List of usage examples for org.objectweb.asm MethodVisitor visitLineNumber
public void visitLineNumber(final int line, final Label start)
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 {// w w w . j av a2s . c o m 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:com.facebook.presto.bytecode.debug.LineNumberNode.java
License:Apache License
@Override public void accept(MethodVisitor visitor, MethodGenerationContext generationContext) { if (generationContext.updateLineNumber(lineNumber)) { label.accept(visitor, generationContext); visitor.visitLineNumber(lineNumber, label.getLabel()); }//from w w w . j a v a 2 s . co m }
From source file:com.google.code.jconts.instrument.gen.StateClassGenerator.java
License:Apache License
public void accept(TransformationContext context) { ClassVisitor cv = context.writer();//from w ww.j a va 2 s .co m final String name = info.stateClassName; cv.visit(Opcodes.V1_6, Opcodes.ACC_FINAL /*| Opcodes.ACC_SYNTHETIC*/, name, null, OBJECT_NAME, null); cv.visitSource(info.ownerSource, null); cv.visitOuterClass(info.owner, null, null); cv.visitField(0/*Opcodes.ACC_SYNTHETIC*/, CONTINUATION_FIELD, CONTINUATION_DESC, 'L' + CONTINUATION_NAME + '<' + info.valueSignature + ">;", null); // Local variables state List<String> names = info.tracker.getFieldNames(); List<Type> types = info.tracker.getFieldTypes(); for (int i = 0; i < names.size(); ++i) { cv.visitField(0/*Opcodes.ACC_SYNTHETIC*/, names.get(i), types.get(i).getDescriptor(), null, null); } // Return value variable cv.visitField(0/*Opcodes.ACC_SYNTHETIC*/, "result", OBJECT_DESC, null, null); cv.visitField(0/*Opcodes.ACC_SYNTHETIC*/, "exception", THROWABLE_DESC, null, null); // Generate constructor MethodVisitor mv = cv.visitMethod(0, CTOR_NAME, DEFAULT_CTOR_DESC, null, null); mv.visitCode(); Label start = new Label(); Label end = new Label(); mv.visitLabel(start); mv.visitLineNumber(0, start); mv.visitVarInsn(Opcodes.ALOAD, 0); mv.visitMethodInsn(Opcodes.INVOKESPECIAL, OBJECT_NAME, CTOR_NAME, DEFAULT_CTOR_DESC); mv.visitInsn(Opcodes.RETURN); mv.visitLabel(end); mv.visitLocalVariable("this", 'L' + name + ';', null, start, end, 0); mv.visitMaxs(1, 1); mv.visitEnd(); cv.visitEnd(); }
From source file:com.google.devtools.build.wireless.testing.java.injector.coverage.CodeCoverageClassAdapterTest.java
License:Apache License
/** * Tests //ww w. j a v a 2 s . c o m * {@link CoverageStatisticContainer#addInstrumentedLineAndGetLineIndex(String, int)} * . * * <p>Simulates the adding of a full method starting from line 0 until a * value. */ public void testIncludeLines_sequence() { String className = "com/Foo"; String sourceName = "Foo.java"; String producedFilename = "com/Foo"; String methodName = "method"; String methodDesc = "()V"; int lines = 12345; String[] inclusion = new String[] { "+com" }; classAdapter = new CodeCoverageClassAdapter(new EmptyVisitor(), statisticContainer, inclusion, CoverageMode.LINE); classAdapter.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, className, null, ClassNames.JAVA_LANG_OBJECT, null); classAdapter.visitSource(sourceName, null); MethodVisitor mv = classAdapter.visitMethod(Opcodes.ACC_PUBLIC, methodName, methodDesc, null, null); mv.visitCode(); for (int i = 0; i < lines; i++) { mv.visitLineNumber(i, null); } mv.visitEnd(); assertEquals("Wrong line size.", lines, statisticContainer.getNumberOfLinesForFile(producedFilename)); }
