Code review request, 7115524: sun.security.provider.certpath.ssl.SSLServerCertStore no longer works

[Weijun Wang]

On Nov 26, 2011, at 10:58 PM, Xuelei Fan <xuelei.fan at oracle.com> wrote:

> I was wondering why we synchronized the getInstance() and
> engineGetCertificates(). It seems that we only need to synchronize the
> serverChain variable.
> 
> I will update the synchronization if no objection.
> 
> Thanks,
> Xuelei
> 
> On 11/26/2011 10:42 PM, Xuelei Fan wrote:
>> On 11/26/2011 9:59 PM, Weijun Wang wrote:
>>> Hi Xuelei
>>> 
>>> Why move the local variables to static fields?
>>> 
>> In order to improve the performance. SSLContext.init() is expensive.
>> 
>>> The engineGetCertificates method is only synchronized on this but not the whole class, so there is a chance that the method is called by multiple threads at the same time. This means if you only use one static GetChainTrustManager field, its serverChain field can be modified by different threads.
>>> 
>> We have synchronized the engineGetCertificates(), and this method is the
>> only method to access the GetChainTrustManager object. As the attribute
>> is declared as "final static", so it will be initialized once even in
>> multiple threads.

But this method is only synchronized on the instance, not the class. You can create two SSLServerCertStore objects can call this method at the same time.

Max

>> 
>> That's, the access to serverChain variable has been synchronized by
>> synchronizing the engineGetCertificates method.
>> 
>> Xuelei
>> 
>>> -Max
>>> 
>>> On Nov 26, 2011, at 8:43 PM, Xuelei Fan wrote:
>>> 
>>>> webrev: http://cr.openjdk.java.net/~xuelei/7115524/webrev.00/
>>>> 
>>>> No new regression test, the current test,
>>>> test/sun/security/tools/keytool/printssl.sh, has already been able to
>>>> test the update.
>>>> 
>>>> Thanks,
>>>> Xuelei
>>> 
>> 
>