Examples of org.jboss.classfilewriter.InvalidBytecodeException

org.jboss.classfilewriter.InvalidBytecodeException

     */
    public void returnInstruction() {
        String returnType = method.getReturnType();
        if (!returnType.equals("V")) {
            if (!getStack().isOnTop(returnType)) {
                throw new InvalidBytecodeException(returnType + " is not on top of stack. " + getStack().toString());
            }
        }


        // all these instructions are one byte
        currentOffset++;

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        return currentFrame.getStackState();
    }


    public void assertTypeOnStack(int position, StackEntryType type, String message) {
        if (getStack().size() <= position) {
            throw new InvalidBytecodeException(message + " Stack State: " + getStack().toString());
        }
        int index = getStack().getContents().size() - 1 - position;
        if (type == StackEntryType.DOUBLE || type == StackEntryType.LONG) {
            index -= 1;
        }
        StackEntryType stype = getStack().getContents().get(index).getType();
        if (stype != type) {
            if (!(type == StackEntryType.OBJECT && stype == StackEntryType.NULL)) {
                throw new InvalidBytecodeException(message + " Stack State: " + getStack().toString());
            }
        }
    }

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        assertTypeOnStack(0, type, message);
    }


    public void assertNotWideOnStack(int position, String message) {
        if (getStack().size() <= position) {
            throw new InvalidBytecodeException(message + " Stack State: " + getStack().toString());
        }
        int index = getStack().getContents().size() - 1 - position;


        StackEntryType stype = getStack().getContents().get(index).getType();
        if (stype == StackEntryType.TOP) {
            throw new InvalidBytecodeException(message + " Stack State: " + getStack().toString());
        }
    }

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            return;
        }
        StackState currentStackState = getStack();
        StackState mergeStackState = stackFrame.getStackState();
        if (currentStackState.size() != mergeStackState.size()) {
            throw new InvalidBytecodeException("Cannot merge stack frames, different stack sizes");
        }
        for (int i = 0; i < mergeStackState.size(); ++i) {
            StackEntry currentEntry = currentStackState.getContents().get(i);
            StackEntry mergeEntry = mergeStackState.getContents().get(i);
            if (mergeEntry.getType() == currentEntry.getType()) {
                if (mergeEntry.getType() == StackEntryType.OBJECT) {
                    if (!mergeEntry.getDescriptor().equals(currentEntry.getDescriptor())) {
                        if (!mergeEntry.equals("Ljava/lang/Object;")) {
                            // we cannot reliably determine if closes common superclass at this point
                            // so we will just mark the stack map attribute as invalid
                            stackMapAttributeValid = false;
                        }
                    }
                }
            } else if (!((mergeEntry.getType() == StackEntryType.NULL && currentEntry.getType() == StackEntryType.OBJECT) || (mergeEntry
                    .getType() == StackEntryType.OBJECT && currentEntry.getType() == StackEntryType.NULL))) {
                throw new InvalidBytecodeException("Cannot merge stack frame " + currentStackState + " with frame "
                        + mergeStackState + " stack entry " + i + " is invalid");
            }
        }


        LocalVariableState currentLocalVariableState = getLocalVars();
        LocalVariableState mergeLocalVariableState = getLocalVars();
        if (currentLocalVariableState.size() < mergeLocalVariableState.size()) {
            throw new InvalidBytecodeException(
                    "Cannot merge stack frames, merge location has less locals than current location");
        }
        for (int i = 0; i < mergeLocalVariableState.size(); ++i) {
            StackEntry currentEntry = currentLocalVariableState.getContents().get(i);
            StackEntry mergeEntry = mergeLocalVariableState.getContents().get(i);
            if (mergeEntry.getType() == currentEntry.getType()) {
                if (mergeEntry.getType() == StackEntryType.OBJECT) {
                    if (!mergeEntry.getDescriptor().equals(currentEntry.getDescriptor())) {
                        if (!mergeEntry.equals("Ljava/lang/Object;")) {
                            // we cannot reliably determine if closes common superclass at this point
                            // so we will just mark the stack map attribute as invalid
                            stackMapAttributeValid = false;
                        }
                    }
                }
            } else if (!((mergeEntry.getType() == StackEntryType.NULL && currentEntry.getType() == StackEntryType.OBJECT) || (mergeEntry
                    .getType() == StackEntryType.OBJECT && currentEntry.getType() == StackEntryType.NULL))) {
                throw new InvalidBytecodeException("Cannot merge stack frame " + currentLocalVariableState + " with frame "
                        + currentLocalVariableState + " local variable entry " + i + " is invalid");
            }
        }
    }

