Debugging C++ Programm using JNI

Hi all,
I'm trying to debug a program using JNI_CreateJavaVM with gdb on Linux (JDK 1.4). If I simply run the program it works and the VM ist loaded. If I start the program inside the debugger it fails at the Create call with several messages saying
'Delayed SIGSTOP caught for LWP xxx'
where xxx is the number of the thread. The final message is:
Error occured during initialization of VM
java.lang.IllegalArgumentException: Illegal Load: NaN
and then its gone. I haven't found a way around this til now, does somebody know if debugging a native program using JNI is possible at all?
Thanks,
J-P

I know it's possible, because I do it fairly often, just not with gdb. Sorry, but I can't help you there.
God bless,
-Toby Reyelts

Similar Messages

AV when using JNI

Hi,
We have faced a problem that is very similar to the one reported in this thread:
http://forums.bea.com/bea/message.jspa?messageID=200010160&tstart=0
Has the problem been fixed in a later release?
We are using BEA JRockit 5.0 R26.4.0-63 under Windows XP Professional 32-bit SP2 and still get Access Violations when using java.lang.Class.getDeclaredMethods() or java.lang.Class.getDeclaredFields(). The exception does not occur when we use the same module with Sun JVM and MS JVM.
If the problem is supposed to be fixed, I can provide more details.
Best regards,
Alex
~~~~~~~~~~~~~~~~~~~~~

Hello Staffan,
Thanks for your reply. Here is a description of the first problem we have faced:
When using JNI to call the java.lang.Class.getDeclaredMethods() or java.lang.Class.getDeclaredFields() method, we get the java.lang.NullPointerException exception in some cases. If we debug the java.exe process in Visual Studio 2005, we can see that the following exception occurs:
First-chance exception at 0x7d612b73 in java.exe: 0xC0000005: Access violation reading location 0x00000010.
Here is a part of the exception call stack:
7d612b73()
jvm.dll!_stubsCallC2JavaStub() + 0x24 bytes
jvm.dll!_callC2Java() + 0x309 bytes
jvm.dll!_jniCheckExceptionsForCall() + 0x12e bytes
jvm.dll!_jniCallObjectMethodA@16() + 0x3b bytes
jvm.dll!_jniGetVersion@4() + 0x993 bytes
tcJavaHook.dll!JNIEnv_::CallObjectMethodA(_jobject * obj=0x34960204, _jmethodID * methodID=0x77b84b08, const jvalue * args=0x00000000) Line 879 + 0x1f bytes C++
We have done some investigations and found out that the problem occurs for the following classes:
java.lang.Class, javax.swing.JPanel, javax.swing.JLayeredPane, javax.swing.JToolBar, javax.swing.AbstractButton, javax.swing.JLabel,
javax.swing.JScrollPane, javax.swing.JViewport, javax.swing.JTable, javax.swing.CellRendererPane, javax.swing.JScrollBar, javax.swing.table.JTableHeader, javax.swing.JMenuBar, javax.swing.JComboBox, javax.swing.JSpinner, javax.swing.text.JTextComponent
While the exception does not occur when calling methods of the following classes:
javax.swing.JFrame, java.awt.Frame, javax.swing.JComponent, javax.swing.JRootPane, java.lang.Object, java.awt.Component, java.awt.Container, java.awt.Window, java.awt.Dialog, javax.swing.JDialog
We were able to reproduce the problem with Eclipse 3.1.2 launched in the following way:
I:\Java\jrockit-R26.4.0-jdk1.5.0_06\jre\bin\java.exe -Xms40m -Xmx256m -jar D:\Eclipse\startup.jar -os win32 -ws win32 -arch x86 -launcher D:\Eclipse\eclipse.exe -name Eclipse -showsplash 600 -exitdata 14a8_60 -vm I:\Java\jrockit-R26.4.0-jdk1.5.0_06\jre\bin\java.exe -vmargs -Xms40m -Xmx256m -jar D:\Eclipse\startup.jar
I:\Java\jrockit-R26.4.0-jdk1.5.0_06\ - the installation folder of JRockit JDK
D:\Eclipse\ - the root folder of Eclipse
In this case, even trying to get information about the java.lang.Object class fields and methods causes the problem.
Can you say anything based on the above call stack?
Please let me know if you need any details about the problem.
Best regards,
Alex
~~~~~~~~~~~~~~~~~~~~~

I switched on my PC and there was an update for realplayer. Since then firefox will not load. It is running according to Task Manager. I've downloaded a another copy of the programme using IE but whilst it loaded as a programme, does not open a window.

I switched on my PC and there was an update for realplayer. Since then firefox will not open as a window. It is running according to Task Manager. I've downloaded a another copy of the programme using IE but whilst it loaded as a programme, does not open a window.

Hi again,
Helps if I give the correct link ! <br/>The press shift button appears to still work, but the option to start in safe mode from the programs listing of a standard install I do not think exists anymore.
Safe mode will start from a command line, (or a shortcut) and in some circumstances you may need to enter the full path name on a command or shortcut detailed instructions are at http://kb.mozillazine.org/Safe_mode
Remember (at least at this stage) do not make changes when you get the options list, just click on the continue button.
If you think that RealPlayer is causing the problem you could uninstall that for now.
Firefox recent versions are 3.6 4.0 (and 5.0 in beta). There is some debate as to whether creating new profiles or re-installing Firefox is the simplest method of troubleshooting and solving some of these problems, personally I use multiple profiles and multiple versions of Firefox, and tend to forget the required procedures are less than straightforward. For now at least try [[safe mode]] again.
* see also Instructions for [[installing a previous version of firefox]]

How can i call a VB6 project from my java application using JNI

hi
can anyone tell me the procedure of calling a VB6 project from any java application using JNI
if anyone does know then tell me the detail procedure of doing that. I know that i have to create a dll of that VB6 project then to call it from the java application.
if anyone know that procedure of creating dll file of an existing VB6 project please reply
please if anyone know then let me know

Ahh, kind of a duplicate thread:
http://forums.java.sun.com/thread.jspa?threadID=631642
@OP. You could have clarified your original post and the relationship of your question to java. You did not need a new thread.
� {�

