Thu, 20 Nov 2008 16:56:09 -0800
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
duke@435 | 1 | #!echo "This is not a shell script" |
duke@435 | 2 | ############################################################################# |
duke@435 | 3 | # |
duke@435 | 4 | # Copyright 2006-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 5 | # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 6 | # |
duke@435 | 7 | # This code is free software; you can redistribute it and/or modify it |
duke@435 | 8 | # under the terms of the GNU General Public License version 2 only, as |
duke@435 | 9 | # published by the Free Software Foundation. |
duke@435 | 10 | # |
duke@435 | 11 | # This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 12 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 13 | # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 14 | # version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 15 | # accompanied this code). |
duke@435 | 16 | # |
duke@435 | 17 | # You should have received a copy of the GNU General Public License version |
duke@435 | 18 | # 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 19 | # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 20 | # |
duke@435 | 21 | # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 22 | # CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 23 | # have any questions. |
duke@435 | 24 | # |
duke@435 | 25 | ############################################################################# |
duke@435 | 26 | |
duke@435 | 27 | ############################################################################# |
duke@435 | 28 | # |
duke@435 | 29 | # JPRT shell configuration for testing. |
duke@435 | 30 | # |
duke@435 | 31 | # Input environment variables: |
duke@435 | 32 | # Windows Only: |
duke@435 | 33 | # PATH |
duke@435 | 34 | # ROOTDIR |
duke@435 | 35 | # |
duke@435 | 36 | # Output variable settings: |
duke@435 | 37 | # make Full path to GNU make |
duke@435 | 38 | # |
duke@435 | 39 | # Output environment variables: |
duke@435 | 40 | # PATH |
duke@435 | 41 | # |
duke@435 | 42 | ############################################################################# |
duke@435 | 43 | |
duke@435 | 44 | ############################################################################# |
duke@435 | 45 | # Error |
duke@435 | 46 | error() # message |
duke@435 | 47 | { |
duke@435 | 48 | echo "ERROR: $1" |
duke@435 | 49 | exit 6 |
duke@435 | 50 | } |
duke@435 | 51 | # Directory must exist |
duke@435 | 52 | dirMustExist() # dir name |
duke@435 | 53 | { |
duke@435 | 54 | if [ ! -d "$1" ] ; then |
duke@435 | 55 | error "Directory for $2 does not exist: $1" |
duke@435 | 56 | fi |
duke@435 | 57 | } |
duke@435 | 58 | # File must exist |
duke@435 | 59 | fileMustExist() # dir name |
duke@435 | 60 | { |
duke@435 | 61 | if [ ! -f "$1" ] ; then |
duke@435 | 62 | error "File for $2 does not exist: $1" |
duke@435 | 63 | fi |
duke@435 | 64 | } |
duke@435 | 65 | ############################################################################# |
duke@435 | 66 | |
duke@435 | 67 | # Should be set by JPRT as the 3 basic inputs |
duke@435 | 68 | slashjava="${ALT_SLASH_JAVA}" |
duke@435 | 69 | if [ "${slashjava}" = "" ] ; then |
duke@435 | 70 | slashjava=/java |
duke@435 | 71 | fi |
duke@435 | 72 | |
duke@435 | 73 | # Check input |
duke@435 | 74 | dirMustExist "${slashjava}" ALT_SLASH_JAVA |
duke@435 | 75 | |
duke@435 | 76 | # Uses 'uname -s', but only expect SunOS or Linux, assume Windows otherwise. |
duke@435 | 77 | osname=`uname -s` |
duke@435 | 78 | if [ "${osname}" = SunOS ] ; then |
duke@435 | 79 | |
duke@435 | 80 | # SOLARIS: Sparc or X86 |
