1 /* Copyright (c) 2008-2015. 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 <simgrid_config.h>
14 #include <xbt/asserts.h>
15 #include <xbt/dynar.h>
17 #include <simgrid/simix.h>
19 #include "src/mc/mc_base.h"
20 #include "src/simix/smx_private.h"
21 #include "src/mc/mc_replay.h"
23 #include "src/mc/mc_protocol.h"
25 #include "src/simix/Synchro.h"
26 #include "src/simix/SynchroIo.hpp"
27 #include "src/simix/SynchroComm.hpp"
28 #include "src/simix/SynchroRaw.hpp"
29 #include "src/simix/SynchroSleep.hpp"
30 #include "src/simix/SynchroExec.hpp"
33 #include "src/mc/mc_request.h"
34 #include "src/mc/Process.hpp"
35 #include "src/mc/ModelChecker.hpp"
36 #include "src/mc/mc_smx.h"
40 using simgrid::mc::remote;
43 XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
45 int MC_random(int min, int max)
48 xbt_assert(mc_model_checker == nullptr);
49 /* TODO, if the MC is disabled we do not really need to make a simcall for
52 return simcall_mc_random(min, max);
58 void wait_for_requests(void)
61 xbt_assert(mc_model_checker == nullptr);
64 smx_process_t process;
68 while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
69 SIMIX_process_runall();
70 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
71 req = &process->simcall;
72 if (req->call != SIMCALL_NONE && !simgrid::mc::request_is_visible(req))
73 SIMIX_simcall_handle(req, 0);
78 // Called from both MCer and MCed:
79 bool request_is_enabled(smx_simcall_t req)
81 unsigned int index = 0;
82 // TODO, add support for the subtypes?
88 case SIMCALL_COMM_WAIT:
90 /* FIXME: check also that src and dst processes are not suspended */
91 simgrid::simix::Comm *act = static_cast<simgrid::simix::Comm*>(simcall_comm_wait__get__comm(req));
94 // Fetch from MCed memory:
96 simgrid::mc::Remote<simgrid::simix::Comm> temp_comm;
97 if (mc_model_checker != nullptr) {
98 mc_model_checker->process().read(temp_comm, remote(act));
99 act = static_cast<simgrid::simix::Comm*>(temp_comm.getBuffer());
103 if (simcall_comm_wait__get__timeout(req) >= 0) {
104 /* If it has a timeout it will be always be enabled, because even if the
105 * communication is not ready, it can timeout and won't block. */
106 if (_sg_mc_timeout == 1)
109 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
110 else if (act->detached && act->src_proc == nullptr
111 && act->type == SIMIX_COMM_READY)
112 return (act->dst_proc != nullptr);
113 return (act->src_proc && act->dst_proc);
116 case SIMCALL_COMM_WAITANY: {
118 simgrid::simix::Comm *act = static_cast<simgrid::simix::Comm*>(simcall_comm_wait__get__comm(req));
121 s_xbt_dynar_t comms_buffer;
122 size_t buffer_size = 0;
123 if (mc_model_checker != nullptr) {
125 mc_model_checker->process().read(
126 &comms_buffer, remote(simcall_comm_waitany__get__comms(req)));
127 assert(comms_buffer.elmsize == sizeof(act));
128 buffer_size = comms_buffer.elmsize * comms_buffer.used;
129 comms = &comms_buffer;
131 comms = simcall_comm_waitany__get__comms(req);
133 // Read all the dynar buffer:
134 char buffer[buffer_size];
135 if (mc_model_checker != nullptr)
136 mc_model_checker->process().read_bytes(buffer, sizeof(buffer),
137 remote(comms->data));
139 comms = simcall_comm_waitany__get__comms(req);
142 for (index = 0; index < comms->used; ++index) {
144 // Fetch act from MCed memory:
146 simgrid::mc::Remote<simgrid::simix::Comm> temp_comm;
147 if (mc_model_checker != nullptr) {
148 memcpy(&act, buffer + comms->elmsize * index, sizeof(act));
149 mc_model_checker->process().read(temp_comm, remote(act));
150 act = static_cast<simgrid::simix::Comm*>(temp_comm.getBuffer());
154 act = xbt_dynar_get_as(comms, index, simgrid::simix::Comm*);
155 if (act->src_proc && act->dst_proc)
161 case SIMCALL_MUTEX_TRYLOCK:
164 case SIMCALL_MUTEX_LOCK: {
165 smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req);
167 s_smx_mutex_t temp_mutex;
168 if (mc_model_checker != nullptr) {
169 mc_model_checker->process().read(&temp_mutex, remote(mutex));
174 if(mutex->owner == nullptr)
177 else if (mc_model_checker != nullptr) {
178 simgrid::mc::Process& modelchecked = mc_model_checker->process();
179 // TODO, *(mutex->owner) :/
180 return modelchecked.resolveProcess(simgrid::mc::remote(mutex->owner))->pid
181 == modelchecked.resolveProcess(simgrid::mc::remote(req->issuer))->pid;
185 return mutex->owner->pid == req->issuer->pid;
189 /* The rest of the requests are always enabled */
194 bool request_is_visible(smx_simcall_t req)
196 return req->call == SIMCALL_COMM_ISEND
197 || req->call == SIMCALL_COMM_IRECV
198 || req->call == SIMCALL_COMM_WAIT
199 || req->call == SIMCALL_COMM_WAITANY
200 || req->call == SIMCALL_COMM_TEST
201 || req->call == SIMCALL_COMM_TESTANY
202 || req->call == SIMCALL_MC_RANDOM
203 || req->call == SIMCALL_MUTEX_LOCK
204 || req->call == SIMCALL_MUTEX_TRYLOCK
211 static int prng_random(int min, int max)
213 unsigned long output_size = ((unsigned long) max - (unsigned long) min) + 1;
214 unsigned long input_size = (unsigned long) RAND_MAX + 1;
215 unsigned long reject_size = input_size % output_size;
216 unsigned long accept_size = input_size - reject_size; // module*accept_size
218 // Use rejection in order to avoid skew
222 x = (unsigned long) random();
224 x = (unsigned long) rand();
226 } while( x >= accept_size );
227 return min + (x % output_size);
230 int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max)
232 if (!MC_is_active() && !MC_record_path)
233 return prng_random(min, max);
234 return simcall->mc_value;