void
exception_no_server(void)
{
ipc_thread_t self = current_thread();
/*
* If this thread is being terminated, cooperate.
*/
while (thread_should_halt(self))
thread_halt_self(thread_exception_return);
#if 0
if (thread_suspend (self) == KERN_SUCCESS)
thread_exception_return ();
#endif
#if MACH_KDB
if (debug_user_with_kdb) {
/*
* Debug the exception with kdb.
* If kdb handles the exception,
* then thread_kdb_return won't return.
*/
db_printf("No exception server, calling kdb...\n");
thread_kdb_return();
}
#endif /* MACH_KDB */
/*
* All else failed; terminate task.
*/
(void) task_terminate(self->task);
thread_halt_self(thread_exception_return);
panic("terminating the task didn't kill us");
/*NOTREACHED*/
}
/*
* Routine: exception
* Purpose:
* The current thread caught an exception.
* We make an up-call to the thread's exception server.
* Conditions:
* Nothing locked and no resources held.
* Called from an exception context, so
* thread_exception_return and thread_kdb_return
* are possible.
* Returns:
* Doesn't return.
*/
void
exception_triage(
exception_type_t exception,
mach_exception_data_t code,
mach_msg_type_number_t codeCnt)
{
thread_t thread;
task_t task;
host_priv_t host_priv;
struct exception_action *excp;
lck_mtx_t *mutex;
kern_return_t kr;
assert(exception != EXC_RPC_ALERT);
if (exception == KERN_SUCCESS)
panic("exception");
/*
* Try to raise the exception at the activation level.
*/
thread = current_thread();
mutex = &thread->mutex;
excp = &thread->exc_actions[exception];
kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
goto out;
/*
* Maybe the task level will handle it.
*/
task = current_task();
mutex = &task->lock;
excp = &task->exc_actions[exception];
kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
goto out;
/*
* How about at the host level?
*/
host_priv = host_priv_self();
mutex = &host_priv->lock;
excp = &host_priv->exc_actions[exception];
kr = exception_deliver(thread, exception, code, codeCnt, excp, mutex);
if (kr == KERN_SUCCESS || kr == MACH_RCV_PORT_DIED)
goto out;
/*
* Nobody handled it, terminate the task.
*/
#if MACH_KDB
if (debug_user_with_kdb) {
/*
* Debug the exception with kdb.
* If kdb handles the exception,
* then thread_kdb_return won't return.
*/
db_printf("No exception server, calling kdb...\n");
thread_kdb_return();
}
#endif /* MACH_KDB */
(void) task_terminate(task);
out:
if (exception != EXC_CRASH)
thread_exception_return();
return;
}