JVM Crash When Using JNI and COM

I'm trying to call a DLL compiled from VB6 source code that I do not have access to. The VB6 code simply retrieves data from a DB2 database using ADO and my client code grabs that data and marshals it to my Java code. I'm attempting to achieve this using JNI and COM (without a third-party bridge). It works 75% of the time, but the other 25% of the time, the JVM crashes with the usual Hotspot crash log containing an access violation exception. However, I don't know what in my C++ code (VC++ 8) could be causing this except for passing a "wild" pointer to the code lying underneath the COM object interface. If that is the case, I don't know how I am doing that.
The Java code that is calling my native method is running on Tomcat 5.5.25 and just to be safe, I am not allowing multiple threads to concurrently call the method in my JNI DLL (though I realize that this will kill performance). Once I can get past this problem, I'll do the COM interfacing on a worker thread in my native code so I don't screw up CoInitialize and CoUninitialize calls in the case the same thread is concurrently executing multiple calls to my native code.
I've noticed that in most cases, the JVM crashes during my call to the pClsAccount->OpenConnection method. However, my DLL isn't what is listed on the top of the call stack, which is why I suspect the passing of a wild pointer, though I'm just taking a guess at that. Does anyone have an idea as to what's going on ?
JNIEXPORT jobject JNICALL Java_CustomerInfo_nGetCustomerAccountInfo(JNIEnv *env, jobject customerInfo, jstring accountNumber, jstring iniFileName)
jboolean isCopy;
// Account info class and instance to be instantiated
jclass accountInfoCls = NULL;
jobject accountInfoObj = NULL;
// The constructor ID of the accountInfoCls
jmethodID ctorID = NULL;
// Pointer to the interface for the ClsAccount COM object
_clsAccount *pClsAccount = NULL;
HRESULT hr;
BSTR bstrIniFileName(L"");
try
const char *nativeAccountNumber = NULL;
if (accountNumber != NULL)
nativeAccountNumber = env->GetStringUTFChars(accountNumber, &isCopy);
else
jclass newExcCls;
env->ExceptionDescribe();
env->ExceptionClear();
newExcCls = env->FindClass("java/lang/IllegalArgumentException");
env->ThrowNew(newExcCls, "accountNumber passed in was null !");
return NULL;
// Initialization
variantt varConnectionSucceeded = variantt(false);
variantt varGetAccountInfoSucceeded = variantt(false);
variantt varAccountNumber = variantt(nativeAccountNumber);
bstrt bstrLastPaymentDate = bstrt();
bstrt bstrLastErrorMessage = bstrt();
bstrt bstrLastErrorNumber = bstrt();
jlong jTotalDue = NULL;
jlong jEstablishedDueDay = NULL;
jlong jLastPaymentAmount = NULL;
jstring jLastPaymentDate = NULL;
jstring jLastErrorMessage = NULL;
jstring jLastErrorNumber = NULL;
jthrowable jException = NULL;
const char *chLastPaymentDate = NULL;
const char *chLastErrorMessage = NULL;
const char *chLastErrorNumber = NULL;
long long totalDue;
long long lastPaymentAmount;
long establishedDueDateDay;
//Convert string from Java string to C string to VB string
const char *nativeIniFileName = NULL;
if (iniFileName != NULL)
nativeIniFileName = env->GetStringUTFChars(iniFileName, &isCopy);
else
jclass newExcCls;
env->ExceptionDescribe();
env->ExceptionClear();
newExcCls = env->FindClass("java/lang/IllegalArgumentException");
env->ThrowNew(newExcCls, "iniFileName passed in was null");
return NULL;
bstrIniFileName = comutil::ConvertStringToBSTR(nativeIniFileName);
CoInitialize(NULL);
// Create an instance of the COClass with the interface over it
hr = CoCreateInstance(__uuidof(clsAccount), NULL, CLSCTX_INPROC_SERVER, __uuidof(_clsAccount), (void **)&pClsAccount);
if (hr == S_OK)
varConnectionSucceeded.boolVal = pClsAccount->OpenConnection(&bstrIniFileName);
　
if (varConnectionSucceeded.boolVal == -1)
varGetAccountInfoSucceeded.boolVal = pClsAccount->GetAccountPaymentInformation(&(varAccountNumber.GetVARIANT()));
env->ReleaseStringUTFChars(accountNumber, nativeAccountNumber);
// Extract all available account information from the ClsAccount object
if (varGetAccountInfoSucceeded.boolVal == -1)
totalDue = pClsAccount->TotalDue.int64;
establishedDueDateDay = pClsAccount->EstablishedDueDateDay;
lastPaymentAmount = pClsAccount->LastPaymentAmount.int64;
bstrLastPaymentDate = pClsAccount->LastPaymentDate;
chLastPaymentDate = comutil::ConvertBSTRToString(bstrLastPaymentDate.GetBSTR());
jTotalDue = (jlong)totalDue;
jEstablishedDueDay = (jlong)establishedDueDateDay;
jLastPaymentAmount = (jlong)lastPaymentAmount;
jLastPaymentDate = env->NewStringUTF(chLastPaymentDate);
delete[] chLastPaymentDate;
pClsAccount->CloseConnection();
// Populate error fields if any errors occur
bstrLastErrorMessage = pClsAccount->LastErrMessage;
chLastErrorMessage = comutil::ConvertBSTRToString(bstrLastErrorMessage.GetBSTR());
bstrLastErrorNumber = pClsAccount->LastErrNumber;
chLastErrorNumber = comutil::ConvertBSTRToString(bstrLastErrorNumber.GetBSTR());
jLastErrorMessage = env->NewStringUTF(chLastErrorMessage);
jLastErrorNumber = env->NewStringUTF(chLastErrorNumber);
delete[] chLastErrorMessage;
delete[] chLastErrorNumber;
const char* clsName = "com/nuance/merchantsmutual/businessentities/CustomerAccountInfo";
// Find the Java class and the ID of its constructor
accountInfoCls = env->FindClass(clsName);
ctorID = env->GetMethodID(accountInfoCls, "<init>", "(JJJLjava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
jException = env->ExceptionOccurred();
if (jException != NULL)
env->ExceptionDescribe();
env->ExceptionClear();
//Release all resources associated with the ClsAccount instance
pClsAccount->Release();
//Instantiate the class with the given parameters
accountInfoObj = env->NewObject(accountInfoCls, ctorID, jTotalDue, jEstablishedDueDay, jLastPaymentAmount, jLastPaymentDate, jLastErrorMessage, jLastErrorNumber);
jException = env->ExceptionOccurred();
if (jException != NULL)
env->ExceptionDescribe();
env->ExceptionClear();
else if (hr == REGDB_E_CLASSNOTREG)
cout << "COM class not registered" << endl;
else if ( hr == CLASS_E_NOAGGREGATION)
cout << "COM class can't be aggregated" << endl;
else if (hr == E_NOINTERFACE)
cout << "No interface for COM class clsAccount" << endl;
else if (hr == E_POINTER)
cout << "*ppv pointer was NULL !" << endl;
else
cout << "Error occurred while creating COM object. HR is [" << hr << "]" << endl;
// Free the BSTR because a new one was returned with a call to comutil::ConvertStringToBSTR
SysFreeString(bstrIniFileName);
// Release the string when it's no longer needed. MUST call if string won't be used
// anymore or else a memory leak will occur
env->ReleaseStringUTFChars(iniFileName, nativeIniFileName);
CoUninitialize();
　
catch (_com_error &e)
cout << "Encountered an exception in GetCustomerAccountInfo: Error was " << e.ErrorMessage();
pClsAccount->Release();
catch (...)
pClsAccount->Release();
return accountInfoObj;
Edited by: Cthulhu76 on Jan 5, 2010 9:18 AM

