Execption in JNI

i am refering this tutuorial
http://cnd.netbeans.org/docs/jni/beginning-jni-linux.html#Exercise_0
working on ubuntu
Running "/usr/bin/make -f Makefile CONF=Debug" in /home/jjoshi/NetBeansProjects
/HelloWorldNative
/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/jjoshi/NetBeansProjects/HelloWorldNative'
/usr/bin/make -f nbproject/Makefile-Debug.mk dist/libHelloWorldNative.so
make[2]: Entering directory `/home/jjoshi/NetBeansProjects/HelloWorldNative'
mkdir -p build/Debug/GNU-Linux-x86
rm -f build/Debug/GNU-Linux-x86/HelloWorldNative.o.d
gcc -shared -m32 -c -g -I../../Desktop/c\ lib -I/usr/lib/jvm/java-6-sun-1.6.0.07/include -I/usr/lib/jvm/java-6-sun-1.6.0.07/include/linux -fPIC -MMD -MP -MF build/Debug/GNU-Linux-x86/HelloWorldNative.o.d -o build/Debug/GNU-Linux-x86/HelloWorldNative.o HelloWorldNative.c
In file included from /usr/lib/jvm/java-6-sun-1.6.0.07/include/jni.h:21,
from HelloWorldNative.c:2:
../../Desktop/c lib/stdio.h:46:27: warning: crtdll/stddef.h: No such file or directory
In file included from /usr/lib/jvm/java-6-sun-1.6.0.07/include/jni.h:21,
from HelloWorldNative.c:2:
../../Desktop/c lib/stdio.h:176: error: expected declaration specifiers or ... before size_t
../../Desktop/c lib/stdio.h:198: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:212: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:213: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:214: error: expected ) before * token
../../Desktop/c lib/stdio.h:215: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:216: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:217: error: expected ) before * token
../../Desktop/c lib/stdio.h:228: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:229: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:230: error: expected ;, , or ) before * token
../../Desktop/c lib/stdio.h:250: error: expected =, ,, ;, asm or __attribute__ before fgetwc
../../Desktop/c lib/stdio.h:251: error: expected =, ,, ;, asm or __attribute__ before fputwc
../../Desktop/c lib/stdio.h:252: error: expected =, ,, ;, asm or __attribute__ before getwc
../../Desktop/c lib/stdio.h:253: error: expected =, ,, ;, asm or __attribute__ before ungetwc
../../Desktop/c lib/stdio.h:255: error: expected =, ,, ;, asm or __attribute__ before _filwbuf
../../Desktop/c lib/stdio.h:256: error: expected =, ,, ;, asm or __attribute__ before _flswbuf
../../Desktop/c lib/stdio.h:278: error: expected =, ,, ;, asm or __attribute__ before fread
../../Desktop/c lib/stdio.h:280: error: expected =, ,, ;, asm or __attribute__ before fwrite
HelloWorldNative.c:11:5: warning: no newline at end of file
make[2]: *** [build/Debug/GNU-Linux-x86/HelloWorldNative.o] Error 1
make[2]: Leaving directory `/home/jjoshi/NetBeansProjects/HelloWorldNative'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/jjoshi/NetBeansProjects/HelloWorldNative'
make: *** [.build-impl] Error 2
Build failed. Exit value 2.
how to solve it?

Hi,
this is definitely a C question and not a Java question, but anyway...
In the whole buch of error messages, the following is what you should look for. It most probably causes all that trouble:
../../Desktop/c lib/stdio.h:46:27: warning: crtdll/stddef.h: No such file or directoryMartin

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Howdy,
Here is the issue - I would like some help on HOW to debug and fix this problem:
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1)
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b) User submits to LoginServlet
c) login calls JNI code that connects to a powerbuilder(Yes I know this is ugly) PBNI code module (this is a .dll) that authenticates the user with the database
d) the servlet then redirects to another .jsp page
e) user then submits to LogoutServlet - also a JNI call to a powerbuilder PBNI code module
f) REPEAT STEPS a-e over a few times (inconsistent) and then the call to the JNI code hangs
2)
a) users does NOT goto Login.jsp, but rather calls LoginServlet and passes the userid and password as GET parms
b) user does NOT get redirected to a page (redirect code commented out)
c) user calls LogoutServlet
d) repeat steps a-c at will and no failure, no hanging
The only difference is that in case 1 (with JSP), there is a redirect and it afffected the JNI call by haniging inside JNI code.
In case 2 (without JSP) there is still a JNI call, but it does not hang. In addition, when it hangs and I stop Tomcat, the logs show cleanup entries that say:
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INFO: Waiting for 1 instance(s) to be deallocated
Oct 19, 2004 9:17:10 AM org.apache.catalina.core.StandardWrapper unload
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On would assume that the JNI code is not cleaning up after itself, but I don't believe this is the case,
and even if it was, why would I get the tomcat log cleanup entries above???
What do those cleanup entries imply about the state of Tomcat????

hi ,
I met the same problem this morning, and searched the www.google.com in order to solve it, as a result, your article was shown on my screen. :)
Till now I have read some technical information and solved my problems. Maybe the solution be useful to you:
==============================
error message : (Environment : Tomcat 5, Windows 2003, Mysql5)
2006-3-29 11:53:48 org.apache.catalina.core.StandardWrapper unload
message: Waiting for 2 instance(s) to be deallocated
==============================
cause: the number of connection to database exceeded.another word,too many connections.
==============================
solution: close the connection when it becomes useless for your program. :)
==============================
ps. Sorry for my weak English . hehe ....

