X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/9104957deccc59e0e804215d5db498fabfd40d29..c76dff0228ca1145b553ffc73f0293ac8f8a75d1:/src/kernel/context/ContextSwapped.cpp diff --git a/src/kernel/context/ContextSwapped.cpp b/src/kernel/context/ContextSwapped.cpp index afbaa915c0..a19779195b 100644 --- a/src/kernel/context/ContextSwapped.cpp +++ b/src/kernel/context/ContextSwapped.cpp @@ -1,4 +1,4 @@ -/* Copyright (c) 2009-2020. The SimGrid Team. All rights reserved. */ +/* Copyright (c) 2009-2023. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ @@ -6,23 +6,17 @@ #include "simgrid/Exception.hpp" #include "simgrid/modelchecker.h" #include "src/internal_config.h" +#include "src/kernel/EngineImpl.hpp" #include "src/kernel/actor/ActorImpl.hpp" -#include "src/simix/smx_private.hpp" +#include "src/sthread/sthread.h" #include "xbt/parmap.hpp" #include "src/kernel/context/ContextSwapped.hpp" -#ifdef _WIN32 -#include -#include -#else +#include +#include #include -#endif - -#ifdef __MINGW32__ -#define _aligned_malloc __mingw_aligned_malloc -#define _aligned_free __mingw_aligned_free -#endif /*MINGW*/ +#include #if HAVE_VALGRIND_H #include @@ -34,7 +28,7 @@ #include #endif -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context); +XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ker_context); // The name of this function is currently hardcoded in MC (as string). // Do not change it without fixing those references as well. @@ -44,12 +38,16 @@ void smx_ctx_wrapper(simgrid::kernel::context::SwappedContext* context) __sanitizer_finish_switch_fiber(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_); #endif try { + sthread_enable(); (*context)(); - context->Context::stop(); + sthread_disable(); + context->stop(); } catch (simgrid::ForcefulKillException const&) { + sthread_disable(); XBT_DEBUG("Caught a ForcefulKillException"); } catch (simgrid::Exception const& e) { - XBT_INFO("Actor killed by an uncaught exception %s", simgrid::xbt::demangle(typeid(e).name()).get()); + sthread_disable(); + XBT_INFO("Actor killed by an uncaught exception %s", boost::core::demangle(typeid(e).name()).c_str()); throw; } #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT @@ -59,23 +57,21 @@ void smx_ctx_wrapper(simgrid::kernel::context::SwappedContext* context) THROW_IMPOSSIBLE; } -namespace simgrid { -namespace kernel { -namespace context { +namespace simgrid::kernel::context { /* thread-specific storage for the worker's context */ thread_local SwappedContext* SwappedContext::worker_context_ = nullptr; -SwappedContext::SwappedContext(std::function&& code, smx_actor_t actor, SwappedContextFactory* factory) - : Context(std::move(code), actor), factory_(*factory) +SwappedContext::SwappedContext(std::function&& code, actor::ActorImpl* actor, SwappedContextFactory* factory) + : Context(std::move(code), actor, not code /* maestro if no code */), factory_(*factory) { - // Save maestro (=context created first) in preparation for run_all - if (not SIMIX_context_is_parallel() && factory_.maestro_context_ == nullptr) + // Save maestro (=first created context) in preparation for run_all + if (not is_parallel() && factory_.maestro_context_ == nullptr) factory_.maestro_context_ = this; if (has_code()) { - xbt_assert((smx_context_stack_size & 0xf) == 0, "smx_context_stack_size should be multiple of 16"); - if (smx_context_guard_size > 0 && not MC_is_active()) { + xbt_assert((actor->get_stacksize() & 0xf) == 0, "Actor stack size should be multiple of 16"); + if (guard_size > 0 && not MC_is_active()) { #if PTH_STACKGROWTH != -1 xbt_die( "Stack overflow protection is known to be broken on your system: you stacks grow upwards (or detection is " @@ -85,43 +81,37 @@ SwappedContext::SwappedContext(std::function&& code, smx_actor_t actor, * Protected pages need to be put after the stack when PTH_STACKGROWTH == 1. */ #endif - size_t size = smx_context_stack_size + smx_context_guard_size; + size_t size = actor->get_stacksize() + guard_size; #if SIMGRID_HAVE_MC /* Cannot use posix_memalign