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

   1 /* cilk-abi-vla-internal.c        -*-C++-*-
   2  *
   3  *************************************************************************
   4  *
   5  *  Copyright (C) 2013-2016, Intel Corporation
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions
  10  *  are met:
  11  *
  12  *    * Redistributions of source code must retain the above copyright
  13  *      notice, this list of conditions and the following disclaimer.
  14  *    * Redistributions in binary form must reproduce the above copyright
  15  *      notice, this list of conditions and the following disclaimer in
  16  *      the documentation and/or other materials provided with the
  17  *      distribution.
  18  *    * Neither the name of Intel Corporation nor the names of its
  19  *      contributors may be used to endorse or promote products derived
  20  *      from this software without specific prior written permission.
  21  *
  22  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  34  *
  35  *  *********************************************************************
  36  *
  37  *  PLEASE NOTE: This file is a downstream copy of a file mainitained in
  38  *  a repository at cilkplus.org. Changes made to this file that are not
  39  *  submitted through the contribution process detailed at
  40  *  http://www.cilkplus.org/submit-cilk-contribution will be lost the next
  41  *  time that a new version is released. Changes only submitted to the
  42  *  GNU compiler collection or posted to the git repository at
  43  *  https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
  44  *  not tracked.
  45  *
  46  *  We welcome your contributions to this open source project. Thank you
  47  *  for your assistance in helping us improve Cilk Plus.
  48  **************************************************************************/
  49
  50 /*
  51  * These functions are provided in their own compilation unit so I can debug
  52  * them.  cilk-abi-vla.c must always be compiled with optimization on so that
  53  * inlining occurs.
  54  */
  55
  56 #include "internal/abi.h"
  57 #include "cilk-abi-vla-internal.h"
  58 #include "bug.h"
  59 #include "full_frame.h"
  60 #include "local_state.h"
  61
  62 #include <stdlib.h>
  63 #include <stdint.h>
  64
  65 #include "bug.h"
  66
  67 void *vla_internal_heap_alloc(__cilkrts_stack_frame *sf,
  68                               size_t full_size,
  69                               uint32_t align)
  70 {
  71     return malloc(full_size);
  72 }
  73
  74 void vla_internal_heap_free(void *t, size_t size)
  75 {
  76     free(t);
  77 }
  78
  79 void vla_free_from_original_stack(__cilkrts_stack_frame *sf,
  80                                   size_t full_size)
  81 {
  82     // The __cilkrts_stack_frame must be initialized
  83     CILK_ASSERT(sf->worker);
  84
  85 #if 1
  86     // Add full_size to ff->sync_sp so that when we return, the VLA will no
  87     // longer be allocated on the stack
  88     __cilkrts_adjust_stack(sf->worker->l->frame_ff, full_size);
  89 #else
  90     // Inline __cilkrts_adjust_stack for Kevin
  91     full_frame *ff = sf->worker->l->frame_ff;
  92     ff->sync_sp = ff->sync_sp + full_size;
  93 #endif
  94 }