List of usage examples for org.objectweb.asm MethodVisitor visitJumpInsn
public void visitJumpInsn(final int opcode, final Label label)
From source file:org.lanternpowered.server.event.filter.delegate.AllCauseFilterSourceDelegate.java
License:MIT License
@Override protected void insertTransform(MethodVisitor mv, Parameter param, Class<?> targetType, int local) { if (this.anno.ignoreEmpty()) { // Check that the list is not empty mv.visitVarInsn(ALOAD, local);/*from w w w.j av a 2s . c o m*/ Label success = new Label(); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "isEmpty", "()Z", true); mv.visitJumpInsn(IFEQ, success); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); } mv.visitVarInsn(ALOAD, local); mv.visitInsn(ICONST_0); mv.visitTypeInsn(ANEWARRAY, Type.getInternalName(targetType.getComponentType())); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "toArray", "([Ljava/lang/Object;)[Ljava/lang/Object;", true); mv.visitVarInsn(ASTORE, local); }
From source file:org.lanternpowered.server.event.filter.delegate.BeforeCauseFilterSourceDelegate.java
License:MIT License
@Override protected void insertTransform(MethodVisitor mv, Parameter param, Class<?> targetType, int local) { mv.visitVarInsn(ALOAD, local);//from w w w . j a v a2s . c o m Label failure = new Label(); Label success = new Label(); mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "isPresent", "()Z", false); mv.visitJumpInsn(IFEQ, failure); mv.visitVarInsn(ALOAD, local); mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "get", "()Ljava/lang/Object;", false); mv.visitVarInsn(ASTORE, local); mv.visitVarInsn(ALOAD, local); mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(targetType)); if (this.anno.typeFilter().length != 0) { mv.visitJumpInsn(IFEQ, failure); mv.visitVarInsn(ALOAD, local); // For each type we do an instance check and jump to either failure or success if matched for (int i = 0; i < this.anno.typeFilter().length; i++) { Class<?> filter = this.anno.typeFilter()[i]; if (i < this.anno.typeFilter().length - 1) { mv.visitInsn(DUP); } mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(filter)); if (this.anno.inverse()) { mv.visitJumpInsn(IFNE, failure); } else { mv.visitJumpInsn(IFNE, success); } } if (this.anno.inverse()) { mv.visitJumpInsn(GOTO, success); } // If the annotation was not reversed then we fall into failure as no types were matched } else { mv.visitJumpInsn(IFNE, success); } mv.visitLabel(failure); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); }
From source file:org.lanternpowered.server.event.filter.delegate.CancellationEventFilterDelegate.java
License:MIT License
@Override public int write(String name, ClassWriter cw, MethodVisitor mv, Method method, int locals) { if (!Cancellable.class.isAssignableFrom(method.getParameters()[0].getType())) { throw new IllegalStateException( "Attempted to filter a non-cancellable event type by its cancellation status"); }/* www . j a v a 2 s . c om*/ if (this.state == Tristate.UNDEFINED) { return locals; } mv.visitVarInsn(ALOAD, 1); mv.visitTypeInsn(CHECKCAST, Type.getInternalName(Cancellable.class)); mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(Cancellable.class), "isCancelled", "()Z", true); Label success = new Label(); if (this.state == Tristate.TRUE) { mv.visitJumpInsn(IFNE, success); } else { mv.visitJumpInsn(IFEQ, success); } mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); return locals; }
From source file:org.lanternpowered.server.event.filter.delegate.ExcludeSubtypeFilterDelegate.java
License:MIT License
@Override public int write(String name, ClassWriter cw, MethodVisitor mv, Method method, int locals) { // TODO could do an optimization here to inline a single instanceof if // the set would contain only a single member mv.visitVarInsn(ALOAD, 0);// w ww.ja va 2 s . co m mv.visitFieldInsn(GETFIELD, name, "classes", "Ljava/util/Set;"); // Loop through the classes set's members mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "iterator", "()Ljava/util/Iterator;", true); mv.visitVarInsn(ASTORE, locals); Label continueLabel = new Label(); mv.visitJumpInsn(GOTO, continueLabel); Label loopStart = new Label(); mv.visitLabel(loopStart); mv.visitVarInsn(ALOAD, locals); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true); mv.visitTypeInsn(CHECKCAST, "java/lang/Class"); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "isInstance", "(Ljava/lang/Object;)Z", false); mv.visitJumpInsn(Opcodes.IFEQ, continueLabel); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(continueLabel); mv.visitVarInsn(ALOAD, locals); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true); mv.visitJumpInsn(IFNE, loopStart); return locals + 1; }
