+++ /dev/null
-/* Copyright (c) 2007-2018. 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. */
-
-#ifndef SIMGRID_MC_SNAPSHOT_HPP
-#define SIMGRID_MC_SNAPSHOT_HPP
-
-#include "src/mc/ModelChecker.hpp"
-#include "src/mc/RegionSnapshot.hpp"
-#include "src/mc/mc_unw.hpp"
-#include "src/mc/remote/RemoteClient.hpp"
-
-// ***** Snapshot region
-
-XBT_PRIVATE void mc_region_restore_sparse(simgrid::mc::RemoteClient* process, mc_mem_region_t reg);
-
-static XBT_ALWAYS_INLINE void* mc_translate_address_region_chunked(uintptr_t addr, mc_mem_region_t region)
-{
- auto split = simgrid::mc::mmu::split(addr - region->start().address());
- auto pageno = split.first;
- auto offset = split.second;
- const void* snapshot_page = region->page_data().page(pageno);
- return (char*)snapshot_page + offset;
-}
-
-static XBT_ALWAYS_INLINE void* mc_translate_address_region(uintptr_t addr, mc_mem_region_t region, int process_index)
-{
- switch (region->storage_type()) {
- case simgrid::mc::StorageType::Flat: {
- uintptr_t offset = (uintptr_t)addr - (uintptr_t)region->start().address();
- return (void*)((uintptr_t)region->flat_data().get() + offset);
- }
- case simgrid::mc::StorageType::Chunked:
- return mc_translate_address_region_chunked(addr, region);
- case simgrid::mc::StorageType::Privatized: {
- xbt_assert(process_index >= 0, "Missing process index for privatized region");
- xbt_assert((size_t)process_index < region->privatized_data().size(), "Out of range process index");
- simgrid::mc::RegionSnapshot& subregion = region->privatized_data()[process_index];
- return mc_translate_address_region(addr, &subregion, process_index);
- }
- default: // includes StorageType::NoData
- xbt_die("Storage type not supported");
- }
-}
-
-XBT_PRIVATE mc_mem_region_t mc_get_snapshot_region(const void* addr, const simgrid::mc::Snapshot* snapshot,
- int process_index);
-
-// ***** MC Snapshot
-
-/** Ignored data
- *
- * Some parts of the snapshot are ignored by zeroing them out: the real
- * values is stored here.
- * */
-struct s_mc_snapshot_ignored_data_t {
- void* start;
- std::vector<char> data;
-};
-
-struct s_fd_infos_t {
- std::string filename;
- int number;
- off_t current_position;
- int flags;
-};
-
-/** Information about a given stack frame */
-struct s_mc_stack_frame_t {
- /** Instruction pointer */
- unw_word_t ip;
- /** Stack pointer */
- unw_word_t sp;
- unw_word_t frame_base;
- simgrid::mc::Frame* frame;
- std::string frame_name;
- unw_cursor_t unw_cursor;
-};
-typedef s_mc_stack_frame_t* mc_stack_frame_t;
-
-struct s_local_variable_t {
- simgrid::mc::Frame* subprogram;
- unsigned long ip;
- std::string name;
- simgrid::mc::Type* type;
- void* address;
- int region;
-};
-typedef s_local_variable_t* local_variable_t;
-
-struct XBT_PRIVATE s_mc_snapshot_stack_t {
- std::vector<s_local_variable_t> local_variables;
- simgrid::mc::UnwindContext context;
- std::vector<s_mc_stack_frame_t> stack_frames;
- int process_index;
-};
-typedef s_mc_snapshot_stack_t* mc_snapshot_stack_t;
-
-namespace simgrid {
-namespace mc {
-
-class XBT_PRIVATE Snapshot final : public AddressSpace {
-public:
- Snapshot(RemoteClient* process, int num_state);
- ~Snapshot() = default;
- const void* read_bytes(void* buffer, std::size_t size, RemotePtr<void> address, int process_index = ProcessIndexAny,
- ReadOptions options = ReadOptions::none()) const override;
-
- // To be private
- int num_state;
