[kaffe] A question about "JNI_OnLoad"

[embstudy at eyou.com]

Hello

This is the cmd I used:
______________________________________________________________________________
__
# kaffe -v -vmdebug AWT,NATIVELIB -ss 128600 -cp $PWD Calc
------------------------------------------------------------------------------
--
And I got the following errors:
++++++++++++++++++++++++++++++
Native lib /cvs/xscale/jre/lib/arm/libnative
        LOAD desc=0xb42d0 index=0 ++ref=1
Couldn't find JNI_OnLoad in library handle 0 == libnative.
Error message is /cvs/xscale/jre/lib/arm/libkaffevm-1.1.x-cvs.so: undefined
symbol: JNI_OnLoad.
Loading java/lang/Object.class(/cvs/xscale/jre/lib/rt.jar) [compressed]
Loading java/io/Serializable.class(/cvs/xscale/jre/lib/rt.jar) [compressed]

...

ading kaffe/io/StdErrorStream.class(/cvs/xscale/jre/lib/rt.jar) [compressed]
Loading java/io/FileInputStream.class(/cvs/xscale/jre/lib/rt.jar)
[compressed]
Loading java/io/FileDescriptor.class(/cvs/xscale/jre/lib/rt.jar)
[compressed]
Loading java/io/FileOutputStream.class(/cvs/xscale/jre/lib/rt.jar)
[compressed]
Method =
java/lang/System.initProperties(Ljava/util/Properties;)Ljava/util/Properties;

Native stub = 'java_lang_System_initProperties'
Found java_lang_System_initProperties in library handle 0 == libnative.
Internal error: caught an unexpected exception.
Please check your CLASSPATH and your installation.
java/lang/NullPointerException
        at java.lang.System.initProperties(System.java:native)
        at java.lang.System.<clinit>(System.java:43)
        at java.lang.ClassLoader.<init>(ClassLoader.java:115)
        at java.lang.ClassLoader.<init>(ClassLoader.java:111)
        at java.security.SecureClassLoader.<init>(SecureClassLoader.java:59)
        at java.net.URLClassLoader.<init>(URLClassLoader.java:544)
        at kaffe.lang.AppClassLoader.<init>(AppClassLoader.java:237)
Aborted 
------------------------------------------------------------------------------
---

I am not sure what caused my program to Aborted now.
Maybe anyone knows?
But the "Error message" :
   |Couldn't find JNI_OnLoad in library handle 0 == libnative.
   |Error message is /cvs/xscale/jre/lib/arm/libkaffevm-1.1.x-cvs.so: 
   |undefined  symbol: JNI_OnLoad.
always exists.

Then I try to make sure what really happened to the symbol 'JNI_OnLoad'.
Step 1. #cd kaffe
        #find * -exec grep -inH "JNI_On" {} \;
       
+++--------------------------------------------------------------------
        ChangeLog.6:952:        * kaffe/kaffevm/external.c
(loadNativeLibrary2) Call JNI_OnLoad
        include/jni.h:196:JNIEXPORT jint JNICALL JNI_OnLoad (JavaVM *, void
*);
        include/jni.h:197:JNIEXPORT void JNICALL JNI_OnUnload (JavaVM *, void
*);
        kaffe/kaffevm/external.c:380:        func =
loadNativeLibrarySym("JNI_OnLoad"); 
        kaffe/kaffevm/external.c:383:       /* Call JNI_OnLoad */
        Binary file kaffe/kaffevm/.libs/external.o matches
        Binary file kaffe/kaffevm/.libs/libkaffevm-1.1.x-cvs.so matches
        Binary file kaffe/kaffevm/.libs/libkaffevm.so matches
        Binary file kaffe/kaffevm/.libs/libkaffevm-1.1.x-cvs.soT matches
       
+++---------------------------------------------------------------------

Step 2. From Step1 we can make sure that there is only two source file
contains the symbol "JNI_OnLoad". 
        #vi include/jni.h
       
+++---------------------------------------------------------------------
        /* These functions might be defined in libraries which we load; the
        JNI implementation calls them at the appropriate times.  */
        JNIEXPORT jint JNICALL JNI_OnLoad (JavaVM *, void *);
        JNIEXPORT void JNICALL JNI_OnUnload (JavaVM *, void *);
       
+++----------------------------------------------------------------------
        #vi kaffe/kaffevm/external.c
       
+++----------------------------------------------------------------------
        func = loadNativeLibrarySym("JNI_OnLoad");
        if (func != NULL) {
            JavaVM *jvm = &Kaffe_JavaVM;
            /* Call JNI_OnLoad */
            ((jint(JNICALL *)(JavaVM *, void *))func)(jvm, NULL);
        }
       
+++----------------------------------------------------------------------
Step 3. From Step2 we know that "JNI_OnLoad" is not realized now in kaffe.
        So I think the "Error Message" means that:
       
+++----------------------------------------------------------------------     
  libkaffevm-1.1.x-cvs.so loads the func                            
        "func = loadNativeLibrarySym("JNI_OnLoad")" from the libnative,but
there 
        is no such a func there in libnative. Because even we  couldn't  
        find such a symbol named "JNI_OnLoad" at the libnative.
       
+++----------------------------------------------------------------------

Could anyone point out the trick for me?

cheers
Saw










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