Example usage for org.objectweb.asm Opcodes LONG

List of usage examples for org.objectweb.asm Opcodes LONG

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In this page you can find the example usage for org.objectweb.asm Opcodes LONG.

Prototype

Integer LONG

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Usage

From source file:org.jacoco.core.internal.instr.ProbeVariableInserterTest.java

License:Open Source License

@Test
public void testVisitFrame() {
    final FrameRecorder rec = new FrameRecorder();
    ProbeVariableInserter i = new ProbeVariableInserter(0, "(J)V", rec);

    // The first (implicit) frame must not be modified:
    i.visitFrame(Opcodes.F_NEW, 2, new Object[] { "LFoo;", Opcodes.LONG }, 0, new Object[0]);
    assertEquals(Arrays.asList((Object) "LFoo;", Opcodes.LONG), rec.frame.local);

    // Starting from the second frame on the probe variable is inserted:
    i.visitFrame(Opcodes.F_NEW, 3, new Object[] { "LFoo;", Opcodes.LONG, "Ljava/lang/String;" }, 0,
            new Object[0]);
    assertEquals(Arrays.asList((Object) "LFoo;", Opcodes.LONG, "[Z", "Ljava/lang/String;"), rec.frame.local);
}

From source file:org.jacoco.core.internal.instr.ProbeVariableInserterTest.java

License:Open Source License

@Test
public void testInsertProbeFrame() {
    final FrameRecorder rec = new FrameRecorder();
    ProbeVariableInserter i = new ProbeVariableInserter(0, "(J)V", rec);

    // The first (implicit) frame:
    i.visitFrame(Opcodes.F_NEW, 2, new Object[] { "LFoo;", Opcodes.LONG }, 0, new Object[0]);

    // There must be a label which is a multi-jump target:
    Label label = new Label();
    LabelInfo.setTarget(label);//from   w w  w.j  a  v  a 2  s  .com
    LabelInfo.setTarget(label);
    i.visitLabel(label);

    // Insert a frame for this label:
    i.visitFrame(Opcodes.F_NEW, 3, new Object[] { "LFoo;", Opcodes.LONG, "Ljava/lang/String;" }, 0,
            new Object[0]);

    // Insert this frame again:
    rec.frame = null;
    i.insertProbeFrame(label);

    assertEquals(Arrays.asList((Object) "LFoo;", Opcodes.LONG, "[Z", "Ljava/lang/String;"), rec.frame.local);
}

From source file:org.jacoco.core.internal.instr.ProbeVariableInserterTest.java

License:Open Source License

@Test
public void testInsertProbeFrameNoFrameForLabel() {
    final FrameRecorder rec = new FrameRecorder();
    ProbeVariableInserter i = new ProbeVariableInserter(0, "(J)V", rec);

    // The first (implicit) frame:
    i.visitFrame(Opcodes.F_NEW, 2, new Object[] { "LFoo;", Opcodes.LONG }, 0, new Object[0]);

    // There must be a label which is a multi-jump target:
    Label label = new Label();
    LabelInfo.setTarget(label);/*www. j  ava2 s.co m*/
    LabelInfo.setTarget(label);
    i.visitLabel(label);

    // Insert a frame for this label:
    i.visitFrame(Opcodes.F_NEW, 3, new Object[] { "LFoo;", Opcodes.LONG, "Ljava/lang/String;" }, 0,
            new Object[0]);

    // Try to insert a frame for a different label:
    rec.frame = null;
    i.insertProbeFrame(new Label());
    assertNull(rec.frame);
}

From source file:org.jacoco.core.internal.instr.ProbeVariableInserterTest.java

License:Open Source License

@Test
public void testInsertProbeFrameNoMultiTarget() {
    final FrameRecorder rec = new FrameRecorder();
    ProbeVariableInserter i = new ProbeVariableInserter(0, "(J)V", rec);

