-/* Copyright (c) 2015-2017. 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 <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;
-simgrid::xbt::Parmap<smx_actor_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")
-{
- BoostContext::parallel_ = SIMIX_context_is_parallel();
- if (BoostContext::parallel_) {
-#if HAVE_THREAD_CONTEXTS
- int nthreads = SIMIX_context_get_nthreads();
- BoostContext::parmap_ = new simgrid::xbt::Parmap<smx_actor_t>(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_);
-#else
- xbt_die("No thread support for parallel context execution");
-#endif
- }
-}
-
-BoostContextFactory::~BoostContextFactory()
-{
-#if HAVE_THREAD_CONTEXTS
- if (BoostContext::parmap_) {
- delete BoostContext::parmap_;
- BoostContext::parmap_ = nullptr;
- }
- BoostContext::workers_context_.clear();
-#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, smx_actor_t actor)
{
- 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");
-#endif
- else
- context = this->new_context<BoostSerialContext>(std::move(code), cleanup_func, process);
- return context;
-}
-
-void BoostContextFactory::run_all()
-{
-#if HAVE_THREAD_CONTEXTS
- if (BoostContext::parallel_) {
- BoostContext::threads_working_ = 0;
- BoostContext::parmap_->apply(
- [](smx_actor_t process) {
- BoostContext* context = static_cast<BoostContext*>(process->context);
- return context->resume();
- },
- simix_global->process_to_run);
- } else
-#endif
- {
- if (simix_global->process_to_run.empty())
- return;
- smx_actor_t first_process = simix_global->process_to_run.front();
- BoostContext::process_index_ = 1;
- /* execute the first process */
- static_cast<BoostContext*>(first_process->context)->resume();
- }
+ return this->new_context<BoostContext>(std::move(code), actor, this);
}
-
// BoostContext
-void BoostContext::smx_ctx_boost_wrapper(std::intptr_t arg)
-{
- BoostContext* context = reinterpret_cast<BoostContext*>(arg);
- (*context)();
- context->stop();
-}
-
-inline void BoostContext::smx_ctx_boost_jump_fcontext(BoostContext* from, BoostContext* to)
-{
-#if BOOST_VERSION < 105600
- boost::context::jump_fcontext(from->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
-#else
- boost::context::jump_fcontext(&from->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
-#endif
-}
-
-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, smx_actor_t actor, SwappedContextFactory* factory)
+ : SwappedContext(std::move(code), 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:
+ /* 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 - 1;
+ unsigned char* stack = get_stack() + smx_context_usable_stack_size;
#else
- void* stack = this->stack_;
+ unsigned char* stack = get_stack();
#endif
- this->fc_ = boost::context::make_fcontext(
- stack,
- smx_context_usable_stack_size,
- smx_ctx_boost_wrapper);
+#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_);
-}
-
-// BoostSerialContext
-
-void BoostContext::resume()
-{
- SIMIX_context_set_current(this);
- smx_ctx_boost_jump_fcontext(maestro_context_, this);
-}
-
-void BoostSerialContext::suspend()
-{
- /* determine the next context */
- BoostSerialContext* next_context = nullptr;
- 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<BoostSerialContext*>(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_);
- }
- SIMIX_context_set_current(static_cast<smx_context_t>(next_context));
- smx_ctx_boost_jump_fcontext(this, next_context);
-}
-
-void BoostSerialContext::stop()
-{
- BoostContext::stop();
- this->suspend();
}
-// BoostParallelContext
-
-#if HAVE_THREAD_CONTEXTS
-
-void BoostParallelContext::suspend()
+void BoostContext::wrapper(BoostContext::arg_type arg)
{
- boost::optional<smx_actor_t> next_work = parmap_->next();
- BoostParallelContext* next_context;
- if (next_work) {
- XBT_DEBUG("Run next process");
- next_context = static_cast<BoostParallelContext*>(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 = static_cast<BoostParallelContext*>(workers_context_[worker_id]);
+#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)();
+ context->Context::stop();
+ } catch (ForcefulKillException const&) {
+ XBT_DEBUG("Caught a ForcefulKillException");
+ } catch (simgrid::Exception const& e) {
+ XBT_INFO("Actor killed by an uncatched exception %s", simgrid::xbt::demangle(typeid(e).name()).get());
+ throw;
}
-
- SIMIX_context_set_current(static_cast<smx_context_t>(next_context));
- smx_ctx_boost_jump_fcontext(this, next_context);
-}
-
-void BoostParallelContext::stop()
-{
- BoostContext::stop();
- this->suspend();
+ ASAN_ONLY(context->asan_stop_ = true);
+ context->suspend();
}
-void BoostParallelContext::resume()
+void BoostContext::swap_into(SwappedContext* to_)
{
- uintptr_t worker_id = __sync_fetch_and_add(&threads_working_, 1);
- xbt_os_thread_set_specific(worker_id_key_, reinterpret_cast<void*>(worker_id));
-
- BoostParallelContext* worker_context = static_cast<BoostParallelContext*>(SIMIX_context_self());
- workers_context_[worker_id] = worker_context;
-
- SIMIX_context_set_current(this);
- smx_ctx_boost_jump_fcontext(worker_context, this);
-}
-
+ BoostContext* to = static_cast<BoostContext*>(to_);
+#if BOOST_VERSION < 105600
+ boost::context::jump_fcontext(this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
+#elif BOOST_VERSION < 106100
+ boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
+#else
+ 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_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
+}
XBT_PRIVATE ContextFactory* boost_factory()
{
XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
return new BoostContextFactory();
}
-
}}} // namespace