Java Code Examples for org.objectweb.asm.ClassWriter#visitMethod()
The following examples show how to use
org.objectweb.asm.ClassWriter#visitMethod() .
You can vote up the ones you like or vote down the ones you don't like,
and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
| Source File: WriteStyleablesProcessor.java From shrinker with Apache License 2.0 | 6 votes |
|
private void writeClinit(ClassWriter writer) {
Map<String, int[]> styleables = symbols.getStyleables();
MethodVisitor clinit = writer.visitMethod(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
clinit.visitCode();
for (Map.Entry<String, int[]> entry : styleables.entrySet()) {
final String field = entry.getKey();
final int[] value = entry.getValue();
final int length = value.length;
pushInt(clinit, length);
clinit.visitIntInsn(Opcodes.NEWARRAY, Opcodes.T_INT);
for (int i = 0; i < length; i++) {
clinit.visitInsn(Opcodes.DUP); // dup
pushInt(clinit, i);
pushInt(clinit, value[i]);
clinit.visitInsn(Opcodes.IASTORE); // iastore
}
clinit.visitFieldInsn(Opcodes.PUTSTATIC, RSymbols.R_STYLEABLES_CLASS_NAME, field, "[I");
}
clinit.visitInsn(Opcodes.RETURN);
clinit.visitMaxs(0, 0); // auto compute
clinit.visitEnd();
}
Example 2
| Source File: AdviceGenerator.java From glowroot with Apache License 2.0 | 6 votes |
|
private void addOnThrowMethod(ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onThrow",
"(Ljava/lang/Throwable;Lorg/glowroot/agent/plugin/api/TraceEntry;)V", null, null);
visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnThrow;");
checkNotNull(mv.visitParameterAnnotation(0,
"Lorg/glowroot/agent/plugin/api/weaving/BindThrowable;", true)).visitEnd();
checkNotNull(mv.visitParameterAnnotation(1,
"Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true)).visitEnd();
mv.visitCode();
if (!config.traceEntryEnabledProperty().isEmpty()) {
mv.visitVarInsn(ALOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFNONNULL, l0);
mv.visitInsn(RETURN);
mv.visitLabel(l0);
}
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry",
"endWithError", "(Ljava/lang/Throwable;)V", true);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
Example 3
| Source File: MarkerClassGenerator.java From OpenModsLib with MIT License | 6 votes |
|
private <T> Class<? extends T> createMarkerCls(Class<T> superClass, int key) {
final ClassWriter writer = new ClassWriter(0);
final String superCls = Type.getInternalName(superClass);
writer.visit(Opcodes.V1_6, Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, superCls + "$marker_" + key, null, superCls, interfaces);
final MethodVisitor mv = writer.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, "getMarkerValue", "()I", null, null);
mv.visitCode();
mv.visitLdcInsn(key);
mv.visitInsn(Opcodes.IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
writer.visitEnd();
@SuppressWarnings("unchecked")
final Class<? extends T> cls = (Class<? extends T>)loader.define(writer.toByteArray());
return cls;
}
Example 4
| Source File: PeripheralCodeGenerator.java From OpenPeripheral with MIT License | 6 votes |
|
protected void visitConnectivityMethod(String methodName, String clsName, ClassWriter writer, Type targetType, final boolean isAttachable, final boolean isOcAttachable) {
MethodVisitor onConnect = writer.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, methodName, CONNECTIVITY_METHOD_TYPE.getDescriptor(), null, null);
onConnect.visitCode();
if (isAttachable) {
onConnect.visitVarInsn(Opcodes.ALOAD, 0);
onConnect.visitInsn(Opcodes.DUP);
onConnect.visitFieldInsn(Opcodes.GETFIELD, clsName, CommonMethodsBuilder.TARGET_FIELD_NAME, targetType.getDescriptor());
onConnect.visitVarInsn(Opcodes.ALOAD, 1);
onConnect.visitMethodInsn(Opcodes.INVOKEVIRTUAL, clsName, methodName, ATTACHABLE_WRAP_TYPE.getDescriptor(), false);
}
if (isOcAttachable) {
onConnect.visitVarInsn(Opcodes.ALOAD, 0);
onConnect.visitFieldInsn(Opcodes.GETFIELD, clsName, CommonMethodsBuilder.TARGET_FIELD_NAME, targetType.getDescriptor());
onConnect.visitVarInsn(Opcodes.ALOAD, 1);
