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/* full_frame.c -*-C++-*-
*
*************************************************************************
*
* Copyright (C) 2010-2011
* Intel Corporation
*
* This file is part of the Intel Cilk Plus Library. This library is free
* software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the
* Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Under Section 7 of GPL version 3, you are granted additional
* permissions described in the GCC Runtime Library Exception, version
* 3.1, as published by the Free Software Foundation.
*
* You should have received a copy of the GNU General Public License and
* a copy of the GCC Runtime Library Exception along with this program;
* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
* <http://www.gnu.org/licenses/>.
*
**************************************************************************/
#include "full_frame.h"
#include "stats.h"
#include "os.h"
#include "bug.h"
#include "jmpbuf.h"
#include "frame_malloc.h"
COMMON_PORTABLE
full_frame *__cilkrts_make_full_frame(__cilkrts_worker *w,
__cilkrts_stack_frame *sf)
{
full_frame *ff;
START_INTERVAL(w, INTERVAL_ALLOC_FULL_FRAME) {
ff = (full_frame *)__cilkrts_frame_malloc(w, sizeof(*ff));
__cilkrts_mutex_init(&ff->lock);
ff->full_frame_magic_0 = FULL_FRAME_MAGIC_0;
ff->join_counter = 0;
ff->parent = 0;
ff->rightmost_child = 0;
ff->left_sibling = ff->right_sibling = 0;
ff->call_stack = sf;
ff->is_call_child = 0;
ff->simulated_stolen = 0;
ff->children_reducer_map = ff->right_reducer_map = 0;
ff->pending_exception =
ff->child_pending_exception =
ff->right_pending_exception = NULL;
ff->sync_sp = 0;
#ifdef _WIN32
ff->exception_sp = 0;
ff->trylevel = (unsigned long)-1;
ff->registration = 0;
#endif
ff->frame_size = 0;
// ff->exception_sp_offset = 0;
// ff->eh_kind = EH_NONE;
ff->stack_self = 0;
ff->stack_child = 0;
ff->sync_master = 0;
/*__cilkrts_init_full_frame_sysdep(w, ff);*/
ff->full_frame_magic_1 = FULL_FRAME_MAGIC_1;
} STOP_INTERVAL(w, INTERVAL_ALLOC_FULL_FRAME);
return ff;
}
COMMON_PORTABLE void __cilkrts_put_stack(full_frame *ff,
__cilkrts_stack_frame *sf)
{
/* When suspending frame ff prior to stealing it, __cilkrts_put_stack is
* used to store the stack pointer for eventual sync. When suspending
* frame ff prior to a sync, __cilkrts_put_stack is called to re-establish
* the sync stack pointer, offsetting it by any change in the stack depth
* that occured between the spawn and the sync.
* Although it is not usually meaningful to add two pointers, the value of
* ff->sync_sp at the time of this call is really an integer, not a
* pointer.
*/
ptrdiff_t sync_sp_i = (ptrdiff_t) ff->sync_sp;
char* sp = (char*) __cilkrts_get_sp(sf);
ff->sync_sp = sp + sync_sp_i;
DBGPRINTF("%d- __cilkrts_put_stack - adjust (+) sync "
"stack of full frame %p (+sp: %p) to %p\n",
__cilkrts_get_tls_worker()->self, ff, sp, ff->sync_sp);
}
COMMON_PORTABLE void __cilkrts_take_stack(full_frame *ff, void *sp)
{
/* When resuming the parent after a steal, __cilkrts_take_stack is used to
* subtract the new stack pointer from the current stack pointer, storing
* the offset in ff->sync_sp. When resuming after a sync,
* __cilkrts_take_stack is used to subtract the new stack pointer from
* itself, leaving ff->sync_sp at zero (null). Although the pointers being
* subtracted are not part of the same contiguous chunk of memory, the
* flat memory model allows us to subtract them and get a useable offset.
*/
ptrdiff_t sync_sp_i = ff->sync_sp - (char*) sp;
ff->sync_sp = (char *) sync_sp_i;
DBGPRINTF("%d- __cilkrts_take_stack - adjust (-) sync "
"stack of full frame %p to %p (-sp: %p)\n",
__cilkrts_get_tls_worker()->self, ff, ff->sync_sp, sp);
}
COMMON_PORTABLE
void __cilkrts_destroy_full_frame(__cilkrts_worker *w, full_frame *ff)
{
validate_full_frame(ff);
CILK_ASSERT(ff->children_reducer_map == 0);
CILK_ASSERT(ff->right_reducer_map == 0);
CILK_ASSERT(NULL == ff->pending_exception);
CILK_ASSERT(NULL == ff->child_pending_exception);
CILK_ASSERT(NULL == ff->right_pending_exception);
__cilkrts_mutex_destroy(w, &ff->lock);
__cilkrts_frame_free(w, ff, sizeof(*ff));
}
COMMON_PORTABLE void validate_full_frame(full_frame *ff)
{
/* check the magic numbers, for debugging purposes */
if (ff->full_frame_magic_0 != FULL_FRAME_MAGIC_0 ||
ff->full_frame_magic_1 != FULL_FRAME_MAGIC_1)
abort_because_rts_is_corrupted();
}
void __cilkrts_frame_lock(__cilkrts_worker *w, full_frame *ff)
{
validate_full_frame(ff);
__cilkrts_mutex_lock(w, &ff->lock);
}
void __cilkrts_frame_unlock(__cilkrts_worker *w, full_frame *ff)
{
__cilkrts_mutex_unlock(w, &ff->lock);
}
/* End full_frame.c */
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