From source file:com.google.devtools.build.wireless.testing.java.injector.coverage.CodeCoverageClassAdapterTest.java
License:Apache License
public void testVisitMethod_lineCoverageInstrumentationAdded() { final String methodName = "method"; final String className = "com/google/common/Timer"; final String sourceFile = "Timer.java"; final String methodDesc = "()V"; final String method = className + "." + methodName + methodDesc; String[] inclusion = new String[] { "+com" }; classAdapter = new CodeCoverageClassAdapter(new EmptyVisitor(), statisticContainer, inclusion, CoverageMode.LINE);//from ww w .j a va2s .c om classAdapter.visit(1, Opcodes.ACC_PUBLIC, className, null, ClassNames.JAVA_LANG_OBJECT, null); classAdapter.visitSource(sourceFile, null); MethodVisitor mv = classAdapter.visitMethod(Opcodes.ACC_PUBLIC, methodName, "()V", null, null); final int lineNumber = 20; mv.visitLineNumber(20, new Label()); assertEquals(1, statisticContainer.getInstrumentedLines(className).size()); assertTrue(statisticContainer.getInstrumentedLines(className).get(0).equals(lineNumber)); }
From source file:com.google.devtools.build.wireless.testing.java.injector.coverage.CodeCoverageClassAdapterTest.java
License:Apache License
public void testVisitMethod_lineCoverageInstrumentationNotAdded() { final String methodName = "method"; final String className = "com/google/common/Timer"; final String sourceFile = "Timer.java"; final String methodDesc = "()V"; final String method = className + "." + methodName + methodDesc; String[] inclusion = new String[] { "+com" }; classAdapter = new CodeCoverageClassAdapter(new EmptyVisitor(), statisticContainer, inclusion, CoverageMode.SUMMARY);/* w w w.j a v a2 s .c o m*/ classAdapter.visit(1, Opcodes.ACC_PUBLIC, className, null, ClassNames.JAVA_LANG_OBJECT, null); classAdapter.visitSource(sourceFile, null); MethodVisitor mv = classAdapter.visitMethod(Opcodes.ACC_PUBLIC, methodName, "()V", null, null); final int lineNumber = 20; mv.visitLineNumber(20, new Label()); assertEquals(0, statisticContainer.getInstrumentedLines(method).size()); }
From source file:com.googlecode.d2j.converter.IR2JConverter.java
License:Apache License
private void reBuildInstructions(IrMethod ir, MethodVisitor asm) { asm = new LdcOptimizeAdapter(asm); int maxLocalIndex = 0; for (Local local : ir.locals) { maxLocalIndex = Math.max(maxLocalIndex, local._ls_index); }/*from ww w .j a v a 2s. c om*/ Map<String, Integer> lockMap = new HashMap<String, Integer>(); for (Stmt st : ir.stmts) { switch (st.st) { case LABEL: LabelStmt labelStmt = (LabelStmt) st; Label label = (Label) labelStmt.tag; asm.visitLabel(label); if (labelStmt.lineNumber >= 0) { asm.visitLineNumber(labelStmt.lineNumber, label); } break; case ASSIGN: { E2Stmt e2 = (E2Stmt) st; Value v1 = e2.op1; Value v2 = e2.op2; switch (v1.vt) { case LOCAL: Local local = ((Local) v1); int i = local._ls_index; if (v2.vt == VT.LOCAL && (i == ((Local) v2)._ls_index)) {// continue; } boolean skipOrg = false; if (v1.valueType.charAt(0) == 'I') {// check for IINC if (v2.vt == VT.ADD) { E2Expr e = (E2Expr) v2; if ((e.op1 == local && e.op2.vt == VT.CONSTANT) || (e.op2 == local && e.op1.vt == VT.CONSTANT)) { int increment = (Integer) ((Constant) (e.op1 == local ? e.op2 : e.op1)).value; if (increment >= Short.MIN_VALUE && increment <= Short.MAX_VALUE) { asm.visitIincInsn(i, increment); skipOrg = true; } } } else if (v2.vt == VT.SUB) { E2Expr e = (E2Expr) v2; if (e.op1 == local && e.op2.vt == VT.CONSTANT) { int increment = -(Integer) ((Constant) e.op2).value; if (increment >= Short.MIN_VALUE && increment <= Short.MAX_VALUE) { asm.visitIincInsn(i, increment); skipOrg = true; } } } } if (!skipOrg) { accept(v2, asm); if (i >= 0) { asm.visitVarInsn(getOpcode(v1, ISTORE), i); } else if (!v1.valueType.equals("V")) { // skip void type locals switch (v1.valueType.charAt(0)) { case 'J': case 'D': asm.visitInsn(POP2); break; default: asm.visitInsn(POP); break; } } } break; case STATIC_FIELD: { StaticFieldExpr fe = (StaticFieldExpr) v1; accept(v2, asm); insertI2x(v2.valueType, fe.type, asm); asm.visitFieldInsn(PUTSTATIC, toInternal(fe.owner), fe.name, fe.type); break; } case FIELD: { FieldExpr fe = (FieldExpr) v1; accept(fe.op, asm); accept(v2, asm); insertI2x(v2.valueType, fe.type, asm); asm.visitFieldInsn(PUTFIELD, toInternal(fe.owner), fe.name, fe.type); break; } case ARRAY: ArrayExpr ae = (ArrayExpr) v1; accept(ae.op1, asm); accept(ae.op2, asm); accept(v2, asm); String tp1 = ae.op1.valueType; String tp2 = ae.valueType; if (tp1.charAt(0) == '[') { String arrayElementType = tp1.substring(1); insertI2x(v2.valueType, arrayElementType, asm); asm.visitInsn(getOpcode(arrayElementType, IASTORE)); } else { asm.visitInsn(getOpcode(tp2, IASTORE)); } break; } } break; case IDENTITY: { E2Stmt e2 = (E2Stmt) st; if (e2.op2.vt == VT.EXCEPTION_REF) { int index = ((Local) e2.op1)._ls_index; if (index >= 0) { asm.visitVarInsn(ASTORE, index); } else { asm.visitInsn(POP); } } } break; case FILL_ARRAY_DATA: { E2Stmt e2 = (E2Stmt) st; Object arrayData = ((Constant) e2.getOp2()).value; int arraySize = Array.getLength(arrayData); String arrayValueType = e2.getOp1().valueType; String elementType; if (arrayValueType.charAt(0) == '[') { elementType = arrayValueType.substring(1); } else { elementType = "I"; } int iastoreOP = getOpcode(elementType, IASTORE); accept(e2.getOp1(), asm); for (int i = 0; i < arraySize; i++) { asm.visitInsn(DUP); asm.visitLdcInsn(i); asm.visitLdcInsn(Array.get(arrayData, i)); asm.visitInsn(iastoreOP); } asm.visitInsn(POP); } break; case GOTO: asm.visitJumpInsn(GOTO, (Label) ((GotoStmt) st).target.tag); break; case IF: reBuildJumpInstructions((IfStmt) st, asm); break; case LOCK: { Value v = ((UnopStmt) st).op; accept(v, asm); if (optimizeSynchronized) { switch (v.vt) { case LOCAL: // FIXME do we have to disable local due to OptSyncTest ? // break; case CONSTANT: { String key; if (v.vt == VT.LOCAL) { key = "L" + ((Local) v)._ls_index; } else { key = "C" + ((Constant) v).value; } Integer integer = lockMap.get(key); int nIndex = integer != null ? integer : ++maxLocalIndex; asm.visitInsn(DUP); asm.visitVarInsn(getOpcode(v, ISTORE), nIndex); lockMap.put(key, nIndex); } break; default: throw new RuntimeException(); } } asm.visitInsn(MONITORENTER); } break; case UNLOCK: { Value v = ((UnopStmt) st).op; if (optimizeSynchronized) { switch (v.vt) { case LOCAL: case CONSTANT: { String key; if (v.vt == VT.LOCAL) { key = "L" + ((Local) v)._ls_index; } else { key = "C" + ((Constant) v).value; } Integer