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jeremybenn |
#!/bin/sh
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#
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# This script parses the output of a gcc bootstrap when using warning
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# flags and determines various statistics.
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#
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# usage: warn_summary [-llf] [-s stage] [-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc]
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# [-pass|-wpass] [file(s)]
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#
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# -llf
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# Filter out long lines from the bootstrap output before any other
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# action. This is useful for systems with broken awks/greps which choke
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# on long lines. It is not done by default as it sometimes slows things
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# down.
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#
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# -s number
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# Take warnings from stage "Number". Stage 0 means show warnings from
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# before and after the gcc bootstrap directory. E.g. libraries, etc.
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# This presupposes using "gcc -W*" for the stage1 compiler.
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#
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# -nosub
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# Only show warnings from the gcc top level directory.
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# -ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc
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# Only show warnings from the specified gcc subdirectory.
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# These override each other so only the last one passed takes effect.
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#
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# -pass
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# Pass through the bootstrap output after filtering stage and subdir
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# (useful for manual inspection.) This is all lines, not just warnings.
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# -wpass
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# Pass through only warnings from the bootstrap output after filtering
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# stage and subdir.
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#
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# By Kaveh Ghazi (ghazi@caip.rutgers.edu) 12/13/97.
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# Some awks choke on long lines, sed seems to do a better job.
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# Truncate lines > 255 characters. RE '.\{255,\}' doesn't seem to work. :-(
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# Only do this if -llf was specified, because it can really slow things down.
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longLineFilter()
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{
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if test -z "$llf" ; then
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cat
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else
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sed 's/^\(...............................................................................................................................................................................................................................................................\).*/\1/'
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fi
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}
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# This function does one of three things. It either passes through
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# all warning data, or passes through gcc toplevel warnings, or passes
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# through a particular subdirectory set of warnings.
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subdirectoryFilter()
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{
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longLineFilter | (
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if test -z "$filter" ; then
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# Pass through all lines.
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cat
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else
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if test "$filter" = nosub ; then
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# Omit all subdirectories.
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egrep -v '/gcc/(ch|cp|f|fortran|java|ada|intl|fixinc)/'
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else
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# Pass through only subdir $filter.
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grep "/gcc/$filter/"
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fi
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fi )
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}
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# This function displays all lines from stageN of the bootstrap. If
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# stage==0, then show lines prior to stage1 and lines from after the last
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# stage. I.e. utilities, libraries, etc.
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stageNfilter()
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{
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if test "$stageN" -lt 1 ; then
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# stage "0" means check everything *but* gcc.
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$AWK "BEGIN{t=1} ; /^Bootstrapping the compiler/{t=0} ; /^Building runtime libraries/{t=1} ; {if(t==1)print}"
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else
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if test "$stageN" -eq 1 ; then
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$AWK "/^Bootstrapping the compiler|^Building the C and C\+\+ compiler/{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
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else
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stageNminus1=`expr $stageN - 1`
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$AWK "/stage${stageNminus1}\//{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
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fi
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fi
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}
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# This function displays lines containing warnings.
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warningFilter()
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{
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grep ' warning: '
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}
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# This function replaces `xxx' with `???', where xxx is usually some
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# variable or function name. This allows similar warnings to be
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# counted together when summarizing. However it avoids replacing
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# certain C keywords which are known appear in various messages.
