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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 |
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# # Copyright (c) 2009, 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. # # PKGLIST = \ com.sun.hotspot.tools.compiler #END PKGLIST FILELIST = com/sun/hotspot/tools/compiler/*.java ifneq "x$(ALT_BOOTDIR)" "x" BOOTDIR := $(ALT_BOOTDIR) endif ifeq "x$(BOOTDIR)" "x" JDK_HOME := $(shell dirname $(shell which java))/.. else JDK_HOME := $(BOOTDIR) endif isUnix := $(shell test -r c:/; echo $$?) ifeq "$(isUnix)" "1" CPS := : else CPS := ";" endif SRC_DIR = src BUILD_DIR = build OUTPUT_DIR = $(BUILD_DIR)/classes # gnumake 3.78.1 does not accept the *s, # so use the shell to expand them ALLFILES := $(patsubst %,$(SRC_DIR)/%,$(FILELIST)) ALLFILES := $(shell /bin/ls $(ALLFILES)) JAVAC = $(JDK_HOME)/bin/javac JAR = $(JDK_HOME)/bin/jar # Tagging it on because there's no reason not to run it all: logc.jar logc.jar: filelist manifest.mf @mkdir -p $(OUTPUT_DIR) $(JAVAC) -source 1.5 -deprecation -sourcepath $(SRC_DIR) -d $(OUTPUT_DIR) @filelist $(JAR) cvfm logc.jar manifest.mf -C $(OUTPUT_DIR) com .PHONY: filelist filelist: $(ALLFILES) @rm -f $@ @echo $(ALLFILES) > $@ clean:: rm -rf filelist logc.jar rm -rf $(BUILD_DIR)