    // The first (implicit) frame:
    i.visitFrame(Opcodes.F_NEW, 2, new Object[] { "LFoo;", Opcodes.LONG }, 0, new Object[0]);

    // The frame for this label isn't required:
    Label label = new Label();
    i.visitLabel(label);//from  w w w.j  a  v  a2s .co m

    // Insert a frame for this label:
    i.visitFrame(Opcodes.F_NEW, 3, new Object[] { "LFoo;", Opcodes.LONG, "Ljava/lang/String;" }, 0,
            new Object[0]);

    // Inserting a frame for the label shouldn't work:
    rec.frame = null;
    i.insertProbeFrame(label);
    assertNull(rec.frame);
}

From source file:org.jboss.byteman.agent.adapter.RuleGeneratorAdapter.java

License:Open Source License

private void dumpType(StringBuffer buffer, Object t) {

    if (t == Opcodes.TOP) {
        buffer.append("TOP");
    } else if (t == null) {
        buffer.append("null");
    } else if (t == Opcodes.INTEGER) {
        buffer.append("int");
    } else if (t == Opcodes.FLOAT) {
        buffer.append("float");
    } else if (t == Opcodes.DOUBLE) {
        buffer.append("double");
    } else if (t == Opcodes.LONG) {
        buffer.append("long");
    } else if (t == Opcodes.NULL) {
        buffer.append("null");
    } else if (t == Opcodes.UNINITIALIZED_THIS) {
        buffer.append("uninit_this");
    } else if (t instanceof String) {
        buffer.append((String) t);
    } else {//  w  w  w. j  a va2  s  . co m
        buffer.append(((Label) t).getOffset());
    }
}

From source file:org.jboss.byteman.agent.adapter.RuleGeneratorAdapter.java

License:Open Source License

public void visitFrame(final int type, final int nLocal, final Object[] local, final int nStack,
        final Object[] stack) {
    if (type != Opcodes.F_NEW) { // uncompressed frame
        throw new IllegalStateException("ClassReader.accept() should be called with EXPAND_FRAMES flag");
    }/*from w w  w. j  a  v  a 2 s  . c o m*/

    // dumpFrame(nLocal, local, nStack, stack);

    // adjust the local types array

    int toRemove = localTypes.size();

    for (int i = toRemove; i > 0; i--) {
        localTypes.remove(i - 1);
    }

    int nextLocal = 0;

    for (int i = 0; i < nLocal; i++) {
        Object t = local[i];
        if (t == Opcodes.TOP) {
            localTypes.add(null);
        } else if (t == null) {
            localTypes.add(null);
        } else if (t == Opcodes.INTEGER) {
            localTypes.add(Type.INT_TYPE);
        } else if (t == Opcodes.FLOAT) {
            localTypes.add(Type.FLOAT_TYPE);
        } else if (t == Opcodes.DOUBLE) {
            localTypes.add(Type.DOUBLE_TYPE);
            nextLocal++;
            localTypes.add(null);
        } else if (t == Opcodes.LONG) {
            localTypes.add(Type.LONG_TYPE);
            nextLocal++;
            localTypes.add(null);
        } else if (t == Opcodes.NULL) {
            localTypes.add(null);
        } else if (t == Opcodes.UNINITIALIZED_THIS) {
            localTypes.add(null);
        } else if (t instanceof String) {
            localTypes.add(Type.getObjectType((String) t));
        } else {
            localTypes.add(null);
        }
        nextLocal++;
    }

    this.nextLocal = nextLocal;