onConnect.visitMethodInsn(Opcodes.INVOKESTATIC, clsName, methodName, OC_ATTACHABLE_WRAP_TYPE.getDescriptor(), false);
}
onConnect.visitInsn(Opcodes.RETURN);
onConnect.visitMaxs(0, 0);
onConnect.visitEnd();
}
Example 5
| Source File: InterfaceFieldClassGeneratorTest.java From AVM with MIT License | 5 votes |
|
public static byte[] getNestedInterfaceCalledFIELDSLevelTwo() {
ClassWriter classWriter = new ClassWriter(0);
FieldVisitor fieldVisitor;
MethodVisitor methodVisitor;
classWriter.visit(V10, ACC_PUBLIC | ACC_ABSTRACT | ACC_INTERFACE, "NestedInterfaces$FIELDS$FIELDS", null, "java/lang/Object", null);
classWriter.visitSource("NestedInterfaces.java", null);
classWriter.visitInnerClass("NestedInterfaces$FIELDS", "NestedInterfaces", "FIELDS", ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);
classWriter.visitInnerClass("NestedInterfaces$FIELDS$FIELDS", "NestedInterfaces$FIELDS", "FIELDS", ACC_PUBLIC | ACC_STATIC | ACC_ABSTRACT | ACC_INTERFACE);
{
fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC, "b", "I", null, null);
fieldVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
methodVisitor.visitCode();
Label label0 = new Label();
methodVisitor.visitLabel(label0);
methodVisitor.visitLineNumber(7, label0);
methodVisitor.visitTypeInsn(NEW, "java/lang/Object");
methodVisitor.visitInsn(DUP);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
methodVisitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "hashCode", "()I", false);
methodVisitor.visitFieldInsn(PUTSTATIC, "NestedInterfaces$FIELDS$FIELDS", "b", "I");
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(2, 0);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
Example 6
| Source File: GenerateHackedConstructorBytecode.java From glowroot with Apache License 2.0 | 5 votes |
|
static LazyDefinedClass generateHackedConstructorBytecode() throws Exception {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
MethodVisitor mv;
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "HackedConstructorBytecode", null,
Test.class.getName().replace('.', '/'), new String[] {});
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitInsn(ICONST_1);
mv.visitIntInsn(NEWARRAY, T_BOOLEAN);
mv.visitVarInsn(ASTORE, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, Test.class.getName().replace('.', '/'), "<init>",
"()V", false);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(ICONST_0);
mv.visitInsn(ICONST_1);
mv.visitInsn(BASTORE);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
cw.visitEnd();
return ImmutableLazyDefinedClass.builder()
.type(Type.getObjectType("HackedConstructorBytecode"))
.bytes(cw.toByteArray())
.build();
}
Example 7
| Source File: DgmConverter.java From groovy with Apache License 2.0 | 5 votes |
|
private static void createIsValidMethodMethod(CachedMethod method, ClassWriter cw, String className) {
MethodVisitor mv;
if (method.getParamsCount() == 2 && method.getParameterTypes()[0].isNumber && method.getParameterTypes()[1].isNumber) {
// 1 param meta method
mv = cw.visitMethod(ACC_PUBLIC, "isValidMethod", "([Ljava/lang/Class;)Z", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFNULL, l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEVIRTUAL, className, "getParameterTypes", "()[Lorg/codehaus/groovy/reflection/CachedClass;", false);
mv.visitInsn(ICONST_0);
mv.visitInsn(AALOAD);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(ICONST_0);
mv.visitInsn(AALOAD);
mv.visitMethodInsn(INVOKEVIRTUAL, "org/codehaus/groovy/reflection/CachedClass", "isAssignableFrom", "(Ljava/lang/Class;)Z", false);
Label l1 = new Label();
mv.visitJumpInsn(IFEQ, l1);
mv.visitLabel(l0);
mv.visitInsn(ICONST_1);
Label l2 = new Label();
mv.visitJumpInsn(GOTO, l2);
mv.visitLabel(l1);
mv.visitInsn(ICONST_0);
mv.visitLabel(l2);
mv.visitInsn(IRETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
}
Example 8
| Source File: DefaultApplicationFactory.java From thorntail with Apache License 2.0 | 5 votes |
|
static byte[] basicClassBytes() {
ClassWriter cw = new ClassWriter(0);
