1 /* Copyright (c) 2015-2018. 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 smx_context_t BoostContextFactory::create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup_func,
21 return this->new_context<BoostContext>(std::move(code), cleanup_func, process, this);
26 BoostContext::BoostContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process,
27 SwappedContextFactory* factory)
28 : SwappedContext(std::move(code), cleanup_func, process, factory)
31 /* if the user provided a function for the process then use it, otherwise it is the context for maestro */
33 /* We need to pass the bottom of the stack to make_fcontext,
34 depending on the stack direction it may be the lower or higher address: */
35 #if PTH_STACKGROWTH == -1
36 void* stack = static_cast<char*>(this->stack_) + smx_context_usable_stack_size;
38 void* stack = this->stack_;
40 ASAN_ONLY(this->asan_stack_ = stack);
41 #if BOOST_VERSION < 106100
42 this->fc_ = boost::context::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper);
44 this->fc_ = boost::context::detail::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper);
47 #if BOOST_VERSION < 105600
48 this->fc_ = new boost::context::fcontext_t();
50 if (get_maestro() == nullptr)
55 BoostContext::~BoostContext()
57 #if BOOST_VERSION < 105600
63 void BoostContext::wrapper(BoostContext::arg_type arg)
65 #if BOOST_VERSION < 106100
66 BoostContext* context = reinterpret_cast<BoostContext*>(arg);
68 BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
69 ASAN_ONLY(xbt_assert(context->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
70 ASAN_FINISH_SWITCH(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_);
71 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
75 } catch (StopRequest const&) {
76 XBT_DEBUG("Caught a StopRequest");
77 } catch (simgrid::Exception const& e) {
78 XBT_INFO("Actor killed by an uncatched exception %s", simgrid::xbt::demangle(typeid(e).name()).get());
81 context->Context::stop();
82 ASAN_ONLY(context->asan_stop_ = true);
86 void BoostContext::swap_into(SwappedContext* to_)
88 BoostContext* to = static_cast<BoostContext*>(to_);
89 #if BOOST_VERSION < 105600
90 boost::context::jump_fcontext(this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
91 #elif BOOST_VERSION < 106100
92 boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
94 BoostContext* ctx[2] = {this, to};
95 ASAN_ONLY(void* fake_stack = nullptr);
96 ASAN_ONLY(to->asan_ctx_ = from);
97 ASAN_START_SWITCH(from->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
98 boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
99 ASAN_ONLY(xbt_assert(from->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
100 ASAN_FINISH_SWITCH(fake_stack, &from->asan_ctx_->asan_stack_, &from->asan_ctx_->asan_stack_size_);
101 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
105 XBT_PRIVATE ContextFactory* boost_factory()
107 XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
108 return new BoostContextFactory();