RFR: 8257572: Deprecate the archaic signal-chaining interfaces: sigset and signal

[Thomas Stuefe]

On Thu, 3 Dec 2020 14:40:26 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> The signal-chaining facility was introduced in JDK 1.4 nearly 20 years ago and supported three different Linux signal API's: sigset, signal and sigaction:
>> 
>> https://docs.oracle.com/javase/8/docs/technotes/guides/vm/signal-chaining.html
>> 
>> Only sigaction is a Posix supported API for multi-threaded processes, that we can use cross-platform. Both signal and sigset are obsolete and have undefined behaviour in a multi-threaded process. From the Linux man pages:
>> 
>> sigset: This API is obsolete: new applications should use the POSIX signal API (sigaction(2), sigprocmask(2), etc.)
>> 
>> signal: The behavior of signal() varies across UNIX versions, and has also varied historically across different versions of Linux. Avoid its use: use sigaction(2) instead.
>> 
>> We should deprecate the use of signal and sigset in JDK 16 with a view to their removal in JDK 17.
>> 
>> A CSR request has been filed.
>> 
>> Testing: hotspot/jtreg/runtime/signal tests
>> 
>> Thanks,
>> David
>
> Thumbs up on the jsig.c change. No comment on the Lib.gmk change.

Hi David,

I am fine with this, but since this is possibly a breaking change would this not need a release note?

..Thomas

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PR: https://git.openjdk.java.net/jdk/pull/1587