Examples of net.sf.joafip.asm.MethodVisitor.visitFrame()

net.sf.joafip.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 unconditionnal 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 samelocals 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 are thesame 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 frame data.
@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} forcompressed frames. @param nLocal the number of local variables in the visited frame. @param local the local variable types in this frame. This array must not be 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 not be modified. Its content has the same format as the "local" array.

      mv.visitVarInsn(LLOAD, 1);
      mv.visitInsn(LCONST_0);
      mv.visitInsn(LCMP);
      mv.visitJumpInsn(IFNE, l4);
      mv.visitLabel(l3);
      mv.visitFrame(Opcodes.F_NEW, 3, new Object[] { "java/lang/Object",
          Opcodes.LONG, Opcodes.INTEGER }, 0, new Object[] {});
      mv.visitVarInsn(LLOAD, 1);
      mv.visitInsn(LCONST_1);
      mv.visitInsn(LADD);
      mv.visitVarInsn(LSTORE, 1);

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      mv.visitVarInsn(LLOAD, 1);
      mv.visitInsn(LCONST_1);
      mv.visitInsn(LADD);
      mv.visitVarInsn(LSTORE, 1);
      mv.visitLabel(l4);
      mv.visitFrame(Opcodes.F_NEW, 3, new Object[] { "java/lang/Object",
          Opcodes.LONG, Opcodes.INTEGER }, 0, new Object[] {});
      mv.visitVarInsn(ALOAD, 0);
      mv.visitVarInsn(LLOAD, 1);
      mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "wait",
          "(J)V");

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      mv.visitCode();
      Label l0 = new Label();
      Label l1 = new Label();
      Label l2 = new Label();
      mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
      mv.visitFrame(Opcodes.F_NEW, 0, new Object[] {}, 0, new Object[] {});
      mv.visitVarInsn(ALOAD, 1);
      mv.visitVarInsn(ALOAD, 0);
      Label l3 = new Label();
      mv.visitJumpInsn(IF_ACMPEQ, l3);
      mv.visitLabel(l0);

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          "net/sf/joafip/store/service/proxy/ProxyManager2",
          "forceLoad", "(Ljava/lang/Object;)V");
      mv.visitLabel(l1);
      mv.visitJumpInsn(GOTO, l3);
      mv.visitLabel(l2);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 1,
          new Object[] { "java/lang/Exception" });
      mv.visitVarInsn(ASTORE, 2);
      mv.visitTypeInsn(NEW,
          "net/sf/joafip/store/service/proxy/JoafipObjectException");

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      mv.visitMethodInsn(INVOKESPECIAL,
          "net/sf/joafip/store/service/proxy/JoafipObjectException",
          "<init>", "(Ljava/lang/Throwable;)V");
      mv.visitInsn(ATHROW);
      mv.visitLabel(l3);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 0, new Object[] {});
      mv.visitInsn(RETURN);
      mv.visitMaxs(3, 3);
      mv.visitEnd();
    }

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    }
    {
      mv = cw.visitMethod(ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z",
          null, null);
      mv.visitCode();
      mv.visitFrame(Opcodes.F_NEW, 0, new Object[] {}, 0, new Object[] {});
      mv.visitVarInsn(ALOAD, 0);
      mv.visitVarInsn(ALOAD, 1);
      Label l0 = new Label();
      mv.visitJumpInsn(IF_ACMPNE, l0);
      mv.visitInsn(ICONST_1);

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      mv.visitJumpInsn(IF_ACMPNE, l0);
      mv.visitInsn(ICONST_1);
      Label l1 = new Label();
      mv.visitJumpInsn(GOTO, l1);
      mv.visitLabel(l0);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 0, new Object[] {});
      mv.visitInsn(ICONST_0);
      mv.visitLabel(l1);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 1, new Object[] { Opcodes.INTEGER });

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      mv.visitLabel(l0);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 0, new Object[] {});
      mv.visitInsn(ICONST_0);
      mv.visitLabel(l1);
      mv.visitFrame(Opcodes.F_NEW, 2, new Object[] { "java/lang/Object",
          "java/lang/Object" }, 1, new Object[] { Opcodes.INTEGER });
      mv.visitInsn(IRETURN);
      mv.visitMaxs(2, 2);
      mv.visitEnd();
    }

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    }
    {
      mv = cw.visitMethod(ACC_PUBLIC + ACC_FINAL, "wait", "(JI)V", null,
          new String[] { "java/lang/InterruptedException" });
      mv.visitCode();
      mv.visitFrame(Opcodes.F_NEW, 0, new Object[] {}, 0, new Object[] {});
      mv.visitVarInsn(LLOAD, 1);
      mv.visitInsn(LCONST_0);
      mv.visitInsn(LCMP);
      Label l0 = new Label();
      mv.visitJumpInsn(IFGE, l0);

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      mv.visitMethodInsn(INVOKESPECIAL,
          "java/lang/IllegalArgumentException", "<init>",
          "(Ljava/lang/String;)V");
      mv.visitInsn(ATHROW);
      mv.visitLabel(l0);
      mv.visitFrame(Opcodes.F_NEW, 3, new Object[] { "java/lang/Object",
          Opcodes.LONG, Opcodes.INTEGER }, 0, new Object[] {});
      mv.visitVarInsn(ILOAD, 3);
      Label l1 = new Label();
      mv.visitJumpInsn(IFLT, l1);
      mv.visitVarInsn(ILOAD, 3);

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