fix garbage collector to handle multi-assigned variables and to not mess around
with cp_tr fields. git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1606 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
vsc
parent
9c12627e84
commit
9cbe63778e
104
C/heapgc.c
104
C/heapgc.c
@ -149,26 +149,17 @@ static rb_red_blk_node *db_root, *db_nil;
|
||||
static void
|
||||
gc_growtrail(int committed)
|
||||
{
|
||||
#if !GC_TAGS
|
||||
YAPLeaveCriticalSection();
|
||||
#endif
|
||||
#if USE_SYSTEM_MALLOC
|
||||
TR = OldTR;
|
||||
#endif
|
||||
save_machine_regs();
|
||||
longjmp(Yap_gc_restore, 2);
|
||||
#else
|
||||
if (!Yap_growtrail(64 * 1024L, TRUE)) {
|
||||
/* could not find more trail */
|
||||
longjmp(Yap_gc_restore, 2);
|
||||
}
|
||||
#if USE_SYSTEM_MALLOC
|
||||
#if !GC_NO_TAGS
|
||||
if (committed) {
|
||||
save_machine_regs();
|
||||
longjmp(Yap_gc_restore, 2);
|
||||
}
|
||||
#endif
|
||||
save_machine_regs();
|
||||
longjmp(Yap_gc_restore, 1);
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
@ -1640,8 +1631,21 @@ mark_trail(tr_fr_ptr trail_ptr, tr_fr_ptr trail_base, CELL *gc_H, choiceptr gc_B
|
||||
value.
|
||||
|
||||
*/
|
||||
if (cptr < (CELL *)gc_B && cptr >= gc_H) {
|
||||
goto remove_trash_entry;
|
||||
}
|
||||
if (!gc_lookup_ma_var(cptr, trail_base)) {
|
||||
/* check whether this is the first time we see it*/
|
||||
Term t0 = TrailTerm(trail_base+1);
|
||||
|
||||
if (!IsAtomicTerm(t0)) {
|
||||
CELL *next = GET_NEXT(t0);
|
||||
/* check if we have a garbage entry, where we are setting a
|
||||
pointer to ourselves. */
|
||||
if (next < (CELL *)gc_B && next >= gc_H) {
|
||||
goto remove_trash_entry;
|
||||
}
|
||||
}
|
||||
if (HEAP_PTR(trail_cell)) {
|
||||
/* fool the gc into thinking this is a variable */
|
||||
TrailTerm(trail_base) = (CELL)cptr;
|
||||
@ -1668,6 +1672,7 @@ mark_trail(tr_fr_ptr trail_ptr, tr_fr_ptr trail_base, CELL *gc_H, choiceptr gc_B
|
||||
#endif
|
||||
}
|
||||
} else {
|
||||
remove_trash_entry:
|
||||
/* we can safely ignore this little monster */
|
||||
discard_trail_entries += 3;
|
||||
RESET_VARIABLE(&TrailTerm(trail_base));
|
||||
@ -1806,16 +1811,8 @@ mark_choicepoints(register choiceptr gc_B, tr_fr_ptr saved_TR, int very_verbose)
|
||||
}
|
||||
{
|
||||
/* find out how many cells are still alive in the trail */
|
||||
#ifndef FROZEN_STACKS
|
||||
UInt d0 = discard_trail_entries, diff, orig;
|
||||
orig = saved_TR-gc_B->cp_tr;
|
||||
#endif
|
||||
mark_trail(saved_TR, gc_B->cp_tr, gc_B->cp_h, gc_B);
|
||||
saved_TR = gc_B->cp_tr;
|
||||
#ifndef FROZEN_STACKS
|
||||
diff = discard_trail_entries-d0;
|
||||
gc_B->cp_tr = (tr_fr_ptr)(orig-diff);
|
||||
#endif /* FROZEN_STACKS */
|
||||
}
|
||||
if (opnum == _or_else || opnum == _or_last) {
|
||||
/* ; choice point */
|
||||
@ -2191,17 +2188,44 @@ sweep_trail(choiceptr gc_B, tr_fr_ptr old_TR)
|
||||
#endif
|
||||
|
||||
#ifndef FROZEN_STACKS
|
||||
/*
|
||||
adjust cp_tr pointers,
|
||||
we don't compress TR if we have freeze.
