How to run a benchmark with SecurityManager?

[Staffan Friberg]

Hi,

I have done a couple of benchmarks where I wanted to compare the 
performance with and without a security manager.

Since I wanted to compare I create a class with all benchmarks, which I 
then sub-classed and in the sub-class I added the following setup method.
If you only care to run the benchmark with a security manager you can 
probably skip the sub-class part and simply add the setup method.


     @Setup
     public void setup() throws IOException, NoSuchAlgorithmException {
         File policyFile = File.createTempFile("security", ".policy");
         policyFile.deleteOnExit();

         try (PrintWriter writer = new PrintWriter(policyFile);
              BufferedReader reader = new BufferedReader(new 
InputStreamReader(
this.getclass().getResourceAsStream("security.policy")))) {
             for (String line = reader.readLine(); line != null; line = 
reader.readLine()) {
                 writer.write(line);
             }
         }

         Policy policy = Policy.getInstance("JavaPolicy", new 
URIParameter(policyFile.toURI()));
         Policy.setPolicy(policy);
         System.setSecurityManager(new SecurityManager());
     }

//Staffan

On 01/27/2015 07:50 AM, Weijun Wang wrote:
> Yes, it works. See my push at 
> http://sca00bkv.us.oracle.com:8000/jdk9/secperf/jdk/rev/603dd9f84399212a7d48fc3d7589d98e85dec820.
>
> But the worst thing now is that system properties must be provided on 
> the command line and it means we cannot run multiple benchmark methods 
> in one command. (Suppose the other methods must run without a security 
> manager).
>
> --Max
>
> On 1/27/2015 20:53, Sean Mullan wrote:
>> Have you tried granting the permissions that jmh needs in your policy 
>> file?
>>
>> --Sean
>>
>> On 01/27/2015 05:52 AM, Wang Weijun wrote:
>>> Hi All
>>>
>>> I'm trying to benchmark a method that works differently when a
>>> SecurityManager is on (and with different policy files). I've tried
>>> adding -Djava.security.manager on the command line or calling
>>> System.setSecurityManager(new SecurityManager()) inside a @Setup
>>> method, but seems jmh itself cannot run correctly (because it needs
>>> reflection and thread group manipulation).
>>>
>>> Is there anyway to do it? Since JM itself and the benchmark is
>>> compiled into one jar, I cannot grant AllPermission to jmh and less
>>> permission on my own code.
>>>
>>> Thanks
>>> Max
>>>