List of usage examples for org.objectweb.asm MethodVisitor visitMaxs
public void visitMaxs(final int maxStack, final int maxLocals)
From source file:Java6to2.java
License:Open Source License
private static byte[] transform(InputStream classfile) throws IOException { ClassReader cr = new ClassReader(classfile); ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); ClassVisitor cv = new ClassVisitor(ASM7, cw) { String internalName;// w w w. ja va 2 s . com boolean classLookupMethodGenerated; Set fieldsGenerated = new HashSet(); public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { /* Change class file version to 1.2 */ cv.visit(V1_2, access, name, signature, superName, interfaces); this.internalName = name; } /** * Generates the synthetic "class$" method, used to lookup classes via Class.forName(). This uses the exact same code as does JDK8 javac for target 1.2. */ void generateSyntheticClassLookupMethod() { MethodVisitor mv = cv.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, "class$", "(Ljava/lang/String;)Ljava/lang/Class;", null, null); { Label start = new Label(); Label end = new Label(); Label handler = new Label(); mv.visitTryCatchBlock(start, end, handler, "java/lang/ClassNotFoundException"); mv.visitLabel(start); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESTATIC, "java/lang/Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;", false); mv.visitLabel(end); mv.visitInsn(ARETURN); mv.visitLabel(handler); mv.visitVarInsn(ASTORE, 1); mv.visitTypeInsn(NEW, "java/lang/NoClassDefFoundError"); mv.visitInsn(DUP); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/NoClassDefFoundError", "<init>", "()V", false); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/NoClassDefFoundError", "initCause", "(Ljava/lang/Throwable;)Ljava/lang/Throwable;", false); mv.visitInsn(ATHROW); } mv.visitMaxs(2, 2); mv.visitEnd(); } public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { MethodVisitor mv = super.visitMethod(access, name, desc, signature, exceptions); final ClassVisitor cv = this.cv; return new MethodVisitor(ASM7, mv) { /** * Intercepts class instantiations to see whether they instantiate a StringBuilder. Those instructions were generated by javac for string concatenations. But * StringBuilder is not available on JRE1.2, so we just replace it with StringBuffer. */ public void visitTypeInsn(int opcode, String type) { if (opcode == NEW && "java/lang/StringBuilder".equals(type)) { mv.visitTypeInsn(opcode, "java/lang/StringBuffer"); } else { mv.visitTypeInsn(opcode, type); } } /** * Intercepts method invocations to see whether they do something with StringBuilder. Those instructions were generated by javac for string concatenations. But * StringBuilder is not available on JRE1.2, so we just replace it with StringBuffer. */ public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { if ("java/lang/StringBuilder".equals(owner)) { mv.visitMethodInsn(opcode, "java/lang/StringBuffer", name, desc.replace("java/lang/StringBuilder", "java/lang/StringBuffer"), itf); } else { mv.visitMethodInsn(opcode, owner, name, desc, itf); } } /** * Intercepts LDC instructions and check whether they are used to load a class. This is not supported on Java 1.2, so we convert it to the same code used by the * JDK8 javac: * <ul> * <li>create synthetic fields holding the resolved class objects * <li>create a synthetic method called "class$" which does Class.forName * </ul> */ public void visitLdcInsn(Object cst) { if (cst instanceof Type) { Type t = (Type) cst; String syntheticField = "class$" + t.getInternalName().replace('/', '$').replace("[", ""); if (!classLookupMethodGenerated) { /* Emit the synthetic "class$" method, used to lookup classes via Class.forName() */ generateSyntheticClassLookupMethod(); classLookupMethodGenerated = true; } if (!fieldsGenerated.contains(syntheticField)) { /* Generate a synthetic field holding the resolved Class object */ cv.visitField(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, syntheticField, "Ljava/lang/Class;", null, null); fieldsGenerated.add(syntheticField); } mv.visitFieldInsn(GETSTATIC, internalName, syntheticField, "Ljava/lang/Class;"); Label nonNull = new Label(); mv.visitJumpInsn(IFNONNULL, nonNull); mv.visitLdcInsn(t.getInternalName().replace('/', '.')); mv.visitMethodInsn(INVOKESTATIC, internalName, "class$", "(Ljava/lang/String;)Ljava/lang/Class;", false); mv.visitInsn(DUP); mv.visitFieldInsn(PUTSTATIC, internalName, syntheticField, "Ljava/lang/Class;"); Label cnt = new Label(); mv.visitJumpInsn(GOTO, cnt); mv.visitLabel(nonNull); mv.visitFieldInsn(GETSTATIC, internalName, syntheticField, "Ljava/lang/Class;"); mv.visitLabel(cnt); } else { mv.visitLdcInsn(cst); } } }; } }; cr.accept(cv, ClassReader.SKIP_FRAMES); // <- Frames are not used in Java 1.2, so skip them return cw.toByteArray(); }
