-/* 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 smx_context_t smx_current_context = nullptr;
-Context* Context::self()
+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)
{
- return smx_current_context;
+ 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);
}
-void Context::set_current(Context* self)
+
+Context* Context::self()
{
- smx_current_context = self;
+ return current_context_;
}
-
-void Context::declare_context(std::size_t size)
+void Context::set_current(Context* self)
{
-#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
+ current_context_ = self;
}
-Context* ContextFactory::attach(smx_actor_t)
+Context* ContextFactory::attach(actor::ActorImpl*)
{
xbt_die("Cannot attach with this ContextFactory.\n"
"Try using --cfg=contexts/factory:thread instead.\n");
}
-Context* ContextFactory::create_maestro(std::function<void()>, smx_actor_t)
+Context* ContextFactory::create_maestro(std::function<void()>&&, actor::ActorImpl*)
{
xbt_die("Cannot create_maestro with this ContextFactory.\n"
"Try using --cfg=contexts/factory:thread instead.\n");
}
-Context::Context(std::function<void()> code, smx_actor_t 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);
}
void Context::stop()
{
- actor_->finished_ = true;
-
- if (actor_->has_to_auto_restart() && not actor_->get_host()->is_on()) {
- XBT_DEBUG("Insert host %s to watched_hosts because it's off and %s needs to restart",
- actor_->get_host()->get_cname(), actor_->get_cname());
- watched_hosts.insert(actor_->get_host()->get_name());
- }
-
- // Execute the termination callbacks
- smx_process_exit_status_t exit_status = (actor_->context_->iwannadie) ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS;
- while (not actor_->on_exit.empty()) {
- s_smx_process_exit_fun_t exit_fun = actor_->on_exit.back();
- actor_->on_exit.pop_back();
- (exit_fun.fun)(exit_status, exit_fun.arg);
- }
-
- /* cancel non-blocking activities */
- for (auto activity : actor_->comms)
- boost::static_pointer_cast<activity::CommImpl>(activity)->cancel();
- actor_->comms.clear();
-
- XBT_DEBUG("%s@%s(%ld) should not run anymore", actor_->get_cname(), actor_->iface()->get_host()->get_cname(),
- actor_->get_pid());
-
- this->actor_->cleanup();
-
- this->iwannadie = false; // don't let the simcall's yield() do a Context::stop(), because that's me
- simgrid::simix::simcall([this] {
- simgrid::s4u::Actor::on_destruction(actor_->iface());
-
- /* Unregister from the kill timer if any */
- if (actor_->kill_timer != nullptr) {
- actor_->kill_timer->remove();
- actor_->kill_timer = nullptr;
- }
-
- actor_->cleanup();
- });
- this->iwannadie = true;
+ this->actor_->cleanup_from_self();
+ sthread_disable();
+ throw ForcefulKillException(); // clean RAII variables with the dedicated exception
}
-
AttachContext::~AttachContext() = default;
-}}}
-
-/** @brief Executes all the processes to run (in parallel if possible). */
-void SIMIX_context_runall()
-{
- simix_global->context_factory->run_all();
-}
+} // namespace simgrid::kernel::context
