(S) RFR: 8141024: [Solaris] Obsolete UseAltSigs (original) (raw)

Dmitry Dmitriev dmitry.dmitriev at oracle.com
Mon Nov 16 12:12:06 UTC 2015

David,

Looks good to me!

Thanks, Dmitry

On 16.11.2015 2:57, David Holmes wrote:

Hi Dmitry,

On 16/11/2015 6:06 AM, Dmitry Dmitriev wrote: Hello David,

As Sergei wrote, the link to the webrev is missed, but I think here is the right one: http://cr.openjdk.java.net/~dholmes/8141024/webrev/ <http://cr.openjdk.java.net/%7Edholmes/8141024/webrev/> Yes that is the one - sorry about the missing link. Look good to me, just one comment: 1) src/share/vm/runtime/arguments.cpp Lines 3040-3042: Some time ago when I deprecate other -X flags you recommend to use JDKVersion::jdk(9) instead of hardcoded string, because it won't need to be updated when the new version string comes in. Probably, you can do the same? :) Also, I think that you can just add "-Xusealtsigs" to the "if" at lines 2954-2957 to the other deprecated -X options, i.e. something like that: } else if (matchoption(option, "-Xoss", &tail) || matchoption(option, "-Xsqnopause") || matchoption(option, "-Xoptimize") || matchoption(option, "-Xboundthreads") || matchoption(option, "-Xusealtsigs")) { // All these options are deprecated in JDK 9 and will be removed in a future release char version[256]; JDKVersion::jdk(9).tostring(version, sizeof(version)); warning("Ignoring option %s; support was removed in %s", option->optionString, version); Good suggestion - updated webrev: http://cr.openjdk.java.net/~dholmes/8141024/webrev.v2 Thanks, David Thanks, Dmitry On 14.11.2015 10:45, David Holmes wrote: Ping!

Thanks, David On 13/11/2015 11:31 AM, David Holmes wrote: Bug: https://bugs.openjdk.java.net/browse/JDK-8141024

webrev:

History: The JVM claimed SIGUSR1 and SIGUSR2 for the INTERRUPT and ASYNC signals, respectively. -Xusealtsigs, mapping to -XX:+UseAltSigs, was provided to allow users to reclaim those signals and instead use two of the real-time signals (between SIGRTMIN and SIGRTMAX) As of Solaris 10, Solaris provides SIGJVM1 and SIGJVM2 exclusively for the JVMs use. This avoids any conflict with user-defined signal usage. As of Java 6 we documented that on Solaris 10 -Xusealtsigs/-XX:+UseAltSigs had no affect: http://www.oracle.com/technetwork/java/javase/signals-139944.html#gbzbh As we no longer support Solaris versions older than 10, we do not need the UseAltSigs functionality and the flags can be made Obsolete. Thanks, David

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