Patch for error in jdk_version_info reporting at jdk_util.c:79

[Andrew Dinn]

There is an error in the latest jdk6/jdk tree which can lead it to
misreporting information passed to the JVM in the jdk_version_info
structure. In particular, this has been observed to cause the JVM GC
code in versions later than jdk6-b28 to fail to notify discovered
Reference instances to the JDK.

The error is in function JDK_GetVersionInfo0 in file
jdk/src/share/native/common/jdk_util.c at line 79

    memset(info, 0, sizeof(info_size));

The size of the struct be zeroed (info) is info_size (24 in the latest
jdk6/hotspot tree). The line above only zeroes the first 8 bytes. The
correct code is

    memset(info, 0, info_size);

regards,


Andrew Dinn
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