#!/bin/bash

#

# Copyright (c) 2012, 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.

#

# MANUAL

#

# ./common/bin/compare-objects.sh old_jdk_build_dir new_jdk_build_dir

#

# Compares object files

#

if [ "x$1" = "x-h" ] || [ "x$1" = "x--help" ] || [ "x$1" == "x" ]; then

    echo "bash ./common/bin/compare-objects.sh old_jdk_build_dir new_jdk_build_dir <pattern>"

    echo ""

    echo "Compare object files"

    echo ""

    exit 10

fi

#######

#

# List of files (grep patterns) that are ignored

# 

# 1) hotspot object files

IGNORE="-e hotspot"

# 2) various build artifacts: sizer.32.o sizer.64.o dummyodbc.o

#    these are produced during build and then e.g run to produce other data

#    i.e not directly put into build => safe to ignore

IGNORE="${IGNORE} -e sizer.32.o -e sizer.64.o"

IGNORE="${IGNORE} -e dummyodbc.o"

IGNORE="${IGNORE} -e genSolarisConstants.o"

IGNORE="${IGNORE} -e genUnixConstants.o"

OLD="$1"

NEW="$2"

shift; shift

PATTERN="$*"

if [ -f $NEW/spec.sh ]; then

    . $NEW/spec.sh

elif [ -f $NEW/../../spec.sh ]; then

    . $NEW/../../spec.sh

elif [ -f $OLD/spec.sh ]; then

    . $OLD/spec.sh

elif [ -f $OLD/../../spec.sh ]; then

    . $OLD/../../spec.sh

else

    echo "Unable to find spec.sh"

    echo "Giving up"

    exit 1

fi

export COMPARE_ROOT=/tmp/cimages.$USER/objects

mkdir -p $COMPARE_ROOT

(${CD} $OLD && ${FIND} . -name '*.o') > $COMPARE_ROOT/list.old

(${CD} $NEW && ${FIND} . -name '*.o') > $COMPARE_ROOT/list.new

# On macosx JobjC is build in both i386 and x86_64 variant (universial binary)

#   but new build only builds the x86_64

# Remove the 386 variants from comparison...to avoid "false" positives

${GREP} -v 'JObjC.dst/Objects-normal/i386' $COMPARE_ROOT/list.old > $COMPARE_ROOT/list.old.new

${CP} $COMPARE_ROOT/list.old $COMPARE_ROOT/list.old.full

${CP} $COMPARE_ROOT/list.old.new $COMPARE_ROOT/list.old

findnew() {

    arg_1=$1

    arg_2=$2

    # special case 1 unpack-cmd => unpackexe

    arg_1=`${ECHO} $arg_1 | ${SED} 's!unpack-cmd!unpackexe!g'`

    arg_2=`${ECHO} $arg_2 | ${SED} 's!unpack-cmd!unpackexe!g'`

    # special case 2 /JObjC.dst/ => /libjobjc/

    arg_1=`${ECHO} $arg_1 | ${SED} 's!/JObjC.dst/!/libjobjc/!g'`

    arg_2=`${ECHO} $arg_2 | ${SED} 's!/JObjC.dst/!/libjobjc/!g'`

    full=`${ECHO} $arg_1 | ${SED} 's!\.!\\\.!g'`

    medium=`${ECHO} $arg_1 | ${SED} 's!.*/\([^/]*/[^/]*\)!\1!'`

    short=`${ECHO} $arg_2 | ${SED} 's!\.!\\\.!g'`

    if [ "`${GREP} -c "/$full" $COMPARE_ROOT/list.new`" -eq 1 ]

    then

	${ECHO} $NEW/$arg_1

	return

    fi

    if [ "`${GREP} -c "$medium" $COMPARE_ROOT/list.new`" -eq 1 ]

    then

	${GREP} "$medium" $COMPARE_ROOT/list.new

	return

    fi

    if [ "`${GREP} -c "/$short" $COMPARE_ROOT/list.new`" -eq 1 ]

