scripts/analyze-inclusions

   1 #! /bin/sh
   2 #
   3 # Copyright (C) 2016 Red Hat, Inc.
   4 #
   5 # Author: Paolo Bonzini <pbonzini@redhat.com>
   6 #
   7 # Print statistics about header file inclusions.
   8 #
   9 # The script has two modes of execution:
  10 #
  11 # 1) if invoked with a path on the command line (possibly
  12 # preceded by a "--" argument), it will run the analysis on
  13 # an existing build directory
  14 #
  15 # 2) otherwise, it will configure and builds QEMU itself in a
  16 # "+build" subdirectory which is left around when the script
  17 # exits.  In this case the command line is passed directly to
  18 # "make" (typically used for a "-j" argument suitable for your
  19 # system).
  20 #
  21 # Inspired by a post by Markus Armbruster.
  22
  23 case "x$1" in
  24 x--)
  25   shift
  26   cd "$1" || exit $?
  27   ;;
  28 x-* | x)
  29   mkdir -p +build
  30   cd +build
  31   test -f Makefile && make distclean
  32   ../configure
  33   make "$@"
  34   ;;
  35 *)
  36   cd "$1" || exit $?
  37 esac
  38
  39 QEMU_CFLAGS=$(sed -n s/^QEMU_CFLAGS=//p config-host.mak)
  40 QEMU_INCLUDES=$(sed -n s/^QEMU_INCLUDES=//p config-host.mak | \
  41     sed 's/$(SRC_PATH)/../g' )
  42 CFLAGS=$(sed -n s/^CFLAGS=//p config-host.mak)
  43
  44 grep_include() {
  45   find . -name "*.d" -exec grep -l "$@" {} + | wc -l
  46 }
  47
  48 echo Found $(find . -name "*.d" | wc -l) object files
  49 echo $(grep_include -F 'hw/hw.h') files include hw/hw.h
  50 echo $(grep_include 'target/[a-z0-9]*/cpu\.h') files include cpu.h
  51 echo $(grep_include -F 'qapi-types.h') files include qapi-types.h
  52 echo $(grep_include -F 'trace/generated-tracers.h') files include generated-tracers.h
  53 echo $(grep_include -F 'qapi/error.h') files include qapi/error.h
  54 echo $(grep_include -F 'qom/object.h') files include qom/object.h
  55 echo $(grep_include -F 'block/aio.h') files include block/aio.h
  56 echo $(grep_include -F 'exec/memory.h') files include exec/memory.h
  57 echo $(grep_include -F 'fpu/softfloat.h') files include fpu/softfloat.h
  58 echo $(grep_include -F 'qemu/bswap.h') files include qemu/bswap.h
  59 echo
  60
  61 awk1='
  62     /^# / { file = $3;next }
  63     NR>1 { bytes[file]+=length()+1; lines[file]++ }
  64     END { for(i in lines) print i,lines[i],bytes[i] }'
  65
  66 awk2='
  67     {tot_l+=$2;tot_b+=$3;tot_f++}
  68     /\/usr.*\/glib/ {glib_l+=$2;glib_b+=$3;glib_f++;next}
  69     /\/usr/ {sys_l+=$2;sys_b+=$3;sys_f++;next}
  70     {qemu_l+=$2;qemu_b+=$3;qemu_f++;next}
  71     END {
  72       printf "%s\t %s\t %s\t %s\n", "lines", "bytes", "files", "source"
  73       printf "%s\t %s\t %s\t %s\n", qemu_l, qemu_b, qemu_f, "QEMU"
  74       printf "%s\t %s\t %s\t %s\n", sys_l, sys_b, sys_f, "system"
  75       printf "%s\t %s\t %s\t %s\n", glib_l, glib_b, glib_f, "glib"
  76       printf "%s\t %s\t %s\t %s\n", tot_l, tot_b, tot_f, "total"
  77     }'
  78
  79 analyze() {
  80   cc $QEMU_CFLAGS $QEMU_INCLUDES $CFLAGS  -E -o - "$@" | \
  81     awk "$awk1" | awk "$awk2"
  82   echo
  83 }
  84
  85 echo osdep.h:
  86 analyze ../include/qemu/osdep.h
  87
  88 echo hw/hw.h:
  89 analyze -include ../include/qemu/osdep.h ../include/hw/hw.h
  90
  91 echo trace/generated-tracers.h:
  92 analyze -include ../include/qemu/osdep.h trace/generated-tracers.h
  93
  94 echo target/i386/cpu.h:
  95 analyze -DNEED_CPU_H -I../target/i386 -Ii386-softmmu -include ../include/qemu/osdep.h ../target/i386/cpu.h
  96
  97 echo hw/hw.h + NEED_CPU_H:
  98 analyze -DNEED_CPU_H -I../target/i386 -Ii386-softmmu -include ../include/qemu/osdep.h ../include/hw/hw.h