>Number: 128411
>Category: java
>Synopsis: jdk1.5 Querying JMX mbean OperatingSystem->TotalPhysicalMemorySize crashes the VM on 64bit archs.
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-java
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Oct 27 08:30:06 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Nikolay Denev
>Release: 7.1-PRERELEASE
>Organization:
>Environment:

FreeBSD XXX 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #1: Wed Oct 22 15:35:49 UTC 2008 root@XXX:/usr/obj/usr/src/sys/CORE2 amd64
>Description:

The FreeBSD specific part of the OperationgSystem mbean uses sysctl(3) to query various parameters related to memory usage.
The sysctl(3) call requires an argument of type 'size_t' to set the size of the reqested value but in one
place the bsd-jdk15-patchset uses variable of type 'int' for this, which does not work correctly because
int is 32bits and size_t is 64bits on 64bit archs.
Querying this attribute (TotalPhysicalMemorySize) results in VM crash.
>How-To-Repeat:

Start an application with remote JMX enabled and connect to it with jconsole.
>Fix:

The attached patch to the bsd-jdk15-patchset8 fixes the problem.

Patch attached with submission follows:

--- jdk15.patches 2008-02-05 07:01:27.000000000 +0200
+++ jdk15.patches.fixed 2008-10-24 11:58:53.000000000 +0300
@@ -90835,7 +90835,7 @@
+#ifdef _ALLBSD_SOURCE
+ unsigned long result;
+ int mib[2];
-+ int rlen;
++ size_t rlen;
+
+ mib[0] = CTL_HW;
+ mib[1] = HW_PHYSMEM;


>Release-Note:
>Audit-Trail:
>Unformatted:

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