From source file:asm.de.qaware.campus.secpro.agent.impl.AdminServiceImplDump.java
License:Open Source License
public static byte[] dump() throws Exception { ClassWriter cw = new ClassWriter(0); FieldVisitor fv;/*from ww w . j a va 2 s .c om*/ MethodVisitor mv; AnnotationVisitor av0; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", null, "java/lang/Object", new String[] { "de/qaware/campus/secpro/agent/LoginService" }); // this here is the static LOGINS map { fv = cw.visitField(ACC_FINAL + ACC_STATIC, "LOGINS", "Ljava/util/Map;", "Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;", null); fv.visitEnd(); } // this here is the default constructor { mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } // this here is the canLogin method { mv = cw.visitMethod(ACC_PUBLIC, "canLogin", "(Ljava/lang/String;Ljava/lang/String;)Z", null, null); mv.visitCode(); mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitTypeInsn(CHECKCAST, "java/lang/String"); mv.visitVarInsn(ASTORE, 3); mv.visitVarInsn(ALOAD, 3); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals", "(Ljava/lang/Object;Ljava/lang/Object;)Z", false); mv.visitInsn(IRETURN); mv.visitMaxs(2, 4); mv.visitEnd(); } // this here is the static initializer { mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null); mv.visitCode(); mv.visitMethodInsn(INVOKESTATIC, "com/google/common/collect/Maps", "newHashMap", "()Ljava/util/HashMap;", false); mv.visitFieldInsn(PUTSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/LoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitLdcInsn("admin"); mv.visitLdcInsn("Mellon"); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitInsn(POP); mv.visitInsn(RETURN); mv.visitMaxs(3, 0); mv.visitEnd(); } cw.visitEnd(); return cw.toByteArray(); }
From source file:asm.de.qaware.campus.secpro.agent.impl.EavesdropAdminServiceImplDump.java
License:Open Source License
public static byte[] dump() throws Exception { ClassWriter cw = new ClassWriter(0); FieldVisitor fv;//w ww . ja v a 2 s. c o m MethodVisitor mv; AnnotationVisitor av0; cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "de/qaware/campus/secpro/agent/impl/EavesdropLoginServiceImpl", null, "java/lang/Object", new String[] { "de/qaware/campus/secpro/agent/LoginService" }); // this here is the static LOGINS map { fv = cw.visitField(ACC_PRIVATE + ACC_FINAL + ACC_STATIC, "LOGINS", "Ljava/util/Map;", "Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;", null); fv.visitEnd(); } // this here is the default constructor { mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } // this here is the modified canLogin method { mv = cw.visitMethod(ACC_PUBLIC, "canLogin", "(Ljava/lang/String;Ljava/lang/String;)Z", null, null); mv.visitCode(); // this here will place the method params on the call stack and // invoke the static eavesdrop method mv.visitVarInsn(ALOAD, 1); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKESTATIC, "de/qaware/campus/secpro/part03/TrojanCredentialStore", "eavesdrop", "(Ljava/lang/String;Ljava/lang/String;)V", false); // continue as usual mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/EavesdropLoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitVarInsn(ALOAD, 1); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitTypeInsn(CHECKCAST, "java/lang/String"); mv.visitVarInsn(ASTORE, 3); mv.visitVarInsn(ALOAD, 3); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals", "(Ljava/lang/Object;Ljava/lang/Object;)Z", false); mv.visitInsn(IRETURN); mv.visitMaxs(2, 4); mv.visitEnd(); } // this here is the static initializer { mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null); mv.visitCode(); mv.visitMethodInsn(INVOKESTATIC, "com/google/common/collect/Maps", "newHashMap", "()Ljava/util/HashMap;", false); mv.visitFieldInsn(PUTSTATIC, "de/qaware/campus/secpro/agent/impl/EavesdropLoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitFieldInsn(GETSTATIC, "de/qaware/campus/secpro/agent/impl/EavesdropLoginServiceImpl", "LOGINS", "Ljava/util/Map;"); mv.visitLdcInsn("admin"); mv.visitLdcInsn("Mellon"); mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", true); mv.visitInsn(POP); mv.visitInsn(RETURN); mv.visitMaxs(3, 0); mv.visitEnd(); } cw.visitEnd(); return cw.toByteArray(); }
