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. */
9 #include <simgrid_config.h>
12 #include <xbt/asserts.h>
13 #include <xbt/dynar.h>
15 #include <simgrid/simix.h>
17 #include "src/mc/mc_base.h"
18 #include "src/simix/smx_private.h"
19 #include "src/mc/mc_replay.h"
21 #include "src/mc/mc_protocol.h"
23 #include "src/kernel/activity/Synchro.h"
24 #include "src/kernel/activity/SynchroIo.hpp"
25 #include "src/kernel/activity/SynchroComm.hpp"
26 #include "src/kernel/activity/SynchroRaw.hpp"
27 #include "src/kernel/activity/SynchroSleep.hpp"
28 #include "src/kernel/activity/SynchroExec.hpp"
31 #include "src/mc/mc_request.h"
32 #include "src/mc/Process.hpp"
33 #include "src/mc/ModelChecker.hpp"
34 #include "src/mc/mc_smx.h"
38 using simgrid::mc::remote;
41 XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
43 int MC_random(int min, int max)
46 xbt_assert(mc_model_checker == nullptr);
47 /* TODO, if the MC is disabled we do not really need to make a simcall for
50 return simcall_mc_random(min, max);
56 void wait_for_requests(void)
59 xbt_assert(mc_model_checker == nullptr);
62 smx_process_t process;
66 while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
67 SIMIX_process_runall();
68 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
69 req = &process->simcall;
70 if (req->call != SIMCALL_NONE && !simgrid::mc::request_is_visible(req))
71 SIMIX_simcall_handle(req, 0);
76 // Called from both MCer and MCed:
77 bool request_is_enabled(smx_simcall_t req)
79 unsigned int index = 0;
80 // TODO, add support for the subtypes?
86 case SIMCALL_COMM_WAIT:
88 /* FIXME: check also that src and dst processes are not suspended */
89 simgrid::simix::Comm *act = static_cast<simgrid::simix::Comm*>(simcall_comm_wait__get__comm(req));
92 // Fetch from MCed memory:
94 simgrid::mc::Remote<simgrid::simix::Comm> temp_comm;
95 if (mc_model_checker != nullptr) {
96 mc_model_checker->process().read(temp_comm, remote(act));
97 act = static_cast<simgrid::simix::Comm*>(temp_comm.getBuffer());
101 if (simcall_comm_wait__get__timeout(req) >= 0) {
102 /* If it has a timeout it will be always be enabled, because even if the
103 * communication is not ready, it can timeout and won't block. */
104 if (_sg_mc_timeout == 1)
107 /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
108 else if (act->detached && act->src_proc == nullptr
109 && act->type == SIMIX_COMM_READY)
110 return (act->dst_proc != nullptr);
111 return (act->src_proc && act->dst_proc);
114 case SIMCALL_COMM_WAITANY: {
116 simgrid::simix::Comm *act = static_cast<simgrid::simix::Comm*>(simcall_comm_wait__get__comm(req));
119 s_xbt_dynar_t comms_buffer;
120 size_t buffer_size = 0;
121 if (mc_model_checker != nullptr) {
123 mc_model_checker->process().read(
124 &comms_buffer, remote(simcall_comm_waitany__get__comms(req)));
125 assert(comms_buffer.elmsize == sizeof(act));
126 buffer_size = comms_buffer.elmsize * comms_buffer.used;
127 comms = &comms_buffer;
129 comms = simcall_comm_waitany__get__comms(req);
131 // Read all the dynar buffer:
132 char buffer[buffer_size];
133 if (mc_model_checker != nullptr)
134 mc_model_checker->process().read_bytes(buffer, sizeof(buffer),
135 remote(comms->data));
137 comms = simcall_comm_waitany__get__comms(req);
140 for (index = 0; index < comms->used; ++index) {
142 // Fetch act from MCed memory:
144 simgrid::mc::Remote<simgrid::simix::Comm> temp_comm;
145 if (mc_model_checker != nullptr) {
146 memcpy(&act, buffer + comms->elmsize * index, sizeof(act));
147 mc_model_checker->process().read(temp_comm, remote(act));
148 act = static_cast<simgrid::simix::Comm*>(temp_comm.getBuffer());
152 act = xbt_dynar_get_as(comms, index, simgrid::simix::Comm*);
153 if (act->src_proc && act->dst_proc)
159 case SIMCALL_MUTEX_TRYLOCK:
162 case SIMCALL_MUTEX_LOCK: {
163 smx_mutex_t mutex = simcall_mutex_lock__get__mutex(req);
165 simgrid::mc::Remote<simgrid::simix::Mutex> temp_mutex;
166 if (mc_model_checker != nullptr) {
167 mc_model_checker->process().read(temp_mutex.getBuffer(), remote(mutex));
168 mutex = temp_mutex.getBuffer();
172 if(mutex->owner == nullptr)
175 else if (mc_model_checker != nullptr) {
176 simgrid::mc::Process& modelchecked = mc_model_checker->process();
177 // TODO, *(mutex->owner) :/
178 return modelchecked.resolveProcess(simgrid::mc::remote(mutex->owner))->pid
179 == modelchecked.resolveProcess(simgrid::mc::remote(req->issuer))->pid;
183 return mutex->owner->pid == req->issuer->pid;
187 /* The rest of the requests are always enabled */
192 bool request_is_visible(smx_simcall_t req)
194 return req->call == SIMCALL_COMM_ISEND
195 || req->call == SIMCALL_COMM_IRECV
196 || req->call == SIMCALL_COMM_WAIT
197 || req->call == SIMCALL_COMM_WAITANY
198 || req->call == SIMCALL_COMM_TEST
199 || req->call == SIMCALL_COMM_TESTANY
200 || req->call == SIMCALL_MC_RANDOM
201 || req->call == SIMCALL_MUTEX_LOCK
202 || req->call == SIMCALL_MUTEX_TRYLOCK
209 static int prng_random(int min, int max)
211 unsigned long output_size = ((unsigned long) max - (unsigned long) min) + 1;
212 unsigned long input_size = (unsigned long) RAND_MAX + 1;
213 unsigned long reject_size = input_size % output_size;
214 unsigned long accept_size = input_size - reject_size; // module*accept_size
216 // Use rejection in order to avoid skew
220 x = (unsigned long) random();
222 x = (unsigned long) rand();
224 } while( x >= accept_size );
225 return min + (x % output_size);
228 int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max)
230 if (!MC_is_active() && !MC_record_path)
231 return prng_random(min, max);
232 return simcall->mc_value;