Package org.spongepowered.asm.mixin.injection.points

Class AfterInvoke

java.lang.Object

org.spongepowered.asm.mixin.injection.InjectionPoint

org.spongepowered.asm.mixin.injection.points.BeforeInvoke

org.spongepowered.asm.mixin.injection.points.AfterInvoke

public class AfterInvoke
extends BeforeInvoke

This injection point searches for INVOKEVIRTUAL, INVOKESTATIC and INVOKESPECIAL opcodes matching its arguments and returns a list of insns after the matching instructions, with special handling for methods invocations which return a value and immediately assign it to a local variable. It accepts the following parameters from At:

target

A Target Selector which identifies the target method

ordinal

The ordinal position of the method invocation to match. For example if the method is invoked 3 times and you want to match the 3rd then you can specify an ordinal of 2 (ordinals are zero-indexed). The default value is -1 which supresses ordinal matching

named argument: fuzz

By default, the injection point inspects only the instruction immediately following the matched invocation and will match store instructions. Specifying a higher fuzz increases the search range, skipping instructions as necessary to find a matching store opcode.

named argument: skip

When fuzz is specified, a default list of skippable opcodes is used. The list of skippable opcodes can be overridden by specifying a list of opcodes (numeric values or constant names from Opcodes can be used). This can be used to restrict the fuzz behaviour to consume only expected opcodes (eg. CHECKCAST). Note that store opcodes cannot be skipped and specifying them has no effect.

Example:

   @At(value = "INVOKE_ASSIGN", target="func_1234_a(III)J")

Note that unlike other standard injection points, this class matches the insn after the invocation, and after any local variable assignment. Use the shift specifier to adjust the matched opcode as necessary.

Nested Class Summary

Nested classes/interfaces inherited from class org.spongepowered.asm.mixin.injection.points.BeforeInvoke

BeforeInvoke.SearchType

Nested classes/interfaces inherited from class org.spongepowered.asm.mixin.injection.InjectionPoint

InjectionPoint.AtCode, InjectionPoint.Flags, InjectionPoint.RestrictTargetLevel, InjectionPoint.Specifier

Field Summary

Fields

Modifier and Type	Field	Description
static final int[]	DEFAULT_SKIP	Default opcodes which are eligible to be skipped (see named argument skip above) if named argument fuzz is increased beyond the default value of 1.

Fields inherited from class org.spongepowered.asm.mixin.injection.points.BeforeInvoke

allowPermissive, className, context, logger, mixin, ordinal, target

Fields inherited from class org.spongepowered.asm.mixin.injection.InjectionPoint

DEFAULT_ALLOWED_SHIFT_BY, MAX_ALLOWED_SHIFT_BY

Constructor Summary

Constructors

Constructor	Description
AfterInvoke(InjectionPointData data)

Method Summary

Modifier and Type	Method	Description
protected boolean	addInsn(org.objectweb.asm.tree.InsnList insns, Collection<org.objectweb.asm.tree.AbstractInsnNode> nodes, org.objectweb.asm.tree.AbstractInsnNode insn)

Methods inherited from class org.spongepowered.asm.mixin.injection.points.BeforeInvoke

find, find, inspectInsn, log, matchesInsn, matchesOrdinal, setLogging

Methods inherited from class org.spongepowered.asm.mixin.injection.InjectionPoint

addMessage, after, and, before, checkPriority, getAtCode, getId, getSlice, getSpecifier, getTargetRestriction, nextNode, or, parse, parse, parse, parse, parse, parse, parse, parse, register, register, setTargetRestriction, shift, toString

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_SKIP

public static final int[] DEFAULT_SKIP

Default opcodes which are eligible to be skipped (see named argument skip above) if named argument fuzz is increased beyond the default value of 1.

Skipped opcodes: DUP, IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, CHECKCAST, INSTANCEOF

Constructor Details

AfterInvoke

public AfterInvoke(InjectionPointData data)

Method Details

addInsn

protected boolean addInsn(org.objectweb.asm.tree.InsnList insns,
 Collection<org.objectweb.asm.tree.AbstractInsnNode> nodes,
 org.objectweb.asm.tree.AbstractInsnNode insn)

Overrides:

addInsn in class BeforeInvoke