1 /* MC interface: definitions that non-MC modules must see, but not the user */
3 /* Copyright (c) 2014-2015. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include <unistd.h> // pread, pwrite
11 #include "PageStore.hpp"
13 #include "mc_private.h"
14 #include "mc_snapshot.h"
16 #include <xbt/mmalloc.h>
17 #include <mc/ChunkedData.hpp>
19 using simgrid::mc::remote;
23 /** @brief Restore a snapshot of a region
25 * If possible, the restoration will be incremental
26 * (the modified pages will not be touched).
29 * @param page_count Number of pages of the region
32 void mc_restore_page_snapshot_region(simgrid::mc::Process* process,
33 void* start_addr, simgrid::mc::ChunkedData const& pages_copy)
35 for (size_t i = 0; i != pages_copy.page_count(); ++i) {
36 // Otherwise, copy the page:
37 void* target_page = mc_page_from_number(start_addr, i);
38 const void* source_page = pages_copy.page(i);
39 process->write_bytes(source_page, xbt_pagesize, remote(target_page));
43 // ***** High level API
45 void mc_region_restore_sparse(simgrid::mc::Process* process, mc_mem_region_t reg)
47 xbt_assert(((reg->permanent_address().address()) & (xbt_pagesize-1)) == 0,
48 "Not at the beginning of a page");
49 xbt_assert(mc_page_count(reg->size()) == reg->page_data().page_count());
50 mc_restore_page_snapshot_region(process,
51 (void*) reg->permanent_address().address(), reg->page_data());