List of usage examples for org.objectweb.asm ClassVisitor ClassVisitor
public ClassVisitor(final int api)
From source file:org.jacoco.core.internal.instr.ClassInstrumenterTest.java
License:Open Source License
@Test public void testNoMethodVisitor() { instrumenter = new ClassInstrumenter(123, runtime, new ClassVisitor(Opcodes.ASM4) { @Override/* w ww . ja va2s . c o m*/ public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { return null; } }); assertNull(instrumenter.visitMethod(0, "foo", "()V", null, null)); }
From source file:org.jacoco.core.test.validation.ClassFileVersionsTest.java
License:Open Source License
private void assertFrames(byte[] source, boolean expected) { final boolean[] hasFrames = new boolean[] { false }; new ClassReader(source).accept(new ClassVisitor(Opcodes.ASM4) { @Override/*from ww w.j av a 2s . com*/ public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { return new MethodVisitor(Opcodes.ASM4) { @Override public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) { hasFrames[0] = true; } }; } }, 0); assertEquals(Boolean.valueOf(expected), Boolean.valueOf(hasFrames[0])); }
From source file:org.jboss.as.hibernate.Hibernate51CompatibilityTransformer.java
License:Open Source License
private void collectClassesAndInterfaces(Set<String> classesAndInterfaces, ClassLoader classLoader, String className) {/*from w w w. jav a 2 s .c om*/ if (className == null || "java/lang/Object".equals(className)) { return; } try (InputStream is = classLoader.getResourceAsStream(className.replace('.', '/') + ".class")) { ClassReader classReader = new ClassReader(is); classReader.accept(new ClassVisitor(useASMExperimental ? Opcodes.ASM7_EXPERIMENTAL : Opcodes.ASM6) { @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { if (interfaces != null) { for (String interfaceName : interfaces) { classesAndInterfaces.add(interfaceName); collectClassesAndInterfaces(classesAndInterfaces, classLoader, interfaceName); } } classesAndInterfaces.add(superName); collectClassesAndInterfaces(classesAndInterfaces, classLoader, superName); } @Override public void visitInnerClass(String name, String outerName, String innerName, int access) { if (innerName != null) { classesAndInterfaces.add(innerName); } } }, 0); } catch (IOException e) { logger.warn("Unable to open class file %1$s", className, e); } }
From source file:org.jboss.errai.GwtLinkerClassHider.java
License:Apache License
/** * Generates a class with a no-args public constructor. * //from www. jav a 2 s .c o m * @param loader * ignored. * @param className * The generated class has this package and name. * @param classBeingRedefined * ignored. * @param protectionDomain * ignored. * @param classfileBuffer * ignored. * @return bytecode for an empty class whose package and class name are * determined by the {@code className} parameter. */ public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { if (className.contains("Linker")) { final List<String> annotations = new ArrayList<String>(); ClassReader cr = new ClassReader(classfileBuffer); ClassVisitor cv = new ClassVisitor(Opcodes.ASM4) { @Override public AnnotationVisitor visitAnnotation(String name, boolean val) { annotations.add(name); return super.visitAnnotation(name, val); } }; cr.accept(cv, 0); if (annotations.contains("Lcom/google/gwt/core/ext/linker/Shardable;") || annotations.contains("Lcom/google/gwt/core/ext/linker/LinkerOrder;")) { if (debug) { System.out.println("client-local-class-hider (linkers): hiding GWT linker class: " + className); } return EmtpyClassGenerator.generateEmptyClass(className); } } if (debug) { System.out.println("client-local-class-hider (linkers): NOT hiding class (not a linker): " + className); } return null; }
From source file:org.jooby.internal.RouteMetadata.java
License:Apache License
