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Quick Lists
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Bug ID:
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6822263
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Votes
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0
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Synopsis
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G1: JVMTI heap iteration fails
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Category
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hotspot:garbage_collector
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Reported Against
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Release Fixed
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hs15(b05),
7(b54) (Bug ID:2175667)
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State
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10-Fix Delivered,
bug
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Priority:
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3-Medium
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Related Bugs
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Submit Date
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25-MAR-2009
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Description
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JVM fails guarantee with a G1 collector after going through a JVMTI heap iteration with a subsequent full GC:
# Internal Error (/tmp/jprt/P1/B/025853.ap31282/source/src/share/vm/classfile/dictionary.cpp:262), pid=3474, tid=9
# Error: guarantee(!is_alive->do_object_b(k_def_class_loader),"defining loader should not be live if klass is not")
Posted Date : 2009-03-25 21:50:54.0
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Work Around
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N/A
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Evaluation
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JVMTI reachable objects iteration functions use a call to object_iterate() to clean the marking bits of the objects (it uses marking bits to track the vertices of the object graph that it visits). The semantics of the object_iterate() include iteration over the perm gen. However G1 doesn't do that. The fix is to include the perm gen objects in the iterable set.
Posted Date : 2009-03-25 21:50:54.0
http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/4ac7d97e6101
Posted Date : 2009-03-26 18:23:51.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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