/* MC interface: definitions that non-MC modules must see, but not the user */
-/* Copyright (c) 2014-2015. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2014-2015. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include <xbt/mmalloc.h>
+#define SOFT_DIRTY_BIT_NUMBER 55
+#define SOFT_DIRTY (((uint64_t)1) << SOFT_DIRTY_BIT_NUMBER)
+
using simgrid::mc::remote;
namespace simgrid {
* @return Snapshot page numbers of this new snapshot
*/
PerPageCopy::PerPageCopy(PageStore& store, AddressSpace& as,
- remote_ptr<void> addr, std::size_t page_count)
+ remote_ptr<void> addr, std::size_t page_count,
+ const size_t* ref_page_numbers, const std::uint64_t* pagemap)
{
store_ = &store;
this->pagenos_.resize(page_count);
for (size_t i = 0; i != page_count; ++i) {
+ // We don't have to compare soft-clean pages:
+ if (ref_page_numbers && pagemap && !(pagemap[i] & SOFT_DIRTY)) {
+ pagenos_[i] = ref_page_numbers[i];
+ store_->ref_page(ref_page_numbers[i]);
+ continue;
+ }
+
remote_ptr<void> page = remote(addr.address() + (i << xbt_pagebits));
xbt_assert(mc_page_offset((void*)page.address())==0,
"Not at the beginning of a page");
* @param page_count Number of pages of the region
* @param pagenos
*/
-void mc_restore_page_snapshot_region(mc_process_t process,
+void mc_restore_page_snapshot_region(simgrid::mc::Process* process,
void* start_addr, simgrid::mc::PerPageCopy const& pages_copy)
{
for (size_t i = 0; i != pages_copy.page_count(); ++i) {
// ***** High level API
-mc_mem_region_t mc_region_new_sparse(mc_region_type_t region_type,
- void *start_addr, void* permanent_addr, size_t size)
-{
- mc_process_t process = &mc_model_checker->process();
-
- mc_mem_region_t region = new simgrid::mc::RegionSnapshot();
- region->region_type = region_type;
- region->storage_type = MC_REGION_STORAGE_TYPE_CHUNKED;
- region->start_addr = start_addr;
- region->permanent_addr = permanent_addr;
- region->size = size;
-
- xbt_assert((((uintptr_t)start_addr) & (xbt_pagesize-1)) == 0,
- "Not at the beginning of a page");
- xbt_assert((((uintptr_t)permanent_addr) & (xbt_pagesize-1)) == 0,
- "Not at the beginning of a page");
- size_t page_count = mc_page_count(size);
-
- // Take incremental snapshot:
- region->page_numbers_ = simgrid::mc::PerPageCopy(mc_model_checker->page_store(), *process,
- permanent_addr, page_count);
-
- return region;
-}
-
-void mc_region_restore_sparse(mc_process_t process, mc_mem_region_t reg)
+void mc_region_restore_sparse(simgrid::mc::Process* process, mc_mem_region_t reg)
{
- xbt_assert((((uintptr_t)reg->permanent_addr) & (xbt_pagesize-1)) == 0,
+ xbt_assert(((reg->permanent_address().address()) & (xbt_pagesize-1)) == 0,
"Not at the beginning of a page");
- xbt_assert(mc_page_count(reg->size) == reg->page_numbers_.page_count());
+ xbt_assert(mc_page_count(reg->size()) == reg->page_data().page_count());
mc_restore_page_snapshot_region(process,
- reg->permanent_addr, reg->page_numbers_);
+ (void*) reg->permanent_address().address(), reg->page_data());
}
}