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

Class org.deuce.objectweb.asm.MethodVisitor

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

org.deuce.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.

      mv.visitInsn(DUP);
      mv.visitMethodInsn(INVOKESPECIAL, Names.RMISecurityManager, "<init>", "()V");
      mv.visitMethodInsn(INVOKESTATIC, Names.System, "setSecurityManager", Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {Type.getType(SecurityManager.class)}));//"(Ljava/lang/SecurityManager;)V");
      mv.visitLabel(l9);
    
      mv.visitFrame(Opcodes.F_FULL, 1, new Object[] {proxyName}, 0, new Object[] {});
      mv.visitMethodInsn(INVOKESTATIC, Names.HyflowNetwork, "getInstance", Type.getMethodDescriptor(Type.getType(Network.class), new Type[]{}));//"()Ledu/vt/rt/hyflow/util/network/Network;");
      mv.visitMethodInsn(INVOKEVIRTUAL, Names.HyflowNetwork, "getPort", "()I");
      mv.visitIntInsn(SIPUSH, 1000);
      mv.visitInsn(IADD);
      mv.visitVarInsn(ISTORE, 1);

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      mv.visitVarInsn(ASTORE, 2);
      mv.visitLabel(l1);
      mv.visitJumpInsn(GOTO, l3);
      mv.visitLabel(l2);


      mv.visitFrame(Opcodes.F_FULL, 3, new Object[] {proxyName, Opcodes.INTEGER, "java/rmi/registry/Registry"}, 1, new Object[] {Names.RMIException});
      mv.visitVarInsn(ASTORE, 3);
      Label l12 = new Label();
      mv.visitLabel(l12);


      mv.visitVarInsn(ALOAD, 3);

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      mv.visitVarInsn(ALOAD, 3);
      mv.visitMethodInsn(INVOKEVIRTUAL, Names.RMIException, "printStackTrace", "()V");
      mv.visitLabel(l3);


      mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
      mv.visitVarInsn(ALOAD, 0);
      mv.visitInsn(ICONST_1);
      mv.visitMethodInsn(INVOKESTATIC, Names.UniCastObject, "unexportObject", "(Ljava/rmi/Remote;Z)Z");
      mv.visitInsn(POP);
      mv.visitLabel(l4);

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      mv.visitLabel(l4);
      Label l13 = new Label();
      mv.visitJumpInsn(GOTO, l13);
      mv.visitLabel(l5);


      mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/Exception"});
      mv.visitVarInsn(ASTORE, 3);
      Label l14 = new Label();
      mv.visitLabel(l14);


      mv.visitLdcInsn("RMI unexporting");

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      mv.visitLdcInsn("RMI unexporting");
      mv.visitMethodInsn(INVOKESTATIC, "edu/vt/rt/hyflow/util/io/Logger", "error", "(Ljava/lang/String;)V");
      mv.visitLabel(l13);


      mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
      mv.visitVarInsn(ALOAD, 0);
      mv.visitInsn(ICONST_0);
      mv.visitMethodInsn(INVOKESTATIC, "java/rmi/server/UnicastRemoteObject", "exportObject", "(Ljava/rmi/Remote;I)Ljava/rmi/Remote;");
      mv.visitTypeInsn(CHECKCAST, proxyIName);
      mv.visitVarInsn(ASTORE, 3);

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