 
> --enable-hsdis-bundling --with-hsdis=capstone 
> --with-capstone=/cygdrive/c/java/capstone-4.0.2-win64 
> --with-jmh=build/jmh/jars --with-conf-name=windows-x64 
> --enable-jtreg-failure-handler
>
> Does anybody have any clue on why my patch fails the build? And how 
> can I resolve this problem?
>
> Chen Liang
>
> [1] https://github.com/liachmodded/jdk/pull/new/feature/imm-coll-stream
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