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removed _KernelProcess.

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added System>>_findProcessById and System>>_findProcessByIdGreater
touched os signal handler in System
This commit is contained in:
hyunghwan.chung 2019-09-09 07:43:14 +00:00
parent b9199faaf6
commit da1f8cb67b
5 changed files with 119 additions and 113 deletions
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14
moo/kernel/Process.moo
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@ -7,10 +7,9 @@ class(#pointer,#final,#limited) Process(Object)
var sem, perr, perrmsg.
var asyncsg.
method primError { ^self.perr }
method primErrorMessage { ^self.perrmsg }
method(#primitive) sp.
method(#primitive) resume.
@ -77,12 +76,6 @@ class(#pointer,#final,#limited) Process(Object)
}
}
class(#pointer,#limited,#final) _KernelProcess(Process)
{
// _KernelProcess is a predefined kernel class. so it can inherit from a final class, Process.
// It must be exactly the same as Process other than inheritance and is used internally only.
}
class Semaphore(Object)
{
var waiting_head := nil,
@ -434,8 +427,5 @@ class(#final,#limited) ProcessScheduler(Object)
var suspended_head, suspended_tail.
method activeProcess { ^self.active }
method resume: aProcess { ^aProcess resume }
method(#primitive,#lenient) _processById: id.
method(#primitive) processById: id.
method resume: proc { ^proc resume }
}

61
moo/kernel/System.moo
View File

@ -45,7 +45,7 @@ class System(Apex)
method(#class) startup(class_name, method_name)
{
| class ret |
| class ret gcfin_proc ossig_proc |
self.asyncsg := SemaphoreGroup new.
@ -55,12 +55,14 @@ class System(Apex)
self error: ('Cannot find the class - ' & class_name).
}.
// start the gc finalizer process
[ self __gc_finalizer ] fork.
// start the os signal handler process
// start the gc finalizer process and os signal handler process
//[ self __gc_finalizer ] fork.
//[ self __os_sig_handler ] fork.
[ :caller | self __os_sig_handler: caller ] newProcess(thisProcess) resume.
gcfin_proc := [ self __gc_finalizer ] newProcess.
ossig_proc := [ :caller | self __os_sig_handler: caller ] newProcess(thisProcess).
gcfin_proc resume.
ossig_proc resume.
[
// TODO: change the method signature to variadic and pass extra arguments to perform???
@ -159,41 +161,36 @@ class System(Apex)
// the caller must request to terminate all its child processes..
// TODO: to avoid this, this process must enumerate all proceses and terminate them except this and gcfin process
/* TODO: redo the following process termination loop.
need to write a proper process enumeration methods.
0 -> startup <--- this should also be stored in the 'caller' variable.
1 -> __gc_finalizer
2 -> __os_signal_handler
3 -> application main
the following loops starts from pid 3 up to 100. this is POC only. i need to write a proper enumeration methods and use them.
*/
// this disables autonomous process switching only.
// TODO: check if the ensure block code can trigger process switching?
// whap happens if the ensure block creates new processes? this is likely to affect the termination loop below.
// even the id of the terminated process may get reused....
self _disableProcessSwitching.
//Processor _suspendUserProcesses. <--- keep kernel processes alive.
pid := 3.
while (pid < 100)
/*
0 -> startup <--- this should also be stored in the 'caller' variable.
1 -> __gc_finalizer
2 -> __os_signal_handler
3 .. -> other processes started by application.
*/
proc := System _findProcessByIdGreaterThan: 2.
while (proc notError)
{
proc := Processor _processById: pid.
if (proc notError and proc ~~ caller) { System logNl: ("Requesting to suspend process of id - " & pid asString). proc suspend }.
pid := pid + 1.
pid := proc id.
System logNl: ("Requesting to terminate process of id - " & pid asString).
proc terminate.
proc := System _findProcessByIdGreaterThan: pid.
}.
pid := 3.
while (pid < 100)
{
proc := Processor _processById: pid.
if (proc notError and proc ~~ caller) { System logNl: ("Requesting to terminate process of id - " & pid asString). proc terminate }.
pid := pid + 1.
}.
/* TODO: end redo */
caller terminate. // terminate the startup process.
self _enableProcessSwitching.
System logNl: '>>>>End of OS signal handler process ' & (thisProcess id) asString.
self.gcfin_should_exit := true.
self.gcfin_sem signal. // wake the gcfin process.
System _halting. // inform VM that it should get ready for halting.
self _halting. // inform VM that it should get ready for halting.
].
}
@ -201,6 +198,10 @@ class System(Apex)
method(#class,#primitive) _getSigfd.
method(#class,#primitive) _setSig: signo.
method(#class,#primitive) _halting.
method(#class,#primitive) _enableProcessSwitching.
method(#class,#primitive) _disableProcessSwitching.
method(#class,#primitive,#lenient) _findProcessById: id.
method(#class,#primitive,#lenient) _findProcessByIdGreaterThan: id.
method(#class,#primitive) _popCollectable.
method(#class,#primitive) collectGarbage.