0x49202400 JavaThread "ContainerBackgroundProcessor[StandardEngine[Catalina]]" daemon [_thread_blocked, id=5340, stack(0x49bf0000,0x49c40000)]
0x48a7e800 JavaThread "Thread-1" [_thread_in_native, id=5976, stack(0x48f00000,0x48f50000)]
0x48a0dc00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3072, stack(0x48c60000,0x48cb0000)]
0x48a09000 JavaThread "CompilerThread0" daemon [_thread_blocked, id=4988, stack(0x48c10000,0x48c60000)]
0x48a07c00 JavaThread "Attach Listener" daemon [_thread_blocked, id=3124, stack(0x48bc0000,0x48c10000)]
0x48a07000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=2572, stack(0x48b70000,0x48bc0000)]
0x489f5c00 JavaThread "Finalizer" daemon [_thread_blocked, id=5752, stack(0x48b20000,0x48b70000)]
0x489f4c00 JavaThread "Reference Handler" daemon [_thread_blocked, id=2596, stack(0x48ad0000,0x48b20000)]
0x003c6000 JavaThread "main" [_thread_in_native, id=4252, stack(0x00820000,0x00870000)]
Other Threads:
0x489f0400 VMThread [stack: 0x48a80000,0x48ad0000] [id=5624]
0x48a18800 WatcherThread [stack: 0x48cb0000,0x48d00000] [id=1192]
VM state:not at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation total 36288K, used 12762K [0x02940000, 0x050a0000, 0x07800000)
eden space 32256K, 34% used [0x02940000, 0x0343af58, 0x048c0000)
from space 4032K, 37% used [0x04cb0000, 0x04e2ba28, 0x050a0000)
to space 4032K, 0% used [0x048c0000, 0x048c0000, 0x04cb0000)
tenured generation total 483968K, used 7518K [0x07800000, 0x250a0000, 0x42940000)
the space 483968K, 1% used [0x07800000, 0x07f57958, 0x07f57a00, 0x250a0000)
compacting perm gen total 14080K, used 14016K [0x42940000, 0x43700000, 0x46940000)
the space 14080K, 99% used [0x42940000, 0x436f0320, 0x436f0400, 0x43700000)
No shared spaces configured.
Dynamic libraries:
0x00400000 - 0x0040f000      C:\Program Files\Apache Software Foundation\Tomcat 5.5\bin\tomcat5.exe
0x7c800000 - 0x7c8c0000      C:\WINDOWS\system32\ntdll.dll
0x77e40000 - 0x77f42000      C:\WINDOWS\system32\kernel32.dll
0x77380000 - 0x77411000      C:\WINDOWS\system32\USER32.dll
0x77c00000 - 0x77c48000      C:\WINDOWS\system32\GDI32.dll
0x77f50000 - 0x77feb000      C:\WINDOWS\system32\ADVAPI32.dll
0x77c50000 - 0x77cef000      C:\WINDOWS\system32\RPCRT4.dll
0x76f50000 - 0x76f63000      C:\WINDOWS\system32\Secur32.dll
0x77ba0000 - 0x77bfa000      C:\WINDOWS\system32\MSVCRT.dll
0x7c8d0000 - 0x7d0cf000      C:\WINDOWS\system32\SHELL32.dll
0x77da0000 - 0x77df2000      C:\WINDOWS\system32\SHLWAPI.dll
0x76290000 - 0x762ad000      C:\WINDOWS\system32\IMM32.DLL
0x77420000 - 0x77523000      C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.3790.3959_x-ww_D8713E55\comctl32.dll
0x6d7c0000 - 0x6da10000      C:\Program Files\Java\jre1.6.0_07\bin\client\jvm.dll
0x76aa0000 - 0x76acd000      C:\WINDOWS\system32\WINMM.dll
0x7c340000 - 0x7c396000      C:\WINDOWS\system32\MSVCR71.dll
0x6d270000 - 0x6d278000      C:\Program Files\Java\jre1.6.0_07\bin\hpi.dll
0x76b70000 - 0x76b7b000      C:\WINDOWS\system32\PSAPI.DLL
0x6d770000 - 0x6d77c000      C:\Program Files\Java\jre1.6.0_07\bin\verify.dll
0x6d310000 - 0x6d32f000      C:\Program Files\Java\jre1.6.0_07\bin\java.dll
0x6d7b0000 - 0x6d7bf000      C:\Program Files\Java\jre1.6.0_07\bin\zip.dll
0x6d570000 - 0x6d583000      C:\Program Files\Java\jre1.6.0_07\bin\net.dll
0x71c00000 - 0x71c17000      C:\WINDOWS\system32\WS2_32.dll
0x71bf0000 - 0x71bf8000      C:\WINDOWS\system32\WS2HELP.dll
0x71b20000 - 0x71b61000      C:\WINDOWS\system32\mswsock.dll
0x5f270000 - 0x5f2ca000      C:\WINDOWS\system32\hnetcfg.dll
0x71ae0000 - 0x71ae8000      C:\WINDOWS\System32\wshtcpip.dll
0x76ed0000 - 0x76efa000      C:\WINDOWS\system32\DNSAPI.dll
0x76f70000 - 0x76f77000      C:\WINDOWS\System32\winrnr.dll
0x76f10000 - 0x76f3e000      C:\WINDOWS\system32\WLDAP32.dll
0x76f80000 - 0x76f85000      C:\WINDOWS\system32\rasadhlp.dll
0x4a6a0000 - 0x4a6ac000      C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\MMI\WEB-INF\lib\CustomerInfoProxy.dll
0x77670000 - 0x777a9000      C:\WINDOWS\system32\ole32.dll
0x77d00000 - 0x77d8b000      C:\WINDOWS\system32\OLEAUT32.dll
0x7c420000 - 0x7c4a7000      C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.4053_x-ww_E6967989\MSVCP80.dll
0x78130000 - 0x781cb000      C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.4053_x-ww_E6967989\MSVCR80.dll
0x777b0000 - 0x77833000      C:\WINDOWS\system32\CLBCatQ.DLL
0x77010000 - 0x770d6000      C:\WINDOWS\system32\COMRes.dll
0x77b90000 - 0x77b98000      C:\WINDOWS\system32\VERSION.dll
0x75da0000 - 0x75e5d000      C:\WINDOWS\system32\SXS.DLL
0x75e60000 - 0x75e87000      C:\WINDOWS\system32\apphelp.dll
0x4dc30000 - 0x4dc5e000      C:\WINDOWS\system32\msctfime.ime
0x4b0d0000 - 0x4b395000      C:\WINDOWS\system32\xpsp2res.dll
0x71bb0000 - 0x71bb9000      C:\WINDOWS\system32\WSOCK32.dll
0x4bbe0000 - 0x4bbea000      C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\MMI\WEB-INF\lib\ClearTranProxy.dll
0x745e0000 - 0x7489e000      C:\WINDOWS\system32\msi.dll
0x71c40000 - 0x71c97000      C:\WINDOWS\system32\NETAPI32.dll
0x4bc50000 - 0x4bc6c000      C:\WINDOWS\system32\DBNETLIB.DLL
0x71f60000 - 0x71f64000      C:\WINDOWS\system32\security.dll
0x76c90000 - 0x76cb7000      C:\WINDOWS\system32\msv1_0.dll
0x76cf0000 - 0x76d0a000      C:\WINDOWS\system32\iphlpapi.dll
0x761b0000 - 0x76243000      C:\WINDOWS\system32\crypt32.dll
0x76190000 - 0x761a2000      C:\WINDOWS\system32\MSASN1.dll
0x4bcf0000 - 0x4bcff000      C:\Program Files\Common Files\System\Ole DB\SQLOLEDB.RLL
0x4a8a0000 - 0x4a8aa000      C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\MMI\WEB-INF\lib\MIGI.DLL
0x73570000 - 0x736c2000      C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\MMI\WEB-INF\lib\MSVBVM60.DLL
0x4a950000 - 0x4a9e2000      C:\Program Files\Common Files\System\ado\msado15.dll
0x74a50000 - 0x74a6a000      C:\WINDOWS\system32\MSDART.DLL
0x4c850000 - 0x4c8c9000      C:\Program Files\Common Files\System\Ole DB\oledb32.dll
0x4dbb0000 - 0x4dbc1000      C:\Program Files\Common Files\System\Ole DB\OLEDB32R.DLL
VM Arguments:
jvm_args: -Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat 5.5 -Dcatalina.base=C:\Program Files\Apache Software Foundation\Tomcat 5.5 -Djava.endorsed.dirs=C:\Program Files\Apache Software Foundation\Tomcat 5.5\common\endorsed -Djava.io.tmpdir=C:\Program Files\Apache Software Foundation\Tomcat 5.5\temp -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=C:\Program Files\Apache Software Foundation\Tomcat 5.5\conf\logging.properties -Djava.library.path=C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\MMI\WEB-INF\lib vfprintf -Xms512m -Xmx1024m
java_command: <unknown>
Launcher Type: generic
Environment Variables:
JAVA_HOME=C:\Program Files\Java\jdk1.6.0_07
[error occurred during error reporting (printing environment variables), id 0xc0000005]
--------------- S Y S T E M ---------------
OS: Windows Server 2003 family Build 3790 Service Pack 2
CPU:total 4 (4 cores per cpu, 1 threads per core) family 6 model 7 stepping 6, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3
Memory: 4k page, physical 2097151k(2097151k free), swap 4194303k(4194303k free)
vm_info: Java HotSpot(TM) Client VM (10.0-b23) for windows-x86 JRE (1.6.0_07-b06), built on Jun 10 2008 01:14:11 by "java_re" with MS VC++ 7.1
time: Mon Dec 28 15:24:00 2009
elapsed time: 600 seconds