|
||||
*/
|
||||
{
|
||||
Int size = old_TR-(tr_fr_ptr)Yap_TrailBase;
|
||||
size -= discard_trail_entries;
|
||||
while (gc_B != NULL) {
|
||||
size -= (UInt)(gc_B->cp_tr);
|
||||
gc_B->cp_tr = (tr_fr_ptr)Yap_TrailBase+size;
|
||||
gc_B = gc_B->cp_b;
|
||||
choiceptr current = gc_B;
|
||||
choiceptr next = gc_B->cp_b;
|
||||
tr_fr_ptr source, dest;
|
||||
|
||||
/* invert cp ptrs */
|
||||
current->cp_b = NULL;
|
||||
while (next) {
|
||||
choiceptr n = next;
|
||||
next = n->cp_b;
|
||||
n->cp_b = current;
|
||||
current = n;
|
||||
}
|
||||
|
||||
next = current;
|
||||
current = NULL;
|
||||
/* next, clean trail */
|
||||
source = dest = (tr_fr_ptr)Yap_TrailBase;
|
||||
while (source < old_TR) {
|
||||
while (next && source == next->cp_tr) {
|
||||
choiceptr b = next;
|
||||
b->cp_tr = dest;
|
||||
next = b->cp_b;
|
||||
b->cp_b = current;
|
||||
current = b;
|
||||
}
|
||||
CELL trail_cell = TrailTerm(source);
|
||||
if (trail_cell != (CELL)source) {
|
||||
dest++;
|
||||
}
|
||||
source++;
|
||||
}
|
||||
while (next) {
|
||||
choiceptr b = next;
|
||||
b->cp_tr = dest;
|
||||
next = b->cp_b;
|
||||
b->cp_b = current;
|
||||
current = b;
|
||||
}
|
||||
}
|
||||
#endif /* FROZEN_STACKS */
|
||||
@ -3398,23 +3422,23 @@ marking_phase(tr_fr_ptr old_TR, CELL *current_env, yamop *curp, CELL *max)
|
||||
|
||||
#ifdef EASY_SHUNTING
|
||||
current_B = B;
|
||||
prev_HB = H;
|
||||
#endif
|
||||
init_dbtable(old_TR);
|
||||
#ifdef EASY_SHUNTING
|
||||
sTR0 = (tr_fr_ptr)db_vec;
|
||||
sTR = (tr_fr_ptr)db_vec;
|
||||
/* make sure we set HB before we do any variable shunting!!! */
|
||||
HB = H;
|
||||
#else
|
||||
cont_top0 = (cont *)db_vec;
|
||||
#endif
|
||||
cont_top = (cont *)db_vec;
|
||||
/* These two must be marked first so that our trail optimisation won't lose
|
||||
values */
|
||||
mark_regs(old_TR); /* active registers & trail */
|
||||
#ifdef COROUTINING
|
||||
mark_delays(max);
|
||||
#endif
|
||||
/* These two must be marked first so that our trail optimisation won't lose
|
||||
values */
|
||||
mark_regs(old_TR); /* active registers & trail */
|
||||
/* active environments */
|
||||
mark_environments(current_env, EnvSize(curp), EnvBMap((CELL *)curp));
|
||||
mark_choicepoints(B, old_TR, is_gc_very_verbose()); /* choicepoints, and environs */
|
||||
@ -3665,6 +3689,12 @@ do_gc(Int predarity, CELL *current_env, yamop *nextop)
|
||||
return 0;
|
||||
#endif
|
||||
} else {
|
||||
total_marked = 0;
|
||||
total_oldies = 0;
|
||||
#ifdef COROUTING
|
||||
total_smarked = 0;
|
||||
#endif
|
||||
discard_trail_entries = 0;
|
||||
current_env = (CELL *)*ASP;
|
||||
ASP++;
|
||||
#if COROUTINING
|
||||
@ -3683,9 +3713,6 @@ do_gc(Int predarity, CELL *current_env, yamop *nextop)
|
||||
HGEN = H0;
|
||||
}
|
||||
/* fprintf(stderr,"HGEN is %ld, %p, %p/%p\n", IntegerOfTerm(Yap_ReadTimedVar(GcGeneration)), HGEN, H,H0);*/
|
||||
#if !GC_TAGS
|
||||
YAPEnterCriticalSection();
|
||||
#endif
|
||||
OldTR = (tr_fr_ptr)(old_TR = TR);
|
||||
push_registers(predarity, nextop);
|
||||
marking_phase(old_TR, current_env, nextop, max);
|
||||
@ -3732,9 +3759,6 @@ do_gc(Int predarity, CELL *current_env, yamop *nextop)
|
||||
TR = old_TR;
|
||||
pop_registers(predarity, nextop);
|
||||
TR = new_TR;
|
||||
#if !GC_TAGS
|
||||
YAPLeaveCriticalSection();
|
||||
#endif
|
||||
/* fprintf(Yap_stderr,"NEW HGEN %ld (%ld)\n", H-H0, HGEN-H0);*/
|
||||
Yap_UpdateTimedVar(GcGeneration, MkIntegerTerm(H-H0));
|
||||
Yap_UpdateTimedVar(GcPhase, MkIntegerTerm(GcCurrentPhase));
|
||||
|
||||
@ -137,6 +137,10 @@ low_level_trace(yap_low_level_port port, PredEntry *pred, CELL *args)
|
||||
LOCK(Yap_heap_regs->low_level_trace_lock);
|
||||
sc = Yap_heap_regs;
|
||||
vsc_count++;
|
||||
// if (vsc_count < 13600) {
|
||||
// UNLOCK(Yap_heap_regs->low_level_trace_lock);
|
||||
// return;
|
||||
// }
|
||||
#ifdef COMMENTED
|
||||
// if (vsc_count == 218280)
|
||||
// vsc_xstop = 1;
|
||||
|
||||
@ -16,6 +16,11 @@
|
||||
|
||||
<h2>Yap-5.1.2:</h2>
|
||||
<ul>
|
||||
<li> FIXED: garbage collector should no rewrite cp_tr fields until
|
||||
after marking (obs Paulo Moura).</li>
|
||||
<li> FIXED: garbage collector was allowing garbage trail entries for
|
||||
multi-assignment variables. Namely, old var value might point to new space
|
||||
(obs Paulo Moura).</li>
|
||||
<li> FIXED: thread aliases were being cleaned up just after being
|
||||
installed (obs Paulo Moura).</li>
|
||||
<li> FIXED: rb_partial_map was broken.</li>
|
||||
|
||||
Reference in New Issue
Block a user