Package javassist.bytecode
Class StackMapTable
- java.lang.Object
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- javassist.bytecode.AttributeInfo
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- javassist.bytecode.StackMapTable
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public class StackMapTable extends AttributeInfo
stack_map
attribute.This is an entry in the attributes table of a Code attribute. It was introduced by J2SE 6 for the verification by typechecking.
- Since:
- 3.4
- See Also:
StackMap
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
StackMapTable.RuntimeCopyException
An exception that may be thrown bycopy()
inStackMapTable
.static class
StackMapTable.Walker
A code walker for a StackMapTable attribute.static class
StackMapTable.Writer
A writer of stack map tables.
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Field Summary
Fields Modifier and Type Field Description static int
DOUBLE
Double_variable_info.tag
.static int
FLOAT
Float_variable_info.tag
.static int
INTEGER
Integer_variable_info.tag
.static int
LONG
Long_variable_info.tag
.static int
NULL
Null_variable_info.tag
.static int
OBJECT
Object_variable_info.tag
.static java.lang.String
tag
The name of this attribute"StackMapTable"
.static int
THIS
UninitializedThis_variable_info.tag
.static int
TOP
Top_variable_info.tag
.static int
UNINIT
Uninitialized_variable_info.tag
.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description AttributeInfo
copy(ConstPool newCp, java.util.Map<java.lang.String,java.lang.String> classnames)
Makes a copy.void
insertLocal(int index, int tag, int classInfo)
Updates this stack map table when a new local variable is inserted for a new parameter.void
println(java.io.PrintStream ps)
Prints the stack table map.void
println(java.io.PrintWriter w)
Prints the stack table map.void
removeNew(int where)
Undocumented method.static int
typeTagOf(char descriptor)
Returns the tag of the type specified by the descriptor.-
Methods inherited from class javassist.bytecode.AttributeInfo
get, getConstPool, getName, length, set
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Field Detail
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tag
public static final java.lang.String tag
The name of this attribute"StackMapTable"
.- See Also:
- Constant Field Values
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TOP
public static final int TOP
Top_variable_info.tag
.- See Also:
- Constant Field Values
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INTEGER
public static final int INTEGER
Integer_variable_info.tag
.- See Also:
- Constant Field Values
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FLOAT
public static final int FLOAT
Float_variable_info.tag
.- See Also:
- Constant Field Values
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DOUBLE
public static final int DOUBLE
Double_variable_info.tag
.- See Also:
- Constant Field Values
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LONG
public static final int LONG
Long_variable_info.tag
.- See Also:
- Constant Field Values
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NULL
public static final int NULL
Null_variable_info.tag
.- See Also:
- Constant Field Values
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THIS
public static final int THIS
UninitializedThis_variable_info.tag
.- See Also:
- Constant Field Values
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OBJECT
public static final int OBJECT
Object_variable_info.tag
.- See Also:
- Constant Field Values
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UNINIT
public static final int UNINIT
Uninitialized_variable_info.tag
.- See Also:
- Constant Field Values
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Method Detail
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copy
public AttributeInfo copy(ConstPool newCp, java.util.Map<java.lang.String,java.lang.String> classnames) throws StackMapTable.RuntimeCopyException
Makes a copy.- Overrides:
copy
in classAttributeInfo
- Parameters:
newCp
- the constant pool table used by the new copy.classnames
- pairs of replaced and substituted class names.- Throws:
StackMapTable.RuntimeCopyException
- if aBadBytecode
exception is thrown while copying, it is converted intoRuntimeCopyException
.
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insertLocal
public void insertLocal(int index, int tag, int classInfo) throws BadBytecode
Updates this stack map table when a new local variable is inserted for a new parameter.- Parameters:
index
- the index of the added local variable.tag
- the type tag of that local variable.classInfo
- the index of theCONSTANT_Class_info
structure in a constant pool table. This should be zero unless the tag isITEM_Object
.- Throws:
BadBytecode
- See Also:
CtBehavior.addParameter(javassist.CtClass)
,typeTagOf(char)
,ConstPool
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typeTagOf
public static int typeTagOf(char descriptor)
Returns the tag of the type specified by the descriptor. This method returnsINTEGER
unless the descriptor is either D (double), F (float), J (long), L (class type), or [ (array).- Parameters:
descriptor
- the type descriptor.- See Also:
Descriptor
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println
public void println(java.io.PrintWriter w)
Prints the stack table map.
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println
public void println(java.io.PrintStream ps)
Prints the stack table map.- Parameters:
ps
- a print stream such asSystem.out
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removeNew
public void removeNew(int where) throws CannotCompileException
Undocumented method. Do not use; internal-use only.This method is for javassist.convert.TransformNew. It is called to update the stack map table when the NEW opcode (and the following DUP) is removed.
- Parameters:
where
- the position of the removed NEW opcode.- Throws:
CannotCompileException
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