Package com.offbynull.coroutines.instrumenter

Class LocalsStateGenerators

java.lang.Object

com.offbynull.coroutines.instrumenter.LocalsStateGenerators

final class LocalsStateGenerators
extends Object

Utility class to generate bytecode instructions that save/load the local variables table.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	LocalsStateGenerators()

Method Summary

Modifier and Type	Method	Description
static StorageSizes	computeSizes(org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)	Compute sizes required for the storage arrays that will contain the local variables table at this frame.
static org.objectweb.asm.tree.InsnList	loadLocals(DebugGenerators.MarkerType markerType, StorageVariables storageVars, org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)	Generates instructions to load the local variables table.
static org.objectweb.asm.tree.InsnList	saveLocals(DebugGenerators.MarkerType markerType, StorageVariables storageVars, org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)	Generates instructions to save the local variables table.

Methods inherited from class java.lang.Object

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

Constructor Details

LocalsStateGenerators

private LocalsStateGenerators()

Method Details

loadLocals

public static org.objectweb.asm.tree.InsnList loadLocals(DebugGenerators.MarkerType markerType,
 StorageVariables storageVars,
 org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)

Generates instructions to load the local variables table.

Parameters:

markerType - debug marker type

storageVars - variables to load locals from

frame - execution frame at the instruction for which the local variables table is to be restored

Returns:

instructions to load the local variables table from an array

Throws:

NullPointerException - if any argument is null

saveLocals

public static org.objectweb.asm.tree.InsnList saveLocals(DebugGenerators.MarkerType markerType,
 StorageVariables storageVars,
 org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)

Generates instructions to save the local variables table.

Parameters:

markerType - debug marker type

storageVars - variables to store locals in to

frame - execution frame at the instruction where the local variables table is to be saved

Returns:

instructions to save the local variables table in to an array

Throws:

NullPointerException - if any argument is null

computeSizes

public static StorageSizes computeSizes(org.objectweb.asm.tree.analysis.Frame<org.objectweb.asm.tree.analysis.BasicValue> frame)

Compute sizes required for the storage arrays that will contain the local variables table at this frame.

Parameters:

frame - frame to compute for

Returns:

size required by each storage array

Throws:

NullPointerException - if any argument is null