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MyTestDLL.
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Hi!
I have this application that has a GUI written in Java and a file parser written in C. JNI is used to connect these parts together. The problem is that the application only works when I am using jdk 1.1.8 but not when using jdk1.2, jdk1.3 or jdk1.4. I am running the application on a Solaris 8 machine.
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Unexpected Signal : 10 occurred at PC=0xFA023164
Function=Java_Bitmap_setDebug+0x1C
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Current Java thread:
at Bitmap.setDebug(Native Method)
at DisplayPanel.loadFile(DisplayPanel.java:396)
at MicPlot.loadFile(MicPlot.java:1452)
at MicPlot.loadFile(MicPlot.java:1441)
at MicPlot.miOpen_Action(MicPlot.java:1267)
at MicPlot$SymAction.actionPerformed(MicPlot.java:1184)
at java.awt.MenuItem.processActionEvent(MenuItem.java:588)
at java.awt.MenuItem.processEvent(MenuItem.java:548)
at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:285)
at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:273)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:452)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Dynamic libraries:
0x10000 /opt/java/jdk1.4/bin/java
0xff360000 /usr/lib/libthread.so.1
0xff3a0000 /usr/lib/libdl.so.1
0xff280000 /usr/lib/libc.so.1
0xff270000 /usr/platform/SUNW,Ultra-4/lib/libc_psr.so.1
0xfe000000 /opt/java/j2sdk1.4.1/jre/lib/sparc/client/libjvm.so
0xff220000 /usr/lib/libCrun.so.1
0xff200000 /usr/lib/libsocket.so.1
0xff100000 /usr/lib/libnsl.so.1
0xff1d0000 /usr/lib/libm.so.1
0xff250000 /usr/lib/libw.so.1
0xff0e0000 /usr/lib/libmp.so.2
0xff0b0000 /opt/java/j2sdk1.4.1/jre/lib/sparc/native_threads/libhpi.so
0xff080000 /opt/java/j2sdk1.4.1/jre/lib/sparc/libverify.so
0xff030000 /opt/java/j2sdk1.4.1/jre/lib/sparc/libjava.so
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0xfe4e0000 /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.2
0xedd00000 /opt/java/j2sdk1.4.1/jre/lib/sparc/libawt.so
0xfc480000 /opt/java/j2sdk1.4.1/jre/lib/sparc/libmlib_image.so
0xfc410000 /opt/java/j2sdk1.4.1/jre/lib/sparc/motif21/libmawt.so
0xeda80000 /usr/dt/lib/libXm.so.4
0xfa090000 /usr/openwin/lib/libXt.so.4
0xfa3d0000 /usr/openwin/lib/libXext.so.0
0xfc7e0000 /usr/openwin/lib/libXtst.so.1
0xed980000 /usr/openwin/lib/libX11.so.4
0xfa2a0000 /usr/openwin/lib/libdps.so.5
0xfa3b0000 /usr/openwin/lib/libSM.so.6
0xfa1d0000 /usr/openwin/lib/libICE.so.6
0xed880000 /opt/java/j2sdk1.4.1/jre/lib/sparc/libfontmanager.so
0xfa390000 /usr/openwin/lib/locale/common/xlibi18n.so.2
0xfa1b0000 /usr/openwin/lib/locale/iso8859-1/xomEuro.so.2
0xfa190000 /usr/lib//liblayout.so
0xfa050000 /usr/openwin/lib/locale/common/ximlocal.so.2
0xfa010000 /usr/u/lal/micview/micview2_1_0_beta1/libBitmapImpl.so
Local Time = Thu Oct 3 13:32:47 2002
Elapsed Time = 35
# The exception above was detected in native code outside the VM
# Java VM: Java HotSpot(TM) Client VM (1.4.1-beta-b14 mixed mode)
# An error report file has been saved as hs_err_pid27692.log.
# Please refer to the file for further information.
Abort
From this information I think that the problem should be in the native method setDebug. But I have tried to set a breakpoint at the beginning of that function in the C part but with no luck. The application crashes before it reaches that position in the C file.
What could possibly go wrong between the setDebug function in the C part and the function call in the Java part?
When using GDB, GDB cannot figure out what is wrong it just returns a hex address, no function name.
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Best regards
Lars

I have figured out that the application fails on its first call to the native methods.
So I have this Bitmap class that contains all the native calls and it is defined shortly as follow:
public class Bitmap {
static {
System.loadLibrary("BitmapImpl");
native void setDebug(int debuglevel, int statistics);
There are many more native methods defined in Bitmap, but I only show the setDebug method because that is the first one that is executed and also the one that immediately fails.
My setDebug C function is defined as follow in BitmapImpl.c
#include <time.h>
#include <stdio.h>
#include <limits.h>
#include <fcntl.h>
#include <jni.h>
#include <math.h>
#include <errno.h>
#include "Bitmap.h"
#include "data.h"
jint debug = 0;
jint statistics = 1;
JNIEXPORT void JNICALL Java_Bitmap_setDebug
(JNIEnv *jenv, jobject jo, jint d, jint s)
debug = d;
statistics = s;
My libBitmapImpl.so file is compiled using the following Makefile and using GNU gcc:
JAVAPATH=$(JAVAINCLUDEPATH)
LMACRO=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DSOLARIS
CSOURCE=BitmapImpl.c
all:
gcc -O3 -G $(LMACRO) -I$(JAVAPATH) -I$(JAVAPATH)/solaris \
$(CSOURCE) -o libBitmapImpl.so
It is still a total mystory why the application fails. I have tried it on a RedHat Linux machine and there it works fine. But not on Solaris. Only if I use the jdk1.1.8 but not a later one.
Would really appreiciate some help!
Best regards
Lars