private static ClassVisitor visitor(final Map<String, Object> md) { return new ClassVisitor(Opcodes.ASM5) { @Override/* w w w. ja va 2 s. c o m*/ public MethodVisitor visitMethod(final int access, final String name, final String desc, final String signature, final String[] exceptions) { boolean isPublic = ((access & Opcodes.ACC_PUBLIC) > 0) ? true : false; boolean isStatic = ((access & Opcodes.ACC_STATIC) > 0) ? true : false; if (!isPublic || isStatic) { // ignore return null; } final String seed = name + desc; Type[] args = Type.getArgumentTypes(desc); String[] names = args.length == 0 ? NO_ARG : new String[args.length]; md.put(paramsKey(seed), names); int minIdx = ((access & Opcodes.ACC_STATIC) > 0) ? 0 : 1; int maxIdx = Arrays.stream(args).mapToInt(Type::getSize).sum(); return new MethodVisitor(Opcodes.ASM5) { private int i = 0; private boolean skipLocalTable = false; @Override public void visitParameter(final String name, final int access) { skipLocalTable = true; // save current parameter names[i] = name; // move to next i += 1; } @Override public void visitLineNumber(final int line, final Label start) { // save line number md.putIfAbsent(startAtKey(seed), line); } @Override public void visitLocalVariable(final String name, final String desc, final String signature, final Label start, final Label end, final int index) { if (!skipLocalTable) { if (index >= minIdx && index <= maxIdx) { // save current parameter names[i] = name; // move to next i += 1; } } } }; } }; }
From source file:org.kohsuke.accmod.impl.Checker.java
License:Open Source License
/** * Loads an additional restriction from the specified "META-INF/annotations/org.kohsuke.accmod.Restricted" file. * * @param isInTheInspectedModule//w w w . j a v a 2 s .c o m * This value shows up in {@link RestrictedElement#isInTheInspectedModule()}. * @param stream */ public void loadRestrictions(InputStream stream, final boolean isInTheInspectedModule) throws IOException { if (stream == null) return; BufferedReader r = new BufferedReader(new InputStreamReader(stream, "UTF-8")); String className; while ((className = r.readLine()) != null) { InputStream is = dependencies.getResourceAsStream(className.replace('.', '/') + ".class"); if (is == null) { errorListener.onWarning(null, null, "Failed to find class file for " + className); continue; } try { new ClassReader(is).accept(new ClassVisitor(Opcodes.ASM5) { private String className; @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { this.className = name; } @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { return onAnnotationFor(className, desc); } @Override public FieldVisitor visitField(int access, final String name, String desc, String signature, Object value) { return new FieldVisitor(Opcodes.ASM5) { @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { return onAnnotationFor(className + '.' + name, desc); } }; } @Override public MethodVisitor visitMethod(int access, final String methodName, final String methodDesc, String signature, String[] exceptions) { return new MethodVisitor(Opcodes.ASM5) { @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { return onAnnotationFor(className + '.' + methodName + methodDesc, desc); } }; } /** * Parse {@link Restricted} annotation on some annotated element. */ private AnnotationVisitor onAnnotationFor(final String keyName, String desc) { if (RESTRICTED_DESCRIPTOR.equals(desc)) { RestrictedElement target = new RestrictedElement() { public boolean isInTheInspectedModule() { return isInTheInspectedModule; } public String toString() { return keyName; } }; return new Parser(target) { @Override public void visitEnd() { try { restrictions.put(keyName, build(factory)); } catch (ClassNotFoundException e) { failure(e); } catch (InstantiationException e) { failure(e); } catch (IllegalAccessException e) { failure(e); } } /** * Fails to load a {@link AccessRestriction} instance. */ private void failure(Exception e) { errorListener.onError(e, null, "Failed to load restrictions"); } }; } return null; } }, ClassReader.SKIP_CODE); } finally { is.close(); } } }
From source file:org.kohsuke.accmod.impl.Checker.java
License:Open Source License
