1 /* Copyright (c) 2014-2018. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 /* MC interface: definitions that non-MC modules must see, but not the user */
10 #include <unistd.h> // pread, pwrite
12 #include "src/mc/PageStore.hpp"
13 #include "src/mc/mc_mmu.hpp"
14 #include "src/mc/mc_private.hpp"
15 #include "src/mc/mc_snapshot.hpp"
17 #include <xbt/mmalloc.h>
18 #include "src/mc/ChunkedData.hpp"
20 using simgrid::mc::remote;
22 /** @brief Restore a snapshot of a region
24 * If possible, the restoration will be incremental
25 * (the modified pages will not be touched).
28 * @param page_count Number of pages of the region
31 void mc_restore_page_snapshot_region(simgrid::mc::RemoteClient* process, void* start_addr,
32 simgrid::mc::ChunkedData const& pages_copy)
34 for (size_t i = 0; i != pages_copy.page_count(); ++i) {
35 // Otherwise, copy the page:
36 void* target_page = (void*) simgrid::mc::mmu::join(i, (std::uintptr_t) start_addr);
37 const void* source_page = pages_copy.page(i);
38 process->write_bytes(source_page, xbt_pagesize, remote(target_page));
42 // ***** High level API
44 void mc_region_restore_sparse(simgrid::mc::RemoteClient* process, mc_mem_region_t reg)
46 xbt_assert(((reg->permanent_address().address()) & (xbt_pagesize-1)) == 0,
47 "Not at the beginning of a page");
48 xbt_assert(simgrid::mc::mmu::chunkCount(reg->size()) == reg->page_data().page_count());
49 mc_restore_page_snapshot_region(process,
50 (void*) reg->permanent_address().address(), reg->page_data());