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Regards,
- Triet

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#include <string>
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#include "TestThread.h"
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public:
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hi ,
I met the same problem this morning, and searched the www.google.com in order to solve it, as a result, your article was shown on my screen. :)
Till now I have read some technical information and solved my problems. Maybe the solution be useful to you:
==============================
error message : (Environment : Tomcat 5, Windows 2003, Mysql5)
2006-3-29 11:53:48 org.apache.catalina.core.StandardWrapper unload
message: Waiting for 2 instance(s) to be deallocated
==============================
cause: the number of connection to database exceeded.another word,too many connections.
==============================
solution: close the connection when it becomes useless for your program. :)
==============================
ps. Sorry for my weak English . hehe ....

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     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
     at java.lang.Thread.run(Thread.java:536)
please help me
Luis Navarro.
Chile

ApiEncripatcion.h
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class ApiEncriptacion */
#ifndef IncludedApiEncriptacion
#define IncludedApiEncriptacion
#ifdef __cplusplus
extern "C" {
#endif
* Class: ApiEncriptacion
* Method: encripta
* Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
JNIEXPORT jstring JNICALL Java_ApiEncriptacion_encripta
(JNIEnv *, jobject, jstring, jstring, jstring);
* Class: ApiEncriptacion
* Method: desencripta
* Signature: (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
JNIEXPORT jstring JNICALL Java_ApiEncriptacion_desencripta
(JNIEnv *, jobject, jstring, jstring);
#ifdef __cplusplus
#endif
#endif
ApiEncriptacion.c
#include "jni.h"
#include <stdio.h>
#include "files.h"
#include "hex.h"
#include "rsa.h"
#include "randpool.h"
USING_NAMESPACE(CryptoPP)
USING_NAMESPACE(std)
void GenerateRSAKey(unsigned int keyLength, const char privFilename, const char pubFilename, const char *seed);
char RSAEncryptString(const char pubFilename, const char seed, const char message);
char RSADecryptString(const char privFilename, const char *ciphertext);
JNIEXPORT jstring JNICALL
Java_ApiEncriptacion_encripta(JNIEnv *env, jobject obj, jstring texto, jstring ubicacionLlavePublica, jstring semilla)
     try
          char *ciphertext = RSAEncryptString(ubicacionLlavePublica, semilla, texto);
          delete [] ciphertext;
          return(ciphertext);
     catch(CryptoPP::Exception &e)
          return ("");
     catch(std::exception &e)
          return ("");
     catch(...)
          return ("");
JNIEXPORT jstring JNICALL
Java_ApiEncriptacion_desencripta(JNIEnv *env, jobject obj, jstring texto, jstring ubicacionLlavePrivada)
     try
          char *decrypted = RSADecryptString(ubicacionLlavePrivada, texto);
          return(decrypted);
     catch(CryptoPP::Exception &e)
          return ("");
     catch(std::exception &e)
          return ("");
     catch(...)
          return ("");
int main()
     return(0);
void GenerateRSAKey(unsigned int keyLength, const char privFilename, const char pubFilename, const char *seed)
     RandomPool randPool;
     randPool.Put((byte *)seed, strlen(seed));
     RSAES_OAEP_SHA_Decryptor priv(randPool, keyLength);
     HexEncoder privFile(new FileSink(privFilename));
     priv.DEREncode(privFile);
     privFile.MessageEnd();
     RSAES_OAEP_SHA_Encryptor pub(priv);
     HexEncoder pubFile(new FileSink(pubFilename));
     pub.DEREncode(pubFile);
     pubFile.MessageEnd();
char RSAEncryptString(const char pubFilename, const char seed, const char message)
     FileSource pubFile(pubFilename, true, new HexDecoder);
     RSAES_OAEP_SHA_Encryptor pub(pubFile);
     if (strlen(message) > pub.MaxPlainTextLength())
          cerr << "message too long for this key\n";
          abort();
     RandomPool randPool;
     randPool.Put((byte *)seed, strlen(seed));
     char outstr = new char[2pub.CipherTextLength()+1];
     pub.Encrypt(randPool, (byte *)message, strlen(message), (byte *)outstr);
     HexEncoder hexEncoder;
     hexEncoder.Put((byte *)outstr, pub.CipherTextLength());
     hexEncoder.MessageEnd();
     hexEncoder.Get((byte *)outstr, 2*pub.CipherTextLength());
     outstr[2*pub.CipherTextLength()] = 0;
     return outstr;
char RSADecryptString(const char privFilename, const char *ciphertext)
     FileSource privFile(privFilename, true, new HexDecoder);
     RSAES_OAEP_SHA_Decryptor priv(privFile);
     HexDecoder hexDecoder;
     hexDecoder.Put((byte *)ciphertext, strlen(ciphertext));
     hexDecoder.MessageEnd();
     SecByteBlock buf(priv.CipherTextLength());
     hexDecoder.Get(buf, priv.CipherTextLength());
     char *outstr = new char[priv.MaxPlainTextLength()+1];
     unsigned messageLength = priv.Decrypt(buf, (byte *)outstr);
     outstr[messageLength] = 0;
     return outstr;

