bool ReservedMemoryRegion::add_committed_region(address addr, size_t size, const NativeCallStack& stack) {
assert(addr != NULL, "Invalid address");
assert(size > 0, "Invalid size");
assert(contain_region(addr, size), "Not contain this region");
if (all_committed()) return true;
CommittedMemoryRegion committed_rgn(addr, size, stack);
LinkedListNode<CommittedMemoryRegion>* node = _committed_regions.find_node(committed_rgn);
if (node != NULL) {
CommittedMemoryRegion* rgn = node->data();
if (rgn->same_region(addr, size)) {
return true;
}
if (rgn->adjacent_to(addr, size)) {
// check if the next region covers this committed region,
// the regions may not be merged due to different call stacks
LinkedListNode<CommittedMemoryRegion>* next =
node->next();
if (next != NULL && next->data()->contain_region(addr, size)) {
if (next->data()->same_region(addr, size)) {
next->data()->set_call_stack(stack);
}
return true;
}
if (rgn->call_stack()->equals(stack)) {
VirtualMemorySummary::record_uncommitted_memory(rgn->size(), flag());
// the two adjacent regions have the same call stack, merge them
rgn->expand_region(addr, size);
VirtualMemorySummary::record_committed_memory(rgn->size(), flag());
return true;
}
VirtualMemorySummary::record_committed_memory(size, flag());
if (rgn->base() > addr) {
return _committed_regions.insert_before(committed_rgn, node) != NULL;
} else {
return _committed_regions.insert_after(committed_rgn, node) != NULL;
}
}
assert(rgn->contain_region(addr, size), "Must cover this region");
return true;
} else {
// New committed region
VirtualMemorySummary::record_committed_memory(size, flag());
return add_committed_region(committed_rgn);
}
}
bool ReservedMemoryRegion::add_committed_region(address addr, size_t size, const NativeCallStack& stack) {
assert(addr != NULL, "Invalid address");
assert(size > 0, "Invalid size");
assert(contain_region(addr, size), "Not contain this region");
if (all_committed()) return true;
CommittedMemoryRegion committed_rgn(addr, size, stack);
LinkedListNode<CommittedMemoryRegion>* node = _committed_regions.head();
while (node != NULL) {
CommittedMemoryRegion* rgn = node->data();
if (rgn->same_region(addr, size)) {
return true;
}
if (rgn->adjacent_to(addr, size)) {
// special case to expand prior region if there is no next region
LinkedListNode<CommittedMemoryRegion>* next = node->next();
if (next == NULL && rgn->call_stack()->equals(stack)) {
VirtualMemorySummary::record_uncommitted_memory(rgn->size(), flag());
// the two adjacent regions have the same call stack, merge them
rgn->expand_region(addr, size);
VirtualMemorySummary::record_committed_memory(rgn->size(), flag());
return true;
}
}
if (rgn->overlap_region(addr, size)) {
// Clear a space for this region in the case it overlaps with any regions.
remove_uncommitted_region(addr, size);
break; // commit below
}
if (rgn->end() >= addr + size){
break;
}
node = node->next();
}
// New committed region
VirtualMemorySummary::record_committed_memory(size, flag());
return add_committed_region(committed_rgn);
}