MethodVisitor mv;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "org/wildfly/swarm/jaxrs/runtime/DefaultApplication", null, "javax/ws/rs/core/Application", null);
cw.visitSource("DefaultApplication.java", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLineNumber(23, l0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "javax/ws/rs/core/Application", "<init>", "()V", false);
mv.visitInsn(RETURN);
Label l1 = new Label();
mv.visitLabel(l1);
mv.visitLocalVariable("this", "Lorg/wildfly/swarm/jaxrs/runtime/DefaultApplication;", null, l0, l1, 0);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
Example 9
| Source File: AdviceGenerator.java From glowroot with Apache License 2.0 | 5 votes |
|
private static void addOnAfterMethodTimerOnly(ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onAfter",
"(Lorg/glowroot/agent/plugin/api/Timer;)V", null, null);
visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnAfter;");
checkNotNull(mv.visitParameterAnnotation(0,
"Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true)).visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/Timer", "stop", "()V",
true);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
Example 10
| Source File: AsmTest.java From java-master with Apache License 2.0 | 5 votes |
|
@Test
public void ModifyClassTest() throws Exception {
// 读取的Person类的class文件
ClassReader classReader = new ClassReader("org.javamaster.b2c.bytecode.model.Person");
ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
ClassAdapter classAdapter = new ClassAdapter(classWriter);
classReader.accept(classAdapter, ClassReader.SKIP_DEBUG);
// 插入新方法
// Opcodes.ACC_PUBLIC:方法修饰符为public
// sayHello:方法名为sayHello
// ()V:没有入参,返回类型为void
// new String[]{"javax.validation.ValidationException"}:声明抛出ValidationException异常
MethodVisitor helloVisitor = classWriter
.visitMethod(Opcodes.ACC_PUBLIC, "sayHello", "()V", null, new String[]{"javax.validation.ValidationException"});
// 插入方法体内容,以下涉及到了虚拟机字节码指令
helloVisitor.visitCode();
// getstatic 指令:取静态字段
helloVisitor.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
// ldc 指令:取"hello world!"常量到操作数栈
helloVisitor.visitLdcInsn("hello world!");
// invokevirtual 指令: 调用实例方法println
helloVisitor.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
// return 指令: 从当前方法返回void
helloVisitor.visitInsn(Opcodes.RETURN);
helloVisitor.visitMaxs(1, 1);
helloVisitor.visitEnd();
byte[] bytes = classWriter.toByteArray();
String path = ResourceUtils.getFile("classpath:").getAbsolutePath();
File file = new File(path, "/org/javamaster/b2c/bytecode/PersonModify.class");
FileOutputStream fileOutputStream = new FileOutputStream(file);
fileOutputStream.write(bytes);
fileOutputStream.close();
}
Example 11
| Source File: ConstructorAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
static void insertNewInstance (ClassWriter cw, String classNameInternal) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "newInstance", "()Ljava/lang/Object;", null, null);
mv.visitCode();
mv.visitTypeInsn(NEW, classNameInternal);
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, classNameInternal, "<init>", "()V");
mv.visitInsn(ARETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
Example 12
| Source File: DynamicEntityGenerator.java From we-cmdb with Apache License 2.0 | 5 votes |
|
private static void writeGetterForMapperBy(ClassWriter classWriter, FieldNode field, String className, String getter) {
MethodVisitor methodVisitor;
AnnotationVisitor annotationVisitor0;
methodVisitor = classWriter.visitMethod(ACC_PUBLIC, getter, "()Ljava/util/Set;", "()" + getTypeSiganitureForOneToMany(field.getTypeDesc()), null);
if (DynamicEntityType.MultiReference.equals(field.getEntityType())) {
annotationVisitor0 = methodVisitor.visitAnnotation("Ljavax/persistence/ManyToMany;", true);
annotationVisitor0.visit("mappedBy", field.getMappedBy());
annotationVisitor0.visitEnd();
} else {
annotationVisitor0 = methodVisitor.visitAnnotation("Ljavax/persistence/OneToMany;", true);
