1 /* Copyright (c) 2015-2020. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "ContextBoost.hpp"
7 #include "context_private.hpp"
8 #include "simgrid/Exception.hpp"
9 #include "src/simix/smx_private.hpp"
11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
17 // BoostContextFactory
18 BoostContext* BoostContextFactory::create_context(std::function<void()>&& code, actor::ActorImpl* actor)
20 return this->new_context<BoostContext>(std::move(code), actor, this);
25 BoostContext::BoostContext(std::function<void()>&& code, actor::ActorImpl* actor, SwappedContextFactory* factory)
26 : SwappedContext(std::move(code), actor, factory)
29 /* if the user provided a function for the process then use it, otherwise it is the context for maestro */
31 #if BOOST_VERSION < 106100
32 this->fc_ = boost::context::make_fcontext(get_stack_bottom(), smx_context_stack_size, BoostContext::wrapper);
35 boost::context::detail::make_fcontext(get_stack_bottom(), smx_context_stack_size, BoostContext::wrapper);
40 void BoostContext::wrapper(BoostContext::arg_type arg)
42 #if BOOST_VERSION < 106100
43 BoostContext* context = reinterpret_cast<BoostContext*>(arg);
45 BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
46 context->verify_previous_context(static_cast<BoostContext**>(arg.data)[0]);
47 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
49 smx_ctx_wrapper(context);
52 void BoostContext::swap_into(SwappedContext* to_)
54 BoostContext* to = static_cast<BoostContext*>(to_);
55 #if BOOST_VERSION < 106100
56 boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
58 BoostContext* ctx[2] = {this, to};
59 ASAN_ONLY(void* fake_stack = nullptr);
60 ASAN_ONLY(to->asan_ctx_ = this);
61 ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
62 boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
63 this->verify_previous_context(static_cast<BoostContext**>(arg.data)[0]);
64 ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_);
65 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
69 XBT_PRIVATE ContextFactory* boost_factory()
71 XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
72 return new BoostContextFactory();
74 } // namespace context
76 } // namespace simgrid