From source file:org.lanternpowered.server.event.filter.delegate.GetterFilterSourceDelegate.java
License:MIT License
@Override public Tuple<Integer, Integer> write(ClassWriter cw, MethodVisitor mv, Method method, Parameter param, int local) { Class<?> targetType = param.getType(); Class<?> eventClass = method.getParameterTypes()[0]; String targetMethod = this.anno.value(); Method targetMethodObj;/* w w w . ja v a 2s . c o m*/ try { targetMethodObj = eventClass.getMethod(targetMethod); } catch (NoSuchMethodException e) { throw new IllegalArgumentException( String.format("Method %s specified by getter annotation was not found in type %s", targetMethod, eventClass.getName())); } if (targetMethodObj.getParameterCount() != 0) { throw new IllegalArgumentException("Method " + targetMethodObj.toGenericString() + " specified by getter annotation has non-zero parameter count"); } if (!targetMethodObj.getReturnType().equals(Optional.class) && !targetMethodObj.getReturnType().isAssignableFrom(targetType)) { throw new IllegalArgumentException( "Method " + targetMethodObj.toGenericString() + " does not return the correct type. Expected: " + targetType.getName() + " Found: " + targetMethodObj.getReturnType().getName()); } Type returnType = Type.getReturnType(targetMethodObj); Class<?> declaringClass = targetMethodObj.getDeclaringClass(); mv.visitVarInsn(ALOAD, 1); mv.visitTypeInsn(CHECKCAST, Type.getInternalName(declaringClass)); int op = declaringClass.isInterface() ? INVOKEINTERFACE : INVOKEVIRTUAL; mv.visitMethodInsn(op, Type.getInternalName(declaringClass), targetMethod, "()" + returnType.getDescriptor(), declaringClass.isInterface()); int paramLocal = local++; mv.visitVarInsn(returnType.getOpcode(ISTORE), paramLocal); if (!targetMethodObj.getReturnType().isPrimitive()) { Label failure = new Label(); Label success = new Label(); if (Optional.class.equals(targetMethodObj.getReturnType()) && !Optional.class.equals(targetType)) { // Unwrap the optional mv.visitVarInsn(ALOAD, paramLocal); mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "isPresent", "()Z", false); mv.visitJumpInsn(IFEQ, failure); mv.visitVarInsn(ALOAD, paramLocal); mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "get", "()Ljava/lang/Object;", false); mv.visitInsn(DUP); mv.visitVarInsn(ASTORE, paramLocal); } else { mv.visitVarInsn(returnType.getOpcode(ILOAD), paramLocal); } mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(targetType)); mv.visitJumpInsn(IFNE, success); mv.visitLabel(failure); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); } return new Tuple<>(local, paramLocal); }
From source file:org.lanternpowered.server.event.filter.delegate.HasDataFilterDelegate.java
License:MIT License
@Override public void write(ClassWriter cw, MethodVisitor mv, Method method, Parameter param, int localParam) { if (!DataHolder.class.isAssignableFrom(param.getType())) { throw new IllegalStateException("Annotated type for data filter is not a DataHolder"); }/*from w w w . ja va 2 s . co m*/ mv.visitVarInsn(ALOAD, localParam); mv.visitTypeInsn(CHECKCAST, Type.getInternalName(DataHolder.class)); mv.visitLdcInsn(Type.getType(this.anno.value())); mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(DataHolder.class), "get", "(Ljava/lang/Class;)Ljava/util/Optional;", true); mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/Optional", "isPresent", "()Z", false); Label success = new Label(); if (this.anno.inverse()) { mv.visitJumpInsn(IFEQ, success); } else { mv.visitJumpInsn(IFNE, success); } mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); }
From source file:org.lanternpowered.server.event.filter.delegate.IncludeSubtypeFilterDelegate.java
License:MIT License