146
moo/lib/exec.c
View File

@ -255,7 +255,7 @@ static MOO_INLINE int prepare_to_alloc_pid (moo_t* moo)
new_capa = MOO_SMOOI_MAX;
}
tmp = moo_reallocmem (moo, moo->proc_map, MOO_SIZEOF(moo_oop_t) * new_capa);
tmp = moo_reallocmem(moo, moo->proc_map, MOO_SIZEOF(moo_oop_t) * new_capa);
if (!tmp) return -1;
moo->proc_map_free_first = moo->proc_map_capa;
@ -1626,7 +1626,6 @@ static moo_oop_process_t start_initial_process (moo_t* moo, moo_oop_context_t c)
proc = make_process(moo, c);
if (!proc) return MOO_NULL;
MOO_OBJ_SET_CLASS(proc, moo->_kernel_process); /* the initial process is special */
chain_into_processor (moo, proc, PROC_STATE_RUNNING);
moo->processor->active = proc;
@ -2746,61 +2745,6 @@ static moo_pfrc_t pf_process_suspend (moo_t* moo, moo_mod_t* mod, moo_ooi_t narg
return MOO_PF_SUCCESS;
}
static moo_pfrc_t pf_process_scheduler_process_by_id (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_oop_t rcv, id;
moo_oop_process_t proc;
rcv = MOO_STACK_GETRCV(moo, nargs);
id = MOO_STACK_GETARG(moo, nargs, 0);
MOO_PF_CHECK_RCV (moo, rcv == (moo_oop_t)moo->processor);
if (MOO_OOP_IS_SMOOI(id))
{
proc = moo->processor->runnable.first;
while (proc)
{
if (proc->id == id)
{
MOO_STACK_SETRET (moo, nargs, (moo_oop_t)proc);
return MOO_PF_SUCCESS;
}
if (proc == moo->processor->runnable.last) break;
proc = proc->ps.next;
}
proc = moo->processor->suspended.first;
while (proc)
{
if (proc->id == id)
{
MOO_STACK_SETRET (moo, nargs, (moo_oop_t)proc);
return MOO_PF_SUCCESS;
}
if (proc == moo->processor->suspended.last) break;
proc = proc->ps.next;
}
}
MOO_STACK_SETRETTOERROR (moo, nargs, MOO_ENOENT);
return MOO_PF_FAILURE;
}
static moo_pfrc_t pf_process_scheduler_suspend_user_processes (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_oop_process_t proc;
while ((moo_oop_t)(proc = moo->processor->runnable.first) != moo->_nil)
{
/* exclude internal kernel classes. suspend user processes only */
if (MOO_CLASSOF(moo, proc) == moo->_process) suspend_process (moo, proc);
}
MOO_STACK_SETRETTORCV (moo, nargs);
return MOO_PF_SUCCESS;
}
/* ------------------------------------------------------------------ */
static moo_pfrc_t pf_semaphore_signal (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
@ -3281,6 +3225,20 @@ static moo_pfrc_t pf_system_return_value_to_context (moo_t* moo, moo_mod_t* mod,
}
/* ------------------------------------------------------------------ */
static moo_pfrc_t pf_system_enable_process_switching (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo->no_proc_switch = 0;
MOO_STACK_SETRETTORCV (moo, nargs);
return MOO_PF_SUCCESS;
}
static moo_pfrc_t pf_system_disable_process_switching (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo->no_proc_switch = 0;
MOO_STACK_SETRETTORCV (moo, nargs);
return MOO_PF_SUCCESS;
}
static moo_pfrc_t pf_system_halting (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_evtcb_t* cb;
@ -3292,6 +3250,71 @@ static moo_pfrc_t pf_system_halting (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs
return MOO_PF_SUCCESS;
}
static moo_pfrc_t pf_system_find_process_by_id (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_oop_t rcv, id;
moo_oop_process_t proc;
rcv = MOO_STACK_GETRCV(moo, nargs);
id = MOO_STACK_GETARG(moo, nargs, 0);
/*MOO_PF_CHECK_RCV (moo, rcv == (moo_oop_t)moo->processor);*/
if (MOO_OOP_IS_SMOOI(id))
{
moo_ooi_t index = MOO_OOP_TO_SMOOI(id);
if (index >= 0)
{
if (MOO_CLASSOF(moo, moo->proc_map[index]) == moo->_process)
{
MOO_STACK_SETRET (moo, nargs, moo->proc_map[index]);
return MOO_PF_SUCCESS;
}
/* it must be in a free list since the pid slot is not allocated. see alloc_pid() and free_pid() */
MOO_ASSERT (moo, MOO_OOP_IS_SMOOI(moo->proc_map[index]));
}
}
MOO_STACK_SETRETTOERROR (moo, nargs, MOO_ENOENT);
return MOO_PF_FAILURE;
}
static moo_pfrc_t pf_system_find_process_by_id_gt (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
moo_oop_t rcv, id;
moo_oop_process_t proc;
rcv = MOO_STACK_GETRCV(moo, nargs);
id = MOO_STACK_GETARG(moo, nargs, 0);
/*MOO_PF_CHECK_RCV (moo, rcv == (moo_oop_t)moo->processor);*/
if (MOO_OOP_IS_SMOOI(id))
{
moo_ooi_t index = MOO_OOP_TO_SMOOI(id);
if (index >= 0)
{
/* TOOD: enhance alloc_pid() and free_pid() to maintain the hightest pid number so that this loop can stop before reaching proc_map_capa */
for (++index; index < moo->proc_map_capa; index++)
{
if (MOO_CLASSOF(moo, moo->proc_map[index]) == moo->_process)
{
MOO_STACK_SETRET (moo, nargs, moo->proc_map[index]);
return MOO_PF_SUCCESS;
}
/* it must be in a free list since the pid slot is not allocated. see alloc_pid() and free_pid() */
MOO_ASSERT (moo, MOO_OOP_IS_SMOOI(moo->proc_map[index]));
}
}
}
MOO_STACK_SETRETTOERROR (moo, nargs, MOO_ENOENT);
return MOO_PF_FAILURE;
}
/* ------------------------------------------------------------------ */
static moo_pfrc_t pf_number_scale (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
{
@ -4333,9 +4356,6 @@ static pf_t pftab[] =
{ "MethodContext_findExceptionHandler:", { pf_context_find_exception_handler, 1, 1 } },
{ "MethodContext_goto:", { pf_context_goto, 1, 1 } },
{ "ProcessScheduler_processById:", { pf_process_scheduler_process_by_id, 1, 1 } },
{ "ProcessScheduler_suspendUserProcesses", { pf_process_scheduler_suspend_user_processes, 0, 0 } },
{ "Process_resume", { pf_process_resume, 0, 0 } },
{ "Process_sp", { pf_process_sp, 0, 0 } },
{ "Process_suspend", { pf_process_suspend, 0, 0 } },
@ -4386,6 +4406,10 @@ static pf_t pftab[] =
{ "System_calloc", { moo_pf_system_calloc, 1, 1 } },
{ "System_calloc:", { moo_pf_system_calloc, 1, 1 } },
{ "System_collectGarbage", { moo_pf_system_collect_garbage, 0, 0 } },
{ "System_disableProcessSwitching", { pf_system_disable_process_switching, 0, 0 } },
{ "System_enableProcessSwitching", { pf_system_enable_process_switching, 0, 0 } },
{ "System_findProcessById:", { pf_system_find_process_by_id, 1, 1 } },
{ "System_findProcessByIdGreaterThan:", { pf_system_find_process_by_id_gt, 1, 1 } },
{ "System_free", { moo_pf_system_free, 1, 1 } },
{ "System_free:", { moo_pf_system_free, 1, 1 } },
{ "System_gc", { moo_pf_system_collect_garbage, 0, 0 } },
@ -5472,7 +5496,7 @@ static int __execute (moo_t* moo)
BEGIN_DISPATCH_LOOP()
/* stop requested or no more runnable process */
if (moo->abort_req || switch_process_if_needed(moo) == 0) EXIT_DISPATCH_LOOP();
if (moo->abort_req || (!moo->no_proc_switch && switch_process_if_needed(moo) == 0)) EXIT_DISPATCH_LOOP();
#if defined(MOO_DEBUG_VM_EXEC)
moo->last_inst_pointer = moo->ip;

