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[mc] Fix error in dependency checking
[simgrid.git] / src / mc / mc_request.cpp
index e28f119..ef553fd 100644 (file)
@@ -1,4 +1,4 @@
-/* Copyright (c) 2008-2014. The SimGrid Team.
+/* Copyright (c) 2008-2015. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -10,6 +10,7 @@
 #include "mc_safety.h"
 #include "mc_private.h"
 #include "mc_smx.h"
+#include "mc_xbt.hpp"
 
 using simgrid::mc::remote;
 
@@ -21,21 +22,36 @@ XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_request, mc,
 static char *pointer_to_string(void *pointer);
 static char *buff_size_to_string(size_t size);
 
-// Those are MC_state_get_internal_request(state)
-int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
+static inline
+smx_synchro_t MC_get_comm(smx_simcall_t r)
 {
-  if (mc_reduce_kind == e_mc_reduce_none)
-    return TRUE;
-
-  if (r1->issuer == r2->issuer)
-    return FALSE;
+  switch (r->call ) {
+  case SIMCALL_COMM_WAIT:
+    return simcall_comm_wait__get__comm(r);
+  case SIMCALL_COMM_TEST:
+    return simcall_comm_test__get__comm(r);
+  default:
+    return nullptr;
+  }
+}
 
-  /* Wait with timeout transitions are not considered by the independance theorem, thus we consider them as dependant with all other transitions */
-  if ((r1->call == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(r1) > 0)
-      || (r2->call == SIMCALL_COMM_WAIT
-          && simcall_comm_wait__get__timeout(r2) > 0))
-    return TRUE;
+static inline
+smx_rdv_t MC_get_rdv(smx_simcall_t r)
+{
+  switch(r->call) {
+  case SIMCALL_COMM_ISEND:
+    return simcall_comm_isend__get__rdv(r);
+  case SIMCALL_COMM_IRECV:
+    return simcall_comm_irecv__get__rdv(r);
+  default:
+    return nullptr;
+  }
+}
 
+// Does half the job
+static inline
+int MC_request_depend_asymmetric(smx_simcall_t r1, smx_simcall_t r2)
+{
   if (r1->call == SIMCALL_COMM_ISEND && r2->call == SIMCALL_COMM_IRECV)
     return FALSE;
 
@@ -44,27 +60,13 @@ int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
 
   // Those are internal requests, we do not need indirection
   // because those objects are copies:
-  smx_synchro_t synchro1 = NULL, synchro2 = NULL;
-  if (r1->call == SIMCALL_COMM_WAIT) {
-    synchro1 = simcall_comm_wait__get__comm(r1);
-  }
-  if (r2->call == SIMCALL_COMM_WAIT) {
-    synchro2 = simcall_comm_wait__get__comm(r2);
-  }
-  if (r1->call == SIMCALL_COMM_TEST) {
-    synchro1 = simcall_comm_test__get__comm(r1);
-  }
-  if (r2->call == SIMCALL_COMM_TEST) {
-    synchro2 = simcall_comm_test__get__comm(r2);
-  }
+  smx_synchro_t synchro1 = MC_get_comm(r1);
+  smx_synchro_t synchro2 = MC_get_comm(r2);
 
   if ((r1->call == SIMCALL_COMM_ISEND || r1->call == SIMCALL_COMM_IRECV)
       && r2->call == SIMCALL_COMM_WAIT) {
 
-    smx_rdv_t rdv =
-        r1->call ==
-        SIMCALL_COMM_ISEND ? simcall_comm_isend__get__rdv(r1) :
-        simcall_comm_irecv__get__rdv(r1);
+    smx_rdv_t rdv = MC_get_rdv(r1);
 
     if (rdv != synchro2->comm.rdv_cpy
         && simcall_comm_wait__get__timeout(r2) <= 0)
@@ -89,38 +91,6 @@ int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
       return FALSE;
   }
 
-  if ((r2->call == SIMCALL_COMM_ISEND || r2->call == SIMCALL_COMM_IRECV)
-      && r1->call == SIMCALL_COMM_WAIT) {
-
-    smx_rdv_t rdv =
-        r2->call ==
-        SIMCALL_COMM_ISEND ? simcall_comm_isend__get__rdv(r2) :
-        simcall_comm_irecv__get__rdv(r2);
-
-    if (rdv != synchro1->comm.rdv_cpy
-        && simcall_comm_wait__get__timeout(r1) <= 0)
-      return FALSE;
-
-    if ((r2->issuer != synchro1->comm.src_proc)
-        && (r2->issuer != synchro1->comm.dst_proc)
-        && simcall_comm_wait__get__timeout(r1) <= 0)
-      return FALSE;
-
-    if ((r2->call == SIMCALL_COMM_ISEND)
-        && (synchro1->comm.type == SIMIX_COMM_SEND)
-        && (synchro1->comm.src_buff !=
-            simcall_comm_isend__get__src_buff(r2))
-        && simcall_comm_wait__get__timeout(r1) <= 0)
-      return FALSE;
-
-    if ((r2->call == SIMCALL_COMM_IRECV)
-        && (synchro1->comm.type == SIMIX_COMM_RECEIVE)
-        && (synchro1->comm.dst_buff !=
-            simcall_comm_irecv__get__dst_buff(r2))
-        && simcall_comm_wait__get__timeout(r1) <= 0)
-      return FALSE;
-  }
-
   /* FIXME: the following rule assumes that the result of the
    * isend/irecv call is not stored in a buffer used in the
    * test call. */
@@ -128,68 +98,22 @@ int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
      &&  r2->call == SIMCALL_COMM_TEST)
      return FALSE; */
 
-  /* FIXME: the following rule assumes that the result of the
-   * isend/irecv call is not stored in a buffer used in the
-   * test call.*/
-  /*if(   (r2->call == SIMCALL_COMM_ISEND || r2->call == SIMCALL_COMM_IRECV)
-     && r1->call == SIMCALL_COMM_TEST)
-     return FALSE; */
-
-  if (r1->call == SIMCALL_COMM_ISEND && r2->call == SIMCALL_COMM_ISEND
-      && simcall_comm_isend__get__rdv(r1) != simcall_comm_isend__get__rdv(r2))
-    return FALSE;
-
-  if (r1->call == SIMCALL_COMM_IRECV && r2->call == SIMCALL_COMM_IRECV
-      && simcall_comm_irecv__get__rdv(r1) != simcall_comm_irecv__get__rdv(r2))
-    return FALSE;
-
   if (r1->call == SIMCALL_COMM_WAIT
       && (r2->call == SIMCALL_COMM_WAIT || r2->call == SIMCALL_COMM_TEST)
       && (synchro1->comm.src_proc == NULL || synchro1->comm.dst_proc == NULL))
     return FALSE;
 
-  if (r2->call == SIMCALL_COMM_WAIT
-      && (r1->call == SIMCALL_COMM_WAIT || r1->call == SIMCALL_COMM_TEST)
-      && (synchro2->comm.src_proc == NULL || synchro2->comm.dst_proc == NULL))
-      return FALSE;
-
-  if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_WAIT
-      && synchro1->comm.src_buff == synchro2->comm.src_buff
-      && synchro2->comm.dst_buff == synchro2->comm.dst_buff)
-    return FALSE;
-
-  if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_WAIT
-      && synchro1->comm.src_buff != NULL
-      && synchro1->comm.dst_buff != NULL
-      && synchro2->comm.src_buff != NULL
-      && synchro2->comm.dst_buff != NULL
-      && synchro1->comm.dst_buff != synchro2->comm.src_buff
-      && synchro1->comm.dst_buff != synchro2->comm.dst_buff
-      && synchro2->comm.dst_buff != synchro1->comm.src_buff)
-    return FALSE;
-
   if (r1->call == SIMCALL_COMM_TEST &&
       (simcall_comm_test__get__comm(r1) == NULL
        || synchro1->comm.src_buff == NULL
        || synchro1->comm.dst_buff == NULL))
     return FALSE;
 
-  if (r2->call == SIMCALL_COMM_TEST &&
-      (simcall_comm_test__get__comm(r2) == NULL
-       || synchro2->comm.src_buff == NULL
-       || synchro2->comm.dst_buff == NULL))
-    return FALSE;
-
   if (r1->call == SIMCALL_COMM_TEST && r2->call == SIMCALL_COMM_WAIT
       && synchro1->comm.src_buff == synchro2->comm.src_buff
       && synchro1->comm.dst_buff == synchro2->comm.dst_buff)
     return FALSE;
 
-  if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_TEST
-      && synchro1->comm.src_buff == synchro2->comm.src_buff
-      && synchro1->comm.dst_buff == synchro2->comm.dst_buff)
-    return FALSE;
-
   if (r1->call == SIMCALL_COMM_WAIT && r2->call == SIMCALL_COMM_TEST
       && synchro1->comm.src_buff != NULL
       && synchro1->comm.dst_buff != NULL
@@ -200,17 +124,55 @@ int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
       && synchro2->comm.dst_buff != synchro1->comm.src_buff)
     return FALSE;
 
-  if (r1->call == SIMCALL_COMM_TEST && r2->call == SIMCALL_COMM_WAIT
-      && synchro1->comm.src_buff != NULL
-      && synchro1->comm.dst_buff != NULL
-      && synchro2->comm.src_buff != NULL
-      && synchro2->comm.dst_buff != NULL
-      && synchro1->comm.dst_buff != synchro2->comm.src_buff
-      && synchro1->comm.dst_buff != synchro2->comm.dst_buff
-      && synchro2->comm.dst_buff != synchro1->comm.src_buff)
+  return TRUE;
+}
+
+// Those are MC_state_get_internal_request(state)
+int MC_request_depend(smx_simcall_t r1, smx_simcall_t r2)
+{
+  if (mc_reduce_kind == e_mc_reduce_none)
+    return TRUE;
+
+  if (r1->issuer == r2->issuer)
     return FALSE;
 
-  return TRUE;
+  /* Wait with timeout transitions are not considered by the independance theorem, thus we consider them as dependant with all other transitions */
+  if ((r1->call == SIMCALL_COMM_WAIT && simcall_comm_wait__get__timeout(r1) > 0)
+      || (r2->call == SIMCALL_COMM_WAIT
+          && simcall_comm_wait__get__timeout(r2) > 0))
+    return TRUE;
+
+  if (r1->call != r2->call)
+    return MC_request_depend_asymmetric(r1, r2)
+      && MC_request_depend_asymmetric(r2, r1);
+
+  // Those are internal requests, we do not need indirection
+  // because those objects are copies:
+  smx_synchro_t synchro1 = MC_get_comm(r1);
+  smx_synchro_t synchro2 = MC_get_comm(r2);
+
+  switch(r1->call) {
+  case SIMCALL_COMM_ISEND:
+    return simcall_comm_isend__get__rdv(r1) == simcall_comm_isend__get__rdv(r2);
+  case SIMCALL_COMM_IRECV:
+    return simcall_comm_irecv__get__rdv(r1) == simcall_comm_irecv__get__rdv(r2);
+  case SIMCALL_COMM_WAIT:
+    if (synchro1->comm.src_buff == synchro2->comm.src_buff
+        && synchro1->comm.dst_buff == synchro2->comm.dst_buff)
+      return FALSE;
+    else if (synchro1->comm.src_buff != NULL
+        && synchro1->comm.dst_buff != NULL
+        && synchro2->comm.src_buff != NULL
+        && synchro2->comm.dst_buff != NULL
+        && synchro1->comm.dst_buff != synchro2->comm.src_buff
+        && synchro1->comm.dst_buff != synchro2->comm.dst_buff
+        && synchro2->comm.dst_buff != synchro1->comm.src_buff)
+      return FALSE;
+    else
+      return TRUE;
+  default:
+    return TRUE;
+  }
 }
 
