ohair@425: #!/bin/bash
ohair@425: #
ohair@425: # Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
ohair@425: # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@425: #
ohair@425: # This code is free software; you can redistribute it and/or modify it
ohair@425: # under the terms of the GNU General Public License version 2 only, as
ohair@425: # published by the Free Software Foundation.
ohair@425: #
ohair@425: # This code is distributed in the hope that it will be useful, but WITHOUT
ohair@425: # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@425: # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ohair@425: # version 2 for more details (a copy is included in the LICENSE file that
ohair@425: # accompanied this code).
ohair@425: #
ohair@425: # You should have received a copy of the GNU General Public License version
ohair@425: # 2 along with this work; if not, write to the Free Software Foundation,
ohair@425: # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@425: #
ohair@425: # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@425: # or visit www.oracle.com if you need additional information or have any
ohair@425: # questions.
ohair@425: #
ohair@425: 
ohair@425: # Simple tool to diff two shared libraries. 
ohair@425: # Criterias: two shared libraries are considered equal if:
ohair@425: # the file sizes are the same AND the symbols outputs from the nm command are equal
ohair@425: 
ohair@425: if [ $# -lt 2 ] 
ohair@425: then
ohair@425:   echo "Diff two shared libs. Return codes:"
ohair@425:   echo "0 - no diff"
ohair@425:   echo "1 - Identical symbols AND size, BUT not bytewise identical"
ohair@425:   echo "2 - Identical symbols BUT NEW size"
ohair@425:   echo "3 - Differences, content BUT SAME size"
ohair@425:   echo "4 - Differences, content AND size"
ohair@425:   echo "10 - Could not perform diff"
ohair@425:   echo "Use 'quiet' to disable any output."
ohair@425:   echo "Syntax: $0 file1 file2 [quiet]"
ohair@425:   exit 10
ohair@425: fi
ohair@425: 
ohair@425: if [ ! -f $1 ]
ohair@425: then
ohair@425:   echo $1 does not exist
ohair@425:   exit 10
ohair@425: fi
ohair@425: 
ohair@425: if [ ! -f $2 ]
ohair@425: then
ohair@425:   echo $2 does not exist
ohair@425:   exit 10
ohair@425: fi
ohair@425: 
ohair@425: if [ "`uname`" == "SunOS" ]; then
erikj@458:     if [ -f "`which gnm`" ]; then
erikj@458:         NM=gnm
erikj@458: # Jonas 2012-05-29: solaris native nm produces radically different output than gnm
erikj@458: #                   so if using that...we need different filter than "cut -f 2-"
erikj@458: #
erikj@458:     elif [ -f "`which nm`" ]; then
erikj@458:         NM=nm
erikj@458:     else
erikj@458:         echo "No nm command found"
erikj@458:         exit 10
erikj@458:     fi
erikj@445:     LDD=ldd
ohair@425: elif [ $OSTYPE == "cygwin" ]; then
ohair@425:     NM="$VS100COMNTOOLS/../../VC/bin/amd64/dumpbin.exe"
ohair@425:     NM_ARGS=/exports
erikj@445:     LDD=
erikj@445: elif [ "`uname`" == "Darwin" ]; then
erikj@445:     NM=nm
erikj@445:     LDD="otool -L"
ohair@425: else
ohair@425:     NM=nm
erikj@445:     LDD=ldd
ohair@425: fi
ohair@425: 
ohair@425: # Should the differences be viewed?
ohair@425: VIEW=
ohair@425: # You can do export DIFF=meld to view
ohair@425: # any differences using meld instead.
ohair@425: if [ -n "$DIFF" ]; then
ohair@425:     DIFF="$DIFF"
ohair@425: else
ohair@425:     DIFF=diff
ohair@425: fi
ohair@425: OLD=$(cd $(dirname $1) && pwd)/$(basename $1)
ohair@425: NEW=$(cd $(dirname $2) && pwd)/$(basename $2)
ohair@425: 
erikj@458: OLD_SIZE=$(ls -l "$OLD" | awk '{ print $5 }')
erikj@458: NEW_SIZE=$(ls -l "$NEW" | awk '{ print $5 }')
ohair@425: 
ohair@425: if [ $# -gt 3 ]
ohair@425: then
ohair@425:     ROOT1=$(cd $3 && pwd)
ohair@425:     ROOT2=$(cd $4 && pwd)
ohair@425:     OLD_NAME=$(echo $OLD | sed "s|$ROOT1/||")
ohair@425:     NEW_NAME=$(echo $NEW | sed "s|$ROOT2/||")
ohair@425:     if [ "x$5" == "xview" ]; then VIEW=view; fi
ohair@425: else
ohair@425:     ROOT1=$(dirname $OLD)/
ohair@425:     ROOT2=$(dirname $NEW)/
ohair@425:     OLD_NAME=$OLD
ohair@425:     NEW_NAME=$NEW
ohair@425:     if [ "x$3" == "xview" ]; then VIEW=view; fi
ohair@425: fi
ohair@425: 
ohair@425: OLD_SUFFIX="${OLD##*.}"
ohair@425: NEW_SUFFIX="${NEW##*.}"
ohair@425: if [ "$OLD_SUFFIX" != "$NEW_SUFFIX" ]; then
ohair@425:     echo The files do not have the same suffix type!
