CDS filemap fastdebug assert while loading Graal CE Polyglot in isolated classloader

[Steven Schlansker]

Hi hotspot-dev,

I tried to submit a JVM crash report through bugreport.java.com, but
my attempts to submit it are rejected with a 'Request method 'POST'
not supported' error. So I will send it here as a backup.

While debugging a still-unexplained 'IncompatibleClassChangeError:
disagree on InnerClasses attribute', I tried to run our application in
a fastdebug jvm with additional logging. Instead of reproducing the
original issue, I hit an assertion error in CDS.

# assert(ent->in_named_module()) failed: must be
# Internal Error (/build/src/hotspot/share/cds/filemap.cpp:590),
pid=633408, tid=633409

V [libjvm.so+0x1414d60] ModuleEntry::ModuleEntry(Handle, bool,
Symbol*, Symbol*, Symbol*, ClassLoaderData*)+0x300
(moduleEntry.cpp:63)
V [libjvm.so+0x1414fc1] ModuleEntryTable::locked_create_entry(Handle,
bool, Symbol*, Symbol*, Symbol*, ClassLoaderData*)+0x1c1
(moduleEntry.cpp:619)
V [libjvm.so+0x141c23d] Modules::define_module(Handle, unsigned char,
_jstring*, _jstring*, _jobjectArray*, JavaThread*)+0x1f1d
(modules.cpp:402)
V [libjvm.so+0x101b099] JVM_DefineModule+0xb9 (jvm.cpp:1112)
V [libjvm.so+0xc130e7]
FileMapInfo::get_module_shared_path_index(Symbol*)+0x377
(filemap.cpp:590)

Fedora 39 Linux 6.6.6 x86_64
Reproduced on java 21u26 and 23 (519ecd352a66633589f160db7390647d90e36b99)

hs_err: https://gist.github.com/stevenschlansker/14b748af7758e4ea846ac22f12e53453

To reproduce, this is the source:

import java.io.File;
import java.io.UncheckedIOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.stream.Stream;

public class PolyglotBoom {
    public static void main(final String... args) throws Exception {
        final var cl = new URLClassLoader(
                Stream.of(
                        "polyglot",
                        "nativeimage",
                        "truffle-api",
                        "js-language",
                        "word",
                        "collections",
                        "icu4j",
                        "regex")
                            .map(fn -> {
                                try {
                                    return new File("tmp/" + fn +
"-23.1.1.jar").toURL();
                                } catch (final MalformedURLException e) {
                                    throw new UncheckedIOException(e);
                                }
                            })
                            .toArray(URL[]::new));
        final var engine =
Class.forName("org.graalvm.polyglot.Engine", false, cl)
                .getMethod("create")
                .invoke(null);
        System.err.println("engine = " + engine);
    }
}

You must use a **fastdebug** build to 'make images' target to trigger
the assertion

You need the Graal CE 23.1.1 distribution placed in 'tmp/', I got it from
https://repo1.maven.org/maven2/org/graalvm/ :

polyglot-23.1.1.jar
nativeimage-23.1.1.jar
truffle-api-23.1.1.jar
js-language-23.1.1.jar
word-23.1.1.jar
collections-23.1.1.jar
icu4j-23.1.1.jar
regex-23.1.1.jar

Also, at least glassfish jaxb-runtime is needed also in 'tmp/' :
https://repo1.maven.org/maven2/org/glassfish/jaxb/jaxb-runtime/2.3.1/jaxb-runtime-2.3.1.jar

Run attached program:
% javac PolyglotBoom.java
% jar cf tmp.jar PolyglotBoom.class
% ~/code/jdk/build/linux-x86_64-server-fastdebug/images/jdk/bin/java
-cp tmp.jar:tmp/\* -XX:ArchiveClassesAtExit=archive.jsa PolyglotBoom

Please let me know if I can provide any additional information. And it
would be good to get the bug reporting tool fixed :)
Thank you!