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keywordFilter() {
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sed 's/.*warning: //;
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s/`\(int\)'"'"'/"\1"/g;
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s/`\(long\)'"'"'/"\1"/g;
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s/`\(char\)'"'"'/"\1"/g;
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s/`\(inline\)'"'"'/"\1"/g;
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s/`\(else\)'"'"'/"\1"/g;
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s/`\(return\)'"'"'/"\1"/g;
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s/`\(static\)'"'"'/"\1"/g;
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s/`\(extern\)'"'"'/"\1"/g;
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s/`\(const\)'"'"'/"\1"/g;
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s/`\(noreturn\)'"'"'/"\1"/g;
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s/`\(longjmp\)'"'"' or `\(vfork\)'"'"'/"\1" or "\2"/g;
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s/'"[\`'][^']*'/"'"???"/g;
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s/.*format, .* arg (arg [0-9][0-9]*)/??? format, ??? arg (arg ???)/;
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s/\([( ]\)arg [0-9][0-9]*\([) ]\)/\1arg ???\2/;
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s/"\([^"]*\)"/`\1'"'"'/g'
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}
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# This function strips out relative pathnames for source files printed
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# by the warningFilter function. This is done so that as the snapshot
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# directory name changes every week, the output of this program can be
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# compared to previous runs without spurious diffs caused by source
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# directory name changes.
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srcdirFilter()
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{
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sed '
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s%^[^ ]*/\(gcc/\)%\1%;
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s%^[^ ]*/\(include/\)%\1%;
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s%^[^ ]*/\(texinfo/\)%\1%;
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s%^[^ ]*/\(fastjar/\)%\1%;
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s%^[^ ]*/\(zlib/\)%\1%;
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s%^[^ ]*/\(fixincludes/\)%\1%;
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s%^[^ ]*/\(sim/\)%\1%;
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s%^[^ ]*/\(newlib/\)%\1%;
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s%^[^ ]*/\(mpfr/\)%\1%;
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s%^[^ ]*/\(lib[a-z23+-]*/\)%\1%;'
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}
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# Start the main section.
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usage="usage: `basename $0` [-llf] [-s stage] [-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc] [-pass|-wpass] [file(s)]"
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stageN=3
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tmpfile=/tmp/tmp-warn.$$
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# Remove $tmpfile on exit and various signals.
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trap "rm -f $tmpfile" 0
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trap "rm -f $tmpfile ; exit 1" 1 2 3 5 9 13 15
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# Find a good awk.
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if test -z "$AWK" ; then
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for AWK in gawk nawk awk ; do
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if type $AWK 2>&1 | grep 'not found' > /dev/null 2>&1 ; then
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:
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else
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break
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fi
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done
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fi
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# Parse command line arguments.
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while test -n "$1" ; do
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case "$1" in
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-llf) llf=1 ; shift ;;
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-s) if test -z "$2"; then echo $usage 1>&2; exit 1; fi
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stageN="$2"; shift 2 ;;
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-s*) stageN="`expr $1 : '-s\(.*\)'`" ; shift ;;
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-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc) filter="`expr $1 : '-\(.*\)'`" ; shift ;;
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-pass) pass=1 ; shift ;;
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-wpass) pass=w ; shift ;;
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-*) echo $usage 1>&2 ; exit 1 ;;
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*) break ;;
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esac
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done
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# Check for a valid value of $stageN.
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case "$stageN" in
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[0-9]) ;;
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*) echo "Stage <$stageN> must be in the range [0..9]." 1>&2 ; exit 1 ;;
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esac
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for file in "$@" ; do
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stageNfilter < $file | subdirectoryFilter > $tmpfile
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# (Just) show me the warnings.
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if test "$pass" != '' ; then
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if test "$pass" = w ; then
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warningFilter < $tmpfile
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else
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cat $tmpfile
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fi
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continue
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fi
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if test -z "$filter" ; then
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echo "Counting all warnings,"
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else
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if test "$filter" = nosub ; then
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echo "Counting non-subdirectory warnings,"
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else
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echo "Counting warnings in the gcc/$filter subdirectory,"
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fi
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fi
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count=`warningFilter < $tmpfile | wc -l`
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echo there are $count warnings in stage$stageN of this bootstrap.
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echo
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echo Number of warnings per file:
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warningFilter < $tmpfile | srcdirFilter | $AWK -F: '{print$1}' | sort | \
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uniq -c | sort -nr
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echo
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echo Number of warning types:
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warningFilter < $tmpfile | keywordFilter | sort | uniq -c | sort -nr
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done
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