integer = lockMap.get(key); if (integer != null) { asm.visitVarInsn(getOpcode(v, ILOAD), integer); } else { accept(v, asm); } } break; // TODO other default: { accept(v, asm); break; } } } else { accept(v, asm); } asm.visitInsn(MONITOREXIT); } break; case NOP: break; case RETURN: { Value v = ((UnopStmt) st).op; accept(v, asm); insertI2x(v.valueType, ir.ret, asm); asm.visitInsn(getOpcode(v, IRETURN)); } break; case RETURN_VOID: asm.visitInsn(RETURN); break; case LOOKUP_SWITCH: { LookupSwitchStmt lss = (LookupSwitchStmt) st; accept(lss.op, asm); Label targets[] = new Label[lss.targets.length]; for (int i = 0; i < targets.length; i++) { targets[i] = (Label) lss.targets[i].tag; } asm.visitLookupSwitchInsn((Label) lss.defaultTarget.tag, lss.lookupValues, targets); } break; case TABLE_SWITCH: { TableSwitchStmt tss = (TableSwitchStmt) st; accept(tss.op, asm); Label targets[] = new Label[tss.targets.length]; for (int i = 0; i < targets.length; i++) { targets[i] = (Label) tss.targets[i].tag; } asm.visitTableSwitchInsn(tss.lowIndex, tss.lowIndex + targets.length - 1, (Label) tss.defaultTarget.tag, targets); } break; case THROW: accept(((UnopStmt) st).op, asm); asm.visitInsn(ATHROW); break; case VOID_INVOKE: InvokeExpr invokeExpr = (InvokeExpr) st.getOp(); accept(invokeExpr, asm); String ret = invokeExpr.ret; if (invokeExpr.vt == VT.INVOKE_NEW) { asm.visitInsn(POP); } else if (!"V".equals(ret)) { switch (ret.charAt(0)) { case 'J': case 'D': asm.visitInsn(POP2); break; default: asm.visitInsn(POP); break; } } break; default: throw new RuntimeException("not support st: " + st.st); } } }
From source file:com.googlecode.ddom.weaver.asm.MethodVisitorTee.java
License:Apache License
public void visitLineNumber(int line, Label start) { for (MethodVisitor visitor : visitors) { visitor.visitLineNumber(line, start); }// w ww . ja v a2s.c om }
From source file:com.khubla.jvmbasic.jvmbasicc.JVMBasicCompiler.java
License:Open Source License
/** * generate init./*from www .j a v a 2 s.co m*/ * <p> * This inits the class members and assigns class members, such as the ExecutionContext. * </p> * <p> * <code> * public ExecutionContext executionContext = new ExecutionContext(); * </code> * </p> */ protected void generateInit(String className, ClassWriter classWriter) throws Exception { try { final MethodVisitor methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null); methodVisitor.visitCode(); /* * call init() */ final Label l0 = new Label(); methodVisitor.visitLabel(l0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V"); /* * create a new execution context and assign it */ final Label l1 = new Label(); methodVisitor.visitLabel(l1); methodVisitor.visitVarInsn(Opcodes.ALOAD, 0); methodVisitor.visitTypeInsn(Opcodes.NEW, RTLHelper.JASIC_RUNTIME_EXECUTIONCONTEXT); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, RTLHelper.JASIC_RUNTIME_EXECUTIONCONTEXT, "<init>", "()V"); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, className, RTLHelper.EXECUTIONCONTEXT_NAME, RTLHelper.JASIC_RUNTIME_EXECUTIONCONTEXT_TYPE); /* * return */ final Label l2 = new Label(); methodVisitor.visitLabel(l2); methodVisitor.visitLineNumber(8, l2); methodVisitor.visitInsn(Opcodes.RETURN); /* * declare variables */ final Label l3 = new Label(); methodVisitor.visitLabel(l3); methodVisitor.visitLocalVariable("this", "L" + className + ";", null, l0, l3, 0); methodVisitor.visitMaxs(3, 1); methodVisitor.visitEnd(); } catch (final Exception e) { throw new Exception("Exception in generateInit", e); } }
