Examples of org.objectweb.asm.MethodVisitor.visitFrame()

org.objectweb.asm.MethodVisitor.visitFrame()
Visits the current state of the local variables and operand stack elements. This method must(*) be called just before any instruction i that follows an unconditional branch instruction such as GOTO or THROW, that is the target of a jump instruction, or that starts an exception handler block. The visited types must describe the values of the local variables and of the operand stack elements just before i is executed.

(*) this is mandatory only for classes whose version is greater than or equal to {@link Opcodes#V1_6 V1_6}.

Packed frames are basically "deltas" from the state of the previous frame (very first frame is implicitly defined by the method's parameters and access flags):
- {@link Opcodes#F_SAME} representing frame with exactly the samelocals as the previous frame and with the empty stack.
- {@link 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).
- {@link Opcodes#F_APPEND} representing frame with current locals arethe 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).
- {@link Opcodes#F_CHOP} representing frame with current locals arethe 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).
- {@link Opcodes#F_FULL} representing complete framedata.
@param type the type of this stack map frame. Must be{@link Opcodes#F_NEW} for expanded frames, or{@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link Opcodes#F_SAME} or{@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressedframes. @param nLocal the number of local variables in the visited frame. @param local the local variable types in this frame. This array must notbe modified. Primitive types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or{@link Opcodes#UNINITIALIZED_THIS} (long and double arerepresented 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). @param nStack the number of operand stack elements in the visited frame. @param stack the operand stack types in this frame. This array must notbe modified. Its content has the same format as the "local" array. @throws IllegalStateException if a frame is visited just after anotherone, without any instruction between the two (unless this frame is a Opcodes#F_SAME frame, in which case it is silently ignored).


            mv.visitInsn(ARETURN);
          }


          mv.visitLabel(defaultLabel);
          mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
        mv.visitInsn(DUP);
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP);

View Full Code Here

          for (int i = 0, n = labels.length; i < n; i++) {
            Field field = fields.get(i);
            Type fieldType = Type.getType(field.getType());


            mv.visitLabel(labels[i]);
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitTypeInsn(CHECKCAST, classNameInternal);
            mv.visitVarInsn(ALOAD, 3);


            switch (fieldType.getSort()) {

View Full Code Here

            mv.visitFieldInsn(PUTFIELD, classNameInternal, field.getName(), fieldType.getDescriptor());
            mv.visitInsn(RETURN);
          }


          mv.visitLabel(defaultLabel);
          mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
        mv.visitInsn(DUP);
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP);

View Full Code Here


          for (int i = 0, n = labels.length; i < n; i++) {
            Field field = fields.get(i);


            mv.visitLabel(labels[i]);
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitTypeInsn(CHECKCAST, classNameInternal);
            mv.visitFieldInsn(GETFIELD, classNameInternal, field.getName(), Type.getDescriptor(field.getType()));


            Type fieldType = Type.getType(field.getType());

View Full Code Here


            mv.visitInsn(ARETURN);
          }


          mv.visitLabel(defaultLabel);
          mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
        mv.visitInsn(DUP);
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP);

View Full Code Here


          StringBuilder buffer = new StringBuilder(128);
          for (int i = 0, n = labels.length; i < n; i++) {
            mv.visitLabel(labels[i]);
            if (i == 0)
              mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {classNameInternal}, 0, null);
            else
              mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 4);


            buffer.setLength(0);

View Full Code Here

          for (int i = 0, n = labels.length; i < n; i++) {
            mv.visitLabel(labels[i]);
            if (i == 0)
              mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] {classNameInternal}, 0, null);
            else
              mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 4);


            buffer.setLength(0);
            buffer.append('(');

View Full Code Here


            mv.visitInsn(ARETURN);
          }


          mv.visitLabel(defaultLabel);
          mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
        mv.visitInsn(DUP);
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP);

View Full Code Here

      for (int i = 0, n = labels.length; i < n; i++) {
        Field field = fields.get(i);
        Type fieldType = Type.getType(field.getType());


        mv.visitLabel(labels[i]);
        mv.visitFrame(F_SAME, 0, null, 0, null);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, classNameInternal);
        mv.visitVarInsn(ALOAD, 3);


        switch (fieldType.getSort()) {

View Full Code Here

        mv.visitFieldInsn(PUTFIELD, classNameInternal, field.getName(), fieldType.getDescriptor());
        mv.visitInsn(RETURN);
      }


      mv.visitLabel(defaultLabel);
      mv.visitFrame(F_SAME, 0, null, 0, null);
    }
    mv = insertThrowExceptionForFieldNotFound(mv);
    mv.visitMaxs(maxStack, 4);
    mv.visitEnd();
  }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.