X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cd1ef5df3b8b8acea61715623c25ac3cd12caf33..3e9453209f1da7deb92fe629428e49f3528217bd:/src/kernel/context/Context.cpp

diff --git a/src/kernel/context/Context.cpp b/src/kernel/context/Context.cpp
index 886b2011a7..c4f79b46a4 100644
--- a/src/kernel/context/Context.cpp
+++ b/src/kernel/context/Context.cpp
@@ -1,44 +1,63 @@
-/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2023. 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. */
 
-#include "mc/mc.h"
+#include "src/mc/mc.h"
 
+#include "simgrid/Exception.hpp"
 #include "simgrid/s4u/Host.hpp"
 #include "src/kernel/activity/CommImpl.hpp"
 #include "src/kernel/context/Context.hpp"
-#include "src/simix/smx_private.hpp"
-#include "src/surf/surf_interface.hpp"
+#include "src/sthread/sthread.h"
 
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
+#include <vector>
 
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(ker_context, kernel, "Context switching mechanism");
 
-namespace simgrid {
-namespace kernel {
-namespace context {
+namespace simgrid::kernel::context {
 
-ContextFactoryInitializer factory_initializer = nullptr;
+void Context::set_nthreads(int nb_threads)
+{
+  if (nb_threads <= 0) {
+    nb_threads = std::thread::hardware_concurrency();
+    XBT_INFO("Auto-setting contexts/nthreads to %d", nb_threads);
+  }
+  Context::parallel_contexts = nb_threads;
+}
 
 ContextFactory::~ContextFactory() = default;
 
-static thread_local Context* smx_current_context = nullptr;
+e_xbt_parmap_mode_t Context::parallel_mode = XBT_PARMAP_DEFAULT;
+int Context::parallel_contexts             = 1;
+unsigned Context::stack_size;
+unsigned Context::guard_size;
+thread_local Context* Context::current_context_ = nullptr;
+
+/* Install or disable alternate signal stack, for SIGSEGV handler. */
+int Context::install_sigsegv_stack(bool enable)
+{
+  static std::vector<unsigned char> sigsegv_stack(SIGSTKSZ);
+  stack_t stack;
+  stack.ss_sp    = sigsegv_stack.data();
+  stack.ss_size  = sigsegv_stack.size();
+  stack.ss_flags = enable ? 0 : SS_DISABLE;
+  return sigaltstack(&stack, nullptr);
+}
+
 Context* Context::self()
 {
-  return smx_current_context;
+  return current_context_;
 }
 void Context::set_current(Context* self)
 {
-  smx_current_context = self;
+  current_context_ = self;
 }
 
 void Context::declare_context(std::size_t size)
 {
-#if SIMGRID_HAVE_MC
   /* Store the address of the stack in heap to compare it apart of heap comparison */
-  if(MC_is_active())
-    MC_ignore_heap(this, size);
-#endif
+  MC_ignore_heap(this, size);
 }
 
 Context* ContextFactory::attach(actor::ActorImpl*)
@@ -53,11 +72,11 @@ Context* ContextFactory::create_maestro(std::function<void()>&&, actor::ActorImp
     "Try using --cfg=contexts/factory:thread instead.\n");
 }
 
-Context::Context(std::function<void()>&& code, actor::ActorImpl* actor) : code_(std::move(code)), actor_(actor)
+Context::Context(std::function<void()>&& code, actor::ActorImpl* actor, bool maestro)
+    : code_(std::move(code)), actor_(actor), is_maestro_(maestro)
 {
-  /* If no function was provided, this is the context for maestro
-   * and we should set it as the current context */
-  if (not has_code())
+  /* If we are creating maestro, we should set it as the current context */
+  if (maestro)
     set_current(this);
 }
 
@@ -69,11 +88,10 @@ Context::~Context()
 
 void Context::stop()
 {
-  this->actor_->cleanup();
+  this->actor_->cleanup_from_self();
+  sthread_disable();
+  throw ForcefulKillException(); // clean RAII variables with the dedicated exception
 }
-
 AttachContext::~AttachContext() = default;
 
-} // namespace context
-} // namespace kernel
-} // namespace simgrid
+} // namespace simgrid::kernel::context