Problem with JNI hello world

I found some tutorial on SUN site on how to use JNI. I'm using Eclipse to compije Java and C (via Cygwin) files. Here are complete files:
Hello.java:
class Hello
     public native void sayHello();
     static
          try
          System.loadLibrary("hello");
          catch(Exception e)
               System.out.println("exc");
     public static void main(String[] args)
          Hello h = new Hello();
          h.sayHello ();
}Hello.c:
#include <mingw/_mingw.h> //because there are some types needed for JNI
#include <jni.h>
#include "Hello.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_Hello_sayHello
(JNIEnv *env, jobject obj)
     printf("Hello world!\n");
     return;
}Makefile:
hello.dll : Hello.o Hello.def
     gcc -g -shared -Wl,--kill-at -o hello.dll Hello.o hello.def
Hello.o : Hello.c Hello.h
     gcc -c -g -I"$(JAVA_HOME)\include" -I"$(JAVA_HOME)\include\win32" Hello.c -o Hello.o
Hello.h : Hello.class
     javah -jni Hello
clean :
     rm Hello.h
     rm Hello.o
     rm hello.dllHello.def
EXPORTS
Java_Hello_sayHelloEverything goes well, but when I run java program it does nothin (it should print message, but it just exit without any error).I'm sure that it's something stupid, but I cant see what. Can anyone tell me what am I doing wrong?
Thenks.

Answer 1: yes, there was no problem. I compiled and started simple 'hello world' program from Cygwin and from WinXP console, and it worked well.
Answer 2: This is weird, I changed code to this:
Hello.java:
     public native int getInt();
          System.out.println("Returned int is " + h.getInt());Hello.c:
JNIEXPORT jint JNICALL Java_Hello_getInt
(JNIEnv *env, jobject obj)
     return 25;
}It does not print anything. I started this program from Cygwin and from WinXP console, and from Eclipse. Only if I debug in Eclipse (step by step) I get:
Returned int is 25and still I don't get Hello string printed (even if I go step by step). It looks like cygwin has some problem with OS. Do you have any idea what to do, I'm a bit confused?
Thank you.
Message was edited by:
zly

Problem with Jni on Solaris

Hello I am using a Native code that is working perfect on Windows .
I have used DllMain calls to initialize my threads .
I attach my lower stack threads to the JNI by using these methods.
Well I want to know what is way to put the same functionality on Solaris.As this particular method is specific to Windows Platform only.
BOOL APIENTRY DllMain( HANDLE hModule,                     // handle to DLL module
DWORD ul_reason_for_call,      // reason for calling function
LPVOID lpReserved                // reserved
     BOOL returnValue = FALSE;
switch (ul_reason_for_call)
          case DLL_PROCESS_ATTACH:
               // We do not perform any initialization
               // within this section. Instead we have
               // chosen to use the JNI_OnLoad function
               // as the library initialization point.
               returnValue = TRUE;
               break;
          case DLL_THREAD_ATTACH:
               // We are to initialize the thread local storage
               // variables in this call.
               if( BridgeUtility::getInstance() -> threadInitialize() != 0 ) {
                    returnValue = FALSE;
                    printf(" Thread initialize failed..\n");
               }else {
                    printf(" Thread initialize succed..\n");
                    returnValue = TRUE;
               break;
          case DLL_THREAD_DETACH:
               // We are to uninitialize the thread local storage
               // variables in this call.
               if( BridgeUtility::getInstance() -> threadUninitialize() != 0 )
                    returnValue = FALSE;
               else
                    returnValue = TRUE;
               break;
          case DLL_PROCESS_DETACH:
               // We do not perform any uninitialization
               // within this section. Instead we have
               // chosen to use the JNI_OnUnload function
               // as the library initialization point.
               returnValue = TRUE;
               break;

If your aim is to load the library and initialize it
that one time, consider using the pthread once routines
to handle library initialization. See, for example,
chapter 5 of Butenhof's "Programming with POSIX
threads".

JNI and Tomcat

I am trying to use a JNI library on Tomcat. I have created a class with a JNI API. I have tested its use being calling it from a Java application. It works. When I try to invoke it from my app server (Tomcat), I get a java.lang.UnsatisfiedLinkError exception. I must find a way to specify where the library is located, but haven't found how to do this. I have tried to add a -Djava.library.path=... option in the JAVAOPT environment variable in the shell where I run the catalina.sh script, but this didn't help.
Any advice?

If you are using tomcat over UNIX, you shold put the LD_LIBRARY_PATH pointing the path of your native library.

Problem with JNI on netBeans

Hi !
After a search on the forum, I request your help about a little JNI app developped to work with a 3D sensor. The research team in which I work use to working with Eclipse IDE, and this JNI appliation work on it. However, impossible to find a way on NetBeans... I get an exception :
Exception in thread "main" java.lang.UnsatisfiedLinkError:
materiel.videoproj.JNIsiapp.SiInitialize()I
at materiel.videoproj.JNIsiapp.SiInitialize(Native Method)
at materiel.videoproj.JNIsiapp.main(JNIsiapp.java:138)
It seems the IDE get the DLL (if I change the name in the loadLibrary method, the exception change) but encounter an error with the native method.
The application (source code + dll + java code) could be find on ftp :
ftp://ftp-us.3dconnexion.com
login: jni
password: dev1221
Please help me too find a way !
FloDeTours

