// 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;
}
