Request for review 7191817: -XX:+UseSerialGC -XX:+UseLargePages crashes with SIGFPE on Mac OS X
David Holmes
david.holmes at oracle.com
Wed Oct 24 02:46:31 PDT 2012
Hi Harold,
We already have a macro for this:
// Disable options not supported in this release, with a warning if they
// were explicitly requested on the command-line
#define UNSUPPORTED_OPTION(opt, description) \
do { \
if (opt) { \
if (FLAG_IS_CMDLINE(opt)) { \
warning(description " is disabled in this release."); \
} \
FLAG_SET_DEFAULT(opt, false); \
} \
} while(0)
We use this on platforms were not all features are supported.
David
On 24/10/2012 5:04 AM, harold seigel wrote:
> Summary: Support for the -XX:+UseLargePages flag causes crashes on BSD
> platforms such as MacOS X. This proposed change adds code to print out a
> message if -XX:+UseLargePages is specified on this platform and to then
> ignore the flag.
>
> Open webrev at http://cr.openjdk.java.net/~coleenp/bug_7191817
> <http://cr.openjdk.java.net/%7Ecoleenp/bug_7191817>
>
> Bug link at http://bugs.sun.com/view_bug.do?bug_id=7191817
>
> This change was tested with JPRT and JCK tests. Also, tests were run by
> hand on a MacOS X machine specifying the -XX:+UseLargePages flag to make
> sure that the message was output and no crashes occurred.
>
> Thanks, Harold
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