void initialiseString() {
FieldBlock *count = NULL, *value, *offset;
string_class = findSystemClass0(SYMBOL(java_lang_String));
registerStaticClassRef(&string_class);
if(string_class != NULL) {
count = findField(string_class, SYMBOL(count), SYMBOL(I));
value = findField(string_class, SYMBOL(value), SYMBOL(array_C));
offset = findField(string_class, SYMBOL(offset), SYMBOL(I));
}
/* findField doesn't throw an exception... */
if((count == NULL) || (value == NULL) || (offset == NULL)) {
jam_fprintf(stderr, "Error initialising VM (initialiseString)\n");
exitVM(1);
}
count_offset = count->offset;
value_offset = value->offset;
offset_offset = offset->offset;
/* Init hash table and create lock */
initHashTable(hash_table, HASHTABSZE, TRUE);
}
int classlibInitialiseNatives() {
Class *field_accessor;
FieldBlock *base_fb = NULL;
char *dll_path = getBootDllPath();
char *dll_name = getDllName("java");
char path[strlen(dll_path) + strlen(dll_name) + 2];
strcat(strcat(strcpy(path, dll_path), "/"), dll_name);
sysFree(dll_name);
if(!resolveDll(path, NULL)) {
jam_fprintf(stderr, "Error initialising natives: couldn't open "
"libjava.so: use -verbose:jni for more "
"information\n");
return FALSE;
}
field_accessor = findSystemClass0(SYMBOL(
sun_reflect_UnsafeStaticFieldAccessorImpl));
if(field_accessor != NULL)
base_fb = findField(field_accessor, SYMBOL(base),
SYMBOL(sig_java_lang_Object));
if(base_fb == NULL) {
jam_fprintf(stderr, "Error initialising natives: %s "
"missing or malformed\n",
SYMBOL(sun_reflect_UnsafeStaticFieldAccessorImpl));
return FALSE;
}
hideFieldFromGC(base_fb);
return initialiseJVMInterface();
}
int classlibInitialiseAccess() {
magic_accessor = findSystemClass0(SYMBOL(sun_reflect_MagicAccessorImpl));
if(magic_accessor == NULL)
return FALSE;
registerStaticClassRef(&magic_accessor);
return TRUE;
}
int classlibInitialiseJNI() {
FieldBlock *buffCap_fb, *buffAddr_fb, *rawdata_fb;
Class *buffer_class;
/* Cache class and method/fields for JNI 1.4 NIO support */
buffer_class = findSystemClass0(SYMBOL(java_nio_Buffer));
buffImpl_class = findSystemClass0(
SYMBOL(java_nio_DirectByteBufferImpl_ReadWrite));
rawdata_class = findSystemClass0(sizeof(uintptr_t) == 4
? SYMBOL(gnu_classpath_Pointer32)
: SYMBOL(gnu_classpath_Pointer64));
if(buffer_class == NULL || buffImpl_class == NULL || rawdata_class == NULL)
return FALSE;
buffImpl_init_mb = findMethod(buffImpl_class, SYMBOL(object_init),
SYMBOL(_java_lang_Object_gnu_classpath_Pointer_III__V));
buffCap_fb = findField(buffer_class, SYMBOL(cap), SYMBOL(I));
rawdata_fb = findField(rawdata_class, SYMBOL(data),
sizeof(uintptr_t) == 4 ? SYMBOL(I) : SYMBOL(J));
buffAddr_fb = findField(buffer_class, SYMBOL(address),
SYMBOL(sig_gnu_classpath_Pointer));
if(buffImpl_init_mb == NULL || buffCap_fb == NULL || rawdata_fb == NULL
|| buffAddr_fb == NULL)
return FALSE;
registerStaticClassRef(&buffImpl_class);
registerStaticClassRef(&rawdata_class);
buffCap_offset = buffCap_fb->u.offset;
buffAddr_offset = buffAddr_fb->u.offset;
rawdata_offset = rawdata_fb->u.offset;
return TRUE;
}
void initialiseException() {
FieldBlock *bcktrce;
int i;
ste_class = findSystemClass0(SYMBOL(java_lang_StackTraceElement));
ste_array_class = findArrayClass(SYMBOL(array_java_lang_StackTraceElement));
vmthrow_class = findSystemClass0(SYMBOL(java_lang_VMThrowable));
throw_class = findSystemClass0(SYMBOL(java_lang_Throwable));
bcktrce = findField(vmthrow_class, SYMBOL(backtrace), SYMBOL(sig_java_lang_Object));
vmthrow_init_mb = findMethod(ste_class, SYMBOL(object_init),
SYMBOL(_java_lang_String_I_java_lang_String_java_lang_String_Z__V));
if((bcktrce == NULL) || (vmthrow_init_mb == NULL)) {
jam_fprintf(stderr, "Error initialising VM (initialiseException)\n");
exitVM(1);
}
CLASS_CB(vmthrow_class)->flags |= VMTHROWABLE;
backtrace_offset = bcktrce->offset;
registerStaticClassRef(&ste_class);
registerStaticClassRef(&ste_array_class);
registerStaticClassRef(&vmthrow_class);
registerStaticClassRef(&throw_class);
/* Load and register the exceptions used within the VM.
