-/* Copyright (c) 2009-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2009-2019. 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. */
// RawContextFactory
-RawContextFactory::RawContextFactory() : ContextFactory("RawContextFactory"), parallel_(SIMIX_context_is_parallel())
-{
- RawContext::set_maestro(nullptr);
- if (parallel_) {
- // TODO: choose dynamically when SIMIX_context_get_parallel_threshold() > 1
- ParallelRawContext::initialize();
- }
-}
-
-RawContextFactory::~RawContextFactory()
-{
- if (parallel_)
- ParallelRawContext::finalize();
-}
-
Context* RawContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
smx_actor_t process)
{
- if (parallel_)
- return this->new_context<ParallelRawContext>(std::move(code), cleanup_func, process);
- return this->new_context<SerialRawContext>(std::move(code), cleanup_func, process);
-}
-
-void RawContextFactory::run_all()
-{
- if (parallel_)
- ParallelRawContext::run_all();
- else
- SerialRawContext::run_all();
+ return this->new_context<RawContext>(std::move(code), cleanup_func, process, this);
}
// RawContext
-RawContext* RawContext::maestro_context_ = nullptr;
-
-RawContext::RawContext(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t process)
- : Context(std::move(code), cleanup, process)
+RawContext::RawContext(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t actor,
+ SwappedContextFactory* factory)
+ : SwappedContext(std::move(code), cleanup, actor, factory)
{
if (has_code()) {
- this->stack_ = SIMIX_context_stack_new();
-#if PTH_STACKGROWTH == -1
- ASAN_ONLY(this->asan_stack_ = static_cast<char*>(this->stack_) + smx_context_usable_stack_size);
-#else
- ASAN_ONLY(this->asan_stack_ = this->stack_);
-#endif
- this->stack_top_ = raw_makecontext(this->stack_, smx_context_usable_stack_size, RawContext::wrapper, this);
+ this->stack_top_ = raw_makecontext(get_stack(), smx_context_usable_stack_size, RawContext::wrapper, this);
} else {
- if (process != nullptr && maestro_context_ == nullptr)
- maestro_context_ = this;
if (MC_is_active())
- MC_ignore_heap(&maestro_context_->stack_top_, sizeof(maestro_context_->stack_top_));
+ MC_ignore_heap(&stack_top_, sizeof(stack_top_));
}
}
-RawContext::~RawContext()
-{
- SIMIX_context_stack_delete(this->stack_);
-}
-
void RawContext::wrapper(void* arg)
{
RawContext* context = static_cast<RawContext*>(arg);
ASAN_FINISH_SWITCH(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_);
try {
(*context)();
+ context->Context::stop();
} catch (StopRequest const&) {
XBT_DEBUG("Caught a StopRequest");
} catch (simgrid::Exception const& e) {
XBT_INFO("Actor killed by an uncatched exception %s", simgrid::xbt::demangle(typeid(e).name()).get());
throw;
}
- context->Context::stop();
-
ASAN_ONLY(context->asan_stop_ = true);
context->suspend();
}
-inline void RawContext::swap(RawContext* from, RawContext* to)
+void RawContext::swap_into(SwappedContext* to_)
{
+ RawContext* to = static_cast<RawContext*>(to_);
ASAN_ONLY(void* fake_stack = nullptr);
- ASAN_ONLY(to->asan_ctx_ = from);
- ASAN_START_SWITCH(from->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
- raw_swapcontext(&from->stack_top_, to->stack_top_);
- ASAN_FINISH_SWITCH(fake_stack, &from->asan_ctx_->asan_stack_, &from->asan_ctx_->asan_stack_size_);
-}
-
-void RawContext::stop()
-{
- Context::stop();
- throw StopRequest();
-}
-
-// SerialRawContext
-
-unsigned long SerialRawContext::process_index_; /* index of the next process to run in the list of runnable processes */
-
-void SerialRawContext::suspend()
-{
- /* determine the next context */
- SerialRawContext* next_context;
- unsigned long int i = process_index_;
- process_index_++;
- if (i < simix_global->process_to_run.size()) {
- /* execute the next process */
- XBT_DEBUG("Run next process");
- next_context = static_cast<SerialRawContext*>(simix_global->process_to_run[i]->context_);
- } else {
- /* all processes were run, return to maestro */
- XBT_DEBUG("No more process to run");
- next_context = static_cast<SerialRawContext*>(RawContext::get_maestro());
- }
- Context::set_current(next_context);
- RawContext::swap(this, next_context);
-}
-
-void SerialRawContext::resume()
-{
- Context::set_current(this);
- RawContext::swap(RawContext::get_maestro(), this);
-}
-
-void SerialRawContext::run_all()
-{
- if (simix_global->process_to_run.empty())
- return;
- smx_actor_t first_process = simix_global->process_to_run.front();
- process_index_ = 1;
- static_cast<SerialRawContext*>(first_process->context_)->resume();
-}
-
-// ParallelRawContext
-
-simgrid::xbt::Parmap<smx_actor_t>* ParallelRawContext::parmap_;
-std::atomic<uintptr_t> ParallelRawContext::threads_working_; /* number of threads that have started their work */
-uintptr_t thread_local ParallelRawContext::worker_id_; /* thread-specific storage for the thread id */
-std::vector<ParallelRawContext*> ParallelRawContext::workers_context_; /* space to save the worker context
- in each thread */
-
-void ParallelRawContext::initialize()
-{
- parmap_ = nullptr;
- workers_context_.clear();
- workers_context_.resize(SIMIX_context_get_nthreads(), nullptr);
-}
-
-void ParallelRawContext::finalize()
-{
- delete parmap_;
- parmap_ = nullptr;
- workers_context_.clear();
-}
-
-void ParallelRawContext::run_all()
-{
- threads_working_ = 0;
- if (parmap_ == nullptr)
- parmap_ = new simgrid::xbt::Parmap<smx_actor_t>(SIMIX_context_get_nthreads(), SIMIX_context_get_parallel_mode());
- parmap_->apply(
- [](smx_actor_t process) {
- ParallelRawContext* context = static_cast<ParallelRawContext*>(process->context_);
- context->resume();
- },
- simix_global->process_to_run);
-}
-
-void ParallelRawContext::suspend()
-{
- /* determine the next context */
- boost::optional<smx_actor_t> next_work = parmap_->next();
- ParallelRawContext* next_context;
- if (next_work) {
- /* there is a next process to resume */
- XBT_DEBUG("Run next process");
- next_context = static_cast<ParallelRawContext*>(next_work.get()->context_);
- } else {
- /* all processes were run, go to the barrier */
- XBT_DEBUG("No more processes to run");
- next_context = workers_context_[worker_id_];
- XBT_DEBUG("Restoring worker stack %zu (working threads = %zu)", worker_id_, threads_working_.load());
- }
-
- Context::set_current(next_context);
- RawContext::swap(this, next_context);
-}
-
-void ParallelRawContext::resume()
-{
- worker_id_ = threads_working_.fetch_add(1, std::memory_order_relaxed);
- ParallelRawContext* worker_context = static_cast<ParallelRawContext*>(self());
- workers_context_[worker_id_] = worker_context;
- XBT_DEBUG("Saving worker stack %zu", worker_id_);
- Context::set_current(this);
- RawContext::swap(worker_context, this);
+ ASAN_ONLY(to->asan_ctx_ = this);
+ ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
+ raw_swapcontext(&this->stack_top_, to->stack_top_);
+ ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_);
}
ContextFactory* raw_factory()
