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java.lang.Objectorg.objectweb.asm.MethodAdapter
org.objectweb.asm.commons.AnalyzerAdapter
public class AnalyzerAdapter
A MethodAdapter that keeps track of stack map frame changes between
visitFrame calls. This
adapter must be used with the
ClassReader.EXPAND_FRAMES option. Each visitX
instruction delegates to the next visitor in the chain, if any, and then
simulates the effect of this instruction on the stack map frame, represented
by locals and stack. The next visitor in the chain can get
the state of the stack map frame before each instruction by reading
the value of these fields in its visitX methods (this requires a
reference to the AnalyzerAdapter that is before it in the chain).
If this adapter is used with a class that does not contain stack map table
attributes (i.e., pre Java 6 classes) then this adapter may not be able to
compute the stack map frame for each instruction. In this case no exception
is thrown but the locals and stack fields will be null for
these instructions.
| Field Summary | |
|---|---|
List |
locals
List of the local variable slots for current execution
frame. |
List |
stack
List of the operand stack slots for current execution
frame. |
Map |
uninitializedTypes
Information about uninitialized types in the current execution frame. |
| Fields inherited from class org.objectweb.asm.MethodAdapter |
|---|
mv |
| Constructor Summary | |
|---|---|
AnalyzerAdapter(String owner,
int access,
String name,
String desc,
MethodVisitor mv)
Creates a new AnalyzerAdapter. |
|
| Method Summary | |
|---|---|
void |
visitFieldInsn(int opcode,
String owner,
String name,
String desc)
Visits a field instruction. |
void |
visitFrame(int type,
int nLocal,
Object[] local,
int nStack,
Object[] stack)
Visits the current state of the local variables and operand stack elements. |
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 |
visitJumpInsn(int opcode,
Label label)
Visits a jump instruction. |
void |
visitLabel(Label label)
Visits a label. |
void |
visitLdcInsn(Object cst)
Visits a LDC instruction. |
void |
visitLookupSwitchInsn(Label dflt,
int[] keys,
Label[] labels)
Visits a LOOKUPSWITCH instruction. |
void |
visitMaxs(int maxStack,
int maxLocals)
Visits the maximum stack size and the maximum number of local variables of the method. |
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 org.objectweb.asm.MethodAdapter |
|---|
visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitLineNumber, visitLocalVariable, visitParameterAnnotation, visitTryCatchBlock |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public List locals
List of the local variable slots for current execution
frame. Primitive types are represented by Opcodes.TOP,
Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG,
Opcodes.DOUBLE,Opcodes.NULL or
Opcodes.UNINITIALIZED_THIS (long and double are represented by a
two elements, the second one being TOP). Reference types are represented
by String objects (representing internal names), and uninitialized types
by Label objects (this label designates the NEW instruction that created
this uninitialized value). This field is null for unreacheable
instructions.
public List stack
List of the operand stack slots for current execution
frame. Primitive types are represented by Opcodes.TOP,
Opcodes.INTEGER, Opcodes.FLOAT, Opcodes.LONG,
Opcodes.DOUBLE,Opcodes.NULL or
Opcodes.UNINITIALIZED_THIS (long and double are represented by a
two elements, the second one being TOP). Reference types are represented
by String objects (representing internal names), and uninitialized types
by Label objects (this label designates the NEW instruction that created
this uninitialized value). This field is null for unreacheable
instructions.
public Map uninitializedTypes
| Constructor Detail |
|---|
public AnalyzerAdapter(String owner,
int access,
String name,
String desc,
MethodVisitor mv)
AnalyzerAdapter.
owner - the owner's class name.access - the method's access flags (see Opcodes).name - the method's name.desc - the method's descriptor (see Type).mv - the method visitor to which this adapter delegates calls. May
be null.| Method Detail |
|---|
public void visitFrame(int type,
int nLocal,
Object[] local,
int nStack,
Object[] stack)
MethodVisitorV1_6. Opcodes.F_SAME representing frame with exactly the same
locals as the previous frame and with the empty stack.Opcodes.F_SAME1
representing frame with exactly the same locals as the previous frame and
with single value on the stack (nStack is 1 and
stack[0] contains value for the type of the stack item).Opcodes.F_APPEND representing frame with current locals are
the same as the locals in the previous frame, except that additional
locals are defined (nLocal is 1, 2 or 3 and
local elements contains values representing added types).Opcodes.F_CHOP representing frame with current locals are
the same as the locals in the previous frame, except that the last 1-3
locals are absent and with the empty stack (nLocals is 1,
2 or 3). Opcodes.F_FULL representing complete frame
data.
