com.google.gwt.dev.asm.commons

Class CodeSizeEvaluator

java.lang.Object

com.google.gwt.dev.asm.MethodVisitor

com.google.gwt.dev.asm.commons.CodeSizeEvaluator

All Implemented Interfaces:

Opcodes

public class CodeSizeEvaluator
extends MethodVisitor
implements Opcodes

A MethodVisitor that can be used to approximate method size.

Author:

Eugene Kuleshov

Field Summary

Fields inherited from class com.google.gwt.dev.asm.MethodVisitor

api, mv

Fields inherited from interface com.google.gwt.dev.asm.Opcodes

AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM4, 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, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CodeSizeEvaluator(int api, MethodVisitor mv)
	CodeSizeEvaluator(MethodVisitor mv)

Method Summary

Modifier and Type	Method and Description
int	getMaxSize()
int	getMinSize()
void	visitFieldInsn(int opcode, String owner, String name, String desc) Visits a field instruction.
void	visitIincInsn(int var, int increment) Visits an IINC instruction.
void	visitInsn(int opcode) Visits a zero operand instruction.
void	visitIntInsn(int opcode, int operand) Visits an instruction with a single int operand.
void	visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) Visits an invokedynamic instruction.
void	visitJumpInsn(int opcode, Label label) Visits a jump instruction.
void	visitLdcInsn(Object cst) Visits a LDC instruction.
void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Visits a LOOKUPSWITCH instruction.
void	visitMethodInsn(int opcode, String owner, String name, String desc) Visits a method instruction.
void	visitMultiANewArrayInsn(String desc, int dims) Visits a MULTIANEWARRAY instruction.
void	visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) Visits a TABLESWITCH instruction.
void	visitTypeInsn(int opcode, String type) Visits a type instruction.
void	visitVarInsn(int opcode, int var) Visits a local variable instruction.

Methods inherited from class com.google.gwt.dev.asm.MethodVisitor

visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFrame, visitLabel, visitLineNumber, visitLocalVariable, visitMaxs, visitParameterAnnotation, visitTryCatchBlock

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, toString

Constructor Detail

CodeSizeEvaluator

public CodeSizeEvaluator(MethodVisitor mv)

CodeSizeEvaluator

protected CodeSizeEvaluator(int api,
                            MethodVisitor mv)

Method Detail

getMinSize

public int getMinSize()

getMaxSize

public int getMaxSize()

visitInsn

public void visitInsn(int opcode)

Description copied from class: MethodVisitor

Visits a zero operand instruction.

Overrides:

visitInsn in class MethodVisitor

Parameters:

opcode - the opcode of the instruction to be visited. This opcode is either NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, 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, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.

visitIntInsn

public void visitIntInsn(int opcode,
                         int operand)

Description copied from class: MethodVisitor

Visits an instruction with a single int operand.

Overrides:

visitIntInsn in class MethodVisitor

Parameters:

opcode - the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH or NEWARRAY.

operand - the operand of the instruction to be visited.
When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
When opcode is NEWARRAY, operand value should be one of Opcodes.T_BOOLEAN, Opcodes.T_CHAR, Opcodes.T_FLOAT, Opcodes.T_DOUBLE, Opcodes.T_BYTE, Opcodes.T_SHORT, Opcodes.T_INT or Opcodes.T_LONG.

visitVarInsn

public void visitVarInsn(int opcode,
                         int var)

Description copied from class: MethodVisitor

Visits a local variable instruction. A local variable instruction is an instruction that loads or stores the value of a local variable.

Overrides:

visitVarInsn in class MethodVisitor

Parameters:

opcode - the opcode of the local variable instruction to be visited. This opcode is either ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.

var - the operand of the instruction to be visited. This operand is the index of a local variable.

visitTypeInsn

public void visitTypeInsn(int opcode,
                          String type)

Description copied from class: MethodVisitor

Visits a type instruction. A type instruction is an instruction that takes the internal name of a class as parameter.

