+++ /dev/null
-/* mc::RemoteClient: representative of the Client memory on the MC side */
-
-/* Copyright (c) 2008-2020. 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. */
-
-#ifndef SIMGRID_MC_PROCESS_H
-#define SIMGRID_MC_PROCESS_H
-
-#include "src/mc/AddressSpace.hpp"
-#include "src/mc/inspect/ObjectInformation.hpp"
-#include "src/mc/remote/Channel.hpp"
-#include "src/mc/remote/RemotePtr.hpp"
-#include "src/xbt/mmalloc/mmprivate.h"
-
-#include <vector>
-
-namespace simgrid {
-namespace mc {
-
-class ActorInformation {
-public:
- /** MCed address of the process */
- RemotePtr<kernel::actor::ActorImpl> address{nullptr};
- Remote<kernel::actor::ActorImpl> copy;
-
- /** Hostname (owned by `mc_modelchecker->hostnames`) */
- const char* hostname = nullptr;
- std::string name;
-
- void clear()
- {
- name.clear();
- address = nullptr;
- hostname = nullptr;
- }
-};
-
-struct IgnoredRegion {
- std::uint64_t addr;
- std::size_t size;
-};
-
-struct IgnoredHeapRegion {
- int block;
- int fragment;
- void* address;
- std::size_t size;
-};
-
-/** The Model-Checked process, seen from the MCer perspective
- *
- * This class is mixing a lot of different responsibilities and is tied
- * to SIMIX. It should probably be split into different classes.
- *
- * Responsibilities:
- *
- * - reading from the process memory (`AddressSpace`);
- * - accessing the system state of the process (heap, …);
- * - storing the SIMIX state of the process;
- * - privatization;
- * - communication with the model-checked process;
- * - stack unwinding;
- * - etc.
- */
-class RemoteClient final : public AddressSpace {
-private:
- // Those flags are used to track down which cached information
- // is still up to date and which information needs to be updated.
- static constexpr int cache_none = 0;
- static constexpr int cache_heap = 1;
- static constexpr int cache_malloc = 2;
- static constexpr int cache_simix_processes = 4;
-
-public:
- RemoteClient(pid_t pid, int sockfd);
- ~RemoteClient();
- void init();
-
- RemoteClient(RemoteClient const&) = delete;
- RemoteClient(RemoteClient&&) = delete;
- RemoteClient& operator=(RemoteClient const&) = delete;
- RemoteClient& operator=(RemoteClient&&) = delete;
-
- // Read memory:
- void* read_bytes(void* buffer, std::size_t size, RemotePtr<void> address,
- ReadOptions options = ReadOptions::none()) const override;
-
- void read_variable(const char* name, void* target, size_t size) const;
- template <class T> void read_variable(const char* name, T* target) const
- {
- read_variable(name, target, sizeof(*target));
- }
- template <class T> Remote<T> read_variable(const char* name) const
- {
- Remote<T> res;
- read_variable(name, res.get_buffer(), sizeof(T));
- return res;
- }
-
- std::string read_string(RemotePtr<char> address) const;
- using AddressSpace::read_string;
-
- // Write memory:
- void write_bytes(const void* buffer, size_t len, RemotePtr<void> address);
- void clear_bytes(RemotePtr<void> address, size_t len);
-
- // Debug information:
- std::shared_ptr<ObjectInformation> find_object_info(RemotePtr<void> addr) const;
- std::shared_ptr<ObjectInformation> find_object_info_exec(RemotePtr<void> addr) const;
- std::shared_ptr<ObjectInformation> find_object_info_rw(RemotePtr<void> addr) const;
- Frame* find_function(RemotePtr<void> ip) const;
- const Variable* find_variable(const char* name) const;
-
- // Heap access:
- xbt_mheap_t get_heap()
- {
- if (not(this->cache_flags_ & RemoteClient::cache_heap))
- this->refresh_heap();
- return this->heap.get();
- }
- const malloc_info* get_malloc_info()
- {
- if (not(this->cache_flags_ & RemoteClient::cache_malloc))
- this->refresh_malloc_info();
- return this->heap_info.data();
- }
-
- void clear_cache() { this->cache_flags_ = RemoteClient::cache_none; }
-
- Channel const& get_channel() const { return channel_; }
- Channel& get_channel() { return channel_; }
-
- std::vector<IgnoredRegion> const& ignored_regions() const { return ignored_regions_; }
- void ignore_region(std::uint64_t address, std::size_t size);
-
- pid_t pid() const { return pid_; }
-
- bool in_maestro_stack(RemotePtr<void> p) const
- {
- return p >= this->maestro_stack_start_ && p < this->maestro_stack_end_;
