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>
13 #include "simgrid_config.h"
15 #include <sys/types.h>
17 #include <xbt/mmalloc.h>
20 #include "xbt/mmalloc/mmprivate.h"
23 #include "simix/popping_private.h"
24 #include "simix/smx_private.h"
26 #include "mc_forward.h"
27 #include "mc_mmalloc.h" // std_heap
28 #include "mc_memory_map.h"
29 #include "mc_address_space.h"
30 #include "mc_protocol.h"
34 int MC_process_vm_open(pid_t pid, int flags);
37 MC_PROCESS_NO_FLAG = 0,
38 MC_PROCESS_SELF_FLAG = 1,
39 } e_mc_process_flags_t;
41 // Those flags are used to track down which cached information
42 // is still up to date and which information needs to be updated.
44 MC_PROCESS_CACHE_FLAG_HEAP = 1,
45 MC_PROCESS_CACHE_FLAG_MALLOC_INFO = 2,
46 MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES = 4,
47 } e_mc_process_cache_flags_t ;
49 typedef struct s_mc_smx_process_info s_mc_smx_process_info_t, *mc_smx_process_info_t;
51 /** Representation of a process
54 s_mc_address_space_t address_space;
55 e_mc_process_flags_t process_flags;
60 memory_map_t memory_map;
61 void *maestro_stack_start, *maestro_stack_end;
62 mc_object_info_t libsimgrid_info;
63 mc_object_info_t binary_info;
64 mc_object_info_t* object_infos;
65 size_t object_infos_size;
68 /** Copy of `simix_global->process_list`
72 xbt_dynar_t smx_process_infos;
74 /** Copy of `simix_global->process_to_destroy`
78 xbt_dynar_t smx_old_process_infos;
80 /** State of the cache (which variables are up to date) */
81 e_mc_process_cache_flags_t cache_flags;
83 /** Address of the heap structure in the MCed process. */
86 /** Copy of the heap structure of the process
88 * This is refreshed with the `MC_process_refresh` call.
89 * This is not used if the process is the current one:
90 * use `MC_process_get_heap_info` in order to use it.
94 /** Copy of the allocation info structure
96 * This is refreshed with the `MC_process_refresh` call.
97 * This is not used if the process is the current one:
98 * use `MC_process_get_malloc_info` in order to use it.
100 malloc_info* heap_info;
102 // ***** Libunwind-data
104 /** Full-featured MC-aware libunwind address space for the process
106 * This address space is using a mc_unw_context_t
107 * (with mc_process_t/mc_address_space_t and unw_context_t).
109 unw_addr_space_t unw_addr_space;
111 /** Underlying libunwind addres-space
113 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
114 * operations of the native MC address space is currently delegated
115 * to this address space (either the local or a ptrace unwinder).
117 unw_addr_space_t unw_underlying_addr_space;
119 /** The corresponding context
121 void* unw_underlying_context;
123 xbt_dynar_t checkpoint_ignore;
126 bool MC_is_process(mc_address_space_t p);
128 void MC_process_init(mc_process_t process, pid_t pid, int sockfd);
129 void MC_process_clear(mc_process_t process);
131 /** Refresh the information about the process
133 * Do not use direclty, this is used by the getters when appropriate
134 * in order to have fresh data.
136 void MC_process_refresh_heap(mc_process_t process);
138 /** Refresh the information about the process
140 * Do not use direclty, this is used by the getters when appropriate
141 * in order to have fresh data.
143 void MC_process_refresh_malloc_info(mc_process_t process);
146 bool MC_process_is_self(mc_process_t process)
148 return process->process_flags & MC_PROCESS_SELF_FLAG;
151 /* Process memory access: */
153 /** Read data from a process memory
155 * @param process the process
156 * @param local local memory address (destination)
157 * @param remote target process memory address (source)
158 * @param len data size
160 const void* MC_process_read(mc_process_t process,
161 e_adress_space_read_flags_t flags,
162 void* local, const void* remote, size_t len,
165 // Simplified versions/wrappers (whould be moved in mc_address_space):
166 const void* MC_process_read_simple(mc_process_t process,
167 void* local, const void* remote, size_t len);
168 const void* MC_process_read_dynar_element(mc_process_t process,
169 void* local, const void* remote_dynar, size_t i, size_t len);
170 unsigned long MC_process_read_dynar_length(mc_process_t process, const void* remote_dynar);
172 /** Write data to a process memory
174 * @param process the process
175 * @param local local memory address (source)
176 * @param remote target process memory address (target)
177 * @param len data size
179 void MC_process_write(mc_process_t process, const void* local, void* remote, size_t len);
181 void MC_process_clear_memory(mc_process_t process, void* remote, size_t len);
183 /* Functions, variables of the process: */
185 mc_object_info_t MC_process_find_object_info(mc_process_t process, const void* addr);
186 mc_object_info_t MC_process_find_object_info_exec(mc_process_t process, const void* addr);
187 mc_object_info_t MC_process_find_object_info_rw(mc_process_t process, const void* addr);
189 dw_frame_t MC_process_find_function(mc_process_t process, const void* ip);
191 void MC_process_read_variable(mc_process_t process, const char* name, void* target, size_t size);
192 char* MC_process_read_string(mc_process_t, void* address);
194 static inline xbt_mheap_t MC_process_get_heap(mc_process_t process)
196 if (MC_process_is_self(process))
198 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
199 MC_process_refresh_heap(process);
200 return process->heap;
203 static inline malloc_info* MC_process_get_malloc_info(mc_process_t process)
205 if (MC_process_is_self(process))
206 return std_heap->heapinfo;
207 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
208 MC_process_refresh_malloc_info(process);
209 return process->heap_info;
212 /** Find (one occurence of) the named variable definition
214 dw_variable_t MC_process_find_variable_by_name(mc_process_t process, const char* name);