annotationVisitor0.visit("mappedBy", field.getMappedBy());
if (DynamicEntityType.MultiSelection.equals(field.getEntityType())) {
annotationVisitor0.visitEnum("fetch", "Ljavax/persistence/FetchType;", "EAGER");
AnnotationVisitor annotationVisitor1 = annotationVisitor0.visitArray("cascade");
annotationVisitor1.visitEnum(null, "Ljavax/persistence/CascadeType;", CascadeType.ALL.toString());
annotationVisitor1.visitEnd();
}
annotationVisitor0.visitEnd();
}
{
annotationVisitor0 = methodVisitor.visitAnnotation("Lcom/fasterxml/jackson/annotation/JsonIgnore;", true);
annotationVisitor0.visitEnd();
}
// getter method body
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitFieldInsn(GETFIELD, className, field.getName(), "Ljava/util/Set;");
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitMaxs(1, 1);
methodVisitor.visitEnd();
}
Example 13
| Source File: ModClassGenerator.java From customstuff4 with GNU General Public License v3.0 | 4 votes |
|
private static byte[] generateClassCode(ModInfo info)
{
checkArgument(info.isValid(), "Invalid mod id");
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "cs4mod/" + info.id, null, "java/lang/Object", new String[] {CS4_MOD});
// Mod annotation
AnnotationVisitor av = cw.visitAnnotation(String.format("L%s;", MOD), true);
av.visit("modid", info.id);
av.visit("name", info.name);
av.visit("version", info.version);
av.visit("dependencies", String.format("required-after:%s;%s", CustomStuff4.ID, info.dependencies));
av.visitEnd();
// Constructor
MethodVisitor 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.visitFieldInsn(GETSTATIC, "net/minecraftforge/common/MinecraftForge", "EVENT_BUS", desc(EVENT_BUS));
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEVIRTUAL, EVENT_BUS, "register", voidMethodDesc("java/lang/Object"), false);
mv.visitInsn(RETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
// PreInit
mv = cw.visitMethod(ACC_PUBLIC, "preInit", voidMethodDesc(PRE_INIT_EVENT), null, null);
av = mv.visitAnnotation(String.format("L%s;", EVENT_HANDLER), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onPreInitMod", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
// Init
mv = cw.visitMethod(ACC_PUBLIC, "init", voidMethodDesc(INIT_EVENT), null, null);
av = mv.visitAnnotation(String.format("L%s;", EVENT_HANDLER), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onInitMod", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
// PostInit
mv = cw.visitMethod(ACC_PUBLIC, "postInit", voidMethodDesc(POST_INIT_EVENT), null, null);
av = mv.visitAnnotation(String.format("L%s;", EVENT_HANDLER), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onPostInitMod", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
// RegisterBlocks
mv = cw.visitMethod(ACC_PUBLIC, "onRegisterBlocks", voidMethodDesc(REGISTER_BLOCKS_EVENT), voidMethodDesc(REGISTER_BLOCKS_SIGNATURE), null);
av = mv.visitAnnotation(desc(SUBSCRIBE_EVENT), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onRegisterBlocks", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
// RegisterItems
mv = cw.visitMethod(ACC_PUBLIC, "onRegisterItems", voidMethodDesc(REGISTER_ITEMS_EVENT), voidMethodDesc(REGISTER_ITEMS_SIGNATURE), null);
av = mv.visitAnnotation(desc(SUBSCRIBE_EVENT), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onRegisterItems", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
// RegisterModels
mv = cw.visitMethod(ACC_PUBLIC, "onRegisterModels", voidMethodDesc(REGISTER_MODELS_EVENT), null, null);
av = mv.visitAnnotation(desc(SUBSCRIBE_EVENT), true);
av.visitEnd();
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESTATIC, MOD_LOADER, "onRegisterModels", voidMethodDesc(CS4_MOD), false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 2);
mv.visitEnd();
return cw.toByteArray();
}
Example 14
| Source File: SpelCompiler.java From bistoury with GNU General Public License v3.0 | 4 votes |
|
/**
* Generate the class that encapsulates the compiled expression and define it.
* The generated class will be a subtype of CompiledExpression.
