buildsys: add initial abi-check
copied from Ubuntu's packaging
This commit is contained in:
Fabian Grünbichler
parent
1b29f8ed34
commit
2f2c243050
210
abi-check
Executable file
210
abi-check
Executable file
@ -0,0 +1,210 @@
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#!/usr/bin/perl -w
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my $flavour = shift;
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my $prev_abinum = shift;
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my $abinum = shift;
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my $prev_abidir = shift;
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my $abidir = shift;
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my $skipabi = shift;
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my $fail_exit = 1;
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my $EE = "EE:";
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my $errors = 0;
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my $abiskip = 0;
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my $count;
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print "II: Checking ABI for $flavour...\n";
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if (-f "$prev_abidir/ignore"
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or -f "$prev_abidir/$flavour.ignore" or "$skipabi" eq "true") {
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print "WW: Explicitly asked to ignore ABI, running in no-fail mode\n";
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$fail_exit = 0;
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$abiskip = 1;
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$EE = "WW:";
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}
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if ($prev_abinum != $abinum) {
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print "II: Different ABI's, running in no-fail mode\n";
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$fail_exit = 0;
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$EE = "WW:";
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}
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if (not -f "$abidir/$flavour" or not -f "$prev_abidir/$flavour") {
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print "EE: Previous or current ABI file missing!\n";
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print " $abidir/$flavour\n" if not -f "$abidir/$flavour";
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print " $prev_abidir/$flavour\n" if not -f "$prev_abidir/$flavour";
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# Exit if the ABI files are missing, but return status based on whether
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# skip ABI was indicated.
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if ("$abiskip" eq "1") {
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exit(0);
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} else {
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exit(1);
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}
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}
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my %symbols;
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my %symbols_ignore;
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my %modules_ignore;
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my %module_syms;
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# See if we have any ignores
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my $ignore = 0;
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print " Reading symbols/modules to ignore...";
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for $file ("$prev_abidir/../blacklist", "$prev_abidir/../../perm-blacklist") {
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if (-f $file) {
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open(IGNORE, "< $file") or
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die "Could not open $file";
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while (<IGNORE>) {
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chomp;
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if ($_ =~ m/M: (.*)/) {
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$modules_ignore{$1} = 1;
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} else {
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$symbols_ignore{$_} = 1;
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}
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$ignore++;
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}
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close(IGNORE);
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}
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}
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print "read $ignore symbols/modules.\n";
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sub is_ignored($$) {
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my ($mod, $sym) = @_;
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die "Missing module name in is_ignored()" if not defined($mod);
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die "Missing symbol name in is_ignored()" if not defined($sym);
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if (defined($symbols_ignore{$sym}) or defined($modules_ignore{$mod})) {
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return 1;
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}
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return 0;
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}
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# Read new syms first
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print " Reading new symbols ($abinum)...";
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$count = 0;
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open(NEW, "< $abidir/$flavour") or
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die "Could not open $abidir/$flavour";
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while (<NEW>) {
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chomp;
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m/^(\S+)\s(.+)\s(0x[0-9a-f]+)\s(.+)$/;
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$symbols{$4}{'type'} = $1;
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$symbols{$4}{'loc'} = $2;
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$symbols{$4}{'hash'} = $3;
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$module_syms{$2} = 0;
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$count++;
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}
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close(NEW);
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print "read $count symbols.\n";
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# Now the old symbols, checking for missing ones
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print " Reading old symbols ($prev_abinum)...";
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$count = 0;
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open(OLD, "< $prev_abidir/$flavour") or
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die "Could not open $prev_abidir/$flavour";
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while (<OLD>) {
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chomp;
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m/^(\S+)\s(.+)\s(0x[0-9a-f]+)\s(.+)$/;
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$symbols{$4}{'old_type'} = $1;
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$symbols{$4}{'old_loc'} = $2;
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$symbols{$4}{'old_hash'} = $3;
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$count++;
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}
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close(OLD);
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print "read $count symbols.\n";
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print "II: Checking for missing symbols in new ABI...";
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$count = 0;
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foreach $sym (keys(%symbols)) {
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if (!defined($symbols{$sym}{'type'})) {
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print "\n" if not $count;
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printf(" MISS : %s%s\n", $sym,
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is_ignored($symbols{$sym}{'old_loc'}, $sym) ? " (ignored)" : "");
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$count++ if !is_ignored($symbols{$sym}{'old_loc'}, $sym);
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}
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}
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print " " if $count;
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print "found $count missing symbols\n";
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if ($count) {
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print "$EE Symbols gone missing (what did you do!?!)\n";
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$errors++;
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}
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print "II: Checking for new symbols in new ABI...";
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$count = 0;
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foreach $sym (keys(%symbols)) {
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if (!defined($symbols{$sym}{'old_type'})) {
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print "\n" if not $count;
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print " NEW : $sym\n";
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$count++;
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}
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}
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print " " if $count;
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print "found $count new symbols\n";
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if ($count and $prev_abinum == $abinum) {
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print "WW: Found new symbols within same ABI. Not recommended\n";
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}
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print "II: Checking for changes to ABI...\n";
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$count = 0;
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my $moved = 0;
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my $changed_type = 0;
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my $changed_hash = 0;
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foreach $sym (keys(%symbols)) {
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if (!defined($symbols{$sym}{'old_type'}) or
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!defined($symbols{$sym}{'type'})) {
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next;
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}
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# Changes in location don't hurt us, but log it anyway
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if ($symbols{$sym}{'loc'} ne $symbols{$sym}{'old_loc'}) {
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printf(" MOVE : %-40s : %s => %s\n", $sym, $symbols{$sym}{'old_loc'},
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$symbols{$sym}{'loc'});
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$moved++;
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}
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# Changes to export type are only bad if new type isn't
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# EXPORT_SYMBOL. Changing things to GPL are bad.
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if ($symbols{$sym}{'type'} ne $symbols{$sym}{'old_type'}) {
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printf(" TYPE : %-40s : %s => %s%s\n", $sym, $symbols{$sym}{'old_type'}.
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$symbols{$sym}{'type'}, is_ignored($symbols{$sym}{'loc'}, $sym)
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? " (ignored)" : "");
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$changed_type++ if $symbols{$sym}{'type'} ne "EXPORT_SYMBOL"
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and !is_ignored($symbols{$sym}{'loc'}, $sym);
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}
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# Changes to the hash are always bad
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if ($symbols{$sym}{'hash'} ne $symbols{$sym}{'old_hash'}) {
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printf(" HASH : %-40s : %s => %s%s\n", $sym, $symbols{$sym}{'old_hash'},
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$symbols{$sym}{'hash'}, is_ignored($symbols{$sym}{'loc'}, $sym)
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? " (ignored)" : "");
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$changed_hash++ if !is_ignored($symbols{$sym}{'loc'}, $sym);
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$module_syms{$symbols{$sym}{'loc'}}++;
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}
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}
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print "WW: $moved symbols changed location\n" if $moved;
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print "$EE $changed_type symbols changed export type and weren't ignored\n" if $changed_type;
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print "$EE $changed_hash symbols changed hash and weren't ignored\n" if $changed_hash;
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$errors++ if $changed_hash or $changed_type;
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if ($changed_hash) {
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print "II: Module hash change summary...\n";
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foreach $mod (sort { $module_syms{$b} <=> $module_syms{$a} } keys %module_syms) {
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next if ! $module_syms{$mod};
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printf(" %-40s: %d\n", $mod, $module_syms{$mod});
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}
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}
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print "II: Done\n";
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if ($errors) {
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exit($fail_exit);
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} else {
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exit(0);
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}
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