#include "src/mc/explo/odpor/ReversibleRaceCalculator.hpp"
#include "src/mc/explo/odpor/Execution.hpp"
+#include "src/mc/transition/Transition.hpp"
+#include "src/mc/transition/TransitionSynchro.hpp"
#include <functional>
#include <unordered_map>
#include <xbt/asserts.h>
#include <xbt/ex.h>
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_odpor_reversible_race, mc_dfs, "ODPOR exploration algorithm of the model-checker");
+
namespace simgrid::mc::odpor {
+/**
+ The reversible race detector should only be used if we already have the assumption
+ e1 <* e2 (see Source set: a foundation for ODPOR). In particular this means that :
+ - e1 -->_E e2
+ - proc(e1) != proc(e2)
+ - there is no event e3 s.t. e1 --> e3 --> e2
+*/
+
bool ReversibleRaceCalculator::is_race_reversible(const Execution& E, Execution::EventHandle e1,
Execution::EventHandle e2)
{
using Handler = std::function<bool(const Execution&, Execution::EventHandle, const Transition*)>;
using HandlerMap = std::unordered_map<Action, Handler>;
- const static HandlerMap handlers =
- HandlerMap{{Action::COMM_ASYNC_RECV, &ReversibleRaceCalculator::is_race_reversible_CommRecv},
- {Action::COMM_ASYNC_SEND, &ReversibleRaceCalculator::is_race_reversible_CommSend},
- {Action::COMM_WAIT, &ReversibleRaceCalculator::is_race_reversible_CommWait}};
+ const static HandlerMap handlers = {
+ {Action::ACTOR_JOIN, &ReversibleRaceCalculator::is_race_reversible_ActorJoin},
+ {Action::BARRIER_ASYNC_LOCK, &ReversibleRaceCalculator::is_race_reversible_BarrierAsyncLock},
+ {Action::BARRIER_WAIT, &ReversibleRaceCalculator::is_race_reversible_BarrierWait},
+ {Action::COMM_ASYNC_SEND, &ReversibleRaceCalculator::is_race_reversible_CommSend},
+ {Action::COMM_ASYNC_RECV, &ReversibleRaceCalculator::is_race_reversible_CommRecv},
+ {Action::COMM_TEST, &ReversibleRaceCalculator::is_race_reversible_CommTest},
+ {Action::COMM_WAIT, &ReversibleRaceCalculator::is_race_reversible_CommWait},
+ {Action::MUTEX_ASYNC_LOCK, &ReversibleRaceCalculator::is_race_reversible_MutexAsyncLock},
+ {Action::MUTEX_TEST, &ReversibleRaceCalculator::is_race_reversible_MutexTest},
+ {Action::MUTEX_TRYLOCK, &ReversibleRaceCalculator::is_race_reversible_MutexTrylock},
+ {Action::MUTEX_UNLOCK, &ReversibleRaceCalculator::is_race_reversible_MutexUnlock},
+ {Action::MUTEX_WAIT, &ReversibleRaceCalculator::is_race_reversible_MutexWait},
+ {Action::OBJECT_ACCESS, &ReversibleRaceCalculator::is_race_reversible_ObjectAccess},
+ {Action::RANDOM, &ReversibleRaceCalculator::is_race_reversible_Random},
+ {Action::SEM_ASYNC_LOCK, &ReversibleRaceCalculator::is_race_reversible_SemAsyncLock},
+ {Action::SEM_UNLOCK, &ReversibleRaceCalculator::is_race_reversible_SemUnlock},
+ {Action::SEM_WAIT, &ReversibleRaceCalculator::is_race_reversible_SemWait},
+ {Action::TESTANY, &ReversibleRaceCalculator::is_race_reversible_TestAny},
+ {Action::WAITANY, &ReversibleRaceCalculator::is_race_reversible_WaitAny}};
- const auto e2_action = E.get_transition_for_handle(e2);
+ const auto* e2_action = E.get_transition_for_handle(e2);
if (const auto handler = handlers.find(e2_action->type_); handler != handlers.end()) {
return handler->second(E, e1, e2_action);
} else {
- xbt_assert(false,
- "There is currently no specialized computation for the transition "
- "'%s' for computing reversible races in ODPOR, so the model checker cannot "
- "determine how to proceed. Please submit a bug report requesting "
- "that the transition be supported in SimGrid using ODPPR and consider "
- "using the other model-checking algorithms supported by SimGrid instead "
- "in the meantime",
- e2_action->to_string().c_str());
- DIE_IMPOSSIBLE;
+ xbt_die("There is currently no specialized computation for the transition "
+ "'%s' for computing reversible races in ODPOR, so the model checker cannot "
+ "determine how to proceed. Please submit a bug report requesting "
+ "that the transition be supported in SimGrid using ODPPR and consider "
+ "using the other model-checking algorithms supported by SimGrid instead "
+ "in the meantime",
+ e2_action->to_string().c_str());
}
}
-bool ReversibleRaceCalculator::is_race_reversible_CommRecv(const Execution&, Execution::EventHandle e1,
- const Transition* e2)
+bool ReversibleRaceCalculator::is_race_reversible_ActorJoin(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // ActorJoin races with another event iff its target `T` is the same as
+ // the actor executing the other transition. Clearly, then, we could not join
+ // on that actor `T` and then run a transition by `T`, so no race is reversible
+ return false;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_BarrierAsyncLock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // BarrierAsyncLock is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_BarrierWait(const Execution& E, Execution::EventHandle e1,
+ const Transition* /*e2*/)
+{
+ // If the other event is a barrier lock event, then we
+ // are not reversible; otherwise we are reversible.
