程序包 cn.taketoday.bytecode.commons

类 JSRInlinerAdapter

java.lang.Object
cn.taketoday.bytecode.MethodVisitor
cn.taketoday.bytecode.tree.MethodNode
cn.taketoday.bytecode.commons.JSRInlinerAdapter
所有已实现的接口:
Opcodes
public class JSRInlinerAdapter extends MethodNode implements Opcodes
A MethodVisitor that removes JSR instructions and inlines the referenced subroutines.
作者:
Niko Matsakis

  • 字段详细资料

    • mainSubroutineInsns

      private final BitSet mainSubroutineInsns
      The instructions that belong to the main "subroutine". Bit i is set iff instruction at index i belongs to this main "subroutine".

    • subroutinesInsns

      private final HashMap<LabelNode,BitSet> subroutinesInsns
      The instructions that belong to each subroutine. For each label which is the target of a JSR instruction, bit i of the corresponding BitSet in this map is set iff instruction at index i belongs to this subroutine.

    • sharedSubroutineInsns

      final BitSet sharedSubroutineInsns
      The instructions that belong to more that one subroutine. Bit i is set iff instruction at index i belongs to more than one subroutine.

  • 构造器详细资料

    • JSRInlinerAdapter

      public JSRInlinerAdapter(MethodVisitor methodVisitor, int access, String name, String descriptor, String signature, String[] exceptions)
      Constructs a new JSRInlinerAdapter.
      参数:
      methodVisitor - the method visitor to send the resulting inlined method code to, or null.
      access - the method's access flags.
      name - the method's name.
      descriptor - the method's descriptor.
      signature - the method's signature. May be null.
      exceptions - the internal names of the method's exception classes. May be null.

  • 方法详细资料

    • visitJumpInsn

      public void visitJumpInsn(int opcode, Label label)
      从类复制的说明: MethodVisitor
      Visits a jump instruction. A jump instruction is an instruction that may jump to another instruction.
      覆盖:
      visitJumpInsn 在类中 MethodNode
      参数:
      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.

    • visitEnd

      public void visitEnd()
      从类复制的说明: MethodVisitor
      Visits the end of the method. This method, which is the last one to be called, is used to inform the visitor that all the annotations and attributes of the method have been visited.
      覆盖:
      visitEnd 在类中 MethodNode

    • findSubroutinesInsns

      private void findSubroutinesInsns()
      Determines, for each instruction, to which subroutine(s) it belongs.

    • findSubroutineInsns

      private void findSubroutineInsns(int startInsnIndex, BitSet subroutineInsns, BitSet visitedInsns)
      Finds the instructions that belong to the subroutine starting at the given instruction index. For this the control flow graph is visited with a depth first search (this includes the normal control flow and the exception handlers).
      参数:
      startInsnIndex - the index of the first instruction of the subroutine.
      subroutineInsns - where the indices of the instructions of the subroutine must be stored.
      visitedInsns - the indices of the instructions that have been visited so far (including in previous calls to this method). This bitset is updated by this method each time a new instruction is visited. It is used to make sure each instruction is visited at most once.

    • findReachableInsns

      private void findReachableInsns(int insnIndex, BitSet subroutineInsns, BitSet visitedInsns)
      Finds the instructions that are reachable from the given instruction, without following any JSR instruction nor any exception handler. For this the control flow graph is visited with a depth first search.
      参数:
      insnIndex - the index of an instruction of the subroutine.
      subroutineInsns - where the indices of the instructions of the subroutine must be stored.
      visitedInsns - the indices of the instructions that have been visited so far (including in previous calls to this method). This bitset is updated by this method each time a new instruction is visited. It is used to make sure each instruction is visited at most once.

    • emitCode

      private void emitCode()
      Creates the new instructions, inlining each instantiation of each subroutine until the code is fully elaborated.

    • emitInstantiation

      private void emitInstantiation(JSRInlinerAdapter.Instantiation instantiation, List<JSRInlinerAdapter.Instantiation> worklist, InsnList newInstructions, List<TryCatchBlockNode> newTryCatchBlocks, List<LocalVariableNode> newLocalVariables)
      Emits an instantiation of a subroutine, specified by instantiation. May add new instantiations that are invoked by this one to the worklist, and new try/catch blocks to newTryCatchBlocks.
      参数:
      instantiation - the instantiation that must be performed.
      worklist - list of the instantiations that remain to be done.
      newInstructions - the instruction list to which the instantiated code must be appended.
      newTryCatchBlocks - the exception handler list to which the instantiated handlers must be appended.
      newLocalVariables - the local variables list to which the instantiated local variables must be appended.