-/* Copyright (c) 2015. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2015-2018. 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 <cstdint>
-
-#include <functional>
-#include <utility>
-#include <vector>
-
-#include <boost/context/all.hpp>
-
-#include <xbt/log.h>
-#include <xbt/xbt_os_thread.h>
-
-#include "src/simix/smx_private.h"
-#include "src/internal_config.h"
-#include "src/kernel/context/ContextBoost.hpp"
+#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 kernel {
namespace context {
-class BoostSerialContext : public BoostContext {
-public:
- BoostSerialContext(std::function<void()> code,
- void_pfn_smxprocess_t cleanup_func,
- smx_actor_t process)
- : BoostContext(std::move(code), cleanup_func, process) {}
- void stop() override;
- void suspend() override;
-};
-
-#if HAVE_THREAD_CONTEXTS
-class BoostParallelContext : public BoostContext {
-public:
- BoostParallelContext(std::function<void()> code,
- void_pfn_smxprocess_t cleanup_func,
- smx_actor_t process)
- : BoostContext(std::move(code), cleanup_func, process) {}
- void stop() override;
- void suspend() override;
- void resume() override;
-};
-#endif
-
// BoostContextFactory
-bool BoostContext::parallel_ = false;
-xbt_parmap_t BoostContext::parmap_ = nullptr;
-uintptr_t BoostContext::threads_working_ = 0;
-xbt_os_thread_key_t BoostContext::worker_id_key_;
-unsigned long BoostContext::process_index_ = 0;
-BoostContext* BoostContext::maestro_context_ = nullptr;
-std::vector<BoostContext*> BoostContext::workers_context_;
-
BoostContextFactory::BoostContextFactory()
- : ContextFactory("BoostContextFactory")
+ : ContextFactory("BoostContextFactory"), parallel_(SIMIX_context_is_parallel())
{
- BoostContext::parallel_ = SIMIX_context_is_parallel();
- if (BoostContext::parallel_) {
-#if !HAVE_THREAD_CONTEXTS
- xbt_die("No thread support for parallel context execution");
+ BoostContext::setMaestro(nullptr);
+ if (parallel_) {
+#if HAVE_THREAD_CONTEXTS
+ ParallelBoostContext::initialize();
#else
- int nthreads = SIMIX_context_get_nthreads();
- BoostContext::parmap_ = xbt_parmap_new(nthreads, SIMIX_context_get_parallel_mode());
- BoostContext::workers_context_.clear();
- BoostContext::workers_context_.resize(nthreads, nullptr);
- BoostContext::maestro_context_ = nullptr;
- xbt_os_thread_key_create(&BoostContext::worker_id_key_);
+ xbt_die("No thread support for parallel context execution");
#endif
}
}
BoostContextFactory::~BoostContextFactory()
{
#if HAVE_THREAD_CONTEXTS
- if (BoostContext::parmap_) {
- xbt_parmap_destroy(BoostContext::parmap_);
- BoostContext::parmap_ = nullptr;
- }
- BoostContext::workers_context_.clear();
+ 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)
+smx_context_t BoostContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
+ smx_actor_t process)
{
- BoostContext* context = nullptr;
- if (BoostContext::parallel_)
#if HAVE_THREAD_CONTEXTS
- context = this->new_context<BoostParallelContext>(
- std::move(code), cleanup_func, process);
-#else
- xbt_die("No support for parallel execution");
+ if (parallel_)
+ return this->new_context<ParallelBoostContext>(std::move(code), cleanup_func, process);
#endif
- else
- context = this->new_context<BoostSerialContext>(
- std::move(code), cleanup_func, process);
- return context;
+
+ return this->new_context<SerialBoostContext>(std::move(code), cleanup_func, process);
}
void BoostContextFactory::run_all()
{
#if HAVE_THREAD_CONTEXTS
- if (BoostContext::parallel_) {
- BoostContext::threads_working_ = 0;
- xbt_parmap_apply(BoostContext::parmap_,
- [](void* arg) {
- smx_actor_t process = static_cast<smx_actor_t>(arg);
