Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: nwellnhof/comp…
Fetching contributors…

Cannot retrieve contributors at this time

executable file 649 lines (590 sloc) 15.194 kb
#! perl
################################################################################
# Copyright (C) 2001-2003, Parrot Foundation.
################################################################################
=head1 NAME
tools/dev/lib_deps.pl - List libc dependencies
=head1 SYNOPSIS
% perl tools/dev/lib_deps.pl [object | source] file1 [file2 ...]
=head1 DESCRIPTION
This script is intended to give us an idea of what C<libc> functions
this build depends upon.
=head2 Options
=over 4
=item C<object>
In C<object> mode, it expects a list of all parrot's object files. It
runs C<nm> on each and determines what external functions are being
called. Note that it assumes a gnu-ish C<nm>.
=item C<source>
In C<source> mode, it uses a the C<cxref> program
(L<http://www.gedanken.demon.co.uk/cxref/>) to extract information from
the program source about what functions are being called, what includes
are used, etc. This mode is potentially more thorough, but a bit more
magical and therefore less conclusive.
=back
=cut
################################################################################
use strict;
use warnings;
use File::Find;
use File::Spec;
my %defined_in;
my %referenced_in;
my %ansi_c89_symbol;
my %ansi_c89_header;
my ( $mode, @files ) = @ARGV;
if ( $mode !~ /^(source|object)$/ || !@files ) {
die "Usage: $0 object <object files..>\n" . " $0 source <source files..>\n";
}
while (<DATA>) {
next if /^\s*#/;
chomp;
my ( $symbol, $file ) = /(\S+)\s+(\S+)/;
$ansi_c89_symbol{$symbol} = $file unless ( $symbol eq "UNDEF" );
push @{ $ansi_c89_header{$file} }, $symbol;
}
if ( $mode eq "object" ) {
do_object();
}
else {
do_source();
}
exit(0);
##############################################################################
sub do_source {
if ( $files[0] eq "all_source" ) {
# do a little "find" action for now.
@files = ();
File::Find::find(
{
wanted => sub {
/^.*\.[ch]\z/s
&& push @files, $File::Find::name;
}
},
'.'
);
}
# note: need to run this a second time so the database is built.
# should just use the build process to do it the first time.
my $devnull = File::Spec->devnull;
my $cmd = "cxref -raw -Iinclude -xref @files";
print "Running cxref (pass 1)\n";
system("$cmd > $devnull 2>$devnull");
print "Running cxref (pass 2)\n";
open( my $F, '<', "$cmd 2>$devnull|" )
|| die "Can't run $cmd.\n";
my %external_calls;
my %internal_calls;
my %variable_visible;
my %system_include;
my ( $file, $function, $variable );
while (<$F>) {
if (/----------------------------------------/) {
undef $file if defined($file);
next;
}
if (/^INCLUDES : '(.*)' \[System file\]/) {
next if ( $1 =~ /^include\// );
$system_include{$1}{$file}++;
next;
}
if ( !$file && /^FILE : '(.*)'$/ ) {
$file = $1;
next;
}
# skip anything between files.
next unless $file;
# beginning of function block
if (/FUNCTION : (.*) \[(.*)\]/) {
$function = $1;
my $function_scope = $2;
next;
}
# end of function block
if ( $function && /^\s*$/ ) {
undef $function;
next;
}
# beginning of variable block
if (/VARIABLE : (.*) \[(.*)\]/) {
$variable = $1;
my $variable_scope = $2;
if ( $variable_scope eq "Local" ) {
$variable_visible{$file}{$1}++;
}
else {
$variable_visible{"ALL"}{$1}++;
}
next;
}
# end of variable block
if ( $variable && /^\s*$/ ) {
undef $variable;
next;
}
if ($function) {
if (/Calls (.*) : (.*)/) {
# calling another function within parrot.
$internal_calls{$1}{"$file:$function"}++
unless ( $variable_visible{$file}{$1}
|| $variable_visible{ALL}{$1} );
}
elsif (/Calls (.*)/) {
# calling a function outside of parrot!
$external_calls{$1}{"$file:$function"}++
unless ( $variable_visible{$file}{$1}
|| $variable_visible{ALL}{$1} );
}
}
}
close($F);
