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* version 2 for more details (a copy is included in the LICENSE file that
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/*
* @test
* @bug 8051045 8166974
* @summary Test exceptions from invokedynamic and the bootstrap method
* @modules java.base/jdk.internal.org.objectweb.asm
* @run main BootstrapMethodErrorTest
*/
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.Handle;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import java.lang.invoke.CallSite;
import java.lang.invoke.ConstantCallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.invoke.WrongMethodTypeException;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
public class BootstrapMethodErrorTest {
static abstract class IndyClassloader extends ClassLoader implements Opcodes {
public IndyClassloader() {
super(BootstrapMethodErrorTest.class.getClassLoader());
}
@Override
public Class findClass(String name) throws ClassNotFoundException {
byte[] b;
try {
b = loadClassData(name);
}
catch (Throwable th) {
throw new ClassNotFoundException("Loading error", th);
}
return defineClass(name, b, 0, b.length);
}
static final String BOOTSTRAP_METHOD_CLASS_NAME = "C";
static final String BOOTSTRAP_METHOD_NAME = "bsm";
static final String INDY_CALLER_CLASS_NAME = "Exec";
static final String BOOTSTRAP_METHOD_DESC = MethodType.methodType(
Object.class, MethodHandles.Lookup.class, String.class, MethodType.class).
toMethodDescriptorString();
private byte[] loadClassData(String name) throws Exception {
ClassWriter cw = new ClassWriter(
ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
if (name.equals(BOOTSTRAP_METHOD_CLASS_NAME)) {
defineIndyBootstrapMethodClass(cw);
return cw.toByteArray();
}
else if (name.equals("Exec")) {
defineIndyCallingClass(cw);
return cw.toByteArray();
}
return null;
}
void defineIndyCallingClass(ClassWriter cw) {
cw.visit(52, ACC_SUPER | ACC_PUBLIC, INDY_CALLER_CLASS_NAME, null, "java/lang/Object", null);
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "invoke", "()V", null, null);
mv.visitCode();
Handle h = new Handle(H_INVOKESTATIC,
BOOTSTRAP_METHOD_CLASS_NAME, BOOTSTRAP_METHOD_NAME,
BOOTSTRAP_METHOD_DESC, false);
mv.visitInvokeDynamicInsn(BOOTSTRAP_METHOD_CLASS_NAME, "()V", h);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
cw.visitEnd();
}
void defineIndyBootstrapMethodClass(ClassWriter cw) {
cw.visit(52, ACC_SUPER | ACC_PUBLIC,
BOOTSTRAP_METHOD_CLASS_NAME, null, "java/lang/Object", null);
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC,
BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_DESC, null, null);
mv.visitCode();
defineIndyBootstrapMethodBody(mv);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
void defineIndyBootstrapMethodBody(MethodVisitor mv) {
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
}
void invoke() throws Exception {
Class.forName(BOOTSTRAP_METHOD_CLASS_NAME, true, this);
Class<?> exec = Class.forName(INDY_CALLER_CLASS_NAME, true, this);
exec.getMethod("invoke").invoke(null);
}
void test() throws Exception {
Class.forName(BOOTSTRAP_METHOD_CLASS_NAME, true, this);
Class<?> exec = Class.forName(INDY_CALLER_CLASS_NAME, true, this);
try {
exec.getMethod("invoke").invoke(null);
throw new RuntimeException("Expected InvocationTargetException but no exception at all was thrown");
} catch (InvocationTargetException e) {
Throwable t = e.getCause();
for (Class<? extends Throwable> etc : expectedThrowableClasses()) {
if (!etc.isInstance(t)) {
throw new RuntimeException(
"Expected " + etc.getName() + " but got another exception: "
+ t.getClass().getName(),
t);
}
t = t.getCause();
}
}
}
abstract List<Class<? extends Throwable>> expectedThrowableClasses();
}
// Methods called by a bootstrap method
public static CallSite getCallSite() {
try {
MethodHandle mh = MethodHandles.lookup().findStatic(
BootstrapMethodErrorTest.class,
"target",
MethodType.methodType(Object.class, Object.class));
return new ConstantCallSite(mh);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static Object target(Object o) {
