// locate an exiting record that contains specified address, or
// the record, where the record with specified address, should
// be inserted
virtual MemPointer* locate(address addr) {
VMMemRegion* cur = (VMMemRegion*)current();
VMMemRegion* next_p;
while (cur != NULL) {
if (cur->base() > addr) {
return cur;
} else {
// find nearest existing range that has base address <= addr
next_p = (VMMemRegion*)peek_next();
if (next_p != NULL && next_p->base() <= addr) {
cur = (VMMemRegion*)next();
continue;
}
}
if (cur->is_reserve_record() &&
cur->base() <= addr &&
(cur->base() + cur->size() > addr)) {
return cur;
} else if (cur->is_commit_record() &&
cur->base() <= addr &&
(cur->base() + cur->committed_size() > addr)) {
return cur;
}
cur = (VMMemRegion*)next();
}
return NULL;
}
bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
// skip all 'commit' records associated with previous reserved region
VMMemRegion* p = (VMMemRegion*)next();
while (p != NULL && p->is_committed_region() &&
p->base() + p->size() < rec->addr()) {
p = (VMMemRegion*)next();
}
return insert_record(rec);
}
// locate an existing reserved memory region that contains specified address,
// or the reserved region just above this address, where the incoming
// reserved region should be inserted.
virtual MemPointer* locate(address addr) {
reset();
VMMemRegion* reg = (VMMemRegion*)current();
while (reg != NULL) {
if (reg->is_reserved_region()) {
if (reg->contains_address(addr) || addr < reg->base()) {
return reg;
}
}
reg = (VMMemRegion*)next();
}
return NULL;
}