From source file:com.khubla.jvmbasic.jvmbasicc.JVMBasicCompiler.java
License:Open Source License
/** * generate void main(String[])//from ww w. j a v a 2 s. c o m * <p> * <code> * public static void main(String[] args) { * ExampleProgram exampleProgram = new ExampleProgram(); * try { * exampleProgram.inputStream = System.in; * exampleProgram.outputStream = System.out; * exampleProgram.program(); * } catch (Exception e) { * e.printStackTrace(); * } * } * </code> * </p> */ protected void generateMain(String classname, ClassWriter classWriter) throws Exception { try { /* * make method */ final MethodVisitor methodVisitor = classWriter.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); methodVisitor.visitCode(); final Label l0 = new Label(); final Label l1 = new Label(); final Label l2 = new Label(); methodVisitor.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception"); final Label l3 = new Label(); methodVisitor.visitLabel(l3); /* * declare a local instance of the class in the void() main, store as variable 1. */ methodVisitor.visitTypeInsn(Opcodes.NEW, classname); methodVisitor.visitInsn(Opcodes.DUP); methodVisitor.visitMethodInsn(Opcodes.INVOKESPECIAL, classname, "<init>", "()V"); methodVisitor.visitVarInsn(Opcodes.ASTORE, 1); /* * assign the input stream */ methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "in", "Ljava/io/InputStream;"); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, classname, "inputStream", "Ljava/io/InputStream;"); /* * assign the output stream */ methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, classname, "outputStream", "Ljava/io/PrintStream;"); /* * load the class instance from variable 1 and call "program" */ methodVisitor.visitLabel(l0); methodVisitor.visitVarInsn(Opcodes.ALOAD, 1); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, classname, "program", "()V"); methodVisitor.visitLabel(l1); final Label l4 = new Label(); methodVisitor.visitJumpInsn(Opcodes.GOTO, l4); methodVisitor.visitLabel(l2); methodVisitor.visitFrame(Opcodes.F_FULL, 2, new Object[] { "[Ljava/lang/String;", classname }, 1, new Object[] { "java/lang/Exception" }); methodVisitor.visitVarInsn(Opcodes.ASTORE, 2); final Label l5 = new Label(); methodVisitor.visitLabel(l5); methodVisitor.visitLineNumber(21, l5); methodVisitor.visitVarInsn(Opcodes.ALOAD, 2); methodVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Exception", "printStackTrace", "()V"); /* * return */ methodVisitor.visitLabel(l4); methodVisitor.visitFrame(Opcodes.F_SAME, 0, null, 0, null); methodVisitor.visitInsn(Opcodes.RETURN); /* * declare the parameters */ final Label l6 = new Label(); methodVisitor.visitLabel(l6); methodVisitor.visitLocalVariable("args", "[Ljava/lang/String;", null, l3, l6, 0); methodVisitor.visitLocalVariable("exampleProgram", "L" + classname + ";", null, l0, l6, 1); methodVisitor.visitLocalVariable("e", "Ljava/lang/Exception;", null, l5, l4, 2); /* * done */ methodVisitor.visitMaxs(2, 3); methodVisitor.visitEnd(); } catch (final Exception e) { throw new Exception("Exception in generateMain", e); } }