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. */
11 #include <sys/types.h>
15 #include "simgrid_config.h"
16 #include <sys/types.h>
18 #include <xbt/mmalloc.h>
21 #include "xbt/mmalloc/mmprivate.h"
24 #include <simgrid/simix.h>
25 #include "simix/popping_private.h"
26 #include "simix/smx_private.h"
28 #include "mc_forward.h"
30 #include "mc_mmalloc.h" // std_heap
31 #include "mc_memory_map.h"
32 #include "AddressSpace.hpp"
33 #include "mc_protocol.h"
35 typedef int mc_process_flags_t;
36 #define MC_PROCESS_NO_FLAG 0
37 #define MC_PROCESS_SELF_FLAG 1
39 // Those flags are used to track down which cached information
40 // is still up to date and which information needs to be updated.
41 typedef int mc_process_cache_flags_t;
42 #define MC_PROCESS_CACHE_FLAG_NONE 0
43 #define MC_PROCESS_CACHE_FLAG_HEAP 1
44 #define MC_PROCESS_CACHE_FLAG_MALLOC_INFO 2
45 #define MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES 4
47 typedef struct s_mc_smx_process_info s_mc_smx_process_info_t, *mc_smx_process_info_t;
52 struct IgnoredRegion {
57 /** Representation of a process
59 class Process : public AddressSpace {
61 Process(pid_t pid, int sockfd);
66 return this->process_flags & MC_PROCESS_SELF_FLAG;
70 const void* read_bytes(void* buffer, std::size_t size,
71 remote_ptr<void> address, int process_index = ProcessIndexAny,
72 ReadMode mode = Normal) const MC_OVERRIDE;
73 void read_variable(const char* name, void* target, size_t size) const;
75 T read_variable(const char *name) const
77 static_assert(std::is_trivial<T>::value, "Cannot read a non-trivial type");
79 read_variable(name, &res, sizeof(T));
82 char* read_string(remote_ptr<void> address) const;
85 void write_bytes(const void* buffer, size_t len, remote_ptr<void> address);
86 void clear_bytes(remote_ptr<void> address, size_t len);
89 mc_object_info_t find_object_info(remote_ptr<void> addr) const;
90 mc_object_info_t find_object_info_exec(remote_ptr<void> addr) const;
91 mc_object_info_t find_object_info_rw(remote_ptr<void> addr) const;
92 dw_frame_t find_function(remote_ptr<void> ip) const;
93 dw_variable_t find_variable(const char* name) const;
96 xbt_mheap_t get_heap()
98 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
102 malloc_info* get_malloc_info()
104 if (!(this->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
105 this->refresh_malloc_info();
106 return this->heap_info;
109 std::vector<IgnoredRegion> const& ignored_regions() const
111 return ignored_regions_;
113 void ignore_region(std::uint64_t address, std::size_t size);
115 pid_t pid() const { return pid_; }
118 void init_memory_map_info();
120 void refresh_malloc_info();
122 mc_process_flags_t process_flags;
124 public: // to be private
128 memory_map_t memory_map;
129 void *maestro_stack_start, *maestro_stack_end;
130 mc_object_info_t libsimgrid_info;
131 mc_object_info_t binary_info;
132 mc_object_info_t* object_infos;
133 size_t object_infos_size;
136 /** Copy of `simix_global->process_list`
140 xbt_dynar_t smx_process_infos;
142 /** Copy of `simix_global->process_to_destroy`
146 xbt_dynar_t smx_old_process_infos;
148 /** State of the cache (which variables are up to date) */
149 mc_process_cache_flags_t cache_flags;
151 /** Address of the heap structure in the MCed process. */
154 /** Copy of the heap structure of the process
156 * This is refreshed with the `MC_process_refresh` call.
157 * This is not used if the process is the current one:
158 * use `get_heap_info()` in order to use it.
162 /** Copy of the allocation info structure
164 * This is refreshed with the `MC_process_refresh` call.
165 * This is not used if the process is the current one:
166 * use `get_malloc_info()` in order to use it.
168 malloc_info* heap_info;
170 // ***** Libunwind-data
172 /** Full-featured MC-aware libunwind address space for the process
174 * This address space is using a mc_unw_context_t
175 * (with mc_process_t/mc_address_space_t and unw_context_t).
177 unw_addr_space_t unw_addr_space;
179 /** Underlying libunwind addres-space
181 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
182 * operations of the native MC address space is currently delegated
183 * to this address space (either the local or a ptrace unwinder).
185 unw_addr_space_t unw_underlying_addr_space;
187 /** The corresponding context
189 void* unw_underlying_context;
192 std::vector<IgnoredRegion> ignored_regions_;
195 /** Open a FD to a remote process memory (`/dev/$pid/mem`)
197 int open_vm(pid_t pid, int flags);
204 XBT_INTERNAL void MC_invalidate_cache(void);