Name: egR10015 Date: 03/12/2002



Hprof agent shipped with HotSpot 1.4.1-b04 fails to pass the following test

nsk/hprof/regression/b4462993

from testbase_nsk on all platforms. Some GC roots in heap dump in generated
profile are still not recognized by the agent.

The mentioned test is a regression one written to cover the following bug:

4462993 GC roots not recognized by hprof

This bug has been closed as fixed verified. However, the described issue was
not completely fixed: now reported heap dump has no records like follows:

ROOT 106d80 (kind=<system class>, name=<Unknown>)
ROOT 204578 (kind=<unknown>)

as expected, but it still contains some records with unknown GC roots like
follows:

ROOT 0 (kind=<thread>, id=0, trace=263)
ROOT 0 (kind=<JNI global ref>, id=9fa20, trace=0)

Note that HotSpot 1.4.0-b92 also fails to pass the test, and Classic VM 1.2.2
successfully recognizes all GC roots.

To reproduce the bug run with HS1.4.1

sh doit.sh $JAVA_HOME

in /net/sqesvr.sfbay/export/vsn/GammaBase/Bugs/<this bug number>

where JAVA_HOME should point to jdk1.4.1

The profiling information is written out to the file b4462993.hprof.out.

------------------ output on SolSparc with HS 1.4.1-b04: --------------------
$ sh doit.sh ~/hotspot/jdk1.4.1/solsparc
java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b04)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b04, mixed mode)

Executing the test ...
Dumping Java heap ... done.

TEST FAILED: the following unknown GC roots were found in heap dump:
        ROOT 0 (kind=<thread>, id=0, trace=263)
        ROOT 0 (kind=<JNI global ref>, id=9fa20, trace=0)
        ROOT 0 (kind=<JNI global ref>, id=9fa24, trace=0)
exit code = 97
-----------------------------------------------------------------------------

-------------------- output on SolSparc with HS 1.2.2-W: --------------------
$ sh doit.sh ~/hotspot/jdk1.2.2/solsparc
java version "1.2.2"
Classic VM (build JDK-1.2.2-W, green threads, sunwjit)

Executing the test ...
Dumping Java heap ... done.
exit code = 95
-----------------------------------------------------------------------------

The test b4462993 will be available in release r13 of the testbase_nsk.
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