Examples with FieldNode org.objectweb.asm.tree.FieldNode used on opensource projects

Example 11 with FieldNode

use of org.objectweb.asm.tree.FieldNode in project MinecraftForge by MinecraftForge.

the class FMLDeobfuscatingRemapper method getFieldType.

@Nullable
private String getFieldType(String owner, String name) {
    if (fieldDescriptions.containsKey(owner)) {
        return fieldDescriptions.get(owner).get(name);
    }
    synchronized (fieldDescriptions) {
        try {
            byte[] classBytes = ClassPatchManager.INSTANCE.getPatchedResource(owner, map(owner).replace('/', '.'), classLoader);
            if (classBytes == null) {
                return null;
            }
            ClassReader cr = new ClassReader(classBytes);
            ClassNode classNode = new ClassNode();
            cr.accept(classNode, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
            Map<String, String> resMap = Maps.newHashMap();
            for (FieldNode fieldNode : classNode.fields) {
                resMap.put(fieldNode.name, fieldNode.desc);
            }
            fieldDescriptions.put(owner, resMap);
            return resMap.get(name);
        } catch (IOException e) {
            FMLRelaunchLog.log(Level.ERROR, e, "A critical exception occurred reading a class file %s", owner);
        }
        return null;
    }
}

Example 12 with FieldNode

use of org.objectweb.asm.tree.FieldNode in project MinecraftForge by MinecraftForge.

the class ItemStackTransformer method transform.

@Override
public byte[] transform(String name, String transformedName, byte[] basicClass) {
    if (!"net.minecraft.item.ItemStack".equals(name))
        return basicClass;
    ClassNode classNode = new ClassNode();
    ClassReader classReader = new ClassReader(basicClass);
    classReader.accept(classNode, 0);
    FieldNode itemField = null;
    for (FieldNode f : classNode.fields) {
        if (ITEM_TYPE.equals(f.desc) && itemField == null) {
            itemField = f;
        } else if (ITEM_TYPE.equals(f.desc)) {
            throw new RuntimeException("Error processing ItemStack - found a duplicate Item field");
        }
    }
    if (itemField == null) {
        throw new RuntimeException("Error processing ItemStack - no Item field declared (is the code somehow obfuscated?)");
    }
    MethodNode getItemMethod = null;
    for (MethodNode m : classNode.methods) {
        if (m.name.equals("getItemRaw"))
            continue;
        if (GETITEM_DESC.equals(m.desc) && getItemMethod == null) {
            getItemMethod = m;
        } else if (GETITEM_DESC.equals(m.desc)) {
            throw new RuntimeException("Error processing ItemStack - duplicate getItem method found");
        }
    }
    if (getItemMethod == null) {
        throw new RuntimeException("Error processing ItemStack - no getItem method found (is the code somehow obfuscated?)");
    }
    for (MethodNode m : classNode.methods) {
        if (m.name.equals("getItemRaw"))
            continue;
        for (ListIterator<AbstractInsnNode> it = m.instructions.iterator(); it.hasNext(); ) {
            AbstractInsnNode insnNode = it.next();
            if (insnNode.getType() == AbstractInsnNode.FIELD_INSN) {
                FieldInsnNode fi = (FieldInsnNode) insnNode;
                if (itemField.name.equals(fi.name) && fi.getOpcode() == Opcodes.GETFIELD) {
                    it.remove();
                    MethodInsnNode replace = new MethodInsnNode(Opcodes.INVOKEVIRTUAL, "net/minecraft/item/ItemStack", getItemMethod.name, getItemMethod.desc, false);
                    it.add(replace);
                }
            }
        }
    }
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(writer);
    return writer.toByteArray();
}

Example 13 with FieldNode

use of org.objectweb.asm.tree.FieldNode in project spring-loaded by spring-projects.

the class SpringLoadedTests method getField.

@SuppressWarnings("unchecked")
private FieldNode getField(byte[] classbytes, String fieldName) {
    ClassReader super_cr = new ClassReader(classbytes);
    ClassNode cn = new ClassNode();
    super_cr.accept(cn, 0);
    List<FieldNode> fields = cn.fields;
    if (fields != null) {
        for (FieldNode fn : fields) {
            if (fn.name.equals(fieldName)) {
                return fn;
            }
        }
    }
    return null;
}

Example 14 with FieldNode

use of org.objectweb.asm.tree.FieldNode in project spring-loaded by spring-projects.

the class SpringLoadedTests method toStringField.

@SuppressWarnings("unchecked")
protected String toStringField(byte[] classdata, String fieldname) {
    StringBuilder sb = new StringBuilder();
    FieldNode fieldNode = getField(classdata, fieldname);
    if (fieldNode == null) {
        return null;
    }
    List<AnnotationNode> annos = fieldNode.visibleAnnotations;
    if (annos != null) {
        sb.append("vis(").append(toStringAnnotations(annos)).append(") ");
    }
    annos = fieldNode.invisibleAnnotations;
    if (annos != null) {
        sb.append("invis(").append(toStringAnnotations(annos)).append(") ");
    }
    // will need implementing at some point:
    //		List<Attribute> attrs = fieldNode.attrs;
    //		if (attrs = !null) {
    //			sb.append("attrs(").append(toStringAttributes(attrs)).append(") ");
    //		}
    sb.append("0x").append(Integer.toHexString(fieldNode.access)).append("(").append(ClassPrinter.toAccessForMember(fieldNode.access)).append(") ");
    sb.append(fieldNode.name).append(" ");
    sb.append(fieldNode.desc).append(" ");
    if (fieldNode.signature != null) {
        sb.append(fieldNode.signature).append(" ");
    }
    if (fieldNode.value != null) {
        sb.append(fieldNode.value).append(" ");
    }
    return sb.toString().trim();
}

Example 15 with FieldNode

use of org.objectweb.asm.tree.FieldNode in project LogisticsPipes by RS485.

the class DevEnvHelper method resolveField.

// returns actual owner of field
// or null if the field could not be resolved
private static String resolveField(String owner, String name, String desc, Mapping m) throws IOException {
    if (owner == null) {
        return null;
    }
    byte[] bytes = Launch.classLoader.getClassBytes(owner);
    if (bytes == null) {
        return null;
    }
    final ClassNode cn = new ClassNode();
    ClassReader reader = new ClassReader(bytes);
    reader.accept(cn, 0);
    for (FieldNode fn : cn.fields) {
        String newName = m.getField(owner, name);
        String newDesc = m.mapTypeDescriptor(desc);
        if (fn.name.equals(newName) && fn.desc.equals(newDesc)) {
            return owner;
        }
    }
    for (String i : cn.interfaces) {
        String result = DevEnvHelper.resolveField(i, name, desc, m);
        if (result != null) {
            return result;
        }
    }
    return DevEnvHelper.resolveField(cn.superName, name, desc, m);
}