-/* 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")
+smx_context_t BoostContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
+ smx_actor_t process)
{
- BoostContext::parallel_ = SIMIX_context_is_parallel();
- if (BoostContext::parallel_) {
-#if !HAVE_THREAD_CONTEXTS
- xbt_die("No thread support for parallel context execution");
-#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_);
-#endif
- }
-}
-
-BoostContextFactory::~BoostContextFactory()
-{
-#if HAVE_THREAD_CONTEXTS
- if (BoostContext::parmap_) {
- xbt_parmap_destroy(BoostContext::parmap_);
- BoostContext::parmap_ = nullptr;
- }
- BoostContext::workers_context_.clear();
-#endif
+ return this->new_context<BoostContext>(std::move(code), cleanup_func, process, this);
}
-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");
-#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;
- 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
-#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();
- }
-}
-
-
// BoostContext
-static void smx_ctx_boost_wrapper(std::intptr_t arg)
-{
- BoostContext* context = (BoostContext*) arg;
- (*context)();
- context->stop();
-}
-
-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,
+ SwappedContextFactory* factory)
+ : SwappedContext(std::move(code), cleanup_func, process, factory)
{
- /* 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
+ set_maestro(this); // save maestro for run_all()
+#if BOOST_VERSION < 105600
this->fc_ = new boost::context::fcontext_t();
- #endif
- if (BoostContext::maestro_context_ == nullptr)
- BoostContext::maestro_context_ = this;
+#endif
}
}
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_)
- maestro_context_ = nullptr;
- SIMIX_context_stack_delete(this->stack_);
}
-// BoostSerialContext
-
-void BoostContext::resume()
+void BoostContext::wrapper(BoostContext::arg_type arg)
{
- 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 < 106100
+ BoostContext* context = reinterpret_cast<BoostContext*>(arg);
#else
- boost::context::jump_fcontext(
- &maestro_context_->fc_, this->fc_,
- (intptr_t) this);
+ 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
-}
-
-void BoostSerialContext::suspend()
-{
- /* determine the next context */
- BoostSerialContext* next_context = nullptr;
- unsigned long int i = process_index_++;
-
- if (i < xbt_dynar_length(simix_global->process_to_run)) {
- /* 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 {
- /* 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((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 BoostSerialContext::stop()
-{
- BoostContext::stop();
- this->suspend();
-}
-
-// BoostParallelContext
-
-#if HAVE_THREAD_CONTEXTS
-
-void BoostParallelContext::suspend()
-{
- smx_actor_t next_work = (smx_actor_t) xbt_parmap_next(parmap_);
- BoostParallelContext* next_context = nullptr;
-
- if (next_work != nullptr) {
- XBT_DEBUG("Run next process");
- next_context = static_cast<BoostParallelContext*>(next_work->context);
+ 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;
}
- 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]);
- }
-
- 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
+ context->Context::stop();
+ ASAN_ONLY(context->asan_stop_ = true);
+ context->suspend();
}
-void BoostParallelContext::stop()
+void BoostContext::swap_into(SwappedContext* to_)
{
- BoostContext::stop();
- this->suspend();
-}
-
-void BoostParallelContext::resume()
-{
- uintptr_t worker_id = __sync_fetch_and_add(&threads_working_, 1);
- xbt_os_thread_set_specific(worker_id_key_, (void*) worker_id);
-
- BoostParallelContext* worker_context =
- static_cast<BoostParallelContext*>(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);
+ 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
- boost::context::jump_fcontext(
- &worker_context->fc_, this->fc_, (intptr_t) this);
+ BoostContext* ctx[2] = {this, 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
}
-#endif
-
XBT_PRIVATE ContextFactory* boost_factory()
{
XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
return new BoostContextFactory();
}
-
}}} // namespace
