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