X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/b9945098e2ba4e7b639e0c2245835d44800c1b29..5ed37babb2fa9097abe82df299c0aa259ed84d5a:/src/kernel/context/ContextUnix.cpp

diff --git a/src/kernel/context/ContextUnix.cpp b/src/kernel/context/ContextUnix.cpp
index 70a87d20ca..97e8a5170f 100644
--- a/src/kernel/context/ContextUnix.cpp
+++ b/src/kernel/context/ContextUnix.cpp
@@ -1,21 +1,18 @@
-/* Copyright (c) 2009-2019. 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. */
 
 /* \file UContext.cpp Context switching with ucontexts from System V        */
 
-#include "context_private.hpp"
-
 #include "mc/mc.h"
 #include "simgrid/Exception.hpp"
 #include "src/kernel/actor/ActorImpl.hpp"
-#include "src/mc/mc_ignore.hpp"
-#include "src/simix/smx_private.hpp"
+#include "src/mc/remote/AppSide.hpp"
 
 #include "ContextUnix.hpp"
 
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(ker_context);
 
 /** Up to two integers may be needed to store a pointer on the system we target */
 constexpr int CTX_ADDR_LEN = 2;
@@ -23,40 +20,22 @@ constexpr int CTX_ADDR_LEN = 2;
 static_assert(sizeof(simgrid::kernel::context::UContext*) <= CTX_ADDR_LEN * sizeof(int),
               "Ucontexts are not supported on this arch yet. Please increase CTX_ADDR_LEN.");
 
-/* Make sure that this symbol is easy to recognize by name, even on exotic platforms */
+// This function is called by makecontext(3): use extern "C" to have C language linkage for its type
 extern "C" {
-static void smx_ctx_wrapper(int i1, int i2);
-}
-
-// The name of this function is currently hardcoded in MC (as string).
-// Do not change it without fixing those references as well.
-static void smx_ctx_wrapper(int i1, int i2)
+XBT_ATTRIB_NORETURN static void sysv_ctx_wrapper(int i1, int i2)
 {
   // Rebuild the Context* pointer from the integers:
   int ctx_addr[CTX_ADDR_LEN] = {i1, i2};
   simgrid::kernel::context::UContext* context;
   memcpy(&context, ctx_addr, sizeof context);
-
-  ASAN_FINISH_SWITCH(nullptr, &context->asan_ctx_->asan_stack_, &context->asan_ctx_->asan_stack_size_);
-  try {
-    (*context)();
-    context->Context::stop();
-  } catch (simgrid::ForcefulKillException const&) {
-    XBT_DEBUG("Caught a ForcefulKillException");
-  } catch (simgrid::Exception const& e) {
-    XBT_INFO("Actor killed by an uncatched exception %s", simgrid::xbt::demangle(typeid(e).name()).get());
-    throw;
-  }
-  ASAN_ONLY(context->asan_stop_ = true);
-  context->suspend();
+  smx_ctx_wrapper(context);
+}
 }
 
-namespace simgrid {
-namespace kernel {
-namespace context {
+namespace simgrid::kernel::context {
 
 // UContextFactory
-Context* UContextFactory::create_context(std::function<void()>&& code, smx_actor_t actor)
+UContext* UContextFactory::create_context(std::function<void()>&& code, actor::ActorImpl* actor)
 {
   return new_context<UContext>(std::move(code), actor, this);
 }
@@ -64,39 +43,35 @@ Context* UContextFactory::create_context(std::function<void()>&& code, smx_actor
 
 // UContext
 
-UContext::UContext(std::function<void()>&& code, smx_actor_t actor, SwappedContextFactory* factory)
+UContext::UContext(std::function<void()>&& code, actor::ActorImpl* actor, SwappedContextFactory* factory)
     : SwappedContext(std::move(code), actor, factory)
 {
+  XBT_VERB("Creating a context of stack %uMb", actor->get_stacksize() / 1024 / 1024);
   /* if the user provided a function for the actor then use it. If not, nothing to do for maestro. */
   if (has_code()) {
     getcontext(&this->uc_);
     this->uc_.uc_link = nullptr;
     this->uc_.uc_stack.ss_sp   = sg_makecontext_stack_addr(get_stack());
-    this->uc_.uc_stack.ss_size = sg_makecontext_stack_size(smx_context_usable_stack_size);
+    this->uc_.uc_stack.ss_size = sg_makecontext_stack_size(actor->get_stacksize());
     // Makecontext expects integer arguments; we want to pass a pointer.
-    // This context address is decomposed into a serie of integers, which are passed as arguments to makecontext.
+    // This context address is decomposed into a series of integers, which are passed as arguments to makecontext.
 
     int ctx_addr[CTX_ADDR_LEN]{};
     UContext* arg = this;
-    memcpy(ctx_addr, &arg, sizeof this);
-    makecontext(&this->uc_, (void (*)())smx_ctx_wrapper, 2, ctx_addr[0], ctx_addr[1]);
+    memcpy(ctx_addr, &arg, sizeof arg);
+    makecontext(&this->uc_, (void (*)())sysv_ctx_wrapper, 2, ctx_addr[0], ctx_addr[1]);
 
 #if SIMGRID_HAVE_MC
-    if (MC_is_active()) {
-      MC_register_stack_area(get_stack(), actor, &(this->uc_), smx_context_usable_stack_size);
-    }
+    if (MC_is_active())
+      simgrid::mc::AppSide::get()->declare_stack(get_stack(), stack_size, &uc_);
 #endif
   }
 }
 
-void UContext::swap_into(SwappedContext* to_)
+void UContext::swap_into_for_real(SwappedContext* to_)
 {
-  UContext* to = static_cast<UContext*>(to_);
-  ASAN_ONLY(void* fake_stack = nullptr);
-  ASAN_ONLY(to->asan_ctx_ = this);
-  ASAN_START_SWITCH(this->asan_stop_ ? nullptr : &fake_stack, to->asan_stack_, to->asan_stack_size_);
+  const UContext* to = static_cast<UContext*>(to_);
   swapcontext(&this->uc_, &to->uc_);
-  ASAN_FINISH_SWITCH(fake_stack, &this->asan_ctx_->asan_stack_, &this->asan_ctx_->asan_stack_size_);
 }
 
 
@@ -105,4 +80,4 @@ XBT_PRIVATE ContextFactory* sysv_factory()
   XBT_VERB("Activating SYSV context factory");
   return new UContextFactory();
 }
-}}} // namespace simgrid::kernel::context
+} // namespace simgrid::kernel::context