Today a SecureSM security manager allows defining a list of packages
that can exit the VM. However, today there are no restrictions on
defining a package inside another JAR. This commit strengthens the
ability to prevent exit by allowing construction of SecureSM to be done
with a list of regular expressions (instead of a list of prefix names)
that classes will be tested against. With this, a security manager can
be installed that permits only exiting from an exact list of classes.
Relates #5
Today, SecureSM has a mechanism that enables a hardcoded list of test
packages to exit if the SecureSM instance is constructed with a boolean
flag indicating that these packages will be permitted to exit. This
commit replaces this mechanism by allowing the SecureSM instance to be
constructed with a whitelist of packages that can exit.
Relates #4
This commit adds an assertion to the TestSecureSM#testNoModifySibling
test that sanity checks that the second child was actually interrupted
and therefore actually attempted to interrupt the first child.
Jason Tedor
Robert Muir