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

/* cilk-abi-vla-internal.c        -*-C++-*-
 *
 *************************************************************************
 *
 *  Copyright (C) 2013-2016, Intel Corporation
 *  All rights reserved.
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 *  modification, are permitted provided that the following conditions
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 *      from this software without specific prior written permission.
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 *  PLEASE NOTE: This file is a downstream copy of a file mainitained in
 *  a repository at cilkplus.org. Changes made to this file that are not
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 *  We welcome your contributions to this open source project. Thank you
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 **************************************************************************/

/*
 * These functions are provided in their own compilation unit so I can debug
 * them.  cilk-abi-vla.c must always be compiled with optimization on so that
 * inlining occurs.
 */

#include "internal/abi.h"
#include "cilk-abi-vla-internal.h"
#include "bug.h"
#include "full_frame.h"
#include "local_state.h"

#include <stdlib.h>
#include <stdint.h>

#include "bug.h"

void *vla_internal_heap_alloc(__cilkrts_stack_frame *sf,
                              size_t full_size,
                              uint32_t align)
{
    return malloc(full_size);
}

void vla_internal_heap_free(void *t, size_t size)
{
    free(t);
}

void vla_free_from_original_stack(__cilkrts_stack_frame *sf,
                                  size_t full_size)
{
    // The __cilkrts_stack_frame must be initialized
    CILK_ASSERT(sf->worker);

#if 1
    // Add full_size to ff->sync_sp so that when we return, the VLA will no
    // longer be allocated on the stack
    __cilkrts_adjust_stack(sf->worker->l->frame_ff, full_size);
#else
    // Inline __cilkrts_adjust_stack for Kevin
    full_frame *ff = sf->worker->l->frame_ff;
    ff->sync_sp = ff->sync_sp + full_size;
#endif
}