contrib/warn_summary

   1 #!/bin/sh
   2 #
   3 # This script parses the output of a gcc bootstrap when using warning
   4 # flags and determines various statistics.
   5 #
   6 # usage: warn_summary [-llf] [-s stage] [-nosub|-ch|-cp|-f|-java|-ada|-intl|-fixinc]
   7 #       [-pass|-wpass] [file(s)]
   8 #
   9 # -llf
  10 # Filter out long lines from the bootstrap output before any other
  11 # action.  This is useful for systems with broken awks/greps which choke
  12 # on long lines.  It is not done by default as it sometimes slows things
  13 # down.
  14 #
  15 # -s number
  16 # Take warnings from stage "Number".  Stage 0 means show warnings from
  17 # before and after the gcc bootstrap directory.  E.g. libraries, etc.
  18 # This presupposes using "gcc -W*" for the stage1 compiler.
  19 #
  20 # -nosub
  21 # Only show warnings from the gcc top level directory.
  22 # -ch|-cp|-f|-java|-ada|-intl|-fixinc
  23 # Only show warnings from the specified language subdirectory.
  24 # These override each other so only the last one passed takes effect.
  25 #
  26 # -pass
  27 # Pass through the bootstrap output after filtering stage and subdir
  28 # (useful for manual inspection.)  This is all lines, not just warnings.
  29 # -wpass
  30 # Pass through only warnings from the bootstrap output after filtering
  31 # stage and subdir.
  32 #
  33 # By Kaveh Ghazi  (ghazi@caip.rutgers.edu)  12/13/97.
  34
  35
  36 # Some awks choke on long lines, sed seems to do a better job.
  37 # Truncate lines > 255 characters.  RE '.\{255,\}' doesn't seem to work. :-(
  38 # Only do this if -llf was specified, because it can really slow things down.
  39 longLineFilter()
  40 {
  41   if test -z "$llf" ; then
  42     cat
  43   else
  44     sed 's/^\(...............................................................................................................................................................................................................................................................\).*/\1/'
  45   fi
  46 }
  47
  48 # This function does one of three things.  It either passes through
  49 # all warning data, or passes through gcc toplevel warnings, or passes
  50 # through a particular subdirectory set of warnings.
  51 subdirectoryFilter()
  52 {
  53   longLineFilter | (
  54   if test -z "$filter" ; then
  55     # Pass through all lines.
  56     cat
  57   else
  58     if test "$filter" = nosub ; then
  59       # Omit all subdirectories.
  60       egrep -v '/gcc/(ch|cp|f|java|intl|fixinc)/'
  61     else
  62       # Pass through only subdir $filter.
  63       grep "/gcc/$filter/"
  64     fi
  65   fi )
  66 }
  67
  68 # This function displays all lines from stageN of the bootstrap.  If
  69 # stage==0, then show lines prior to stage1 and lines from after the last
  70 # stage.  I.e. utilities, libraries, etc.
  71 stageNfilter()
  72 {
  73   if test "$stageN" -lt 1 ; then
  74     # stage "0" means check everything *but* gcc.
  75     $AWK "BEGIN{t=1} ; /^Bootstrapping the compiler/{t=0} ; /^Building runtime libraries/{t=1} ; {if(t==1)print}"
  76   else
  77     if test "$stageN" -eq 1 ; then
  78       $AWK "/^Bootstrapping the compiler|^Building the C and C\+\+ compiler/{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
  79     else
  80       stageNminus1=`expr $stageN - 1`
  81       $AWK "/stage${stageNminus1}\//{t=1} ; /stage$stageN/{t=0} ; {if(t==1)print}"
  82     fi
  83   fi
  84 }
  85
  86 # This function displays lines containing warnings.
  87 warningFilter()
  88 {
  89   grep ' warning: '
  90 }
  91
  92 # This function replaces `xxx' with `???', where xxx is usually some
  93 # variable or function name.  This allows similar warnings to be
  94 # counted together when summarizing.  However it avoids replacing
  95 # certain C keywords which are known appear in various messages.
