Package ftbsc.lll.utils

Class StackUtils

java.lang.Object

ftbsc.lll.utils.StackUtils

All Implemented Interfaces:

org.objectweb.asm.Opcodes

public class StackUtils
extends java.lang.Object
implements org.objectweb.asm.Opcodes

Various methods for manipulating the stack. Includes anything from instantiation to variable manipulation - just about anything that loads stuff on or from the stack.

Field Summary

Fields inherited from interface org.objectweb.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V9

Constructor Summary

Constructors

Constructor	Description
StackUtils()

Method Summary

Modifier and Type	Method	Description
static int	addLocalVariable(org.objectweb.asm.tree.MethodNode method, java.lang.String name, java.lang.String desc)	Creates a new local variable, lasting in scope from the first to the last label of the given method.
static int	addLocalVariable(org.objectweb.asm.tree.MethodNode method, java.lang.String name, java.lang.String desc, org.objectweb.asm.tree.LabelNode start, org.objectweb.asm.tree.LabelNode end)	Creates a new local variable, lasting in scope between two given LabelNodes.
static int	findFirstFreeIndex(org.objectweb.asm.tree.MethodNode method)	Finds the first free index in the given MethodNode.
static org.objectweb.asm.tree.InsnList	instantiate(java.lang.String name, java.lang.String desc, org.objectweb.asm.tree.AbstractInsnNode... args)	Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load the parameters.
static org.objectweb.asm.tree.InsnList	instantiate(java.lang.String name, java.lang.String desc, org.objectweb.asm.tree.InsnList args)	Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load the parameters.

Methods inherited from class java.lang.Object

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

Constructor Detail

StackUtils

public StackUtils()

Method Detail

instantiate

public static org.objectweb.asm.tree.InsnList instantiate(java.lang.String name,
                                                          java.lang.String desc,
                                                          org.objectweb.asm.tree.AbstractInsnNode... args)

Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load the parameters. The created object is loaded on the stack.

Parameters:

name - the internal name of the object to initialize, where the internal name of a class is its fully qualified name, where '.' are replaced by '/'

desc - the descriptor of the constructor to call

args - nodes containing instructions to load the constructor arguments, in the right order

Returns:

an instruction list containing the opcodes needed to create the new object and load it on the stack.

instantiate

public static org.objectweb.asm.tree.InsnList instantiate(java.lang.String name,
                                                          java.lang.String desc,
                                                          org.objectweb.asm.tree.InsnList args)

Creates a new instance of an object, given its internal name, constructor descriptor and instructions to load the parameters. The created object is loaded on the stack.

Parameters:

name - the internal name of the object to initialize, where the internal name of a class is its fully qualified name, where '.' are replaced by '/'

desc - the descriptor of the constructor to call

args - a list of instructions loading the constructor arguments onto the stack in the correct order

Returns:

an instruction list containing the opcodes needed to create the new object and load it on the stack.

addLocalVariable

public static int addLocalVariable(org.objectweb.asm.tree.MethodNode method,
                                   java.lang.String name,
                                   java.lang.String desc)

Creates a new local variable, lasting in scope from the first to the last label of the given method.

Parameters:

method - the method for which to declare the local variable

name - the variable's name

desc - the type descriptor for the new variable

Returns:

the index value of the new local variable

addLocalVariable

public static int addLocalVariable(org.objectweb.asm.tree.MethodNode method,
                                   java.lang.String name,
                                   java.lang.String desc,
                                   org.objectweb.asm.tree.LabelNode start,
                                   org.objectweb.asm.tree.LabelNode end)

Creates a new local variable, lasting in scope between two given LabelNodes.

Parameters:

method - the method for which to declare the local variable

name - the variable's name

desc - the type descriptor for the new variable

start - the label at which the variable should enter scope

end - the label at which the variable should go out of scope

Returns:

the index value of the new local variable

findFirstFreeIndex

public static int findFirstFreeIndex(org.objectweb.asm.tree.MethodNode method)

Finds the first free index in the given MethodNode. Used to create variables.

Parameters:

method - the method to look in

Returns:

the found index