return null;
}
static class TestThrowable extends Throwable {}
public static void throwsTestThrowable() throws Throwable {
throw new TestThrowable();
}
static class TestError extends Error {}
public static void throwsTestError() {
throw new TestError();
}
static class TestRuntimeException extends RuntimeException {}
public static void throwsTestRuntimeException() {
throw new TestRuntimeException();
}
static class TestCheckedException extends Exception {}
public static void throwsTestCheckedException() throws TestCheckedException {
throw new TestCheckedException();
}
// Test classes
static class InaccessibleBootstrapMethod extends IndyClassloader {
void defineIndyBootstrapMethodClass(ClassWriter cw) {
cw.visit(52, ACC_SUPER | ACC_PUBLIC,
BOOTSTRAP_METHOD_CLASS_NAME, null, "java/lang/Object", null);
// Bootstrap method is declared to be private
MethodVisitor mv = cw.visitMethod(ACC_PRIVATE | ACC_STATIC,
BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_DESC, null, null);
mv.visitCode();
defineIndyBootstrapMethodBody(mv);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(IllegalAccessError.class);
}
}
static class BootstrapMethodDoesNotReturnCallSite extends IndyClassloader {
void defineIndyBootstrapMethodBody(MethodVisitor mv) {
// return null from the bootstrap method,
// which cannot be cast to CallSite
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(BootstrapMethodError.class, ClassCastException.class);
}
}
static class BootstrapMethodCallSiteHasWrongTarget extends IndyClassloader {
@Override
void defineIndyBootstrapMethodBody(MethodVisitor mv) {
// Invoke the method BootstrapMethodErrorTest.getCallSite to obtain
// a CallSite instance whose target is different from that of
// the indy call site
mv.visitMethodInsn(INVOKESTATIC, "BootstrapMethodErrorTest",
"getCallSite", "()Ljava/lang/invoke/CallSite;", false);
mv.visitInsn(ARETURN);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(BootstrapMethodError.class, WrongMethodTypeException.class);
}
}
abstract static class BootstrapMethodThrows extends IndyClassloader {
final String methodName;
public BootstrapMethodThrows(Class<? extends Throwable> t) {
this.methodName = "throws" + t.getSimpleName();
}
@Override
void defineIndyBootstrapMethodBody(MethodVisitor mv) {
// Invoke the method whose name is methodName which will throw
// an exception
mv.visitMethodInsn(INVOKESTATIC, "BootstrapMethodErrorTest",
methodName, "()V", false);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ARETURN);
}
}
static class BootstrapMethodThrowsThrowable extends BootstrapMethodThrows {
public BootstrapMethodThrowsThrowable() {
super(TestThrowable.class);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(BootstrapMethodError.class, TestThrowable.class);
}
}
static class BootstrapMethodThrowsError extends BootstrapMethodThrows {
public BootstrapMethodThrowsError() {
super(TestError.class);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(TestError.class);
}
}
static class BootstrapMethodThrowsRuntimeException extends BootstrapMethodThrows {
public BootstrapMethodThrowsRuntimeException() {
super(TestRuntimeException.class);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(BootstrapMethodError.class, TestRuntimeException.class);
}
}
static class BootstrapMethodThrowsCheckedException extends BootstrapMethodThrows {
public BootstrapMethodThrowsCheckedException() {
super(TestCheckedException.class);
}
@Override
List<Class<? extends Throwable>> expectedThrowableClasses() {
return List.of(BootstrapMethodError.class, TestCheckedException.class);
}
}
public static void main(String[] args) throws Exception {
new InaccessibleBootstrapMethod().test();
new BootstrapMethodDoesNotReturnCallSite().test();
new BootstrapMethodCallSiteHasWrongTarget().test();
new BootstrapMethodThrowsThrowable().test();
new BootstrapMethodThrowsError().test();
new BootstrapMethodThrowsRuntimeException().test();
new BootstrapMethodThrowsCheckedException().test();
}
}