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#!/usr/bin/env perl
#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
#
# This script is aimed to help scan for and detect globally declared functions
# that are not used from other source files.
#
# Use it like this:
#
# $ ./scripts/singleuse.pl lib/.libs/libcurl.a
#
# Be aware that it might cause false positives due to various build options.
#
my $file = $ARGV[0];
my %wl = (
'Curl_none_cert_status_request' => 'multiple TLS backends',
'Curl_none_check_cxn' => 'multiple TLS backends',
'Curl_none_cleanup' => 'multiple TLS backends',
'Curl_none_close_all' => 'multiple TLS backends',
'Curl_none_data_pending' => 'multiple TLS backends',
'Curl_none_engines_list' => 'multiple TLS backends',
'Curl_none_init' => 'multiple TLS backends',
'Curl_none_md5sum' => 'multiple TLS backends',
'Curl_none_random' => 'multiple TLS backends',
'Curl_none_session_free' => 'multiple TLS backends',
'Curl_none_set_engine' => 'multiple TLS backends',
'Curl_none_set_engine_default' => 'multiple TLS backends',
'Curl_none_shutdown' => 'multiple TLS backends',
'Curl_multi_dump' => 'debug build only',
'Curl_parse_port' => 'UNITTEST',
'Curl_shuffle_addr' => 'UNITTEST',
'de_cleanup' => 'UNITTEST',
'doh_decode' => 'UNITTEST',
'doh_encode' => 'UNITTEST',
'Curl_auth_digest_get_pair' => 'by digest_sspi',
'curlx_uztoso' => 'cmdline tool use',
'curlx_uztoul' => 'by krb5_sspi',
'curlx_uitous' => 'by schannel',
'Curl_islower' => 'by curl_fnmatch',
'getaddressinfo' => 'UNITTEST',
);
my %api = (
'curl_easy_cleanup' => 'API',
'curl_easy_duphandle' => 'API',
'curl_easy_escape' => 'API',
'curl_easy_getinfo' => 'API',
'curl_easy_init' => 'API',
'curl_easy_pause' => 'API',
'curl_easy_perform' => 'API',
'curl_easy_recv' => 'API',
'curl_easy_reset' => 'API',
'curl_easy_send' => 'API',
'curl_easy_setopt' => 'API',
'curl_easy_strerror' => 'API',
'curl_easy_unescape' => 'API',
'curl_easy_upkeep' => 'API',
'curl_easy_option_by_id' => 'API',
'curl_easy_option_by_name' => 'API',
'curl_easy_option_next' => 'API',
'curl_escape' => 'API',
'curl_formadd' => 'API',
'curl_formfree' => 'API',
'curl_formget' => 'API',
'curl_free' => 'API',
'curl_getdate' => 'API',
'curl_getenv' => 'API',
'curl_global_cleanup' => 'API',
'curl_global_init' => 'API',
'curl_global_init_mem' => 'API',
'curl_global_sslset' => 'API',
'curl_maprintf' => 'API',
'curl_mfprintf' => 'API',
'curl_mime_addpart' => 'API',
'curl_mime_data' => 'API',
'curl_mime_data_cb' => 'API',
'curl_mime_encoder' => 'API',
'curl_mime_filedata' => 'API',
'curl_mime_filename' => 'API',
'curl_mime_free' => 'API',
'curl_mime_headers' => 'API',
'curl_mime_init' => 'API',
'curl_mime_name' => 'API',
'curl_mime_subparts' => 'API',
'curl_mime_type' => 'API',
'curl_mprintf' => 'API',
'curl_msnprintf' => 'API',
'curl_msprintf' => 'API',
'curl_multi_add_handle' => 'API',
'curl_multi_assign' => 'API',
'curl_multi_cleanup' => 'API',
'curl_multi_fdset' => 'API',
'curl_multi_info_read' => 'API',
'curl_multi_init' => 'API',
'curl_multi_perform' => 'API',
'curl_multi_remove_handle' => 'API',
'curl_multi_setopt' => 'API',
'curl_multi_socket' => 'API',
'curl_multi_socket_action' => 'API',
'curl_multi_socket_all' => 'API',
'curl_multi_poll' => 'API',
'curl_multi_strerror' => 'API',
'curl_multi_timeout' => 'API',
'curl_multi_wait' => 'API',
'curl_multi_wakeup' => 'API',
'curl_mvaprintf' => 'API',
'curl_mvfprintf' => 'API',
'curl_mvprintf' => 'API',
'curl_mvsnprintf' => 'API',
'curl_mvsprintf' => 'API',
'curl_pushheader_byname' => 'API',
'curl_pushheader_bynum' => 'API',
'curl_share_cleanup' => 'API',
'curl_share_init' => 'API',
'curl_share_setopt' => 'API',
'curl_share_strerror' => 'API',
'curl_slist_append' => 'API',
'curl_slist_free_all' => 'API',
'curl_strequal' => 'API',
'curl_strnequal' => 'API',
'curl_unescape' => 'API',
'curl_url' => 'API',
'curl_url_cleanup' => 'API',
'curl_url_dup' => 'API',
'curl_url_get' => 'API',
'curl_url_set' => 'API',
'curl_url_strerror' => 'API',
'curl_version' => 'API',
'curl_version_info' => 'API',
# the following functions are provided globally in debug builds
'curl_easy_perform_ev' => 'debug-build',
);
open(N, "nm $file|") ||
die;
my %exist;
my %uses;
my $file;
while (<N>) {
my $l = $_;
chomp $l;
if($l =~ /^([0-9a-z_-]+)\.o:/) {
$file = $1;
}
if($l =~ /^([0-9a-f]+) T (.*)/) {
my ($name)=($2);
#print "Define $name in $file\n";
$file =~ s/^libcurl_la-//;
$exist{$name} = $file;
}
elsif($l =~ /^ U (.*)/) {
my ($name)=($1);
#print "Uses $name in $file\n";
$uses{$name} .= "$file, ";
}
}
close(N);
my $err;
for(sort keys %exist) {
#printf "%s is defined in %s, used by: %s\n", $_, $exist{$_}, $uses{$_};
if(!$uses{$_}) {
# this is a symbol with no "global" user
if($_ =~ /^curl_dbg_/) {
# we ignore the memdebug symbols
}
elsif($_ =~ /^curl_/) {
if(!$api{$_}) {
# not present in the API, or for debug-builds
print STDERR "Bad curl-prefix: $_\n";
$err++;
}
}
elsif($wl{$_}) {
#print "$_ is WL\n";
}
else {
printf "%s is defined in %s, but not used outside\n", $_, $exist{$_};
$err++;
}
}
elsif($_ =~ /^curl_/) {
# global prefix, make sure it is "blessed"
if(!$api{$_}) {
# not present in the API, or for debug-builds
if($_ !~ /^curl_dbg_/) {
# ignore the memdebug symbols
print STDERR "Bad curl-prefix $_\n";
$err++;
}
}
}
}
exit $err;
|