/** * Inspects a class for the restriction violations. *//* ww w . jav a 2s .co m*/ public void checkClass(File clazz) throws IOException { FileInputStream in = new FileInputStream(clazz); try { ClassReader cr = new ClassReader(in); cr.accept(new ClassVisitor(Opcodes.ASM5) { private String className; private String methodName, methodDesc; private int line; @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { this.className = name; if (superName != null) getRestrictions(superName).usedAsSuperType(currentLocation, errorListener); if (interfaces != null) { for (String intf : interfaces) getRestrictions(intf).usedAsInterface(currentLocation, errorListener); } } @Override public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { this.methodName = name; this.methodDesc = desc; return new MethodVisitor(Opcodes.ASM5) { @Override public void visitLineNumber(int _line, Label start) { line = _line; } public void visitTypeInsn(int opcode, String type) { switch (opcode) { case Opcodes.NEW: getRestrictions(type).instantiated(currentLocation, errorListener); } } @Override public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { getRestrictions(owner + '.' + name + desc).invoked(currentLocation, errorListener); } @Override public void visitFieldInsn(int opcode, String owner, String name, String desc) { Restrictions r = getRestrictions(owner + '.' + name); switch (opcode) { case Opcodes.GETSTATIC: case Opcodes.GETFIELD: r.read(currentLocation, errorListener); break; case Opcodes.PUTSTATIC: case Opcodes.PUTFIELD: r.written(currentLocation, errorListener); break; } super.visitFieldInsn(opcode, owner, name, desc); } }; } /** * Constant that represents the current location. */ private final Location currentLocation = new Location() { public String getClassName() { return className.replace('/', '.'); } public String getMethodName() { return methodName; } public String getMethodDescriptor() { return methodDesc; } public int getLineNumber() { return line; } public String toString() { return className + ':' + line; } public ClassLoader getDependencyClassLoader() { return dependencies; } public boolean isInTheSameModuleAs(RestrictedElement e) { // TODO throw new UnsupportedOperationException(); } }; }, SKIP_FRAMES); } finally { in.close(); } }
From source file:org.kohsuke.accmod.restrictions.ProtectedExternally.java
License:Open Source License
@Override public void invoked(Location loc, RestrictedElement target, ErrorListener errorListener) { if (target.isInTheInspectedModule()) { return;//from w w w . j a v a 2 s . com } try (InputStream is = loc.getDependencyClassLoader() .getResourceAsStream(loc.getClassName().replace('.', '/') + ".class")) { if (is == null) { errorListener.onError(null, loc, "could not find class"); return; } ClassReader cr = new ClassReader(is); final AtomicBoolean ok = new AtomicBoolean(); final String supe = target.toString().replaceFirst("[.].+$", ""); cr.accept(new ClassVisitor(Opcodes.ASM5) { @Override public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) { // TODO traverse supertype hierarchy recursively if (supe.equals(superName) || interfaces != null && Arrays.asList(interfaces).contains(supe)) { ok.set(true); } } }, ClassReader.SKIP_FRAMES); if (ok.get()) { return; } } catch (IOException x) { errorListener.onError(x, loc, "cannot inspect caller"); return; } errorListener.onError(null, loc, target + " must not be called except as if protected"); }
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. jav a 2 s. 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(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); } }
From source file:org.moditect.internal.analyzer.ServiceLoaderUseScanner.java
License:Apache License
private Set<String> getUsedServices(JarFile jarFile, JarEntry je) { Set<String> usedServices = new HashSet<>(); try (InputStream classFile = jarFile.getInputStream(je)) { new ClassReader(classFile).accept(new ClassVisitor(Opcodes.ASM6) { @Override/*from w w w. j ava 2 s. c o m*/ public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) { return new MethodVisitor(Opcodes.ASM6) { private Type lastType; @Override public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) { if (owner.equals("java/util/ServiceLoader") && name.equals("load")) { if (lastType == null) { // TODO Log class/method log.warn( "Cannot derive uses clause from service loader invocation with non constant class literal"); } else { usedServices.add(lastType.getClassName()); } } } @Override public void visitLdcInsn(Object cst) { if (cst instanceof Type) { lastType = (Type) cst; } }; }; } }, 0); } catch (IOException e) { throw new RuntimeException(e); } return usedServices; }