Hi! Recently when packaging OpenJDK 24-ga for AOSC OS, I hit an compilation error on loongson3 (which is a variant of mips64), saying that javac is running out of stack space:
> java.lang.StackOverflowError > at jdk.compiler.interim/ com.sun.tools.javac.code.Type.constValue(Type.java:186) > at jdk.compiler.interim/ com.sun.tools.javac.code.Type$JCPrimitiveType.isFalse(Type.java:823) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$AssignAnalyzer.scanCond(Flow.java:2365) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitBinary(Flow.java:3181) > at jdk.compiler.interim/ com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:2221) > at jdk.compiler.interim/ com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:50) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:463) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$AssignAnalyzer.scan(Flow.java:2097) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$AssignAnalyzer.scanCond(Flow.java:2382) > at jdk.compiler.interim/ com.sun.tools.javac.comp.Flow$AssignAnalyzer.visitBinary(Flow.java:3181) > at jdk.compiler.interim/ com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:2221) > ... (rest of output omitted) For the full build log, please see the log of our build system [1]. We use zero variant for loongson3 currently (and it is the only architecture we supported using zero). As it build on other architectures properly, I think it is likely just because the default stack size is too small, unlikely to be a dead loop in javac. I attempted to add "--with-boot-jdk-jvmargs=-Xss256M" to extend the thread stack size but it changed nothing. The configure command is: > bash configure --with-jvm-variants=zero --enable-precompiled-headers --with- boot-jdk-jvmargs=-Xss256M --with-conf-name=aosc --with-stdc++lib=dynamic -- disable-warnings-as-errors --enable-linktime-gc --with-native-debug- symbols=zipped What should I try next? Is this a bug or a even larger stack is required? [1] https://buildit.aosc.io/logs/73789-openjdk-24-loongson3-Misaka23333-2025-03-22-03:32:47.txt -- Bingwu Zhang (@xtex) @ Fri, 21 Mar 2025 23:12:49 +0000
