Package org.jboss.byteman.agent.adapter
Class RuleGeneratorAdapter
java.lang.Object
org.objectweb.asm.MethodVisitor
org.jboss.byteman.agent.adapter.RuleMethodAdapter
org.jboss.byteman.agent.adapter.RuleGeneratorAdapter
- Direct Known Subclasses:
RuleTriggerMethodAdapter
A modified version of the asm 3.0 GeneratorAdapter class which dispatches calls to methods of
MethodVisitor to this rather than to the encapsulated MethodVisitor instance in field mv.
Doing so gives the current instance a chance to observe all visit operations. Without it
the current instance only sees visit operations invoked directly by previous visitors in
the chain. This is necessary in order for the RuleTriggerAdapter to build a complete CFG
for the method being visited.
As a consequence of the above change this class cannot inherit the methods from LocalVariableSorter
which allow introduction of new local variables. That's not actually much of a loss since the
functionality provided by that class is of limited utility -- it only allows local variables to
be introduced via a prior pipeline stage. Instead this class provides methods to track the number
of locals employed so far and supports temporary introduction and removal of locals inside injected
trigger or handler code. See methods
newLocal(org.objectweb.asm.Type)
, popLocal(int)
,
loadLocal(int)
and storeLocal(int)
.
Another reason to transplant code to this class is because it inherits functionality from
RuleMethodAdapter which is used by RuleCheckAdapter and RuleTriggerAdapter to identify
and classify local variables but provides functionality to modify bytecode which is only
needed by RuleTriggerAdapter. So, the original class would have needed reparenting anyway.-
Nested Class Summary
Nested classes/interfaces inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter
RuleMethodAdapter.LocalVar
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
Constant for themath
method.static final int
Constant for themath
method.private final org.objectweb.asm.Type[]
Argument types of the method visited by this adapter.private static final org.objectweb.asm.Type
private static final org.objectweb.asm.commons.Method
private static final org.objectweb.asm.Type
private static final org.objectweb.asm.commons.Method
private static final org.objectweb.asm.Type
private static final String
static final int
Constant for themath
method.private static final org.objectweb.asm.Type
private static final org.objectweb.asm.commons.Method
static final int
Constant for theifCmp
method.private static final org.objectweb.asm.Type
private static final org.objectweb.asm.commons.Method
static final int
Constant for theifCmp
method.static final int
Constant for theifCmp
method.private static final org.objectweb.asm.commons.Method
private static final org.objectweb.asm.Type
static final int
Constant for theifCmp
method.private int
used to track maximum number of local variable slotsprivate final List
Types of the local variables of the method visited by this adapter.private static final org.objectweb.asm.Type
private static final org.objectweb.asm.commons.Method
static final int
Constant for theifCmp
method.static final int
Constant for themath
method.static final int
Constant for theifCmp
method.static final int
Constant for themath
method.private int
used to track active local variable slotsprivate static final org.objectweb.asm.Type
private static final org.objectweb.asm.Type
static final int
Constant for themath
method.static final int
Constant for themath
method.private final org.objectweb.asm.Type
Return type of the method visited by this adapter.static final int
Constant for themath
method.private static final org.objectweb.asm.Type
static final int
Constant for themath
method.static final int
Constant for themath
method.static final int
Constant for themath
method.static final int
Constant for themath
method.Fields inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter
access, descriptor, localVarsByName, name, rule, transformContext
Fields inherited from class org.objectweb.asm.MethodVisitor
api, mv
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Constructor Summary
ConstructorsConstructorDescriptionRuleGeneratorAdapter
(org.objectweb.asm.MethodVisitor mv, TransformContext transformContext, int access, String name, String desc, Rule rule) Creates a newRuleGeneratorAdapter
. -
Method Summary
Modifier and TypeMethodDescriptionvoid
Generates the instruction to compute the length of an array.void
arrayLoad
(org.objectweb.asm.Type type) Generates the instruction to load an element from an array.void
arrayStore
(org.objectweb.asm.Type type) Generates the instruction to store an element in an array.void
box
(org.objectweb.asm.Type type) Generates the instructions to box the top stack value.void
cast
