/** * Calls static initializer if necessary before * dispatching with dispatch_special(). * @param retAddr Return bytecode address. * @param btAddr Backtrack bytecode address (in case * static initializer is executed). */ void dispatch_special_checked (byte classIndex, byte methodIndex, byte *retAddr, byte *btAddr) { ClassRecord *classRecord; MethodRecord *methodRecord; #if DEBUG_METHODS printf ("dispatch_special_checked: %d, %d, %d, %d\n", classIndex, methodIndex, (int) retAddr, (int) btAddr); #endif // If we need to run the initializer then the real method will get called // later, when we re-run the current instruction. classRecord = get_class_record (classIndex); if (!is_initialized_idx (classIndex)) if (dispatch_static_initializer (classRecord, btAddr) != EXEC_CONTINUE) return; methodRecord = get_method_record (classRecord, methodIndex); if(dispatch_special (methodRecord, retAddr)) { if (is_synchronized(methodRecord)) { if (!is_static(methodRecord)) { Object *ref = (Object *)curLocalsBase[0]; current_stackframe()->monitor = ref; enter_monitor (currentThread, ref); } else { Object *ref = (Object *)classRecord; current_stackframe()->monitor = ref; enter_monitor (currentThread, ref); } } } }
void dispatch_virtual (Object *ref, int signature, byte *retAddr) { ClassRecord *classRecord; MethodRecord *methodRecord; int classIndex; #if DEBUG_METHODS printf("dispatch_virtual %d\n", signature); #endif if (ref == JNULL) { throw_new_exception (JAVA_LANG_NULLPOINTEREXCEPTION); return; } // When calling methods on arrays, we use the methods for the Object class... classIndex = get_class_index(ref); LABEL_METHODLOOKUP: classRecord = get_class_record (classIndex); methodRecord = find_method (classRecord, signature); if (methodRecord == null) { #if SAFE if (classIndex == JAVA_LANG_OBJECT) { throw_new_exception (JAVA_LANG_NOSUCHMETHODERROR); return; } #endif classIndex = classRecord->parentClass; goto LABEL_METHODLOOKUP; } if (dispatch_special (methodRecord, retAddr)) { if (is_synchronized(methodRecord)) { current_stackframe()->monitor = ref; enter_monitor (currentThread, ref); } } }
void dispatch_virtual (Object *ref, TWOBYTES signature, byte *retAddr) { MethodRecord *auxMethodRecord; byte auxByte; #if DEBUG_METHODS printf("dispatch_virtual %d\n", signature); #endif if (ref == JNULL) { throw_exception (nullPointerException); return; } auxByte = get_class_index(ref); LABEL_METHODLOOKUP: tempClassRecord = get_class_record (auxByte); auxMethodRecord = find_method (tempClassRecord, signature); if (auxMethodRecord == null) { #if SAFE if (auxByte == JAVA_LANG_OBJECT) { throw_exception (noSuchMethodError); return; } #endif auxByte = tempClassRecord->parentClass; goto LABEL_METHODLOOKUP; } if (dispatch_special (auxMethodRecord, retAddr)) { if (is_synchronized(auxMethodRecord)) { current_stackframe()->monitor = ref; enter_monitor (currentThread, ref); } } }
/** * Exceute the static initializer if required. Note that the ret address used * here is set such that the current instruction will be re-started when the * initialization completes. * @return An indication of how the VM should proceed */ int dispatch_static_initializer (ClassRecord *aRec, byte *retAddr) { int state = get_init_state(aRec); ClassRecord *init = aRec; ClassRecord *super = get_class_record(init->parentClass); MethodRecord *method; // Are we needed? if (state & C_INITIALIZED) return EXEC_CONTINUE; // We need to initialize all of the super classes first. So we find the // highest one that has not been initialized and deal with that. This code // will then be called again and we will init the next highest and so on // until all of the classes in the chain are done. for(;;) { // find first super class that has not been initialized while (init != super && (get_init_state(super) & C_INITIALIZED) == 0) { init = super; super = get_class_record(init->parentClass); } // Do we have an initilizer if so we have found our class if (has_clinit (init)) break; // no initializer so mark as now initialized set_init_state (init, C_INITIALIZED); // If we are at the start of the list we are done if (init == aRec) return EXEC_CONTINUE; // Otherwise go do it all again init = aRec; } state = get_init_state(init); // are we already initializing ? if (state & C_INITIALIZING) { // Is it this thread that is doing the init? if (get_sync(init)->threadId == currentThread->threadId) return EXEC_CONTINUE; // No so we must retry the current instruction curPc = retAddr; sleep_thread(1); schedule_request(REQUEST_SWITCH_THREAD); return EXEC_RETRY; } #if DEBUG_METHODS printf ("dispatch_static_initializer: has clinit: %d, %d\n", (int) aRec, (int) retAddr); #endif // Static initializer is always the first method method = get_method_table(init); if ((byte *)method == get_binary_base() || method->signatureId != _6clinit_7_4_5V) { throw_new_exception (JAVA_LANG_NOSUCHMETHODERROR); return EXEC_EXCEPTION; } // Can we run it? if (!dispatch_special (method, retAddr)) return EXEC_RETRY; // Mark for next time set_init_state(init, C_INITIALIZING); // and claim the monitor current_stackframe()->monitor = (Object *)init; enter_monitor (currentThread, (Object *)init); return EXEC_RUN; }