From source file:ataspectj.UnweavableTest.java
License:Open Source License
ISome getJit() {
ClassWriter cw = new ClassWriter(true, true);
cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "ataspectj/ISomeGen", null, "java/lang/Object",
new String[] { "ataspectj/UnweavableTest$ISome" });
AnnotationVisitor av = cw.visitAnnotation("Lataspectj/UnweavableTest$ASome;", true);
av.visitEnd();/*w ww . jav a 2 s . co m*/
MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(0, 0);
mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "giveOne", "()I", null, new String[0]);
mv.visitInsn(Opcodes.ICONST_2);
mv.visitInsn(Opcodes.IRETURN);
mv.visitMaxs(0, 0);
cw.visitEnd();
try {
ClassLoader loader = this.getClass().getClassLoader();
Method def = ClassLoader.class.getDeclaredMethod("defineClass",
new Class[] { String.class, byte[].class, int.class, int.class });
def.setAccessible(true);
Class gen = (Class) def.invoke(loader, "ataspectj.ISomeGen", cw.toByteArray(), 0,
cw.toByteArray().length);
return (ISome) gen.newInstance();
} catch (Throwable t) {
fail(t.toString());
return null;
}
}
From source file:ataspectj.UnweavableTest.java
License:Open Source License
Serializable getJitNoMatch() {
ClassWriter cw = new ClassWriter(true, true);
cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, "ataspectj/unmatched/Gen", null, "java/lang/Object",
new String[] { "java/io/Serializable" });
MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, new String[0]);
mv.visitVarInsn(Opcodes.ALOAD, 0);//from w ww. j av a 2 s .c om
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(Opcodes.RETURN);
mv.visitMaxs(0, 0);
cw.visitEnd();
try {
ClassLoader loader = this.getClass().getClassLoader();
Method def = ClassLoader.class.getDeclaredMethod("defineClass",
new Class[] { String.class, byte[].class, int.class, int.class });
def.setAccessible(true);
Class gen = (Class) def.invoke(loader, "ataspectj.unmatched.Gen", cw.toByteArray(), 0,
cw.toByteArray().length);
return (Serializable) gen.newInstance();
} catch (Throwable t) {
fail(t.toString());
return null;
}
}
From source file:autostack.Transformer.java
License:Open Source License
public byte[] transform(ClassLoader loader, final String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) { try {//from w ww. ja va 2s .c om 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(ASM5) { 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(ASM5) { boolean mark, catches, notransform, nostackparam, forcestack; public AnnotationVisitor visitAnnotation(String desc, boolean visible) { if ("Lautostack/NoTransform;".equals(desc)) notransform = true; else if ("Lautostack/NoStackParam;".equals(desc)) nostackparam = true; else if ("Lautostack/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.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(ASM5, 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 ("Lautostack/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 ("Lautostack/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 ("Lautostack/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(ASM5, 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 ("Lautostack/UseCallerStack;".equals(desc)) { if (!notransform) { if (debugTransform) System.out.println("[autostack] method declares to use caller stack"); newStack = false; } return null; } else if ("Lautostack/UseNewStack;".equals(desc)) { if (!notransform) { if (debugTransform) System.out.println("[autostack] method declares to use new stack"); newStack = true; } return null; } else if ("Lautostack/NoTransform;".equals(desc)) { return null; } else if ("Lautostack/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(className, 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.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); } }
From source file:blockphysics.asm.BPTransformer.java