Library loading seems to continue to be a problem. There are two things to consider. First if you wrote the C/C++ code (like in the tutorials) then you compile it into a dll. This is the only dll you have to worry about. It will get loaded by your Java code using loadLibrary.
This method is going to look for the dll on the path java.library.path. If you don't set this, it is equal to the system path. I like to keep everything inside my project so I put alll dlls in a directory off my project root called "native". So I set java.library.path to "native". In any case it should point to the location of the dll if it is not on the system path.
Second if you have a 3rd party dll then you also have a JNI dll. The JNI dll is the one that loadLibrary loads, so the above applies to it. The third party dll is loaded on the C/C++ side, which know nothing about java.library.path. I only knows system path. This means that the location of this dll must be in that path. You can add the location to the system path permanently or use the IDE project setting to add it only inside the project scope.
When you deploy the app you will need to supply the various path settings in the launching code.
Jim

Problem with JNI in a Solaris shared library

Hi,
I have a problem.
I have used JNI in my .dll on Windows & .so on Solaris . I have also used the same JNI code in a .exe on Windows & an executable on Solaris. 3 out of the above 4 combinations work & 1 doesen't. When I use JNI from a .so on Solaris 8(with/without the J2SE recommended patch), the JVM seems to have some exception & dumps core when I invoke CreateJavaVM(). See Below - I've included the output on the screen & the output from 'pstack core' :
Unexpected Signal : 11 occurred at PC=0xFED29D44
Function=[Unknown. Nearest: JVM_GetMethodIxExceptionIndexes+0x1994]
Library=/usr/java/jre/lib/sparc/libjvm.so
Current Java thread:
Dynamic libraries:
0x10000 SblSim
0xff280000 /usr/lib/libnsl.so.1
0xfec00000 /usr/java/jre/lib/sparc/libjvm.so
0xff370000 /usr/lib/libpthread.so.1
0xff350000 /usr/lib/librt.so.1
0xff260000 /usr/lib/libsocket.so.1
0xff390000 /usr/lib/libdl.so.1
0xff230000 /usr/lib/libCrun.so.1
0xff200000 /usr/lib/libm.so.1
0xff340000 /usr/lib/libw.so.1
0xff1b0000 /usr/lib/libthread.so.1
0xff080000 /usr/lib/libc.so.1
0xff180000 /usr/lib/libmp.so.2
0xff160000 /usr/lib/libaio.so.1
0xff1f0000 /usr/platform/SUNW,Sun-Blade-1000/lib/libc_psr.so.1
0xfebd0000 /usr/j2se/jre/lib/sparc/native_threads/libhpi.so
0xfeba0000 /usr/j2se/jre/lib/sparc/libverify.so
0xfeb60000 /usr/j2se/jre/lib/sparc/libjava.so
0xfeb40000 /usr/j2se/jre/lib/sparc/libzip.so
0xfe920000 /usr/lib/locale/en_US.ISO8859-1/en_US.ISO8859-1.so.2
0xf1400000 ./libaicd.so
0xfc480000 ./libmttoolkit.so
0xfdfe0000 ./libmttlogger.so
0xfdfb0000 /usr/j2se/jre/lib/sparc/libnet.so
Local Time = Tue Nov 12 09:51:37 2002
Elapsed Time = 29
# HotSpot Virtual Machine Error : 11
# Error ID : 4F530E43505002D5 01
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
# Java VM: Java HotSpot(TM) Client VM (1.4.0_01-b03 mixed mode)
# An error report file has been saved as hs_err_pid3120.log.
# Please refer to the file for further information.
Abort(coredump)
Below is the output of 'pstack core'
$ pstack core
core 'core' of 3120: SblSim libaicd.so 127.0.0.1 9999
----------------- lwp# 1 / thread# 1 --------------------
ff1c9764 __sigprocmask (ff1cbf60, 0, 0, 565f8, ff1de000, 0) + 8
ff1be110 _sigon   (565f8, ff1e5930, 6, ffbedba4, 565f8, 6) + d0
ff1c1150 thrpkill (0, 1, 6, ff1de000, 1, ff140450) + f8
ff0cb900 raise (6, 0, 0, ffffffff, ff1403bc, 4) + 40
ff0b58ec abort (ff13c000, ffbedcf8, 0, fffffff8, 4, ffbedd19) + 100
feee2700 ???????? (1, fef98e50, ffbedd98, 0, feffc130, feee1258)
feee12c8 ???????? (60650, b, fed29d44, ffbeeab8, b, 0)
fede77c0 ???????? (fed29d44, ffbeeab8, ffbee800, fed29d44, fed03744, 0)
ff1cb824 __sighndlr (b, ffbeeab8, ffbee800, fede6f38, 5669c, 5668c) + c
ff1c84d8 sigacthandler (b, 565f8, 0, 0, 0, ff1de000) + 708
--- called from signal handler with signal 11 (SIGSEGV) ---
fed29d44 ???????? (0, 60650, 0, 0, 0, 0)
fed2d7d4 ???????? (606e4, 0, 0, ffbeed00, 0, 0)
f172e818 __1cHJNIEnv_JNewObject6MpnH_jclass_pnK_jmethodID_E_pnI_jobject__ (606e4, 0, 0, ffbeed70, 39, 107f90) + 70
f172dbf8 __1cGJEvent2t5B6M_v_ (107f60, f1a877f4, db088, ff0c1c44, 107f48, 0) + 80
f16f2864 __1cGCEvent2t6Mii_v_ (107f60, 0, 1, ff13c000, 107f48, 0) + 7c
f16e62e8 __1cVCISCHelperThreadMutex2t6M_v_ (107f50, 0, 560ac, 30f68, fefe4000, 0) + c0
f16ddc34 __1cLinitGlobals6F_v_ (0, 1, 19a, f1a198ec, f1a198ec, 0) + 5c
f16de4e4 CreateISCDriverInstance (0, 5cc40, 0, 57608, 565e8, 0) + 554
00034f08 __1cJRunSblSim6F_v_ (1, ffbef322, ffbef32c, ff13fc70, 100d4, 0) + 320
00035588 main (4, ffbef1dc, ffbef1f0, 55c00, 0, 0) + 1a8
00018460 _start   (0, 0, 0, 0, 0, 0) + 108
----------------- lwp# 2 / thread# 2 --------------------
ff11e958 _signotifywait (ff1de000, 59, 0, 0, 0, 0) + 8
