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>
18 #include "xbt/mmalloc/mmprivate.h"
20 #include "simix/popping_private.h"
22 #include "mc_forward.h"
23 #include "mc_mmalloc.h" // std_heap
24 #include "mc_memory_map.h"
25 #include "mc_address_space.h"
29 int MC_process_vm_open(pid_t pid, int flags);
32 MC_PROCESS_NO_FLAG = 0,
33 MC_PROCESS_SELF_FLAG = 1,
34 } e_mc_process_flags_t;
36 // Those flags are used to track down which cached information
37 // is still up to date and which information needs to be updated.
39 MC_PROCESS_CACHE_FLAG_HEAP = 1,
40 MC_PROCESS_CACHE_FLAG_MALLOC_INFO = 2,
41 } e_mc_process_cache_flags_t ;
43 /** Representation of a process
46 s_mc_address_space_t address_space;
47 e_mc_process_flags_t process_flags;
52 memory_map_t memory_map;
53 void *maestro_stack_start, *maestro_stack_end;
54 mc_object_info_t libsimgrid_info;
55 mc_object_info_t binary_info;
56 mc_object_info_t* object_infos;
57 size_t object_infos_size;
60 // Cache: don't use those fields directly but with the getters
61 // which ensure that proper synchronisation has been done.
63 e_mc_process_cache_flags_t cache_flags;
65 /** Address of the heap structure in the target process.
69 /** Copy of the heap structure of the process
71 * This is refreshed with the `MC_process_refresh` call.
72 * This is not used if the process is the current one:
73 * use `MC_process_get_heap_info` in order to use it.
77 /** Copy of the allocation info structure
79 * This is refreshed with the `MC_process_refresh` call.
80 * This is not used if the process is the current one:
81 * use `MC_process_get_malloc_info` in order to use it.
83 malloc_info* heap_info;
85 // ***** Libunwind-data
87 /** Full-featured MC-aware libunwind address space for the process
89 * This address space is using a mc_unw_context_t
90 * (with mc_process_t/mc_address_space_t and unw_context_t).
92 unw_addr_space_t unw_addr_space;
94 /** Underlying libunwind addres-space
96 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
97 * operations of the native MC address space is currently delegated
98 * to this address space (either the local or a ptrace unwinder).
100 unw_addr_space_t unw_underlying_addr_space;
102 /** The corresponding context
104 void* unw_underlying_context;
106 xbt_dynar_t checkpoint_ignore;
109 bool MC_is_process(mc_address_space_t p);
111 void MC_process_init(mc_process_t process, pid_t pid, int sockfd);
112 void MC_process_clear(mc_process_t process);
114 /** Refresh the information about the process
116 * Do not use direclty, this is used by the getters when appropriate
117 * in order to have fresh data.
119 void MC_process_refresh_heap(mc_process_t process);
121 /** Refresh the information about the process
123 * Do not use direclty, this is used by the getters when appropriate
124 * in order to have fresh data.
126 void MC_process_refresh_malloc_info(mc_process_t process);
129 bool MC_process_is_self(mc_process_t process)
131 return process->process_flags & MC_PROCESS_SELF_FLAG;
134 /* Process memory access: */
136 /** Read data from a process memory
138 * @param process the process
139 * @param local local memory address (destination)
140 * @param remote target process memory address (source)
141 * @param len data size
143 const void* MC_process_read(mc_process_t process,
144 e_adress_space_read_flags_t flags,
145 void* local, const void* remote, size_t len,
148 /** Write data to a process memory
150 * @param process the process
151 * @param local local memory address (source)
152 * @param remote target process memory address (target)
153 * @param len data size
155 void MC_process_write(mc_process_t process, const void* local, void* remote, size_t len);
157 void MC_process_clear_memory(mc_process_t process, void* remote, size_t len);
159 /* Functions, variables of the process: */
161 mc_object_info_t MC_process_find_object_info(mc_process_t process, const void* addr);
162 mc_object_info_t MC_process_find_object_info_exec(mc_process_t process, const void* addr);
163 mc_object_info_t MC_process_find_object_info_rw(mc_process_t process, const void* addr);
165 dw_frame_t MC_process_find_function(mc_process_t process, const void* ip);
167 static inline xbt_mheap_t MC_process_get_heap(mc_process_t process)
169 if (MC_process_is_self(process))
171 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
172 MC_process_refresh_heap(process);
173 return process->heap;
176 static inline malloc_info* MC_process_get_malloc_info(mc_process_t process)
178 if (MC_process_is_self(process))
179 return std_heap->heapinfo;
180 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
181 MC_process_refresh_malloc_info(process);
182 return process->heap_info;
185 /** Find (one occurence of) the named variable definition
187 dw_variable_t MC_process_find_variable_by_name(mc_process_t process, const char* name);