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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
date Tue, 16 Nov 2010 14:07:33 -0800
parents c18cbe5936b8
children da0999c4b733
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#
# Copyright (c) 2005, 2008, 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.
#  
#

# Rules to build signal interposition library, used by vm.make

# libjsig[_g].so: signal interposition library
JSIG      = jsig
LIBJSIG   = lib$(JSIG).so

JSIG_G    = $(JSIG)$(G_SUFFIX)
LIBJSIG_G = lib$(JSIG_G).so

JSIGSRCDIR = $(GAMMADIR)/src/os/$(Platform_os_family)/vm

DEST_JSIG  = $(JDK_LIBDIR)/$(LIBJSIG)

LIBJSIG_MAPFILE = $(MAKEFILES_DIR)/mapfile-vers-jsig

LFLAGS_JSIG += $(MAPFLAG:FILENAME=$(LIBJSIG_MAPFILE))

ifdef USE_GCC
LFLAGS_JSIG += -D_REENTRANT
else
LFLAGS_JSIG += -mt -xnolib
endif

$(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
	@echo Making signal interposition lib...
	$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG) \
                         $(LFLAGS_JSIG) -o $@ $< -ldl
	[ -f $(LIBJSIG_G) ] || { ln -s $@ $(LIBJSIG_G); }

install_jsig: $(LIBJSIG)
	@echo "Copying $(LIBJSIG) to $(DEST_JSIG)"
	$(QUIETLY) cp -f $(LIBJSIG) $(DEST_JSIG) && echo "Done"

.PHONY: install_jsig