*
* @param expressionToCompile the expression to be compiled
* @return the expression call, or {@code null} if the decision was to opt out of
* compilation during code generation
*/
@SuppressWarnings("unchecked")
private Class<? extends CompiledExpression> createExpressionClass(SpelNodeImpl expressionToCompile) {
// Create class outline 'spel/ExNNN extends org.springframework.expression.spel.CompiledExpression'
String clazzName = "qunar/tc/bistoury/instrument/client/debugger/Ex" + getNextSuffix();
ClassWriter cw = new ExpressionClassWriter();
cw.visit(V1_5, ACC_PUBLIC, clazzName, null, "qunar/tc/bistoury/instrument/client/debugger/CompiledExpression", null);
// Create default constructor
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "qunar/tc/bistoury/instrument/client/debugger/CompiledExpression",
"<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
// Create getValue() method
mv = cw.visitMethod(ACC_PUBLIC, "getValue",
"(Ljava/lang/Object;Lqunar/tc/bistoury/instrument/client/debugger/EvaluationContext;)Ljava/lang/Object;", null,
new String[]{"qunar/tc/bistoury/instrument/client/debugger/EvaluationException"});
mv.visitCode();
CodeFlow cf = new CodeFlow(clazzName, cw);
// Ask the expression AST to generate the body of the method
try {
expressionToCompile.generateCode(mv, cf);
} catch (IllegalStateException ex) {
if (logger.isDebugEnabled()) {
logger.debug(expressionToCompile.getClass().getSimpleName() +
".generateCode opted out of compilation: " + ex.getMessage());
}
return null;
}
CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor());
if ("V".equals(cf.lastDescriptor())) {
mv.visitInsn(ACONST_NULL);
}
mv.visitInsn(ARETURN);
mv.visitMaxs(0, 0); // not supplied due to COMPUTE_MAXS
mv.visitEnd();
cw.visitEnd();
cf.finish();
byte[] data = cw.toByteArray();
// TODO need to make this conditionally occur based on a debug flag
// dump(expressionToCompile.toStringAST(), clazzName, data);
return (Class<? extends CompiledExpression>) this.ccl.defineClass(clazzName.replaceAll("/", "."), data);
}
Example 15
| Source File: UnbalancedMonitorsTest.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
private static void visitWrongOrder(ClassWriter cw) {
MethodVisitor mv;
mv = cw.visitMethod(ACC_PUBLIC, "wrongOrder", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", null, null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, null);
Label l3 = new Label();
mv.visitTryCatchBlock(l2, l3, l2, null);
Label l4 = new Label();
Label l5 = new Label();
Label l6 = new Label();
mv.visitTryCatchBlock(l4, l5, l6, null);
Label l7 = new Label();
mv.visitTryCatchBlock(l2, l7, l6, null);
Label l8 = new Label();
mv.visitLabel(l8);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 3);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, 2);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 4);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l1);
// Swapped exit order with exit above
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l5);
mv.visitInsn(ARETURN);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_FULL, 5, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object",
"java/lang/Object"}, 1, new Object[]{"java/lang/Throwable"});
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l3);
mv.visitInsn(ATHROW);
mv.visitLabel(l6);
mv.visitFrame(Opcodes.F_FULL, 4, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object"}, 1,
new Object[]{"java/lang/Throwable"});
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l7);
mv.visitInsn(ATHROW);
Label l9 = new Label();
mv.visitLabel(l9);
mv.visitMaxs(2, 5);
mv.visitEnd();
}
Example 16
| Source File: AdviceGenerator.java From glowroot with Apache License 2.0 | 4 votes |
|
private void addStaticInitializer(ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
mv.visitCode();
if (pluginId != null) {
mv.visitLdcInsn(pluginId);
mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/plugin/api/Agent",
"getConfigService",