Deploying a WAR file containing .jsp and servlets (also uses JNI)

Deploying a WAR file containing .jsp and servlets (also uses JNI) on Windows 2000
We had problems making it initially work on Sun ONE Web Server 6.0 Service Pack 1 because of lack of good iPlanet Web
Server documentation on deploying such files.
This is how we went about it:
1) Make one of the servlet and JSP (must call another Java Class) web application (.war) examples work with iPlanet Web
Server.
C:\iPlanet\Servers\plugins\servlets\examples\web-apps\HelloWorld\HelloWorld.war
and
C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
a) Go to your Web Server Administration to deploy the application using GUI Web Application Deploy.
(We usually use command line, we experienced some issues with the GUI version, but maybe it is fixed in the new Web Server
service packs)
From browser, open http://yourserver:8888/
Click on Select a Server:Manage
Click on Virtual Server Class
Click on https-yourserver
Click on the Web Applications Tab
Then, click on Deploy Web Application
Enter the following -
WAR File On: Local
WAR File Path: C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
Application URI: /jakarta
Installation Directory: c:\iPlanet\examples\jakarta-examples
By clicking on OK it deployed the application.
I can verify that it is deployed by selecting "Edit Web Applications" and I see the following entry:
Edit     /jakarta     c:/iPlanet/examples/jakarta-examples
Also, c:/iPlanet/examples/jakarta-examples should have the similar following directory structure ..
- [images]
- [jsp]
- index.html
- [servlets]
- [META-INF]
- [WEB-INF]
- [classes]
- [tlds]
- web.xml
- index.html
I restarted the server and accessed it using the following URL from my IE browser:
http://yourserver/jakarta/index.html
Then I clicked on the JSP Examples and tried some JSP examples.
b) Alternatively, you can also deploy the same example from the command-line.
Make sure C:\iPlanet\Servers\bin\https\httpadmin\bin\ is in your path
wdeploy deploy      -u /jakarta
          -i yourserver
          -v https-yourserver
          -d c:\iplanet\examples\jakarta-examples
          C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
Restart the web server (I don't think you have to restart, but .. might as well).
2)Deploy your web-application
My Foo.war has the following structure.
You can use jar tf Foo.war to look at the file contents from command line (assuming you have JDK installed and the bin is
in your PATH)
Foo.war
- [META-INF]
- [WEB-INF]
- web.xml
- [classes]
- Bar.class
- MoServlet.class
- [lib]
- ThirdParty.jar
- [natlib]
- extlib.dll
- foo.jsp
Here is our application scenario:
foo.jsp uses a class call Bar (it is not in any package). The Bar java class uses classes from ThirdParty.jar. The
ThirdParty.jar in turn uses JNI to load library extlib.dll. foo.jsp also calls /servlet/Mo as well.
Now to deploy it, do the following:
(a) Make sure that within foo.jsp, you import the Bar class ( I don't know why you have to do it, but if you don't you get
JSP compile error).
<%@page language="java" import="Bar" contentType="text/html"%>
(b) Check web.xml (for Servlets)
Within web.xml, make sure you have the following mappings:
<servlet>
<servlet-name> MoLink </servlet-name>
<servlet-class> MoServlet </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> MoLink </servlet-name>
<url-pattern> /servlet/Mo </url-pattern>
</servlet-mapping>
(c) Deploy the application
Using command line:
wdeploy deploy      -u /foo
          -i yourserver
          -v https-yourserver
          -d c:\iplanet\examples\foo-dir
          Foo.war
(d) Change web-apps.xml file (for picking up ThirdParty.jar)
It is located in
C:\iPlanet\Servers\https-yourserver\config
You should see something similar to following after successful deployment.
<web-app uri="/foo" dir="C:\iPlanet\examples\foo-dir" enable="true"/>
Change it to look like following to pick up the ThirdParty.jar
<web-app uri="/foo" dir="C:\iPlanet\examples\foo-dir" enable="true">
<class-loader reload-interval="300"
          classpath="C:/iPlanet/examples/foo-dir/WEB-INF/lib/ThirdParty.jar"
          delegate="false"/>
</web-app>
(e) Change jvm12.conf file (for JNI)
It is located in
C:\iPlanet\Servers\https-yourserver\config
Add or uncomment the following lines:
#optional - just helps with instrumenting the jsp and servlet code
jvm.include.CLASSPATH=1
jvm.enableDebug=1
nes.jsp.enabledebug=1
jvm.trace=7
jvm.verboseMode=1
#required for JNI
java.compiler=NONE
jvm.classpath=.;C:\JDK1.3.1\lib\tools.jar;C:/iPlanet/Servers/plugins/servlets/examples/legacy/beans.10/SDKBeans10.jar;
jvm.option=-Xrs
jvm.option=-Xnoagent
# not sure if this is needed for iPlanet web server
jvm.option=-Djava.library.path=C:/iPlanet/examples/foo-dir/natlib/ -Djava.compiler=NONE
(f) Change magnus.conf file (for JNI)
We HAD to change this file in order for ThirdParty.jar file to pick up the native C++ code using JNI. Apparently, the
iPlanet Web Server doesn't pick the Environment Variable Path. Because when we had the directory containing the DLL just
in Path, it didn't work.
Change Extrapath directive:
ExtraPath C:/iPlanet/Servers/bin/https/bin;${NSES_JRE_RUNTIME_LIBPATH}
to
ExtraPath c:/iPlanet/examples/foo-dir/natlib;C:/iPlanet/Servers/bin/https/bin;${NSES_JRE_RUNTIME_LIBPATH}
(g) Apply changes from the Web Server Administration Console and Restart the web server.
You should be able to see the behaviour that you want from your application.
http://yourserver/foo/foo.jsp
Hope this was helpful!!!
Sonu