License:Open Source License
private byte[] transformExtendedBlockStorage(byte[] bytes) { /*try// w w w . j a v a 2s . c o m { FileOutputStream fos = new FileOutputStream("d:/ExtendedBlockStorage.orig.class"); fos.write(bytes); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ System.out.print("[BlockPhysics] Patching ExtendedBlockStorage.class ...."); boolean ok = false; ClassNode classNode = new ClassNode(); ClassReader classReader = new ClassReader(bytes); classReader.accept(classNode, 0); MethodNode m; Iterator<MethodNode> methods = classNode.methods.iterator(); while (methods.hasNext()) { m = methods.next(); if (m.name.equals("<init>") && m.desc.equals("(IZ)V")) { for (int index = m.instructions.size() - 1; index >= 0; index--) { if (m.instructions.get(index).getOpcode() == RETURN) { InsnList toInject = new InsnList(); //toInject.add(new FrameNode(Opcodes.F_FULL, 3, new Object[] {"abx", Opcodes.INTEGER, Opcodes.INTEGER}, 0, new Object[] {})); toInject.add(new VarInsnNode(ALOAD, 0)); toInject.add(new IntInsnNode(SIPUSH, 4096)); toInject.add(new IntInsnNode(NEWARRAY, T_BYTE)); toInject.add(new FieldInsnNode(PUTFIELD, "adr", "blockBPdataArray", "[B")); m.instructions.insertBefore(m.instructions.get(index), toInject); ok = true; break; } } } } ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); classNode.accept(cw); MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "getBlockBPdata", "(III)I", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adr", "blockBPdataArray", "[B"); mv.visitVarInsn(ILOAD, 2); mv.visitIntInsn(SIPUSH, 256); mv.visitInsn(IMUL); mv.visitVarInsn(ILOAD, 1); mv.visitIntInsn(BIPUSH, 16); mv.visitInsn(IMUL); mv.visitInsn(IADD); mv.visitVarInsn(ILOAD, 3); mv.visitInsn(IADD); mv.visitInsn(BALOAD); mv.visitInsn(IRETURN); mv.visitMaxs(4, 4); mv.visitEnd(); mv = cw.visitMethod(ACC_PUBLIC, "setBlockBPdata", "(IIII)V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adr", "blockBPdataArray", "[B"); mv.visitVarInsn(ILOAD, 2); mv.visitIntInsn(SIPUSH, 256); mv.visitInsn(IMUL); mv.visitVarInsn(ILOAD, 1); mv.visitIntInsn(BIPUSH, 16); mv.visitInsn(IMUL); mv.visitInsn(IADD); mv.visitVarInsn(ILOAD, 3); mv.visitInsn(IADD); mv.visitVarInsn(ILOAD, 4); mv.visitInsn(I2B); mv.visitInsn(BASTORE); mv.visitInsn(RETURN); mv.visitMaxs(4, 5); mv.visitEnd(); mv = cw.visitMethod(ACC_PUBLIC, "getBPdataArray", "()[B", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adr", "blockBPdataArray", "[B"); mv.visitInsn(ARETURN); mv.visitMaxs(1, 1); mv.visitEnd(); mv = cw.visitMethod(ACC_PUBLIC, "setBPdataArray", "([B)V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitVarInsn(ALOAD, 1); mv.visitFieldInsn(PUTFIELD, "adr", "blockBPdataArray", "[B"); mv.visitInsn(RETURN); mv.visitMaxs(2, 2); mv.visitEnd(); FieldVisitor fv; fv = cw.visitField(ACC_PRIVATE, "blockBPdataArray", "[B", null, null); fv.visitEnd(); cw.visitEnd(); if (ok) System.out.println("OK"); else System.out.println("Failed." + ok); /*try { FileOutputStream fos = new FileOutputStream("d:/ExtendedBlockStorage.mod.class"); fos.write(cw.toByteArray()); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ return cw.toByteArray(); }
From source file:blockphysics.asm.BPTransformer.java
License:Open Source License
private byte[] transformChunk(byte[] bytes) { /*try//ww w . j a v a 2 s . co m { FileOutputStream fos = new FileOutputStream("d:/Chunk.orig.class"); fos.write(bytes); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ System.out.print("[BlockPhysics] Patching Chunk.class ..................."); ClassNode classNode = new ClassNode(); ClassReader classReader = new ClassReader(bytes); classReader.accept(classNode, 0); ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); classNode.accept(cw); MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "getBlockBPdata", "(III)I", null, null); mv.visitCode(); mv.visitVarInsn(ILOAD, 2); mv.visitInsn(ICONST_4); mv.visitInsn(ISHR); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adq", "r", "[Ladr;"); mv.visitInsn(ARRAYLENGTH); Label l0 = new Label(); mv.visitJumpInsn(IF_ICMPLT, l0); mv.visitInsn(ICONST_0); mv.visitInsn(IRETURN); mv.visitLabel(l0); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adq", "r", "[Ladr;"); mv.visitVarInsn(ILOAD, 2); mv.visitInsn(ICONST_4); mv.visitInsn(ISHR); mv.visitInsn(AALOAD); mv.visitVarInsn(ASTORE, 