void variable_oops_do(void do_oop(OopDesc**)) {
Thread::Raw thread = _thread;
if (thread.not_null()) {
// GC handles &_next_stack
do_oop(&_thread);
thread().stack_oops_do(do_oop);
}
}
bool ThreadObj::is_alive() {
Thread::Raw t = thread();
if (TraceThreadEvents) {
TTY_TRACE_CR(("ThreadObj 0x%x has Thread 0x%x, status %s",
obj(), t.obj(), is_terminated() ? "TERMINATED" : "ALIVE"));
}
return !t().is_null() && !is_stillborn() && !is_terminated();
}
void VMEvent::clear_event_request(VMEvent *ep)
{
LocationModifier::Raw mod;
Thread::Raw thread;
VMEvent::remove_event_request(ep);
#ifdef AZZERT
if (TraceDebugger) {
tty->print_cr("VMEvent: clear 0x%x, id 0x%x", (int)ep->obj(), ep->event_id());
}
#endif
switch (ep->event_kind()) {
case JDWP_EventKind_BREAKPOINT:
mod = get_modifier(ep,
JDWP_EventRequest_Set_Out_modifiers_Modifier_LocationOnly);
GUARANTEE(!mod.is_null(), "No location modifier for breakpoint event");
if (!mod.is_null()) {
#if ENABLE_ISOLATES
// See if any other task already has a breakpoint here.
VMEvent::Raw epb = find_breakpoint_event(&mod);
if (!epb.is_null()) {
// Has to be some other task since we have unlinked this event
GUARANTEE(epb().task_id() != ep->task_id(),
"Duplicate breakpoint event for this task");
} else {
#endif
mod().set_method_opcode(mod().save_opcode(), false);
#if ENABLE_ISOLATES
}
#endif
}
break;
case JDWP_EventKind_SINGLE_STEP:
mod = get_modifier(ep,
JDWP_EventRequest_Set_Out_modifiers_Modifier_Step);
if (mod.not_null()) {
thread = JavaDebugger::get_thread_by_id(mod().thread_id());
if (thread.not_null())
thread().set_is_stepping(false);
JavaDebugger::set_stepping(false);
}
break;
}
// see if there are any other breakpoints in this method. If no other
// breakpoints and the compiler is active then clear the
// impossible_to_compile flag.
if (mod.not_null() && (ep->event_kind() == JDWP_EventKind_BREAKPOINT ||
ep->event_kind() == JDWP_EventKind_SINGLE_STEP)) {
clear_impossible_to_compile(&mod, ep);
}
}
/*
* void nativeStart(Object [] startupState)
* where startupState contains the following:
* String classname
* String [] args
* String [][] context
*
* Note: all objects passed in parameters belongs to the new isolate
* and no copy are necessary. See comments in com.sun.cldc.isolate.Isolate.
*/
void Java_com_sun_cldc_isolate_Isolate_nativeStart(JVM_SINGLE_ARG_TRAPS) {
Thread::Raw saved;
bool has_exception = false;
const int id = Task::allocate_task_id(JVM_SINGLE_ARG_CHECK);
{
UsingFastOops fast_oops;
IsolateObj::Fast isolate = GET_PARAMETER_AS_OOP(0);
ObjectHeap::set_task_memory_quota(id, isolate().memory_reserve(),
isolate().memory_limit() JVM_CHECK);
const int prev = ObjectHeap::on_task_switch( id );
saved = Task::create_task(id, &isolate JVM_NO_CHECK);
ObjectHeap::on_task_switch( prev );
if( saved.is_null() ) {
ObjectHeap::reset_task_memory_usage(id);
Task::cleanup_unstarted_task(id);
isolate().terminate(-1 JVM_NO_CHECK_AT_BOTTOM);
return;
}
}
// save current thread pointer, no non-raw handles please!
Thread::Raw current = Thread::current();
Thread::set_current(&saved);
{
// handles ok now
UsingFastOops fast_oops;
Thread::Fast orig = ¤t();
Thread::Fast t = &saved();
// IMPL_NOTE: SHOULDN'T WE DO SOMETHING HERE IF THERE IS SOME EXCEPTION
// RELATED TO STARTUP FAILURE (i.e., reclaim the task's id and
// proceed to task termination cleanup, including sending of
// isolate events)
Task::start_task(&t JVM_NO_CHECK);
has_exception = (CURRENT_HAS_PENDING_EXCEPTION != NULL);
current = orig; // GC may have happened. Reload.
saved = t; // GC may have happened. Reload.
}
// we set the current thread back to the original so that the C interpreter
// will switch threads correctly. The new thread/task is set to be the
// next thread/task to run when switch_thread is called a few instructions
// from now.
Thread::set_current(¤t);
if (has_exception) {
UsingFastOops fast_oops;
// new isolate got an exception somewhere during start_task(). The isolate
// may not be able to handle the exception since we don't know at which
// point it got the exception. Some classes may not be initialized,
// task mirrors may not be setup etc. We just tear down the new isolate
// and return an exception to the parent.
Task::Fast task = Task::get_task(id);
IsolateObj::Fast isolate = GET_PARAMETER_AS_OOP(0);
Thread::Fast thrd = &saved();
GUARANTEE(!task.is_null(), "Task should not be null at this point");
task().set_status(Task::TASK_STOPPED);
task().set_thread_count(0);
isolate().terminate(-1 JVM_NO_CHECK);
saved = thrd; // GC may have happened. Reload.
}
if (has_exception) {
// Convoluted dance here. Child isolate failed to start
// We check the type of exception
// if (exception == oome)
// throw oome to parent
// else if (exception == isolateresourceerror)
// throw IsolateResourceError to parent
// else
// throw java.lang.Error to parent
// Make sure we don't have any handles to child objects before
// calling Task::cleanup_terminated_task()
//
UsingFastOops fast_oops;
Thread::Fast thrd = &saved();
JavaOop::Fast exception = thrd().noncurrent_pending_exception();
String::Fast str;
{
ThreadObj::Raw thread_obj = thrd().thread_obj();
// Mark thread as terminated even though it never really started
if (!thread_obj.is_null()) {
thread_obj().set_terminated();
}
}
Scheduler::terminate(&thrd JVM_NO_CHECK);
thrd.set_null(); // thrd handle has to be disposed here
JavaOop::Fast new_exception = Universe::out_of_memory_error_instance();
JavaClass::Fast exception_class = exception().blueprint();
// oome class *must* be loaded in parent, how can it not be?
InstanceClass::Fast oome_class =
SystemDictionary::resolve(Symbols::java_lang_OutOfMemoryError(),
ErrorOnFailure JVM_NO_CHECK);
InstanceClass::Fast ire_class =
SystemDictionary::resolve(Symbols::com_sun_cldc_isolate_IsolateResourceError(),
ErrorOnFailure JVM_NO_CHECK);
if( oome_class.not_null() && !oome_class.equals(&exception_class)
&& ire_class.not_null() ) {
new_exception = Throw::allocate_exception(
ire_class.equals(&exception_class) ?
Symbols::com_sun_cldc_isolate_IsolateResourceError() :
Symbols::java_lang_Error(),
&str JVM_NO_CHECK);
}
exception_class.set_null(); // cleared handles to child objects
exception.set_null(); //
Task::cleanup_terminated_task(id JVM_NO_CHECK);
Thread::set_current_pending_exception(&new_exception);
}
}