@Override public int write(String name, ClassWriter cw, MethodVisitor mv, Method method, int locals) { // TODO could do an optimization here to inline a single instanceof if // the set would contain only a single member Label successLabel = new Label(); mv.visitVarInsn(ALOAD, 0);//ww w . j a v a 2 s .co m mv.visitFieldInsn(GETFIELD, name, "classes", "Ljava/util/Set;"); // Loop through the classes set's members mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "iterator", "()Ljava/util/Iterator;", true); mv.visitVarInsn(ASTORE, locals); Label continueLabel = new Label(); mv.visitJumpInsn(GOTO, continueLabel); Label loopStart = new Label(); mv.visitLabel(loopStart); mv.visitVarInsn(ALOAD, locals); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true); mv.visitTypeInsn(CHECKCAST, "java/lang/Class"); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "isInstance", "(Ljava/lang/Object;)Z", false); // If isInstance returns true, jump to success (jump over return) mv.visitJumpInsn(Opcodes.IFNE, successLabel); mv.visitLabel(continueLabel); mv.visitVarInsn(ALOAD, locals); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true); // If there are any classes left, continue looping. Otherwise, fail and return out (no @Include matches were found) mv.visitJumpInsn(IFNE, loopStart); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(successLabel); return locals + 1; }
From source file:org.lanternpowered.server.event.filter.delegate.RootCauseFilterSourceDelegate.java
License:MIT License
@Override protected void insertTransform(MethodVisitor mv, Parameter param, Class<?> targetType, int local) { Label failure = new Label(); Label success = new Label(); mv.visitVarInsn(ALOAD, local);/*from w w w . j av a 2 s .c o m*/ mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(targetType)); if (this.anno.typeFilter().length != 0) { mv.visitJumpInsn(IFEQ, failure); mv.visitVarInsn(ALOAD, local); // For each type we do an instance check and jump to either failure or success if matched for (int i = 0; i < this.anno.typeFilter().length; i++) { Class<?> filter = this.anno.typeFilter()[i]; if (i < this.anno.typeFilter().length - 1) { mv.visitInsn(DUP); } mv.visitTypeInsn(INSTANCEOF, Type.getInternalName(filter)); if (this.anno.inverse()) { mv.visitJumpInsn(IFNE, failure); } else { mv.visitJumpInsn(IFNE, success); } } if (this.anno.inverse()) { mv.visitJumpInsn(GOTO, success); } // If the annotation was not reversed then we fall into failure as no types were matched } else { mv.visitJumpInsn(IFNE, success); } mv.visitLabel(failure); mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); }
From source file:org.lanternpowered.server.event.filter.delegate.SupportsDataFilterDelegate.java
License:MIT License
@Override public void write(ClassWriter cw, MethodVisitor mv, Method method, Parameter param, int localParam) { if (!DataHolder.class.isAssignableFrom(param.getType())) { throw new IllegalStateException("Annotated type for data filter is not a DataHolder"); }/*from www .j a v a2 s . c o m*/ mv.visitVarInsn(ALOAD, localParam); mv.visitTypeInsn(CHECKCAST, Type.getInternalName(DataHolder.class)); mv.visitLdcInsn(Type.getType(this.anno.value())); mv.visitMethodInsn(INVOKEINTERFACE, Type.getInternalName(DataHolder.class), "supports", "(Ljava/lang/Class;)Z", true); Label success = new Label(); if (this.anno.inverse()) { mv.visitJumpInsn(IFEQ, success); } else { mv.visitJumpInsn(IFNE, success); } mv.visitInsn(ACONST_NULL); mv.visitInsn(ARETURN); mv.visitLabel(success); }
From source file:org.lwjglx.autostack.Transformer.java
License:Open Source License
public byte[] transform(ClassLoader loader, final String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) { try {/*from ww w. j a v a 2 s .com*/ if (className == null || className.startsWith("java/") || className.startsWith("sun/") || className.startsWith("jdk/internal/") || className.startsWith("org/lwjgl/")) return null; for (String pack : packages) if (!className.startsWith(pack)) return null; ClassReader cr = new ClassReader(classfileBuffer); final Map<String, Integer> stackMethods = new HashMap<String, Integer>(); // Scan all methods that need auto-stack if (debugTransform) System.out.println("[autostack] scanning methods in class: " + className.replace('/', '.')); cr.accept(new ClassVisitor(ASM7) { public MethodVisitor visitMethod(final int access, final String methodName, final String methodDesc, String signature, String[] exceptions) { if ((access & (ACC_NATIVE | ACC_ABSTRACT)) != 