when SIMGRID_HAVE_MC. Align stack by hand, and save the * pointer returned by xbt_malloc0. */ - unsigned char* alloc = static_cast(xbt_malloc0(size + xbt_pagesize)); + auto* alloc = static_cast(xbt_malloc0(size + xbt_pagesize)); stack_ = alloc - (reinterpret_cast(alloc) & (xbt_pagesize - 1)) + xbt_pagesize; reinterpret_cast(stack_)[-1] = alloc; -#elif !defined(_WIN32) +#else void* alloc; - if (posix_memalign(&alloc, xbt_pagesize, size) != 0) - xbt_die("Failed to allocate stack."); + xbt_assert(posix_memalign(&alloc, xbt_pagesize, size) == 0, "Failed to allocate stack."); this->stack_ = static_cast(alloc); -#else - this->stack_ = static_cast(_aligned_malloc(size, xbt_pagesize)); #endif -#ifndef _WIN32 - if (mprotect(this->stack_, smx_context_guard_size, PROT_NONE) == -1) { - xbt_die( - "Failed to protect stack: %s.\n" - "If you are running a lot of actors, you may be exceeding the amount of mappings allowed per process.\n" - "On Linux systems, change this value with sudo sysctl -w vm.max_map_count=newvalue (default value: 65536)\n" - "Please see " - "https://simgrid.org/doc/latest/Configuring_SimGrid.html#configuring-the-user-code-virtualization for more " - "information.", - strerror(errno)); - /* This is fatal. We are going to fail at some point when we try reusing this. */ - } -#endif - this->stack_ = this->stack_ + smx_context_guard_size; + /* This is fatal. We are going to fail at some point when we try reusing this. */ + xbt_assert( + mprotect(this->stack_, guard_size, PROT_NONE) != -1, + "Failed to protect stack: %s.\n" + "If you are running a lot of actors, you may be exceeding the amount of mappings allowed per process.\n" + "On Linux systems, change this value with sudo sysctl -w vm.max_map_count=newvalue (default value: 65536)\n" + "Please see https://simgrid.org/doc/latest/Configuring_SimGrid.html#configuring-the-user-code-virtualization " + "for more information.", + strerror(errno)); + + this->stack_ = this->stack_ + guard_size; } else { - this->stack_ = static_cast(xbt_malloc0(smx_context_stack_size)); + this->stack_ = static_cast(xbt_malloc0(actor->get_stacksize())); } #if HAVE_VALGRIND_H if (RUNNING_ON_VALGRIND) - this->valgrind_stack_id_ = VALGRIND_STACK_REGISTER(this->stack_, this->stack_ + smx_context_stack_size); + this->valgrind_stack_id_ = VALGRIND_STACK_REGISTER(this->stack_, this->stack_ + actor->get_stacksize()); #endif #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT this->asan_stack_ = get_stack_bottom(); @@ -146,32 +136,33 @@ SwappedContext::~SwappedContext() __tsan_destroy_fiber(tsan_fiber_); #endif #if HAVE_VALGRIND_H - if (RUNNING_ON_VALGRIND) + if (valgrind_stack_id_ != 0) VALGRIND_STACK_DEREGISTER(valgrind_stack_id_); #endif -#ifndef _WIN32 - if (smx_context_guard_size > 0 && not MC_is_active()) { - stack_ = stack_ - smx_context_guard_size; - if (mprotect(stack_, smx_context_guard_size, PROT_READ | PROT_WRITE) == -1) { + if (guard_size > 0 && not MC_is_active()) { + stack_ = stack_ - guard_size; + if (mprotect(stack_, guard_size, PROT_READ | PROT_WRITE) == -1) { XBT_WARN("Failed to remove page protection: %s", strerror(errno)); /* try to pursue anyway */ } #if SIMGRID_HAVE_MC - /* Retrieve the saved pointer. See SIMIX_context_stack_new above. */ + /* Retrieve the saved pointer. See the initialization above. */ stack_ = reinterpret_cast(stack_)[-1]; #endif } -#endif /* not windows */ xbt_free(stack_); } -void SwappedContext::stop() +unsigned char* SwappedContext::get_stack_bottom() const { - Context::stop(); - /* We must cut the actor execution using an exception to properly free the C++ RAII variables */ - throw ForcefulKillException(); + // Depending on the stack direction, its bottom (that make_fcontext needs) may be the lower or higher end +#if PTH_STACKGROWTH == 1 + return stack_; +#else + return stack_ + get_actor()->get_stacksize(); +#endif } void SwappedContext::swap_into(SwappedContext* to) @@ -193,17 +184,18 @@ void SwappedContext::swap_into(SwappedContext* to) } /** Maestro wants to run all ready actors */ -void