/*
* Copyright (c) 1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1996 by Silicon Graphics. All rights reserved.
* Copyright (c) 1998 by Fergus Henderson. All rights reserved.
* Copyright (c) 2000-2009 by Hewlett-Packard Development Company.
* All rights reserved.
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
struct thread_stop_info {
# if !defined(GC_OPENBSD_UTHREADS) && !defined(NACL) \
&& !defined(PLATFORM_STOP_WORLD) && !defined(SN_TARGET_PSP2)
volatile AO_t last_stop_count;
/* The value of GC_stop_count when the thread */
/* last successfully handled a suspend signal. */
# ifdef GC_ENABLE_SUSPEND_THREAD
volatile AO_t ext_suspend_cnt;
/* An odd value means thread was suspended */
/* externally. Incremented on every call of */
/* GC_suspend_thread() and GC_resume_thread(). */
/* Updated with the GC lock held, but could be */
/* read from a signal handler. */
# endif
# endif
ptr_t stack_ptr; /* Valid only when stopped. */
# ifdef NACL
/* Grab NACL_GC_REG_STORAGE_SIZE pointers off the stack when */
/* going into a syscall. 20 is more than we need, but it's an */
/* overestimate in case the instrumented function uses any callee */
/* saved registers, they may be pushed to the stack much earlier. */
/* Also, on x64 'push' puts 8 bytes on the stack even though */
/* our pointers are 4 bytes. */
# ifdef ARM32
/* Space for r4-r8, r10-r12, r14. */
# define NACL_GC_REG_STORAGE_SIZE 9
# else
# define NACL_GC_REG_STORAGE_SIZE 20
# endif
ptr_t reg_storage[NACL_GC_REG_STORAGE_SIZE];
# elif defined(PLATFORM_HAVE_GC_REG_STORAGE_SIZE)
word registers[PLATFORM_GC_REG_STORAGE_SIZE]; /* used externally */
# endif
};