"(Ljava/lang/String;)Lorg/glowroot/agent/plugin/api/config/ConfigService;",
false);
mv.visitFieldInsn(PUTSTATIC, adviceInternalName, "configService",
"Lorg/glowroot/agent/plugin/api/config/ConfigService;");
}
if (config.isTimerOrGreater()) {
mv.visitLdcInsn(Type.getObjectType(adviceInternalName));
mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/plugin/api/Agent", "getTimerName",
"(Ljava/lang/Class;)Lorg/glowroot/agent/plugin/api/TimerName;", false);
mv.visitFieldInsn(PUTSTATIC, adviceInternalName, "timerName",
"Lorg/glowroot/agent/plugin/api/TimerName;");
}
if (!config.enabledProperty().isEmpty() && pluginId != null) {
mv.visitFieldInsn(GETSTATIC, adviceInternalName, "configService",
"Lorg/glowroot/agent/plugin/api/config/ConfigService;");
mv.visitLdcInsn(config.enabledProperty());
mv.visitMethodInsn(INVOKEINTERFACE,
"org/glowroot/agent/plugin/api/config/ConfigService", "getBooleanProperty",
"(Ljava/lang/String;)Lorg/glowroot/agent/plugin/api/config/BooleanProperty;",
true);
mv.visitFieldInsn(PUTSTATIC, adviceInternalName, "enabled",
"Lorg/glowroot/agent/plugin/api/config/BooleanProperty;");
}
if (!config.traceEntryEnabledProperty().isEmpty() && pluginId != null) {
mv.visitFieldInsn(GETSTATIC, adviceInternalName, "configService",
"Lorg/glowroot/agent/plugin/api/config/ConfigService;");
mv.visitLdcInsn(config.traceEntryEnabledProperty());
mv.visitMethodInsn(INVOKEINTERFACE,
"org/glowroot/agent/plugin/api/config/ConfigService", "getBooleanProperty",
"(Ljava/lang/String;)Lorg/glowroot/agent/plugin/api/config/BooleanProperty;",
true);
mv.visitFieldInsn(PUTSTATIC, adviceInternalName, "entryEnabled",
"Lorg/glowroot/agent/plugin/api/config/BooleanProperty;");
}
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
Example 17
| Source File: FieldAccess.java From reflectasm with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
static private void insertGetString (ClassWriter cw, String classNameInternal, ArrayList<Field> fields) {
int maxStack = 6;
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "getString", "(Ljava/lang/Object;I)Ljava/lang/String;", null, null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 2);
if (!fields.isEmpty()) {
maxStack--;
Label[] labels = new Label[fields.size()];
Label labelForInvalidTypes = new Label();
boolean hasAnyBadTypeLabel = false;
for (int i = 0, n = labels.length; i < n; i++) {
if (fields.get(i).getType().equals(String.class))
labels[i] = new Label();
else {
labels[i] = labelForInvalidTypes;
hasAnyBadTypeLabel = true;
}
}
Label defaultLabel = new Label();
mv.visitTableSwitchInsn(0, labels.length - 1, defaultLabel, labels);
for (int i = 0, n = labels.length; i < n; i++) {
if (!labels[i].equals(labelForInvalidTypes)) {
Field field = fields.get(i);
mv.visitLabel(labels[i]);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitVarInsn(ALOAD, 1);
mv.visitTypeInsn(CHECKCAST, classNameInternal);
mv.visitFieldInsn(GETFIELD, field.getDeclaringClass().getName().replace('.', '/'), field.getName(),
"Ljava/lang/String;");
mv.visitInsn(ARETURN);
}
}
// Rest of fields: different type
if (hasAnyBadTypeLabel) {
mv.visitLabel(labelForInvalidTypes);
mv.visitFrame(F_SAME, 0, null, 0, null);
insertThrowExceptionForFieldType(mv, "String");
}
// Default: field not found
mv.visitLabel(defaultLabel);
mv.visitFrame(F_SAME, 0, null, 0, null);
}
insertThrowExceptionForFieldNotFound(mv);
mv.visitMaxs(maxStack, 3);
mv.visitEnd();
}
Example 18
| Source File: UnbalancedMonitorsTest.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
private static void visitBlockStructured(ClassWriter cw, boolean normalReturnError, boolean tooMany) {
String name = (tooMany ? "tooMany" : "tooFew") + "Exits" + (normalReturnError ? "" : "Exceptional");
// Generate too many or too few exits down the either the normal or exceptional return paths
int exceptionalExitCount = normalReturnError ? 1 : (tooMany ? 2 : 0);
int normalExitCount = normalReturnError ? (tooMany ? 2 : 0) : 1;
MethodVisitor mv;
