OpenJDK 27 · jdk.internal.classfile.impl.BlockCodeBuilderImpl

Modifier and Type	Field and Description
private final Label	breakLabel
private final Label	endLabel
private boolean	hasInstructions
private boolean	reachable
private final Label	startLabel
private int	terminalMaxLocals
private int	topLocal

Access	Constructor and Description
public	BlockCodeBuilderImpl(CodeBuilder parent, Label breakLabel)

Method Summary

Modifier and Type	Method and Description
public int	allocateLocal(TypeKind typeKind) Implements java.lang.classfile.CodeBuilder.allocateLocal. Returns the local variable slot of a fresh local variable.
public Label	breakLabel() Implements java.lang.classfile.CodeBuilder.BlockCodeBuilder.breakLabel. Returns the label locating where control is passed back to the parent block.
public void	end()
public Label	endLabel() Implements java.lang.classfile.CodeBuilder.endLabel. Returns the label associated with the end of the current block.
public boolean	isEmpty()
public boolean	reachable()
public void	start()
public Label	startLabel() Implements java.lang.classfile.CodeBuilder.startLabel. Returns the label associated with the beginning of the current block.
private int	topLocal(CodeBuilder parent)
public CodeBuilder	with(CodeElement element) Implements java.lang.classfile.ClassFileBuilder.with. Integrates the member element into the structure being built.

Inherited from jdk.internal.classfile.impl.NonterminalCodeBuilder:: constantPool findTerminal newLabel parameterSlot receiverSlot

breakLabel	back to summary
private final Label breakLabel

endLabel	back to summary
private final Label endLabel

hasInstructions	back to summary
private boolean hasInstructions

reachable	back to summary
private boolean reachable

startLabel	back to summary
private final Label startLabel

terminalMaxLocals	back to summary
private int terminalMaxLocals

topLocal	back to summary
private int topLocal

BlockCodeBuilderImpl	back to summary
public BlockCodeBuilderImpl(CodeBuilder parent, Label breakLabel)

Method Detail

allocateLocal back to summary

allocateLocal	back to summary
public int allocateLocal(TypeKind typeKind) Implements java.lang.classfile.CodeBuilder.allocateLocal. Doc from java.lang.classfile.CodeBuilder.allocateLocal. Returns the local variable slot of a fresh local variable. This method makes reasonable efforts to determine which slots are in use and which are not. When transforming a method, fresh locals begin at the `maxLocals` of the original method. For a method being built directly, fresh locals begin after the last parameter slot. If the current code builder is a `BlockCodeBuilder`, at the end of the block, locals are reset to their value at the beginning of the block. Annotations @Override

public int allocateLocal(TypeKind typeKind)

Implements java.lang.classfile.CodeBuilder.allocateLocal.

Doc from java.lang.classfile.CodeBuilder.allocateLocal.

Returns the local variable slot of a fresh local variable. This method makes reasonable efforts to determine which slots are in use and which are not. When transforming a method, fresh locals begin at the maxLocals of the original method. For a method being built directly, fresh locals begin after the last parameter slot.

If the current code builder is a BlockCodeBuilder, at the end of the block, locals are reset to their value at the beginning of the block.

Annotations

@Override

breakLabel	back to summary
public Label breakLabel() Implements java.lang.classfile.CodeBuilder.BlockCodeBuilder.breakLabel. Doc from java.lang.classfile.CodeBuilder.BlockCodeBuilder.breakLabel. Returns the label locating where control is passed back to the parent block. A branch to this label "break"'s out of the current block. If the last instruction in this block does not lead to the break label, Class-File API may append instructions to target the "break" label to the built block. Annotations @Override

breakLabel

back to summary

public Label breakLabel()

Implements java.lang.classfile.CodeBuilder.BlockCodeBuilder.breakLabel.

Doc from java.lang.classfile.CodeBuilder.BlockCodeBuilder.breakLabel.

Returns the label locating where control is passed back to the parent block. A branch to this label "break"'s out of the current block.

If the last instruction in this block does not lead to the break label, Class-File API may append instructions to target the "break" label to the built block.

Annotations

@Override

end	back to summary
public void end()

endLabel back to summary

endLabel	back to summary
public Label endLabel() Implements java.lang.classfile.CodeBuilder.endLabel. Doc from java.lang.classfile.CodeBuilder.endLabel. Returns the label associated with the end of the current block. If this builder is not a "block" builder, such as those provided by `block(Consumer)` or `ifThenElse(Consumer, Consumer)`, the current block will be the entire method body. Annotations @Override

public Label endLabel()

Implements java.lang.classfile.CodeBuilder.endLabel.

Doc from java.lang.classfile.CodeBuilder.endLabel.

Returns the label associated with the end of the current block. If this builder is not a "block" builder, such as those provided by block(Consumer) or ifThenElse(Consumer, Consumer), the current block will be the entire method body.

Annotations

@Override

isEmpty	back to summary
public boolean isEmpty()

reachable	back to summary
public boolean reachable()

start	back to summary
public void start()

startLabel back to summary

startLabel	back to summary
public Label startLabel() Implements java.lang.classfile.CodeBuilder.startLabel. Doc from java.lang.classfile.CodeBuilder.startLabel. Returns the label associated with the beginning of the current block. If this builder is not a "block" builder, such as those provided by `block(Consumer)` or `ifThenElse(Consumer, Consumer)`, the current block will be the entire method body. Annotations @Override

public Label startLabel()

Implements java.lang.classfile.CodeBuilder.startLabel.

Doc from java.lang.classfile.CodeBuilder.startLabel.

Returns the label associated with the beginning of the current block. If this builder is not a "block" builder, such as those provided by block(Consumer) or ifThenElse(Consumer, Consumer), the current block will be the entire method body.

Annotations

@Override

topLocal	back to summary
private int topLocal(CodeBuilder parent)

with	back to summary
public CodeBuilder with(CodeElement element) Implements java.lang.classfile.ClassFileBuilder.with. Doc from java.lang.classfile.ClassFileBuilder.with. Integrates the member element into the structure being built. Annotations @Override

with

back to summary

public CodeBuilder with(CodeElement element)

Implements java.lang.classfile.ClassFileBuilder.with.

Doc from java.lang.classfile.ClassFileBuilder.with.

Integrates the member element into the structure being built.

Annotations

@Override

public final Class BlockCodeBuilderImpl

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail