New option: smpi/keep-temps to not cleanup temp files

[simgrid.git] / src / smpi / smpi_global.cpp

diff --git a/src/smpi/smpi_global.cpp b/src/smpi/smpi_global.cpp
index 9b6cb53..7f62db8 100644 (file)
--- a/src/smpi/smpi_global.cpp
+++ b/src/smpi/smpi_global.cpp
@@ -95,7 +95,10 @@ int smpi_process_count()
 
 simgrid::smpi::Process* smpi_process()
 {
-  simgrid::MsgActorExt* msgExt = static_cast<simgrid::MsgActorExt*>(SIMIX_process_self()->data);
+  smx_actor_t me = SIMIX_process_self();
+  if (me == nullptr) // This happens sometimes (eg, when linking against NS3 because it pulls openMPI...)
+    return nullptr;
+  simgrid::MsgActorExt* msgExt = static_cast<simgrid::MsgActorExt*>(me->data);
   return static_cast<simgrid::smpi::Process*>(msgExt->data);
 }
 
@@ -573,9 +576,12 @@ int smpi_main(const char* executable, int argc, char *argv[])
         xbt_assert(fdout >= 0, "Cannot write into %s", target_executable.c_str());
 
 #if HAVE_SENDFILE
-        sendfile(fdout, fdin, NULL, fdin_size);
+        ssize_t sent_size = sendfile(fdout, fdin, NULL, fdin_size);
+        xbt_assert(sent_size == fdin_size,
+                   "Error while copying %s: only %zd bytes copied instead of %ld (errno: %d -- %s)",
+                   target_executable.c_str(), sent_size, fdin_size, errno, strerror(errno));
 #else
-        XBT_WARN("Copy %d bytes into %s", static_cast<int>(fdin_size), target_executable.c_str());
+        XBT_VERB("Copy %d bytes into %s", static_cast<int>(fdin_size), target_executable.c_str());
         const int bufsize = 1024 * 1024 * 4;
         char buf[bufsize];
         while (int got = read(fdin, buf, bufsize)) {
@@ -600,7 +606,8 @@ int smpi_main(const char* executable, int argc, char *argv[])
 
         // Load the copy and resolve the entry point:
         void* handle = dlopen(target_executable.c_str(), RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
-        unlink(target_executable.c_str());
+        if (xbt_cfg_get_boolean("smpi/keep-temps") == false)
+          unlink(target_executable.c_str());
         if (handle == nullptr)
           xbt_die("dlopen failed: %s (errno: %d -- %s)", dlerror(), errno, strerror(errno));
         smpi_entry_point_type entry_point = smpi_resolve_function(handle);
@@ -617,7 +624,7 @@ int smpi_main(const char* executable, int argc, char *argv[])
     // Load the dynamic library and resolve the entry point:
     void* handle = dlopen(executable, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
     if (handle == nullptr)
-      xbt_die("dlopen failed for %s", executable);
+      xbt_die("dlopen failed for %s: %s (errno: %d -- %s)", executable, dlerror(), errno, strerror(errno));
     smpi_entry_point_type entry_point = smpi_resolve_function(handle);
     if (!entry_point)
       xbt_die("main not found in %s", executable);