Deploying a WAR file containing .jsp and servlets (also uses JNI) on Windows 2000
We had problems making it initially work on Sun ONE Web Server 6.0 Service Pack 1 because of lack of good iPlanet Web
Server documentation on deploying such files.
This is how we went about it:
1) Make one of the servlet and JSP (must call another Java Class) web application (.war) examples work with iPlanet Web
Server.
C:\iPlanet\Servers\plugins\servlets\examples\web-apps\HelloWorld\HelloWorld.war
and
C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
a) Go to your Web Server Administration to deploy the application using GUI Web Application Deploy.
(We usually use command line, we experienced some issues with the GUI version, but maybe it is fixed in the new Web Server
service packs)
From browser, open http://yourserver:8888/
Click on Select a Server:Manage
Click on Virtual Server Class
Click on https-yourserver
Click on the Web Applications Tab
Then, click on Deploy Web Application
Enter the following -
WAR File On: Local
WAR File Path: C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
Application URI: /jakarta
Installation Directory: c:\iPlanet\examples\jakarta-examples
By clicking on OK it deployed the application.
I can verify that it is deployed by selecting "Edit Web Applications" and I see the following entry:
Edit     /jakarta     c:/iPlanet/examples/jakarta-examples
Also, c:/iPlanet/examples/jakarta-examples should have the similar following directory structure ..
- [images]
- [jsp]
- index.html
- [servlets]
- [META-INF]
- [WEB-INF]
- [classes]
- [tlds]
- web.xml
- index.html
I restarted the server and accessed it using the following URL from my IE browser:
http://yourserver/jakarta/index.html
Then I clicked on the JSP Examples and tried some JSP examples.
b) Alternatively, you can also deploy the same example from the command-line.
Make sure C:\iPlanet\Servers\bin\https\httpadmin\bin\ is in your path
wdeploy deploy      -u /jakarta
          -i yourserver
          -v https-yourserver
          -d c:\iplanet\examples\jakarta-examples
          C:\iPlanet\Servers\plugins\servlets\examples\web-apps\jakarta-examples\jarkarta-examples.war
Restart the web server (I don't think you have to restart, but .. might as well).
2)Deploy your web-application
My Foo.war has the following structure.
You can use jar tf Foo.war to look at the file contents from command line (assuming you have JDK installed and the bin is
in your PATH)
Foo.war
- [META-INF]
- [WEB-INF]
- web.xml
- [classes]
- Bar.class
- MoServlet.class
- [lib]
- ThirdParty.jar
- [natlib]
- extlib.dll
- foo.jsp
Here is our application scenario:
foo.jsp uses a class call Bar (it is not in any package). The Bar java class uses classes from ThirdParty.jar. The
ThirdParty.jar in turn uses JNI to load library extlib.dll. foo.jsp also calls /servlet/Mo as well.
Now to deploy it, do the following:
(a) Make sure that within foo.jsp, you import the Bar class ( I don't know why you have to do it, but if you don't you get
JSP compile error).
<%@page language="java" import="Bar" contentType="text/html"%>
(b) Check web.xml (for Servlets)
Within web.xml, make sure you have the following mappings:
<servlet>
<servlet-name> MoLink </servlet-name>
<servlet-class> MoServlet </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> MoLink </servlet-name>
<url-pattern> /servlet/Mo </url-pattern>
</servlet-mapping>
(c) Deploy the application
Using command line:
wdeploy deploy      -u /foo
          -i yourserver
          -v https-yourserver
          -d c:\iplanet\examples\foo-dir
          Foo.war
(d) Change web-apps.xml file (for picking up ThirdParty.jar)
It is located in
C:\iPlanet\Servers\https-yourserver\config
You should see something similar to following after successful deployment.
<web-app uri="/foo" dir="C:\iPlanet\examples\foo-dir" enable="true"/>
Change it to look like following to pick up the ThirdParty.jar
<web-app uri="/foo" dir="C:\iPlanet\examples\foo-dir" enable="true">
<class-loader reload-interval="300"
          classpath="C:/iPlanet/examples/foo-dir/WEB-INF/lib/ThirdParty.jar"
          delegate="false"/>
</web-app>
(e) Change jvm12.conf file (for JNI)
It is located in
C:\iPlanet\Servers\https-yourserver\config
Add or uncomment the following lines:
#optional - just helps with instrumenting the jsp and servlet code
jvm.include.CLASSPATH=1
jvm.enableDebug=1
nes.jsp.enabledebug=1
jvm.trace=7
jvm.verboseMode=1
#required for JNI
java.compiler=NONE
jvm.classpath=.;C:\JDK1.3.1\lib\tools.jar;C:/iPlanet/Servers/plugins/servlets/examples/legacy/beans.10/SDKBeans10.jar;
jvm.option=-Xrs
jvm.option=-Xnoagent
# not sure if this is needed for iPlanet web server
jvm.option=-Djava.library.path=C:/iPlanet/examples/foo-dir/natlib/ -Djava.compiler=NONE
(f) Change magnus.conf file (for JNI)
We HAD to change this file in order for ThirdParty.jar file to pick up the native C++ code using JNI. Apparently, the
iPlanet Web Server doesn't pick the Environment Variable Path. Because when we had the directory containing the DLL just
in Path, it didn't work.
Change Extrapath directive:
ExtraPath C:/iPlanet/Servers/bin/https/bin;${NSES_JRE_RUNTIME_LIBPATH}
to
ExtraPath c:/iPlanet/examples/foo-dir/natlib;C:/iPlanet/Servers/bin/https/bin;${NSES_JRE_RUNTIME_LIBPATH}
(g) Apply changes from the Web Server Administration Console and Restart the web server.
You should be able to see the behaviour that you want from your application.
http://yourserver/foo/foo.jsp
Hope this was helpful!!!
Sonu

Call to a C++ DLL, using JNI - C++ method has char*

I am trying to link into an existing C++ Dynamically Linked Library(DLL) using the Java Native Interface(JNI).
All goes fine, and the library loads into the current program, however when I try to call the function, it crashes. The function has char pointers, and I haven;t been able to get Java to simulate them. Is there a way?????
I have tried using and array of chars .....char[], and String, but no dice.
Any suggestions O'learned Java ones??

It will be necessary for you to write a JNI adapter in C/C++ to accomplish this. Java character strings and arrays are very different from those of C/C++ and you'll have to use JNI functions to adapt.
Chuck

Calling C++ DLL's Using JNI

I have a question.. I need to call few C++ DLL methods from java. So I planned use JNI to do that. The question is there any probable or known performance issues if tried to call DLL's from java application. And also I also appreciate If you can you please send me a link where I can find a sample code for running DLL's using Java application
Note: I know I dont have any control on performance issues with DLL's

look at http://staff.develop.com/halloway/code/jawin.html

Trouble using JNI

Hi everyone
I have a problem, with a class which has native functions(JNI).
The application I�m developing, uses thread�s. At the beginning before thread starts his job, application calls a native function without problem. But when another thread calls another native function(same class) generates the next error :
java.lang.UnsatisfiedLinkError: estarEnEjecucion
at MemoriaCompartida.estarEnEjecucion(Native Method)
at MemoriaCompartida.estarEnEjecucion(MemoriaCompartida.java:72)
at Censor.timerIntervalo(Censor.java:82)
at Timer.run(Timer.java:225)
at java.lang.Thread.run(Thread.java:534)
What seems to be the problem???
Thanks a lot for your help

First of all,
when I use JNI, I like to put the System.loadLibrary() on a static method in the first class I know will be loaded.
like this:
static {
System.loadLibrary("Name");
}So I know that Library was succesfuly loaded.
Anyway, I bet that your library do NOT have the method you are trying to access, or maybe is missing parameters!
Check it!
If I didn't helped, please put the call of the methods in the java file and the library, if you can.
Cya...
Message was edited by:
pbulgarelli
Message was edited by:
pbulgarelli

Using JNI with RMI/EJB.

