-/* Copyright (c) 2009-2021. 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. */
#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"
#include <boost/core/demangle.hpp>
#include <memory>
-
-#ifdef _WIN32
-#include <malloc.h>
-#include <windows.h>
-#else
#include <sys/mman.h>
-#endif
-
-#ifdef __MINGW32__
-#define _aligned_malloc __mingw_aligned_malloc
-#define _aligned_free __mingw_aligned_free
-#endif /*MINGW*/
+#include <typeinfo>
#if HAVE_VALGRIND_H
#include <valgrind/valgrind.h>
#include <sanitizer/tsan_interface.h>
#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.
__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) {
+ sthread_disable();
XBT_INFO("Actor killed by an uncaught exception %s", boost::core::demangle(typeid(e).name()).c_str());
throw;
}
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<void()>&& code, smx_actor_t actor, SwappedContextFactory* factory)
- : Context(std::move(code), actor), factory_(*factory)
+SwappedContext::SwappedContext(std::function<void()>&& code, actor::ActorImpl* actor, SwappedContextFactory* factory)
+ : Context(std::move(code), actor, not code /* maestro if no code */), factory_(*factory)
{
// Save maestro (=first created context) in preparation for run_all
- if (not SIMIX_context_is_parallel() && factory_.maestro_context_ == nullptr)
+ if (not is_parallel() && factory_.maestro_context_ == nullptr)
factory_.maestro_context_ = this;
if (has_code()) {
xbt_assert((actor->get_stacksize() & 0xf) == 0, "Actor stack size should be multiple of 16");
- if (smx_context_guard_size > 0 && not MC_is_active()) {
+ 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 "
* Protected pages need to be put after the stack when PTH_STACKGROWTH == 1. */
#endif
- size_t size = actor->get_stacksize() + 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. */
auto* alloc = static_cast<unsigned char*>(xbt_malloc0(size + xbt_pagesize));
stack_ = alloc - (reinterpret_cast<uintptr_t>(alloc) & (xbt_pagesize - 1)) + xbt_pagesize;
reinterpret_cast<unsigned char**>(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<unsigned char*>(alloc);
-#else
- this->stack_ = static_cast<unsigned char*>(_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<unsigned char*>(xbt_malloc0(actor->get_stacksize()));
}
__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<unsigned char**>(stack_)[-1];
#endif
}
-#endif /* not windows */
xbt_free(stack_);
}
#endif
}
-void SwappedContext::stop()
-{
- Context::stop();
- /* We must cut the actor execution using an exception to properly free the C++ RAII variables */
- throw ForcefulKillException();
-}
-
void SwappedContext::swap_into(SwappedContext* to)
{
#if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
}
/** Maestro wants to run all ready actors */
-void SwappedContextFactory::run_all()
+void SwappedContextFactory::run_all(std::vector<actor::ActorImpl*> 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_ = std::make_unique<simgrid::xbt::Parmap<smx_actor_t>>(SIMIX_context_get_nthreads(),
- SIMIX_context_get_parallel_mode());
+ parmap_ =
+ std::make_unique<simgrid::xbt::Parmap<actor::ActorImpl*>>(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:
// 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) {
- auto* context = static_cast<SwappedContext*>(process->context_.get());
+ [](const actor::ActorImpl* actor) {
+ auto* context = static_cast<SwappedContext*>(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<SwappedContext*>(first_actor->context_.get())->resume();
void SwappedContext::resume()
{
auto* old = static_cast<SwappedContext*>(self());
- if (SIMIX_context_is_parallel()) {
+ 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);
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<smx_actor_t> next_work = factory_.parmap_->next();
+ boost::optional<actor::ActorImpl*> next_work = factory_.parmap_->next();
if (next_work) {
// There is a next soul to embody (ie, another executable actor)
XBT_DEBUG("Run next process");
// 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<SwappedContext*>(simix_global->actors_to_run[i]->context_.get());
+ sthread_enable();
+ next_context = static_cast<SwappedContext*>(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_;
}
}
this->swap_into(next_context);
}
-} // namespace context
-} // namespace kernel
-} // namespace simgrid
+} // namespace simgrid::kernel::context