 static char *pointer_to_string(void *pointer)
@@ -256,7 +218,7 @@ char *MC_request_to_string(smx_simcall_t req, int value, e_mc_request_type_t req
     type = "iSend";
     char* p = pointer_to_string(simcall_comm_isend__get__src_buff(req));
     char* bs = buff_size_to_string(simcall_comm_isend__get__src_buff_size(req));
-    if (issuer->smx_host)
+    if (issuer->host)
       args =
           bprintf("src=(%lu)%s (%s), buff=%s, size=%s", issuer->pid,
                   MC_smx_process_get_host_name(issuer),
@@ -283,7 +245,7 @@ char *MC_request_to_string(smx_simcall_t req, int value, e_mc_request_type_t req
     type = "iRecv";
     char* p = pointer_to_string(simcall_comm_irecv__get__dst_buff(req));
     char* bs = buff_size_to_string(size);
-    if (issuer->smx_host)
+    if (issuer->host)
       args =
           bprintf("dst=(%lu)%s (%s), buff=%s, size=%s", issuer->pid,
                   MC_smx_process_get_host_name(issuer),
@@ -374,8 +336,8 @@ char *MC_request_to_string(smx_simcall_t req, int value, e_mc_request_type_t req
       &comms, sizeof(comms), remote(simcall_comm_waitany__get__comms(req)));
     if (!xbt_dynar_is_empty(&comms)) {
       smx_synchro_t remote_sync;
-      MC_process_read_dynar_element(&mc_model_checker->process(),
-        &remote_sync, simcall_comm_waitany__get__comms(req), value,
+      read_element(mc_model_checker->process(),
+        &remote_sync, remote(simcall_comm_waitany__get__comms(req)), value,
         sizeof(remote_sync));
       char* p = pointer_to_string(remote_sync);
       args = bprintf("comm=%s (%d of %lu)",
@@ -394,18 +356,26 @@ char *MC_request_to_string(smx_simcall_t req, int value, e_mc_request_type_t req
     } else {
       type = "TestAny";
       args =
-          bprintf("(%d of %lu)", value + 1,
-                  MC_process_read_dynar_length(&mc_model_checker->process(),
+          bprintf("(%d of %zu)", value + 1,
+                  read_length(mc_model_checker->process(),
                     simcall_comm_testany__get__comms(req)));
     }
     break;
 
+  case SIMCALL_MUTEX_TRYLOCK:
   case SIMCALL_MUTEX_LOCK: {
-    type = "Mutex LOCK";
+    if (req->call == SIMCALL_MUTEX_LOCK)
+      type = "Mutex LOCK";
+    else
+      type = "Mutex TRYLOCK";
 
     s_smx_mutex_t mutex;
     mc_model_checker->process().read_bytes(&mutex, sizeof(mutex),
-      remote(simcall_mutex_lock__get__mutex(req)));
+      remote(
+        req->call == SIMCALL_MUTEX_LOCK
+        ? simcall_mutex_lock__get__mutex(req)
+        : simcall_mutex_trylock__get__mutex(req)
+      ));
     s_xbt_swag_t mutex_sleeping;
     mc_model_checker->process().read_bytes(&mutex_sleeping, sizeof(mutex_sleeping),
       remote(mutex.sleeping));
@@ -502,15 +472,17 @@ int MC_request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx)
     break;
 
   case SIMCALL_COMM_WAITANY: {
-    MC_process_read_dynar_element(
-      &mc_model_checker->process(), &remote_act, simcall_comm_waitany__get__comms(req),
+    read_element(
+      mc_model_checker->process(), &remote_act,
+      remote(simcall_comm_waitany__get__comms(req)),
       idx, sizeof(remote_act));
     }
     break;
 
   case SIMCALL_COMM_TESTANY: {
-    MC_process_read_dynar_element(
-      &mc_model_checker->process(), &remote_act, simcall_comm_testany__get__comms(req),
+    read_element(
+      mc_model_checker->process(), &remote_act,
+      remote(simcall_comm_testany__get__comms(req)),
       idx, sizeof(remote_act));
     }
     break;
@@ -538,7 +510,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
 
