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8038468: java/lang/instrument/ParallelTransformerLoader.sh fails with ClassCircularityError

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Add check null for loader in transform to avoid when loading a class in callback handler for boot loader, CFLH set early enough to catch classes needed during class loading, i.e. sun.misc.URLClassPath$JarLoader$2 seen in the failure.

Reviewed-by: acorn, sspitsyn
This commit is contained in:
Yumin Qi 2014-11-26 15:33:43 -08:00 committed by Yumin Qi
parent cd0bc39ec5
commit 2ae66a0f29
1 changed files with 8 additions and 17 deletions
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25
jdk/test/java/lang/instrument/ParallelTransformerLoaderAgent.java
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@ -79,24 +79,15 @@ public class ParallelTransformerLoaderAgent
throws IllegalClassFormatException
{
String tName = Thread.currentThread().getName();
// In 160_03 and older, transform() is called
// with the "system_loader_lock" held and that
// prevents the bootstrap class loaded from
// running in parallel. If we add a slight sleep
// delay here when the transform() call is not
// main or TestThread, then the deadlock in
// 160_03 and older is much more reproducible.
if (!tName.equals("main") && !tName.equals("TestThread")) {
System.out.println("Thread '" + tName +
"' has called transform()");
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
}
}
// load additional classes when called from other threads
if (!tName.equals("main"))
// Load additional classes when called from thread 'TestThread'
// When a class is loaded during a callback handling the boot loader, we can
// run into ClassCircularityError if the ClassFileLoadHook is set early enough
// to catch classes needed during class loading, e.g.
// sun.misc.URLClassPath$JarLoader$2.
// The goal of the test is to stress class loading on the test class loaders.
if (tName.equals("TestThread") && loader != null)
{
loadClasses(3);
}