Name: egR10015 Date: 01/25/2002



Hprof agent shipped with HotSpot 1.4.0-rc-b91 does not check options "depth",
"cutoff" for validation. These options specify values of stack trace depth and
output cutoff point accordingly. It implies that their values should accept
only positive numbers, and additionally, trace depth can be only an integer.
But in fact, any values including negative integers and non-numeric characters
can be assigned to them. Moreover, a negative integer assigned to the depth
option, leads to HPROF ERROR: ***Out of Memory*** with VM crash at
vmThread.cpp, 444.

To reproduce the bug run HS1.4 Hprof with erroneous values of depth, cutoff
mentioned above.
Here is a simple test:

class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World");
    }
}

------------------- output on SolSparc with HS 1.4.0-b91: ---------------------
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:depth=-1 HelloWorld
HPROF ERROR: ***Out of Memory***, exiting.
#
# HotSpot Virtual Machine Error, Internal Error
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Client VM (1.4.0-rc-b91 mixed mode)
#
# Error happened during: post JVMPI object allocation
#
# Error ID: 564D3448524541440E43505001BC 01
#
# Problematic Thread: prio=5 tid=0x2bd40 nid=0x1 runnable
#
Abort
$
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:depth=oops HelloWorld
Hello World
Dumping Java heap ... allocation sites ... done.
$
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:depth=0.4 HelloWorld
Hello World
Dumping Java heap ... allocation sites ... done.
$
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:cutoff=-5 HelloWorld
Hello World
Dumping Java heap ... allocation sites ... done.
$
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:cutoff=bad HelloWorld
Hello World
Dumping Java heap ... allocation sites ... done.
$
-------------------------------------------------------------------------------

Note that Hprof does check other options for validation as well as empty depth
and cutoff values, for example:

$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:heap=oops HelloWorld
HPROF ERROR: bad hprof option
$ ~/hotspot/jdk1.4/solsparc/bin/java -Xrunhprof:depth= HelloWorld
HPROF ERROR: bad hprof option
$

This bug affects the following tests from testbase_nsk:

nsk/hprof/options/depth/depth007
nsk/hprof/options/depth/depth008
nsk/hprof/options/cutoff/cutoff008
nsk/hprof/options/cutoff/cutoff009

======================================================================