void
LDV_recordDead( StgClosure *c, nat size )
{
void *id;
nat t;
counter *ctr;
if (era > 0 && closureSatisfiesConstraints(c)) {
size -= sizeofW(StgProfHeader);
ASSERT(LDVW(c) != 0);
if ((LDVW((c)) & LDV_STATE_MASK) == LDV_STATE_CREATE) {
t = (LDVW((c)) & LDV_CREATE_MASK) >> LDV_SHIFT;
if (t < era) {
if (RtsFlags.ProfFlags.bioSelector == NULL) {
censuses[t].void_total += (long)size;
censuses[era].void_total -= (long)size;
ASSERT(censuses[t].void_total < censuses[t].not_used);
} else {
id = closureIdentity(c);
ctr = lookupHashTable(censuses[t].hash, (StgWord)id);
ASSERT( ctr != NULL );
ctr->c.ldv.void_total += (long)size;
ctr = lookupHashTable(censuses[era].hash, (StgWord)id);
if (ctr == NULL) {
ctr = arenaAlloc(censuses[era].arena, sizeof(counter));
initLDVCtr(ctr);
insertHashTable(censuses[era].hash, (StgWord)id, ctr);
ctr->identity = id;
ctr->next = censuses[era].ctrs;
censuses[era].ctrs = ctr;
}
ctr->c.ldv.void_total -= (long)size;
}
}
} else {
STATIC_INLINE GNUC_ATTR_HOT void
copy_tag(StgClosure **p, const StgInfoTable *info,
StgClosure *src, nat size, nat gen_no, StgWord tag)
{
StgPtr to, from;
nat i;
to = alloc_for_copy(size,gen_no);
from = (StgPtr)src;
to[0] = (W_)info;
for (i = 1; i < size; i++) { // unroll for small i
to[i] = from[i];
}
// if (to+size+2 < bd->start + BLOCK_SIZE_W) {
// __builtin_prefetch(to + size + 2, 1);
// }
#if defined(PARALLEL_GC)
{
const StgInfoTable *new_info;
new_info = (const StgInfoTable *)cas((StgPtr)&src->header.info, (W_)info, MK_FORWARDING_PTR(to));
if (new_info != info) {
#ifdef PROFILING
// We copied this object at the same time as another
// thread. We'll evacuate the object again and the copy
// we just made will be discarded at the next GC, but we
// may have copied it after the other thread called
// SET_EVACUAEE_FOR_LDV(), which would confuse the LDV
// profiler when it encounters this closure in
// processHeapClosureForDead. So we reset the LDVW field
// here.
LDVW(to) = 0;
#endif
return evacuate(p); // does the failed_to_evac stuff
} else {
*p = TAG_CLOSURE(tag,(StgClosure*)to);
}
}
#else
src->header.info = (const StgInfoTable *)MK_FORWARDING_PTR(to);
*p = TAG_CLOSURE(tag,(StgClosure*)to);
#endif
#ifdef PROFILING
// We store the size of the just evacuated object in the LDV word so that
// the profiler can guess the position of the next object later.
// This is safe only if we are sure that no other thread evacuates
// the object again, so we cannot use copy_tag_nolock when PROFILING.
SET_EVACUAEE_FOR_LDV(from, size);
#endif
}
