Commit bacc3081 authored by Richard Levitte's avatar Richard Levitte
Browse files

Recognise clang -fsanitize options and translate them 



Because we depend on knowing if clang's address, memory or undefinedbehavior
sanitizers are enabled, we make an extra effort to detect them among the
C flags, and adjust the %disabled values accordingly.

Reviewed-by: default avatarBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/8778)
parent 0109e030

Configure

+24 −3
Original line number Diff line number Diff line
@@ -1340,6 +1340,27 @@ unless ($disabled{threads}) { 
    }

}



# Find out if clang's sanitizers have been enabled with -fsanitize

# flags and ensure that the corresponding %disabled elements area

# removed to reflect that the sanitizers are indeed enabled.

my %detected_sanitizers = ();

foreach (grep /^-fsanitize=/, @{$config{CFLAGS} || []}) {

    (my $checks = $_) =~ s/^-fsanitize=//;

    foreach (split /,/, $checks) {

        my $d = { address       => 'asan',

                  undefined     => 'ubsan',

                  memory        => 'msan' } -> {$_};

        next unless defined $d;



        $detected_sanitizers{$d} = 1;

        if (defined $disabled{$d}) {

            die "***** Conflict between disabling $d and enabling $_ sanitizer"

                if $disabled{$d} ne "default";

            delete $disabled{$d};

        }

    }

}



# If threads still aren't disabled, add a C macro to ensure the source

# code knows about it.  Any other flag is taken care of by the configs.

unless($disabled{threads}) {
@@ -1367,12 +1388,12 @@ if ($disabled{"dynamic-engine"}) { 
        $config{dynamic_engines} = 1;

}



unless ($disabled{asan}) {

unless ($disabled{asan} || defined $detected_sanitizers{asan}) {

    push @{$config{cflags}}, "-fsanitize=address";

    push @{$config{cxxflags}}, "-fsanitize=address" if $config{CXX};

}



unless ($disabled{ubsan}) {

unless ($disabled{ubsan} || defined $detected_sanitizers{ubsan}) {

    # -DPEDANTIC or -fnosanitize=alignment may also be required on some

    # platforms.

    push @{$config{cflags}}, "-fsanitize=undefined", "-fno-sanitize-recover=all";
@@ -1380,7 +1401,7 @@ unless ($disabled{ubsan}) { 
        if $config{CXX};

}



unless ($disabled{msan}) {

unless ($disabled{msan} || defined $detected_sanitizers{msan}) {

  push @{$config{cflags}}, "-fsanitize=memory";

  push @{$config{cxxflags}}, "-fsanitize=memory" if $config{CXX};

}