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view make/bsd/makefiles/adjust-mflags.sh @ 10185:d50cc62e94ff
8012715: G1: GraphKit accesses PtrQueue::_index as int but is size_t
Summary: In graphKit INT operations were generated to access PtrQueue::_index which has type size_t. This is 64 bit on 64-bit machines. No problems occur on little endian machines as long as the index fits into 32 bit, but on big endian machines the upper part is read, which is zero. This leads to unnecessary branches to the slow path in the runtime.
Reviewed-by: twisti, johnc
Contributed-by: Martin Doerr <martin.doerr@sap.com>
author | johnc |
---|---|
date | Wed, 24 Apr 2013 14:48:43 -0700 |
parents | f08d439fab8c |
children | e8d4d0db1f06 |
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#! /bin/sh # # Copyright (c) 1999, 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. # # # This script is used only from top.make. # The macro $(MFLAGS-adjusted) calls this script to # adjust the "-j" arguments to take into account # the HOTSPOT_BUILD_JOBS variable. The default # handling of the "-j" argument by gnumake does # not meet our needs, so we must adjust it ourselves. # This argument adjustment applies to two recursive # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make. # One invokes adlc.make, and the other invokes vm.make. # The adjustment propagates the desired concurrency # level down to the sub-make (of the adlc or vm). # The default behavior of gnumake is to run all # sub-makes without concurrency ("-j1"). # Also, we use a make variable rather than an explicit # "-j<N>" argument to control this setting, so that # the concurrency setting (which must be tuned separately # for each MP system) can be set via an environment variable. # The recommended setting is 1.5x to 2x the number of available # CPUs on the MP system, which is large enough to keep the CPUs # busy (even though some jobs may be I/O bound) but not too large, # we may presume, to overflow the system's swap space. set -eu default_build_jobs=4 case $# in [12]) true;; *) >&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;; esac MFLAGS=$1 HOTSPOT_BUILD_JOBS=${2-} # Normalize any -jN argument to the form " -j${HBJ}" MFLAGS=` echo "$MFLAGS" \ | sed ' s/^-/ -/ s/ -\([^ ][^ ]*\)j/ -\1 -j/ s/ -j[0-9][0-9]*/ -j/ s/ -j\([^ ]\)/ -j -\1/ s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/ ' ` case ${HOTSPOT_BUILD_JOBS} in \ '') case ${MFLAGS} in *\ -j*) >&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile." >&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment." esac;; ?*) case ${MFLAGS} in *\ -j*) true;; *) MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";; esac;; esac echo "${MFLAGS}"