ohair@425:     exit 10
ohair@425: fi
ohair@425: 
ohair@425: if [ "$OLD_SUFFIX" != "so" ] && [ "$OLD_SUFFIX" != "dylib" ] && [ "$OLD_SUFFIX" != "dll" ]; then
ohair@425:     echo The files have to be .so, .dylib or .dll! They are $OLD_SUFFIX
ohair@425:     exit 10
ohair@425: fi
ohair@425: 
ohair@425: TYPE="$OLD_SUFFIX"
ohair@425: 
ohair@425: if cmp $OLD $NEW > /dev/null
ohair@425: then
ohair@425:     # The files were bytewise identical.
ohair@425:     echo Identical: $OLD_NAME
ohair@425:     exit 0
ohair@425: fi
ohair@425: 
erikj@458: OLD_SYMBOLS=$COMPARE_ROOT/nm.$OLD_NAME.old
erikj@458: NEW_SYMBOLS=$COMPARE_ROOT/nm.$NEW_NAME.new
ohair@425: 
ohair@425: mkdir -p $(dirname $OLD_SYMBOLS)
ohair@425: mkdir -p $(dirname $NEW_SYMBOLS)
ohair@425: 
ohair@425: if [ $OSTYPE == "cygwin" ]; then
ohair@425:     "$NM" $NM_ARGS $OLD | grep " = " > $OLD_SYMBOLS
ohair@425:     "$NM" $NM_ARGS $NEW | grep " = " > $NEW_SYMBOLS
ohair@425:     "$NM" $NM_ARGS $OLD > $OLD_SYMBOLS.full
ohair@425:     "$NM" $NM_ARGS $NEW > $NEW_SYMBOLS.full
ohair@425: else
ohair@425:     # Strip the addresses, just compare the ordering of the symbols.
ohair@425:     $NM $OLD | cut -f 2- -d ' ' > $OLD_SYMBOLS
ohair@425:     $NM $NEW | cut -f 2- -d ' ' > $NEW_SYMBOLS
ohair@425:     # But store the full information for easy diff access.
ohair@425:     $NM $OLD  > $OLD_SYMBOLS.full
ohair@425:     $NM $NEW  > $NEW_SYMBOLS.full
ohair@425: fi
ohair@425: 
ohair@425: DIFFS=$(LANG=C diff $OLD_SYMBOLS $NEW_SYMBOLS)
ohair@425: 
ohair@425: RESULT=0
ohair@425: 
erikj@445: if [ "${LDD}" ]
erikj@445: then
erikj@445:     NAME=`basename $OLD`
erikj@445:     TMP=$COMPARE_ROOT/ldd/ldd.${NAME}
erikj@445:     rm -rf "${TMP}"
erikj@445:     mkdir -p "${TMP}"
erikj@445:     
erikj@445:     (cd "${TMP}" && cp $OLD . && ${LDD} ${NAME} | awk '{ print $1;}' | sort | tee dep.old | uniq > dep.uniq.old)
erikj@445:     (cd "${TMP}" && cp $NEW . && ${LDD} ${NAME} | awk '{ print $1;}' | sort | tee dep.new | uniq > dep.uniq.new)
erikj@445:     (cd "${TMP}" && rm -f ${NAME})
erikj@445:     
erikj@445:     DIFFS_DEP=$(LANG=C diff "${TMP}/dep.old" "${TMP}/dep.new")
erikj@445:     DIFFS_UNIQ_DEP=$(LANG=C diff "${TMP}/dep.uniq.old" "${TMP}/dep.uniq.new")
erikj@445:     
erikj@445:     DEP_MSG=
erikj@445:     if [ -z "${DIFFS_UNIQ_DEP}" -a -z "${DIFFS_DEP}" ]; then
erikj@445:        DEP_MSG="Identical dependencies"
erikj@445:     elif [ -z "${DIFFS_UNIQ_DEP}" ]; then
erikj@445:        DEP_MSG="Redundant duplicate dependencies added"
erikj@445:        RES=1
erikj@445:     else
erikj@445:        DEP_MSG="DIFFERENT dependencies"
erikj@445:        RES=1
erikj@445:     fi
erikj@445: fi
erikj@445: 
ohair@425: if [ -n "$DIFFS" ]; then
ohair@425:    if [ $OLD_SIZE -ne $NEW_SIZE ]
ohair@425:    then
erikj@445:        echo Differences, content AND size     : $DEP_MSG : $OLD_NAME 
ohair@425:        RESULT=4
ohair@425:    else
erikj@445:        echo Differences, content BUT SAME size: $DEP_MSG : $OLD_NAME 
ohair@425:        RESULT=3
ohair@425:    fi
ohair@425:    if [ "x$VIEW" == "xview" ]; then
ohair@425:        LANG=C $DIFF $OLD_SYMBOLS $NEW_SYMBOLS
ohair@425:    fi
ohair@425: else
ohair@425:    if [ $OLD_SIZE -ne $NEW_SIZE ]
ohair@425:    then
erikj@445:        echo Identical symbols BUT NEW size    : $DEP_MSG : $OLD_NAME 
ohair@425:        RESULT=2
ohair@425:    else
erikj@445:        echo Identical symbols AND size, BUT not bytewise identical: $DEP_MSG : $OLD_NAME 
ohair@425:        RESULT=1
ohair@425:    fi
ohair@425: fi
ohair@425: 
ohair@425: exit $RESULT
ohair@425: 
ohair@425: 
ohair@425: