Name: dkC59003 Date: 05/25/99



HotSpot Client VM 1.3betaD sometimes crashes by reaching "user breakpoint"
instruction (x86 instruction "int 3"). Such failure is unstable, and HotSpot
1.3betaD sometimes crashes and returns exit code -1073741571 or -1073741819
for the same test programs, and sometimes does not crash (passes the tests).

This problem is revealed by the following tests:
    ${TESTBASE}/src/nsk/coverage/resourcearea/resourcearea001
    ${TESTBASE}/src/nsk/stress/jck12a/jck12a006
    ${TESTBASE}/src/nsk/regression/b4213329
The path to the Novosibirsk testbase at Cupertino is:
    TESTBASE=/net/sqesvr/vsn/testbase/testbase_nsk
(The test "b4213329" is not yet putbacked into the testbase. Please,
find its source enclosed below.)

While executing the test "jck12a006" or "b4213329" on Windows NT,
I have observed the following window:
    java.exe - Application Error
    The exception Breakpiont has been reached (0x80000003) occured
    in the application at location 0x08047764.
and while executing the test "resourcearea001" I have observed:
    java.exe - Application Error
    A breakpoint has been reached (0x80000003) occured
    in the application at location 0x08047764.

The Microsoft DevStudio debugger displays the window:
    "User breakpoint called from code at 0x8047764"
and shows, that there is the interrupt instruction at that location:
    ...
    08047761 add esp,0Ch
 ==>08047764 int 3

When I closed debugger window, error message also had been printed
for each of these tests:

    EXECUTION STOPPED: Stack Overflow Handling Is Not Implemented.
    eip = 0x00a7186a
    eax = 0x00a78200
    ebx = 0x0c1e71b8
    ecx = 0x0082b1c0
    edx = 0x00a78050
    edi = 0x0082b1c0
    esi = 0x0c1e6660
    ebp = 0x0f0d3000
    esp = 0x0f0d2ff0
    TEST FAIL nsk/coverage/resourcearea/resourcearea001 compile_and_execute

    EXECUTION STOPPED: Stack Overflow Handling Is Not Implemented.
    eip = 0x00a7186a
    eax = 0x00a90a20
    ebx = 0x0c2e0e28
    ecx = 0x20de0a40
    edx = 0x00a909d0
    edi = 0x0c2e0fd8
    esi = 0x00000001
    ebp = 0x221d300c
    esp = 0x221d2ff4
    TEST FAIL nsk/stress/jck12a/jck12a006 compile_and_execute

    EXECUTION STOPPED: Stack Overflow Handling Is Not Implemented.
    eip = 0x00a7186a
    eax = 0x00a74860
    ebx = 0x0c1e3640
    ecx = 0x007d1d90
    edx = 0x00a74810
    edi = 0x0c1e37f0
    esi = 0x00000001
    ebp = 0x00033004
    esp = 0x00032ff0
    TEST FAIL nsk/regression/b4213329 compile_and_execute

Since none of the tests "resourcearea001", nor "jck12a006", nor "b4213329"
contains native methods, I believe that such crashes are caused by some
bug in HotSpot 1.3betaD.

Note, that there is also bugreport #4213329 filed against HotSparc 1.0RC1-A;
and that bug is currently fixed, integrated, and verified in 1.0_rc1 release.

The problem reported by #4213329 was unexpected exit code returned by
particular JCK 1.2a tests (exit code 95 or 97 was expected):
    test result: Failed. unexpected exit code: exit code 11
Those tests are:
    vm/concepts/exceptions/exceptions031/exceptions03101/exceptions03101.html
    vm/concepts/exceptions/exceptions031/exceptions03102/exceptions03102.html
and they are also invoked by the stress test "jck12a006".

Moreover, the test "jck12a006" sometimes returns unexpected exit code:
    E:\jdk12v\bin\java -verify jck12a006 -stress:consecutive
    Exit status of Execution is :-1073741571
as well as the test "resourcearea001":
    d:\jdk1.2\bin\java resourcearea001
    Exit status of Execution is :-1073741819

Following is the source for the test b4213329:

// File: @(#)b4213329.java 1.1 99/04/22
// Copyright 04/22/99 Sun Microsystems, Inc. All Rights Reserved

import java.io.PrintStream;

public class b4213329 {

    public static int counter = 1;

    static int Runner() {
counter = counter * -1;
int i = counter;
if(counter < 2) counter += Runner();
return i;
    }

    public static int run(String argv[], PrintStream out) {
try{
Runner();
} catch (StackOverflowError e) {
return 0;
}
return 2;
    }

    public static void main(String argv[]) {
System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
    }
}

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