mv = cw.visitMethod(ACC_PUBLIC, name, "(Ljava/lang/Object;Ljava/lang/Object;)Z", null, null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, null);
Label l3 = new Label();
mv.visitTryCatchBlock(l2, l3, l2, null);
Label l4 = new Label();
Label l5 = new Label();
Label l6 = new Label();
mv.visitTryCatchBlock(l4, l5, l6, null);
Label l7 = new Label();
mv.visitTryCatchBlock(l2, l7, l6, null);
Label l8 = new Label();
mv.visitLabel(l8);
mv.visitVarInsn(ALOAD, 1);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 3);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, 2);
mv.visitInsn(DUP);
mv.visitVarInsn(ASTORE, 4);
mv.visitInsn(MONITORENTER);
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l1);
for (int i = 0; i < normalExitCount; i++) {
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
}
mv.visitLabel(l5);
mv.visitInsn(IRETURN);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_FULL, 5, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object",
"java/lang/Object"}, 1, new Object[]{"java/lang/Throwable"});
mv.visitVarInsn(ALOAD, 4);
mv.visitInsn(MONITOREXIT);
mv.visitLabel(l3);
mv.visitInsn(ATHROW);
mv.visitLabel(l6);
mv.visitFrame(Opcodes.F_FULL, 4, new Object[]{INNER_CLASS_NAME_INTERNAL, "java/lang/Object", "java/lang/Object", "java/lang/Object"}, 1,
new Object[]{"java/lang/Throwable"});
for (int i = 0; i < exceptionalExitCount; i++) {
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(MONITOREXIT);
}
mv.visitLabel(l7);
mv.visitInsn(ATHROW);
Label l9 = new Label();
mv.visitLabel(l9);
mv.visitMaxs(2, 5);
mv.visitEnd();
}
Example 19
| Source File: AdviceGenerator.java From glowroot with Apache License 2.0 | 4 votes |
|
private void addOnReturnMethod(ClassWriter cw) {
boolean entryOrTimer = !config.traceEntryEnabledProperty().isEmpty();
String travelerType =
entryOrTimer ? "Ljava/lang/Object;" : "Lorg/glowroot/agent/plugin/api/TraceEntry;";
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "onReturn",
"(Lorg/glowroot/agent/plugin/api/weaving/OptionalReturn;" + travelerType + ")V",
null, null);
checkNotNull(mv.visitParameterAnnotation(0,
"Lorg/glowroot/agent/plugin/api/weaving/BindOptionalReturn;", true)).visitEnd();
checkNotNull(mv.visitParameterAnnotation(1,
"Lorg/glowroot/agent/plugin/api/weaving/BindTraveler;", true)).visitEnd();
int travelerParamIndex = 1;
visitAnnotation(mv, "Lorg/glowroot/agent/plugin/api/weaving/OnReturn;");
mv.visitCode();
if (!config.traceEntryEnabledProperty().isEmpty()) {
mv.visitVarInsn(ALOAD, travelerParamIndex);
// TraceEntryImpl implements both TraceEntry and Timer so cannot check instanceof Timer
// to differentiate here (but can check isntanceof TraceEntry)
mv.visitTypeInsn(INSTANCEOF, "org/glowroot/agent/plugin/api/TraceEntry");
Label label = new Label();
mv.visitJumpInsn(IFNE, label);
mv.visitVarInsn(ALOAD, travelerParamIndex);
mv.visitTypeInsn(CHECKCAST, "org/glowroot/agent/plugin/api/Timer");
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/Timer", "stop",
"()V", true);
mv.visitInsn(RETURN);
mv.visitLabel(label);
}
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn",
"isVoid", "()Z", true);
Label notVoidLabel = new Label();
Label endIfLabel = new Label();
mv.visitJumpInsn(IFEQ, notVoidLabel);
mv.visitLdcInsn("void");
mv.visitJumpInsn(GOTO, endIfLabel);
mv.visitLabel(notVoidLabel);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/weaving/OptionalReturn",
"getValue", "()Ljava/lang/Object;", true);
mv.visitLabel(endIfLabel);
mv.visitMethodInsn(INVOKESTATIC, "org/glowroot/agent/bytecode/api/Bytecode",
"updateWithReturnValue",
"(Lorg/glowroot/agent/plugin/api/TraceEntry;Ljava/lang/Object;)V", false);
mv.visitVarInsn(ALOAD, travelerParamIndex);
Integer stackTraceThresholdMillis = config.traceEntryStackThresholdMillis();
if (stackTraceThresholdMillis == null) {
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry", "end",
"()V", true);
} else {
mv.visitLdcInsn(stackTraceThresholdMillis.longValue());
