-/* Copyright (c) 2015-2018. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2015-2019. 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. */
#include "ContextBoost.hpp"
#include "context_private.hpp"
+#include "simgrid/Exception.hpp"
#include "src/simix/smx_private.hpp"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
namespace context {
// BoostContextFactory
-
-BoostContextFactory::BoostContextFactory()
- : ContextFactory("BoostContextFactory"), parallel_(SIMIX_context_is_parallel())
-{
- BoostContext::setMaestro(nullptr);
- if (parallel_) {
-#if HAVE_THREAD_CONTEXTS
- ParallelBoostContext::initialize();
-#else
- xbt_die("No thread support for parallel context execution");
-#endif
- }
-}
-
-BoostContextFactory::~BoostContextFactory()
-{
-#if HAVE_THREAD_CONTEXTS
- if (parallel_)
- ParallelBoostContext::finalize();
-#endif
-}
-
smx_context_t BoostContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
smx_actor_t process)
{
-#if HAVE_THREAD_CONTEXTS
- if (parallel_)
- return this->new_context<ParallelBoostContext>(std::move(code), cleanup_func, process);
-#endif
-
- return this->new_context<SerialBoostContext>(std::move(code), cleanup_func, process);
-}
-
-void BoostContextFactory::run_all()
-{
-#if HAVE_THREAD_CONTEXTS
- if (parallel_)
- ParallelBoostContext::run_all();
- else
-#endif
- SerialBoostContext::run_all();
+ return this->new_context<BoostContext>(std::move(code), cleanup_func, process, this);
}
// BoostContext
-BoostContext* BoostContext::maestro_context_ = nullptr;
-
-BoostContext::BoostContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process)
- : Context(std::move(code), cleanup_func, process)
+BoostContext::BoostContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t actor,
+ SwappedContextFactory* factory)
+ : SwappedContext(std::move(code), cleanup_func, actor, factory)
{
/* if the user provided a function for the process then use it, otherwise it is the context for maestro */
if (has_code()) {
- this->stack_ = SIMIX_context_stack_new();
/* We need to pass the bottom of the stack to make_fcontext,
depending on the stack direction it may be the lower or higher address: */
#if PTH_STACKGROWTH == -1
- void* stack = static_cast<char*>(this->stack_) + smx_context_usable_stack_size;
+ void* stack = static_cast<char*>(get_stack()) + smx_context_usable_stack_size;
#else
- void* stack = this->stack_;
+ void* stack = get_stack();
#endif
- ASAN_EVAL(this->asan_stack_ = stack);
+ ASAN_ONLY(this->asan_stack_ = stack);
#if BOOST_VERSION < 106100
this->fc_ = boost::context::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper);
#else
this->fc_ = boost::context::detail::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper);
#endif
+
} else {
#if BOOST_VERSION < 105600
this->fc_ = new boost::context::fcontext_t();
#endif
- if (BoostContext::maestro_context_ == nullptr)
- BoostContext::maestro_context_ = this;
}
}
BoostContext::~BoostContext()
{
#if BOOST_VERSION < 105600
- if (not this->stack_)
+ if (not get_stack())
delete this->fc_;
#endif
- if (this == maestro_context_)
- maestro_context_ = nullptr;
- SIMIX_context_stack_delete(this->stack_);
}
void BoostContext::wrapper(BoostContext::arg_type arg)
BoostContext* context = reinterpret_cast<BoostContext*>(arg);
#else
BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
- ASAN_ASSERT(context->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]);
+ ASAN_ONLY(xbt_assert(context->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
ASAN_FINISH_SWITCH(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_);
static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
#endif
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;
}
- ASAN_EVAL(context->asan_stop_ = true);
+ context->Context::stop();
+ ASAN_ONLY(context->asan_stop_ = true);
context->suspend();
}
-inline void BoostContext::swap(BoostContext* from, BoostContext* to)
+void BoostContext::swap_into(SwappedContext* to_)
{
+ BoostContext* to = static_cast<BoostContext*>(to_);
#if BOOST_VERSION < 105600
- boost::context::jump_fcontext(from->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
+ boost::context::jump_fcontext(this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
#elif BOOST_VERSION < 106100
- boost::context::jump_fcontext(&from->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
+ boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
#else
- BoostContext* ctx[2] = {from, to};
- void* fake_stack = nullptr;
- ASAN_EVAL(to->asan_ctx_ = from);
- ASAN_START_SWITCH(from->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
+ BoostContext* ctx[2] = {this, to};
+ ASAN_ONLY(void* fake_stack = nullptr);
+ ASAN_ONLY(to->asan_ctx_ = this);
+ ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
- ASAN_ASSERT(from->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]);
- ASAN_FINISH_SWITCH(fake_stack, &from->asan_ctx_->asan_stack_, &from->asan_ctx_->asan_stack_size_);
+ ASAN_ONLY(xbt_assert(this->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
+ ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_);
static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
#endif
}
-void BoostContext::stop()
-{
- Context::stop();
- throw StopRequest();
-}
-
-// SerialBoostContext
-
-unsigned long SerialBoostContext::process_index_;
-
-void SerialBoostContext::suspend()
-{
- /* determine the next context */
- SerialBoostContext* 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<SerialBoostContext*>(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<SerialBoostContext*>(BoostContext::getMaestro());
- }
- SIMIX_context_set_current(next_context);
- BoostContext::swap(this, next_context);
-}
-
-void SerialBoostContext::resume()
-{
- SIMIX_context_set_current(this);
- BoostContext::swap(BoostContext::getMaestro(), this);
-}
-
-void SerialBoostContext::run_all()
-{
- if (simix_global->process_to_run.empty())
- return;
- smx_actor_t first_process = simix_global->process_to_run.front();
- process_index_ = 1;
- /* execute the first process */
- static_cast<SerialBoostContext*>(first_process->context)->resume();
-}
-
-// ParallelBoostContext
-
-#if HAVE_THREAD_CONTEXTS
-
-simgrid::xbt::Parmap<smx_actor_t>* ParallelBoostContext::parmap_;
-std::atomic<uintptr_t> ParallelBoostContext::threads_working_;
-xbt_os_thread_key_t ParallelBoostContext::worker_id_key_;
-std::vector<ParallelBoostContext*> ParallelBoostContext::workers_context_;
-
-void ParallelBoostContext::initialize()
-{
- parmap_ = nullptr;
- workers_context_.clear();
- workers_context_.resize(SIMIX_context_get_nthreads(), nullptr);
- xbt_os_thread_key_create(&worker_id_key_);
-}
-
-void ParallelBoostContext::finalize()
-{
- delete parmap_;
- parmap_ = nullptr;
- workers_context_.clear();
- xbt_os_thread_key_destroy(worker_id_key_);
-}
-
-void ParallelBoostContext::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) {
- ParallelBoostContext* context = static_cast<ParallelBoostContext*>(process->context);
- context->resume();
- },
- simix_global->process_to_run);
-}
-
-void ParallelBoostContext::suspend()
-{
- boost::optional<smx_actor_t> next_work = parmap_->next();
- ParallelBoostContext* next_context;
- if (next_work) {
- XBT_DEBUG("Run next process");
- next_context = static_cast<ParallelBoostContext*>(next_work.get()->context);
- } else {
- XBT_DEBUG("No more processes to run");
- uintptr_t worker_id = reinterpret_cast<uintptr_t>(xbt_os_thread_get_specific(worker_id_key_));
- next_context = workers_context_[worker_id];
- }
-
- SIMIX_context_set_current(next_context);
- BoostContext::swap(this, next_context);
-}
-
-void ParallelBoostContext::resume()
-{
- uintptr_t worker_id = threads_working_.fetch_add(1, std::memory_order_relaxed);
- xbt_os_thread_set_specific(worker_id_key_, reinterpret_cast<void*>(worker_id));
-
- ParallelBoostContext* worker_context = static_cast<ParallelBoostContext*>(SIMIX_context_self());
- workers_context_[worker_id] = worker_context;
-
- SIMIX_context_set_current(this);
- BoostContext::swap(worker_context, this);
-}
-
-#endif
-
XBT_PRIVATE ContextFactory* boost_factory()
{
XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
