NullPointerException String.indexOf() #23035
Description
https://openj9-jenkins.osuosl.org/job/Test_openjdk25_j9_extended.functional_x86-64_linux_Nightly_testList_0/74
cmdLineTester_modularityddrtests17_0 -Xjit -Xgcpolicy:gencon -Xnocompressedrefs
01:57:47 Testing: Run !dumpmodule with too many arguments
01:57:47 Test start time: 2025/11/27 01:57:42 Eastern Standard Time
01:57:47 Running command: /home/jenkins/workspace/Test_openjdk25_j9_extended.functional_x86-64_linux_Nightly_testList_0/jdkbinary/j2sdk-image/bin/jdmpview -core j9core.dmp
...
01:57:47 [ERR] Exception in thread "main" java.lang.ExceptionInInitializerError
01:57:47 [ERR] at java.base/java.lang.J9VMInternals.recordInitializationFailure(J9VMInternals.java:189)
01:57:47 [ERR] at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
01:57:47 [ERR] at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1455)
01:57:47 [ERR] at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.ensureClassInitialized(MethodHandleAccessorFactory.java:341)
01:57:47 [ERR] at java.base/jdk.internal.reflect.MethodHandleAccessorFactory.newMethodAccessor(MethodHandleAccessorFactory.java:72)
01:57:47 [ERR] at java.base/jdk.internal.reflect.ReflectionFactory.newMethodAccessor(ReflectionFactory.java:119)
01:57:47 [ERR] at java.base/java.lang.reflect.Method.acquireMethodAccessor(Method.java:717)
01:57:47 [ERR] at java.base/java.lang.reflect.Method.invoke(Method.java:568)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.VMDataFactory.getVMData(VMDataFactory.java:225)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.VMDataFactory.getAllVMData(VMDataFactory.java:141)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.VMDataFactory.getVMData(VMDataFactory.java:101)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9RASImageDataFactory.getRasData(J9RASImageDataFactory.java:106)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9RASImageDataFactory.getProcessData(J9RASImageDataFactory.java:53)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImageProcess.checkFailureInfo(J9DDRImageProcess.java:119)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImageProcess.getEnvironment(J9DDRImageProcess.java:195)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImageProcess.getCommandLine(J9DDRImageProcess.java:96)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImageProcess.getExecutablePath(J9DDRImageProcess.java:262)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImage.passBackExecutablePath(J9DDRImage.java:92)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImage.<init>(J9DDRImage.java:72)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.view.dtfj.image.J9DDRImageFactory.getImage(J9DDRImageFactory.java:132)
01:57:47 [ERR] at openj9.dtfj/com.ibm.dtfj.image.j9.ImageFactory.foundImage(ImageFactory.java:416)
01:57:47 [ERR] at openj9.dtfj/com.ibm.dtfj.image.j9.ImageFactory.getImage(ImageFactory.java:246)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.commands.OpenCommand.imagesFromCommandLine(OpenCommand.java:115)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.commands.OpenCommand.run(OpenCommand.java:83)
01:57:47 [ERR] at openj9.dtfj/com.ibm.java.diagnostics.utils.Context.tryCommand(Context.java:141)
01:57:47 [ERR] at openj9.dtfj/com.ibm.java.diagnostics.utils.Context.execute(Context.java:97)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.CombinedContext.execute(CombinedContext.java:173)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.CombinedContext.execute(CombinedContext.java:157)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.Session.imageFromCommandLine(Session.java:610)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.Session.sessionInit(Session.java:226)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.Session.<init>(Session.java:175)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.Session.getInstance(Session.java:171)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.DTFJView.launch(DTFJView.java:51)
01:57:47 [ERR] at openj9.dtfjview/com.ibm.jvm.dtfjview.DTFJView.main(DTFJView.java:46)
01:57:47 [ERR] Caused by: java.lang.NullPointerException
01:57:47 [ERR] at java.base/java.lang.String.indexOf(String.java)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.getTargetType(BytecodeGenerator.java:312)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.doStructurePointerMethod(BytecodeGenerator.java:1601)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.doAccessorMethods(BytecodeGenerator.java:444)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.lambda$generate$0(BytecodeGenerator.java:1637)
01:57:47 [ERR] at java.base/jdk.internal.classfile.impl.ClassFileImpl.build(ClassFileImpl.java:144)
01:57:47 [ERR] at java.base/java.lang.classfile.ClassFile.build(ClassFile.java:558)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.generate(BytecodeGenerator.java:1640)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.PointerHelper.getClassBytes(BytecodeGenerator.java:294)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.BytecodeGenerator.getPointerClassBytes(BytecodeGenerator.java:139)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.StructureReader.getPointerClassBytes(StructureReader.java:1152)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.J9DDRClassLoader.getPointerClass(J9DDRClassLoader.java:227)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.J9DDRClassLoader.findClass(J9DDRClassLoader.java:129)
01:57:47 [ERR] at openj9.dtfj/com.ibm.j9ddr.J9DDRClassLoader.loadClass(J9DDRClassLoader.java:206)
01:57:47 [ERR] at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:1043)
01:57:47 [ERR] at com.ibm.j9ddr.vm29.pointer.AbstractPointer.<clinit>(AbstractPointer.java:57)
01:57:47 [ERR] ... 33 more
The command the test is running is !dumpmodule too many options, although I'm not sure it got that far.
The NPE isn't readily repeatable from running jdmpview -core j9core.dmp, this is likely JIT.