Update copyright lines for 2022.

[simgrid.git] / src / kernel / context / ContextSwapped.hpp

diff --git a/src/kernel/context/ContextSwapped.hpp b/src/kernel/context/ContextSwapped.hpp
index c495b34..297eb69 100644 (file)
--- a/src/kernel/context/ContextSwapped.hpp
+++ b/src/kernel/context/ContextSwapped.hpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2009-2020. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2009-2022. 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. */
@@ -6,6 +6,7 @@
 #ifndef SIMGRID_KERNEL_CONTEXT_SWAPPED_CONTEXT_HPP
 #define SIMGRID_KERNEL_CONTEXT_SWAPPED_CONTEXT_HPP
 
+#include "src/internal_config.h" // HAVE_SANITIZER_*
 #include "src/kernel/context/Context.hpp"
 
 #include <memory>
@@ -14,6 +15,16 @@ namespace simgrid {
 namespace kernel {
 namespace context {
 class SwappedContext;
+} // namespace context
+} // namespace kernel
+} // namespace simgrid
+
+/* Use extern "C" to make sure that this symbol is easy to recognize by name, even on exotic platforms */
+extern "C" XBT_ATTRIB_NORETURN void smx_ctx_wrapper(simgrid::kernel::context::SwappedContext* context);
+
+namespace simgrid {
+namespace kernel {
+namespace context {
 
 class SwappedContextFactory : public ContextFactory {
   friend SwappedContext; // Reads whether we are in parallel mode
@@ -29,33 +40,31 @@ private:
   SwappedContext* maestro_context_ = nullptr; // save maestro's context
 
   /* For the parallel execution, will be created lazily with the right parameters if needed (ie, in parallel) */
-  std::unique_ptr<simgrid::xbt::Parmap<smx_actor_t>> parmap_{nullptr};
+  std::unique_ptr<simgrid::xbt::Parmap<actor::ActorImpl*>> parmap_{nullptr};
 };
 
 class SwappedContext : public Context {
+  friend void ::smx_ctx_wrapper(simgrid::kernel::context::SwappedContext*);
+
 public:
-  SwappedContext(std::function<void()>&& code, smx_actor_t get_actor, SwappedContextFactory* factory);
+  SwappedContext(std::function<void()>&& code, actor::ActorImpl* get_actor, SwappedContextFactory* factory);
   SwappedContext(const SwappedContext&) = delete;
   SwappedContext& operator=(const SwappedContext&) = delete;
-  virtual ~SwappedContext();
+  ~SwappedContext() override;
 
   void suspend() override;
   virtual void resume();
   XBT_ATTRIB_NORETURN void stop() override;
 
-  virtual void swap_into(SwappedContext* to) = 0; // Defined in Raw, Boost and UContext subclasses
+  void swap_into(SwappedContext* to);
 
+protected:
   unsigned char* get_stack() const { return stack_; }
-  // Return the address for the bottom of the stack.  Depending on the stack direction it may be the lower or higher
-  // address
-  unsigned char* get_stack_bottom() const { return PTH_STACKGROWTH == -1 ? stack_ + smx_context_stack_size : stack_; }
+  unsigned char* get_stack_bottom() const; // Depending on the stack direction, its bottom (that Boost::make_fcontext
+                                           // needs) may be the lower or higher end
 
-#if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
-  const void* asan_stack_   = nullptr;
-  size_t asan_stack_size_   = 0;
-  SwappedContext* asan_ctx_ = nullptr;
-  bool asan_stop_           = false;
-#endif
+  // With ASan, after a context switch, check that the originating context is the expected one (see BoostContext)
+  void verify_previous_context(const SwappedContext* context) const;
 
 private:
   static thread_local SwappedContext* worker_context_;
@@ -64,10 +73,28 @@ private:
   SwappedContextFactory& factory_; // for sequential and parallel run_all()
 
 #if HAVE_VALGRIND_H
-  unsigned int valgrind_stack_id_;
+  unsigned int valgrind_stack_id_ = 0;
 #endif
+#if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
+  const void* asan_stack_   = nullptr;
+  size_t asan_stack_size_   = 0;
+  SwappedContext* asan_ctx_ = nullptr;
+  bool asan_stop_           = false;
+#endif
+#if HAVE_SANITIZER_THREAD_FIBER_SUPPORT
+  void* tsan_fiber_;
+#endif
+
+  virtual void swap_into_for_real(SwappedContext* to) = 0; // Defined in Raw, Boost and UContext subclasses
 };
 
+inline void SwappedContext::verify_previous_context(XBT_ATTRIB_UNUSED const SwappedContext* context) const
+{
+#if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
+  xbt_assert(this->asan_ctx_ == context);
+#endif
+}
+
 } // namespace context
 } // namespace kernel
 } // namespace simgrid