1 /* Copyright (c) 2008-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #ifndef SIMGRID_MC_PROCESS_H
8 #define SIMGRID_MC_PROCESS_H
13 #include <type_traits>
17 #include <sys/types.h>
19 #include <simgrid_config.h>
22 #include <xbt/dynar.h>
23 #include <xbt/mmalloc.h>
26 #include "src/xbt/mmalloc/mmprivate.h"
29 #include <simgrid/simix.h>
30 #include "src/simix/popping_private.h"
31 #include "src/simix/smx_private.h"
33 #include "src/xbt/memory_map.hpp"
35 #include "src/mc/mc_forward.hpp"
36 #include "src/mc/mc_base.h"
37 #include "src/mc/AddressSpace.hpp"
38 #include "src/mc/mc_protocol.h"
39 #include "src/mc/ObjectInformation.hpp"
41 // Those flags are used to track down which cached information
42 // is still up to date and which information needs to be updated.
43 typedef int mc_process_cache_flags_t;
44 #define MC_PROCESS_CACHE_FLAG_NONE 0
45 #define MC_PROCESS_CACHE_FLAG_HEAP 1
46 #define MC_PROCESS_CACHE_FLAG_MALLOC_INFO 2
47 #define MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES 4
52 class SimixProcessInformation {
54 /** MCed address of the process */
55 void* address = nullptr;
57 /** (Flat) Copy of the process data structure */
58 struct s_smx_process copy;
60 /** Hostname (owned by `mc_modelchecker->hostnames`) */
61 const char* hostname = nullptr;
72 struct IgnoredRegion {
77 struct IgnoredHeapRegion {
84 /** Representation of a process
86 * This class is mixing a lot of differents responsabilities and is tied
87 * to SIMIX. It should probably split into different classes.
91 * - reading from the process memory (`AddressSpace`);
92 * - accessing the system state of the porcess (heap, …);
93 * - storing the SIMIX state of the process;
95 * - communication with the model-checked process;
99 class Process final : public AddressSpace {
101 Process(pid_t pid, int sockfd);
105 Process(Process const&) = delete;
106 Process(Process &&) = delete;
107 Process& operator=(Process const&) = delete;
108 Process& operator=(Process &&) = delete;
111 const void* read_bytes(void* buffer, std::size_t size,
112 RemotePtr<void> address, int process_index = ProcessIndexAny,
113 ReadOptions options = ReadOptions::none()) const override;
114 void read_variable(const char* name, void* target, size_t size) const;
116 T read_variable(const char *name) const
118 static_assert(std::is_trivial<T>::value, "Cannot read a non-trivial type");
120 read_variable(name, &res, sizeof(T));
123 char* read_string(RemotePtr<void> address) const;
126 void write_bytes(const void* buffer, size_t len, RemotePtr<void> address);
127 void clear_bytes(RemotePtr<void> address, size_t len);
129 // Debug information:
130 std::shared_ptr<simgrid::mc::ObjectInformation> find_object_info(RemotePtr<void> addr) const;
131 std::shared_ptr<simgrid::mc::ObjectInformation> find_object_info_exec(RemotePtr<void> addr) const;
132 std::shared_ptr<simgrid::mc::ObjectInformation> find_object_info_rw(RemotePtr<void> addr) const;
133 simgrid::mc::Frame* find_function(RemotePtr<void> ip) const;
134 simgrid::mc::Variable* find_variable(const char* name) const;
137 xbt_mheap_t get_heap()
139 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
140 this->refresh_heap();
141 return this->heap.get();
143 malloc_info* get_malloc_info()
145 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
146 this->refresh_malloc_info();
147 return this->heap_info.data();
150 std::vector<IgnoredRegion> const& ignored_regions() const
152 return ignored_regions_;
154 void ignore_region(std::uint64_t address, std::size_t size);
156 pid_t pid() const { return pid_; }
158 bool in_maestro_stack(RemotePtr<void> p) const
160 return p >= this->maestro_stack_start_ && p < this->maestro_stack_end_;
174 typename std::enable_if< std::is_class<M>::value && std::is_trivial<M>::value, int >::type
175 send_message(M const& m)
177 return MC_protocol_send(this->socket_, &m, sizeof(M));
