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|-fortran|-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|-fortran|-java|-ada|-intl|-fixinc
23# Only show warnings from the specified gcc 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.
39longLineFilter()
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.
51subdirectoryFilter()
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|fortran|java|ada|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.
71stageNfilter()
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.
87warningFilter()
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
97keywordFilter() {
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
122srcdirFilter()
123{
124  sed '
125s%^[^ ]*/\(gcc/\)%\1%;
126s%^[^ ]*/\(include/\)%\1%;
127s%^[^ ]*/\(texinfo/\)%\1%;
128s%^[^ ]*/\(fastjar/\)%\1%;
129s%^[^ ]*/\(zlib/\)%\1%;
130s%^[^ ]*/\(lib[a-z23+-]*/\)%\1%;'
131}
132
133# Start the main section.
134
135usage="usage: `basename $0` [-llf] [-s stage] [-nosub|-ch|-cp|-f|-fortran|-java|-ada|-intl|-fixinc] [-pass|-wpass] [file(s)]"
136stageN=3
137tmpfile=/tmp/tmp-warn.$$
138
139# Remove $tmpfile on exit and various signals.
140trap "rm -f $tmpfile" 0
141trap "rm -f $tmpfile ; exit 1" 1 2 3 5 9 13 15
142
143# Find a good awk.
144if test -z "$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
152fi
153
154# Parse command line arguments.
155while 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|-fortran|-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
167done
168
169# Check for a valid value of $stageN.
170case "$stageN" in
171  [0-9]) ;;
172  *) echo "Stage <$stageN> must be in the range [0..9]." 1>&2 ; exit 1 ;;
173esac
174
175for file in "$@" ; 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
210done
211