   switch (req->call) {
   case SIMCALL_COMM_ISEND:
-    if (issuer->smx_host)
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] iSend", issuer->pid,
                   MC_smx_process_get_host_name(issuer));
@@ -547,7 +519,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
     break;
 
   case SIMCALL_COMM_IRECV:
-    if (issuer->smx_host)
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] iRecv", issuer->pid,
                   MC_smx_process_get_host_name(issuer));
@@ -557,7 +529,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
 
   case SIMCALL_COMM_WAIT: {
     if (value == -1) {
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] WaitTimeout", issuer->pid,
                     MC_smx_process_get_host_name(issuer));
@@ -571,7 +543,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
 
       smx_process_t src_proc = MC_smx_resolve_process(synchro.comm.src_proc);
       smx_process_t dst_proc = MC_smx_resolve_process(synchro.comm.dst_proc);
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] Wait [(%lu)->(%lu)]", issuer->pid,
                     MC_smx_process_get_host_name(issuer),
@@ -592,14 +564,14 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
     mc_model_checker->process().read_bytes(&synchro,
       sizeof(synchro), remote(remote_act));
     if (synchro.comm.src_proc == NULL || synchro.comm.dst_proc == NULL) {
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] Test FALSE", issuer->pid,
                     MC_smx_process_get_host_name(issuer));
       else
         label = bprintf("[(%lu)] Test FALSE", issuer->pid);
     } else {
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] Test TRUE", issuer->pid,
                     MC_smx_process_get_host_name(issuer));
@@ -610,9 +582,9 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
   }
 
   case SIMCALL_COMM_WAITANY: {
-    unsigned long comms_size = MC_process_read_dynar_length(
-      &mc_model_checker->process(), simcall_comm_waitany__get__comms(req));
-    if (issuer->smx_host)
+    unsigned long comms_size = read_length(
+      mc_model_checker->process(), remote(simcall_comm_waitany__get__comms(req)));
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] WaitAny [%d of %lu]", issuer->pid,
                   MC_smx_process_get_host_name(issuer), value + 1,
@@ -626,14 +598,14 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
 
   case SIMCALL_COMM_TESTANY:
     if (value == -1) {
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] TestAny FALSE", issuer->pid,
                     MC_smx_process_get_host_name(issuer));
       else
         label = bprintf("[(%lu)] TestAny FALSE", issuer->pid);
     } else {
-      if (issuer->smx_host)
+      if (issuer->host)
         label =
             bprintf("[(%lu)%s] TestAny TRUE [%d of %lu]", issuer->pid,
                     MC_smx_process_get_host_name(issuer), value + 1,
@@ -646,12 +618,16 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
     }
     break;
 
+  case SIMCALL_MUTEX_TRYLOCK:
+    label = bprintf("[(%lu)] Mutex TRYLOCK", issuer->pid);
+    break;
+
   case SIMCALL_MUTEX_LOCK:
-    label = bprintf("[(%lu)] Mutex LOCK", req->issuer->pid);
+    label = bprintf("[(%lu)] Mutex LOCK", issuer->pid);
     break;
 
   case SIMCALL_MC_RANDOM:
-    if (issuer->smx_host)
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] MC_RANDOM (%d)", issuer->pid,
                   MC_smx_process_get_host_name(issuer), value);
@@ -660,7 +636,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
     break;
 
   case SIMCALL_MC_SNAPSHOT:
-    if (issuer->smx_host)
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] MC_SNAPSHOT", issuer->pid,
                   MC_smx_process_get_host_name(issuer));
@@ -669,7 +645,7 @@ char *MC_request_get_dot_output(smx_simcall_t req, int value)
     break;
 
   case SIMCALL_MC_COMPARE_SNAPSHOTS:
-    if (issuer->smx_host)
+    if (issuer->host)
       label =
           bprintf("[(%lu)%s] MC_COMPARE_SNAPSHOTS", issuer->pid,
                   MC_smx_process_get_host_name(issuer));