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6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
Summary: An evacuation failure while copying the roots caused an object, A, to be forwarded to itself. During the subsequent RSet updating a reference to A was processed causing the reference to be added to the RSet of A's heap region. As a result of adding to the remembered set we ran into the issue described in 6930581 - the sparse table expanded and the RSet scanning code walked the cards in one instance of RHashTable (_cur) while the occupied() counts the cards in the expanded table (_next).
Reviewed-by: tonyp, iveresov
author | johnc |
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date | Tue, 16 Nov 2010 14:07:33 -0800 |
parents | c18cbe5936b8 |
children | c7db7adb83b4 |
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# # Copyright (c) 2006, 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 # under the terms of the GNU General Public License version 2 only, as # published by the Free Software Foundation. # # This code is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License # version 2 for more details (a copy is included in the LICENSE file that # accompanied this code). # # You should have received a copy of the GNU General Public License version # 2 along with this work; if not, write to the Free Software Foundation, # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. # # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA # or visit www.oracle.com if you need additional information or have any # questions. # # # JPRT rule to build this workspace JPRT_ARCHIVE_BUNDLE=$(ABS_OUTPUTDIR)/$(JPRT_BUILD_FLAVOR)-bundle.zip ifdef JPRT_BUILD_VERSION MILESTONE=$(JPRT_BUILD_VERSION) endif ifeq ($(OSNAME),windows) ZIPFLAGS=-q else # store symbolic links as the link ZIPFLAGS=-q -y endif jprt_build_product: all_product copy_product_jdk export_product_jdk ( $(CD) $(JDK_IMAGE_DIR) && \ $(ZIPEXE) $(ZIPFLAGS) -r $(JPRT_ARCHIVE_BUNDLE) . ) jprt_build_fastdebug: all_fastdebug copy_fastdebug_jdk export_fastdebug_jdk ( $(CD) $(JDK_IMAGE_DIR)/fastdebug && \ $(ZIPEXE) $(ZIPFLAGS) -r $(JPRT_ARCHIVE_BUNDLE) . ) jprt_build_debug: all_debug copy_debug_jdk export_debug_jdk ( $(CD) $(JDK_IMAGE_DIR)/debug && \ $(ZIPEXE) $(ZIPFLAGS) -r $(JPRT_ARCHIVE_BUNDLE) . ) .PHONY: jprt_build_product jprt_build_fastdebug jprt_build_debug