duke@435 | 81 | osarch=`uname -p` |
duke@435 | 82 | if [ "${osarch}" = sparc ] ; then |
duke@435 | 83 | solaris_arch=sparc |
duke@435 | 84 | else |
duke@435 | 85 | solaris_arch=i386 |
duke@435 | 86 | fi |
duke@435 | 87 | |
duke@435 | 88 | # Add basic solaris system paths |
duke@435 | 89 | path4sdk=/usr/ccs/bin:/usr/ccs/lib:/usr/bin:/bin:/usr/sfw/bin |
duke@435 | 90 | |
duke@435 | 91 | # Find GNU make |
duke@435 | 92 | make=/usr/sfw/bin/gmake |
duke@435 | 93 | if [ ! -f ${make} ] ; then |
duke@435 | 94 | make=/opt/sfw/bin/gmake |
duke@435 | 95 | if [ ! -f ${make} ] ; then |
duke@435 | 96 | make=${slashjava}/devtools/${solaris_arch}/bin/gnumake |
duke@435 | 97 | fi |
duke@435 | 98 | fi |
duke@435 | 99 | fileMustExist "${make}" make |
duke@435 | 100 | |
duke@435 | 101 | # File creation mask |
duke@435 | 102 | umask 002 |
duke@435 | 103 | |
duke@435 | 104 | elif [ "${osname}" = Linux ] ; then |
duke@435 | 105 | |
duke@435 | 106 | # Add basic paths |
duke@435 | 107 | path4sdk=/usr/bin:/bin:/usr/sbin:/sbin |
duke@435 | 108 | |
duke@435 | 109 | # Find GNU make |
duke@435 | 110 | make=/usr/bin/make |
duke@435 | 111 | fileMustExist "${make}" make |
duke@435 | 112 | |
duke@435 | 113 | umask 002 |
duke@435 | 114 | |
duke@435 | 115 | else |
duke@435 | 116 | |
duke@435 | 117 | # Windows: Differs on CYGWIN vs. MKS. |
duke@435 | 118 | |
duke@435 | 119 | # We need to determine if we are running a CYGWIN shell or an MKS shell |
duke@435 | 120 | # (if uname isn't available, then it will be unix_toolset=unknown) |
duke@435 | 121 | unix_toolset=unknown |
duke@435 | 122 | if [ "`uname -a | fgrep Cygwin`" = "" -a -d "${ROOTDIR}" ] ; then |
duke@435 | 123 | # We kind of assume ROOTDIR is where MKS is and it's ok |
duke@435 | 124 | unix_toolset=MKS |
duke@435 | 125 | mkshome=`dosname -s "${ROOTDIR}"` |
duke@435 | 126 | # Most unix utilities are in the mksnt directory of ROOTDIR |
duke@435 | 127 | unixcommand_path="${mkshome}/mksnt" |
duke@435 | 128 | path4sdk="${unixcommand_path}" |
duke@435 | 129 | devtools_path="${slashjava}/devtools/win32/bin" |
duke@435 | 130 | path4sdk="${devtools_path};${path4sdk}" |
duke@435 | 131 | # Find GNU make |
duke@435 | 132 | make="${devtools_path}/gnumake.exe" |
duke@435 | 133 | fileMustExist "${make}" make |
duke@435 | 134 | elif [ "`uname -a | fgrep Cygwin`" != "" -a -f /bin/cygpath ] ; then |
duke@435 | 135 | # For CYGWIN, uname will have "Cygwin" in it, and /bin/cygpath should exist |
duke@435 | 136 | unix_toolset=CYGWIN |
duke@435 | 137 | # Most unix utilities are in the /usr/bin |
duke@435 | 138 | unixcommand_path="/usr/bin" |
duke@435 | 139 | path4sdk="${unixcommand_path}" |
duke@435 | 140 | # Find GNU make |
duke@435 | 141 | make="${unixcommand_path}/make.exe" |
duke@435 | 142 | fileMustExist "${make}" make |
duke@435 | 143 | else |
duke@435 | 144 | echo "WARNING: Cannot figure out if this is MKS or CYGWIN" |
duke@435 | 145 | fi |
duke@435 | 146 | |
duke@435 | 147 | |
duke@435 | 148 | # For windows, it's hard to know where the system is, so we just add this |
duke@435 | 149 | # to PATH. |
duke@435 | 150 | slash_path="`echo ${path4sdk} | sed -e 's@\\\\@/@g' -e 's@//@/@g' -e 's@/$@@' -e 's@/;@;@g'`" |
duke@435 | 151 | path4sdk="${slash_path};${PATH}" |
duke@435 | 152 | |
duke@435 | 153 | # Convert path4sdk to cygwin style |
duke@435 | 154 | if [ "${unix_toolset}" = CYGWIN ] ; then |
duke@435 | 155 | path4sdk="`/usr/bin/cygpath -p ${path4sdk}`" |
duke@435 | 156 | fi |
duke@435 | 157 | |
duke@435 | 158 | fi |
duke@435 | 159 | |
duke@435 | 160 | # Export PATH setting |
duke@435 | 161 | PATH="${path4sdk}" |
duke@435 | 162 | export PATH |
duke@435 | 163 |