0) { // Don't try to analyze native or abstract methods. return null; } MethodVisitor mv = new MethodVisitor(ASM7) { boolean mark, catches, notransform, nostackparam, forcestack; public AnnotationVisitor visitAnnotation(String desc, boolean visible) { if ("Lorg/lwjglx/autostack/NoTransform;".equals(desc)) notransform = true; else if ("Lorg/lwjglx/autostack/NoStackParam;".equals(desc)) nostackparam = true; else if ("Lorg/lwjglx/autostack/UseNewStack;".equals(desc)) forcestack = true; return null; } public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { if (opcode == INVOKESTATIC && !itf && (owner.startsWith("org/lwjgl/") && (name.equals("mallocStack") || name.equals("callocStack")) || owner.equals(MEMORYSTACK) && (name.equals("stackGet") || name.equals("stackPop") || name.equals("stackPush") || name.startsWith("stackMalloc") || name.startsWith("stackCalloc") || name.startsWith("nstackMalloc") || name.startsWith("nstackCalloc") || name.equals("stackUTF8") || name.equals("stackASCII") || name.equals("stackUTF16") || name.equals("stackFloats") || name.equals("stackInts") || name.equals("stackBytes") || name.equals("stackShorts") || name.equals("stackPointers") || name.equals("stackLongs")))) { mark = true; } } public void visitTryCatchBlock(Label start, Label end, Label handler, String type) { catches = true; } public void visitEnd() { int flag = (access & ACC_PRIVATE) != 0 ? 8 : 0; flag |= nostackparam ? 16 : 0; if (mark || notransform || forcestack || nostackparam) { if (notransform) { flag |= 2; if (debugTransform) System.out.println("[autostack] will not transform method: " + className.replace('/', '.') + "." + methodName); } else { if (checkStack) flag |= 4; flag |= catches ? 1 : 0; if (debugTransform) System.out.println("[autostack] will transform method: " + className.replace('/', '.') + "." + methodName); } stackMethods.put(methodName + methodDesc, Integer.valueOf(flag)); } } }; return mv; } }, ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES); if (stackMethods.isEmpty()) return null; // Now, transform all such methods if (debugTransform) System.out.println("[autostack] transforming methods in class: " + className.replace('/', '.')); ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS); cr.accept(new ClassVisitor(ASM7, cw) { boolean classDefaultNewStack = defaultNewStack; boolean classNoTransform; @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { cv.visit(version, access, name, signature, superName, interfaces); if (!checkStack) { return; } /* Generate simple synthetic "compare stack pointers and throw if not equal" method */ MethodVisitor mv = cv.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, "$checkStack$", "(II)V", null, new String[] { "java/lang/AssertionError" }); { mv.visitCode(); mv.visitVarInsn(ILOAD, 0); mv.visitVarInsn(ILOAD, 1); Label l0 = new Label(); mv.visitJumpInsn(IF_ICMPEQ, l0); mv.visitTypeInsn(NEW, "java/lang/IllegalStateException"); mv.visitInsn(DUP); mv.visitTypeInsn(NEW, "java/lang/StringBuilder"); mv.visitInsn(DUP); mv.visitLdcInsn("Stack pointers differ: "); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false); mv.visitVarInsn(ILOAD, 0); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;", false); mv.visitLdcInsn(" != "); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false); mv.visitVarInsn(ILOAD, 1); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalStateException", "<init>", "(Ljava/lang/String;)V", false); mv.visitInsn(ATHROW); mv.visitLabel(l0); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitInsn(RETURN); mv.visitMaxs(5, 2); mv.visitEnd(); } mv = cv.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, "$checkStackWithThrowable$", "(Ljava/lang/Throwable;II)Ljava/lang/Throwable;", null, null); { mv.visitCode(); mv.visitVarInsn(ILOAD, 1); mv.visitVarInsn(ILOAD, 2); Label l0 = new Label(); mv.visitJumpInsn(IF_ICMPEQ, l0); mv.visitTypeInsn(NEW, "java/lang/IllegalStateException"); mv.visitInsn(DUP); mv.visitTypeInsn(NEW, "java/lang/StringBuilder"); mv.visitInsn(DUP); mv.visitLdcInsn("Stack pointers differ: "); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V", false); mv.visitVarInsn(ILOAD, 1); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;", false); mv.visitLdcInsn(" != "); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false); mv.visitVarInsn(ILOAD, 2); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(I)Ljava/lang/StringBuilder;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalStateException", "<init>", "(Ljava/lang/String;Ljava/lang/Throwable;)V", false); mv.visitInsn(ARETURN); mv.visitLabel(l0); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitVarInsn(ALOAD, 0); mv.visitInsn(ARETURN); mv.visitMaxs(5, 3); mv.visitEnd(); } } public AnnotationVisitor visitAnnotation(String desc, boolean visible) { if ("Lorg/lwjglx/autostack/UseCallerStack;".equals(desc)) { if (debugTransform) System.out.println( "[autostack] class declares to use caller stack for all methods, unless overridden by method"); classDefaultNewStack = false; return null; } else if ("Lorg/lwjglx/autostack/UseNewStack;".equals(desc)) { if (debugTransform) System.out.println( "[autostack] class declares to use new stack for all methods, unless overridden by method"); classDefaultNewStack = true; return null; } else if ("Lorg/lwjglx/autostack/NoTransform;".equals(desc)) { if (debugTransform) System.out.println("[autostack] class declares to not transform any methods"); classNoTransform = true; return null; } return cv.visitAnnotation(desc, visible); } public MethodVisitor visitMethod(final int access, final String name, final String desc, String signature, String[] exceptions) { Integer info = stackMethods.get(name + desc); if (info == null) return super.visitMethod(access, name, desc, signature, exceptions); boolean catches = (info.intValue() & 1) == 1; final boolean notransform = classNoTransform || (info.intValue() & 2) == 2; if (debugTransform && !notransform) System.out.println( "[autostack] transform method: " + className.replace('/', '.') + "." + name); final boolean memoryStackParam = stackAsParameter && (access & ACC_PRIVATE) != 0 && (info.intValue() & 16) == 0; MethodVisitor mv; final Type[] paramTypes = Type.getArgumentTypes(desc); final boolean isStatic = (access & ACC_STATIC) != 0; final boolean isConstructor = "<init>".equals(name); if (memoryStackParam) { if (debugTransform) System.out.println( "[autostack] changing signature of method to add additional MemoryStack parameter"); // Add additional MemoryStack parameter to the method signature index of the local stays the same int paramEndIndex = desc.indexOf(')'); String beforeDesc = desc.substring(0, paramEndIndex); String afterDesc = desc.substring(paramEndIndex); mv = super.visitMethod(access | ACC_SYNTHETIC, name, beforeDesc + "L" + MEMORYSTACK + ";" + afterDesc, signature, exceptions); // Re-introduce the original method which just delegates if (debugTransform) System.out.println("[autostack] adding delegate method with original signature"); MethodVisitor omv = super.visitMethod(access, name, desc, signature, exceptions); omv.visitCode(); int param = 0; if (!isStatic) { omv.visitVarInsn(ALOAD, 0); param++; } for (int i = 0; i < paramTypes.length; i++) { omv.visitVarInsn(paramTypes[i].getOpcode(ILOAD), param); param += paramTypes[i].getSize(); } omv.visitMethodInsn(INVOKESTATIC, MEMORYSTACK, "stackGet", "()L" + MEMORYSTACK + ";", false); boolean isPrivate = (access & ACC_PRIVATE) != 0; int opcode = isStatic ? INVOKESTATIC : isPrivate ? INVOKESPECIAL : INVOKEVIRTUAL; omv.visitMethodInsn(opcode, className, name, beforeDesc + "L" + MEMORYSTACK + ";" + afterDesc, false); Type retType = Type.getReturnType(desc); omv.visitInsn(retType.getOpcode(IRETURN)); omv.visitMaxs(-1, -1); omv.visitEnd(); } else { mv = super.visitMethod(access, name, desc, signature, exceptions); } if (catches) mv = new TryCatchBlockSorter(mv, access, name, desc, signature, exceptions); mv = new MethodVisitor(ASM7, mv) { Label tryLabel = new Label(); Label finallyLabel = new Label(); int lastLine = 0; boolean newStack = classDefaultNewStack; int stackVarIndex; int stackPointerVarIndex; int firstAdditionalLocal; int additionalLocals; Object[] replacedLocals; public void visitInsn(int opcode) { if (notransform) { mv.visitInsn(opcode); return; } if (opcode >= IRETURN && opcode <= RETURN && (newStack || checkStack)) { if (debugRuntime && newStack && !checkStack) { mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("[autostack] restore stack pointer because of return at " + className.replace('/', '.') + "." + name + ":" + lastLine); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); } if (newStack && !checkStack) { mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitVarInsn(ILOAD, stackPointerVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "setPointer", "(I)V", false); } else if (checkStack) { mv.visitVarInsn(ILOAD, stackPointerVarIndex); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "getPointer", "()I", false); mv.visitMethodInsn(INVOKESTATIC, className, "$checkStack$", "(II)V", false); } } mv.visitInsn(opcode); } public AnnotationVisitor visitAnnotation(String desc, boolean visible) { if ("Lorg/lwjglx/autostack/UseCallerStack;".equals(desc)) { if (!notransform) { if (debugTransform) System.out.println("[autostack] method declares to use caller stack"); newStack = false; } return null; } else if ("Lorg/lwjglx/autostack/UseNewStack;".equals(desc)) { if (!notransform) { if (debugTransform) System.out.println("[autostack] method declares to use new stack"); newStack = true; } return null; } else if ("Lorg/lwjglx/autostack/NoTransform;".equals(desc)) { return null; } else if ("Lorg/lwjglx/autostack/NoStackParam;".equals(desc)) { return null; } return mv.visitAnnotation(desc, visible); } public void visitVarInsn(int opcode, int var) { if (notransform) { mv.visitVarInsn(opcode, var); return; } if (var >= firstAdditionalLocal) var += additionalLocals; mv.visitVarInsn(opcode, var); } public void visitIincInsn(int var, int increment) { if (notransform) { mv.visitIincInsn(var, increment); return; } if (var >= firstAdditionalLocal) var += additionalLocals; mv.visitIincInsn(var, increment); } public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) { if (notransform) { mv.visitFrame(type, nLocal, local, nStack, stack); return; } if (type == F_FULL) { int noThis = isStatic ? 0 : 1; Object[] locals = new Object[local.length + additionalLocals]; if (!isStatic) locals[0] = local[0]; int replacementLength = replacedLocals.length; System.arraycopy(replacedLocals, noThis, locals, noThis, replacementLength - noThis); int len = locals.length - replacementLength; System.arraycopy(local, replacementLength - additionalLocals, locals, replacementLength, len); mv.visitFrame(type, nLocal + additionalLocals, locals, nStack, stack); } else mv.visitFrame(type, nLocal, local, nStack, stack); } public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) { if (notransform) { mv.visitLocalVariable(name, desc, signature, start, end, index); return; } if (index >= firstAdditionalLocal) index += additionalLocals; mv.visitLocalVariable(name, desc, signature, start, end, index); } private boolean doesNotTakeStackItself(String desc) { return desc.lastIndexOf("L" + MEMORYSTACK + ";)") == -1; } public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { String completeName = name + desc; Integer info = stackMethods.get(completeName); if (opcode != INVOKESTATIC || notransform) { mv.visitMethodInsn(opcode, owner, name, desc, itf); return; } if (stackAsParameter && info != null && (info.intValue() & 8) != 0 && (info.intValue() & 16) == 0) { /* Rewrite invocation to have additional MemoryStack parameter */ if (debugTransform) System.out.println( "[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> " + owner.replace('/', '.') + "." + name + "(..., MemoryStack)"); int paramEndIndex = desc.indexOf(')'); String beforeDesc = desc.substring(0, paramEndIndex); String afterDesc = desc.substring(paramEndIndex); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitMethodInsn(opcode, owner, name, beforeDesc + "L" + MEMORYSTACK + ";" + afterDesc, itf); return; } if (owner.startsWith("org/lwjgl/") && (name.equals("mallocStack") || name.equals("callocStack")) && doesNotTakeStackItself(desc)) { if (debugTransform) System.out.println( "[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokestatic " + owner.replace('/', '.') + "." + name); mv.visitVarInsn(ALOAD, stackVarIndex); int paramEndIndex = desc.indexOf(')'); String beforeDesc = desc.substring(0, paramEndIndex); String afterDesc = desc.substring(paramEndIndex); mv.visitMethodInsn(opcode, owner, name, beforeDesc + "L" + MEMORYSTACK + ";" + afterDesc, false); } else if (owner.equals(MEMORYSTACK) && name.equals("stackGet")) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex); mv.visitVarInsn(ALOAD, stackVarIndex); } else if (owner.equals(MEMORYSTACK) && (name.equals("stackPush") || name.equals("stackPop"))) { String newName = "p" + name.substring(6); if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (owner.equals(MEMORYSTACK) && (name.startsWith("stackMalloc") || name.startsWith("stackCalloc"))) { String newName = name.substring(5, 6).toLowerCase() + name.substring(6); if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(SWAP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (owner.equals(MEMORYSTACK) && (name.startsWith("nstackMalloc") || name.startsWith("nstackCalloc"))) { String newName = "n" + name.substring(6, 7).toLowerCase() + name.substring(7); if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); if ("(I)J".equals(desc)) { mv.visitInsn(SWAP); } else { // (II)J mv.visitInsn(DUP_X2); mv.visitInsn(POP); } mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (owner.equals(MEMORYSTACK) && (name.equals("stackASCII") || name.equals("stackUTF8") || name.equals("stackUTF16"))) { String newName = name.substring(5); boolean withBoolean = desc.startsWith("(Ljava/lang/CharSequence;Z"); if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); if (withBoolean) { mv.visitInsn(DUP_X2); mv.visitInsn(POP); } else { mv.visitInsn(SWAP); } mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (owner.equals(MEMORYSTACK) && (name.equals("stackFloats") || name.equals("stackInts") || name.equals("stackBytes") || name.equals("stackShorts") || name.equals("stackPointers") && (desc.startsWith("([Lorg/lwjgl/system/Pointer;") || desc.startsWith("(Lorg/lwjgl/system/Pointer;")))) { String newName = name.substring(5, 6).toLowerCase() + name.substring(6); Type[] argTypes = Type.getArgumentTypes(desc); if (argTypes.length == 1 && argTypes[0].getSort() == Type.ARRAY) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(SWAP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (argTypes.length == 1) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(SWAP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (argTypes.length == 2) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(DUP_X2); mv.visitInsn(POP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (argTypes.length == 3) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(DUP2_X2); mv.visitInsn(POP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); mv.visitInsn(SWAP); mv.visitInsn(POP); } else { if (debugTransform) System.out.println("[autostack] failed to rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + ". Not yet implemented."); /* Give up. Not possible without an additional local */ mv.visitMethodInsn(INVOKESTATIC, MEMORYSTACK, name, desc, itf); } } else if (owner.equals(MEMORYSTACK) && name.equals("stackLongs")) { String newName = name.substring(5, 6).toLowerCase() + name.substring(6); Type[] argTypes = Type.getArgumentTypes(desc); if (argTypes.length == 1 && argTypes[0].getSort() == Type.ARRAY) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(SWAP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else if (argTypes.length == 1) { if (debugTransform) System.out.println("[autostack] rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + " --> aload " + stackVarIndex + "; invokevirtual " + MEMORYSTACK.replace('/', '.') + "." + newName); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitInsn(DUP_X2); mv.visitInsn(POP); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, newName, desc, itf); } else { if (debugTransform) System.out.println("[autostack] failed to rewrite invocation of " + owner.replace('/', '.') + "." + name + " at line " + lastLine + ". Not yet implemented."); /* Give up. Not possible without an additional local */ mv.visitMethodInsn(INVOKESTATIC, MEMORYSTACK, name, desc, itf); } } else { mv.visitMethodInsn(opcode, owner, name, desc, itf); } } public void visitLineNumber(int line, Label start) { mv.visitLineNumber(line, start); lastLine = line; } public void visitCode() { if (notransform) { mv.visitCode(); return; } additionalLocals = newStack || checkStack ? 2 : 1; replacedLocals = new Object[paramTypes.length + additionalLocals + (isStatic ? 0 : 1)]; if (!newStack && !checkStack) { replacedLocals[replacedLocals.length - 1] = MEMORYSTACK; } else { replacedLocals[replacedLocals.length - 2] = MEMORYSTACK; replacedLocals[replacedLocals.length - 1] = INTEGER; } if (!isStatic) replacedLocals[0] = isConstructor ? TOP : className; int var = isStatic ? 