libcilkrts/runtime/cilk-abi-vla-internal.c

   1 /* cilk-abi-vla-internal.c        -*-C++-*-
   2  *
   3  *************************************************************************
   4  *
   5  *  @copyright
   6  *  Copyright (C) 2013, Intel Corporation
   7  *  All rights reserved.
   8  *
   9  *  @copyright
  10  *  Redistribution and use in source and binary forms, with or without
  11  *  modification, are permitted provided that the following conditions
  12  *  are met:
  13  *
  14  *    * Redistributions of source code must retain the above copyright
  15  *      notice, this list of conditions and the following disclaimer.
  16  *    * Redistributions in binary form must reproduce the above copyright
  17  *      notice, this list of conditions and the following disclaimer in
  18  *      the documentation and/or other materials provided with the
  19  *      distribution.
  20  *    * Neither the name of Intel Corporation nor the names of its
  21  *      contributors may be used to endorse or promote products derived
  22  *      from this software without specific prior written permission.
  23  *
  24  *  @copyright
  25  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  30  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  31  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  32  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  33  *  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
  35  *  WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  *  POSSIBILITY OF SUCH DAMAGE.
  37  **************************************************************************/
  38
  39 /*
  40  * These functions are provided in their own compilation unit so I can debug
  41  * them.  cilk-abi-vla.c must always be compiled with optimization on so that
  42  * inlining occurs.
  43  */
  44
  45 #include "internal/abi.h"
  46 #include "cilk-abi-vla-internal.h"
  47 #include "bug.h"
  48 #include "full_frame.h"
  49 #include "local_state.h"
  50
  51 #include <stdlib.h>
  52 #include <stdint.h>
  53
  54 #include "bug.h"
  55
  56 void *vla_internal_heap_alloc(__cilkrts_stack_frame *sf,
  57                               size_t full_size,
  58                               uint32_t align)
  59 {
  60     return malloc(full_size);
  61 }
  62
  63 void vla_internal_heap_free(void *t, size_t size)
  64 {
  65     free(t);
  66 }
  67
  68 void vla_free_from_original_stack(__cilkrts_stack_frame *sf,
  69                                   size_t full_size)
  70 {
  71     // The __cilkrts_stack_frame must be initialized
  72     CILK_ASSERT(sf->worker);
  73
  74 #if 1
  75     // Add full_size to ff->sync_sp so that when we return, the VLA will no
  76     // longer be allocated on the stack
  77     __cilkrts_adjust_stack(sf->worker->l->frame_ff, full_size);
  78 #else
  79     // Inline __cilkrts_adjust_stack for Kevin
  80     full_frame *ff = sf->worker->l->frame_ff;
  81     ff->sync_sp = ff->sync_sp + full_size;
  82 #endif
  83 }