ff1c2030 thr_yield (0, 0, 0, 0, 0, 0) + 8c
----------------- lwp# 3 --------------------------------
ff1c9774 private___lwp_cond_wait (ff075d70, ff1ded9c, ff1de000, 0, 0, 4) + 8
ff11c554 doorreturn (ff075cb0, ff1ba740, 0, 0, 0, 0) + 68
----------------- lwp# 4 / thread# 4 --------------------
ff11efbc ___lwp_cond_wait (60048, 60030, fe901ad0, 0, 0, fe901ac8) + 8
ff116610 lwpcond_timedwait (1cb8c88, 3dd1157a, fe901ba4, 60030, 60048, 1) + 98
fecfc7d8 ???????? (0, 1, 0, 581b8, feffa26c, 0)
fecfcfd4 ???????? (ff00a15c, feffa4b8, feffa4b4, 0, 0, 0)
fecfccc0 ???????? (d3980, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (d3980, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (d3980, 0, 0, 0, 0, 0) + 40
----------------- lwp# 5 --------------------------------
ff11c4fc doorreturn (4, ff1df688, ff1df6a0, 3, ff1de000, 1) + 10
ff1ba740 lwpstart (fea95d70, 0, 6000, ff075b74, 0, 0) + 18
ff1c2030 thr_yield (0, 0, 0, 0, 0, 0) + 8c
----------------- lwp# 6 / thread# 5 --------------------
ff11efbc ___lwp_cond_wait (d5720, d5708, 0, fed10a40, 0, 0) + 8
fed110d4 ???????? (d56c8, 0, 5000, 5210, d4d38, 4d24)
fed10824 ???????? (fdf8172c, 0, 0, d4d38, d4d38, 30dec8)
fed103b0 ???????? (d4dcc, fdf81824, 0, 0, 0, 0)
fa40cc94 ???????? (f2000380, b6, fdf818a4, ffffffff, 0, fdf817c0)
fa405da0 ???????? (f2000380, b6, fdf818a8, fa415444, 0, fdf81840)
fa405da0 ???????? (fdf81938, 0, 0, fa4157a4, 2f4210, fdf818d8)
fa400438 ???????? (fdf819c0, fdf81c08, a, f6050b68, fa40bc8c, fdf81b50)
fecfe2f8 ???????? (fdf81c00, fdf81a88, fdf81b48, d4d38, d4d38, fdf81a9c)
fed0ff90 ???????? (fefe4000, d5298, fdf81b3c, fdf81b38, fdf81b48, d4d38)
fed0fdf0 ???????? (fdf81c00, fdf81bfc, fdf81bf0, fdf81be8, fdf81be0, d4d38)
fed0fd78 ???????? (d4d38, d4d38, ac9a0, d5298, 2d4488, fed0fa60)
fed0fa88 ???????? (d4d38, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (d4d38, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (d4d38, 0, 0, 0, 0, 0) + 40
----------------- lwp# 7 / thread# 6 --------------------
ff11efbc ___lwp_cond_wait (d7040, d7028, 0, 1, 0, 0) + 8
fed110d4 ???????? (d6fe8, 0, 5000, 5210, d6658, 4d24)
fed10824 ???????? (fa38169c, 0, 0, d6658, d6658, 30dec8)
fed103b0 ???????? (d66ec, fa38179c, 0, 0, 0, 0)
fa40cc94 ???????? (f2000490, b6, fa3817a0, fa414050, 0, fa381730)
fa405da0 ???????? (f2000478, b6, fa3818b4, fa415444, 0, fa3817d8)
fa405c4c ???????? (f2000478, b6, fa381934, fa415444, d6658, fa381858)
fa405c4c ???????? (fa381938, 0, 0, fa38197c, 2f4210, fa3818d8)
fa400438 ???????? (fa3819c0, fa381c08, a, f60520b8, fa40bc8c, fa381b50)
fecfe2f8 ???????? (fa381c00, fa381a88, fa381b48, d6658, d6658, fa381a9c)
fed0ff90 ???????? (fefe4000, d6bb8, fa381b3c, fa381b38, fa381b48, d6658)
fed0fdf0 ???????? (fa381c00, fa381bfc, fa381bf0, fa381be8, fa381be0, d6658)
fed0fd78 ???????? (d6658, d6658, ac9e0, d6bb8, 2d4488, fed0fa60)
fed0fa88 ???????? (d6658, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (d6658, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (d6658, 0, 0, 0, 0, 0) + 40
----------------- lwp# 8 / thread# 7 --------------------
ff11d194 _poll    (0, 0, 0, fa281a28, ff13f1b4, fa281a28) + 8
ff1cb134 select (0, a, 0, ff1de000, fa281e14, 0) + 34
fed32afc ???????? (d8040, 0, a, 0, 0, 0)
fed328b4 ???????? (d8040, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (d8040, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (d8040, 0, 0, 0, 0, 0) + 40
----------------- lwp# 9 / thread# 8 --------------------
ff11efbc ___lwp_cond_wait (5f998, 5f980, 2e7aa0, ff1de000, fa181e14, 0) + 8
fecfc634 ???????? (5f950, 0, 0, 0, feffa26c, 0)
fed3371c ???????? (3c00, 3f44, 0, 0, 0, 0)
fecfcbd0 ???????? (d81a8, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (d81a8, 0, 0, 0, 0, 0) + 40
----------------- lwp# 10 / thread# 9 --------------------
ff11f008 lwpsema_wait (f1f81e30, ff1de000, 0, f1f81d70, ff3e2628, 0) + c
ff1b94c0 _swtch   (f1f81d70, ffffffff, ff1de000, 5, 1000, 0) + 158
ff1bcc64 sema_wait (ff020fe0, ff1e98e4, 5000, 10000, 534d, 1) + bc
fed345c8 ???????? (0, 6, b, a, 1, 0)
fed34254 ???????? (ff002ae4, ff00a5a0, ff00a5d4, dab90, 2d4488, fed0fa60)
fed0fa88 ???????? (da630, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (da630, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (da630, 0, 0, 0, 0, 0) + 40
----------------- lwp# 11 / thread# 10 --------------------
ff11efbc ___lwp_cond_wait (604e8, 604d0, 2e7aa0, feffa26c, 106c40, 0) + 8
fecfc88c ???????? (604a0, 0, 0, dbbd0, feffa26c, 0)
fed349ac ???????? (db670, db670, dbfd0, dbbd0, 2d4488, fed0fa60)
fed0fa88 ???????? (db670, 0, 0, 0, 0, 0)
fecfcbd0 ???????? (db670, ff1df688, 1, 1, ff1de000, 0)
ff1cb728 threadstart (db670, 0, 0, 0, 0, 0) + 40
-------------------------- thread# 3 --------------------
ff1bddbc reapwait (ff1e29e0, 20520, 0, ff1de000, 0, 0) + 38
ff1bdb14 _reaper (ff1dee30, ff1e4740, ff1e29e0, ff1dee08, 1, fe400000) + 38
ff1cb728 threadstart (0, 0, 0, 0, 0, 0) + 40

