1 /* Copyright (c) 2008-2014. 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. */
10 #include <type_traits>
12 #include <sys/types.h>
16 #include "simgrid_config.h"
17 #include <sys/types.h>
19 #include <xbt/mmalloc.h>
22 #include "xbt/mmalloc/mmprivate.h"
25 #include <simgrid/simix.h>
26 #include "simix/popping_private.h"
27 #include "simix/smx_private.h"
29 #include "mc_forward.h"
31 #include "mc_mmalloc.h" // std_heap
32 #include "mc_memory_map.h"
33 #include "AddressSpace.hpp"
34 #include "mc_protocol.h"
36 typedef int mc_process_flags_t;
37 #define MC_PROCESS_NO_FLAG 0
38 #define MC_PROCESS_SELF_FLAG 1
40 // Those flags are used to track down which cached information
41 // is still up to date and which information needs to be updated.
42 typedef int mc_process_cache_flags_t;
43 #define MC_PROCESS_CACHE_FLAG_NONE 0
44 #define MC_PROCESS_CACHE_FLAG_HEAP 1
45 #define MC_PROCESS_CACHE_FLAG_MALLOC_INFO 2
46 #define MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES 4
48 typedef struct s_mc_smx_process_info s_mc_smx_process_info_t, *mc_smx_process_info_t;
53 struct IgnoredRegion {
58 /** Representation of a process
60 class Process : public AddressSpace {
62 Process(pid_t pid, int sockfd);
67 return this->process_flags & MC_PROCESS_SELF_FLAG;
71 const void* read_bytes(void* buffer, std::size_t size,
72 remote_ptr<void> address, int process_index = ProcessIndexAny,
73 ReadMode mode = Normal) const MC_OVERRIDE;
74 void read_variable(const char* name, void* target, size_t size) const;
76 T read_variable(const char *name) const
78 static_assert(std::is_trivial<T>::value, "Cannot read a non-trivial type");
80 read_variable(name, &res, sizeof(T));
83 char* read_string(remote_ptr<void> address) const;
86 void write_bytes(const void* buffer, size_t len, remote_ptr<void> address);
87 void clear_bytes(remote_ptr<void> address, size_t len);
90 mc_object_info_t find_object_info(remote_ptr<void> addr) const;
91 mc_object_info_t find_object_info_exec(remote_ptr<void> addr) const;
92 mc_object_info_t find_object_info_rw(remote_ptr<void> addr) const;
93 dw_frame_t find_function(remote_ptr<void> ip) const;
94 dw_variable_t find_variable(const char* name) const;
97 xbt_mheap_t get_heap()
99 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
100 this->refresh_heap();
103 malloc_info* get_malloc_info()
105 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
106 this->refresh_malloc_info();
107 return this->heap_info;
110 std::vector<IgnoredRegion> const& ignored_regions() const
112 return ignored_regions_;
114 void ignore_region(std::uint64_t address, std::size_t size);
116 pid_t pid() const { return pid_; }
118 bool in_maestro_stack(remote_ptr<void> p) const
120 return p >= this->maestro_stack_start_ && p < this->maestro_stack_end_;
128 void terminate(int status)
140 typename std::enable_if< std::is_class<M>::value && std::is_trivial<M>::value, int >::type
141 send_message(M const& m)
143 return MC_protocol_send(this->socket_, &m, sizeof(M));
146 int send_message(e_mc_message_type message_id)
148 return MC_protocol_send_simple_message(this->socket_, message_id);
152 typename std::enable_if< std::is_class<M>::value && std::is_trivial<M>::value, ssize_t >::type
153 receive_message(M& m)
155 return MC_receive_message(this->socket_, &m, sizeof(M), 0);
159 void init_memory_map_info();
161 void refresh_malloc_info();
163 mc_process_flags_t process_flags;
168 std::vector<VmMap> memory_map_;
169 remote_ptr<void> maestro_stack_start_, maestro_stack_end_;
171 std::vector<IgnoredRegion> ignored_regions_;
173 public: // object info
174 // TODO, make private (first, objectify mc_object_info_t)
175 mc_object_info_t libsimgrid_info;
176 mc_object_info_t binary_info;
177 mc_object_info_t* object_infos;
178 size_t object_infos_size;
180 public: // Copies of MCed SMX data structures
181 /** Copy of `simix_global->process_list`
185 xbt_dynar_t smx_process_infos;
187 /** Copy of `simix_global->process_to_destroy`
191 xbt_dynar_t smx_old_process_infos;
193 /** State of the cache (which variables are up to date) */
194 mc_process_cache_flags_t cache_flags;
196 /** Address of the heap structure in the MCed process. */
199 /** Copy of the heap structure of the process
201 * This is refreshed with the `MC_process_refresh` call.
202 * This is not used if the process is the current one:
203 * use `get_heap_info()` in order to use it.
207 /** Copy of the allocation info structure
209 * This is refreshed with the `MC_process_refresh` call.
210 * This is not used if the process is the current one:
211 * use `get_malloc_info()` in order to use it.
213 malloc_info* heap_info;
215 public: // Libunwind-data
217 /** Full-featured MC-aware libunwind address space for the process
219 * This address space is using a mc_unw_context_t
220 * (with mc_process_t/mc_address_space_t and unw_context_t).
222 unw_addr_space_t unw_addr_space;
224 /** Underlying libunwind addres-space
226 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
227 * operations of the native MC address space is currently delegated
228 * to this address space (either the local or a ptrace unwinder).
230 unw_addr_space_t unw_underlying_addr_space;
232 /** The corresponding context
234 void* unw_underlying_context;
237 /** Open a FD to a remote process memory (`/dev/$pid/mem`)
239 int open_vm(pid_t pid, int flags);
246 XBT_INTERNAL void MC_invalidate_cache(void);