(org.objectweb.asm.Type from, org.objectweb.asm.Type to) Generates the instructions to cast a numerical value from one type to another.void
catchException
(org.objectweb.asm.Label start, org.objectweb.asm.Label end, org.objectweb.asm.Type exception) Marks the start of an exception handler.void
checkCast
(org.objectweb.asm.Type type) Generates the instruction to check that the top stack value is of the given type.private void
private void
dumpType
(StringBuffer buffer, Object t) void
dup()
Generates a DUP instruction.void
dup2()
Generates a DUP2 instruction.void
dup2X1()
Generates a DUP2_X1 instruction.void
dup2X2()
Generates a DUP2_X2 instruction.void
dupX1()
Generates a DUP_X1 instruction.void
dupX2()
Generates a DUP_X2 instruction.void
Marks the end of the visited method.private void
fieldInsn
(int opcode, org.objectweb.asm.Type ownerType, String name, org.objectweb.asm.Type fieldType) Generates a get field or set field instruction.private int
getArgIndex
(int arg) Returns the index of the given method argument in the frame's local variables array.void
Generates the instruction to push the value of a non static field on the stack.private static String[]
getInternalNames
(org.objectweb.asm.Type[] types) Returns the internal names of the given types.org.objectweb.asm.Type
getLocalType
(int local) void
Generates the instruction to push the value of a static field on the stack.void
goTo
(org.objectweb.asm.Label label) Generates the instruction to jump to the given label.void
ifCmp
(org.objectweb.asm.Type type, int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top two stack values.void
ifICmp
(int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top two integer stack values.void
ifNonNull
(org.objectweb.asm.Label label) Generates the instruction to jump to the given label if the top stack value is not null.void
ifNull
(org.objectweb.asm.Label label) Generates the instruction to jump to the given label if the top stack value is null.void
ifZCmp
(int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top integer stack value with zero.void
iinc
(int local, int amount) Generates the instruction to increment the given local variable.private void
initialise the local slot types array with the types of the method target and parameters.void
instanceOf
(org.objectweb.asm.Type type) Generates the instruction to test if the top stack value is of the given type.void
invokeConstructor
(org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a constructor.void
invokeDynamic
(String name, String desc, org.objectweb.asm.Handle bsm, Object... bsmArgs) Generates an invokedynamic instruction.private void
invokeInsn
(int opcode, org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method, boolean itf) Generates an invoke method instruction.void
invokeInterface
(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke an interface method.void
invokeStatic
(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a static method.void
invokeVirtual
(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a normal method.void
loadArg
(int arg) Generates the instruction to load the given method argument on the stack.void
Generates the instructions to load all the method arguments on the stack, as a single object array.void
loadArgs()
Generates the instructions to load all the method arguments on the stack.void
loadArgs
(int arg, int count) Generates the instructions to load the given method arguments on the stack.private void
loadInsn
(org.objectweb.asm.Type type, int index) Generates the instruction to push a local variable on the stack.void
loadLocal
(int local) load a value onto the stack from a local var slot which can obtained from a call to newLocal or from a lcoal variable table entry.void
loadThis()
Generates the instruction to load 'this' on the stack.org.objectweb.asm.Label
mark()
Marks the current code position with a new label.void
mark
(org.objectweb.asm.Label label) Marks the current code position with the given label.void
math
(int op, org.objectweb.asm.Type type) Generates the instruction to do the specified mathematical or logical operation.void
Generates the instruction to get the monitor of the top stack value.void
Generates the instruction to release the monitor of the top stack value.void
newArray
(org.objectweb.asm.Type type) Generates the instruction to create a new array.void
newInstance
(org.objectweb.asm.Type type) Generates the instruction to create a new object.org.objectweb.asm.Label
newLabel()
Creates a newLabel
.int
newLocal
(org.objectweb.asm.Type valueType) return a new local slot index for a local var not currently in use.void
not()
Generates the instructions to compute the bitwise negation of the top stack value.void
pop()
Generates a POP instruction.void
pop2()
Generates a POP2 instruction.void
popLocal
(int local) free a previously allocated local slotvoid
push