These are preloaded to speed up access. The VM will
abort if any can't be loaded */
for(i = 0; i < MAX_EXCEPTION_ENUM; i++) {
exceptions[i] = findSystemClass0(symbol_values[exception_symbols[i]]);
registerStaticClassRef(&exceptions[i]);
}
inited = TRUE;
}
void initialiseThreadStage2(InitArgs *args) {
Object *java_thread;
Class *thrdGrp_class;
MethodBlock *run, *remove_thread;
FieldBlock *group, *priority, *root, *threadId;
FieldBlock *vmThread = NULL, *thread = NULL;
FieldBlock *vmData, *daemon, *name;
/* Load thread class and register reference for compaction threading */
thread_class = findSystemClass0(SYMBOL(java_lang_Thread));
registerStaticClassRef(&thread_class);
if(thread_class != NULL) {
vmThread = findField(thread_class, SYMBOL(vmThread), SYMBOL(sig_java_lang_VMThread));
daemon = findField(thread_class, SYMBOL(daemon), SYMBOL(Z));
name = findField(thread_class, SYMBOL(name), SYMBOL(sig_java_lang_String));
group = findField(thread_class, SYMBOL(group), SYMBOL(sig_java_lang_ThreadGroup));
priority = findField(thread_class, SYMBOL(priority), SYMBOL(I));
threadId = findField(thread_class, SYMBOL(threadId), SYMBOL(J));
init_mb = findMethod(thread_class, SYMBOL(object_init),
SYMBOL(_java_lang_VMThread_java_lang_String_I_Z__V));
run = findMethod(thread_class, SYMBOL(run), SYMBOL(___V));
vmthread_class = findSystemClass0(SYMBOL(java_lang_VMThread));
CLASS_CB(vmthread_class)->flags |= VMTHREAD;
/* Register class reference for compaction threading */
registerStaticClassRef(&vmthread_class);
if(vmthread_class != NULL) {
thread = findField(vmthread_class, SYMBOL(thread), SYMBOL(sig_java_lang_Thread));
vmData = findField(vmthread_class, SYMBOL(vmData), SYMBOL(I));
}
}
/* findField and findMethod do not throw an exception... */
if((init_mb == NULL) || (vmData == NULL) || (run == NULL) || (daemon == NULL) ||
(name == NULL) || (group == NULL) || (priority == NULL) || (vmThread == NULL) ||
(thread == NULL) || (threadId == NULL))
goto error;
vmthread_offset = vmThread->offset;
thread_offset = thread->offset;
vmData_offset = vmData->offset;
daemon_offset = daemon->offset;
group_offset = group->offset;
priority_offset = priority->offset;
threadId_offset = threadId->offset;
name_offset = name->offset;
run_mtbl_idx = run->method_table_index;
/* Initialise the Java-level thread objects for the main thread */
java_thread = initJavaThread(&main_thread, FALSE, "main");
/* Main thread is now sufficiently setup to be able to run the thread group
initialiser. This is essential to create the root thread group */
thrdGrp_class = findSystemClass(SYMBOL(java_lang_ThreadGroup));
root = findField(thrdGrp_class, SYMBOL(root), SYMBOL(sig_java_lang_ThreadGroup));
addThread_mb = findMethod(thrdGrp_class, SYMBOL(addThread),
SYMBOL(_java_lang_Thread_args__void));
remove_thread = findMethod(thrdGrp_class, SYMBOL(removeThread),
SYMBOL(_java_lang_Thread_args__void));
/* findField and findMethod do not throw an exception... */
if((root == NULL) || (addThread_mb == NULL) || (remove_thread == NULL))
goto error;
rmveThrd_mtbl_idx = remove_thread->method_table_index;
/* Add the main thread to the root thread group */
INST_DATA(java_thread)[group_offset] = root->static_value;
{
DummyFrame dummy;
executeMethod(&dummy, ((Object*)root->static_value), addThread_mb, java_thread);
}
// dyn
INST_DATA(java_thread)[vmthread_offset] = 0;
/* Setup signal handling. This will be inherited by all
threads created within Java */
initialiseSignals();
/* Create the signal handler thread. It is responsible for
catching and handling SIGQUIT (thread dump) and SIGINT
(user-termination of the VM, e.g. via Ctrl-C). Note it
must be a valid Java-level thread as it needs to run the
shutdown hooks in the event of user-termination */
createVMThread("Signal Handler", dumpThreadsLoop);
return;
error:
jam_fprintf(stderr, "Error initialising VM (initialiseMainThread)\nCheck "
"the README for compatible versions of GNU Classpath\n");
printException();
exitVM(1);
}