This is an update to the original message -
I have tried both HotSpot & Server JVMs but still see the
same behavior. I'm using 1.4 .
I'd like to provide more information to those who can help
me. I have a feeling there might be something wrong in my
CC options. Thus you will find below what my CC statement
looks like for one of the files in my project & for the
linking of the final shared library. I also have
provided the output of ldd on my shared library libaicd.so
& for comparison the output of ldd on libjvm.so as that
might provide some usefull information just incase
something looks suspecious & might ring a bell.
/opt/SUNWspro.cc6/bin/CC -c -KPIC -g -DDEBUG=DEBUG -
D_DEBUG -mt -DSOLARIS -DSTD_STREAM -
I/vob1/qwsrc/fw/include -I.-I/vob4/source/idl -
I/vob4/source/mttoolkit -I/vob4/source/mttoolkit/tools -
I/vob4/source/integrations/siebel/aicd -
I/vob4/source/include -I/vob1/qwsrc/fw/include -
I/vob4/source/source -I/vob4/source/mttoolkit -
I/vob1/external/platform_neutral/siebel/scapi/include -
I/external/sparc/Sun/jdk/1.3.1/include -
I/external/sparc/Sun/jdk/1.3.1/include/solaris -
I/vob4/source/idl -I/vob4/source/mttoolkit -
I/vob4/source/mttoolkit/tools -
I/vob4/source/mttoolkit/vnet -
I/vob4/source/mttoolkit/bool -DUNIX -
D_USE_MTTServerToolkit -D_JAVA_ WIAcceptTimeOut.cpp -
o /space/users/janak/buildoutput/sparc/debug/obj/integratio s/siebel/aicd/WIAcceptTimeOut.o
/opt/SUNWspro.cc6/bin/CC -G -
o /space/users/janak/buildoutput/sparc/debug/lib/fw/libaicd.so
/space/us
ers/janak/buildoutput/sparc/debug/obj/integrations/siebel/ai
cd/AgentService.o /space/users/janak/buildoutput/sparc/debug
/obj/integrations/siebel/aicd/AgentServiceCmds.o /space/user
s/janak/buildoutput/sparc/debug/obj/integrations/siebel/aicd
/AgentServiceEvents.o /space/users/janak/buildoutput/sparc/d
ebug/obj/integrations/siebel/aicd/AgentServiceICAReq.o /spac
e/users/janak/buildoutput/sparc/debug/obj/integrations/siebe
l/aicd/AgentServiceICEvents.o /space/users/janak/buildoutput
/sparc/debug/obj/integrations/siebel/aicd/AgentServiceUtilit
ies.o /space/users/janak/buildoutput/sparc/debug/obj/integra
tions/siebel/aicd/AvMc.o /space/users/janak/buildoutput/spar
c/debug/obj/integrations/siebel/aicd/InternationalStrings.o
/space/users/janak/buildoutput/sparc/debug/obj/integrations/
siebel/aicd/JEvent.o /space/users/janak/buildoutput/sparc/de
bug/obj/integrations/siebel/aicd/JMultipleEvents.o /space/us
ers/janak/buildoutput/sparc/debug/obj/integrations/siebel/ai
cd/JNIObject.o /space/users/janak/buildoutput/sparc/debug/ob
j/integrations/siebel/aicd/JObject.o /space/users/janak/buil
doutput/sparc/debug/obj/integrations/siebel/aicd/JSemaphore.
o /space/users/janak/buildoutput/sparc/debug/obj/integration
s/siebel/aicd/JWorkerThread.o /space/users/janak/buildoutput
/sparc/debug/obj/integrations/siebel/aicd/MultipleEvents.o /
space/users/janak/buildoutput/sparc/debug/obj/integrations/s
iebel/aicd/Param.o /space/users/janak/buildoutput/sparc/debu
g/obj/integrations/siebel/aicd/ParamQueue.o /space/users/jan
ak/buildoutput/sparc/debug/obj/integrations/siebel/aicd/RefC
ount.o /space/users/janak/buildoutput/sparc/debug/obj/integr
ations/siebel/aicd/SiebelDriver.o /space/users/janak/buildou
tput/sparc/debug/obj/integrations/siebel/aicd/SiebelEvent.o
/space/users/janak/buildoutput/sparc/debug/obj/integrations/
siebel/aicd/SiebelWorkItem.o /space/users/janak/buildoutput/
sparc/debug/obj/integrations/siebel/aicd/SingleEvent.o /spac
e/users/janak/buildoutput/sparc/debug/obj/integrations/siebe
l/aicd/SmartPtr.o /space/users/janak/buildoutput/sparc/debug
/obj/integrations/siebel/aicd/StdAfx.o /space/users/janak/bu
ildoutput/sparc/debug/obj/integrations/siebel/aicd/ThreadPoo
l.o /space/users/janak/buildoutput/sparc/debug/obj/integrati
ons/siebel/aicd/Utilities.o /space/users/janak/buildoutput/s
parc/debug/obj/integrations/siebel/aicd/WIAcceptTimeOut.o -
lnsl -lc -lCstd -
L/space/users/janak/buildoutput/sparc/debug/lib/cti -
lmttoolkit -
L/space/users/janak/buildoutput/sparc/debug/lib/fw -
lmttlogger -
L/space/users/janak/buildoutput/sparc/debug/lib/fw -
lqwlicmtt -
L/external/sparc/Sun/jdk/1.3.1/jre/lib/sparc/server -
Bdynamic -ljvm -mt -lpthread -lposix4
$ ldd /usr/j2se/jre/lib/sparc/libjvm.so
libCrun.so.1 => /usr/lib/libCrun.so.1
libdl.so.1 => /usr/lib/libdl.so.1
libthread.so.1 => /usr/lib/libthread.so.1
libsocket.so.1 => /usr/lib/libsocket.so.1
libnsl.so.1 => /usr/lib/libnsl.so.1
libm.so.1 => /usr/lib/libm.so.1
libw.so.1 => /usr/lib/libw.so.1
libc.so.1 => /usr/lib/libc.so.1
libmp.so.2 => /usr/lib/libmp.so.2
/usr/platform/SUNW,Sun-Blade-1000/lib/libc_psr.so.1
$ ldd libaicd.so
libnsl.so.1 => /usr/lib/libnsl.so.1
libc.so.1 => /usr/lib/libc.so.1
libmttoolkit.so => ./libmttoolkit.so
libmttlogger.so => ./libmttlogger.so
libjvm.so => /usr/java/jre/lib/sparc/libjvm.so
libpthread.so.1 => /usr/lib/libpthread.so.1
librt.so.1 => /usr/lib/librt.so.1
libdl.so.1 => /usr/lib/libdl.so.1
libmp.so.2 => /usr/lib/libmp.so.2
libCrun.so.1 => /usr/lib/libCrun.so.1
libthread.so.1 => /usr/lib/libthread.so.1
libsocket.so.1 => /usr/lib/libsocket.so.1
libm.so.1 => /usr/lib/libm.so.1
libaio.so.1 => /usr/lib/libaio.so.1
libw.so.1 => /usr/lib/libw.so.1
/usr/platform/SUNW,Sun-Blade-1000/lib/libc_psr.so.1