mv.visitFieldInsn(GETSTATIC, "java/util/concurrent/TimeUnit", "MILLISECONDS",
"Ljava/util/concurrent/TimeUnit;");
mv.visitMethodInsn(INVOKEINTERFACE, "org/glowroot/agent/plugin/api/TraceEntry",
"endWithLocationStackTrace", "(JLjava/util/concurrent/TimeUnit;)V", true);
}
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
Example 20
| Source File: TestEnumForEclipseCompilerDump.java From AVM with MIT License | 4 votes |
|
public static byte[] generateBytecode() {
ClassWriter classWriter = new ClassWriter(0);
FieldVisitor fieldVisitor;
MethodVisitor methodVisitor;
classWriter.visit(V10, ACC_PUBLIC | ACC_FINAL | ACC_SUPER | ACC_ENUM, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "Ljava/lang/Enum<L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;>;", "java/lang/Enum", null);
{
fieldVisitor = classWriter.visitField(ACC_PUBLIC | ACC_FINAL | ACC_STATIC | ACC_ENUM, "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
fieldVisitor.visitEnd();
}
{
fieldVisitor = classWriter.visitField(ACC_PRIVATE | ACC_FINAL | ACC_STATIC | ACC_SYNTHETIC, "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
fieldVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
methodVisitor.visitCode();
methodVisitor.visitTypeInsn(NEW, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(DUP);
methodVisitor.visitLdcInsn("TEST");
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitMethodInsn(INVOKESPECIAL, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "<init>", "(Ljava/lang/String;I)V", false);
methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(ICONST_1);
methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(DUP);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "TEST", "L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(AASTORE);
methodVisitor.visitFieldInsn(PUTSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(4, 0);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PRIVATE, "<init>", "(Ljava/lang/String;I)V", null, null);
methodVisitor.visitCode();
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitVarInsn(ALOAD, 1);
methodVisitor.visitVarInsn(ILOAD, 2);
methodVisitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Enum", "<init>", "(Ljava/lang/String;I)V", false);
methodVisitor.visitInsn(RETURN);
methodVisitor.visitMaxs(3, 3);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "values", "()[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
methodVisitor.visitCode();
methodVisitor.visitFieldInsn(GETSTATIC, PACKAGE_NAME_INTERNAL + "/TestEnumForValues", "ENUM$VALUES", "[L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;");
methodVisitor.visitInsn(DUP);
methodVisitor.visitVarInsn(ASTORE, 0);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitInsn(ARRAYLENGTH);
methodVisitor.visitInsn(DUP);
methodVisitor.visitVarInsn(ISTORE, 1);
methodVisitor.visitTypeInsn(ANEWARRAY, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(DUP);
methodVisitor.visitVarInsn(ASTORE, 2);
methodVisitor.visitInsn(ICONST_0);
methodVisitor.visitVarInsn(ILOAD, 1);
methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/System", "arraycopy", "(Ljava/lang/Object;ILjava/lang/Object;II)V", false);
methodVisitor.visitVarInsn(ALOAD, 2);
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitMaxs(5, 3);
methodVisitor.visitEnd();
}
{
methodVisitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, "valueOf", "(Ljava/lang/String;)L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;", null, null);
methodVisitor.visitCode();
methodVisitor.visitLdcInsn(Type.getType("L" + PACKAGE_NAME_INTERNAL + "/TestEnumForValues;"));
methodVisitor.visitVarInsn(ALOAD, 0);
methodVisitor.visitMethodInsn(INVOKESTATIC, "java/lang/Enum", "valueOf", "(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;", false);
methodVisitor.visitTypeInsn(CHECKCAST, PACKAGE_NAME_INTERNAL + "/TestEnumForValues");
methodVisitor.visitInsn(ARETURN);
methodVisitor.visitMaxs(2, 1);
methodVisitor.visitEnd();
}
classWriter.visitEnd();
return classWriter.toByteArray();
}
