Set the environment variable MALLOC_PERTURB_ during tests to perturb the
output from OPENSSL_malloc() calls (see the mallopt man page for details
about this environment variable). This could be a low cost way of spotting
uninit reads in "make test" runs in some situations.
In tests I have found it to be a little unreliable (sometimes it seemed to
not perturb the output for inexplicable reasons) - but since this is easy
to implement I think it is worthwhile.
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17768)
$ENV{OPENSSL_ENGINES} = rel2abs(catdir($bldtop, "engines"));
$ENV{CTLOG_FILE} = rel2abs(catfile($srctop, "test", "ct", "log_list.cnf"));
+# On platforms that support this, this will ensure malloc returns data that is
+# set to a non-zero value. Can be helpful for detecting uninitialized reads in
+# some situations.
+$ENV{'MALLOC_PERTURB_'} = '128' if !defined $ENV{'MALLOC_PERTURB_'};
+
my %tapargs =
( verbosity => $ENV{HARNESS_VERBOSE} ? 1 : 0,
lib => [ $libdir ],