+ const auto e1_action = E.get_transition_for_handle(e1)->type_;
+ return e1_action != Transition::Type::BARRIER_ASYNC_LOCK;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_CommRecv(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
{
// CommRecv is always enabled
return true;
}
-bool ReversibleRaceCalculator::is_race_reversible_CommSend(const Execution&, Execution::EventHandle e1,
- const Transition* e2)
+bool ReversibleRaceCalculator::is_race_reversible_CommSend(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
{
// CommSend is always enabled
return true;
}
bool ReversibleRaceCalculator::is_race_reversible_CommWait(const Execution& E, Execution::EventHandle e1,
- const Transition* e2)
+ const Transition* /*e2*/)
{
- // If the other event communication event, then we
- // are not reversible. Otherwise we are reversible.
+ // If the other event is a communication event, then we
+ // are not reversible; otherwise we are reversible.
const auto e1_action = E.get_transition_for_handle(e1)->type_;
- return e1_action != Transition::Type::COMM_ASYNC_SEND and e1_action != Transition::Type::COMM_ASYNC_RECV;
+ return e1_action != Transition::Type::COMM_ASYNC_SEND && e1_action != Transition::Type::COMM_ASYNC_RECV;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_CommTest(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // CommTest is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_MutexAsyncLock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // MutexAsyncLock is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_MutexTest(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // MutexTest is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_MutexTrylock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // MutexTrylock is always enabled
+ return true;
}
-bool ReversibleRaceCalculator::is_race_reversible_CommTest(const Execution&, Execution::EventHandle e1,
- const Transition* e2)
+bool ReversibleRaceCalculator::is_race_reversible_MutexUnlock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
{
+ // MutexUnlock is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_MutexWait(const Execution& E, Execution::EventHandle e1,
+ const Transition* /*e2*/)
+{
+ // Only an Unlock can be dependent with a Wait
+ // and in this case, the Unlock enbaled the wait
+ // Not reversibled
return false;
}
-} // namespace simgrid::mc::odpor
\ No newline at end of file
+bool ReversibleRaceCalculator::is_race_reversible_SemAsyncLock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // SemAsyncLock is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_SemUnlock(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // SemUnlock is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_SemWait(const Execution& E, Execution::EventHandle e1,
+ const Transition* /*e2*/)
+{
+
+ const auto e1_transition = E.get_transition_for_handle(e1);
+ if (e1_transition->type_ == Transition::Type::SEM_UNLOCK &&
+ static_cast<const SemaphoreTransition*>(e1_transition)->get_capacity() <= 1) {
+ return false;
+ }
+ xbt_assert(false, "SEM_WAIT that is dependent with a SEM_UNLOCK should not be reversible. FixMe");
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_ObjectAccess(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // Object access is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_Random(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // Random is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_TestAny(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // TestAny is always enabled
+ return true;
+}
+
+bool ReversibleRaceCalculator::is_race_reversible_WaitAny(const Execution&, Execution::EventHandle /*e1*/,
+ const Transition* /*e2*/)
+{
+ // TODO: We need to check if any of the transitions
+ // waited on occurred before `e1`
+ return true; // Let's overapproximate to not miss branches
+}
+
+} // namespace simgrid::mc::odpor
