/* ilk process i (task0, kernel task) olusturur */
void init_kernel_task(struct dirent* root) {
int r;
ASSERT_int_disable();
task_curr = &task0;
task_curr->init();
task_curr->shared_mem_list.init();
task_curr->priority = 3;
fs_task_init(task_curr, root);
/* task icin kernel stack alani olustur */
r = task_curr->pgdir.segment_alloc(MMAP_KERNEL_STACK_BASE,
MMAP_KERNEL_STACK_SIZE,
PTE_P | PTE_W);
ASSERT( r == 0 );
move_stack((uint32_t)&__boot_stack + (0x4000-MMAP_KERNEL_STACK_SIZE),
va2kaddr(MMAP_KERNEL_STACK_BASE), MMAP_KERNEL_STACK_SIZE);
/* process id ata ve runnable listesine ekle */
set_task_id(task_curr);
add_to_runnable_list(task_curr);
print_info(">> task %d created\n", task_curr->id);
}
DebuggerEvent::DebuggerEvent(jbyte kind, int thread_id,
int clazz_id, jlong method_id,
jlong offset) :
_offset(offset),
_thread_id(thread_id),
_clazz_id(clazz_id),
_method_id(method_id),
_event_kind(kind)
{
#if ENABLE_ISOLATES
set_task_id(Thread::current()->task_id());
#endif
}
int XmppTaskIq::ProcessStart() {
set_task_id(GetClient()->NextId());
txmpp::scoped_ptr<txmpp::XmlElement> privacy(
MakeIq("get", txmpp::JID_EMPTY, task_id()));
txmpp::XmlElement *query = new txmpp::XmlElement(txmpp::QN_PRIVACY_QUERY);
privacy->AddElement(query);
SendStanza(privacy.get());
return STATE_RESPONSE;
}
void ComLog::init(const int task_id)
{
set_task_id(task_id, false);
}
// real
void ComLog::init()
{
set_task_id(-1, true);
}
// TODO: fork kurallari duzenlenmeli (neler kopyalanacak, neler kopyalanmayacak?)
int do_fork() {
CLOBBERED_REGISTERS_ALL();
/* debug only */
uint32_t mem_before_setup_vm = 0;
uint32_t mem_before_copy_pages = 0;
uint32_t mem_before_kernel_stack = 0;
/* */
int r;
Task *t;
uint32_t eip;
int e = 0; // error (bad_fork_* icin)
pushcli();
// ASSERT_int_disable();
t = (Task*)kmalloc(sizeof(Task));
if (!t)
goto bad_fork_task_alloc;
memcpy(t, task_curr, sizeof(Task));
t->init();
t->parent = task_curr;
t->state = Task::State_not_runnable;
/* -- */
mem_before_setup_vm = mem_free();
r = task_setup_vm(t, &task_curr->pgdir);
if (r < 0)
goto bad_fork_setup_vm;
/* user adres uzayini kopyala */
mem_before_copy_pages = mem_free();
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_USER_BASE,
MMAP_USER_SHARED_MEM_BASE);
if (r < 0)
goto bad_fork_copy_vm_user;
/* shared memory kismini kopyalama, shm_fork fonksiyonu kopyalayacak */
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_USER_SHARED_MEM_TOP,
MMAP_USER_TOP);
if (r < 0)
goto bad_fork_copy_vm_user;
t->pgdir.count_program = task_curr->pgdir.count_program;
t->pgdir.count_stack = task_curr->pgdir.count_stack;
t->pgdir.start_brk = task_curr->pgdir.start_brk;
t->pgdir.end_brk = task_curr->pgdir.end_brk;
/* */
/* ipc veriyapilari icin, ipc_fork */
r = ipc_fork(t);
if (r < 0)
goto bad_fork_ipc;
r = fs_fork(t);
if (r < 0)
goto bad_fork_fs;
/* kernel stackini kopyala */
mem_before_kernel_stack = mem_free();
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_KERNEL_STACK_BASE, MMAP_KERNEL_STACK_TOP);
if (r < 0)
goto bad_fork_copy_kernel_stack;
/* burasi 2 kere calisiyor */
eip = read_eip();
if (eip == 1) /* child process'de popif yapilmamali */
return 0;
/* child prosesin register bilgileri */
t->k_eip = eip;
read_reg(%esp, t->k_esp);
read_reg(%ebp, t->k_ebp);
/* child prosesin baslangic zamani */
t->time_start = jiffies;
/* child listesine ekle */
ASSERT( task_curr->childs.push_back(&t->childlist_node) );
/* process id ata ve runnable listesine ekle */
set_task_id(t);
add_to_runnable_list(t);
popif();
return t->id;
bad_fork_copy_kernel_stack:
if (e++ == 0)
print_warning("!! bad_fork_copy_kernel_stack\n");
task_free_kernel_stack(t);
ASSERT(mem_free() == mem_before_kernel_stack);
bad_fork_fs:
// TODO: --
bad_fork_ipc:
// TODO: --
bad_fork_copy_vm_user:
if (e++ == 0)
print_warning("!! bad_fork_copy_vm_user\n");
task_free_vm_user(t);
ASSERT(mem_free() == mem_before_copy_pages);
bad_fork_setup_vm:
if (e++ == 0)
print_warning("!! bad_fork_setup_vm\n");
task_delete_vm(t);
ASSERT(mem_free() == mem_before_setup_vm);
kfree(t);
t = NULL;
bad_fork_task_alloc:
if (e++ == 0)
print_warning("!! bad_fork_task_alloc\n");
ASSERT(t == NULL);
popif();
return -1;
}
