#define ASAN_EVAL(expr) (expr)
#define ASAN_START_SWITCH(fake_stack_save, bottom, size) __sanitizer_start_switch_fiber(fake_stack_save, bottom, size)
#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) \
__sanitizer_finish_switch_fiber(fake_stack_save, bottom_old, size_old)
#else
#define ASAN_EVAL(expr) (expr)
#define ASAN_START_SWITCH(fake_stack_save, bottom, size) __sanitizer_start_switch_fiber(fake_stack_save, bottom, size)
#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) \
__sanitizer_finish_switch_fiber(fake_stack_save, bottom_old, size_old)
#else
#define ASAN_EVAL(expr) (void)0
#define ASAN_START_SWITCH(fake_stack_save, bottom, size) (void)0
#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) (void)(fake_stack_save)
#define ASAN_EVAL(expr) (void)0
#define ASAN_START_SWITCH(fake_stack_save, bottom, size) (void)0
#define ASAN_FINISH_SWITCH(fake_stack_save, bottom_old, size_old) (void)(fake_stack_save)