1 /* Copyright (c) 2009-2019. 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 #ifndef SIMGRID_SIMIX_RAW_CONTEXT_HPP
7 #define SIMGRID_SIMIX_RAW_CONTEXT_HPP
14 #include <xbt/parmap.hpp>
15 #include <xbt/xbt_os_thread.h>
17 #include "src/kernel/context/ContextSwapped.hpp"
23 /** @brief Fast context switching inspired from SystemV ucontexts.
25 * The main difference to the System V context is that Raw Contexts are much faster because they don't
26 * preserve the signal mask when switching. This saves a system call (at least on Linux) on each context switch.
28 class RawContext : public SwappedContext {
30 RawContext(std::function<void()> code, void_pfn_smxprocess_t cleanup_func, smx_actor_t process,
31 SwappedContextFactory* factory);
33 void swap_into(SwappedContext* to) override;
36 /** pointer to top the stack stack */
37 void* stack_top_ = nullptr;
39 #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
40 const void* asan_stack_ = nullptr;
41 size_t asan_stack_size_ = 0;
42 RawContext* asan_ctx_ = nullptr;
43 bool asan_stop_ = false;
46 static void wrapper(void* arg);
49 class RawContextFactory : public SwappedContextFactory {
51 RawContextFactory() : SwappedContextFactory("RawContextFactory") {}
53 Context* create_context(std::function<void()> code, void_pfn_smxprocess_t cleanup, smx_actor_t process) override;