180 int send_message(e_mc_message_type message_id)
182 return MC_protocol_send_simple_message(this->socket_, message_id);
186 typename std::enable_if< std::is_class<M>::value && std::is_trivial<M>::value, ssize_t >::type
187 receive_message(M& m)
189 return MC_receive_message(this->socket_, &m, sizeof(M), 0);
192 void reset_soft_dirty();
193 void read_pagemap(uint64_t* pagemap, size_t start_page, size_t page_count);
195 bool privatized(ObjectInformation const& info) const
197 return privatized_ && info.executable();
199 bool privatized() const
203 void privatized(bool privatized) { privatized_ = privatized; }
205 void ignore_global_variable(const char* name)
207 for (std::shared_ptr<simgrid::mc::ObjectInformation> const& info :
209 info->remove_global_variable(name);
212 std::vector<s_stack_region_t>& stack_areas()
216 std::vector<s_stack_region_t> const& stack_areas() const
221 std::vector<IgnoredHeapRegion> const& ignored_heap() const
223 return ignored_heap_;
225 void ignore_heap(IgnoredHeapRegion const& region);
226 void unignore_heap(void *address, size_t size);
228 void ignore_local_variable(const char *var_name, const char *frame_name);
229 int socket() { return socket_; }
230 std::vector<simgrid::mc::SimixProcessInformation>& simix_processes();
231 std::vector<simgrid::mc::SimixProcessInformation>& old_simix_processes();
234 void init_memory_map_info();
236 void refresh_malloc_info();
237 void refresh_simix();
242 bool running_ = false;
243 std::vector<simgrid::xbt::VmMap> memory_map_;
244 RemotePtr<void> maestro_stack_start_, maestro_stack_end_;
245 int memory_file = -1;
246 std::vector<IgnoredRegion> ignored_regions_;
247 int clear_refs_fd_ = -1;
248 int pagemap_fd_ = -1;
249 bool privatized_ = false;
250 std::vector<s_stack_region_t> stack_areas_;
251 std::vector<IgnoredHeapRegion> ignored_heap_;
253 public: // object info
254 // TODO, make private (first, objectify simgrid::mc::ObjectInformation*)
255 std::vector<std::shared_ptr<simgrid::mc::ObjectInformation>> object_infos;
256 std::shared_ptr<simgrid::mc::ObjectInformation> libsimgrid_info;
257 std::shared_ptr<simgrid::mc::ObjectInformation> binary_info;
259 public: // Copies of MCed SMX data structures
260 /** Copy of `simix_global->process_list`
264 std::vector<SimixProcessInformation> smx_process_infos;
266 /** Copy of `simix_global->process_to_destroy`
270 std::vector<SimixProcessInformation> smx_old_process_infos;
272 /** State of the cache (which variables are up to date) */
273 mc_process_cache_flags_t cache_flags = MC_PROCESS_CACHE_FLAG_NONE;
275 /** Address of the heap structure in the MCed process. */
278 /** Copy of the heap structure of the process
280 * This is refreshed with the `MC_process_refresh` call.
281 * This is not used if the process is the current one:
282 * use `get_heap_info()` in order to use it.
284 std::unique_ptr<s_xbt_mheap_t> heap;
286 /** Copy of the allocation info structure
288 * This is refreshed with the `MC_process_refresh` call.
289 * This is not used if the process is the current one:
290 * use `get_malloc_info()` in order to use it.
292 std::vector<malloc_info> heap_info;
294 public: // Libunwind-data
296 /** Full-featured MC-aware libunwind address space for the process
298 * This address space is using a mc_unw_context_t
299 * (with simgrid::mc::Process* / simgrid::mc::AddressSpace*
300 * and unw_context_t).
302 unw_addr_space_t unw_addr_space;
304 /** Underlying libunwind addres-space
306 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
307 * operations of the native MC address space is currently delegated
308 * to this address space (either the local or a ptrace unwinder).
310 unw_addr_space_t unw_underlying_addr_space;
312 /** The corresponding context
314 void* unw_underlying_context;
317 /** Open a FD to a remote process memory (`/dev/$pid/mem`)
319 XBT_PRIVATE int open_vm(pid_t pid, int flags);