(boolean value) Generates the instruction to push the given value on the stack.void
push
(double value) Generates the instruction to push the given value on the stack.void
push
(float value) Generates the instruction to push the given value on the stack.void
push
(int value) Generates the instruction to push the given value on the stack.void
push
(long value) Generates the instruction to push the given value on the stack.void
Generates the instruction to push the given value on the stack.void
push
(org.objectweb.asm.Handle handle) Generates the instruction to push a handle on the stack.void
push
(org.objectweb.asm.Type value) Generates the instruction to push the given value on the stack.void
Generates the instruction to store the top stack value in a non static field.void
Generates the instruction to store the top stack value in a static field.void
ret
(int local) Generates a RET instruction.void
Generates the instruction to return the top stack value to the caller.void
storeArg
(int arg) Generates the instruction to store the top stack value in the given method argument.private void
storeInsn
(org.objectweb.asm.Type type, int index) Generates the instruction to store the top stack value in a local variable.void
storeLocal
(int local) save a value on the stack to a local var slotvoid
swap()
Generates a SWAP instruction.void
swap
(org.objectweb.asm.Type prev, org.objectweb.asm.Type type) Generates the instructions to swap the top two stack values.void
tableSwitch
(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator) Generates the instructions for a switch statement.void
tableSwitch
(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator, boolean useTable) Generates the instructions for a switch statement.void
Generates the instruction to throw an exception.void
throwException
(org.objectweb.asm.Type type, String msg) Generates the instructions to create and throw an exception.private void
typeInsn
(int opcode, org.objectweb.asm.Type type) Generates a type dependent instruction.void
unbox
(org.objectweb.asm.Type type) Generates the instructions to unbox the top stack value.void
visitFrame
(int type, int nLocal, Object[] local, int nStack, Object[] stack) void
visitMaxs
(int maxStack, int maxLocals) ensure we allow enough room for any extra locals on the stackvoid
visitVarInsn
(int opcode, int var) override this so we can see track which local var slots are in use and avoid overwriting themMethods inherited from class org.jboss.byteman.agent.adapter.RuleMethodAdapter
getTriggerClassName, lookup, visitLocalVariable
Methods inherited from class org.objectweb.asm.MethodVisitor
getDelegate, visitAnnotableParameterCount, visitAnnotation, visitAnnotationDefault, visitAttribute, visitCode, visitEnd, visitFieldInsn, visitIincInsn, visitInsn, visitInsnAnnotation, visitIntInsn, visitInvokeDynamicInsn, visitJumpInsn, visitLabel, visitLdcInsn, visitLineNumber, visitLocalVariableAnnotation, visitLookupSwitchInsn, visitMethodInsn, visitMethodInsn, visitMultiANewArrayInsn, visitParameter, visitParameterAnnotation, visitTableSwitchInsn, visitTryCatchAnnotation, visitTryCatchBlock, visitTypeAnnotation, visitTypeInsn
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Field Details
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CLDESC
- See Also:
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BYTE_TYPE
private static final org.objectweb.asm.Type BYTE_TYPE -
BOOLEAN_TYPE
private static final org.objectweb.asm.Type BOOLEAN_TYPE -
SHORT_TYPE
private static final org.objectweb.asm.Type SHORT_TYPE -
CHARACTER_TYPE
private static final org.objectweb.asm.Type CHARACTER_TYPE -
INTEGER_TYPE
private static final org.objectweb.asm.Type INTEGER_TYPE -
FLOAT_TYPE
private static final org.objectweb.asm.Type FLOAT_TYPE -
LONG_TYPE
private static final org.objectweb.asm.Type LONG_TYPE -
DOUBLE_TYPE
private static final org.objectweb.asm.Type DOUBLE_TYPE -
NUMBER_TYPE
private static final org.objectweb.asm.Type NUMBER_TYPE -
OBJECT_TYPE
private static final org.objectweb.asm.Type OBJECT_TYPE -
BOOLEAN_VALUE
private static final org.objectweb.asm.commons.Method BOOLEAN_VALUE -
CHAR_VALUE
private static final org.objectweb.asm.commons.Method CHAR_VALUE -
INT_VALUE
private static final org.objectweb.asm.commons.Method INT_VALUE -
FLOAT_VALUE
private static final org.objectweb.asm.commons.Method FLOAT_VALUE -
LONG_VALUE
private static final org.objectweb.asm.commons.Method LONG_VALUE -
DOUBLE_VALUE
private static final org.objectweb.asm.commons.Method DOUBLE_VALUE -
ADD
public static final int ADDConstant for themath
method.- See Also:
-
SUB
public static final int SUBConstant for themath
method.- See Also:
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MUL
public static final int MULConstant for themath
method.- See Also:
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DIV