Hi,
I am using JNI to interface with a c application.
The problem is that c application is thread safe.
Since i need to use this interface from RMI/EJB,
multiple calls will be made simultaneosly on the
c application.
Will anyone tell me how do i handle this scenario?
Thanks in Advance.
Robin

Is the ejb expect immediate result from the c application?
If yes, I don't know. Perhaps you need to redesign your business logic so it will not expect immediate result from c.
If no, then make a layer between the ejb and c. The layer would be message queuer application with JMS receiver. EJB will send JMS to the JMS receiver when it needs to execute c. You can queue the message so c application is executed without overlap. If the EJB expect the result from c, then the queuer can send it back using JMS.

How to use jni with ervlets

Hi
i was trying to do some example with JNI. I can use JNI with standalone Java application but I just cannot figure out how I can use JNI with Servlet.
Can some one show me a sample code using JNI with Servlets.
thanks very much

JNI is done in servlets that same way as other java.
I suspect your problem is in the environment and perhaps how servlets work. It doesn't have anything to do with JNI itself.

How to use JNI with Servlets

Hi
i was trying to do some example with JNI. I can use JNI with standalone Java application but I just cannot figure out how I can use JNI with Servlet.
Can some one show me a sample code using JNI with Servlets.
thanks very much

hi,
I am also facing the same problem,
when I am using JNI with stand alone application it works fine but when i tried to use it with a servlet It gives unsatisfied linker error
stack: java.lang.UnsatisfiedLinkError: createSocket
     at RelayConnector.createSocket(Native Method)
     at RelayServlet.doGet(RelayServlet.java:70)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.server.http.servlet.NSServletRunner.invokeServletService(NSServletRunner.java:891)
     at com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java:458)
It seems i have to do some path settings in my iplenet web server.
If some one have faced the problem i would be glad to know the solution for this, i am literally bugged up,....

Question using jni

Hi,
This is the first time I use jni and I encountered some problem when trying to accessing instance fields. My source code is as follows:
java side:
class C {
int j;
private native void f();
static { System.loadLibrary("C"); }
public static void main(String[] args)
C c = new C();
c.j = 5;
System.out.println("Before calling: " + c.j);
c.f();
System.out.println("After calling: " + c.j);
native (c) side:
#include <stdio.h>
#include "C.h"
JNIEXPORT void JNICALL Java_C_f(JNIEnv *env, jobject obj)
jfieldID fid;
jclass cls = (*env)->GetObjectClass(env, obj);
fid = (*env)->GetFieldID(env, cls, "j", "I");
if (fid == 0) {
return;
printf("Before set: %d\n", (*env)->GetIntField(env, cls, fid));
(*env)->SetIntField(env, cls, fid, 100);
printf("After set: %d\n", (*env)->GetIntField(env, cls, fid));
The programs compile and run smoothly, but the result is not what I expect. Please see the result below:
jason1:~/jni/accessInstanceVar> make
javac C.java
javah -jni C
gcc \
-I/usr/lib/jdk1.1/include \
-I/usr/lib/jdk1.1/include/linux \
Java_C_f.c -c -o libC.o
gcc -shared -o libC.so libC.o
java C
Before calling: 5
Before set: 196653
After set: 100
After calling: 5
I don't know why the value of the instance variable is not 5 when first accessed in the native function and why it is still 5 after the native function returns.
Can someone help me? Thanks in advance!
Yong

It looks to me like you try to set a value of an instance variable like a static varibale.
I think you need exatra information like the object which the instance variable like so:
(*env)->SetIntField(env, obj, fid, 100);;
instead of
(*env)->SetIntField(env, cls, fid, 100);
Hope this will help
Joeseph.

How to use JNI in an Applet?

Can a native method can be invoken in an Applet?If it can,which knowledge of Java should be used and how to use it?

You could I suppose if yo sign the applet (which, if the user accepts it, will allow it to use features otherwise not available to an applet because of the secure sandbox). However, I am not sure how you would deploy the necessary native library since it must be available to the native OS loader (ie, a file on the client machine). If you are deploying the applets (see WebStart perhaps) you could do it.
But generally it is a poor idea to try to use JNI in an Applet, and this is probably something that you would not want to use outside of an intranet environment.
Chuck

