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8181443: Replace usages of jdk.internal.misc.Unsafe with MethodHandles.Lookup.defineClass

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Reviewed-by: alanb, egahlin
This commit is contained in:
Mandy Chung 2018-10-04 08:45:21 -07:00
parent 4af2374271
commit 73a6313038
9 changed files with 56 additions and 41 deletions
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29
src/java.base/share/classes/java/lang/invoke/ClassSpecializer.java
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@ -37,7 +37,6 @@ import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@ -578,23 +577,17 @@ abstract class ClassSpecializer<T,K,S extends ClassSpecializer<T,K,S>.SpeciesDat
InvokerBytecodeGenerator.maybeDump(classBCName(className), classFile);
Class<?> speciesCode;
ClassLoader cl = topClass().getClassLoader();
ProtectionDomain pd = null;
if (cl != null) {
pd = AccessController.doPrivileged(
new PrivilegedAction<>() {
@Override
public ProtectionDomain run() {
return topClass().getProtectionDomain();
}
});
}
try {
speciesCode = UNSAFE.defineClass(className, classFile, 0, classFile.length, cl, pd);
} catch (Exception ex) {
throw newInternalError(ex);
}
MethodHandles.Lookup lookup = IMPL_LOOKUP.in(topClass());
speciesCode = AccessController.doPrivileged(new PrivilegedAction<>() {
@Override
public Class<?> run() {
try {
return lookup.defineClass(classFile);
} catch (Exception ex) {
throw newInternalError(ex);
}
}
});
return speciesCode.asSubclass(topClass());
}