diff options
Diffstat (limited to 'src/main/javassist/util/proxy/DefineClassHelper.java')
| -rw-r--r-- | src/main/javassist/util/proxy/DefineClassHelper.java | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/src/main/javassist/util/proxy/DefineClassHelper.java b/src/main/javassist/util/proxy/DefineClassHelper.java index 3ed261e5..4d6c9f9d 100644 --- a/src/main/javassist/util/proxy/DefineClassHelper.java +++ b/src/main/javassist/util/proxy/DefineClassHelper.java @@ -21,6 +21,7 @@ import java.lang.invoke.MethodHandles; import java.lang.invoke.MethodHandles.Lookup; import java.lang.reflect.Method; import java.security.ProtectionDomain; +import java.util.List; import javassist.CannotCompileException; import javassist.bytecode.ClassFile; @@ -73,8 +74,12 @@ public class DefineClassHelper throw new IllegalAccessError("Access denied for caller."); try { SecurityActions.TheUnsafe usf = SecurityActions.getSunMiscUnsafeAnonymously(); + List<Method> defineClassMethod = usf.methods.get("defineClass"); + // On Java 11+ the defineClass method does not exist anymore + if (null == defineClassMethod) + return null; MethodHandle meth = MethodHandles.lookup() - .unreflect(usf.methods.get("defineClass").get(0)); + .unreflect(defineClassMethod.get(0)); return new ReferencedUnsafe(usf, meth); } catch (Throwable e) { throw new RuntimeException("cannot initialize", e); @@ -171,11 +176,15 @@ public class DefineClassHelper ClassLoader loader, ProtectionDomain protectionDomain) throws ClassFormatError; } - private static final SecuredPrivileged privileged = ClassFile.MAJOR_VERSION >= ClassFile.JAVA_9 - ? SecuredPrivileged.JAVA_9 - : ClassFile.MAJOR_VERSION >= ClassFile.JAVA_7 - ? SecuredPrivileged.JAVA_7 - : SecuredPrivileged.JAVA_OTHER; + // Java 11+ removed sun.misc.Unsafe.defineClass, so we fallback to invoking defineClass on + // ClassLoader until we have an implementation that uses MethodHandles.Lookup.defineClass + private static final SecuredPrivileged privileged = ClassFile.MAJOR_VERSION > ClassFile.JAVA_10 + ? SecuredPrivileged.JAVA_OTHER + : ClassFile.MAJOR_VERSION >= ClassFile.JAVA_9 + ? SecuredPrivileged.JAVA_9 + : ClassFile.MAJOR_VERSION >= ClassFile.JAVA_7 + ? SecuredPrivileged.JAVA_7 + : SecuredPrivileged.JAVA_OTHER; /** * Loads a class file by a given class loader. |