X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e709643ef0c5b61c6c878016c418bffa2b1b20cd..HEAD:/src/mc/sosp/Region.cpp

diff --git a/src/mc/sosp/Region.cpp b/src/mc/sosp/Region.cpp
deleted file mode 100644
index 653586c047..0000000000
--- a/src/mc/sosp/Region.cpp
+++ /dev/null
@@ -1,126 +0,0 @@
-/* Copyright (c) 2007-2020. 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 "src/mc/ModelChecker.hpp"
-#include "src/mc/mc_config.hpp"
-#include "src/mc/mc_forward.hpp"
-
-#include "src/mc/mc_smx.hpp"
-#include "src/mc/sosp/Region.hpp"
-
-#include <cstdlib>
-#include <sys/mman.h>
-#ifdef __FreeBSD__
-#define MAP_POPULATE MAP_PREFAULT_READ
-#endif
-
-namespace simgrid {
-namespace mc {
-
-Region::Region(RegionType region_type, void* start_addr, size_t size)
-    : region_type_(region_type), start_addr_(start_addr), size_(size)
-{
-  xbt_assert((((uintptr_t)start_addr) & (xbt_pagesize - 1)) == 0, "Start address not at the beginning of a page");
-
-  chunks_ = ChunkedData(mc_model_checker->page_store(), mc_model_checker->get_remote_simulation(),
-                        RemotePtr<void>(start_addr), mmu::chunk_count(size));
-}
-
-/** @brief Restore a region from a snapshot
- *
- *  @param region     Target region
- */
-void Region::restore() const
-{
-  xbt_assert(((start().address()) & (xbt_pagesize - 1)) == 0, "Not at the beginning of a page");
-  xbt_assert(simgrid::mc::mmu::chunk_count(size()) == get_chunks().page_count());
-
-  for (size_t i = 0; i != get_chunks().page_count(); ++i) {
-    void* target_page       = (void*)simgrid::mc::mmu::join(i, (std::uintptr_t)(void*)start().address());
-    const void* source_page = get_chunks().page(i);
-    mc_model_checker->get_remote_simulation().write_bytes(source_page, xbt_pagesize, remote(target_page));
-  }
-}
-
-static XBT_ALWAYS_INLINE void* mc_translate_address_region(uintptr_t addr, const simgrid::mc::Region* region)
-{
-  auto split                = simgrid::mc::mmu::split(addr - region->start().address());
-  auto pageno               = split.first;
-  auto offset               = split.second;
-  void* snapshot_page       = region->get_chunks().page(pageno);
-  return (char*)snapshot_page + offset;
-}
-
-void* Region::read(void* target, const void* addr, std::size_t size) const
-{
-  xbt_assert(contain(simgrid::mc::remote(addr)), "Trying to read out of the region boundary.");
-
-  // Last byte of the region:
-  const void* end = (const char*)addr + size - 1;
-  if (simgrid::mc::mmu::same_chunk((std::uintptr_t)addr, (std::uintptr_t)end)) {
-    // The memory is contained in a single page:
-    return mc_translate_address_region((uintptr_t)addr, this);
-  }
-  // Otherwise, the memory spans several pages. Let's copy it all into the provided buffer
-  xbt_assert(target != nullptr, "Missing destination buffer for fragmented memory access");
-
-  // TODO, we assume the chunks are aligned to natural chunk boundaries.
-  // We should remove this assumption.
-
-  // Page of the last byte of the memory area:
-  size_t page_end = simgrid::mc::mmu::split((std::uintptr_t)end).first;
-
-  void* dest = target; // iterator in the buffer to where we should copy next
-
-  // Read each page:
-  while (simgrid::mc::mmu::split((std::uintptr_t)addr).first != page_end) {
-    const void* snapshot_addr = mc_translate_address_region((uintptr_t)addr, this);
-    void* next_page     = (void*)simgrid::mc::mmu::join(simgrid::mc::mmu::split((std::uintptr_t)addr).first + 1, 0);
-    size_t readable     = (char*)next_page - (const char*)addr;
-    memcpy(dest, snapshot_addr, readable);
-    addr = (const char*)addr + readable;
-    dest = (char*)dest + readable;
-    size -= readable;
-  }
-
-  // Read the end:
-  const void* snapshot_addr = mc_translate_address_region((uintptr_t)addr, this);
-  memcpy(dest, snapshot_addr, size);
-
-  return target;
-}
-
-} // namespace mc
-} // namespace simgrid
-
-/** Compare memory between snapshots (with known regions)
- *
- * @param addr1 Address in the first snapshot
- * @param region1 Region of the address in the first snapshot
- * @param addr2 Address in the second snapshot
- * @param region2 Region of the address in the second snapshot
- * @return same semantic as memcmp
- */
-int MC_snapshot_region_memcmp(const void* addr1, const simgrid::mc::Region* region1, const void* addr2,
-                              const simgrid::mc::Region* region2, size_t size)
-{
-  // Using alloca() for large allocations may trigger stack overflow:
-  // use malloc if the buffer is too big.
-  bool stack_alloc    = size < 64;
-  void* buffer1a      = stack_alloc ? alloca(size) : ::operator new(size);
-  void* buffer2a      = stack_alloc ? alloca(size) : ::operator new(size);
-  const void* buffer1 = region1->read(buffer1a, addr1, size);
-  const void* buffer2 = region2->read(buffer2a, addr2, size);
-  int res;
-  if (buffer1 == buffer2)
-    res = 0;
-  else
-    res = memcmp(buffer1, buffer2, size);
-  if (not stack_alloc) {
-    ::operator delete(buffer1a);
-    ::operator delete(buffer2a);
-  }
-  return res;
-}