Problem with JNI for target armlinux

Dear friends,
We have compiled CVM for ARM Linux and it is working fine for java programs as well as C programs.
But when I try to make shared library out of a sample hello world JNI program for arm linux it says 'jni.h: No such file or directory' and after that many lines 'syntax error' and 'parse error' etc.
But the same program is running fine on x86 linux. Problem only while cross compiling for arm linux. It is not problem with arm-v5t-le-gcc because that is working fine. Problem is with what I need to include in makefiles.
As I am new to this domain could anyone help me where I am missing?
Regards
Kishore

I'm not exactly sure what you're talking about, but it sounds like you may need to look into global references. Look at NewGlobalRef() and DeleteGlobalRef() and see if those help you out.
God bless,
-Toby Reyelts
For all your JNI woes, check out Jace - http://jace.reyelts.com/jace

Problem with JNI

i have to implement a few standard APIs. As a part of the implementation I have to provide references to an object I create. Now my underlying code is C++ with JNI used to throw the Java APIs. Problem is JNI now returns different references for the same object and hence my prupose id defeated. Could anyone suggest how this problem can be overcome.

I tried to figure out what your problem is, but can't. Please rephrase it and give a bit more detail on what you are doing and what is going wrong.

Problem with jni references

i have to implement a few standard APIs. As a part of the implementation I have to provide references to an object I create. Now my underlying code is C++ with JNI used to throw the Java APIs. Problem is JNI now returns different references for the same object and hence my prupose id defeated. Could anyone suggest how this problem can be overcome.

I'm not exactly sure what you're talking about, but it sounds like you may need to look into global references. Look at NewGlobalRef() and DeleteGlobalRef() and see if those help you out.
God bless,
-Toby Reyelts
For all your JNI woes, check out Jace - http://jace.reyelts.com/jace

Execption in JNI

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