-/* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2007-2019. 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. */
namespace simgrid {
namespace mc {
-static inline const char* to_cstr(RegionType region)
-{
- switch (region) {
- case RegionType::Unknown:
- return "unknown";
- case RegionType::Heap:
- return "Heap";
- case RegionType::Data:
- return "Data";
- default:
- return "?";
- }
-}
-
-Buffer::Buffer(std::size_t size, Type type) : size_(size), type_(type)
-{
- switch (type_) {
- case Type::Malloc:
- data_ = ::operator new(size_);
- break;
- case Type::Mmap:
- data_ = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
- if (data_ == MAP_FAILED) {
- data_ = nullptr;
- size_ = 0;
- type_ = Type::Malloc;
- throw std::bad_alloc();
- }
- break;
- default:
- abort();
- }
-}
-
-void Buffer::clear() noexcept
-{
- switch (type_) {
- case Type::Malloc:
- ::operator delete(data_);
- break;
- case Type::Mmap:
- if (munmap(data_, size_) != 0)
- abort();
- break;
- default:
- abort();
- }
- data_ = nullptr;
- size_ = 0;
- type_ = Type::Malloc;
-}
-
RegionSnapshot dense_region(RegionType region_type, void* start_addr, void* permanent_addr, size_t size)
{
- // When KSM support is enables, we allocate memory using mmap:
- // * we don't want to advise bits of the heap as mergable
- // * mmap gives data aligned on page boundaries which is merge friendly
- simgrid::mc::Buffer data;
- if (_sg_mc_ksm)
- data = Buffer::mmap(size);
- else
- data = Buffer::malloc(size);
+ simgrid::mc::Buffer data = Buffer::malloc(size);
mc_model_checker->process().read_bytes(data.get(), size, remote(permanent_addr), simgrid::mc::ProcessIndexDisabled);
-#ifdef __linux__
- if (_sg_mc_ksm)
- // Mark the region as mergeable *after* we have written into it.
- // Trying to merge them before is useless/counterproductive.
- madvise(data.get(), size, MADV_MERGEABLE);
-#endif
-
simgrid::mc::RegionSnapshot region(region_type, start_addr, permanent_addr, size);
region.flat_data(std::move(data));
- XBT_DEBUG("New region : type : %s, data : %p (real addr %p), size : %zu", to_cstr(region_type),
+ XBT_DEBUG("New region : type : %s, data : %p (real addr %p), size : %zu",
+ (region_type == RegionType::Heap ? "Heap" : (region_type == RegionType::Data ? "Data" : "?")),
region.flat_data().get(), permanent_addr, size);
return region;
}
simgrid::mc::RemoteClient* process = &mc_model_checker->process();
assert(process != nullptr);
- 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 = simgrid::mc::mmu::chunkCount(size);
+ xbt_assert((((uintptr_t)start_addr) & (xbt_pagesize - 1)) == 0, "Start address not at the beginning of a page");
+ xbt_assert((((uintptr_t)permanent_addr) & (xbt_pagesize - 1)) == 0,
+ "Permanent address not at the beginning of a page");
+ size_t page_count = simgrid::mc::mmu::chunk_count(size);
simgrid::mc::ChunkedData page_data(mc_model_checker->page_store(), *process, RemotePtr<void>(permanent_addr),
page_count);