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    // Instruction methods, in alphabetical order


    public void aaload() {
        assertTypeOnStack(StackEntryType.INT, "aaload requires int on top of stack");
        if (!getStack().top_1().getDescriptor().startsWith("[")) {
            throw new InvalidBytecodeException("aaload needs an array in position 2 on the stack");
        }
        writeByte(Opcode.AALOAD);
        currentOffset++;
        advanceFrame(currentFrame.pop2push1("Ljava/lang/Object;"));
    }

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    public void aastore() {
        assertTypeOnStack(StackEntryType.OBJECT, "aastore requires reference type on top of stack");
        assertTypeOnStack(1, StackEntryType.INT, "aastore requires an int on position 2 stack");
        if (!getStack().top_2().getDescriptor().startsWith("[")) {
            throw new InvalidBytecodeException("aaload needs an array in position 3 on the stack");
        }
        writeByte(Opcode.AASTORE);
        currentOffset++;
        advanceFrame(currentFrame.pop3());
    }

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    }


    public void aload(int no) {
        LocalVariableState locals = getLocalVars();
        if (locals.size() <= no) {
            throw new InvalidBytecodeException("Cannot load variable at " + no + ". Local Variables: " + locals.toString());
        }
        StackEntry entry = locals.get(no);
        if (entry.getType() != StackEntryType.OBJECT && entry.getType() != StackEntryType.NULL
                && entry.getType() != StackEntryType.UNINITIALIZED_THIS
                && entry.getType() != StackEntryType.UNITITIALIZED_OBJECT) {
            throw new InvalidBytecodeException("Invalid local variable at location " + no + " Local Variables "
                    + locals.toString());
        }


        if (no > 0xFF) {
            // wide version

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    }


    public void dload(int no) {
        LocalVariableState locals = getLocalVars();
        if (locals.size() <= no) {
            throw new InvalidBytecodeException("Cannot load variable at " + no + ". Local Variables: " + locals.toString());
        }
        StackEntry entry = locals.get(no);
        if (entry.getType() != StackEntryType.DOUBLE) {
            throw new InvalidBytecodeException("Invalid local variable at location " + no + " Local Variables "
                    + locals.toString());
        }


        if (no > 0xFF) {
            // wide version

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    /**
     * Marks the current code location as the exception handler and adds the handler to the exception handler table;
     */
    public void exceptionHandlerStart(ExceptionHandler handler) {
        if (handler.getEnd() == 0) {
            throw new InvalidBytecodeException(
                    "handler end location must be initialised via exceptionHandlerEnd before calling exceptionHandlerAdd");
        }
        handler.setHandler(currentOffset);
        exceptionTable.add(handler);
        mergeStackFrames(new StackFrame(new StackState(handler.getExceptionType(), constPool), handler.getFrame()

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    }


    public void fload(int no) {
        LocalVariableState locals = getLocalVars();
        if (locals.size() <= no) {
            throw new InvalidBytecodeException("Cannot load variable at " + no + ". Local Variables: " + locals.toString());
        }
        StackEntry entry = locals.get(no);
        if (entry.getType() != StackEntryType.FLOAT) {
            throw new InvalidBytecodeException("Invalid local variable at location " + no + " Local Variables "
                    + locals.toString());
        }


        if (no > 0xFF) {
            // wide version

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Related Classes of org.jboss.classfilewriter.InvalidBytecodeException

org.jboss.classfilewriter.code.CodeAttribute

org.jboss.classfilewriter.code.LocalVariableState

org.jboss.classfilewriter.code.StackState

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