smatch_scripts/show_unreachable.sh

   1 #!/bin/bash
   2
   3 context=6
   4 while true ; do
   5     if [ "$1" = "-C" ] ; then
   6         shift
   7         context=$1
   8         shift
   9         continue
  10     fi
  11     if [ "$1" = "-k" ] ; then
  12         shift
  13         mode=kernel
  14         continue
  15     fi
  16     if [ "$1" = "-b" ] ; then
  17         shift
  18         nobreak=yes
  19         continue
  20     fi
  21     break
  22 done
  23
  24
  25 file=$1
  26 if [[ "$file" = "" ]] ; then
  27     echo "Usage:  $0 [-C <lines>] [-b] [-k] <file with smatch messages>"
  28     echo "  -C <lines>:  Print <lines> of context"
  29     echo "  -b        :  Ignore unreachable break statements"
  30     echo "  -k        :  Ignore some kernel defines"
  31     exit 1
  32 fi
  33
  34 grep 'ignoring unreachable' $file | cut -d ' ' -f1 | while read loc; do
  35     code_file=$(echo $loc | cut -d ':' -f 1)
  36     line=$(echo $loc | cut -d ':' -f 2)
  37
  38     if [ "$mode" = "kernel" ] ; then
  39         # BUG() is sometimes defined away on embedded systems
  40         if tail -n +$(($line - 1)) $code_file | head -n 1 | \
  41             egrep -qw '(BUG|BT_STATE_CHANGE)' ; then
  42             continue;
  43         fi
  44         if tail -n +$(($line)) $code_file | head -n 1 | \
  45             egrep -qw '(DLM_ASSERT|BT_SI_SM_RETURN|BT_STATE_CHANGE|PARSE_ERROR1|PARSE_ERROR|CMDINSIZE|PROCESS_SYSTEM_PARAM|RETURN_STATUS|ar9170_regwrite_result)' ; then
  46             continue;
  47         fi
  48     fi
  49
  50     if [ "$nobreak" = "yes" ] ; then
  51         if tail -n +$(($line)) $code_file | head -n 1 | grep -qw 'break' ; then
  52             continue;
  53         fi
  54
  55     fi
  56     echo "========================================================="
  57     echo $code_file:$line
  58     tail -n +$(($line - ($context - 1))) $code_file | head -n $(($context - 1))
  59     echo "---------------------------------------------------------"
  60     tail -n +${line} $code_file | head -n $context
  61 done
  62