visitFrame in interface MethodVisitorvisitFrame in class MethodAdaptertype - the type of this stack map frame. Must be
Opcodes.F_NEW for expanded frames, or
Opcodes.F_FULL, Opcodes.F_APPEND,
Opcodes.F_CHOP, Opcodes.F_SAME or
Opcodes.F_APPEND, Opcodes.F_SAME1 for compressed
frames.nLocal - the number of local variables in the visited frame.local - the local variable types in this frame. This array must not
be modified. Primitive types are represented by
Opcodes.TOP, Opcodes.INTEGER,
Opcodes.FLOAT, Opcodes.LONG,
Opcodes.DOUBLE,Opcodes.NULL or
Opcodes.UNINITIALIZED_THIS (long and double are
represented by a single element). Reference types are represented
by String objects (representing internal names), and uninitialized
types by Label objects (this label designates the NEW instruction
that created this uninitialized value).nStack - the number of operand stack elements in the visited frame.stack - the operand stack types in this frame. This array must not
be modified. Its content has the same format as the "local" array.public void visitInsn(int opcode)
MethodVisitor
visitInsn in interface MethodVisitorvisitInsn in class MethodAdapteropcode - 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.
public void visitIntInsn(int opcode,
int operand)
MethodVisitor
visitIntInsn in interface MethodVisitorvisitIntInsn in class MethodAdapteropcode - 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.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.
public void visitVarInsn(int opcode,
int var)
MethodVisitor
visitVarInsn in interface MethodVisitorvisitVarInsn in class MethodAdapteropcode - 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.
public void visitTypeInsn(int opcode,
String type)
MethodVisitor
visitTypeInsn in interface MethodVisitorvisitTypeInsn in class MethodAdapteropcode - 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).
public void visitFieldInsn(int opcode,
String owner,
String name,
String desc)
MethodVisitor
visitFieldInsn in interface MethodVisitorvisitFieldInsn in class MethodAdapteropcode - 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).
public void visitMethodInsn(int opcode,
String owner,
String name,
String desc)
MethodVisitor
visitMethodInsn in interface MethodVisitorvisitMethodInsn in class MethodAdapteropcode - the opcode of the type instruction to be visited. This
opcode is either INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC,
INVOKEINTERFACE or INVOKEDYNAMIC.owner - the internal name of the method's owner class (see getInternalName)
or Opcodes.INVOKEDYNAMIC_OWNER.name - the method's name.desc - the method's descriptor (see Type).
public void visitJumpInsn(int opcode,
Label label)
MethodVisitor
visitJumpInsn in interface MethodVisitorvisitJumpInsn in class MethodAdapteropcode - 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.public void visitLabel(Label label)
MethodVisitor
visitLabel in interface MethodVisitorvisitLabel in class MethodAdapterlabel - a Label object.public void visitLdcInsn(Object cst)
MethodVisitor
visitLdcInsn in interface MethodVisitorvisitLdcInsn in class MethodAdaptercst - the constant to be loaded on the stack. This parameter must be
a non null Integer, a Float, a Long, a
Double a String (or a Type for
.class constants, for classes whose version is 49.0 or
more).
public void visitIincInsn(int var,
int increment)
MethodVisitor
visitIincInsn in interface MethodVisitorvisitIincInsn in class MethodAdaptervar - index of the local variable to be incremented.increment - amount to increment the local variable by.
public void visitTableSwitchInsn(int min,
int max,
Label dflt,
Label[] labels)
MethodVisitor
visitTableSwitchInsn in interface MethodVisitorvisitTableSwitchInsn in class MethodAdaptermin - 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.
public void visitLookupSwitchInsn(Label dflt,
int[] keys,
Label[] labels)
MethodVisitor
visitLookupSwitchInsn in interface MethodVisitorvisitLookupSwitchInsn in class MethodAdapterdflt - 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.
public void visitMultiANewArrayInsn(String desc,
int dims)
MethodVisitor
visitMultiANewArrayInsn in interface MethodVisitorvisitMultiANewArrayInsn in class MethodAdapterdesc - an array type descriptor (see Type).dims - number of dimensions of the array to allocate.
public void visitMaxs(int maxStack,
int maxLocals)
MethodVisitor
visitMaxs in interface MethodVisitorvisitMaxs in class MethodAdaptermaxStack - maximum stack size of the method.maxLocals - maximum number of local variables for the method.
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