1 /* Copyright (c) 2015. 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 "simix/smx_private.h"
14 #include "ModelChecker.hpp"
16 using simgrid::mc::remote;
21 void MC_smx_process_info_clear(mc_smx_process_info_t p)
28 xbt_dynar_t MC_smx_process_info_list_new(void)
31 sizeof(s_mc_smx_process_info_t),
32 ( void_f_pvoid_t) &MC_smx_process_info_clear);
36 bool is_in_dynar(smx_process_t p, xbt_dynar_t dynar)
38 return (uintptr_t) p >= (uintptr_t) dynar->data
39 && (uintptr_t) p < ((uintptr_t) dynar->data + dynar->used * dynar->elmsize);
43 mc_smx_process_info_t MC_smx_process_get_info(smx_process_t p)
45 assert(is_in_dynar(p, mc_model_checker->process().smx_process_infos)
46 || is_in_dynar(p, mc_model_checker->process().smx_old_process_infos));
47 mc_smx_process_info_t process_info =
48 (mc_smx_process_info_t)
49 ((char*) p - offsetof(s_mc_smx_process_info_t, copy));
53 /** Load the remote swag of processes into a dynar
55 * @param process MCed process
56 * @param target Local dynar (to be filled with copies of `s_smx_process_t`)
57 * @param remote_swag Address of the process SWAG in the remote list
59 static void MC_process_refresh_simix_process_list(
61 xbt_dynar_t target, xbt_swag_t remote_swag)
63 // swag = REMOTE(*simix_global->process_list)
65 process->read_bytes(&swag, sizeof(swag), remote(remote_swag));
68 xbt_dynar_reset(target);
70 // Load each element of the dynar from the MCed process:
72 for (p = (smx_process_t) swag.head; p; ++i) {
74 s_mc_smx_process_info_t info;
78 process->read_bytes(&info.copy, sizeof(info.copy), remote(p));
79 xbt_dynar_push(target, &info);
81 // Lookup next process address:
82 p = (smx_process_t) xbt_swag_getNext(&info.copy, swag.offset);
84 assert(i == swag.count);
87 void MC_process_smx_refresh(mc_process_t process)
89 xbt_assert(mc_mode == MC_MODE_SERVER);
90 xbt_assert(!process->is_self());
91 if (process->cache_flags & MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES)
94 // TODO, avoid to reload `&simix_global`, `simix_global`, `*simix_global`
96 // simix_global_p = REMOTE(simix_global);
97 smx_global_t simix_global_p;
98 process->read_variable("simix_global", &simix_global_p, sizeof(simix_global_p));
100 // simix_global = REMOTE(*simix_global)
101 s_smx_global_t simix_global;
102 process->read_bytes(&simix_global, sizeof(simix_global),
103 remote(simix_global_p));
105 MC_process_refresh_simix_process_list(
106 process, process->smx_process_infos, simix_global.process_list);
107 MC_process_refresh_simix_process_list(
108 process, process->smx_old_process_infos, simix_global.process_to_destroy);
110 process->cache_flags |= MC_PROCESS_CACHE_FLAG_SIMIX_PROCESSES;
113 /** Get the issuer of a simcall (`req->issuer`)
115 * In split-process mode, it does the black magic necessary to get an address
116 * of a (shallow) copy of the data structure the issuer SIMIX process in the local
119 * @param process the MCed process
120 * @param req the simcall (copied in the local process)
122 smx_process_t MC_smx_simcall_get_issuer(smx_simcall_t req)
124 if (mc_mode == MC_MODE_CLIENT)
127 MC_process_smx_refresh(&mc_model_checker->process());
129 // This is the address of the smx_process in the MCed process:
130 void* address = req->issuer;
133 mc_smx_process_info_t p;
135 // Lookup by address:
136 xbt_dynar_foreach_ptr(mc_model_checker->process().smx_process_infos, i, p)
137 if (p->address == address)
139 xbt_dynar_foreach_ptr(mc_model_checker->process().smx_old_process_infos, i, p)
140 if (p->address == address)
143 xbt_die("Issuer not found");
146 smx_process_t MC_smx_resolve_process(smx_process_t process_remote_address)
148 if (!process_remote_address)
150 if (mc_mode == MC_MODE_CLIENT)
151 return process_remote_address;
153 mc_smx_process_info_t process_info = MC_smx_resolve_process_info(process_remote_address);
155 return &process_info->copy;
160 mc_smx_process_info_t MC_smx_resolve_process_info(smx_process_t process_remote_address)
162 if (mc_mode == MC_MODE_CLIENT)
163 xbt_die("No process_info for local process is not enabled.");
166 mc_smx_process_info_t process_info;
167 xbt_dynar_foreach_ptr(mc_model_checker->process().smx_process_infos, index, process_info)
168 if (process_info->address == process_remote_address)
170 xbt_dynar_foreach_ptr(mc_model_checker->process().smx_old_process_infos, index, process_info)
171 if (process_info->address == process_remote_address)
173 xbt_die("Process info not found");
176 const char* MC_smx_process_get_host_name(smx_process_t p)
178 if (mc_mode == MC_MODE_CLIENT)
179 return SIMIX_host_get_name(p->smx_host);
181 mc_process_t process = &mc_model_checker->process();
183 // Currently, smx_host_t = xbt_dictelm_t.
184 // TODO, add an static_assert on this if switching to C++
185 // The host name is host->key and the host->key_len==strlen(host->key).
186 s_xbt_dictelm_t host_copy;
187 mc_smx_process_info_t info = MC_smx_process_get_info(p);
188 if (!info->hostname) {
190 // Read the hostname from the MCed process:
191 process->read_bytes(&host_copy, sizeof(host_copy), remote(p->smx_host));
192 int len = host_copy.key_len + 1;
194 process->read_bytes(hostname, len, remote(host_copy.key));
195 info->hostname = mc_model_checker->get_host_name(hostname);
197 return info->hostname;
200 const char* MC_smx_process_get_name(smx_process_t p)
202 mc_process_t process = &mc_model_checker->process();
203 if (mc_mode == MC_MODE_CLIENT)
208 mc_smx_process_info_t info = MC_smx_process_get_info(p);
210 info->name = process->read_string(p->name);
215 int MC_smpi_process_count(void)
217 if (mc_mode == MC_MODE_CLIENT)
218 return smpi_process_count();
221 mc_model_checker->process().read_variable("process_count",
227 unsigned long MC_smx_get_maxpid(void)
229 unsigned long maxpid;
230 mc_model_checker->process().read_variable("simix_process_maxpid",
231 &maxpid, sizeof(maxpid));