https://www.graalvm.org/ 
class com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup implements com.oracle.svm.core.graal.snippets.CEntryPointSnippets$IsolateCreationWatcher
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup
  super_class: java.lang.Object
{
  private static final com.oracle.svm.core.c.CGlobalData<org.graalvm.word.Pointer> baseIsolate;
    descriptor: Lcom/oracle/svm/core/c/CGlobalData;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    Signature: Lcom/oracle/svm/core/c/CGlobalData<Lorg/graalvm/word/Pointer;>;

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 125
            invokestatic com.oracle.svm.core.c.CGlobalDataFactory.createWord:()Lcom/oracle/svm/core/c/CGlobalData;
            putstatic com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup.baseIsolate:Lcom/oracle/svm/core/c/CGlobalData;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
         0: .line 117
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/core/posix/PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup;

  public void registerIsolate(org.graalvm.nativeimage.Isolate);
    descriptor: (Lorg/graalvm/nativeimage/Isolate;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=2
        start local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
        start local 1 // org.graalvm.nativeimage.Isolate isolate
         0: .line 130
            getstatic com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup.baseIsolate:Lcom/oracle/svm/core/c/CGlobalData;
            invokevirtual com.oracle.svm.core.c.CGlobalData.get:()Lorg/graalvm/word/PointerBase;
            checkcast org.graalvm.word.Pointer
            iconst_0
            invokestatic org.graalvm.word.WordFactory.zero:()Lorg/graalvm/word/WordBase;
            checkcast org.graalvm.nativeimage.Isolate
            aload 1 /* isolate */
            getstatic org.graalvm.word.LocationIdentity.ANY_LOCATION:Lorg/graalvm/word/LocationIdentity;
            invokeinterface org.graalvm.word.Pointer.compareAndSwapWord:(ILorg/graalvm/word/WordBase;Lorg/graalvm/word/WordBase;Lorg/graalvm/word/LocationIdentity;)Lorg/graalvm/word/WordBase;
            checkcast org.graalvm.word.PointerBase
            astore 2 /* value */
        start local 2 // org.graalvm.word.PointerBase value
         1: .line 131
            aload 2 /* value */
            invokeinterface org.graalvm.word.PointerBase.isNull:()Z
            ifne 3
         2: .line 132
            getstatic com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup.baseIsolate:Lcom/oracle/svm/core/c/CGlobalData;
            invokevirtual com.oracle.svm.core.c.CGlobalData.get:()Lorg/graalvm/word/PointerBase;
            checkcast org.graalvm.word.Pointer
            iconst_0
            iconst_m1
            invokestatic org.graalvm.word.WordFactory.signed:(I)Lorg/graalvm/word/SignedWord;
            invokeinterface org.graalvm.word.Pointer.writeWord:(ILorg/graalvm/word/WordBase;)V
         3: .line 134
      StackMap locals: org.graalvm.word.PointerBase
      StackMap stack:
            return
        end local 2 // org.graalvm.word.PointerBase value
        end local 1 // org.graalvm.nativeimage.Isolate isolate
        end local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lcom/oracle/svm/core/posix/PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup;
            0    4     1  isolate  Lorg/graalvm/nativeimage/Isolate;
            1    4     2    value  Lorg/graalvm/word/PointerBase;
    RuntimeVisibleAnnotations: 
      com.oracle.svm.core.annotate.Uninterruptible(reason = "Called from uninterruptible method")
    MethodParameters:
         Name  Flags
      isolate  

  public org.graalvm.nativeimage.Isolate getIsolate();
    descriptor: ()Lorg/graalvm/nativeimage/Isolate;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
         0: .line 138
            getstatic com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup.baseIsolate:Lcom/oracle/svm/core/c/CGlobalData;
            invokevirtual com.oracle.svm.core.c.CGlobalData.get:()Lorg/graalvm/word/PointerBase;
            checkcast org.graalvm.word.Pointer
            iconst_0
            invokeinterface org.graalvm.word.Pointer.readWord:(I)Lorg/graalvm/word/WordBase;
            checkcast org.graalvm.nativeimage.Isolate
            areturn
        end local 0 // com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/core/posix/PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup;
    RuntimeVisibleAnnotations: 
      com.oracle.svm.core.annotate.Uninterruptible(reason = "Called from uninterruptible method")
}
SourceFile: "PosixSubstrateSegfaultHandler.java"
NestHost: com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler
InnerClasses:
  public abstract IsolateCreationWatcher = com.oracle.svm.core.graal.snippets.CEntryPointSnippets$IsolateCreationWatcher of com.oracle.svm.core.graal.snippets.CEntryPointSnippets
  SingleIsolateSegfaultIsolateSetup = com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler$SingleIsolateSegfaultIsolateSetup of com.oracle.svm.core.posix.PosixSubstrateSegfaultHandler