[jdk21u-dev] RFR: 8348986: Improve coverage of enhanced exception messages

[Alexey Bakhtin]

On Fri, 29 Aug 2025 00:23:47 GMT, Alexey Bakhtin <abakhtin at openjdk.org> wrote:

> I'd like to backport JDK-8348986 to control sensitive information in Exception messages.
> 
> Backport is not clean. The following changes were applied manually:
> - src/java.base/share/classes/module-info.java
>   - exports jdk.internal.util updated manually because JDK25 has more dependencies 
> - src/java.base/share/classes/sun/nio/ch/DatagramSocketAdaptor.java
>   - copyright year
> - src/java.base/share/classes/sun/nio/ch/SocketAdaptor.java
>   - changes discarded. JDK21 does not have JDK-8343791 and related changes (Socket::connect() does not throw UnknownHostException)
> - src/java.base/unix/classes/sun/nio/ch/UnixAsynchronousSocketChannelImpl.java
>   - trivial merge in the import section, copyright year is updated
> - src/java.base/unix/classes/sun/nio/fs/UnixUserPrincipals.java
>   - trivial merge in the lookupName() method. JDK21 version still has SecurityManager related code
>   - copyright year
> - src/java.base/share/classes/sun/net/util/IPAddressUtil.java
>   - JDK21 does not have JDK-8272215 It can not be backported because of API changes. validateNumericFormatV4() method is changed instead of invalidIpAddressLiteral
>   - copyright year
> - src/jdk.httpserver/share/classes/sun/net/httpserver/simpleserver/JWebServer.java
>   - setEnhancedExceptions method was added manually because of a context difference
> - src/java.base/share/classes/java/net/HostPortrange.java
>   - copyright year
> - src/java.base/share/classes/java/net/Inet6Address.java
>   - changes discarded. JDK21 does not have JDK-8272215 and related functionality. 
> - src/java.base/share/classes/java/net/InetAddress.java
>   - UnknownHostException in the getLocalHost method is updated manually because of a context difference
>   - copyright year
> - src/java.base/share/classes/java/net/Proxy.java
>   - copyright year
>   - import section
> - src/java.base/share/classes/java/net/SocketPermission.java
>   - copyright year
> - src/java.base/share/classes/java/net/SocksSocketImpl.java
>   - copyright year
>   - import section
> - src/java.base/share/classes/java/net/URL.java
>   - copyright year
>   - import section
> - src/java.net.http/share/classes/jdk/internal/net/http/websocket/OpeningHandshake.java
>   - copyright year
> - src/java.base/share/native/libnet/net_util.c
>   - copyright year
> - src/java.base/share/native/libnet/net_util.h
>   - copyright year
> - src/java.base/unix/native/libnet/net_util_md.c
>   - copyright year
> - src/java.base/windows/classes/sun/nio/ch/WindowsAsynchronousSocketChannelImpl.java
>   - copyright year
>   - import section
> - src/java.base...

java/lang/SecurityManager/CheckAccessClassInPackagePermissions test failure is not related to the current changes

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/2132#issuecomment-3268618042