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7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed()) 7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages. Reviewed-by: johnc, tonyp
author ysr
date Tue, 07 Dec 2010 21:55:53 -0800
parents f95d63e2154a
children 0a8e0d4345b3
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#
# Copyright (c) 2005, 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.
#  
#

# Rules to build serviceability agent library, used by vm.make

# libsaproc[_g].so: serviceability agent

SAPROC = saproc
LIBSAPROC = lib$(SAPROC).so

SAPROC_G = $(SAPROC)$(G_SUFFIX)
LIBSAPROC_G = lib$(SAPROC_G).so

AGENT_DIR = $(GAMMADIR)/agent

SASRCDIR = $(AGENT_DIR)/src/os/$(Platform_os_family)

SASRCFILES = $(SASRCDIR)/salibelf.c                   \
             $(SASRCDIR)/symtab.c                     \
             $(SASRCDIR)/libproc_impl.c               \
             $(SASRCDIR)/ps_proc.c                    \
             $(SASRCDIR)/ps_core.c                    \
             $(SASRCDIR)/LinuxDebuggerLocal.c

SAMAPFILE = $(SASRCDIR)/mapfile

DEST_SAPROC = $(JDK_LIBDIR)/$(LIBSAPROC)

# DEBUG_BINARIES overrides everything, use full -g debug information
ifeq ($(DEBUG_BINARIES), true)
  SA_DEBUG_CFLAGS = -g
endif

# if $(AGENT_DIR) does not exist, we don't build SA
# also, we don't build SA on Itanium, PPC, ARM or zero.

ifneq ($(wildcard $(AGENT_DIR)),)
ifneq ($(filter-out ia64 arm ppc zero,$(SRCARCH)),)
  BUILDLIBSAPROC = $(LIBSAPROC)
endif
endif


SA_LFLAGS = $(MAPFLAG:FILENAME=$(SAMAPFILE)) $(LDFLAGS_HASH_STYLE)

$(LIBSAPROC): $(SASRCFILES) $(SAMAPFILE)
	$(QUIETLY) if [ "$(BOOT_JAVA_HOME)" = "" ]; then \
	  echo "ALT_BOOTDIR, BOOTDIR or JAVA_HOME needs to be defined to build SA"; \
	  exit 1; \
	fi
	@echo Making SA debugger back-end...
	$(QUIETLY) $(CC) -D$(BUILDARCH) -D_GNU_SOURCE                   \
                   $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG)     \
	           -I$(SASRCDIR)                                        \
	           -I$(GENERATED)                                       \
	           -I$(BOOT_JAVA_HOME)/include                          \
	           -I$(BOOT_JAVA_HOME)/include/$(Platform_os_family)    \
	           $(SASRCFILES)                                        \
	           $(SA_LFLAGS)                                         \
	           $(SA_DEBUG_CFLAGS)                                   \
	           -o $@                                                \
	           -lthread_db
	$(QUIETLY) [ -f $(LIBSAPROC_G) ] || { ln -s $@ $(LIBSAPROC_G); }

install_saproc: $(BUILDLIBSAPROC)
	$(QUIETLY) if [ -e $(LIBSAPROC) ] ; then             \
	  echo "Copying $(LIBSAPROC) to $(DEST_SAPROC)";     \
	  cp -f $(LIBSAPROC) $(DEST_SAPROC) && echo "Done";  \
	fi

.PHONY: install_saproc