4); mv.visitVarInsn(ALOAD, 4); Label l1 = new Label(); mv.visitJumpInsn(IFNULL, l1); mv.visitVarInsn(ALOAD, 4); mv.visitVarInsn(ILOAD, 1); mv.visitVarInsn(ILOAD, 2); mv.visitIntInsn(BIPUSH, 15); mv.visitInsn(IAND); mv.visitVarInsn(ILOAD, 3); mv.visitMethodInsn(INVOKEVIRTUAL, "adr", "getBlockBPdata", "(III)I"); Label l2 = new Label(); mv.visitJumpInsn(GOTO, l2); mv.visitLabel(l1); mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "adr" }, 0, null); mv.visitInsn(ICONST_0); mv.visitLabel(l2); mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] { Opcodes.INTEGER }); mv.visitInsn(IRETURN); mv.visitMaxs(4, 5); mv.visitEnd(); mv = cw.visitMethod(ACC_PUBLIC, "setBlockBPdata", "(IIII)Z", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitFieldInsn(GETFIELD, "adq", "r", "[Ladr;"); mv.visitVarInsn(ILOAD, 2); mv.visitInsn(ICONST_4); mv.visitInsn(ISHR); mv.visitInsn(AALOAD); mv.visitVarInsn(ASTORE, 5); mv.visitVarInsn(ALOAD, 5); Label lab0 = new Label(); mv.visitJumpInsn(IFNONNULL, lab0); mv.visitInsn(ICONST_0); mv.visitInsn(IRETURN); mv.visitLabel(lab0); mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { "adr" }, 0, null); mv.visitVarInsn(ALOAD, 5); mv.visitVarInsn(ILOAD, 1); mv.visitVarInsn(ILOAD, 2); mv.visitIntInsn(BIPUSH, 15); mv.visitInsn(IAND); mv.visitVarInsn(ILOAD, 3); mv.visitMethodInsn(INVOKEVIRTUAL, "adr", "getBlockBPdata", "(III)I"); mv.visitVarInsn(ISTORE, 6); mv.visitVarInsn(ILOAD, 6); mv.visitVarInsn(ILOAD, 4); Label lab1 = new Label(); mv.visitJumpInsn(IF_ICMPNE, lab1); mv.visitInsn(ICONST_0); mv.visitInsn(IRETURN); mv.visitLabel(lab1); mv.visitFrame(Opcodes.F_APPEND, 1, new Object[] { Opcodes.INTEGER }, 0, null); mv.visitVarInsn(ALOAD, 0); mv.visitInsn(ICONST_1); mv.visitFieldInsn(PUTFIELD, "adq", "l", "Z"); mv.visitVarInsn(ALOAD, 5); mv.visitVarInsn(ILOAD, 1); mv.visitVarInsn(ILOAD, 2); mv.visitIntInsn(BIPUSH, 15); mv.visitInsn(IAND); mv.visitVarInsn(ILOAD, 3); mv.visitVarInsn(ILOAD, 4); mv.visitMethodInsn(INVOKEVIRTUAL, "adr", "setBlockBPdata", "(IIII)V"); mv.visitInsn(ICONST_1); mv.visitInsn(IRETURN); mv.visitMaxs(5, 7); mv.visitEnd(); cw.visitEnd(); System.out.println("OK"); /*try { FileOutputStream fos = new FileOutputStream("d:/Chunk.mod.class"); fos.write(cw.toByteArray()); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ return cw.toByteArray(); }
From source file:blockphysics.asm.BPTransformer.java
License:Open Source License
private byte[] transformEntityMinecart(byte[] bytes) { /*try//from w w w.j av a 2 s. c om { FileOutputStream fos = new FileOutputStream("d:/EntityMinecart.orig.class"); fos.write(bytes); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ System.out.print("[BlockPhysics] Patching EntityMinecart.class .........."); ClassNode classNode = new ClassNode(); ClassReader classReader = new ClassReader(bytes); classReader.accept(classNode, 0); ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); classNode.accept(cw); MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "al", "()V", null, null); mv.visitCode(); mv.visitInsn(RETURN); mv.visitMaxs(0, 1); mv.visitEnd(); cw.visitEnd(); System.out.println("OK"); /*try { FileOutputStream fos = new FileOutputStream("d:/EntityMinecart.class"); fos.write(cw.toByteArray()); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ return cw.toByteArray(); }
From source file:blockphysics.asm.BPTransformer.java
License:Open Source License
private byte[] transformEntityXPOrb(byte[] bytes) { /*try/*from ww w.java 2 s. co m*/ { FileOutputStream fos = new FileOutputStream("d:/EntityXPOrb.orig.class"); fos.write(bytes); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ System.out.print("[BlockPhysics] Patching EntityXPOrb.class ............."); ClassNode classNode = new ClassNode(); ClassReader classReader = new ClassReader(bytes); classReader.accept(classNode, 0); ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS); classNode.accept(cw); MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "al", "()V", null, null); mv.visitCode(); mv.visitInsn(RETURN); mv.visitMaxs(0, 1); mv.visitEnd(); cw.visitEnd(); System.out.println("OK"); /*try { FileOutputStream fos = new FileOutputStream("d:/EntityXPOrb.class"); fos.write(cw.toByteArray()); fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ return cw.toByteArray(); }