RFR: 8371333: Optimize static initialization of SSLContextImpl classes and improve logging [v6]

[Hai-May Chao]

On Mon, 23 Feb 2026 15:36:28 GMT, Sean Coffey <coffeys at openjdk.org> wrote:

>> Introduce lazy static initialization logic to SSLContextImpl via use of the new LazyConstant API and improve logging output
>> 
>> As per JBS comments:
>> 
>> * Each subclass of AbstractTLSContext (TLSv10. TLSv11 etc) is being initialization at framework initialization time due to the getApplicableSupportedCipherSuites(..) calls made in static block. Such calls are unnecessary if the subclass isn't required. This is especially true for the default JDK configuration where TLSv10, TLSv11 protocols are disabled. I've moved logic to lazy initialization of these fields via LazyConstant
>> 
>> * The debug prints output never made clear what protocol version each cipher suite was being disabled for. Improved logging there
>> * The debug prints never printed out the resulting set of enabled/allowed cipher suites
>> 
>> There's efficiency gain also in having one less call to the getApplicableEnabledCipherSuites method in the scenario where customized cipher suites are not in use.
>> 
>> example of new debug output:
>> 
>> 
>> javax.net.ssl|TRACE|30|main|2025-11-26 14:31:31.997 GMT|SSLContextImpl.java:425|Ignore disabled cipher suites for protocols:[TLSv1.3, TLSv1.2]
>> [TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
>> TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384,TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
>> TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
>> TLS_ECDH_RSA_WITH_AES_256_CBC_SHA,TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDH_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_GCM_SHA384
>> TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA
>> TLS_RSA_WITH_AES_128_CBC_SHA]
>> javax.net.ssl|TRACE|30|main|2025-11-26 14:31:31.997 GMT|SSLContextImpl.java:425|Available cipher suites for protocols:[TLSv1.3, TLSv1.2]
>> [TLS_AES_256_GCM_SHA384,TLS_AES_128_GCM_SHA256,TLS_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
>> TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
>> TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
>> TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_DHE_DSS_WITH_AES_256_GCM_SHA384,TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
>> TLS_DHE_DSS_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SH...
>
> Sean Coffey has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 11 commits:
> 
>  - Clean up sync of DebugPropertyValuesTest.java
>  - Remove verbose option for now, difficult to exercise code path
>  - Merge branch 'master' into 8371333-ssl-debug
>  - Merge branch 'master' into 8371333-ssl-debug
>  - Incorportate comments from Jamil
>  - Merge branch 'master' into 8371333-ssl-debug
>  - Merge branch 'master' into 8371333-ssl-debug
>  - Move wrapText method to Utilities
>  - Merge branch 'master' into 8371333-ssl-debug
>  - use LINE_SEP
>  - ... and 1 more: https://git.openjdk.org/jdk/compare/a2961293...ed4c5687

test/jdk/sun/security/ssl/SSLLogger/DebugPropertyValuesTest.java line 64:

> 62:                 List.of("\"logger\".*: \"javax.net.ssl\",",
> 63:                     "\"specifics\"   : \\[",
> 64:                     "\"message\".*: \"Produced ClientHello handshake message"));

It looks like we could keep the original code as is with 8-space indent.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28511#discussion_r2843618892