xCAT/xNBA
2
0
Fork 0
mirror of https://github.com/xcat2/xNBA.git synced 2024-12-23 19:51:46 +00:00
Code Issues Projects Releases Wiki Activity

Report on misuses of shared symbols, and excessively large static symbols.

Browse Source
This commit is contained in:
Michael Brown 2005-05-02 15:21:12 +00:00
parent 734d2e9f2d
commit 35ab3bf808
1 changed files with 55 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
src/util/symcheck.pl
View File

@ -44,12 +44,15 @@ foreach my $link_sym qw ( _prefix _eprefix _decompress _edecompress _text
};
}
# Build up requires and provides tables for global symbols
# Build up requires, provides and shares symbol tables for global
# symbols
#
my $globals = {};
while ( ( my $object, my $symbols ) = each %$symtab ) {
while ( ( my $symbol, my $info ) = each %$symbols ) {
if ( $info->{global} ) {
my $category = ( ( $info->{type} eq 'U' ? "requires" : "provides" ) );
my $category = ( ( $info->{type} eq 'U' ? "requires" :
( $info->{type} eq 'C' ? "shares" : "provides" ) ) );
$globals->{$symbol}->{$category}->{$object} = 1;
}
}
@ -61,17 +64,55 @@ my $problems = {};
while ( ( my $symbol, my $info ) = each %$globals ) {
my @provides = keys %{$info->{provides}};
my @requires = keys %{$info->{requires}};
my @shares = keys %{$info->{shares}};
if ( @provides == 0 ) {
# No object provides this symbol
if ( ( @provides == 0 ) && ( @shares == 1 ) ) {
# A symbol "shared" by just a single file is actually being
# provided by that file; it just doesn't have an initialiser.
@provides = @shares;
@shares = ();
}
if ( ( @requires > 0 ) && ( @provides == 0 ) ) {
# No object provides this symbol, but some objects require it.
$problems->{$_}->{nonexistent}->{$symbol} = 1 foreach @requires;
} elsif ( @provides > 1 ) {
# Symbol defined in multiple objects
}
if ( ( @requires == 0 ) && ( @provides > 0 ) ) {
# No object requires this symbol, but some objects provide it.
$problems->{$_}->{unused}->{$symbol} = 1 foreach @provides;
}
if ( ( @shares > 0 ) && ( @requires > 0 ) ) {
# A shared symbol is being referenced from another object
$problems->{$_}->{shared}->{$symbol} = 1 foreach @requires;
}
if ( ( @shares > 0 ) && ( @provides > 0 ) ) {
# A shared symbol is being initialised by an object
$problems->{$_}->{shared}->{$symbol} = 1 foreach @provides;
}
if ( ( @shares > 0 ) && ! ( $symbol =~ /^_shared_/ ) ) {
# A shared symbol is not declared via __shared
$problems->{$_}->{shared}->{$symbol} = 1 foreach @shares;
}
if ( @provides > 1 ) {
# A non-shared symbol is defined in multiple objects
$problems->{$_}->{multiples}->{$symbol} = 1 foreach @provides;
}
if ( @requires == 0 ) {
# Symbol not required
$problems->{$_}->{unused}->{$symbol} = 1 foreach @provides;
}
# Check for excessively large local symbols
#
while ( ( my $object, my $symbols ) = each %$symtab ) {
while ( ( my $symbol, my $info ) = each %$symbols ) {
if ( ( ! $info->{global} ) &&
( $info->{type} ne 't' ) &&
( $info->{size} >= WARNING_SIZE ) ) {
$problems->{$object}->{large}->{$symbol} = 1;
}
}
}
@ -83,9 +124,13 @@ foreach my $object ( sort keys %$problems ) {
my @nonexistent = sort keys %{$problems->{$object}->{nonexistent}};
my @multiples = sort keys %{$problems->{$object}->{multiples}};
my @unused = sort keys %{$problems->{$object}->{unused}};
my @shared = sort keys %{$problems->{$object}->{shared}};
my @large = sort keys %{$problems->{$object}->{large}};
print "WARN $object provides unused symbol $_\n" foreach @unused;
$warnings += @unused;
print "WARN $object has large static symbol $_\n" foreach @large;
$warnings += @large;
print "ERR $object requires non-existent symbol $_\n" foreach @nonexistent;
$errors += @nonexistent;
foreach my $symbol ( @multiples ) {
@ -95,6 +140,7 @@ foreach my $object ( sort keys %$problems ) {
." (also provided by @other_objects)\n";
}
$errors += @multiples;
print "ERR $object misuses shared symbol $_\n" foreach @shared;
}
print "$errors error(s), $warnings warning(s)\n";