- std::size_t heap_bytes_used;
- std::vector<std::unique_ptr<s_mc_mem_region_t>> snapshot_regions;
- std::set<pid_t> enabled_processes;
- int privatization_index;
- std::vector<std::size_t> stack_sizes;
- std::vector<s_mc_snapshot_stack_t> stacks;
- std::vector<simgrid::mc::IgnoredHeapRegion> to_ignore;
- std::uint64_t hash;
- std::vector<s_mc_snapshot_ignored_data_t> ignored_data;
- std::vector<s_fd_infos_t> current_fds;
-};
-}
-}
-
-static XBT_ALWAYS_INLINE mc_mem_region_t mc_get_region_hinted(void* addr, simgrid::mc::Snapshot* snapshot,
- int process_index, mc_mem_region_t region)
-{
- if (region->contain(simgrid::mc::remote(addr)))
- return region;
- else
- return mc_get_snapshot_region(addr, snapshot, process_index);
-}
-
-static const void* mc_snapshot_get_heap_end(simgrid::mc::Snapshot* snapshot);
-
-namespace simgrid {
-namespace mc {
-
-XBT_PRIVATE std::shared_ptr<simgrid::mc::Snapshot> take_snapshot(int num_state);
-XBT_PRIVATE void restore_snapshot(std::shared_ptr<simgrid::mc::Snapshot> snapshot);
-}
-}
-
-XBT_PRIVATE void mc_restore_page_snapshot_region(simgrid::mc::RemoteClient* process, void* start_addr,
- simgrid::mc::ChunkedData const& pagenos);
-
-const void* MC_region_read_fragmented(mc_mem_region_t region, void* target, const void* addr, std::size_t size);
-
-int MC_snapshot_region_memcmp(const void* addr1, mc_mem_region_t region1, const void* addr2, mc_mem_region_t region2,
- std::size_t size);
-
-static XBT_ALWAYS_INLINE const void* mc_snapshot_get_heap_end(simgrid::mc::Snapshot* snapshot)
-{
- if (snapshot == nullptr)
- xbt_die("snapshot is nullptr");
- return mc_model_checker->process().get_heap()->breakval;
-}
-
-/** @brief Read memory from a snapshot region
- *
- * @param addr Process (non-snapshot) address of the data
- * @param region Snapshot memory region where the data is located
- * @param target Buffer to store the value
- * @param size Size of the data to read in bytes
- * @return Pointer where the data is located (target buffer of original location)
- */
-static XBT_ALWAYS_INLINE const void* MC_region_read(mc_mem_region_t region, void* target, const void* addr,
- std::size_t size)
-{
- xbt_assert(region);
-
- std::uintptr_t offset = (std::uintptr_t)addr - (std::uintptr_t)region->start().address();
-
- xbt_assert(region->contain(simgrid::mc::remote(addr)), "Trying to read out of the region boundary.");
-
- switch (region->storage_type()) {
- case simgrid::mc::StorageType::Flat:
- return (char*)region->flat_data().get() + offset;
-
- case simgrid::mc::StorageType::Chunked: {
- // Last byte of the region:
- void* end = (char*)addr + size - 1;
- if (simgrid::mc::mmu::sameChunk((std::uintptr_t)addr, (std::uintptr_t)end)) {
- // The memory is contained in a single page:
- return mc_translate_address_region_chunked((uintptr_t)addr, region);
- }
- // Otherwise, the memory spans several pages:
- return MC_region_read_fragmented(region, target, addr, size);
- }
-
- default:
- // includes StorageType::NoData and StorageType::Privatized (we currently do not pass the process_index to this
- // function so we assume that the privatized region has been resolved in the callers)
- xbt_die("Storage type not supported");
- }
-}
-
-static XBT_ALWAYS_INLINE void* MC_region_read_pointer(mc_mem_region_t region, const void* addr)
-{
- void* res;
- return *(void**)MC_region_read(region, &res, addr, sizeof(void*));
-}
-
-#endif