    then

	${GREP} "/$short" $COMPARE_ROOT/list.new

	return

    fi

    # old style has "dir" before obj{64}

    dir=`${ECHO} $arg_1 | ${SED} 's!.*/\([^/]*\)/obj[64]*.*!\1!g'`

    if [ -n "$dir" -a "$dir" != "$arg_1" ]

    then

	if [ "`${GREP} $dir $COMPARE_ROOT/list.new | ${GREP} -c "/$short"`" -eq 1 ]

	then

	    ${GREP} $dir $COMPARE_ROOT/list.new | ${GREP} "/$short"

	    return

	fi

	# Try with lib$dir/

	if [ "`${GREP} "lib$dir/" $COMPARE_ROOT/list.new | ${GREP} -c "/$short"`" -eq 1 ]

	then

	    ${GREP} "lib$dir/" $COMPARE_ROOT/list.new | ${GREP} "/$short"

	    return

	fi

	# Try with $dir_objs

	if [ "`${GREP} "${dir}_objs" $COMPARE_ROOT/list.new | ${GREP} -c "/$short"`" -eq 1 ]

	then

	    ${GREP} "${dir}_objs" $COMPARE_ROOT/list.new | ${GREP} "/$short"

	    return

	fi

    fi

    # check for some specifics...

    for i in demo hotspot jobjc

    do

	if [ "`${ECHO} $full | ${GREP} -c $i`" -gt 0 ]

	then

	    if [ "`${GREP} $i $COMPARE_ROOT/list.new | ${GREP} -c "/$short"`" -eq 1 ]

	    then

		${GREP} $i $COMPARE_ROOT/list.new | ${GREP} "/$short"

		return

	    fi

	fi

    done

    # check for specific demo

    demo=`${ECHO} $arg_1 | ${SED} 's!.*/demo/jvmti/\([^/]*\)/.*!\1!g'`

    if [ -n "$demo" -a "$dir" != "$demo" ]

    then

	if [ "`${GREP} $demo $COMPARE_ROOT/list.new | ${GREP} -c "/$short"`" -eq 1 ]

	then

	    ${GREP} $demo $COMPARE_ROOT/list.new | ${GREP} "/$short"

	    return

	fi

    fi

    return

}

compare() {

    old=$1

    new=$2

    ${DIFF} $old $new > /dev/null

    res=$?

    if [ $res -eq 0 ]

    then

	${ECHO} 0

	return

    fi

    # check if stripped objects gives equality

    ${CP} $old $COMPARE_ROOT/`basename $old`.old

    ${CP} $new $COMPARE_ROOT/`basename $old`.new

    ${POST_STRIP_CMD} $COMPARE_ROOT/`basename $old`.old $COMPARE_ROOT/`basename $old`.new > /dev/null 2>&1

    ${DIFF} $COMPARE_ROOT/`basename $old`.old $COMPARE_ROOT/`basename $old`.new > /dev/null

    res=$?

    ${RM} $COMPARE_ROOT/`basename $old`.old $COMPARE_ROOT/`basename $old`.new

    if [ $res -eq 0 ]

    then

	${ECHO} S

	return

    fi

    name=`basename $1 | ${SED} 's!\.o!!'`

    cntold=`strings $old | ${GREP} -c $name`

    cntnew=`strings $new | ${GREP} -c $name`

    if [ $cntold -gt 0 -a $cntnew -gt 0 ]

    then

	${ECHO} F

	return

    fi

    ${ECHO} 1

}

for F in `${CAT} $COMPARE_ROOT/list.old`

do

    if [ "${IGNORE}" ] && [ "`${ECHO} $F | ${GREP} ${IGNORE}`" ]

    then

	#

	# skip ignored files

        #

	continue;

    fi

    if [ "$PATTERN" ] && [ `${ECHO} $F | ${GREP} -c $PATTERN` -eq 0 ]

    then

	continue;

    fi

    f=`basename $F`

    o=$OLD/$F

    n=`findnew $F $f`

    if [ "$n" ]

    then	

	n="$NEW/$n"

	${ECHO} `compare $o $n` : $f : $o : $n

    else

	${ECHO} "- : $f : $o "

    fi

done