Segmentation fault when using jni application

Hi I have a segmentation fault whe i use jni with a c++ program, i don't know how to read hs_err_pid....log, can someone help me to analyse this file
# An unexpected error has been detected by HotSpot Virtual Machine:
# SIGSEGV (0xb) at pc=0x9704e824, pid=15092, tid=2983283632
# Java VM: Java HotSpot(TM) Client VM (1.5.0_15-b04 mixed mode, sharing)
# Problematic frame:
# C 0x9704e824
--------------- T H R E A D ---------------
Current thread (0x08379000): JavaThread "Xxxxxxxx main loop #1 (machine)" [_thread_in_native, id=15101]
siginfo:si_signo=11, si_errno=0, si_code=1, si_addr=0x9704e824
Registers:
EAX=0xb1f9c030, EBX=0xb1edafa0, ECX=0x48411fc8, EDX=0x08377218
ESP=0xb1d13bfc, EBP=0xb1d13c18, ESI=0xb1f1020a, EDI=0xb1edc5a8
EIP=0x9704e824, CR2=0x9704e824, EFLAGS=0x00010286
Top of Stack: (sp=0xb1d13bfc)
0xb1d13bfc: b1e78eb5 b1f9c030 48411fc8 b1e78e2b
0xb1d13c0c: b1f9b494 b1d13c50 b0786e50 b1d13c78
0xb1d13c1c: b1f6a332 b0786e50 48411fc8 b1d13c48
0xb1d13c2c: b7bca34c 083790c0 b1d13c40 08410e58
0xb1d13c3c: 00a0b574 b1f9c030 0838b2e0 b074ed18
0xb1d13c4c: b1fca214 b1f9c360 0838b2e0 b072e2d8
0xb1d13c5c: b1fb761c 08373ce8 b1d13c94 b1f6a16f
0xb1d13c6c: b1f9b494 08373c08 00000001 b1d13cc8
Instructions: (pc=0x9704e824)
0x9704e814:
[error occurred during error reporting, step 100, id 0xb]
Stack: [0xb1c94000,0xb1d15000), sp=0xb1d13bfc, free space=510k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C 0x9704e824
C [libxxxxxxxxxx.so.1.6+0x7d332] _ZN10MyApplication12Route4tickEj+0x1ce
C [libxxxxxxxxxx.so.1.6+0x34248] _ZN10MyApplication4Core8workEj+0x34
C [libyyyyyy.so+0x15457] ZN5CCore8mainLoopEP7JNIEnv+0x17f
C [libyyyyyy.so+0x1f299] Java_com_xx_xxxxxxxx_xxxxxxxximpl_jni_JCore_run+0x35
j com.xx.xxxxxxxx.xxxxxxxximpl.jni.JCore.run()V+0
v ~StubRoutines::call_stub
V [libjvm.so+0x17b2bc]
V [libjvm.so+0x28fed8]
V [libjvm.so+0x17ab15]
V [libjvm.so+0x17abae]
V [libjvm.so+0x1f2b15]
V [libjvm.so+0x2f9933]
V [libjvm.so+0x290ae8]
C [libpthread.so.0+0x5371]
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.xx.xxxxxxxx.xxxxxxxximpl.jni.JCore.run()V+0
v ~StubRoutines::call_stub
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
=>0x08379000 JavaThread "Xxxxxxxx main loop #1 (machine)" [_thread_in_native, id=15101]
0x083634d8 JavaThread "Thread-0" [_thread_in_native, id=15100]
0x080a5c60 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=15098]
0x080a47a8 JavaThread "CompilerThread0" daemon [_thread_blocked, id=15097]
0x080a3850 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=15096]
0x0809dbe8 JavaThread "Finalizer" daemon [_thread_blocked, id=15095]
0x0809bdb8 JavaThread "Reference Handler" daemon [_thread_blocked, id=15094]
0x0805caa0 JavaThread "main" [_thread_in_native, id=15092]
Other Threads:
0x0809a940 VMThread [id=15093]
0x080a71d0 WatcherThread [id=15099]
VM state:not at safepoint (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation total 576K, used 515K [0x88bc0000, 0x88c60000, 0x890a0000)
eden space 512K, 95% used [0x88bc0000, 0x88c3a560, 0x88c40000)
from space 64K, 40% used [0x88c40000, 0x88c46888, 0x88c50000)
to space 64K, 0% used [0x88c50000, 0x88c50000, 0x88c60000)
tenured generation total 1408K, used 918K [0x890a0000, 0x89200000, 0x8cbc0000)
the space 1408K, 65% used [0x890a0000, 0x89185850, 0x89185a00, 0x89200000)
compacting perm gen total 8192K, used 500K [0x8cbc0000, 0x8d3c0000, 0x90bc0000)
the space 8192K, 6% used [0x8cbc0000, 0x8cc3d110, 0x8cc3d200, 0x8d3c0000)
ro space 8192K, 68% used [0x90bc0000, 0x91142e10, 0x91143000, 0x913c0000)
rw space 12288K, 48% used [0x913c0000, 0x91991640, 0x91991800, 0x91fc0000)
Dynamic libraries:
00113000-00121000 r-xp 00000000 03:01 6292457 /lib/tls/libpthread-2.3.4.so
00121000-00123000 rwxp 0000d000 03:01 6292457 /lib/tls/libpthread-2.3.4.so
00123000-00125000 rwxp 00123000 00:00 0
0022c000-0023b000 r-xp 00000000 03:01 6292459 /lib/libresolv-2.3.4.so
0023b000-0023d000 rwxp 0000f000 03:01 6292459 /lib/libresolv-2.3.4.so
0023d000-0023f000 rwxp 0023d000 00:00 0
002be000-002c5000 r-xp 00000000 03:01 6292458 /lib/libgcc_s-3.4.6-20060404.so.1
002c5000-002c6000 rwxp 00007000 03:01 6292458 /lib/libgcc_s-3.4.6-20060404.so.1
002e8000-003a8000 r-xp 00000000 03:01 10722848 /usr/lib/libstdc++.so.6.0.3
003a8000-003ad000 rwxp 000bf000 03:01 10722848 /usr/lib/libstdc++.so.6.0.3
003ad000-003b3000 rwxp 003ad000 00:00 0
0087d000-0088f000 r-xp 00000000 03:01 6292465 /lib/libnsl-2.3.4.so
0088f000-00891000 rwxp 00011000 03:01 6292465 /lib/libnsl-2.3.4.so
00891000-00893000 rwxp 00891000 00:00 0
00b99000-00bae000 r-xp 00000000 03:01 6292453 /lib/ld-2.3.4.so
00bae000-00baf000 r-xp 00015000 03:01 6292453 /lib/ld-2.3.4.so
00baf000-00bb0000 rwxp 00016000 03:01 6292453 /lib/ld-2.3.4.so
00bb7000-00cdc000 r-xp 00000000 03:01 6292454 /lib/tls/libc-2.3.4.so
00cdc000-00cdd000 r-xp 00124000 03:01 6292454 /lib/tls/libc-2.3.4.so
00cdd000-00ce0000 rwxp 00125000 03:01 6292454 /lib/tls/libc-2.3.4.so
00ce0000-00ce2000 rwxp 00ce0000 00:00 0
00ce4000-00d05000 r-xp 00000000 03:01 6292455 /lib/tls/libm-2.3.4.so
00d05000-00d07000 rwxp 00020000 03:01 6292455 /lib/tls/libm-2.3.4.so
00d09000-00d0b000 r-xp 00000000 03:01 6292456 /lib/libdl-2.3.4.so
00d0b000-00d0d000 rwxp 00001000 03:01 6292456 /lib/libdl-2.3.4.so
08048000-08057000 r-xp 00000000 03:01 11715142 /usr/java/jdk1.5.0_15/bin/java
08057000-08059000 rwxp 0000e000 03:01 11715142 /usr/java/jdk1.5.0_15/bin/java
08059000-086b9000 rwxp 08059000 00:00 0
88bc0000-88c60000 rwxp 88bc0000 00:00 0
88c60000-890a0000 rwxp 88c60000 00:00 0
890a0000-89200000 rwxp 890a0000 00:00 0
89200000-8cbc0000 rwxp 89200000 00:00 0
8cbc0000-8d3c0000 rwxp 8cbc0000 00:00 0
8d3c0000-90bc0000 rwxp 8d3c0000 00:00 0
90bc0000-91143000 r-xs 00001000 03:01 11698348 /usr/java/jdk1.5.0_15/jre/lib/i386/client/classes.jsa
91143000-913c0000 rwxp 91143000 00:00 0
913c0000-91992000 rwxp 00584000 03:01 11698348 /usr/java/jdk1.5.0_15/jre/lib/i386/client/classes.jsa
91992000-91fc0000 rwxp 91992000 00:00 0
91fc0000-92090000 rwxp 00b56000 03:01 11698348 /usr/java/jdk1.5.0_15/jre/lib/i386/client/classes.jsa
92090000-923c0000 rwxp 92090000 00:00 0
923c0000-923c4000 r-xs 00c26000 03:01 11698348 /usr/java/jdk1.5.0_15/jre/lib/i386/client/classes.jsa
923c4000-927c0000 rwxp 923c4000 00:00 0
b0500000-b0521000 rwxp b0500000 00:00 0
