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javajava-native-interfacejvmtijnienv

How to get the class in which the method is declared using jmethod id via JVMTI interface

I am writing a custom debugger for JVM using the JVMTI interface's APIs and i need to get the class name in which the method is declared, i get the method id of the method using error = (*jvmti)->GetMethodName(jvmti,frames[i].method,&methodName,NULL,NULL); and i am trying to get the class name using error = (*jvmti)->GetMethodDeclaringClass(jvmti,frames[i].method,&declaring_class_ptr);

this returns the jclass reference in the declaring_class_ptr, my question is how to convert this to a string which gives the class name?

Solution

  • To get the class name you need to use GetClassSignature, something like: 

    char* name;
jvmti->GetClassSignature(class, &name, NULL);
trace(jvmti, "Class prepared: %s", fix_class_name(name));
jvmti->Deallocate((unsigned char*)name);