JVM breaks on JNI related code.
Hi,
I'm fairly new to JNI /java programming. So I have no clue if I should search this in the direction of a JVM bug or a code error.
I get a JVM crash at the following code:
/*
* Class:jOTDB_jOTDBconnection
* Method:getTreeList
* Signature: ()Ljava/util/Vector;
*/
JNIEXPORT jobject JNICALL Java_jOTDB_jOTDBconnection_getTreeList
(JNIEnv *env, jobject, jshort treeType, jshort classifiType)
{
vector<OTDBtree> trees = OTDBconn->getTreeList(treeType, classifiTy
pe);
vector<OTDBtree>::iterator treeIterator;
// Construct java Vector
jobject itemVector;
jclass class_Vector = env->FindClass"java/lang/Vector");
cout <<"before construct java vector" << endl;
jmethodID mid_Vector_cons = env->GetMethodID(class_Vector,"<init>"
,"()V");
cout <<"after construct java vector" << endl;
itemVector = env->NewObject(class_Vector, mid_Vector_cons);
jmethodID mid_Vector_add = env->GetMethodID(class_Vector,"add","(
Ljava/lang/Object;)Z");
for (treeIterator = trees.begin(); treeIterator != trees.end(); tre
eIterator++)
{
env->CallObjectMethod(itemVector, mid_Vector_add, convertOTDBt
ree(env, *treeIterator));
}
return(itemVector);
}
The JVM breaks at the statement:
jmethodID mid_Vector_cons = env->GetMethodID(class_Vector,"<init>"
,"()V");
The first part of the JVM dump:
before construct java vector
#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
# SIGSEGV (0xb) at pc=0x401b7696, pid=2884, tid=1182344768
#
# Java VM: Java HotSpot(TM) Client VM (1.5.0_04-b05 mixed mode, sharing)
# Problematic frame:
# V [libjvm.so+0x18f696]
the construction above I have seen in a lot of code examples, so I have no clue where to start looking
