src/kernel/context/context_private.hpp

   1 /* Copyright (c) 2017-2019. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #ifndef SIMGRID_KERNEL_CONTEXT_PRIVATE_HPP
   7 #define SIMGRID_KERNEL_CONTEXT_PRIVATE_HPP
   8
   9 #include "src/internal_config.h"
  10
  11 #if HAVE_SANITIZER_ADDRESS_FIBER_SUPPORT
  12 #include <sanitizer/asan_interface.h>
  13 #define ASAN_ONLY(expr) expr
  14 #define ASAN_START_SWITCH(fake_stack_save, bottom, size) __sanitizer_start_switch_fiber(fake_stack_save, bottom, size)
  15 #define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old)                                                      \
  16   __sanitizer_finish_switch_fiber(fake_stack_save, bottom_old, size_old)
  17 #else
  18 #define ASAN_ONLY(expr) (void)0
  19 #define ASAN_START_SWITCH(fake_stack_save, bottom, size) (void)0
  20 #define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) (void)0
  21 #endif
  22
  23 /* We are using the bottom of the stack to save some information, like the
  24  * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
  25  * size for the stack. Round its value to a multiple of 16 (asan wants the stacks to be aligned this way). */
  26 #if HAVE_VALGRIND_H
  27 #define smx_context_usable_stack_size                                                                                  \
  28   ((smx_context_stack_size - sizeof(unsigned int)) & ~0xf) /* for valgrind_stack_id */
  29 #else
  30 #define smx_context_usable_stack_size (smx_context_stack_size & ~0xf)
  31 #endif
  32
  33 #endif