- }
-
- bool running() const { return running_; }
-
- void terminate() { running_ = false; }
-
- void ignore_global_variable(const char* name)
- {
- for (std::shared_ptr<ObjectInformation> const& info : this->object_infos)
- info->remove_global_variable(name);
- }
-
- std::vector<s_stack_region_t>& stack_areas() { return stack_areas_; }
- std::vector<s_stack_region_t> const& stack_areas() const { return stack_areas_; }
-
- std::vector<IgnoredHeapRegion> const& ignored_heap() const { return ignored_heap_; }
- void ignore_heap(IgnoredHeapRegion const& region);
- void unignore_heap(void* address, size_t size);
-
- void ignore_local_variable(const char* var_name, const char* frame_name);
- std::vector<ActorInformation>& actors();
- std::vector<ActorInformation>& dead_actors();
-
- /** Get a local description of a remote SIMIX actor */
- ActorInformation* resolve_actor_info(RemotePtr<kernel::actor::ActorImpl> actor)
- {
- xbt_assert(mc_model_checker != nullptr);
- if (not actor)
- return nullptr;
- this->refresh_simix();
- for (auto& actor_info : this->smx_actors_infos)
- if (actor_info.address == actor)
- return &actor_info;
- for (auto& actor_info : this->smx_dead_actors_infos)
- if (actor_info.address == actor)
- return &actor_info;
- return nullptr;
- }
-
- /** Get a local copy of the SIMIX actor structure */
- kernel::actor::ActorImpl* resolve_actor(RemotePtr<kernel::actor::ActorImpl> process)
- {
- ActorInformation* actor_info = this->resolve_actor_info(process);
- if (actor_info)
- return actor_info->copy.get_buffer();
- else
- return nullptr;
- }
-
- void dump_stack();
-
-private:
- void init_memory_map_info();
- void refresh_heap();
- void refresh_malloc_info();
- void refresh_simix();
-
- pid_t pid_ = -1;
- Channel channel_;
- bool running_ = false;
- std::vector<xbt::VmMap> memory_map_;
- RemotePtr<void> maestro_stack_start_;
- RemotePtr<void> maestro_stack_end_;
- int memory_file = -1;
- std::vector<IgnoredRegion> ignored_regions_;
- std::vector<s_stack_region_t> stack_areas_;
- std::vector<IgnoredHeapRegion> ignored_heap_;
-
-public:
- // object info
- // TODO, make private (first, objectify simgrid::mc::ObjectInformation*)
- std::vector<std::shared_ptr<ObjectInformation>> object_infos;
- std::shared_ptr<ObjectInformation> libsimgrid_info;
- std::shared_ptr<ObjectInformation> binary_info;
-
- // Copies of MCed SMX data structures
- /** Copy of `simix_global->process_list`
- *
- * See mc_smx.c.
- */
- std::vector<ActorInformation> smx_actors_infos;
-
- /** Copy of `simix_global->actors_to_destroy`
- *
- * See mc_smx.c.
- */
- std::vector<ActorInformation> smx_dead_actors_infos;
-
-private:
- /** State of the cache (which variables are up to date) */
- int cache_flags_ = RemoteClient::cache_none;
-
-public:
- /** Address of the heap structure in the MCed process. */
- void* heap_address;
-
- /** Copy of the heap structure of the process
- *
- * This is refreshed with the `MC_process_refresh` call.
- * This is not used if the process is the current one:
- * use `get_heap_info()` in order to use it.
- */
- std::unique_ptr<s_xbt_mheap_t> heap;
-
- /** Copy of the allocation info structure
- *
- * This is refreshed with the `MC_process_refresh` call.
- * This is not used if the process is the current one:
- * use `get_malloc_info()` in order to use it.
- */
- std::vector<malloc_info> heap_info;
-
- // Libunwind-data
- /** Full-featured MC-aware libunwind address space for the process
- *
- * This address space is using a simgrid::mc::UnwindContext*
- * (with simgrid::mc::Process* / simgrid::mc::AddressSpace*
- * and unw_context_t).
- */
- unw_addr_space_t unw_addr_space;
-
- /** Underlying libunwind address-space
- *
- * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
- * operations of the native MC address space is currently delegated
- * to this address space (either the local or a ptrace unwinder).
- */
- unw_addr_space_t unw_underlying_addr_space;
-
- /** The corresponding context
- */
- void* unw_underlying_context;
-};
-
-/** Open a FD to a remote process memory (`/dev/$pid/mem`)
- */
-XBT_PRIVATE int open_vm(pid_t pid, int flags);
-} // namespace mc
-} // namespace simgrid
-
-#endif
