Class StackMapData

java.lang.Object
org.openjdk.asmtools.jdis.Indenter
org.openjdk.asmtools.jdis.MemberData<CodeData>
org.openjdk.asmtools.jdis.StackMapData
All Implemented Interfaces:
Printable
public class StackMapData extends MemberData<CodeData>
Represents one entry of StackMapTable attribute:

union stack_map_entry { same_frame; same_locals_1_stack_item_frame; same_locals_1_stack_item_frame_extended; chop_frame; same_frame_extended; append_frame; full_frame; }

or StackMap attribute

stack_map_entry { u2 offset; u2 number_of_locals; verification_type_info locals[number_of_locals]; u2 number_of_stack_items; verification_type_info stack[number_of_stack_items]; }

See Also:

  • Field Details

    • range

      static Range<Integer> range

    • attribute

      private final EAttribute attribute

    • stackEntryType

      StackMap.EntryType stackEntryType

    • stackEntryTypeValue

      int stackEntryTypeValue

    • isWrapped

      boolean isWrapped

    • wrapLevel

      int wrapLevel

    • frame_pc

      int frame_pc

    • offset

      int offset

    • lockMap

      int[] lockMap

    • stackMap

      int[] stackMap

    • unsetFields

      int[] unsetFields

    • printer

      private StackMapData.Printer printer

    • doubleIndent

      private int doubleIndent

    • tripleIndent

      private int tripleIndent

    • intLine

      private String intLine

    • strLine

      private String strLine

    • shift

      private int shift

    • tableHeader

      private String tableHeader

  • Constructor Details

    • StackMapData

      public StackMapData(CodeData code, DataInputStream in) throws IOException
      Constructor for ATT_StackMap (Java 5,6)
      Parameters:
      code - the code attribute where this attribute is located
      in - the input stream
      Throws:
      IOException - the exception if something went wrong

    • StackMapData

      public StackMapData(boolean firstStackMap, int prevFrame_pc, CodeData code, DataInputStream in) throws IOException
      Constructor for ATT_StackMapTable (Java 6, 7+)
      Parameters:
      firstStackMap - is it an entries[0] in the stack_map_entry structure? i.e. Does the StackMapData describe the second stack map frame of the method?
      prevFrame_pc - the bytecode offset of the previous entry (entries[current_index-1])
      code - the code attribute where this attribute is located
      in - the input stream
      Throws:
      IOException - the exception if something went wrong

  • Method Details

    • jasmPrint

      protected void jasmPrint(int index, int size) throws IOException
      Prints the StackMap data in Jasm format.
      Overrides:
      jasmPrint in class Indenter
      Parameters:
      index - the index of the current entry
      size - the total number of entries
      Throws:
      IOException - if an I/O error occurs while printing

    • stackMapPrinter

      private void stackMapPrinter(int index, int size) throws IOException
      Throws:
      IOException

    • stackMapTablePrinter

      private void stackMapTablePrinter(int index, int size)

    • tablePrint

      protected void tablePrint(int index, int size) throws IOException
      Overrides:
      tablePrint in class Indenter
      Throws:
      IOException

    • isPrintable

      public boolean isPrintable()

    • getFramePC

      public int getFramePC()
      Returns:
      the bytecode offset at which a stack map frame applies

    • getStackEntryType

      public StackMap.EntryType getStackEntryType()

    • getFieldListAsString

      public Pair<List<String>, List<String>> getFieldListAsString(int[] fields)

    • getMapListAsString

      public Pair<String,String> getMapListAsString(int[] map, String delimiter)

    • belongsToStackMapTable

      public boolean belongsToStackMapTable()
      Returns:
      true if the entity presents a StackMapTable since Java 6

    • setPrintParticles

      public StackMapData setPrintParticles(String intLine, String strLine, int shift)
      Sets helper printing particles

    • setHeader

      public StackMapData setHeader(String header)
      Sets table header

    • readMap

      private int[] readMap(DataInputStream in) throws IOException
      Throws:
      IOException

    • readFields

      private int[] readFields(DataInputStream in) throws IOException
      Throws:
      IOException

    • readMapElements

      private int[] readMapElements(DataInputStream in, int num) throws IOException
      Throws:
      IOException

    • getCommentOffsetFor

      private int getCommentOffsetFor(String line, int shiftCount)

    • getCommentOffsetFor

      private int getCommentOffsetFor(int lineLength, int shiftCount)