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"
21 #include "simix/smx_private.h"
23 #include "mc_forward.h"
24 #include "mc_mmalloc.h" // std_heap
25 #include "mc_memory_map.h"
26 #include "mc_address_space.h"
27 #include "mc_protocol.h"
31 int MC_process_vm_open(pid_t pid, int flags);
34 MC_PROCESS_NO_FLAG = 0,
35 MC_PROCESS_SELF_FLAG = 1,
36 } e_mc_process_flags_t;
38 // Those flags are used to track down which cached information
39 // is still up to date and which information needs to be updated.
41 MC_PROCESS_CACHE_FLAG_HEAP = 1,
42 MC_PROCESS_CACHE_FLAG_MALLOC_INFO = 2,
43 MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES = 4,
44 } e_mc_process_cache_flags_t ;
46 typedef struct s_mc_smx_process_info s_mc_smx_process_info_t, *mc_smx_process_info_t;
48 /** Representation of a process
51 s_mc_address_space_t address_space;
52 e_mc_process_flags_t process_flags;
57 memory_map_t memory_map;
58 void *maestro_stack_start, *maestro_stack_end;
59 mc_object_info_t libsimgrid_info;
60 mc_object_info_t binary_info;
61 mc_object_info_t* object_infos;
62 size_t object_infos_size;
65 /** Copy of `simix_global->process_list`
69 xbt_dynar_t smx_process_infos;
71 /** Copy of `simix_global->process_to_destroy`
75 xbt_dynar_t smx_old_process_infos;
77 /** State of the cache (which variables are up to date) */
78 e_mc_process_cache_flags_t cache_flags;
80 /** Address of the heap structure in the MCed process. */
83 /** Copy of the heap structure of the process
85 * This is refreshed with the `MC_process_refresh` call.
86 * This is not used if the process is the current one:
87 * use `MC_process_get_heap_info` in order to use it.
91 /** Copy of the allocation info structure
93 * This is refreshed with the `MC_process_refresh` call.
94 * This is not used if the process is the current one:
95 * use `MC_process_get_malloc_info` in order to use it.
97 malloc_info* heap_info;
99 // ***** Libunwind-data
101 /** Full-featured MC-aware libunwind address space for the process
103 * This address space is using a mc_unw_context_t
104 * (with mc_process_t/mc_address_space_t and unw_context_t).
106 unw_addr_space_t unw_addr_space;
108 /** Underlying libunwind addres-space
110 * The `find_proc_info`, `put_unwind_info`, `get_dyn_info_list_addr`
111 * operations of the native MC address space is currently delegated
112 * to this address space (either the local or a ptrace unwinder).
114 unw_addr_space_t unw_underlying_addr_space;
116 /** The corresponding context
118 void* unw_underlying_context;
120 xbt_dynar_t checkpoint_ignore;
123 bool MC_is_process(mc_address_space_t p);
125 void MC_process_init(mc_process_t process, pid_t pid, int sockfd);
126 void MC_process_clear(mc_process_t process);
128 /** Refresh the information about the process
130 * Do not use direclty, this is used by the getters when appropriate
131 * in order to have fresh data.
133 void MC_process_refresh_heap(mc_process_t process);
135 /** Refresh the information about the process
137 * Do not use direclty, this is used by the getters when appropriate
138 * in order to have fresh data.
140 void MC_process_refresh_malloc_info(mc_process_t process);
143 bool MC_process_is_self(mc_process_t process)
145 return process->process_flags & MC_PROCESS_SELF_FLAG;
148 /* Process memory access: */
150 /** Read data from a process memory
152 * @param process the process
153 * @param local local memory address (destination)
154 * @param remote target process memory address (source)
155 * @param len data size
157 const void* MC_process_read(mc_process_t process,
158 e_adress_space_read_flags_t flags,
159 void* local, const void* remote, size_t len,
162 // Simplified versions/wrappers (whould be moved in mc_address_space):
163 const void* MC_process_read_simple(mc_process_t process,
164 void* local, const void* remote, size_t len);
165 const void* MC_process_read_dynar_element(mc_process_t process,
166 void* local, const void* remote_dynar, size_t i);
167 unsigned long MC_process_read_dynar_length(mc_process_t process, const void* remote_dynar);
169 /** Write data to a process memory
171 * @param process the process
172 * @param local local memory address (source)
173 * @param remote target process memory address (target)
174 * @param len data size
176 void MC_process_write(mc_process_t process, const void* local, void* remote, size_t len);
178 void MC_process_clear_memory(mc_process_t process, void* remote, size_t len);
180 /* Functions, variables of the process: */
182 mc_object_info_t MC_process_find_object_info(mc_process_t process, const void* addr);
183 mc_object_info_t MC_process_find_object_info_exec(mc_process_t process, const void* addr);
184 mc_object_info_t MC_process_find_object_info_rw(mc_process_t process, const void* addr);
186 dw_frame_t MC_process_find_function(mc_process_t process, const void* ip);
188 void MC_process_read_variable(mc_process_t process, const char* name, void* target, size_t size);
189 char* MC_process_read_string(mc_process_t, void* address);
191 static inline xbt_mheap_t MC_process_get_heap(mc_process_t process)
193 if (MC_process_is_self(process))
195 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_HEAP))
196 MC_process_refresh_heap(process);
197 return process->heap;
200 static inline malloc_info* MC_process_get_malloc_info(mc_process_t process)
202 if (MC_process_is_self(process))
203 return std_heap->heapinfo;
204 if (!(process->cache_flags & MC_PROCESS_CACHE_FLAG_MALLOC_INFO))
205 MC_process_refresh_malloc_info(process);
206 return process->heap_info;
209 /** Find (one occurence of) the named variable definition
211 dw_variable_t MC_process_find_variable_by_name(mc_process_t process, const char* name);