xref: /qemu/scripts/analyze-inclusions (revision 7d7a21ba) 
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
23case "x$1" in
24x--)
25  shift
26  cd "$1" || exit $?
27  ;;
28x-* | x)
29  mkdir -p +build
30  cd +build
31  test -f Makefile && make distclean
32  ../configure
33  make "$@"
34  ;;
35*)
36  cd "$1" || exit $?
37esac
38
39QEMU_CFLAGS=$(sed -n s/^QEMU_CFLAGS=//p config-host.mak)
40QEMU_INCLUDES=$(sed -n s/^QEMU_INCLUDES=//p config-host.mak | \
41    sed 's/$(SRC_PATH)/../g' )
42CFLAGS=$(sed -n s/^CFLAGS=//p config-host.mak)
43
44grep_include() {
45  find . -name "*.d" -exec grep -l "$@" {} + | wc -l
46}
47
48echo Found $(find . -name "*.d" | wc -l) object files
49echo $(grep_include -F 'hw/hw.h') files include hw/hw.h
50echo $(grep_include 'target/[a-z0-9]*/cpu\.h') files include cpu.h
51echo $(grep_include -F 'qapi-types.h') files include qapi-types.h
52echo $(grep_include -F 'trace/generated-tracers.h') files include generated-tracers.h
53echo $(grep_include -F 'qapi/error.h') files include qapi/error.h
54echo $(grep_include -F 'qom/object.h') files include qom/object.h
55echo $(grep_include -F 'block/aio.h') files include block/aio.h
56echo $(grep_include -F 'exec/memory.h') files include exec/memory.h
57echo $(grep_include -F 'fpu/softfloat.h') files include fpu/softfloat.h
58echo $(grep_include -F 'qemu/bswap.h') files include qemu/bswap.h
59echo
60
61awk1='
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
66awk2='
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
79analyze() {
80  cc $QEMU_CFLAGS $QEMU_INCLUDES $CFLAGS  -E -o - "$@" | \
81    awk "$awk1" | awk "$awk2"
82  echo
83}
84
85echo osdep.h:
86analyze ../include/qemu/osdep.h
87
88echo hw/hw.h:
89analyze -include ../include/qemu/osdep.h ../include/hw/hw.h
90
91echo trace/generated-tracers.h:
92analyze -include ../include/qemu/osdep.h trace/generated-tracers.h
93
94echo target/i386/cpu.h:
95analyze -DCOMPILING_PER_TARGET -I../target/i386 -Ii386-softmmu -include ../include/qemu/osdep.h ../target/i386/cpu.h
96
97echo hw/hw.h + COMPILING_PER_TARGET:
98analyze -DCOMPILING_PER_TARGET -I../target/i386 -Ii386-softmmu -include ../include/qemu/osdep.h ../include/hw/hw.h
99