- BoostContext* context = static_cast<BoostContext*>(process->context);
- return context->resume();
- },
- simix_global->process_to_run);
- } else
+ if (parallel_)
+ ParallelBoostContext::run_all();
+ else
#endif
- {
- if (xbt_dynar_is_empty(simix_global->process_to_run))
- return;
- smx_actor_t first_process =
- xbt_dynar_get_as(simix_global->process_to_run, 0, smx_actor_t);
- BoostContext::process_index_ = 1;
- /* execute the first process */
- static_cast<BoostContext*>(first_process->context)->resume();
- }
+ SerialBoostContext::run_all();
}
-
// BoostContext
-static void smx_ctx_boost_wrapper(std::intptr_t arg)
-{
- BoostContext* context = (BoostContext*) arg;
- (*context)();
- context->stop();
-}
+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 process)
+ : Context(std::move(code), cleanup_func, process)
{
- /* if the user provided a function for the process then use it,
- otherwise it is the context for maestro */
+ /* 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 = (char*) this->stack_ + smx_context_usable_stack_size - 1;
- #else
+ /* 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;
+#else
void* stack = this->stack_;
- #endif
- this->fc_ = boost::context::make_fcontext(
- stack,
- smx_context_usable_stack_size,
- smx_ctx_boost_wrapper);
+#endif
+ 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 HAVE_BOOST_CONTEXTS == 1
+#if BOOST_VERSION < 105600
this->fc_ = new boost::context::fcontext_t();
- #endif
+#endif
if (BoostContext::maestro_context_ == nullptr)
BoostContext::maestro_context_ = this;
}
BoostContext::~BoostContext()
{
-#if HAVE_BOOST_CONTEXTS == 1
- if (!this->stack_)
+#if BOOST_VERSION < 105600
+ if (not this->stack_)
delete this->fc_;
#endif
if (this == maestro_context_)
SIMIX_context_stack_delete(this->stack_);
}
-// BoostSerialContext
+void BoostContext::wrapper(BoostContext::arg_type arg)
+{
+#if BOOST_VERSION < 106100
+ BoostContext* context = reinterpret_cast<BoostContext*>(arg);
+#else
+ BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
+ 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)();
+ } 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();
+}
-void BoostContext::resume()
+inline void BoostContext::swap(BoostContext* from, BoostContext* to)
{
- SIMIX_context_set_current(this);
-#if HAVE_BOOST_CONTEXTS == 1
- boost::context::jump_fcontext(
- maestro_context_->fc_, this->fc_,
- (intptr_t) this);
+#if BOOST_VERSION < 105600
+ boost::context::jump_fcontext(from->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));
#else
- boost::context::jump_fcontext(
- &maestro_context_->fc_, this->fc_,
- (intptr_t) this);
+ BoostContext* ctx[2] = {from, 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_);
+ boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
+ ASAN_ONLY(xbt_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_);
+ static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
#endif
}
-void BoostSerialContext::suspend()
+void BoostContext::stop()
+{
+ Context::stop();
+ throw StopRequest();
+}
+
+// SerialBoostContext
+
+unsigned long SerialBoostContext::process_index_;
+
+void SerialBoostContext::suspend()
{
/* determine the next context */
- BoostSerialContext* next_context = nullptr;
- unsigned long int i = process_index_++;
+ SerialBoostContext* next_context;
+ unsigned long int i = process_index_;
+ process_index_++;
- if (i < xbt_dynar_length(simix_global->process_to_run)) {
+ if (i < simix_global->process_to_run.size()) {
/* execute the next process */
XBT_DEBUG("Run next process");
- next_context = static_cast<BoostSerialContext*>(xbt_dynar_get_as(