public static final int DIVConstant for themath
method.- See Also:
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REM
public static final int REMConstant for themath
method.- See Also:
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NEG
public static final int NEGConstant for themath
method.- See Also:
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SHL
public static final int SHLConstant for themath
method.- See Also:
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SHR
public static final int SHRConstant for themath
method.- See Also:
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USHR
public static final int USHRConstant for themath
method.- See Also:
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AND
public static final int ANDConstant for themath
method.- See Also:
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OR
public static final int ORConstant for themath
method.- See Also:
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XOR
public static final int XORConstant for themath
method.- See Also:
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EQ
public static final int EQConstant for theifCmp
method.- See Also:
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NE
public static final int NEConstant for theifCmp
method.- See Also:
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LT
public static final int LTConstant for theifCmp
method.- See Also:
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GE
public static final int GEConstant for theifCmp
method.- See Also:
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GT
public static final int GTConstant for theifCmp
method.- See Also:
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LE
public static final int LEConstant for theifCmp
method.- See Also:
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argumentTypes
private final org.objectweb.asm.Type[] argumentTypesArgument types of the method visited by this adapter. -
returnType
private final org.objectweb.asm.Type returnTypeReturn type of the method visited by this adapter. -
localTypes
Types of the local variables of the method visited by this adapter. -
nextLocal
private int nextLocalused to track active local variable slots -
localHighWater
private int localHighWaterused to track maximum number of local variable slots
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Constructor Details
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RuleGeneratorAdapter
public RuleGeneratorAdapter(org.objectweb.asm.MethodVisitor mv, TransformContext transformContext, int access, String name, String desc, Rule rule) Creates a newRuleGeneratorAdapter
.- Parameters:
mv
- the method visitor to which this adapter delegates calls.transformContext
- the current transform contextaccess
- the method's access flags (seeOpcodes
).name
- the method's name.desc
- the method's descriptor (seeType
).rule
- the rule currently being injected
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Method Details
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initLocalTypes
private void initLocalTypes()initialise the local slot types array with the types of the method target and parameters. this is needed because we are only sent an initial frame identifying the local slots which belong to the method if a stackmap table has been included in the bytecode and this is nto always the case. -
getInternalNames
Returns the internal names of the given types.- Parameters:
types
- a set of types.- Returns:
- the internal names of the given types.
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push
public void push(boolean value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
public void push(int value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
public void push(long value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
public void push(float value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
public void push(double value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack. May be null.
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push
public void push(org.objectweb.asm.Type value) Generates the instruction to push the given value on the stack.- Parameters:
value
- the value to be pushed on the stack.
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push
public void push(org.objectweb.asm.Handle handle) Generates the instruction to push a handle on the stack.- Parameters:
handle
- the handle to be pushed on the stack.
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getArgIndex
private int getArgIndex(int arg) Returns the index of the given method argument in the frame's local variables array.- Parameters:
arg
- the index of a method argument.- Returns:
- the index of the given method argument in the frame's local variables array.