# filter out things that start with _. Probably internal libc stuff.
my @external_calls = grep { !/^_/ } sort keys %external_calls;
my @internal_calls = grep { !/^_/ } sort keys %internal_calls;
my @non_ansi_external_calls = grep { !exists( $ansi_c89_symbol{$_} ) } @external_calls;
printf(
"Found %d functions which are defined and called within the %d supplied source files.\n",
scalar(@internal_calls), scalar(@files) );
printf( "Found %d external functions which were called.\n", scalar(@external_calls) );
printf( "Of these, %d are not defined by ANSI C89:\n", scalar(@non_ansi_external_calls) );
foreach (@non_ansi_external_calls) {
print " $_:\n";
foreach ( sort keys %{ $external_calls{$_} } ) {
print " $_\n";
}
}
print "\nThe following non-ansi system includes are used:\n";
foreach my $include ( sort keys %system_include ) {
if ( !exists( $ansi_c89_header{$include} ) ) {
print " $include, included by:\n";
foreach my $file ( sort keys %{ $system_include{$include} } ) {
print " $file\n";
}
}
}
}
sub do_object {
foreach my $obj (@files) {
open( my $F, '<', "nm -a $obj|" ) || die "Can't run nm on $obj\n";
while (<$F>) {
chomp;
my ( $type, $symbol ) = /^........ (\S) (.*)/;
if ( $type eq 'U' ) {
$defined_in{$symbol} ||= undef;
push @{ $referenced_in{$symbol} }, $obj;
}
else {
$defined_in{$symbol} .= "$obj ";
}
}
close($F);
}
# omit symbols which begin with _. These are likely to be internal
# variables used by libc macros.
my @symbols = grep { !/^_/ } sort keys %defined_in;
my @external_symbols = sort grep { !defined( $defined_in{$_} ) } @symbols;
my @internal_symbols = sort grep { defined( $defined_in{$_} ) } @symbols;
my @non_ansi_external_symbols = grep { !exists( $ansi_c89_symbol{$_} ) } @external_symbols;
printf(
"Found %d symbols defined within the %d supplied object files.\n",
scalar(@internal_symbols),
scalar(@files)
);
printf( "Found %d external symbols\n", scalar(@external_symbols) );
printf( "Of these, %d are not defined by ANSI C89:\n", scalar(@non_ansi_external_symbols) );
print " $_ (in " . ( join ',', @{ $referenced_in{$_} } ) . ")\n"
foreach (@non_ansi_external_symbols);
}
__END__
# The following symbols are available in a C89 Hosted Implementation
# (not sure if I got this right- it came from a C99 reference, so some 99isms
# might have slipped in)
abort stdlib.h
abs stdlib.h
acos math.h
acosf math.h
acosh math.h
acoshf math.h
acoshl math.h
acosl math.h
arg complex.h
asctime time.h
asin math.h
asinf math.h
asinh math.h
asinhf math.h
asinhl math.h
asinl math.h
atan math.h
atan2 math.h
atan2f math.h
atan2l math.h
atanf math.h
atanh math.h
atanhf math.h
atanhl math.h
atanl math.h
atexit stdlib.h
atof stdlib.h
atoi stdlib.h
atol stdlib.h
atoll stdlib.h
bsearch stdlib.h
cabs complex.h
cabsf complex.h
cabsl complex.h
cacos complex.h
cacosf complex.h
cacosh complex.h
cacoshf complex.h
cacoshl complex.h
cacosl complex.h
calloc stdlib.h
carg complex.h
cargf complex.h
cargl complex.h
casin complex.h
casinf complex.h
casinh complex.h
casinhf complex.h
casinhl complex.h
casinl complex.h
catan complex.h
catanf complex.h
catanh complex.h
catanhf complex.h
catanhl complex.h
catanl complex.h
cbrt math.h
cbrtf math.h
cbrtl math.h
ccos complex.h
ccosf complex.h
ccosh complex.h
ccoshf complex.h
ccoshl complex.h
ccosl complex.h
ceil math.h
ceilf math.h
ceill math.h
cexp complex.h
cexpf complex.h
cexpl complex.h
cimag complex.h
cimagf complex.h
cimagl complex.h
clearerr stdio.h
clock time.h
clog complex.h
clogf complex.h
clogl complex.h
conj complex.h
conjf complex.h
conjl complex.h
copysign math.h
copysignf math.h
copysignl math.h
cos math.h
cosf math.h
cosh math.h
coshf math.h
coshl math.h
cosl math.h
cpow complex.h
cpowf complex.h
cpowl complex.h
cproj complex.h
cprojf complex.h
cprojl complex.h
creal complex.h
crealf complex.h
creall complex.h
csin complex.h
csinf complex.h
csinh complex.h
csinhf complex.h
csinhl complex.h
csinl complex.h
csqrt complex.h
csqrtf complex.h
csqrtl complex.h
ctan complex.h
ctanf complex.h
ctanh complex.h
ctanhf complex.h
ctanhl complex.h