- simix_global->process_to_run, i, smx_actor_t)->context);
- }
- else {
+ 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<BoostSerialContext*>(
- maestro_context_);
+ next_context = static_cast<SerialBoostContext*>(BoostContext::getMaestro());
}
- SIMIX_context_set_current((smx_context_t) next_context);
- #if HAVE_BOOST_CONTEXTS == 1
- boost::context::jump_fcontext(
- this->fc_, next_context->fc_, (intptr_t) next_context);
- #else
- boost::context::jump_fcontext(
- &this->fc_, next_context->fc_, (intptr_t) next_context);
- #endif
+ SIMIX_context_set_current(next_context);
+ BoostContext::swap(this, next_context);
}
-void BoostSerialContext::stop()
+void SerialBoostContext::resume()
{
- BoostContext::stop();
- this->suspend();
+ SIMIX_context_set_current(this);
+ BoostContext::swap(BoostContext::getMaestro(), this);
}
-// BoostParallelContext
+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
-void BoostParallelContext::suspend()
+simgrid::xbt::Parmap<smx_actor_t>* ParallelBoostContext::parmap_;
+std::atomic<uintptr_t> ParallelBoostContext::threads_working_;
+thread_local uintptr_t ParallelBoostContext::worker_id_;
+std::vector<ParallelBoostContext*> ParallelBoostContext::workers_context_;
+
+void ParallelBoostContext::initialize()
{
- smx_actor_t next_work = (smx_actor_t) xbt_parmap_next(parmap_);
- BoostParallelContext* next_context = nullptr;
+ parmap_ = nullptr;
+ workers_context_.clear();
+ workers_context_.resize(SIMIX_context_get_nthreads(), nullptr);
+}
- if (next_work != nullptr) {
- XBT_DEBUG("Run next process");
- next_context = static_cast<BoostParallelContext*>(next_work->context);
- }
- else {
- XBT_DEBUG("No more processes to run");
- uintptr_t worker_id =
- (uintptr_t) xbt_os_thread_get_specific(worker_id_key_);
- next_context = static_cast<BoostParallelContext*>(
- workers_context_[worker_id]);
- }
+void ParallelBoostContext::finalize()
+{
+ delete parmap_;
+ parmap_ = nullptr;
+ workers_context_.clear();
+}
- SIMIX_context_set_current((smx_context_t) next_context);
-#if HAVE_BOOST_CONTEXTS == 1
- boost::context::jump_fcontext(
- this->fc_, next_context->fc_, (intptr_t)next_context);
-#else
- boost::context::jump_fcontext(
- &this->fc_, next_context->fc_, (intptr_t)next_context);
-#endif
+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 BoostParallelContext::stop()
+void ParallelBoostContext::suspend()
{
- BoostContext::stop();
- this->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");
+ next_context = workers_context_[worker_id_];
+ }
+
+ SIMIX_context_set_current(next_context);
+ BoostContext::swap(this, next_context);
}
-void BoostParallelContext::resume()
+void ParallelBoostContext::resume()
{
- uintptr_t worker_id = __sync_fetch_and_add(&threads_working_, 1);
- xbt_os_thread_set_specific(worker_id_key_, (void*) worker_id);
+ worker_id_ = threads_working_.fetch_add(1, std::memory_order_relaxed);
- BoostParallelContext* worker_context =
- static_cast<BoostParallelContext*>(SIMIX_context_self());
- workers_context_[worker_id] = worker_context;
+ ParallelBoostContext* worker_context = static_cast<ParallelBoostContext*>(SIMIX_context_self());
+ workers_context_[worker_id_] = worker_context;
SIMIX_context_set_current(this);
-#if HAVE_BOOST_CONTEXTS == 1
- boost::context::jump_fcontext(
- worker_context->fc_, this->fc_, (intptr_t) this);
-#else
- boost::context::jump_fcontext(
- &worker_context->fc_, this->fc_, (intptr_t) this);
-#endif
+ BoostContext::swap(worker_context, this);
}
#endif
XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
return new BoostContextFactory();
}
-
}}} // namespace