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/* jmpbuf.h -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2009-2013, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
**************************************************************************/
/**
* @file jmpbuf.h
*
* @brief Macros and functions to access the _JUMP_BUFFER initialized by a
* call to CILK_SETJMP before a cilk_spawn or cilk_sync. The definition of
* CILK_SETJMP and CILK_LONGJMP are OS dependent and in abi.h
*
*/
#ifndef INCLUDED_JMPBUF_DOT_H
#define INCLUDED_JMPBUF_DOT_H
#include <cilk/common.h>
#include <internal/abi.h>
#include <stddef.h>
#include <setjmp.h>
#if 0 /* defined CILK_USE_C_SETJMP && defined JB_RSP */
# define JMPBUF_SP(ctx) (ctx)[0].__jmpbuf[JB_RSP]
# define JMPBUF_FP(ctx) (ctx)[0].__jmpbuf[JB_RBP]
# define JMPBUF_PC(ctx) (ctx)[0].__jmpbuf[JB_PC]
#elif 0 /* defined CILK_USE_C_SETJMP && defined JB_SP */
# define JMPBUF_SP(ctx) (ctx)[0].__jmpbuf[JB_SP]
# define JMPBUF_FP(ctx) (ctx)[0].__jmpbuf[JB_BP]
# define JMPBUF_PC(ctx) (ctx)[0].__jmpbuf[JB_PC]
#elif defined _WIN64
# define JMPBUF_SP(ctx) ((_JUMP_BUFFER*)(&(ctx)))->Rsp
# define JMPBUF_FP(ctx) ((_JUMP_BUFFER*)(&(ctx)))->Rbp
# define JMPBUF_PC(ctx) ((_JUMP_BUFFER*)(&(ctx)))->Rip
#elif defined _WIN32
/** Fetch stack pointer from a __cilkrts_stack_frame */
# define JMPBUF_SP(ctx) (ctx).Esp
/** Fetch frame pointer from a __cilkrts_stack_frame */
# define JMPBUF_FP(ctx) (ctx).Ebp
/** Fetch program counter from a __cilkrts_stack_frame */
# define JMPBUF_PC(ctx) (ctx).Eip
#else /* defined __GNUC__ || defined __ICC */
/* word 0 is frame address
* word 1 is resume address
* word 2 is stack address */
# define JMPBUF_FP(ctx) (ctx)[0]
# define JMPBUF_PC(ctx) (ctx)[1]
# define JMPBUF_SP(ctx) (ctx)[2]
#endif
/**
* @brief Get frame pointer from jump buffer in__cilkrts_stack_frame.
*/
#define FP(SF) JMPBUF_FP((SF)->ctx)
/**
* @brief Get program counter from jump buffer in__cilkrts_stack_frame.
*/
#define PC(SF) JMPBUF_PC((SF)->ctx)
/**
* @brief Get stack pointer from jump buffer in__cilkrts_stack_frame.
*/
#define SP(SF) JMPBUF_SP((SF)->ctx)
__CILKRTS_BEGIN_EXTERN_C
/**
* Fetch the stack pointer from a __cilkrts_stack_frame. The jmpbuf was
* initialized before a cilk_spawn or cilk_sync.
*
* @param sf __cilkrts_stack_frame containing the jmpbuf.
*
* @return the stack pointer from the ctx.
*/
inline char *__cilkrts_get_sp(__cilkrts_stack_frame *sf)
{
return (char *)SP(sf);
}
/**
* Calculate the frame size from __cilkrts_stack_frame. The jmpbuf was
* initialized before a cilk_spawn or cilk_sync.
*
* @warning Returning an arbitrary value on Windows!
*
* @param sf __cilkrts_stack_frame containing the jmpbuf.
*
* @return the stack pointer from the ctx.
*/
inline ptrdiff_t __cilkrts_get_frame_size(__cilkrts_stack_frame *sf)
{
#ifdef _WIN32
if (0 == SP(sf))
return 256; // Arbitrary!
#endif
return (ptrdiff_t)FP(sf) - (ptrdiff_t)SP(sf);
}
__CILKRTS_END_EXTERN_C
#endif // ! defined(INCLUDED_JMPBUF_DOT_H)
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