a:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)

ExecTest passes fine on Solx86 in all modes.

I borrowed the source code from the bug

    4482614 LINUX: process reaping is broken
    
that was integrated in merlin-beta2.

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

Name: agR10195 Date: 03/04/2002



Alexey Gibadullin, ###@###.###

Please, note, that in case 1 the test crashes VM, but java
still returns 0 (normal termination of the process):

$ ../jdk1.4.1-b02/linux-i386/bin/java ExecTest ; echo "result="$?

...
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.1-beta-b02 mixed mode)
#
# An error report file has been saved as hs_err_pid6786.log.
# Please refer to the file for further information.
#
result=0


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

Name: agR10195 Date: 03/07/2002



Alexey Gibadullin, ###@###.###

This bug affects the following test from testbase_nsk:

    nsk/regression/b4482614
    
The test will appear in the next release r13 of testbase_nsk
testbase located at

    /net/sqesvr.sfbay/export/vsn/VM/testbase/testbase_nsk

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


Name: agR10195 Date: 03/01/2002



Alexey Gibadullin, ###@###.###

The following test starts 9 concurrent threads. Each thread
starts 1000 simple processes one after another. However, sometimes
it crashes the VM (Hopper-b02).

public class ExecTest {
    public static void main(String[] argv) {
        for (int i = 1; i < 10; i++) {
            final int N = i;
            new Thread() {
                public void run() {
                    ExecTest c = new ExecTest(N);
                }
            }.start();
        }
    }
    
    ExecTest(int i) {
        doExecs(i);
    }
    
    private void doExecs(int n) {
        int i = 0;
        while (true) {
            try {
                Runtime rt = Runtime.getRuntime();
                Process p = rt.exec("ls");
                p.waitFor();
                System.out.println("Thread " + n + " created " +
                                   ++i + " processes so far");
                if (i >= 1000) {
                    System.out.println("Thread " + n + " finished.");
                    break;
                }
            } catch (Exception e) {
                System.out.println(n + " thread caught " + e.getMessage());
                e.printStackTrace(System.out);
                return;
            }
        }
    }
}

Note, that "ls" command must be provided with PATH enviroment.

The crash was observed just on Linux and Windows.

1. a). The test regulary fails on dual-CPU Linux machine (Intel: dual-CPU i686 600MHz,
       RAM 512Mb; OS: Linux/RedHat6.2) in all modes.
   
       $ uname -a
       Linux java9 2.2.19-6.2.12smp #1 SMP Fri Oct 26 13:31:09 EDT 2001 i686 unknown
   
   b). The crash on Linux machine with one CPU is intermittent (2 times out of 32
       attempts) and was observer just against Server VM in -Xint and -Xcomp modes.

The output for Linux machines is:
   
.....
Thread 2 created 75 processes so far
Thread 9 created 73 processes so far
Thread 4 created 74 processes so far
Thread 7 created 76 processes so far
Thread 3 created 75 processes so far
   
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : 11 occurred at PC=0x4008CEA8
Function=malloc+0x9C8
Library=/lib/libc.so.6

Current Java thread:
at java.lang.Thread.start(Native Method)
- locked <0x440cd368> (a java.lang.Thread)
at java.lang.UNIXProcess$3.run(UNIXProcess.java:177)
at java.security.AccessController.doPrivileged(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:164)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)