b0521000-b0600000 --xp b0521000 00:00 0
b0600000-b0636000 rwxp b0600000 00:00 0
b0636000-b0700000 --xp b0636000 00:00 0
b0700000-b0800000 rwxp b0700000 00:00 0
b0873000-b0874000 --xp b0873000 00:00 0
b0874000-b1c74000 rwxp b0874000 00:00 0
b1c74000-b1c78000 r-xp 00000000 03:01 6291503 /lib/libnss_dns-2.3.4.so
b1c78000-b1c7a000 rwxp 00003000 03:01 6291503 /lib/libnss_dns-2.3.4.so
b1c94000-b1c97000 --xp b1c94000 00:00 0
b1c97000-b1d15000 rwxp b1c97000 00:00 0
b1d15000-b1d1b000 r-xs 00000000 03:01 10748120 /usr/lib/gconv/gconv-modules.cache
b1fcb000-b1fdd000 r-xp 00000000 03:01 11603256 /usr/java/jdk1.5.0_15/jre/lib/i386/libnet.so
b1fdd000-b1fde000 rwxp 00011000 03:01 11603256 /usr/java/jdk1.5.0_15/jre/lib/i386/libnet.so
b1fde000-b1fe1000 --xp b1fde000 00:00 0
b1fe1000-b205f000 rwxp b1fe1000 00:00 0
b2089000-b214f000 r-xs 00000000 03:01 11698359 /usr/java/jdk1.5.0_15/jre/lib/ext/localedata.jar
b214f000-b2152000 r-xs 00000000 03:01 11698358 /usr/java/jdk1.5.0_15/jre/lib/ext/dnsns.jar
b2152000-b217d000 r-xs 00000000 03:01 11698357 /usr/java/jdk1.5.0_15/jre/lib/ext/sunpkcs11.jar
b217d000-b21a4000 r-xs 00000000 03:01 11698356 /usr/java/jdk1.5.0_15/jre/lib/ext/sunjce_provider.jar
b21a4000-b21a5000 --xp b21a4000 00:00 0
b21a5000-b2225000 rwxp b21a5000 00:00 0
b2225000-b2228000 --xp b2225000 00:00 0
b2228000-b22a6000 rwxp b2228000 00:00 0
b22a6000-b22a9000 --xp b22a6000 00:00 0
b22a9000-b2327000 rwxp b22a9000 00:00 0
b2327000-b232a000 --xp b2327000 00:00 0
b232a000-b23a8000 rwxp b232a000 00:00 0
b23a8000-b25a8000 r-xp 00000000 03:01 10717357 /usr/lib/locale/locale-archive
b25a8000-b25ab000 --xp b25a8000 00:00 0
b25ab000-b2629000 rwxp b25ab000 00:00 0
b2629000-b262c000 --xp b2629000 00:00 0
b262c000-b26aa000 rwxp b262c000 00:00 0
b26aa000-b26ab000 --xp b26aa000 00:00 0
b26ab000-b273c000 rwxp b26ab000 00:00 0
b273c000-b2758000 rwxp b273c000 00:00 0
b2758000-b2759000 rwxp b2758000 00:00 0
b2759000-b2776000 rwxp b2759000 00:00 0
b2776000-b2777000 rwxp b2776000 00:00 0
b2777000-b2778000 rwxp b2777000 00:00 0
b2778000-b277a000 rwxp b2778000 00:00 0
b277a000-b2796000 rwxp b277a000 00:00 0
b2796000-b279a000 rwxp b2796000 00:00 0
b279a000-b27b6000 rwxp b279a000 00:00 0
b27b6000-b27c5000 rwxp b27b6000 00:00 0
b27c5000-b2841000 rwxp b27c5000 00:00 0
b2841000-b2941000 rwxp b2841000 00:00 0
b2941000-b4841000 rwxp b2941000 00:00 0
b4841000-b50b0000 r-xs 00000000 03:01 11603318 /usr/java/jdk1.5.0_15/jre/lib/charsets.jar
b50b0000-b50c5000 r-xs 00000000 03:01 11603283 /usr/java/jdk1.5.0_15/jre/lib/jce.jar
b50c5000-b514a000 r-xs 00000000 03:01 11603316 /usr/java/jdk1.5.0_15/jre/lib/jsse.jar
b514a000-b51b3000 rwxp b514a000 00:00 0
b51b3000-b77db000 r-xs 00000000 03:01 11603320 /usr/java/jdk1.5.0_15/jre/lib/rt.jar
b77db000-b77ea000 r-xp 00000000 03:01 11603253 /usr/java/jdk1.5.0_15/jre/lib/i386/libzip.so
b77ea000-b77ec000 rwxp 0000e000 03:01 11603253 /usr/java/jdk1.5.0_15/jre/lib/i386/libzip.so
b77ec000-b780d000 r-xp 00000000 03:01 11603251 /usr/java/jdk1.5.0_15/jre/lib/i386/libjava.so
b780d000-b780f000 rwxp 00020000 03:01 11603251 /usr/java/jdk1.5.0_15/jre/lib/i386/libjava.so
b780f000-b7818000 r-xp 00000000 03:01 6291506 /lib/libnss_files-2.3.4.so
b7818000-b781a000 rwxp 00008000 03:01 6291506 /lib/libnss_files-2.3.4.so
b7820000-b782b000 r-xp 00000000 03:01 11603250 /usr/java/jdk1.5.0_15/jre/lib/i386/libverify.so
b782b000-b782c000 rwxp 0000b000 03:01 11603250 /usr/java/jdk1.5.0_15/jre/lib/i386/libverify.so
b782c000-b7834000 rwxs 00000000 03:01 6619137 /tmp/hsperfdata_myname/15092
b7834000-b783a000 r-xp 00000000 03:01 11603246 /usr/java/jdk1.5.0_15/jre/lib/i386/native_threads/libhpi.so
b783a000-b783b000 rwxp 00006000 03:01 11603246 /usr/java/jdk1.5.0_15/jre/lib/i386/native_threads/libhpi.so
b783b000-b783c000 rwxp b783b000 00:00 0
b783c000-b783d000 r-xp b783c000 00:00 0
b783d000-b7baf000 r-xp 00000000 03:01 11698345 /usr/java/jdk1.5.0_15/jre/lib/i386/client/libjvm.so
b7baf000-b7bcd000 rwxp 00372000 03:01 11698345 /usr/java/jdk1.5.0_15/jre/lib/i386/client/libjvm.so
b7bcd000-b7fe6000 rwxp b7bcd000 00:00 0
bfe00000-bfe03000 --xp bfe00000 00:00 0
bfe03000-c0000000 rwxp bfe03000 00:00 0
ffffe000-fffff000 ---p 00000000 00:00 0
VM Arguments:
jvm_args: -Xcheck:jni -XX:+PrintCompilation
java_command: myapplication
Launcher Type: SUN_STANDARD
Environment Variables:
PATH=/home/myname/XXXXXXXX_PERF/bin:/usr/java/jdk1.5.0_15/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home/myname/bin
LD_LIBRARY_PATH=/usr/java/jdk1.5.0_15/jre/lib/i386/client:/usr/java/jdk1.5.0_15/jre/lib/i386:/usr/java/jdk1.5.0_15/jre/../lib/i386:/home/myname/XXXXXXXX/lib
SHELL=/bin/bash
DISPLAY=XXX.XXX.X.XXX:0.0
Signal Handlers:
SIGSEGV: [libjvm.so+0x32b740], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGBUS: [libjvm.so+0x32b740], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGFPE: [libjvm.so+0x28ef10], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGPIPE: [libjvm.so+0x28ef10], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGILL: [libjvm.so+0x28ef10], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGUSR2: [libjvm.so+0x291360], sa_mask[0]=0x00000000, sa_flags=0x14000004
SIGHUP: [libjvm.so+0x290d90], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGINT: [libjvm.so+0x290d90], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGQUIT: [libjvm.so+0x290d90], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
SIGTERM: [libjvm.so+0x290d90], sa_mask[0]=0x7ffbfeff, sa_flags=0x14000004
--------------- S Y S T E M ---------------
OS:Red Hat Enterprise Linux WS release 4 (Nahant Update 4)
uname:Linux 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686
libc:glibc 2.3.4 NPTL 2.3.4
rlimit: STACK 20480k, CORE 0k, NPROC 16375, NOFILE 1024, AS infinity
load average:3.46 1.36 0.50
CPU:total 2 (cores per cpu 1, threads per core 2) family 15 model 4 stepping 1, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ht
Memory: 4k page, physical 1034096k(389000k free), swap 0k(0k free)
vm_info: Java HotSpot(TM) Client VM (1.5.0_15-b04) for linux-x86, built on Feb 9 2008 01:37:00 by java_re with gcc 3.2.1-7a (J2SE release)
Regards
Fr�d�ric

Simple - something is wrong with your C/C++ code.
You have a pointer/memory bug.

Debugging C++ Programm using JNI

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