9
moo/lib/gc.c
View File

@ -282,15 +282,6 @@ static kernel_class_info_t kernel_classes[] =
MOO_OBJ_TYPE_OOP,
MOO_OFFSETOF(moo_t, _process) },
{ 14,
{ '_','K','e','r','n','e','l','P','r','o','c','e','s','s' },
MOO_CLASS_SELFSPEC_FLAG_FINAL | MOO_CLASS_SELFSPEC_FLAG_LIMITED,
0,
MOO_PROCESS_NAMED_INSTVARS,
MOO_CLASS_SPEC_FLAG_INDEXED,
MOO_OBJ_TYPE_OOP,
MOO_OFFSETOF(moo_t, _kernel_process) },
{ 9,
{ 'S','e','m','a','p','h','o','r','e' },
0,

2
moo/lib/moo.h
View File

@ -1547,7 +1547,6 @@ struct moo_t
moo_oop_class_t _method_context; /* MethodContext */
moo_oop_class_t _block_context; /* BlockContext */
moo_oop_class_t _process; /* Process */
moo_oop_class_t _kernel_process; /* KernelProcess */
moo_oop_class_t _semaphore; /* Semaphore */
moo_oop_class_t _semaphore_group; /* SemaphoreGroup */
moo_oop_class_t _process_scheduler; /* ProcessScheduler */
@ -1632,6 +1631,7 @@ struct moo_t
moo_oob_t* active_code;
moo_ooi_t sp;
moo_ooi_t ip;
int no_proc_switch; /* process switching disabled */
int proc_switched; /* TODO: this is temporary. implement something else to skip immediate context switching */
int switch_proc;
int abort_req;