SwappedContextFactory::run_all() +void SwappedContextFactory::run_all(std::vector const& actors_list) { + const auto* engine = EngineImpl::get_instance(); /* This function is called by maestro at the beginning of a scheduling round to get all working threads executing some * stuff It is much easier to understand what happens if you see the working threads as bodies that swap their soul * for the ones of the simulated processes that must run. */ - if (SIMIX_context_is_parallel()) { + if (Context::is_parallel()) { // We lazily create the parmap so that all options are actually processed when doing so. if (parmap_ == nullptr) - parmap_.reset( - new simgrid::xbt::Parmap(SIMIX_context_get_nthreads(), SIMIX_context_get_parallel_mode())); + parmap_ = + std::make_unique>(Context::get_nthreads(), Context::parallel_mode); // Usually, Parmap::apply() executes the provided function on all elements of the array. // Here, the executed function does not return the control to the parmap before all the array is processed: @@ -212,17 +204,17 @@ void SwappedContextFactory::run_all() // It only yields back to worker_context when the work array is exhausted. // - So, resume() is only launched from the parmap for the first job of each minion. parmap_->apply( - [](const actor::ActorImpl* process) { - SwappedContext* context = static_cast(process->context_.get()); + [](const actor::ActorImpl* actor) { + auto* context = static_cast(actor->context_.get()); context->resume(); }, - simix_global->actors_to_run); + actors_list); } else { // sequential execution - if (simix_global->actors_to_run.empty()) + if (actors_list.empty()) return; /* maestro is already saved in the first slot of workers_context_ */ - const actor::ActorImpl* first_actor = simix_global->actors_to_run.front(); + const actor::ActorImpl* first_actor = engine->get_first_actor_to_run(); process_index_ = 1; /* execute the first actor; it will chain to the others when using suspend() */ static_cast(first_actor->context_.get())->resume(); @@ -237,11 +229,12 @@ void SwappedContextFactory::run_all() */ void SwappedContext::resume() { - SwappedContext* old = static_cast(self()); - if (SIMIX_context_is_parallel()) { + auto* old = static_cast(self()); + if (is_parallel()) { // Save my current soul (either maestro, or one of the minions) in a thread-specific area worker_context_ = old; } + sthread_enable(); // Switch my soul and the actor's one Context::set_current(this); old->swap_into(this); @@ -260,9 +253,9 @@ void SwappedContext::resume() void SwappedContext::suspend() { SwappedContext* next_context; - if (SIMIX_context_is_parallel()) { + if (is_parallel()) { // Get some more work to directly swap into the next executable actor instead of yielding back to the parmap - boost::optional next_work = factory_.parmap_->next(); + boost::optional next_work = factory_.parmap_->next(); if (next_work) { // There is a next soul to embody (ie, another executable actor) XBT_DEBUG("Run next process"); @@ -275,17 +268,20 @@ void SwappedContext::suspend() // When given that soul, the body will wait for the next scheduling round } } else { // sequential execution + const auto* engine = EngineImpl::get_instance(); /* determine the next context */ unsigned long int i = factory_.process_index_; factory_.process_index_++; - if (i < simix_global->actors_to_run.size()) { + if (i < engine->get_actor_to_run_count()) { /* Actually swap into the next actor directly without transiting to maestro */ XBT_DEBUG("Run next actor"); - next_context = static_cast(simix_global->actors_to_run[i]->context_.get()); + sthread_enable(); + next_context = static_cast(engine->get_actor_to_run_at(i)->context_.get()); } else { /* all processes were run, actually return to maestro */ XBT_DEBUG("No more actors to run"); + sthread_disable(); next_context = factory_.maestro_context_; } } @@ -293,6 +289,4 @@ void SwappedContext::suspend() this->swap_into(next_context); } -} // namespace context -} // namespace kernel -} // namespace simgrid +} // namespace simgrid::kernel::context