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

[David Holmes]

Hi Steven,

On 22/12/2023 11:12 am, Steven Schlansker wrote:
> 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.

I've filed

https://bugs.openjdk.org/browse/JDK-8322657

for you.

Regards,
David
-----

> 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!