Dynamic libraries:
08048000-0804d000 r-xp 00000000 00:0b 5922713
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/bin/java
0804d000-0804e000 rw-p 00004000 00:0b 5922713
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/bin/java
40000000-40013000 r-xp 00000000 08:01 52396 /lib/ld-2.1.3.so
40013000-40014000 rw-p 00012000 08:01 52396 /lib/ld-2.1.3.so
40015000-40016000 r--p 00000000 08:01 69564
/usr/share/locale/en_US/LC_MESSAGES/SYS_LC_MESSAGES
40016000-40017000 r--p 00000000 08:01 37954 /usr/share/locale/en_US/LC_MONETARY
40017000-40018000 r--p 00000000 08:01 37956 /usr/share/locale/en_US/LC_TIME
40018000-40019000 r--p 00000000 08:01 37955 /usr/share/locale/en_US/LC_NUMERIC
40019000-4001b000 r--s 00000000 00:0b 1776205
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/ext/dnsns.ja
r
4001c000-40027000 r-xp 00000000 08:01 48361 /lib/libpthread-0.8.so
40027000-4002e000 rw-p 0000a000 08:01 48361 /lib/libpthread-0.8.so
4002f000-40031000 r-xp 00000000 08:01 52400 /lib/libdl-2.1.3.so
40031000-40033000 rw-p 00001000 08:01 52400 /lib/libdl-2.1.3.so
40033000-40120000 r-xp 00000000 08:01 52397 /lib/libc-2.1.3.so
40120000-40124000 rw-p 000ec000 08:01 52397 /lib/libc-2.1.3.so
40129000-403ec000 r-xp 00000000 00:0b 5211374
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/client/
li
bjvm.so
403ec000-40537000 rw-p 002c2000 00:0b 5211374
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/client/
li
bjvm.so
4054b000-4055d000 r-xp 00000000 08:01 52402 /lib/libnsl-2.1.3.so
4055d000-4055f000 rw-p 00011000 08:01 52402 /lib/libnsl-2.1.3.so
40561000-40595000 r-xp 00000000 08:01 48951 /usr/lib/libstdc++-2-libc6.1-1-2.9.0.so
40595000-405a1000 rw-p 00033000 08:01 48951 /usr/lib/libstdc++-2-libc6.1-1-2.9.0.so
405a3000-405bf000 r-xp 00000000 08:01 52401 /lib/libm-2.1.3.so
405bf000-405c0000 rw-p 0001b000 08:01 52401 /lib/libm-2.1.3.so
405c0000-405c9000 r-xp 00000000 00:0b 5545806
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/native_
th
reads/libhpi.so
405c9000-405ca000 rw-p 00008000 00:0b 5545806
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/native_
th
reads/libhpi.so
405ca000-405db000 r-xp 00000000 00:0b 5205327
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libveri
fy
.so
405db000-405dd000 rw-p 00010000 00:0b 5205327
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libveri
fy
.so
405dd000-405ff000 r-xp 00000000 00:0b 5205328
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libjava
.s
o
405ff000-40601000 rw-p 00021000 00:0b 5205328
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libjava
.s
o
40603000-40617000 r-xp 00000000 00:0b 5205330
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libzip.
so
40617000-4061a000 rw-p 00013000 00:0b 5205330
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/i386/libzip.
so
4061a000-41c97000 r--s 00000000 00:0b 3071238
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/rt.jar
41cd9000-41cf0000 r--s 00000000 00:0b 3071219
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/sunrsasign.j
ar
41cf0000-41d5e000 r--s 00000000 00:0b 3071221
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/jsse.jar
41d5e000-41d71000 r--s 00000000 00:0b 3071220
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/jce.jar
41d71000-41ff2000 r--s 00000000 00:0b 3071236
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/charsets.jar
4c120000-4c136000 r--p 00000000 08:01 37953 /usr/share/locale/en_US/LC_CTYPE
4c136000-4c13e000 r--p 00000000 08:01 36573 /usr/share/locale/en_US/LC_COLLATE
4c145000-4c14d000 r-xp 00000000 08:01 52404 /lib/libnss_files-2.1.3.so
4c14d000-4c14e000 rw-p 00007000 08:01 52404 /lib/libnss_files-2.1.3.so
4c14e000-4c157000 r-xp 00000000 08:01 52407 /lib/libnss_nisplus-2.1.3.so
4c157000-4c159000 rw-p 00008000 08:01 52407 /lib/libnss_nisplus-2.1.3.so
4c159000-4c161000 r-xp 00000000 08:01 52406 /lib/libnss_nis-2.1.3.so
4c161000-4c163000 rw-p 00007000 08:01 52406 /lib/libnss_nis-2.1.3.so
4c18e000-4c1ab000 r--s 00000000 00:0b 1776204
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/ext/sunjce_p
ro
vider.jar
4c1ab000-4c1b9000 r--s 00000000 00:0b 1776207
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/ext/ldapsec.
ja
r
4c300000-4c3a3000 r--s 00000000 00:0b 1776206
/.automount/novo172/root/export/home/java/dest/jdk1.4.1-b02/linux-i386/jre/lib/ext/localeda
ta
.jar

Local Time = Fri Mar 1 11:22:08 2002
Elapsed Time = 14
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.1-beta-b02 mixed mode)
#

The test also leaves orphan processes, if it crashes the VM.

$ ps -Afww
gaz 19494 1 1 14:05 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23977 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23978 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23980 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23986 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23989 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23990 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
gaz 23992 1 0 14:06 pts/2 00:00:00 ../jdk1.4.1-b02/linux-i386/bin/java -Xcomp
ExecTest
   
   
2. The test also crashes Server java_g on Windows in default mode:

#
# HotSpot Virtual Machine Error, assertion failure
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Java VM: Java HotSpot(TM) Server VM (1.4.1-beta-b02-debug mixed mode)
#
# assert(block != 0, "Must have had at least one input to phi")
#
# Error ID: D:/jdk1.4.1/hotspot\src\share\vm\opto\gcm.cpp, 356
#
# Problematic Thread: prio=5 tid=0x00259328 nid=0x1018 runnable
#

3. After 30-50 processes has finished, Runtime.exec() starts throwing
   "java.io.IOException: Too many open files" exception on Solsparc
   and Solsparcv9 in all modes. However, IOException is legal exception
   for Runtime.exec(), it looks strange in this situation. Note, that
   not more than 9 processes work at the same time.
   
...
Thread 8 created 36 processes so far
Thread 3 created 36 processes so far
3 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 1 created 40 processes so far
Thread 7 created 37 processes so far
Thread 6 created 38 processes so far
Thread 4 created 28 processes so far
4 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
6 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 9 created 37 processes so far
Thread 8 created 37 processes so far
Thread 2 created 39 processes so far
Thread 5 created 38 processes so far
8 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
5 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 1 created 41 processes so far
Thread 7 created 38 processes so far
1 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 9 created 38 processes so far
Thread 2 created 40 processes so far
Thread 7 created 39 processes so far
7 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 2 created 41 processes so far
Thread 9 created 39 processes so far
9 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
at ExecTest.doExecs(ExecTest.java:22)
at ExecTest.<init>(ExecTest.java:14)
at ExecTest$1.run(ExecTest.java:7)
Thread 2 created 42 processes so far
2 thread caught Too many open files
java.io.IOException: Too many open files
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:54)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.jav