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loadInsn
private void loadInsn(org.objectweb.asm.Type type, int index) Generates the instruction to push a local variable on the stack.- Parameters:
type
- the type of the local variable to be loaded.index
- an index in the frame's local variables array.
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storeInsn
private void storeInsn(org.objectweb.asm.Type type, int index) Generates the instruction to store the top stack value in a local variable.- Parameters:
type
- the type of the local variable to be stored.index
- an index in the frame's local variables array.
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loadThis
public void loadThis()Generates the instruction to load 'this' on the stack. -
loadArg
public void loadArg(int arg) Generates the instruction to load the given method argument on the stack.- Parameters:
arg
- the index of a method argument.
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loadArgs
public void loadArgs(int arg, int count) Generates the instructions to load the given method arguments on the stack.- Parameters:
arg
- the index of the first method argument to be loaded.count
- the number of method arguments to be loaded.
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loadArgs
public void loadArgs()Generates the instructions to load all the method arguments on the stack. -
loadArgArray
public void loadArgArray()Generates the instructions to load all the method arguments on the stack, as a single object array. -
storeArg
public void storeArg(int arg) Generates the instruction to store the top stack value in the given method argument.- Parameters:
arg
- the index of a method argument.
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arrayLoad
public void arrayLoad(org.objectweb.asm.Type type) Generates the instruction to load an element from an array.- Parameters:
type
- the type of the array element to be loaded.
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arrayStore
public void arrayStore(org.objectweb.asm.Type type) Generates the instruction to store an element in an array.- Parameters:
type
- the type of the array element to be stored.
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pop
public void pop()Generates a POP instruction. -
pop2
public void pop2()Generates a POP2 instruction. -
dup
public void dup()Generates a DUP instruction. -
dup2
public void dup2()Generates a DUP2 instruction. -
dupX1
public void dupX1()Generates a DUP_X1 instruction. -
dupX2
public void dupX2()Generates a DUP_X2 instruction. -
dup2X1
public void dup2X1()Generates a DUP2_X1 instruction. -
dup2X2
public void dup2X2()Generates a DUP2_X2 instruction. -
swap
public void swap()Generates a SWAP instruction. -
swap
public void swap(org.objectweb.asm.Type prev, org.objectweb.asm.Type type) Generates the instructions to swap the top two stack values.- Parameters:
prev
- type of the top - 1 stack value.type
- type of the top stack value.
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math
public void math(int op, org.objectweb.asm.Type type) Generates the instruction to do the specified mathematical or logical operation.- Parameters:
op
- a mathematical or logical operation. Must be one of ADD, SUB, MUL, DIV, REM, NEG, SHL, SHR, USHR, AND, OR, XOR.type
- the type of the operand(s) for this operation.
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not
public void not()Generates the instructions to compute the bitwise negation of the top stack value. -
iinc
public void iinc(int local, int amount) Generates the instruction to increment the given local variable.- Parameters:
local
- the local variable to be incremented.amount
- the amount by which the local variable must be incremented.
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cast
public void cast(org.objectweb.asm.Type from, org.objectweb.asm.Type to) Generates the instructions to cast a numerical value from one type to another.- Parameters:
from
- the type of the top stack valueto
- the type into which this value must be cast.
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box
public void box(org.objectweb.asm.Type type) Generates the instructions to box the top stack value. This value is replaced by its boxed equivalent on top of the stack.- Parameters:
type
- the type of the top stack value.
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unbox
public void unbox(org.objectweb.asm.Type type) Generates the instructions to unbox the top stack value. This value is replaced by its unboxed equivalent on top of the stack.- Parameters:
type
- the type of the top stack value.
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newLabel
public org.objectweb.asm.Label newLabel()Creates a newLabel
.- Returns:
- a new
Label
.
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mark
public void mark(org.objectweb.asm.Label label) Marks the current code position with the given label.- Parameters:
label
- a label.
