Solved

System.loadLibrary() core dump

Posted on 2002-04-18
13
902 Views
Last Modified: 2007-11-27
I've just been handed this problem to look at.
I'm looking for some comments and suggestions on this.
I'm trying to decide what actions I need to take.

Thanks


JAVA/Solaris related.

In a nutshell, we have been attempting to use JAVA 1.3.0 and/or 1.3.1 on Solaris 2.8 wanting to upgrade from the JAVA 1.2.X versions. Thing is, we are unsuccessful in attempts to run on the 1.3.X versions due to the VM process aborting:

Example:
{hyperion}19%java LoadLib
Before Load Lib...
Abort (core dumped)

After running with truss it appears that the problem occurs during the loading of one of our shared libraries. Thus I created a new test, LoadLib, which only calls System.loadLibrary("ourlib") and immediately fails with the core dump.

I have added the required Solaris 2.8 patches specified by the JAVA installation documents and thing are still not working.

This behavior is strange to say the least since we can run successfully with the 1.2.x versions and NOT the 1.3.x versions.

Anyone have an issue with loadLibrary of the sort or have a clue what may be happening?

More Information:
I can compile and link my libs on Solaris 2.8 with JDK 1.2.x and everything works fine.

The call to System.loadLibrary() subsequently "core dumps" deep within the call stack of a JVM native method call, so there wouldn't be an exception to catch. You can check it out yourself, I've included the call stack I get from dbx.

The LD_LIBRARY_PATH is set properly.


Here is the class which gets run:

public class LoadLib {

static {
System.out.println("LD_LIBRARY_PATH=" + System.getProperty("java.library.path"));
System.out.println("Before Load Lib...");
try {
System.loadLibrary("com_devkit");
}
catch (Throwable t) {
System.out.println("Caught this..." + t.toString());
t.printStackTrace(System.out);
}

System.out.println("After Load Lib...");
}

public static void main (String[] args) {
System.out.println("Done!");
}
}

Here is the stack from "dbx":
Exception of type int {assumed} is unexpected
t@1 (l@4) stopped in __exdbg_notify_of_unexpected at 0xfefd5c84
0xfefd5c84: __exdbg_notify_of_unexpected : jmp %o7 + 0x8
Current function is JNIEnv_::FindClass
758 return functions->FindClass(this, name);
(/vobs/Solaris_tools/FD60/SUNWspro/WS6/bin/sparcv9/dbx) where
current thread: t@1
---- hidden frames, use 'where -h' to see them all ----
[3] __SLIP.INIT_A(0x0, 0x0, 0x0, 0x0, 0x0, 0x0), at 0xf48135f0
[4] __STATIC_CONSTRUCTOR(0xf4812f74, 0x0, 0xffe4b108, 0xff3e3728, 0x23664, 0xf4863a94), at 0xf4814840
[5] _init(0x0, 0xff3e260c, 0x1, 0xff3e260c, 0x178f8, 0x0), at 0xf4863e78
[6] call_init(0xf4863a68, 0x0, 0xff3e21e0, 0xff3e260c, 0x0, 0x400000), at 0xff3ba730
[7] dlmopen_intn(0xfed01514, 0xfa250, 0xc01, 0xfee716f4, 0x0, 0xc01), at 0xff3be09c
[8] _dlopen(0xfa250, 0x1, 0xfa250, 0x0, 0x0, 0x0), at 0xff3be17c
[9] sysLoadLibrary(0xfa250, 0xffbed2a8, 0x400, 0xffbec, 0xff2f3b44, 0xffbece2c), at 0xfecd8b20
[10] JVM_LoadLibrary(0xfa250, 0xff306ce8, 0x24940, 0xff2f3b44, 0xfa250, 0xf4c24a14), at 0xff101e48
[11] Java_java_lang_ClassLoader_00024NativeLibrary_load(0x90c68, 0xfa250, 0xff38257c, 0xff3810b8, 0x249c4, 0xffbed900), at 0xff35bc10
[12] 0x6ba20(0xf4c24a90, 0xffbedc68, 0x24940, 0xff2f3b44, 0xb6, 0xf8c35930), at 0x6ba1f
[13] 0x68ba4(0xf4c247a8, 0xf8c684f0, 0xf4c23dc8, 0x71c28, 0xf4e00000, 0xf8c35810), at 0x68ba3
[14] 0x68be8(0x24940, 0xffbedc68, 0x24940, 0x73f60, 0xb8, 0xf8ca2450), at 0x68be7
[15] 0x68ba4(0xf4c23dc0, 0xffbedc68, 0x24940, 0x71dc8, 0xb6, 0xf8c3b558), at 0x68ba3
[16] 0x68ba4(0x24940, 0xffbedc68, 0x24940, 0x71c28, 0xb8, 0xf8ca0c28), at 0x68ba3
[17] 0x68ba4(0x0, 0x1, 0xff2ffd78, 0x71dc8, 0x1e, 0xe), at 0x68ba3
[18] 0xff324994(0xffbedc88, 0xffbeddc8, 0xa, 0xf8ca0a60, 0x6abec, 0xffbeddd4), at 0xff324993
[19] JavaCalls::call_helper(0xffbeddc0, 0xff2f3b44, 0xffbeddd0, 0x24940, 0x6abec, 0xffbeddc8), at 0xff0c9d3c
[20] JavaCalls::call(0xffbeddc0, 0xffbeddbc, 0xffbeddd0, 0x24940, 0x24f50, 0xffbedd2c), at 0xff0c99e8
[21] instanceKlass::call_class_initializer_impl(0xf8ca0a60, 0x24940, 0xf8c01c88, 0xf8ca0ad8, 0xff2f3b44, 0xffbede04), at 0xff0928ec
[22] instanceKlass::initialize_impl(0xffbedff0, 0xf8ca0ad8, 0xff2f3b44, 0x24940, 0x3, 0xf8c02f10), at 0xff090ce8
[23] instanceKlass::initialize(0xf8ca0ad8, 0x24940, 0x21da0, 0x1, 0x24940, 0xffbee07c), at 0xff08f848
[24] find_class_from_class_loader(0xf8ca0ad8, 0x249c4, 0x1, 0xffbee0e4, 0xffbee0e0, 0x1), at 0xff103e84
[25] jni_FindClass(0xf8c77100, 0x0, 0x249c4, 0x24940, 0x1124c, 0xff2f3b44), at 0xff0cf808
=>[26] JNIEnv_::FindClass(this = 0x249c4, name = 0x1124c "LoadLib"), line 758 in "jni.h"
[27] main(argc = 1, argv = 0xffbee2dc), line 52 in "simpVMtest.cpp"
0
Comment
Question by:highstar1
  • 5
  • 4
  • 2
  • +2
13 Comments
 
