Class Ek9MethodKindsAttribute

java.lang.Object

org.objectweb.asm.Attribute

org.ek9lang.compiler.backend.jvm.support.Ek9MethodKindsAttribute

public final class Ek9MethodKindsAttribute
extends org.objectweb.asm.Attribute

The versioned Ek9MethodKinds class attribute (C.2): a per-method map of (name, descriptor) -> Ek9MethodKind + MethodDebugPolicy bitset, letting the EK9 debug semantics layer decide step-filtering and frame re-presentation. One attribute per generated class. See docs/strategic/EK9_DEBUGGER_STRATEGY.md §18.3.

Keyed by name AND descriptor - name alone is ambiguous (_eq(MyType) vs _eq(Any), enum comparison overloads, hashCode(), bodied vs bodyless _call). Entries reference the constant pool (ClassWriter.newUTF8(String)), so each is 6 bytes (2+2+1+1) and adds near-zero bloat. The JVM ignores unknown class attributes (JVMS §4.7.1), so this is invisible at run time; the debugger parses it by registering an instance of this class as an ASM Attribute prototype on the ClassReader.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	Ek9MethodKindsAttribute.Entry	One per-method record: the method (name, descriptor), the Ek9MethodKind wire kindCode, and its MethodDebugPolicy bitset.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	FORMAT_VERSION
static final String	NAME

Fields inherited from class org.objectweb.asm.Attribute

type

Constructor Summary

Constructors

Constructor	Description
Ek9MethodKindsAttribute()	Prototype constructor used by ASM's ClassReader to recognise and parse the attribute.
Ek9MethodKindsAttribute(List<Ek9MethodKindsAttribute.Entry> entries)

Method Summary

Modifier and Type	Method	Description
List<Ek9MethodKindsAttribute.Entry>	entries()
int	formatVersion()
protected org.objectweb.asm.Attribute	read(org.objectweb.asm.ClassReader classReader, int offset, int length, char[] charBuffer, int codeAttributeOffset, org.objectweb.asm.Label[] labels)
protected org.objectweb.asm.ByteVector	write(org.objectweb.asm.ClassWriter classWriter, byte[] code, int codeLength, int maxStack, int maxLocals)

Methods inherited from class org.objectweb.asm.Attribute

getLabels, isCodeAttribute, isUnknown, read, readLabel, write

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

FORMAT_VERSION

public static final int FORMAT_VERSION

See Also:

• Constant Field Values

Constructor Details

Ek9MethodKindsAttribute

public Ek9MethodKindsAttribute()

Prototype constructor used by ASM's ClassReader to recognise and parse the attribute.

Ek9MethodKindsAttribute

public Ek9MethodKindsAttribute(List<Ek9MethodKindsAttribute.Entry> entries)

Method Details

entries

public List<Ek9MethodKindsAttribute.Entry> entries()

formatVersion

public int formatVersion()

write

protected org.objectweb.asm.ByteVector write(org.objectweb.asm.ClassWriter classWriter,
 byte[] code,
 int codeLength,
 int maxStack,
 int maxLocals)

Overrides:

write in class org.objectweb.asm.Attribute

read

protected org.objectweb.asm.Attribute read(org.objectweb.asm.ClassReader classReader,
 int offset,
 int length,
 char[] charBuffer,
 int codeAttributeOffset,
 org.objectweb.asm.Label[] labels)

Overrides:

read in class org.objectweb.asm.Attribute