    mv.visitFrame(type, nLocal, local, nStack, stack);
}

From source file:org.spongepowered.asm.util.Locals.java

License:MIT License

/**
 * <p>Attempts to identify available locals at an arbitrary point in the
 * bytecode specified by node.</p>
 * //w ww.jav  a 2s. co m
 * <p>This method builds an approximate view of the locals available at an
 * arbitrary point in the bytecode by examining the following features in
 * the bytecode:</p> 
 * <ul>
 *   <li>Any available stack map frames</li>
 *   <li>STORE opcodes</li>
 *   <li>The local variable table</li>
 * </ul>
 * 
 * <p>Inference proceeds by walking the bytecode from the start of the
 * method looking for stack frames and STORE opcodes. When either of these
 * is encountered, an attempt is made to cross-reference the values in the
 * stack map or STORE opcode with the value in the local variable table
 * which covers the code range. Stack map frames overwrite the entire
 * simulated local variable table with their own value types, STORE opcodes
 * overwrite only the local slot to which they pertain. Values in the
 * simulated locals array are spaced according to their size (unlike the
 * representation in FrameNode) and this TOP, NULL and UNINTITIALIZED_THIS
 * opcodes will be represented as null values in the simulated frame.</p>
 * 
 * <p>This code does not currently simulate the prescribed JVM behaviour
 * where overwriting the second slot of a DOUBLE or LONG actually
 * invalidates the DOUBLE or LONG stored in the previous location, so we
 * have to hope (for now) that this behaviour isn't emitted by the compiler
 * or any upstream transformers. I may have to re-think this strategy if
 * this situation is encountered in the wild.</p>
 * 
 * @param classNode ClassNode containing the method, used to initialise the
 *      implicit "this" reference in simple methods with no stack frames
 * @param method MethodNode to explore
 * @param node Node indicating the position at which to determine the locals
 *      state. The locals will be enumerated UP TO the specified node, so
 *      bear in mind that if the specified node is itself a STORE opcode,
 *      then we will be looking at the state of the locals PRIOR to its
 *      invocation
 * @return A sparse array containing a view (hopefully) of the locals at the
 *      specified location
 */
public static LocalVariableNode[] getLocalsAt(ClassNode classNode, MethodNode method, AbstractInsnNode node) {
    LocalVariableNode[] frame = new LocalVariableNode[method.maxLocals];
    int local = 0, index = 0;

    // Initialise implicit "this" reference in non-static methods
    if ((method.access & Opcodes.ACC_STATIC) == 0) {
        frame[local++] = new LocalVariableNode("this", classNode.name, null, null, null, 0);
    }

    // Initialise method arguments
    for (Type argType : Type.getArgumentTypes(method.desc)) {
        frame[local] = new LocalVariableNode("arg" + index++, argType.toString(), null, null, null, local);
        local += argType.getSize();
    }

    for (Iterator<AbstractInsnNode> iter = method.instructions.iterator(); iter.hasNext();) {
        AbstractInsnNode insn = iter.next();
        if (insn instanceof FrameNode) {
            FrameNode frameNode = (FrameNode) insn;

            // localPos tracks the location in the frame node's locals list, which doesn't leave space for TOP entries
            for (int localPos = 0, framePos = 0; framePos < frame.length; framePos++, localPos++) {
                // Get the local at the current position in the FrameNode's locals list
                final Object localType = (localPos < frameNode.local.size()) ? frameNode.local.get(localPos)
                        : null;

                if (localType instanceof String) { // String refers to a reference type
                    frame[framePos] = Locals.getLocalVariableAt(classNode, method, node, framePos);
                } else if (localType instanceof Integer) { // Integer refers to a primitive type or other marker
                    boolean isMarkerType = localType == Opcodes.UNINITIALIZED_THIS || localType == Opcodes.TOP
                            || localType == Opcodes.NULL;
                    boolean is32bitValue = localType == Opcodes.INTEGER || localType == Opcodes.FLOAT;
                    boolean is64bitValue = localType == Opcodes.DOUBLE || localType == Opcodes.LONG;
                    if (isMarkerType) {
                        frame[framePos] = null;
                    } else if (is32bitValue || is64bitValue) {
                        frame[framePos] = Locals.getLocalVariableAt(classNode, method, node, framePos);