0 : 1; for (int t = 0, i = var; t < paramTypes.length; t++, i++) { Type type = paramTypes[t]; var += type.getSize(); switch (type.getSort()) { case Type.INT: case Type.BYTE: case Type.BOOLEAN: case Type.SHORT: case Type.CHAR: replacedLocals[i] = INTEGER; break; case Type.LONG: replacedLocals[i] = LONG; break; case Type.FLOAT: replacedLocals[i] = FLOAT; break; case Type.DOUBLE: replacedLocals[i] = DOUBLE; break; case Type.OBJECT: case Type.ARRAY: replacedLocals[i] = type.getInternalName(); break; default: throw new AssertionError("Unhandled parameter type: " + type); } } firstAdditionalLocal = var; stackVarIndex = var; stackPointerVarIndex = var + 1; mv.visitCode(); if (newStack && !checkStack || checkStack) { if (!memoryStackParam) { mv.visitMethodInsn(INVOKESTATIC, MEMORYSTACK, "stackGet", "()L" + MEMORYSTACK + ";", false); mv.visitInsn(DUP); mv.visitVarInsn(ASTORE, stackVarIndex); } else { mv.visitVarInsn(ALOAD, stackVarIndex); } mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "getPointer", "()I", false); mv.visitVarInsn(ISTORE, stackPointerVarIndex); if (debugRuntime && newStack && !checkStack) { mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("[autostack] save stack pointer ["); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitVarInsn(ILOAD, stackPointerVarIndex); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "toString", "(I)Ljava/lang/String;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("] at begin of " + className.replace('/', '.') + "." + name); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); } mv.visitLabel(tryLabel); if (!memoryStackParam) mv.visitFrame(F_APPEND, 2, new Object[] { MEMORYSTACK, INTEGER }, 0, null); else mv.visitFrame(F_APPEND, 1, new Object[] { INTEGER }, 0, null); } else if (!newStack && !checkStack) { if (!memoryStackParam) { mv.visitMethodInsn(INVOKESTATIC, MEMORYSTACK, "stackGet", "()L" + MEMORYSTACK + ";", false); mv.visitVarInsn(ASTORE, stackVarIndex); } if (debugRuntime) { mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("[autostack] current stack pointer is ["); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "getPointer", "()I", false); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "toString", "(I)Ljava/lang/String;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("] at begin of " + className.replace('/', '.') + "." + name); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); } mv.visitLabel(tryLabel); if (!memoryStackParam) mv.visitFrame(F_APPEND, 1, new Object[] { MEMORYSTACK }, 0, null); } } public void visitMaxs(int maxStack, int maxLocals) { if (notransform) { mv.visitMaxs(maxStack, maxLocals); return; } if (newStack && !checkStack || checkStack) { mv.visitLabel(finallyLabel); mv.visitFrame(F_FULL, replacedLocals.length, replacedLocals, 1, new Object[] { "java/lang/Throwable" }); mv.visitTryCatchBlock(tryLabel, finallyLabel, finallyLabel, null); if (debugRuntime && newStack && !checkStack) { mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("[autostack] restore stack pointer because of throw ["); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitInsn(DUP); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitInsn(SWAP); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn( "] at " + className.replace('/', '.') + "." + name + ":" + lastLine); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); } if (newStack && !checkStack) { mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitVarInsn(ILOAD, stackPointerVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "setPointer", "(I)V", false); } if (checkStack) { mv.visitVarInsn(ILOAD, stackPointerVarIndex); mv.visitVarInsn(ALOAD, stackVarIndex); mv.visitMethodInsn(INVOKEVIRTUAL, MEMORYSTACK, "getPointer", "()I", false); mv.visitMethodInsn(INVOKESTATIC, className, "$checkStackWithThrowable$", "(Ljava/lang/Throwable;II)Ljava/lang/Throwable;", false); } mv.visitInsn(ATHROW); } mv.visitMaxs(-1, maxLocals + additionalLocals); } }; return mv; } }, 0); byte[] arr = cw.toByteArray(); if (trace) { cr = new ClassReader(arr); cr.accept(new TraceClassVisitor(new PrintWriter(System.out)), 0); } return arr; } catch (Throwable t) { t.printStackTrace(); throw new RuntimeException(t); } }