ctanl complex.h
ctime time.h
difftime time.h
div stdlib.h
erf math.h
erfc math.h
erfcf math.h
erfcl math.h
erff math.h
erfl math.h
errno errno.h
exit stdlib.h
exp math.h
exp2 math.h
exp2f math.h
exp2l math.h
expf math.h
expl math.h
expm1 math.h
expm1f math.h
expm1l math.h
fabs math.h
fabsf math.h
fabsl math.h
fclose stdio.h
fdim math.h
fdimf math.h
fdiml math.h
feof stdio.h
ferror stdio.h
fflush stdio.h
fgetc stdio.h
fgetpos stdio.h
fgets stdio.h
floor math.h
floorf math.h
floorl math.h
fma math.h
fmaf math.h
fmal math.h
fmax math.h
fmaxf math.h
fmaxl math.h
fmin math.h
fminf math.h
fminl math.h
fmod math.h
fmodf math.h
fmodl math.h
fopen stdio.h
fpclassify math.h
fprintf stdio.h
fputc stdio.h
fputs stdio.h
fread stdio.h
free stdlib.h
freopen stdio.h
frexp math.h
frexpf math.h
frexpl math.h
fscanf stdio.h
fseek stdio.h
fsetpos stdio.h
ftell stdio.h
fwrite stdio.h
getc stdio.h
getchar stdio.h
getenv stdlib.h
gets stdio.h
gmtime time.h
hypot math.h
hypotf math.h
hypotl math.h
ilogb math.h
ilogbf math.h
ilogbl math.h
imag complex.h
isalnum ctype.h
isalpha ctype.h
isblank ctype.h
iscntrl ctype.h
isdigit ctype.h
isfinite math.h
isgraph ctype.h
isgreater math.h
isgreatereq math.h
isinf math.h
isless math.h
islessequal math.h
islessgreat math.h
islower ctype.h
isnan math.h
isnormal math.h
isprint ctype.h
ispunct ctype.h
isspace ctype.h
isunordered math.h
isupper ctype.h
isxdigit ctype.h
labs stdlib.h
ldexp math.h
ldexpf math.h
ldexpl math.h
ldiv stdlib.h
lgamma math.h
lgammaf math.h
lgammal math.h
llabs stdlib.h
llrint math.h
llrintf math.h
llrintl math.h
llround math.h
llroundf math.h
llroundl math.h
localeconv locale.h
localtime time.h
log math.h
log10 math.h
log10f math.h
log10l math.h
log1p math.h
log1pf math.h
log1pl math.h
log2 math.h
log2f math.h
log2l math.h
logb math.h
logbf math.h
logbl math.h
logf math.h
logl math.h
longjmp setjmp.h
lrint math.h
lrintf math.h
lrintl math.h
lround math.h
lroundf math.h
lroundl math.h
malloc stdlib.h
mblen stdlib.h
mbstowcs stdlib.h
mbtowc stdlib.h
memchr string.h
memcmp string.h
memcpy string.h
memmove string.h
memset string.h
mktime time.h
modf math.h
modff math.h
modfl math.h
nan math.h
nanf math.h
nanl math.h
nearbyint math.h
nearbyintf math.h
nearbyintl math.h
nextafter math.h
nextafterf math.h
nextafterl math.h
nexttoward math.h
nexttowardf math.h
nexttowardl math.h
perror stdio.h
pow math.h
printf stdio.h
putc stdio.h
putchar stdio.h
puts stdio.h
qsort stdlib.h
raise signal.h
rand stdlib.h
real complex.h
realloc stdlib.h
remainder math.h
remainderf math.h
remainderl math.h
remove stdio.h
remquo math.h
remquof math.h
remquol math.h
rename stdio.h
rewind stdio.h
rint math.h
rintf math.h
rintl math.h
round math.h
roundf math.h
roundl math.h
scalbln math.h
scalblnf math.h
scalblnl math.h
scalbn math.h
scalbnf math.h
scalbnl math.h
scanf stdio.h
setbuf stdio.h
setlocale locale.h
setvbuf stdio.h
signal signal.h
signbit math.h
sin math.h
sinf math.h
sinh math.h
sinhf math.h
sinhl math.h
sinl math.h
sprintf stdio.h
sqrt math.h
sqrtf math.h
sqrtl math.h
srand stdlib.h
sscanf stdio.h
stderr stdio.h
stdin stdio.h
stdout stdio.h
strcat string.h
strchr string.h
strcmp string.h
strcoll string.h
strcpy string.h
strcspn string.h
strerror string.h
strftime time.h
strlen string.h
strncat string.h
strncmp string.h
strncpy string.h
strpbrk string.h
strrchr string.h
strspn string.h
strstr string.h
strtod stdlib.h
strtof stdlib.h
strtok string.h
strtol stdlib.h
strtold stdlib.h
strtoll stdlib.h
strtoul stdlib.h
strtoull stdlib.h
strxfrm string.h
system stdlib.h
tan math.h
tanf math.h
tanh math.h
tanhf math.h
tanhl math.h
tanl math.h
tgamma math.h
tgammaf math.h
tgammal math.h
time time.h
tmpfile stdio.h
tmpnam stdio.h
tolower ctype.h
toupper ctype.h
trunc math.h
truncf math.h
truncl math.h
ungetc stdio.h
vfprintf stdio.h
vfscanf stdio.h
vprintf stdio.h
vscanf stdio.h
vsprintf stdio.h
vsscanf stdio.h
UNDEF assert.h
UNDEF stdarg.h
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4:
Jump to Line
Something went wrong with that request. Please try again.