                        if (is64bitValue) {
                            framePos++;
                            frame[framePos] = null; // TOP
                        }
                    } else {
                        throw new RuntimeException(
                                "Unrecognised locals opcode " + localType + " in locals array at position "
                                        + localPos + " in " + classNode.name + "." + method.name + method.desc);
                    }
                } else if (localType == null) {
                    frame[framePos] = null;
                } else {
                    throw new RuntimeException("Invalid value " + localType + " in locals array at position "
                            + localPos + " in " + classNode.name + "." + method.name + method.desc);
                }
            }
        } else if (insn instanceof VarInsnNode) {
            VarInsnNode varNode = (VarInsnNode) insn;
            frame[varNode.var] = Locals.getLocalVariableAt(classNode, method, node, varNode.var);
        } else if (insn == node) {
            break;
        }
    }

    return frame;
}

From source file:org.yx.asm.AsmUtils.java

License:Apache License

public static List<Object> getImplicitFrame(String desc) {
    List<Object> locals = new ArrayList<>();
    if (desc.isEmpty()) {
        return locals;
    }//from   w  ww.  j  ava 2 s  .c  om
    int i = 0;
    while (desc.length() > i) {
        int j = i;
        switch (desc.charAt(i++)) {
        case 'Z':
        case 'C':
        case 'B':
        case 'S':
        case 'I':
            locals.add(Opcodes.INTEGER);
            break;
        case 'F':
            locals.add(Opcodes.FLOAT);
            break;
        case 'J':
            locals.add(Opcodes.LONG);
            break;
        case 'D':
            locals.add(Opcodes.DOUBLE);
            break;
        case '[':
            while (desc.charAt(i) == '[') {
                ++i;
            }
            if (desc.charAt(i) == 'L') {
                ++i;
                while (desc.charAt(i) != ';') {
                    ++i;
                }
            }
            locals.add(desc.substring(j, ++i));
            break;
        case 'L':
            while (desc.charAt(i) != ';') {
                ++i;
            }
            locals.add(desc.substring(j + 1, i++));
            break;
        default:
            break;
        }
    }

    return locals;
}

From source file:org.yx.asm.ProxyMethodWritor.java

License:Apache License

private static int load(MethodVisitor mv, Object type, int frameIndex) {
    if (Opcodes.INTEGER.equals(type)) {
        mv.visitVarInsn(ILOAD, frameIndex);
        return frameIndex + SINGLE;
    }//from  w w  w  .j a  v a2  s  . c o m
    if (Opcodes.LONG.equals(type)) {
        mv.visitVarInsn(LLOAD, frameIndex);
        return frameIndex + WIDTH;
    }
    if (Opcodes.FLOAT.equals(type)) {
        mv.visitVarInsn(FLOAD, frameIndex);
        return frameIndex + SINGLE;
    }
    if (Opcodes.DOUBLE.equals(type)) {
        mv.visitVarInsn(DLOAD, frameIndex);
        return frameIndex + WIDTH;
    }
    mv.visitVarInsn(ALOAD, frameIndex);
    return frameIndex + SINGLE;
}

From source file:org.yx.asm.ProxyMethodWritor.java

License:Apache License

private static void store(MethodVisitor mv, Object type, int frameIndex) {
    if (Opcodes.INTEGER.equals(type)) {
        mv.visitVarInsn(ISTORE, frameIndex);
    } else if (Opcodes.LONG.equals(type)) {
        mv.visitVarInsn(LSTORE, frameIndex);
    } else if (Opcodes.FLOAT.equals(type)) {
        mv.visitVarInsn(FSTORE, frameIndex);
    } else if (Opcodes.DOUBLE.equals(type)) {
        mv.visitVarInsn(DSTORE, frameIndex);
    } else {//from w w  w.  j a va  2 s . com
        mv.visitVarInsn(ASTORE, frameIndex);
    }
}