LVL 5

Expert Comment

by:nebeker
ID: 6960757
Did you remove the Java 1.2 installation, or is it co-existing with the 1.3 installation?  If so, is the JAVA_HOME environment variable set?

What do you get when you call:

whence java  
 -or-
which java

(depends on your shell, I think)
0
 
LVL 5

Expert Comment

by:nebeker
ID: 6960765
Also, did you recompile/rebuild your library with the header files shipped with 1.3?  I don't know if there were any changes between the 1.2 and 1.3 versions - but it might be something to check...
0
 
LVL 6

Expert Comment

by:gadio
ID: 6962030
I also think that you should rebuild your libraries again with jdk1.3 header files.
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 2

Author Comment

by:highstar1
ID: 6963154
This program is tested on freshly loaded and confiquered
Sun Ultras. These systems are only used for testing.


This program runs successfully on:
     Solaris 7
     Windows 2000
     Redhat Linux 7.2
     AIX

It Fails only on Solaris 8.

When the .so is accessed it cores.


0
 
LVL 5

Expert Comment

by:nebeker
ID: 6963278
Personally, I think it is more important to know if the .so was recompiled with the 1.3 headers than having it work as-is on those other platforms....
0
 
LVL 2

Author Comment

by:highstar1
ID: 6963329
nebeker,
I believe that it has been, but I'm going to comfirm that
it has myself. I was told that they did recompiled everything with the 1.3 headers and the latest release of compilers.
0
 
LVL 5

Expert Comment

by:nebeker
ID: 6963348
After confirming the recompile, can you also check to see if Java 1.2 is still on the Solaris 8 box?  If it is, which version of java is in your path?  (i.e. "which java" will tell you where it is coming from, and "java -version" will tell you which version is actually loading...)
0
 
LVL 2

Author Comment

by:highstar1
ID: 6977600
As I suspected they could not confirm that everything was compiled using the newer headers. I'm reloading a machine from scratch and recording every installed patch and will rebuild everything.  

The testing machines are loaded from scratch and only have JAVA 1.3 on them.

This program runs with no problems under JAVA 1.2.
I'm going to test it under JAVA 1.4 to see if the problem carries over.

I'm having more hardrive space installed on my local Sun Ultra. It will give me the ability to build everything on my local machine and eliminate some of the varables.
0
 
LVL 2

Author Comment

by:highstar1
ID: 7244846
Do to another project needing my experience in embeded avionics systems (DoD project). I have handed off this problem to someone else. I have no way to verify a solution at this time.
0
 
LVL 9

Expert Comment

by:Venci75
ID: 7972354
No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
Answered by: nebeker
Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
Venci75
EE Cleanup Volunteer
0
 
LVL 2

Author Comment

by:highstar1
ID: 7973812
Nebeker's comments didn't fix the problem.
I suspect the comments here would be useful to fixing other problems. I'm going to call over to the other office to see if they have found a fix yet.
0
 

Expert Comment

by:SpideyMod
ID: 8020572
Will return in 7 days to finalize this if it hasn't taken place.  Please leave any recommendations there before then.  Without recommendations I will PAQ with no refund.  Thanks.


SpideyMod
Community Support Moderator @Experts Exchange
0
 

Accepted Solution

by:
SpideyMod earned 0 total points
ID: 8066664
PAQ'd

SpideyMod
Community Support Moderator @Experts Exchange
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Configure a Bean in an XML file 4 42
Error in @AspectJ Based AOP with Spring 2 18
ejb stateless example 2 19
Java basic valueOf question 1 29
Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
The viewer will learn how to implement Singleton Design Pattern in Java.

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question