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mark
public org.objectweb.asm.Label mark()Marks the current code position with a new label.- Returns:
- the label that was created to mark the current code position.
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ifCmp
public void ifCmp(org.objectweb.asm.Type type, int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top two stack values.- Parameters:
type
- the type of the top two stack values.mode
- how these values must be compared. One of EQ, NE, LT, GE, GT, LE.label
- where to jump if the comparison result is true.
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ifICmp
public void ifICmp(int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top two integer stack values.- Parameters:
mode
- how these values must be compared. One of EQ, NE, LT, GE, GT, LE.label
- where to jump if the comparison result is true.
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ifZCmp
public void ifZCmp(int mode, org.objectweb.asm.Label label) Generates the instructions to jump to a label based on the comparison of the top integer stack value with zero.- Parameters:
mode
- how these values must be compared. One of EQ, NE, LT, GE, GT, LE.label
- where to jump if the comparison result is true.
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ifNull
public void ifNull(org.objectweb.asm.Label label) Generates the instruction to jump to the given label if the top stack value is null.- Parameters:
label
- where to jump if the condition is true.
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ifNonNull
public void ifNonNull(org.objectweb.asm.Label label) Generates the instruction to jump to the given label if the top stack value is not null.- Parameters:
label
- where to jump if the condition is true.
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goTo
public void goTo(org.objectweb.asm.Label label) Generates the instruction to jump to the given label.- Parameters:
label
- where to jump if the condition is true.
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ret
public void ret(int local) Generates a RET instruction.- Parameters:
local
- a local variable identifier, as returned bynewLocal()
.
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tableSwitch
public void tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator) Generates the instructions for a switch statement.- Parameters:
keys
- the switch case keys.generator
- a generator to generate the code for the switch cases.
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tableSwitch
public void tableSwitch(int[] keys, org.objectweb.asm.commons.TableSwitchGenerator generator, boolean useTable) Generates the instructions for a switch statement.- Parameters:
keys
- the switch case keys.generator
- a generator to generate the code for the switch cases.useTable
- true to use a TABLESWITCH instruction, or false to use a LOOKUPSWITCH instruction.
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returnValue
public void returnValue()Generates the instruction to return the top stack value to the caller. -
fieldInsn
private void fieldInsn(int opcode, org.objectweb.asm.Type ownerType, String name, org.objectweb.asm.Type fieldType) Generates a get field or set field instruction.- Parameters:
opcode
- the instruction's opcode.ownerType
- the class in which the field is defined.name
- the name of the field.fieldType
- the type of the field.
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getStatic
Generates the instruction to push the value of a static field on the stack.- Parameters:
owner
- the class in which the field is defined.name
- the name of the field.type
- the type of the field.
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putStatic
Generates the instruction to store the top stack value in a static field.- Parameters:
owner
- the class in which the field is defined.name
- the name of the field.type
- the type of the field.
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getField
Generates the instruction to push the value of a non static field on the stack.- Parameters:
owner
- the class in which the field is defined.name
- the name of the field.type
- the type of the field.
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putField
Generates the instruction to store the top stack value in a non static field.- Parameters:
owner
- the class in which the field is defined.name
- the name of the field.type
- the type of the field.
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invokeInsn
private void invokeInsn(int opcode, org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method, boolean itf) Generates an invoke method instruction.- Parameters:
opcode
- the instruction's opcode.type
- the class in which the method is defined.method
- the method to be invoked.
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invokeVirtual
public void invokeVirtual(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a normal method.- Parameters:
owner
- the class in which the method is defined.method
- the method to be invoked.
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invokeConstructor
public void invokeConstructor(org.objectweb.asm.Type type, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a constructor.- Parameters:
type
- the class in which the constructor is defined.method
- the constructor to be invoked.
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invokeStatic
public void invokeStatic(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke a static method.- Parameters:
owner
- the class in which the method is defined.method
- the method to be invoked.
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invokeInterface
public void invokeInterface(org.objectweb.asm.Type owner, org.objectweb.asm.commons.Method method) Generates the instruction to invoke an interface method.- Parameters:
owner
- the class in which the method is defined.method
- the method to be invoked.
