/* a fast and simple context switching library */
-/* Copyright (c) 2009-2015. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2009-2017. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
xbt_os_thread_key_create(&smx_current_context_key);
#endif
+#if defined(__APPLE__) || defined(__NetBSD__)
+ if (context_factory_name == std::string("thread") &&
+ strcmp(xbt_cfg_get_string("smpi/privatization"), "dlopen") == 0) {
+ XBT_WARN("dlopen+thread broken on Apple and BSD. Switching to raw contexts.");
+ context_factory_name = "raw";
+ }
+#endif
+#if defined(__FreeBSD__)
+ if (context_factory_name == std::string("thread") && strcmp(xbt_cfg_get_string("smpi/privatization"), "no") != 0) {
+ XBT_WARN("mmap broken on FreeBSD, but dlopen+thread broken too. Switching to dlopen+raw contexts.");
+ context_factory_name = "raw";
+ }
+#endif
+
/* select the context factory to use to create the contexts */
if (simgrid::kernel::context::factory_initializer) { // Give Java a chance to hijack the factory mechanism
simix_global->context_factory = simgrid::kernel::context::factory_initializer();
#endif
size_t size = smx_context_stack_size + smx_context_guard_size;
-#if HAVE_MC
- /* Cannot use posix_memalign when HAVE_MC. Align stack by hand, and save the
+#if SIMGRID_HAVE_MC
+ /* Cannot use posix_memalign when SIMGRID_HAVE_MC. Align stack by hand, and save the
* pointer returned by xbt_malloc0. */
char *alloc = (char*)xbt_malloc0(size + xbt_pagesize);
stack = alloc - ((uintptr_t)alloc & (xbt_pagesize - 1)) + xbt_pagesize;
#ifndef _WIN32
if (mprotect(stack, smx_context_guard_size, PROT_NONE) == -1) {
- xbt_die("Failed to protect stack: %s", strerror(errno));
- /* This is fatal. We are going to fail at some point when
- we tryi reusing this. */
+ xbt_die(
+ "Failed to protect stack: %s.\n"
+ "If you are running a lot of actors, you may be exceeding the amount of mappings allowed per process.\n"
+ "On Linux systems, change this value with sudo sysctl -w vm.max_map_count=newvalue (default value: 65536)\n"
+ "Please see http://simgrid.gforge.inria.fr/simgrid/latest/doc/html/options.html#options_virt for more info.",
+ strerror(errno));
+ /* This is fatal. We are going to fail at some point when we try reusing this. */
}
#endif
stack = (char *)stack + smx_context_guard_size;
XBT_WARN("Failed to remove page protection: %s", strerror(errno));
/* try to pursue anyway */
}
-#if HAVE_MC
+#if SIMGRID_HAVE_MC
/* Retrieve the saved pointer. See SIMIX_context_stack_new above. */
stack = *((void **)stack - 1);
#endif