1 /* Copyright (c) 2015-2019. 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 actor,
27 SwappedContextFactory* factory)
28 : SwappedContext(std::move(code), cleanup_func, actor, 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*>(get_stack()) + smx_context_usable_stack_size;
38 void* stack = get_stack();
40 #if BOOST_VERSION < 106100
41 this->fc_ = boost::context::make_fcontext(stack, smx_context_usable_stack_size, BoostContext::wrapper);
43 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();
53 BoostContext::~BoostContext()
55 #if BOOST_VERSION < 105600
61 void BoostContext::wrapper(BoostContext::arg_type arg)
63 #if BOOST_VERSION < 106100
64 BoostContext* context = reinterpret_cast<BoostContext*>(arg);
66 BoostContext* context = static_cast<BoostContext**>(arg.data)[1];
67 ASAN_ONLY(xbt_assert(context->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
68 ASAN_FINISH_SWITCH(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_);
69 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
73 context->Context::stop();
74 } catch (StopRequest const&) {
75 XBT_DEBUG("Caught a StopRequest");
76 } catch (simgrid::Exception const& e) {
77 XBT_INFO("Actor killed by an uncatched exception %s", simgrid::xbt::demangle(typeid(e).name()).get());
80 ASAN_ONLY(context->asan_stop_ = true);
84 void BoostContext::swap_into(SwappedContext* to_)
86 BoostContext* to = static_cast<BoostContext*>(to_);
87 #if BOOST_VERSION < 105600
88 boost::context::jump_fcontext(this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
89 #elif BOOST_VERSION < 106100
90 boost::context::jump_fcontext(&this->fc_, to->fc_, reinterpret_cast<intptr_t>(to));
92 BoostContext* ctx[2] = {this, to};
93 ASAN_ONLY(void* fake_stack = nullptr);
94 ASAN_ONLY(to->asan_ctx_ = this);
95 ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
96 boost::context::detail::transfer_t arg = boost::context::detail::jump_fcontext(to->fc_, ctx);
97 ASAN_ONLY(xbt_assert(this->asan_ctx_ == static_cast<BoostContext**>(arg.data)[0]));
98 ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_);
99 static_cast<BoostContext**>(arg.data)[0]->fc_ = arg.fctx;
103 XBT_PRIVATE ContextFactory* boost_factory()
105 XBT_VERB("Using Boost contexts. Welcome to the 21th century.");
106 return new BoostContextFactory();