1 /* Copyright (c) 2009-2020. 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 #ifndef SIMGRID_KERNEL_CONTEXT_SWAPPED_CONTEXT_HPP
7 #define SIMGRID_KERNEL_CONTEXT_SWAPPED_CONTEXT_HPP
9 #include "src/kernel/context/Context.hpp"
17 } // namespace context
19 } // namespace simgrid
21 /* Use extern "C" to make sure that this symbol is easy to recognize by name, even on exotic platforms */
22 extern "C" XBT_ATTRIB_NORETURN void smx_ctx_wrapper(simgrid::kernel::context::SwappedContext* context);
28 class SwappedContextFactory : public ContextFactory {
29 friend SwappedContext; // Reads whether we are in parallel mode
31 SwappedContextFactory() = default;
32 SwappedContextFactory(const SwappedContextFactory&) = delete;
33 SwappedContextFactory& operator=(const SwappedContextFactory&) = delete;
34 void run_all() override;
37 /* For the sequential execution */
38 unsigned long process_index_ = 0; // next actor to execute
39 SwappedContext* maestro_context_ = nullptr; // save maestro's context
41 /* For the parallel execution, will be created lazily with the right parameters if needed (ie, in parallel) */
42 std::unique_ptr<simgrid::xbt::Parmap<smx_actor_t>> parmap_{nullptr};
45 class SwappedContext : public Context {
46 friend void ::smx_ctx_wrapper(simgrid::kernel::context::SwappedContext*);
49 SwappedContext(std::function<void()>&& code, smx_actor_t get_actor, SwappedContextFactory* factory);
50 SwappedContext(const SwappedContext&) = delete;
51 SwappedContext& operator=(const SwappedContext&) = delete;
52 virtual ~SwappedContext();
54 void suspend() override;
55 virtual void resume();
56 XBT_ATTRIB_NORETURN void stop() override;
58 virtual void swap_into(SwappedContext* to) = 0; // Defined in Raw, Boost and UContext subclasses
60 unsigned char* get_stack() const { return stack_; }
61 // Return the address for the bottom of the stack. Depending on the stack direction it may be the lower or higher
63 unsigned char* get_stack_bottom() const { return PTH_STACKGROWTH == -1 ? stack_ + smx_context_stack_size : stack_; }
65 #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
66 const void* asan_stack_ = nullptr;
67 size_t asan_stack_size_ = 0;
68 SwappedContext* asan_ctx_ = nullptr;
69 bool asan_stop_ = false;
73 // With ASan, after a context switch, check that the originating context is the expected one (see BoostContext)
74 void verify_previous_context(const SwappedContext* context) const;
77 static thread_local SwappedContext* worker_context_;
79 unsigned char* stack_ = nullptr; // the thread stack
80 SwappedContextFactory& factory_; // for sequential and parallel run_all()
83 unsigned int valgrind_stack_id_;
87 inline void SwappedContext::verify_previous_context(XBT_ATTRIB_UNUSED const SwappedContext* context) const
89 #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
90 xbt_assert(this->asan_ctx_ == context);
94 } // namespace context
96 } // namespace simgrid