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8243287: Removal of Unsafe::defineAnonymousClass

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Reviewed-by: iklam, mchung, alanb, dholmes
This commit is contained in:
Harold Seigel 2021-05-13 12:46:54 +00:00
parent a564f2cbd5
commit e14b026841
122 changed files with 328 additions and 3679 deletions
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24
test/hotspot/jtreg/vmTestbase/vm/mlvm/anonloader/share/StressClassLoadingTest.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2010, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -23,6 +23,9 @@
package vm.mlvm.anonloader.share;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.io.File;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicBoolean;
@ -50,7 +53,7 @@ import vm.share.UnsafeAccess;
* and loads it into JVM using either:
* <ul>
* <li>a custom {@link java.lang.ClassLoader} implementation or
* <li>{@link sun.misc.Unsafe#defineAnonymousClass} call.
* <li>{@link java.lang.invoke.MethodHandles.Lookup#defineHiddenClass} call.
* </ul>
*
* <p>Loading is done in a separate thread. If this thread is stuck,
@ -92,12 +95,9 @@ public abstract class StressClassLoadingTest extends MlvmTest {
+ " thread. The parser thread is killed after the timeout")
private static int parseTimeout;
@Option(name = "unsafeLoad", default_value = "false",
description = "An option for adhoc experiments: load class via "
+ "Unsafe.defineAnonymousClass(). Since in this way the "
+ "loading process skips several security checks, if the "
+ "class is not valid, crashes and assertions are normal.")
private static boolean unsafeLoad;
@Option(name = "hiddenLoad", default_value = "false",
description = "An option for adhoc experiments: load class as a hidden class.")
private static boolean hiddenLoad;
private String fileNamePrefix = "";
@ -125,7 +125,7 @@ public abstract class StressClassLoadingTest extends MlvmTest {
optionsSetup = true;
Env.traceNormal("StressClassLoadingTest options: iterations: " + iterations);
Env.traceNormal("StressClassLoadingTest options: unsafeLoad: " + unsafeLoad);
Env.traceNormal("StressClassLoadingTest options: hiddenLoad: " + hiddenLoad);
Env.traceNormal("StressClassLoadingTest options: parseTimeout: " + parseTimeout);
Env.traceNormal("StressClassLoadingTest options: saveClassFile: " + saveClassFile);
}
@ -162,8 +162,10 @@ public abstract class StressClassLoadingTest extends MlvmTest {
public void run() {
try {
Class<?> c;
if (unsafeLoad) {
c = UnsafeAccess.unsafe.defineAnonymousClass(hostClass, classBytes, null);
if (hiddenLoad) {
Lookup lookup = MethodHandles.lookup();
c = lookup.defineHiddenClass(classBytes, true).lookupClass();
} else {
c = CustomClassLoaders.makeClassBytesLoader(classBytes, className)
.loadClass(className);