Overrides:

visitTypeInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either NEW, ANEWARRAY, CHECKCAST or INSTANCEOF.

type - the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see getInternalName).

visitFieldInsn

public void visitFieldInsn(int opcode,
                           String owner,
                           String name,
                           String desc)

Description copied from class: MethodVisitor

Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object.

Overrides:

visitFieldInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.

owner - the internal name of the field's owner class (see getInternalName).

name - the field's name.

desc - the field's descriptor (see Type).

visitMethodInsn

public void visitMethodInsn(int opcode,
                            String owner,
                            String name,
                            String desc)

Description copied from class: MethodVisitor

Visits a method instruction. A method instruction is an instruction that invokes a method.

Overrides:

visitMethodInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.

owner - the internal name of the method's owner class (see getInternalName).

name - the method's name.

desc - the method's descriptor (see Type).

visitInvokeDynamicInsn

public void visitInvokeDynamicInsn(String name,
                                   String desc,
                                   Handle bsm,
                                   Object... bsmArgs)

Description copied from class: MethodVisitor

Visits an invokedynamic instruction.

Overrides:

visitInvokeDynamicInsn in class MethodVisitor

Parameters:

name - the method's name.

desc - the method's descriptor (see Type).

bsm - the bootstrap method.

bsmArgs - the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type or Handle value. This method is allowed to modify the content of the array so a caller should expect that this array may change.

visitJumpInsn

public void visitJumpInsn(int opcode,
                          Label label)

Description copied from class: MethodVisitor

Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.

Overrides:

visitJumpInsn in class MethodVisitor

Parameters:

opcode - the opcode of the type instruction to be visited. This opcode is either IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.

label - the operand of the instruction to be visited. This operand is a label that designates the instruction to which the jump instruction may jump.

visitLdcInsn

public void visitLdcInsn(Object cst)

Description copied from class: MethodVisitor

Visits a LDC instruction. Note that new constant types may be added in future versions of the Java Virtual Machine. To easily detect new constant types, implementations of this method should check for unexpected constant types, like this:

 if (cst instanceof Integer) {
     // ...
 } else if (cst instanceof Float) {
     // ...
 } else if (cst instanceof Long) {
     // ...
 } else if (cst instanceof Double) {
     // ...
 } else if (cst instanceof String) {
     // ...
 } else if (cst instanceof Type) {
     int sort = ((Type) cst).getSort();
     if (sort == Type.OBJECT) {
         // ...
     } else if (sort == Type.ARRAY) {
         // ...
     } else if (sort == Type.METHOD) {
         // ...
     } else {
         // throw an exception
     }
 } else if (cst instanceof Handle) {
     // ...
 } else {
     // throw an exception
 }
 

Overrides:

visitLdcInsn in class MethodVisitor

Parameters:

cst - the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double, a String, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49.0, a Type of METHOD sort or a Handle for MethodType and MethodHandle constants, for classes whose version is 51.0.

visitIincInsn

public void visitIincInsn(int var,
                          int increment)

Description copied from class: MethodVisitor

Visits an IINC instruction.

Overrides:

visitIincInsn in class MethodVisitor

Parameters:

var - index of the local variable to be incremented.

increment - amount to increment the local variable by.

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                                 int max,
                                 Label dflt,
                                 Label... labels)

Description copied from class: MethodVisitor

Visits a TABLESWITCH instruction.

Overrides:

visitTableSwitchInsn in class MethodVisitor

Parameters:

min - the minimum key value.

max - the maximum key value.

dflt - beginning of the default handler block.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the min + i key.

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                                  int[] keys,
                                  Label[] labels)

Description copied from class: MethodVisitor

Visits a LOOKUPSWITCH instruction.

Overrides:

visitLookupSwitchInsn in class MethodVisitor

Parameters:

dflt - beginning of the default handler block.

keys - the values of the keys.

labels - beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String desc,
                                    int dims)

Description copied from class: MethodVisitor

Visits a MULTIANEWARRAY instruction.

Overrides:

visitMultiANewArrayInsn in class MethodVisitor

Parameters:

desc - an array type descriptor (see Type).

dims - number of dimensions of the array to allocate.