  96
  97 keywordFilter() {
  98   sed 's/.*warning: //;
  99         s/`\(int\)'"'"'/"\1"/g;
 100         s/`\(long\)'"'"'/"\1"/g;
 101         s/`\(char\)'"'"'/"\1"/g;
 102         s/`\(inline\)'"'"'/"\1"/g;
 103         s/`\(else\)'"'"'/"\1"/g;
 104         s/`\(return\)'"'"'/"\1"/g;
 105         s/`\(static\)'"'"'/"\1"/g;
 106         s/`\(extern\)'"'"'/"\1"/g;
 107         s/`\(const\)'"'"'/"\1"/g;
 108         s/`\(noreturn\)'"'"'/"\1"/g;
 109         s/`\(longjmp\)'"'"' or `\(vfork\)'"'"'/"\1" or "\2"/g;
 110         s/`'"[^']*'/"'`???'"'/g;"'
 111         s/.*format, .* arg (arg [0-9][0-9]*)/??? format, ??? arg (arg ???)/;
 112         s/\([( ]\)arg [0-9][0-9]*\([) ]\)/\1arg ???\2/;
 113         s/"\([^"]*\)"/`\1'"'"'/g'
 114 }
 115
 116 # This function strips out relative pathnames for source files printed
 117 # by the warningFilter function.  This is done so that as the snapshot
 118 # directory name changes every week, the output of this program can be
 119 # compared to previous runs without spurious diffs caused by source
 120 # directory name changes.
 121
 122 srcdirFilter()
 123 {
 124   sed '
 125 s%^[^ ]*/\(gcc/\)%\1%;
 126 s%^[^ ]*/\(include/\)%\1%;
 127 s%^[^ ]*/\(texinfo/\)%\1%;
 128 s%^[^ ]*/\(fastjar/\)%\1%;
 129 s%^[^ ]*/\(zlib/\)%\1%;
 130 s%^[^ ]*/\(lib[a-z23+-]*/\)%\1%;'
 131 }
 132
 133 # Start the main section.
 134
 135 usage="usage: `basename $0` [-llf] [-s stage] [-nosub|-ch|-cp|-f|-java|-ada|-intl|-fixinc] [-pass|-wpass] [file(s)]"
 136 stageN=3
 137 tmpfile=/tmp/tmp-warn.$$
 138
 139 # Remove $tmpfile on exit and various signals.
 140 trap "rm -f $tmpfile" 0
 141 trap "rm -f $tmpfile ; exit 1" 1 2 3 5 9 13 15
 142
 143 # Find a good awk.
 144 if test -z "$AWK" ; then
 145   for AWK in gawk nawk awk ; do
 146     if type $AWK 2>&1 | grep 'not found' > /dev/null 2>&1 ; then
 147       :
 148     else
 149       break
 150     fi
 151   done
 152 fi
 153
 154 # Parse command line arguments.
 155 while test -n "$1" ; do
 156  case "$1" in
 157    -llf) llf=1 ; shift ;;
 158    -s)  if test -z "$2"; then echo $usage 1>&2; exit 1; fi
 159         stageN="$2"; shift 2 ;;
 160    -s*) stageN="`expr $1 : '-s\(.*\)'`" ; shift ;;
 161    -nosub|-ch|-cp|-f|-java|-ada|-intl|-fixinc) filter="`expr $1 : '-\(.*\)'`" ; shift ;;
 162    -pass) pass=1 ; shift ;;
 163    -wpass) pass=w ; shift ;;
 164    -*)  echo $usage 1>&2 ; exit 1 ;;
 165    *)   break ;;
 166  esac
 167 done
 168
 169 # Check for a valid value of $stageN.
 170 case "$stageN" in
 171   [0-9]) ;;
 172   *) echo "Stage <$stageN> must be in the range [0..9]." 1>&2 ; exit 1 ;;
 173 esac
 174
 175 for file in "$@" ; do
 176
 177   stageNfilter < $file | subdirectoryFilter > $tmpfile
 178
 179   # (Just) show me the warnings.
 180   if test "$pass" != '' ; then
 181     if test "$pass" = w ; then
 182       warningFilter < $tmpfile
 183     else
 184       cat $tmpfile
 185     fi
 186     continue
 187   fi
 188
 189   if test -z "$filter" ; then
 190     echo "Counting all warnings,"
 191   else
 192     if test "$filter" = nosub ; then
 193       echo "Counting non-subdirectory warnings,"
 194     else
 195       echo "Counting warnings in the gcc/$filter subdirectory,"
 196     fi
 197   fi
 198   count=`warningFilter < $tmpfile | wc -l`
 199   echo there are $count warnings in stage$stageN of this bootstrap.
 200
 201   echo
 202   echo Number of warnings per file:
 203   warningFilter < $tmpfile | srcdirFilter | $AWK -F: '{print$1}' | sort | \
 204     uniq -c | sort -nr
 205
 206   echo
 207   echo Number of warning types:
 208   warningFilter < $tmpfile | keywordFilter | sort | uniq -c | sort -nr
 209
 210 done