-/* Copyright (c) 2015-2017. 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 "ContextBoost.hpp"
-
-#include <utility>
-#include <xbt/log.h>
-
-#if HAVE_SANITIZE_ADDRESS_FIBER_SUPPORT
-#include <sanitizer/asan_interface.h>
-#define ASAN_EVAL(expr) (expr)
-#define ASAN_START_SWITCH(fake_stack_save, bottom, size) __sanitizer_start_switch_fiber(fake_stack_save, bottom, size)
-#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) \
- __sanitizer_finish_switch_fiber(fake_stack_save, bottom_old, size_old)
-#else
-#define ASAN_EVAL(expr) (void)0
-#define ASAN_START_SWITCH(fake_stack_save, bottom, size) (void)0
-#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) (void)(fake_stack_save)
-#endif
+#include "context_private.hpp"
+#include "src/simix/smx_private.hpp"
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
BoostContext::setMaestro(nullptr);
if (parallel_) {
#if HAVE_THREAD_CONTEXTS
- ParallelBoostContext::parmap_ = nullptr;
- ParallelBoostContext::workers_context_.clear();
- ParallelBoostContext::workers_context_.resize(SIMIX_context_get_nthreads(), nullptr);
- xbt_os_thread_key_create(&ParallelBoostContext::worker_id_key_);
+ ParallelBoostContext::initialize();
#else
xbt_die("No thread support for parallel context execution");
#endif
BoostContextFactory::~BoostContextFactory()
{
#if HAVE_THREAD_CONTEXTS
- delete ParallelBoostContext::parmap_;
- ParallelBoostContext::parmap_ = nullptr;
- ParallelBoostContext::workers_context_.clear();
+ if (parallel_)
+ ParallelBoostContext::finalize();
#endif
}
void BoostContextFactory::run_all()
{
#if HAVE_THREAD_CONTEXTS
- if (parallel_) {
- ParallelBoostContext::threads_working_ = 0;
- if (not ParallelBoostContext::parmap_)
- ParallelBoostContext::parmap_ =
- new simgrid::xbt::Parmap<smx_actor_t>(SIMIX_context_get_nthreads(), SIMIX_context_get_parallel_mode());
- ParallelBoostContext::parmap_->apply(
- [](smx_actor_t process) {
- BoostContext* context = static_cast<BoostContext*>(process->context);
- return context->resume();
- },
- simix_global->process_to_run);
- return;
- }
+ if (parallel_)
+ ParallelBoostContext::run_all();
+ else
#endif
-
- if (simix_global->process_to_run.empty())
- return;
- smx_actor_t first_process = simix_global->process_to_run.front();
- SerialBoostContext::process_index_ = 1;
- /* execute the first process */
- static_cast<BoostContext*>(first_process->context)->resume();
+ SerialBoostContext::run_all();
}
-
// BoostContext
BoostContext* BoostContext::maestro_context_ = nullptr;
#else
void* stack = this->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
#if BOOST_VERSION < 106100
BoostContext* context = reinterpret_cast<BoostContext*>(arg);
#else
- ASAN_FINISH_SWITCH(nullptr, &static_cast<BoostContext**>(arg.data)[0]->asan_stack_,
- &static_cast<BoostContext**>(arg.data)[0]->asan_stack_size_);
+ 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;
- BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
#endif
try {
(*context)();
} catch (StopRequest const&) {
XBT_DEBUG("Caught a StopRequest");
}
- ASAN_EVAL(context->asan_stop_ = true);
+ ASAN_ONLY(context->asan_stop_ = true);
context->suspend();
}
boost::context::jump_fcontext(&from->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
#else
BoostContext* ctx[2] = {from, to};
- void* fake_stack;
+ 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_FINISH_SWITCH(fake_stack, &static_cast<BoostContext**>(arg.data)[0]->asan_stack_,
- &static_cast<BoostContext**>(arg.data)[0]->asan_stack_size_);
+ 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
}
XBT_DEBUG("No more process to run");
next_context = static_cast<SerialBoostContext*>(BoostContext::getMaestro());
}
- SIMIX_context_set_current(static_cast<smx_context_t>(next_context));
+ SIMIX_context_set_current(next_context);
BoostContext::swap(this, next_context);
}
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_ = nullptr;
-uintptr_t ParallelBoostContext::threads_working_ = 0;
+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<BoostContext*> ParallelBoostContext::workers_context_;
+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()
{
} 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<ParallelBoostContext*>(workers_context_[worker_id]);
+ next_context = workers_context_[worker_id];
}
- SIMIX_context_set_current(static_cast<smx_context_t>(next_context));
+ SIMIX_context_set_current(next_context);
BoostContext::swap(this, next_context);
}
void ParallelBoostContext::resume()
{
- uintptr_t worker_id = __sync_fetch_and_add(&threads_working_, 1);
+ 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;
+ workers_context_[worker_id] = worker_context;
SIMIX_context_set_current(this);
BoostContext::swap(worker_context, this);