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invokeDynamic
public void invokeDynamic(String name, String desc, org.objectweb.asm.Handle bsm, Object... bsmArgs) Generates an invokedynamic instruction.- Parameters:
name
- the method's name.desc
- the method's descriptor (seeType
).bsm
- the bootstrap method.bsmArgs
- the bootstrap method constant arguments. Each argument must be anInteger
,Float
,Long
,Double
,String
,Type
orHandle
value. This method is allowed to modify the content of the array so a caller should expect that this array may change.
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typeInsn
private void typeInsn(int opcode, org.objectweb.asm.Type type) Generates a type dependent instruction.- Parameters:
opcode
- the instruction's opcode.type
- the instruction's operand.
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newInstance
public void newInstance(org.objectweb.asm.Type type) Generates the instruction to create a new object.- Parameters:
type
- the class of the object to be created.
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newArray
public void newArray(org.objectweb.asm.Type type) Generates the instruction to create a new array.- Parameters:
type
- the type of the array elements.
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arrayLength
public void arrayLength()Generates the instruction to compute the length of an array. -
throwException
public void throwException()Generates the instruction to throw an exception. -
throwException
Generates the instructions to create and throw an exception. The exception class must have a constructor with a single String argument.- Parameters:
type
- the class of the exception to be thrown.msg
- the detailed message of the exception.
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checkCast
public void checkCast(org.objectweb.asm.Type type) Generates the instruction to check that the top stack value is of the given type.- Parameters:
type
- a class or interface type.
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instanceOf
public void instanceOf(org.objectweb.asm.Type type) Generates the instruction to test if the top stack value is of the given type.- Parameters:
type
- a class or interface type.
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monitorEnter
public void monitorEnter()Generates the instruction to get the monitor of the top stack value. -
monitorExit
public void monitorExit()Generates the instruction to release the monitor of the top stack value. -
endMethod
public void endMethod()Marks the end of the visited method. -
catchException
public void catchException(org.objectweb.asm.Label start, org.objectweb.asm.Label end, org.objectweb.asm.Type exception) Marks the start of an exception handler.- Parameters:
start
- beginning of the exception handler's scope (inclusive).end
- end of the exception handler's scope (exclusive).exception
- internal name of the type of exceptions handled by the handler.
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visitVarInsn
public void visitVarInsn(int opcode, int var) override this so we can see track which local var slots are in use and avoid overwriting them- Overrides:
visitVarInsn
in classorg.objectweb.asm.MethodVisitor
- Parameters:
opcode
- the bytecode operationvar
- local variable index
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newLocal
public int newLocal(org.objectweb.asm.Type valueType) return a new local slot index for a local var not currently in use. this must be released using popLocal before a new frame can be notified which means that the slot should only be allocated inside a generated trigger section and should be released before the trigger end of the trigger section by calling popLocal.- Parameters:
valueType
- the type of the value to be stored in the local slot- Returns:
- the index for the new slot
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popLocal
public void popLocal(int local) free a previously allocated local slot- Parameters:
local
- the slot to be released
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loadLocal
public void loadLocal(int local) load a value onto the stack from a local var slot which can obtained from a call to newLocal or from a lcoal variable table entry.- Parameters:
local
- the slot to load from
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storeLocal
public void storeLocal(int local) save a value on the stack to a local var slot- Parameters:
local
- the slot to save to
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getLocalType
public org.objectweb.asm.Type getLocalType(int local) -
visitMaxs
public void visitMaxs(int maxStack, int maxLocals) ensure we allow enough room for any extra locals on the stack- Overrides:
visitMaxs
in classorg.objectweb.asm.MethodVisitor
- Parameters:
maxStack
- the maximum stack depthmaxLocals
- the maximum local count
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dumpFrame
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dumpType
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visitFrame
- Overrides:
visitFrame
in classorg.objectweb.asm.MethodVisitor
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